fix(host): IDD capture immune to display-config stalls/flaps + metronomic-recovery self-diagnosis

Field report (0.8.2→0.8.4): metronomic stutter every ~3.7-4 s, each event a
double-jolt, on ALL clients — and the same box stuttered on Apollo (virtual
display) but not Sunshine (physical). The disturbance class is host-side
display-topology events / display-poller software (SteelSeries-GG class,
Apollo #480/#358/#368) hitting the virtual-display path. Three changes make
the IDD path resilient to it and self-diagnosing:

- DescriptorPoller: the display-descriptor CCD queries (QueryDisplayConfig
  twice per sample) serialize on the session-global display-config lock,
  which topology churn and display-poller software can hold for tens-to-
  hundreds of ms. Polled inline, that stall landed ON the capture/encode
  thread 4x/s — a periodic frame hitch, invisible in any log. A dedicated
  thread now samples every 250 ms and publishes a snapshot; the capture loop
  pays one uncontended mutex read, and a sample slower than 50 ms logs a
  rate-limited warn — the stall is measured instead of streamed.

- Flap immunity: advanced_color_enabled returns Option (None on a failed
  query or the target briefly missing from the active paths during a
  re-probe) and the poller keeps last-known-good per field — a transient no
  longer reads as "HDR off", which used to cost an HDR session TWO spurious
  ring recreates (false, then true again a poll later). On top, a two-strikes
  debounce: only two consecutive samples agreeing on the same new descriptor
  trigger the recreate; a real "Use HDR" flip or game mode-set still lands
  in ~1/2 s.

- RecoveryCadence: served recovery IDRs within 1.5 s coalesce into one event
  (a double-jolt's paired IDRs count once); four consecutive events evenly
  spaced (±20%) warn "client keyframe recoveries are METRONOMIC — a periodic
  host/display disturbance, not random network loss" with the measured
  period (re-warn ≤ every 30 s) — so an affected host self-diagnoses in its
  own log / web console instead of reporting "nothing in the logs". Unit
  tests include the field report's exact double-jolt-pair schedule.

Verified: host tests + clippy clean on Linux and on the RTX box (211/211,
--features nvenc).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.gitea/workflows/android.yml

@@ -103,6 +103,23 @@ jobs:
           # AAB for Play; a universal APK (all ABIs) for direct sideload/testing — same upload key.
           ./gradlew :app:bundleRelease :app:assembleRelease --stacktrace
 
+      # Attach the built APK to the workflow run so it's a one-click sideload download straight from the
+      # run page (no need to know the generic-registry URL) — on EVERY trigger, incl. a PR or a
+      # workflow_dispatch. The debug APK is built on every run; the signed universal release APK exists
+      # only on a main/tag push (its build step above is push-gated), so grab whichever were produced.
+      - name: Attach APK(s) to the workflow run
+        if: always()
+        # v3, not v4: Gitea's artifact backend identifies as GHES, which upload-artifact@v4 refuses
+        # (same reason as apple.yml / *-screenshots.yml). Download is a zip of the matched APK(s).
+        uses: actions/upload-artifact@v3
+        with:
+          name: punktfunk-android-apk
+          path: |
+            clients/android/app/build/outputs/apk/release/*.apk
+            clients/android/app/build/outputs/apk/debug/*.apk
+          if-no-files-found: warn
+          retention-days: 30
+
       # Publish BEFORE the Play upload so artifacts land even while the Play step is still failing.
       # Generic registry is public for reads — matches windows-msix.yml / deb.yml (REGISTRY_TOKEN, user enricobuehler).
       # main = canary store + `canary/` sideload alias; a `vX.Y.Z` tag = `latest/` alias + attached

.gitea/workflows/arch.yml

@@ -42,7 +42,7 @@ jobs:
       - name: Install build + runtime-dev deps
         run: |
           pacman -Syu --noconfirm --needed \
-            git nodejs rust clang cmake nasm pkgconf python \
+            git nodejs rust clang cmake nasm pkgconf python vulkan-headers \
             gtk4 libadwaita sdl3 ffmpeg pipewire wayland libxkbcommon opus libei \
             mesa libglvnd unzip libarchive
           # bun builds the punktfunk-web console AND is vendored as its runtime (PF_WITH_WEB=1);

.gitea/workflows/deb.yml

@@ -60,8 +60,10 @@ jobs:
         run: |
           apt-get update
           # python3 is used by scripts/ci/gitea-release.sh for the stable-tag release attach.
+          # libvulkan-dev: /usr/include/vulkan/vulkan.h for the client's pf-ffvk bindgen
+          # (FFmpeg's hwcontext_vulkan.h includes it).
           apt-get install -y --no-install-recommends dpkg-dev python3 \
-            libgtk-4-dev libadwaita-1-dev libsdl3-dev
+            libgtk-4-dev libadwaita-1-dev libsdl3-dev libvulkan-dev
 
       # Share ci.yml's cache keys so the release build reuses its registry + target artifacts.
       - name: Cache keys
@@ -86,7 +88,10 @@ jobs:
           PUNKTFUNK_BUILD_VERSION: ${{ env.VERSION }}   # stamped into the binary (build.rs)
         run: |
           git config --global --add safe.directory "$PWD"
-          cargo build --release -p punktfunk-host -p punktfunk-client-linux --locked
+          # punktfunk-client-session is the Vulkan/Skia streamer the shell execs for a connect —
+          # both client binaries must ship (build-client-deb.sh installs both).
+          cargo build --release --locked \
+            -p punktfunk-host -p punktfunk-client-linux -p punktfunk-client-session
 
       - name: Build + smoke-boot web console (bun preset)
         # Gate the .deb on a real bun boot: the punktfunk-web .deb runs the Nitro `bun` preset

.gitea/workflows/flatpak.yml

@@ -25,9 +25,15 @@ on:
     branches: [main]
     # The flatpak is the CLIENT — only rebuild when the client/core/manifest change, not on every
     # design/host push (this is a heavy flatpak-builder run). Tags (v*, the client release) build too.
+    # The bundle ships BOTH client binaries (shell + Vulkan session), so every crate in either
+    # binary's dependency closure must be listed here.
     paths:
       - 'clients/linux/**'
+      - 'clients/session/**'
       - 'crates/punktfunk-core/**'
+      - 'crates/pf-client-core/**'
+      - 'crates/pf-presenter/**'
+      - 'crates/pf-console-ui/**'
       - 'packaging/flatpak/**'
       - 'Cargo.lock'
       - '.gitea/workflows/flatpak.yml'

.gitea/workflows/linux-client-screenshots.yml

@@ -30,7 +30,7 @@ jobs:
         run: |
           apt-get update
           apt-get install -y --no-install-recommends \
-            libgtk-4-dev libadwaita-1-dev libsdl3-dev \
+            libgtk-4-dev libadwaita-1-dev libsdl3-dev libvulkan-dev \
             xvfb x11-utils imagemagick scrot \
             libgl1-mesa-dri mesa-vulkan-drivers \
             adwaita-icon-theme fonts-cantarell fonts-dejavu-core

.gitea/workflows/rpm.yml

@@ -54,7 +54,9 @@ jobs:
       - name: Prep
         run: |
           git config --global --add safe.directory "$PWD"
-          dnf -y install gtk4-devel libadwaita-devel SDL3-devel
+          # vulkan-headers: the client's pf-ffvk crate runs bindgen over FFmpeg's
+          # libavutil/hwcontext_vulkan.h (#include <vulkan/vulkan.h>).
+          dnf -y install gtk4-devel libadwaita-devel SDL3-devel vulkan-headers
           # sysext build (packaging/bazzite/build-sysext.sh): squashfs + SELinux labeling.
           dnf -y install squashfs-tools cpio libselinux-utils selinux-policy-targeted
           # bun builds the punktfunk-web console (--with web). Baked into the image; install it

.gitea/workflows/windows-msix.yml

@@ -33,7 +33,12 @@ on:
     branches: [main]
     paths:
       - 'clients/windows/**'
+      - 'clients/session/**'
       - 'crates/punktfunk-core/**'
+      - 'crates/pf-client-core/**'
+      - 'crates/pf-presenter/**'
+      - 'crates/pf-console-ui/**'
+      - 'crates/pf-ffvk/**'
       - 'Cargo.lock'
       - 'Cargo.toml'
       - '.gitea/workflows/windows-msix.yml'
@@ -57,10 +62,15 @@ jobs:
             target: x86_64-pc-windows-msvc
             ffmpeg: C:\Users\Public\ffmpeg
             td: C:\t
+            session_flags: ''
           - arch: arm64
             target: aarch64-pc-windows-msvc
             ffmpeg: C:\Users\Public\ffmpeg-arm64
             td: C:\t-a64
+            # No skia-binaries prebuilt for aarch64-pc-windows-msvc: the session ships
+            # without the Skia console UI on ARM64 (streaming unaffected) — flip when
+            # rust-skia adds the target.
+            session_flags: '--no-default-features'
     steps:
       - uses: actions/checkout@v4
 
@@ -78,6 +88,8 @@ jobs:
           "CARGO_WORKSPACE_DIR=$env:GITHUB_WORKSPACE" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
           "CARGO_TARGET_DIR=${{ matrix.td }}" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
           "FFMPEG_DIR=${{ matrix.ffmpeg }}" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
+          # pf-ffvk's bindgen needs Vulkan headers (arch-independent; provisioned alongside FFmpeg).
+          "PF_FFVK_VULKAN_INCLUDE=C:\Users\Public\vulkan-headers\include" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
           rustup target add ${{ matrix.target }}
           $pf = & "$env:GITHUB_WORKSPACE/scripts/ci/pf-version.ps1"   # single source of truth: base is one minor ahead of the latest stable tag
           $parts = if ($env:GITHUB_REF -like 'refs/tags/v*') {
@@ -92,9 +104,11 @@ jobs:
           "MSIX_VERSION=$v" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
           Write-Output "MSIX version $v  arch ${{ matrix.arch }}  target ${{ matrix.target }}"
 
+      # Both client binaries — the shell spawns punktfunk-session.exe (a package sibling)
+      # for every stream. --no-default-features on ARM64 is a no-op for the shell.
       - name: Build (release)
         shell: pwsh
-        run: cargo build --release -p punktfunk-client-windows --target ${{ matrix.target }}
+        run: cargo build --release -p punktfunk-client-windows -p punktfunk-client-session ${{ matrix.session_flags }} --target ${{ matrix.target }}
 
       - name: Pack + sign MSIX
         shell: pwsh

.gitea/workflows/windows.yml

@@ -1,9 +1,13 @@
 # Windows client CI — runs on a self-hosted windows-amd64 runner (host mode; the generic runner +
-# toolchain come from unom/infra's windows-runner/; punktfunk's own extras - FFmpeg, WDK, Inno
+# toolchain come from unom/infra's windows-runner/; punktfunk's own extras - FFmpeg,
-# Setup, the ARM64 rustup target - self-provision via the "Ensure Windows toolchain" step below, a
+# Vulkan-Headers, WDK, Inno Setup, the ARM64 rustup target - self-provision via the "Ensure
-# fast no-op once already present, so any runner with that label works with no manual dispatch
+# Windows toolchain" step below, a fast no-op once already present, so any runner with that label
-# step first). Build + clippy + fmt + test the WinUI 3 client
+# works with no manual dispatch step first). Build + clippy + fmt + test BOTH client binaries:
-# (windows-reactor + D3D11/SwapChainPanel + WASAPI + SDL3).
+# the WinUI 3 shell (windows-reactor + WASAPI + SDL3) and the punktfunk-session Vulkan client
+# (pf-presenter/pf-client-core/pf-console-ui/pf-ffvk — every stream runs in it, spawned by the
+# shell). ARM64 note: rust-skia publishes no aarch64-pc-windows-msvc prebuilt binaries, so the
+# session builds --no-default-features there (no Skia console UI; streaming is unaffected) —
+# flip when skia-binaries adds the target.
 #
 # Two architectures from ONE x64 runner: x86_64-pc-windows-msvc natively and
 # aarch64-pc-windows-msvc by cross-compiling. The x64 MSVC toolset ships an ARM64 cross compiler
@@ -40,14 +44,24 @@ on:
     branches: [main]
     paths:
       - 'clients/windows/**'
+      - 'clients/session/**'
       - 'crates/punktfunk-core/**'
+      - 'crates/pf-client-core/**'
+      - 'crates/pf-presenter/**'
+      - 'crates/pf-console-ui/**'
+      - 'crates/pf-ffvk/**'
       - 'Cargo.lock'
       - 'Cargo.toml'
       - '.gitea/workflows/windows.yml'
   pull_request:
     paths:
       - 'clients/windows/**'
+      - 'clients/session/**'
       - 'crates/punktfunk-core/**'
+      - 'crates/pf-client-core/**'
+      - 'crates/pf-presenter/**'
+      - 'crates/pf-console-ui/**'
+      - 'crates/pf-ffvk/**'
       - 'Cargo.lock'
       - 'Cargo.toml'
       - '.gitea/workflows/windows.yml'
@@ -78,6 +92,8 @@ jobs:
           # Per-arch FFmpeg import libs (provision-windows-punktfunk-extras.ps1 fetches both).
           $ff = if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { 'C:\Users\Public\ffmpeg-arm64' } else { 'C:\Users\Public\ffmpeg' }
           "FFMPEG_DIR=$ff" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
+          # pf-ffvk's bindgen needs Vulkan headers (arch-independent; provisioned alongside FFmpeg).
+          "PF_FFVK_VULKAN_INCLUDE=C:\Users\Public\vulkan-headers\include" | Out-File -FilePath $env:GITHUB_ENV -Append -Encoding utf8
           # $ff\bin on PATH too (not just FFMPEG_DIR, which only satisfies the linker): the test
           # binary needs the actual DLLs to load at runtime. Set here rather than relying on the
           # daemon's own env (project-env.ps1) - on a freshly cloned/registered runner the daemon
@@ -89,20 +105,29 @@ jobs:
           cargo --version
           Write-Output "target ${{ matrix.target }}  target-dir $td  ffmpeg $ff"
 
+      # Both client binaries. ARM64: no skia-binaries prebuilt for the target, so the session
+      # drops its `ui` feature there (pf-console-ui excluded; --no-default-features is a no-op
+      # for the shell, which has no features).
       - name: Build
         shell: pwsh
-        run: cargo build -p punktfunk-client-windows --target ${{ matrix.target }}
+        run: |
+          $sf = @(); if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { $sf = @('--no-default-features') }
+          cargo build -p punktfunk-client-windows -p punktfunk-client-session @sf --target ${{ matrix.target }}
 
       - name: Clippy (-D warnings)
         shell: pwsh
-        run: cargo clippy -p punktfunk-client-windows --all-targets --target ${{ matrix.target }} -- -D warnings
+        run: |
+          $pkgs = @('-p','punktfunk-client-windows','-p','punktfunk-client-session','-p','pf-client-core','-p','pf-presenter','-p','pf-ffvk')
+          $sf = @()
+          if ('${{ matrix.target }}' -eq 'aarch64-pc-windows-msvc') { $sf = @('--no-default-features') } else { $pkgs += @('-p','pf-console-ui') }
+          cargo clippy @pkgs --all-targets @sf --target ${{ matrix.target }} -- -D warnings
 
       - name: Rustfmt check
         if: matrix.target == 'x86_64-pc-windows-msvc'
         shell: pwsh
-        run: cargo fmt -p punktfunk-client-windows -- --check
+        run: cargo fmt -p punktfunk-client-windows -p punktfunk-client-session -p pf-client-core -p pf-presenter -p pf-console-ui -p pf-ffvk -- --check
 
       - name: Test
         if: matrix.target == 'x86_64-pc-windows-msvc'
         shell: pwsh
-        run: cargo test -p punktfunk-client-windows --target ${{ matrix.target }}
+        run: cargo test -p punktfunk-client-windows -p punktfunk-client-session -p pf-client-core -p pf-presenter -p pf-console-ui -p pf-ffvk --target ${{ matrix.target }}

.gitignore

@@ -34,3 +34,7 @@ __pycache__/
 
 # Claude Code project instructions — local to each dev box, not part of the repo.
 CLAUDE.md
+
+# Local flatpak-builder output (build-flatpak.sh) — ostree repo + build dir at the repo root.
+.flatpak-repo/
+.flatpak-build/

Cargo.lock

@@ -472,6 +472,8 @@ dependencies = [
  "cexpr",
  "clang-sys",
  "itertools 0.13.0",
+ "log",
+ "prettyplease",
  "proc-macro2",
  "quote",
  "regex",
@@ -889,9 +891,9 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.18"
+version = "0.9.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5b82ac4a3c2ca9c3460964f020e1402edd5753411d7737aa39c3714ad1b5420e"
+checksum = "2d6914041f254d6e9176c01941b21115dcfb7089e55135a35411081bd106ef3f"
 dependencies = [
  "crossbeam-utils",
 ]
@@ -1144,6 +1146,9 @@ name = "fastrand"
 version = "2.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f1f227452a390804cdb637b74a86990f2a7d7ba4b7d5693aac9b4dd6defd8d6"
+dependencies = [
+ "getrandom 0.3.4",
+]
 
 [[package]]
 name = "fec-rs"
@@ -1193,6 +1198,16 @@ dependencies = [
  "rustc_version",
 ]
 
+[[package]]
+name = "filetime"
+version = "0.2.29"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c287a33c7f0a620c38e641e7f60827713987b3c0f26e8ddc9462cc69cf75759"
+dependencies = [
+ "cfg-if",
+ "libc",
+]
+
 [[package]]
 name = "find-msvc-tools"
 version = "0.1.9"
@@ -1221,6 +1236,7 @@ version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e139bc46ca777eb5efaf62df0ab8cc5fd400866427e56c68b22e414e53bd3be"
 dependencies = [
+ "fastrand",
  "futures-core",
  "futures-sink",
  "spin",
@@ -1247,6 +1263,15 @@ dependencies = [
  "percent-encoding",
 ]
 
+[[package]]
+name = "fragile"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8878864ba14bb86e818a412bfd6f18f9eabd4ec0f008a28e8f7eb61db532fcf9"
+dependencies = [
+ "futures-core",
+]
+
 [[package]]
 name = "fs-err"
 version = "3.3.0"
@@ -2129,7 +2154,7 @@ dependencies = [
 
 [[package]]
 name = "latency-probe"
-version = "0.8.2"
+version = "0.8.4"
 
 [[package]]
 name = "lazy_static"
@@ -2261,7 +2286,7 @@ checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad"
 
 [[package]]
 name = "loss-harness"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "punktfunk-core",
 ]
@@ -2382,8 +2407,6 @@ dependencies = [
 [[package]]
 name = "ndk"
 version = "0.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3f42e7bbe13d351b6bead8286a43aac9534b82bd3cc43e47037f012ebfd62d4"
 dependencies = [
  "bitflags",
  "jni-sys 0.3.1",
@@ -2740,6 +2763,42 @@ version = "2.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9b4f627cb1b25917193a259e49bdad08f671f8d9708acfd5fe0a8c1455d87220"
 
+[[package]]
+name = "pf-client-core"
+version = "0.8.4"
+dependencies = [
+ "anyhow",
+ "async-channel",
+ "ffmpeg-next",
+ "mdns-sd",
+ "opus",
+ "pf-ffvk",
+ "pipewire",
+ "punktfunk-core",
+ "rustls",
+ "sdl3",
+ "serde",
+ "serde_json",
+ "tracing",
+ "ureq",
+ "wasapi",
+ "windows 0.62.2 (git+https://github.com/microsoft/windows-rs?rev=a4f7b2cb7c63c6bb7fc77a2affe57145be1d8c4f)",
+]
+
+[[package]]
+name = "pf-console-ui"
+version = "0.8.4"
+dependencies = [
+ "anyhow",
+ "ash",
+ "pf-client-core",
+ "pf-presenter",
+ "punktfunk-core",
+ "sdl3",
+ "skia-safe",
+ "tracing",
+]
+
 [[package]]
 name = "pf-driver-proto"
 version = "0.0.1"
@@ -2747,6 +2806,30 @@ dependencies = [
  "bytemuck",
 ]
 
+[[package]]
+name = "pf-ffvk"
+version = "0.8.4"
+dependencies = [
+ "ash",
+ "bindgen",
+ "pkg-config",
+]
+
+[[package]]
+name = "pf-presenter"
+version = "0.8.4"
+dependencies = [
+ "anyhow",
+ "ash",
+ "async-channel",
+ "pf-client-core",
+ "pf-ffvk",
+ "punktfunk-core",
+ "sdl3",
+ "tracing",
+ "windows-sys 0.61.2",
+]
+
 [[package]]
 name = "pin-project-lite"
 version = "0.2.17"
@@ -2869,13 +2952,23 @@ dependencies = [
  "zerocopy",
 ]
 
+[[package]]
+name = "prettyplease"
+version = "0.2.37"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "479ca8adacdd7ce8f1fb39ce9ecccbfe93a3f1344b3d0d97f20bc0196208f62b"
+dependencies = [
+ "proc-macro2",
+ "syn",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "3.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e67ba7e9b2b56446f1d419b1d807906278ffa1a658a8a5d8a39dcb1f5a78614f"
 dependencies = [
- "toml_edit",
+ "toml_edit 0.25.12+spec-1.1.0",
 ]
 
 [[package]]
@@ -2908,7 +3001,7 @@ dependencies = [
 
 [[package]]
 name = "punktfunk-client-android"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "android_logger",
  "jni",
@@ -2916,6 +3009,7 @@ dependencies = [
  "log",
  "mdns-sd",
  "ndk",
+ "ndk-sys",
  "opus",
  "punktfunk-core",
  "tracing",
@@ -2923,30 +3017,38 @@ dependencies = [
 
 [[package]]
 name = "punktfunk-client-linux"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "anyhow",
  "async-channel",
- "ffmpeg-next",
  "gtk4",
- "khronos-egl",
  "libadwaita",
- "mdns-sd",
+ "pf-client-core",
- "opus",
- "pipewire",
  "punktfunk-core",
- "rustls",
+ "relm4",
- "sdl3",
- "serde",
  "serde_json",
  "tracing",
  "tracing-subscriber",
- "ureq",
+]
+
+[[package]]
+name = "punktfunk-client-session"
+version = "0.8.4"
+dependencies = [
+ "anyhow",
+ "pf-client-core",
+ "pf-console-ui",
+ "pf-presenter",
+ "punktfunk-core",
+ "serde_json",
+ "tracing",
+ "tracing-subscriber",
+ "winresource",
 ]
 
 [[package]]
 name = "punktfunk-client-windows"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "anyhow",
  "async-channel",
@@ -2954,6 +3056,7 @@ dependencies = [
  "ffmpeg-next",
  "mdns-sd",
  "opus",
+ "pf-client-core",
  "punktfunk-core",
  "sdl3",
  "serde",
@@ -2969,7 +3072,7 @@ dependencies = [
 
 [[package]]
 name = "punktfunk-core"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "aes-gcm",
  "bytes",
@@ -3000,7 +3103,7 @@ dependencies = [
 
 [[package]]
 name = "punktfunk-host"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "aes",
  "aes-gcm",
@@ -3072,7 +3175,7 @@ dependencies = [
 
 [[package]]
 name = "punktfunk-probe"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "anyhow",
  "mdns-sd",
@@ -3086,7 +3189,7 @@ dependencies = [
 
 [[package]]
 name = "punktfunk-tray"
-version = "0.8.2"
+version = "0.8.4"
 dependencies = [
  "anyhow",
  "ksni",
@@ -3371,6 +3474,41 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "relm4"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6420f090f0545e9ec9656469d139a4e1b66ff9c30b808fe2247892724f71a198"
+dependencies = [
+ "flume",
+ "fragile",
+ "futures",
+ "gtk4",
+ "libadwaita",
+ "once_cell",
+ "relm4-css",
+ "relm4-macros",
+ "tokio",
+ "tracing",
+]
+
+[[package]]
+name = "relm4-css"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3b81d263f784b103c815afa29124486b59741eca069ce7a5999efb14f13c368"
+
+[[package]]
+name = "relm4-macros"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "36c9dbf50a60c82375e66b61d522c936b187a11b25c0a42e91c516326ad24a4f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "ring"
 version = "0.17.14"
@@ -3691,6 +3829,7 @@ version = "0.6.6+SDL-3.4.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "04e7f134def04ed72e6f55187c6c29c72f7dab5d359c4be0dd49c9b97fef59c7"
 dependencies = [
+ "ash",
  "cc",
  "cmake",
  "pkg-config",
@@ -3813,6 +3952,15 @@ dependencies = [
  "syn",
 ]
 
+[[package]]
+name = "serde_spanned"
+version = "0.6.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bf41e0cfaf7226dca15e8197172c295a782857fcb97fad1808a166870dee75a3"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "serde_spanned"
 version = "1.1.1"
@@ -3898,6 +4046,35 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8ee5873ec9cce0195efcb7a4e9507a04cd49aec9c83d0389df45b1ef7ba2e649"
 
+[[package]]
+name = "skia-bindings"
+version = "0.87.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "704242769235d2ffe66a2a0a3002661262fc4af08d32807c362d7b0160ee703c"
+dependencies = [
+ "bindgen",
+ "cc",
+ "flate2",
+ "heck",
+ "lazy_static",
+ "pkg-config",
+ "regex",
+ "serde_json",
+ "tar",
+ "toml 0.8.23",
+]
+
+[[package]]
+name = "skia-safe"
+version = "0.87.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f7d94f3e7537c71ad4cf132eb26e3be8c8a886ed3649c4525c089041fc312b2"
+dependencies = [
+ "bitflags",
+ "lazy_static",
+ "skia-bindings",
+]
+
 [[package]]
 name = "slab"
 version = "0.4.12"
@@ -4033,6 +4210,17 @@ dependencies = [
  "version-compare",
 ]
 
+[[package]]
+name = "tar"
+version = "0.4.46"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3f6221d9a6003c78398e3b239969f352578258df48c8eb051caadae0015bc840"
+dependencies = [
+ "filetime",
+ "libc",
+ "xattr",
+]
+
 [[package]]
 name = "target-lexicon"
 version = "0.13.5"
@@ -4218,6 +4406,18 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "toml"
+version = "0.8.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dc1beb996b9d83529a9e75c17a1686767d148d70663143c7854d8b4a09ced362"
+dependencies = [
+ "serde",
+ "serde_spanned 0.6.9",
+ "toml_datetime 0.6.11",
+ "toml_edit 0.22.27",
+]
+
 [[package]]
 name = "toml"
 version = "0.9.12+spec-1.1.0"
@@ -4226,7 +4426,7 @@ checksum = "cf92845e79fc2e2def6a5d828f0801e29a2f8acc037becc5ab08595c7d5e9863"
 dependencies = [
  "indexmap",
  "serde_core",
- "serde_spanned",
+ "serde_spanned 1.1.1",
  "toml_datetime 0.7.5+spec-1.1.0",
  "toml_parser",
  "toml_writer",
@@ -4241,13 +4441,22 @@ checksum = "81f3d15e84cbcd896376e6730314d59fb5a87f31e4b038454184435cd57defee"
 dependencies = [
  "indexmap",
  "serde_core",
- "serde_spanned",
+ "serde_spanned 1.1.1",
  "toml_datetime 1.1.1+spec-1.1.0",
  "toml_parser",
  "toml_writer",
  "winnow 1.0.3",
 ]
 
+[[package]]
+name = "toml_datetime"
+version = "0.6.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "22cddaf88f4fbc13c51aebbf5f8eceb5c7c5a9da2ac40a13519eb5b0a0e8f11c"
+dependencies = [
+ "serde",
+]
+
 [[package]]
 name = "toml_datetime"
 version = "0.7.5+spec-1.1.0"
@@ -4266,6 +4475,20 @@ dependencies = [
  "serde_core",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.22.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41fe8c660ae4257887cf66394862d21dbca4a6ddd26f04a3560410406a2f819a"
+dependencies = [
+ "indexmap",
+ "serde",
+ "serde_spanned 0.6.9",
+ "toml_datetime 0.6.11",
+ "toml_write",
+ "winnow 0.7.15",
+]
+
 [[package]]
 name = "toml_edit"
 version = "0.25.12+spec-1.1.0"
@@ -4287,6 +4510,12 @@ dependencies = [
  "winnow 1.0.3",
 ]
 
+[[package]]
+name = "toml_write"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801"
+
 [[package]]
 name = "toml_writer"
 version = "1.1.1+spec-1.1.0"
@@ -5330,6 +5559,9 @@ name = "winnow"
 version = "0.7.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df79d97927682d2fd8adb29682d1140b343be4ac0f08fd68b7765d9c059d3945"
+dependencies = [
+ "memchr",
+]
 
 [[package]]
 name = "winnow"
@@ -5389,6 +5621,16 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "xattr"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32e45ad4206f6d2479085147f02bc2ef834ac85886624a23575ae137c8aa8156"
+dependencies = [
+ "libc",
+ "rustix",
+]
+
 [[package]]
 name = "xkbcommon"
 version = "0.8.0"

Cargo.toml

@@ -5,19 +5,36 @@ members = [
     "crates/punktfunk-host",
     "crates/punktfunk-host/vendor/usbip-sim",
     "crates/punktfunk-tray",
+    "crates/pf-client-core",
+    "crates/pf-presenter",
+    "crates/pf-console-ui",
+    "crates/pf-ffvk",
     "crates/pf-driver-proto",
     "clients/probe",
     "clients/linux",
+    "clients/session",
     "clients/windows",
     "clients/android/native",
     "tools/latency-probe",
     "tools/loss-harness",
 ]
 # Standalone PoC (built on its own; pulls usbip/tokio/libusb we don't want in the workspace).
-exclude = ["packaging/linux/steam-deck-gadget/usbip-poc"]
+# The vendored `ndk` is a [patch.crates-io] source, not a member: it only compiles for the
+# `*-linux-android` targets, so workspace membership would break host `cargo build --workspace`.
+exclude = [
+    "packaging/linux/steam-deck-gadget/usbip-poc",
+    "clients/android/native/vendor/ndk",
+]
+
+# ndk 0.9.0 verbatim from crates.io plus ONE visibility change: `MediaCodec::as_ptr` made public
+# (upstream keeps it private and exposes no frame-rendered binding), so the Android client can
+# call `AMediaCodec_setOnFrameRenderedCallback` via ndk-sys for the HUD's `display` stage
+# (design/stats-unification.md). Drop the patch when upstream exposes the pointer or the callback.
+[patch.crates-io]
+ndk = { path = "clients/android/native/vendor/ndk" }
 
 [workspace.package]
-version = "0.8.2"
+version = "0.8.4"
 edition = "2021"
 rust-version = "1.82"
 license = "MIT OR Apache-2.0"

api/openapi.json

@@ -10,7 +10,7 @@
       "name": "MIT OR Apache-2.0",
       "identifier": "MIT OR Apache-2.0"
     },
-    "version": "0.8.2"
+    "version": "0.8.4"
   },
   "paths": {
     "/api/v1/clients": {

ci/fedora-rpm.Dockerfile

@@ -27,6 +27,8 @@ RUN dnf -y install \
       mesa-libGL-devel mesa-libgbm-devel \
       # punktfunk-client link deps (GTK4 shell + SDL3 gamepads)
       gtk4-devel libadwaita-devel SDL3-devel \
+      # pf-ffvk bindgen over libavutil/hwcontext_vulkan.h needs <vulkan/vulkan.h>
+      vulkan-headers \
   && dnf clean all
 
 # bun — both the BUILD tool and the RUNTIME for the punktfunk-web console (`bun run build` -> the

ci/rust-ci.Dockerfile

@@ -22,6 +22,8 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
     libgl-dev libegl-dev libgbm-dev \
     # punktfunk-client-linux (GTK4/libadwaita shell, SDL3 gamepads)
     libgtk-4-dev libadwaita-1-dev libsdl3-dev \
+    # pf-ffvk (bindgen over libavutil/hwcontext_vulkan.h needs <vulkan/vulkan.h>)
+    libvulkan-dev \
     && rm -rf /var/lib/apt/lists/*
 
 # bun — builds the punktfunk-web console in deb.yml (which runs the web build in THIS image).

clients/android/app/build.gradle.kts

@@ -11,7 +11,7 @@ plugins {
 
 android {
     namespace = "io.unom.punktfunk"
-    compileSdk = 37 // Android 17 — required by androidx.core 1.19.0; targetSdk stays 36 for now.
+    compileSdk = 37 // Android 17 — required by androidx.core 1.19.0.
 
     defaultConfig {
         // Load from .env if it exists (local dev), otherwise from System.getenv (CI)
@@ -26,7 +26,11 @@ android {
         // the handful of API 31+ APIs we use are runtime-gated (Material You → brand palette, rumble
         // → legacy Vibrator, NEARBY_WIFI/lights/ADPF already gated), so nothing is lost above 28.
         minSdk = 28
-        targetSdk = 36
+        // Android 17: targeting 37 makes Local Network Protection MANDATORY — all LAN traffic (the
+        // QUIC dial, mDNS, WoL, the library fetch) is blocked until the user grants the
+        // ACCESS_LOCAL_NETWORK runtime permission. ConnectScreen owns that request/rationale flow;
+        // don't bump past 37 without re-checking the next release's behavior changes.
+        targetSdk = 37
         val vCode = (props.getProperty("VERSION_CODE") ?: System.getenv("VERSION_CODE"))
         versionCode = vCode?.toInt() ?: 1
         // versionName is the single project version, threaded from CI (a vX.Y.Z release or a

clients/android/app/src/main/AndroidManifest.xml

@@ -19,8 +19,9 @@
          Its absence went unnoticed for weeks because the acquire was wrapped in a silent
          runCatching (now logged). -->
     <uses-permission android:name="android.permission.WAKE_LOCK" />
-    <!-- Enforced from Android 17 (SDK 37) for ALL local-network traffic incl. the QUIC socket.
+    <!-- Enforced from Android 17 (SDK 37, our targetSdk) for ALL local-network traffic incl. the
-         Harmless to declare on earlier releases. -->
+         QUIC socket — a RUNTIME permission (NEARBY_DEVICES group): ConnectScreen requests it on
+         entry and gates every dial/wake on the grant. Harmless to declare on earlier releases. -->
     <uses-permission android:name="android.permission.ACCESS_LOCAL_NETWORK" />
     <!-- Mic uplink to the host's virtual microphone (requested at runtime). -->
     <uses-permission android:name="android.permission.RECORD_AUDIO" />

clients/android/app/src/main/kotlin/io/unom/punktfunk/ConnectDialogs.kt

@@ -155,6 +155,35 @@ internal fun TrustNewHostDialog(
     )
 }
 
+/**
+ * Android 17+ Local Network Protection rationale: ACCESS_LOCAL_NETWORK was denied, so discovery and
+ * every connect are dead — offer the system prompt again and a settings deep link (a permanently-
+ * denied request returns instantly without ever showing the prompt, so "Allow" alone isn't enough).
+ */
+@Composable
+internal fun LocalNetworkDialog(onAllow: () -> Unit, onSettings: () -> Unit, onDismiss: () -> Unit) {
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = { Text("Allow local network access") },
+        text = {
+            Text(
+                "Android blocks punktfunk from talking to devices on your network, so it can't " +
+                    "find or reach any host until you allow it. If no prompt appears when you tap " +
+                    "Allow, enable “Nearby devices” for punktfunk in system settings.",
+            )
+        },
+        confirmButton = {
+            TextButton(onClick = onAllow) { Text("Allow") }
+        },
+        dismissButton = {
+            Row {
+                TextButton(onClick = onSettings) { Text("Open settings") }
+                TextButton(onClick = onDismiss) { Text("Not now") }
+            }
+        },
+    )
+}
+
 /** The pinned fingerprint no longer matches — force re-pairing (never a silent re-trust). */
 @Composable
 internal fun FingerprintChangedDialog(

clients/android/app/src/main/kotlin/io/unom/punktfunk/ConnectScreen.kt

@@ -2,7 +2,9 @@ package io.unom.punktfunk
 
 import android.Manifest
 import android.content.Context
+import android.content.Intent
 import android.content.pm.PackageManager
+import android.net.Uri
 import android.os.Build
 import androidx.activity.compose.rememberLauncherForActivityResult
 import androidx.activity.result.contract.ActivityResultContracts
@@ -30,6 +32,7 @@ import androidx.compose.material3.Icon
 import androidx.compose.material3.MaterialTheme
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
+import androidx.compose.material3.TextButton
 import androidx.compose.runtime.Composable
 import androidx.compose.runtime.DisposableEffect
 import androidx.compose.runtime.LaunchedEffect
@@ -37,6 +40,7 @@ import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
 import androidx.compose.runtime.rememberCoroutineScope
+import androidx.compose.runtime.rememberUpdatedState
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
@@ -44,6 +48,9 @@ import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
 import androidx.core.content.ContextCompat
+import androidx.lifecycle.Lifecycle
+import androidx.lifecycle.LifecycleEventObserver
+import androidx.lifecycle.LifecycleOwner
 import io.unom.punktfunk.components.EmptyHostsState
 import io.unom.punktfunk.components.HostCard
 import io.unom.punktfunk.components.SectionLabel
@@ -60,6 +67,7 @@ import io.unom.punktfunk.models.HostStatus
 import io.unom.punktfunk.models.PendingTrust
 import java.util.concurrent.atomic.AtomicBoolean
 import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.delay
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
 
@@ -111,14 +119,57 @@ fun ConnectScreen(
     // denial used to leave discovery dead forever.
     val discovery = remember { HostDiscovery(context) }
     var discovered by remember { mutableStateOf<List<DiscoveredHost>>(emptyList()) }
+    // Android 17 Local Network Protection: with targetSdk 37, EVERYTHING this screen does — the mDNS
+    // browse, the QUIC dial (UDP 9777), Wake-on-LAN, the library fetch — is blocked until the user
+    // grants ACCESS_LOCAL_NETWORK (a runtime permission in the NEARBY_DEVICES group). Blocked UDP
+    // fails with EPERM, which quinn experiences as a silent handshake timeout — so without this gate
+    // a denial looks exactly like a dead host. Unlike NEARBY_WIFI_DEVICES below, this one is
+    // load-bearing: request it on entry, and surface a denial as an actionable dialog/banner (with a
+    // system-settings deep link) instead of dead-ending on timeouts.
+    var lnpGranted by remember { mutableStateOf(hasLocalNetworkPermission(context)) }
+    var lnpPrompt by remember { mutableStateOf(false) }
+    val localNetLauncher = rememberLauncherForActivityResult(
+        ActivityResultContracts.RequestPermission(),
+    ) { granted ->
+        lnpGranted = granted
+        if (granted) {
+            lnpPrompt = false
+            // The browse started while blocked (its sockets failed or received nothing) — restart it
+            // now that the grant makes them work.
+            discovery.stop()
+            discovery.start()
+        } else {
+            lnpPrompt = true // rationale + "Open settings" (a permanently-denied request returns instantly)
+        }
+    }
     val nearbyLauncher = rememberLauncherForActivityResult(
         ActivityResultContracts.RequestPermission(),
     ) { _ -> /* best-effort hint; discovery runs regardless of the result */ }
     LaunchedEffect(Unit) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU && !hasNearbyPermission(context)) {
+        if (!lnpGranted) {
+            localNetLauncher.launch(Manifest.permission.ACCESS_LOCAL_NETWORK)
+        } else if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU && !hasNearbyPermission(context)) {
+            // The old opportunistic multicast hedge (some OEMs filter multicast without it). On API
+            // 37+ it shares the NEARBY_DEVICES group with ACCESS_LOCAL_NETWORK, so once that is
+            // granted this auto-grants without a second prompt.
             nearbyLauncher.launch(Manifest.permission.NEARBY_WIFI_DEVICES)
         }
     }
+    // Re-check on resume: our dialog deep-links to system settings, and granting there doesn't kill
+    // or otherwise notify the app — this observer is what turns the grant into a live discovery.
+    DisposableEffect(Unit) {
+        val lifecycle = (context as? LifecycleOwner)?.lifecycle
+        val obs = LifecycleEventObserver { _, event ->
+            if (event == Lifecycle.Event.ON_RESUME && !lnpGranted && hasLocalNetworkPermission(context)) {
+                lnpGranted = true
+                lnpPrompt = false
+                discovery.stop()
+                discovery.start()
+            }
+        }
+        lifecycle?.addObserver(obs)
+        onDispose { lifecycle?.removeObserver(obs) }
+    }
     DisposableEffect(Unit) {
         discovery.onChange = { discovered = it }
         discovery.start()
@@ -154,6 +205,29 @@ fun ConnectScreen(
         }
         if (learned) savedHosts = knownHostStore.all()
     }
+    // Saved hosts proven reachable by a QUIC probe this cycle, keyed "address:port" — the
+    // routed-network (Tailscale/VPN) counterpart to mDNS presence, since such hosts never
+    // advertise. OR'd into `isOnline` below so their pips light up. Probe only saved hosts NOT
+    // already seen on mDNS, off the main thread, every ~12 s; gated on LNP (blocked UDP would
+    // just time out). `rememberUpdatedState` keeps the 1 Hz mDNS updates from restarting the loop.
+    var reachable by remember { mutableStateOf<Set<String>>(emptySet()) }
+    val discoveredNow by rememberUpdatedState(discovered)
+    LaunchedEffect(savedHosts, lnpGranted) {
+        if (!lnpGranted) {
+            reachable = emptySet()
+            return@LaunchedEffect
+        }
+        while (true) {
+            val targets = savedHosts.filter { kh -> discoveredNow.none { kh.matches(it) } }
+            reachable = withContext(Dispatchers.IO) {
+                targets
+                    .filter { NativeBridge.nativeProbe(it.address, it.port, 3_000) }
+                    .map { "${it.address}:${it.port}" }
+                    .toSet()
+            }
+            delay(12_000)
+        }
+    }
     // Mint-once on genuine first run; an Unrecoverable store (decrypt failure) surfaces here and
     // refuses to connect — never silently shadow-minting a new identity (which would force re-pair).
     var identity by remember { mutableStateOf<ClientIdentity?>(null) }
@@ -185,8 +259,10 @@ fun ConnectScreen(
 
     // The actual dial (identity already ready). On a TOFU connect (pinHex null), pin the fingerprint
     // the host presented (as an unpaired known host) so the next connect goes straight through and it
-    // appears in the saved-hosts list.
+    // appears in the saved-hosts list. [onFailure], when set, takes over a failed dial (the wake-wait
-    fun doConnectDirect(targetHost: String, targetPort: Int, name: String, pinHex: String?) {
+    // fallback) instead of the error status line — discovery is already restarted when it runs, so
+    // the wait can observe the host reappear.
+    fun doConnectDirect(targetHost: String, targetPort: Int, name: String, pinHex: String?, onFailure: (() -> Unit)? = null) {
         val id = identity ?: run {
             status = "Identity not ready yet — try again in a moment"
             return
@@ -206,18 +282,25 @@ fun ConnectScreen(
                 }
                 onConnected(handle)
             } else {
-                status = "Connection failed — check host/port, PIN, and logcat"
                 discovery.start()
+                if (onFailure != null) {
+                    status = ""
+                    onFailure()
+                } else {
+                    status = "Connection failed — check host/port, PIN, and logcat"
+                }
             }
         }
     }
 
     // Wake-aware connect. If auto-wake is on (Settings.autoWakeEnabled) and the target is a saved
-    // host with a learned MAC that ISN'T currently advertising (asleep/off, or just missing from
+    // host with a learned MAC that ISN'T currently advertising, fire a wake packet and DIAL
-    // mDNS), wake it and WAIT for it to reappear on mDNS (WakeController shows the "Waking…" overlay)
+    // IMMEDIATELY — mDNS absence does NOT mean unreachable (a host reached over a routed network —
-    // before dialing — discovery stays running meanwhile so we can see it come back. A fire-and-forget
+    // Tailscale/VPN/another subnet — is mDNS-blind forever, and gating the dial on presence bricked
-    // packet + the connect timeout wasn't enough for a cold boot. Otherwise (auto-wake off, no MAC, or
+    // exactly those reconnects). A genuinely-asleep box is already booting while the dial times out;
-    // already seen live) dial straight through.
+    // only a FAILED dial falls into the wake-and-WAIT-for-mDNS flow (WakeController's "Waking…"
+    // overlay), which redials once the host reappears. Otherwise (auto-wake off, no MAC, or already
+    // seen live) dial straight through.
     fun doConnect(targetHost: String, targetPort: Int, name: String, pinHex: String?) {
         if (identity == null) {
             status = "Identity not ready yet — try again in a moment"
@@ -232,6 +315,9 @@ fun ConnectScreen(
             if (kh != null) discovered.firstOrNull { kh.matches(it) }
             else discovered.firstOrNull { it.host == targetHost && it.port == targetPort }
         if (settings.autoWakeEnabled && macs.isNotEmpty() && liveAdvert() == null) {
+            // Fire-and-forget first packet (harmless if it's awake), then dial-first.
+            scope.launch(Dispatchers.IO) { NativeBridge.nativeWakeOnLan(macs.joinToString(","), targetHost) }
+            doConnectDirect(targetHost, targetPort, name, pinHex, onFailure = {
                 waker.start(
                     hostName = name,
                     connectsAfter = true,
@@ -240,8 +326,9 @@ fun ConnectScreen(
                     isOnline = { liveAdvert() != null },
                     onOnline = {
                         val live = liveAdvert()
-                    // Woke back on a new address? Re-key the saved record so it (and future connects)
+                        // Woke back on a new address? Re-key the saved record so it (and future
-                    // point at the live one, then dial there.
+                        // connects) point at the live one, then dial there (no fallback on this
+                        // redial — a second failure surfaces as the plain error).
                         if (live != null && kh != null && (live.host != kh.address || live.port != kh.port)) {
                             knownHostStore.update(kh.address, kh.port, kh.copy(address = live.host, port = live.port))
                             savedHosts = knownHostStore.all()
@@ -249,6 +336,7 @@ fun ConnectScreen(
                         doConnectDirect(live?.host ?: targetHost, live?.port ?: targetPort, name, pinHex)
                     },
                 )
+            })
         } else {
             doConnectDirect(targetHost, targetPort, name, pinHex)
         }
@@ -311,6 +399,12 @@ fun ConnectScreen(
         dh: DiscoveredHost? = null,
         manualName: String? = null,
     ) {
+        // Every dial/pair path funnels through here — with local network access denied the connect
+        // can only EPERM its way to a 10 s timeout, so ask instead of pretending to try.
+        if (!lnpGranted) {
+            lnpPrompt = true
+            return
+        }
         val known = knownHostStore.get(targetHost, targetPort)
         val adv = dh?.fingerprint?.lowercase()
         // Label precedence: a saved host keeps its (possibly user-renamed) name; else the discovered
@@ -347,7 +441,7 @@ fun ConnectScreen(
                         title = kh.name,
                         subtitle = "${kh.address}:${kh.port}",
                         filled = true,
-                        online = discovered.any { it.host == kh.address && it.port == kh.port },
+                        online = kh.isOnline(discovered, reachable),
                         paired = kh.paired,
                         knownHost = kh,
                         activate = { connect(kh.address, kh.port) },
@@ -384,7 +478,8 @@ fun ConnectScreen(
             // handle — the touch grid guards the same way with enabled=!connecting), or while the whole
             // console home is cross-fading out.
             navActive = navGate && !connecting && !showManualSheet && pendingTrust == null &&
-                awaiting == null && editTarget == null && optionsTarget == null && waker.waking == null,
+                awaiting == null && editTarget == null && optionsTarget == null &&
+                waker.waking == null && !lnpPrompt,
             onActivate = { it.activate() },
             onOpenLibrary = { it.knownHost?.let(onOpenLibrary) },
             onOpenSettings = onOpenSettings,
@@ -451,6 +546,38 @@ fun ConnectScreen(
                 }
             }
 
+            if (!lnpGranted) {
+                // Local network access denied: discovery can't ever find anything and every connect
+                // would time out — say so at the top, with the fix one tap away, instead of letting
+                // the screen look idle/broken.
+                item(span = { GridItemSpan(maxLineSpan) }) {
+                    Surface(
+                        color = MaterialTheme.colorScheme.errorContainer,
+                        shape = MaterialTheme.shapes.medium,
+                        modifier = Modifier.fillMaxWidth(),
+                    ) {
+                        Column(
+                            Modifier.padding(horizontal = 16.dp, vertical = 12.dp),
+                            horizontalAlignment = Alignment.CenterHorizontally,
+                        ) {
+                            Text(
+                                "Local network access is off",
+                                style = MaterialTheme.typography.titleSmall,
+                                color = MaterialTheme.colorScheme.onErrorContainer,
+                            )
+                            Text(
+                                "Android blocks punktfunk from finding or reaching hosts until you allow it.",
+                                style = MaterialTheme.typography.bodyMedium,
+                                color = MaterialTheme.colorScheme.onErrorContainer,
+                                textAlign = TextAlign.Center,
+                            )
+                            TextButton(onClick = { lnpPrompt = true }) { Text("Allow…") }
+                        }
+                    }
+                    Spacer(Modifier.height(12.dp))
+                }
+            }
+
             if (savedHosts.isEmpty() && discoveredUnsaved.isEmpty()) {
                 item(span = { GridItemSpan(maxLineSpan) }) {
                     EmptyHostsState()
@@ -466,6 +593,7 @@ fun ConnectScreen(
                         name = kh.name,
                         address = "${kh.address}:${kh.port}",
                         status = if (kh.paired) HostStatus.PAIRED else HostStatus.TOFU,
+                        online = kh.isOnline(discovered, reachable),
                         enabled = !connecting,
                         onConnect = { connect(kh.address, kh.port) },
                         onForget = {
@@ -477,8 +605,12 @@ fun ConnectScreen(
                         // through the WakeController so it shows the "Waking…" overlay and waits for
                         // the host to come online (matched by fingerprint, so a new DHCP address on a
                         // cold boot still counts as "up") rather than firing a single silent packet.
-                        onWake = if (kh.mac.isNotEmpty() && discovered.none { kh.matches(it) }) {
+                        onWake = if (kh.mac.isNotEmpty() && !kh.isOnline(discovered, reachable)) {
                             {
+                                // The magic packet is UDP broadcast — LNP-blocked like everything else.
+                                if (!lnpGranted) {
+                                    lnpPrompt = true
+                                } else {
                                     waker.start(
                                         hostName = kh.name,
                                         connectsAfter = false,
@@ -488,6 +620,7 @@ fun ConnectScreen(
                                         onOnline = {},
                                     )
                                 }
+                            }
                         } else {
                             null
                         },
@@ -505,6 +638,7 @@ fun ConnectScreen(
                         name = dh.name,
                         address = "${dh.host}:${dh.port}",
                         status = if (dh.pairingRequired) HostStatus.PAIRING else HostStatus.TOFU,
+                        online = true, // in the discovered list ⇒ live on mDNS right now
                         enabled = !connecting,
                         onConnect = { connect(dh.host, dh.port, dh) },
                         onForget = null,
@@ -514,8 +648,10 @@ fun ConnectScreen(
 
             // Active-discovery hint: discovery runs whenever this screen is up, so while it's
             // scanning but nothing's turned up yet (and we're not mid-connect), show it's working
-            // rather than looking idle/empty.
+            // rather than looking idle/empty. Suppressed while local network access is denied —
-            if (!connecting && discovered.isEmpty()) {
+            // a spinner would be a lie there (the browse can't receive anything); the banner above
+            // owns that state.
+            if (lnpGranted && !connecting && discovered.isEmpty()) {
                 item(span = { GridItemSpan(maxLineSpan) }) {
                     Row(
                         modifier = Modifier.fillMaxWidth().padding(vertical = 12.dp),
@@ -615,17 +751,22 @@ fun ConnectScreen(
 
     // Console host options (Up on a saved carousel tile): Wake / Edit / Forget.
     optionsTarget?.let { kh ->
-        val offline = discovered.none { kh.matches(it) }
+        val offline = !kh.isOnline(discovered, reachable)
         GamepadHostOptionsDialog(
             hostName = kh.name,
             canWake = kh.mac.isNotEmpty() && offline,
             onWake = {
                 optionsTarget = null
+                // The magic packet is UDP broadcast — LNP-blocked like everything else.
+                if (!lnpGranted) {
+                    lnpPrompt = true
+                } else {
                     waker.start(
                         hostName = kh.name, connectsAfter = false, macs = kh.mac, lastIp = kh.address,
                         isOnline = { discovered.any { kh.matches(it) } },
                         onOnline = {},
                     )
+                }
             },
             // A saved host always has a library (it's a knownHost) → offer it when the setting's on,
             // so a TV remote reaches the library here instead of via the Y face button.
@@ -673,6 +814,29 @@ fun ConnectScreen(
         }
     }
 
+    if (lnpPrompt) {
+        // Android 17+ local-network-permission rationale: re-request (a permanently-denied request
+        // returns instantly without a system prompt — hence the settings deep link alongside).
+        val onAllow = {
+            lnpPrompt = false
+            localNetLauncher.launch(Manifest.permission.ACCESS_LOCAL_NETWORK)
+        }
+        val onSettings = {
+            lnpPrompt = false
+            context.startActivity(
+                Intent(
+                    android.provider.Settings.ACTION_APPLICATION_DETAILS_SETTINGS,
+                    Uri.fromParts("package", context.packageName, null),
+                ),
+            )
+        }
+        if (gamepadUi) {
+            GamepadLocalNetworkDialog(onAllow = onAllow, onSettings = onSettings, onDismiss = { lnpPrompt = false })
+        } else {
+            LocalNetworkDialog(onAllow = onAllow, onSettings = onSettings, onDismiss = { lnpPrompt = false })
+        }
+    }
+
     // Topmost: the "Waking…" overlay rides over both the touch grid and the console home.
     WakeOverlay(waker, gamepadUi)
 }
@@ -687,6 +851,18 @@ fun hasNearbyPermission(context: Context): Boolean =
         ContextCompat.checkSelfPermission(context, Manifest.permission.NEARBY_WIFI_DEVICES) ==
         PackageManager.PERMISSION_GRANTED
 
+/**
+ * Whether ACCESS_LOCAL_NETWORK is held (API 37+; below, the permission doesn't exist and local
+ * network access is implicit). Android 17's Local Network Protection blocks ALL local-network
+ * traffic for apps targeting SDK 37 without this runtime grant: UDP sends fail with EPERM, so the
+ * QUIC dial surfaces as a silent handshake timeout and the mDNS browse receives nothing. Unlike
+ * [hasNearbyPermission] this is load-bearing — nothing on the connect screen works without it.
+ */
+fun hasLocalNetworkPermission(context: Context): Boolean =
+    Build.VERSION.SDK_INT < Build.VERSION_CODES.CINNAMON_BUN ||
+        ContextCompat.checkSelfPermission(context, Manifest.permission.ACCESS_LOCAL_NETWORK) ==
+        PackageManager.PERMISSION_GRANTED
+
 /**
  * True when a saved host and a discovered advert are the same machine — matched by certificate
  * fingerprint when both carry it (so it survives a DHCP address change), else by address:port.
@@ -697,3 +873,11 @@ private fun KnownHost.matches(dh: DiscoveredHost): Boolean {
     if (!advFp.isNullOrEmpty() && fpHex.isNotEmpty() && fpHex.lowercase() == advFp) return true
     return address == dh.host && port == dh.port
 }
+
+/**
+ * True when a saved host is reachable RIGHT NOW: advertising on mDNS OR answering the QUIC probe
+ * (a host reached over a routed network — Tailscale/VPN — never advertises but is reachable). The
+ * display-side companion to dial-first: presence no longer means "on this LAN".
+ */
+private fun KnownHost.isOnline(discovered: List<DiscoveredHost>, reachable: Set<String>): Boolean =
+    discovered.any { matches(it) } || reachable.contains("$address:$port")

clients/android/app/src/main/kotlin/io/unom/punktfunk/GamepadDialogs.kt

@@ -229,6 +229,29 @@ fun GamepadHostOptionsDialog(
     }
 }
 
+/** Console counterpart of [LocalNetworkDialog] — the Android 17+ ACCESS_LOCAL_NETWORK rationale. */
+@Composable
+fun GamepadLocalNetworkDialog(onAllow: () -> Unit, onSettings: () -> Unit, onDismiss: () -> Unit) {
+    GamepadDialog(
+        title = "Allow local network access",
+        onDismiss = onDismiss,
+        actions = listOf(
+            DialogAction("Allow", primary = true, onClick = onAllow),
+            DialogAction("Open settings", onClick = onSettings),
+            DialogAction("Not now", onClick = onDismiss),
+        ),
+    ) {
+        DialogText(
+            "Android blocks punktfunk from talking to devices on your network, so it can't find " +
+                "or reach any host until you allow it.",
+        )
+        DialogText(
+            "If no prompt appears after Allow, enable “Nearby devices” for punktfunk in " +
+                "system settings.",
+        )
+    }
+}
+
 @Composable
 fun GamepadTrustNewDialog(pt: PendingTrust, onTrust: () -> Unit, onPairInstead: () -> Unit, onDismiss: () -> Unit) {
     GamepadDialog(

clients/android/app/src/main/kotlin/io/unom/punktfunk/GamepadSettingsScreen.kt

@@ -327,7 +327,7 @@ private fun buildSettingsRows(s: Settings, update: (Settings) -> Unit): List<GpR
         ) { update(s.copy(hdrEnabled = it)) },
         toggle(
             "lowLatency", null, "Low-latency mode",
-            "Experimental — aggressive decoder and system tuning. Turn off if the stream stutters or glitches.",
+            "The fast pipeline (async decode + system tuning). On by default — turn off to fall back if the stream stutters or glitches.",
             s.lowLatencyMode,
         ) { update(s.copy(lowLatencyMode = it)) },
 
@@ -346,11 +346,12 @@ private fun buildSettingsRows(s: Settings, update: (Settings) -> Unit): List<GpR
             GAMEPAD_OPTIONS.mapIndexed { i, lbl -> i to lbl }, s.gamepad,
         ) { update(s.copy(gamepad = it)) },
 
-        toggle(
+        choice(
             "hud", "Interface", "Statistics overlay",
-            "Show FPS, throughput and latency while streaming.",
+            "How much the overlay shows: Compact (one line) → Normal → Detailed (full HUD). " +
-            s.statsHudEnabled,
+                "A 3-finger tap cycles the tiers live.",
-        ) { update(s.copy(statsHudEnabled = it)) },
+            STATS_VERBOSITY_OPTIONS, s.statsVerbosity,
+        ) { update(s.copy(statsVerbosity = it)) },
         toggle(
             "library", null, "Game library",
             "Browse a paired host's games with Y (experimental).",

clients/android/app/src/main/kotlin/io/unom/punktfunk/HostConnect.kt

@@ -3,6 +3,7 @@ package io.unom.punktfunk
 import android.content.Context
 import io.unom.punktfunk.kit.Gamepad
 import io.unom.punktfunk.kit.NativeBridge
+import io.unom.punktfunk.kit.VideoDecoders
 import io.unom.punktfunk.kit.security.ClientIdentity
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
@@ -41,7 +42,10 @@ suspend fun connectToHost(
             host, port, w, h, hz,
             identity.certPem, identity.privateKeyPem, pinHex,
             settings.bitrateKbps, settings.compositor, gamepadPref,
-            hdrEnabled, settings.audioChannels, settings.preferredCodec(), timeoutMs,
+            hdrEnabled, settings.audioChannels,
+            // What this device can decode (H.264|HEVC always, AV1 when a real decoder exists) +
+            // the user's soft codec preference — the host resolves the emitted codec from both.
+            VideoDecoders.decodableCodecBits(), settings.preferredCodec(), timeoutMs,
             launch,
         )
     }

clients/android/app/src/main/kotlin/io/unom/punktfunk/Settings.kt

@@ -26,12 +26,18 @@ data class Settings(
     /** Requested audio channel count: 2 (stereo), 6 (5.1) or 8 (7.1). The host clamps to what it
      * can capture; the resolved count drives the decoder + AAudio layout. */
     val audioChannels: Int = 2,
-    /** Preferred video codec: `"auto"` (host decides), `"hevc"`, or `"h264"`. A soft preference — the
+    /** Preferred video codec: `"auto"` (host decides), `"hevc"`, `"h264"`, or `"av1"`. A soft
-     * host emits it when it can, else falls back. AMediaCodec decodes whichever the host resolves. */
+     * preference — the host emits it when it can, else falls back. AMediaCodec decodes whichever
+     * the host resolves (AV1 is only advertised/offered when the device has a real AV1 decoder). */
     val codec: String = "auto",
     val micEnabled: Boolean = false,
-    /** Show the live stats overlay (FPS / throughput / latency) during a stream. */
+    /**
-    val statsHudEnabled: Boolean = true,
+     * How much the in-stream stats overlay shows — see [StatsVerbosity]. Defaults to
+     * [StatsVerbosity.NORMAL] (the res/fps line + latency headline + reliability counters); the full
+     * decoder/feed/equation HUD is [StatsVerbosity.DETAILED], and a single terse line is
+     * [StatsVerbosity.COMPACT]. A 3-finger tap cycles through the tiers live.
+     */
+    val statsVerbosity: StatsVerbosity = StatsVerbosity.NORMAL,
     /**
      * Touch input model — how touchscreen fingers drive the host. [TouchMode.TRACKPAD] (default):
      * the cursor stays put on touch-down and moves by the finger's relative delta (swipe to nudge,
@@ -55,14 +61,18 @@ data class Settings(
      */
     val libraryEnabled: Boolean = true,
     /**
-     * "Low-latency mode (experimental)" — the master switch over the latency overhaul: decoder
+     * "Low-latency mode" — the master switch over the latency pipeline: the async decode loop
-     * ranking + per-SoC vendor keys + the async decode loop (native), pipeline thread boosts + ADPF
+     * (native; burst-feed + present-newest-per-vsync, the Apple client's discipline), decoder ranking
-     * max-performance, game-tagged AAudio, DSCP marking on the media sockets, HDMI ALLM, and the
+     * + per-SoC vendor keys, pipeline thread boosts + ADPF max-performance, game-tagged AAudio, DSCP
-     * forced TV mode switch. (The Wi-Fi locks are NOT part of this — both are always held while
+     * marking on the media sockets, HDMI ALLM, and the forced TV mode switch. (The Wi-Fi locks are NOT
-     * streaming; see StreamScreen.) Off (default): the original decode pipeline, kept as the
+     * part of this — both are always held while streaming; see StreamScreen.) On (default): the fast
-     * known-good baseline until the aggressive stack is proven per-device.
+     * pipeline. Off restores the original synchronous decode loop byte-for-byte, kept as a per-device
+     * escape hatch. Promoted to default once the receive-side latency ratchet the overhaul interacted
+     * badly with was fixed in the shared core — the pump now jumps to live on a standing backlog
+     * instead of accumulating it (see `punktfunk-core` `FrameChannel`), so the async loop no longer
+     * feeds a queue that only grows.
      */
-    val lowLatencyMode: Boolean = false,
+    val lowLatencyMode: Boolean = true,
     /**
      * Wake-on-LAN a saved host before connecting when it isn't currently seen on mDNS. On (default):
      * a connect to a host with a learned MAC that isn't advertising sends a magic packet and waits
@@ -77,6 +87,27 @@ data class Settings(
 /** [Settings.touchMode] values; persisted by name. */
 enum class TouchMode { TRACKPAD, POINTER, TOUCH }
 
+/**
+ * Stats-overlay detail tiers, in cycling order (persisted by name). Each tier is a strict superset
+ * of the previous one, so toning down never hides a number a lower tier keeps:
+ * - [OFF] — no overlay (and native sampling is gated off, one atomic load per frame).
+ * - [COMPACT] — one line: `fps · end-to-end ms · Mb/s` (+ a loss flag when frames drop).
+ * - [NORMAL] — adds the resolution/refresh line, the end-to-end p50/p95 headline, and the
+ *   reliability counters (lost / skipped / FEC) when nonzero. The default.
+ * - [DETAILED] — the full HUD: also the decoder label, the video-feed descriptor, and the
+ *   `host+network + decode` stage equation.
+ * A 3-finger tap in-stream cycles Off → Compact → Normal → Detailed → Off (see [next]).
+ */
+enum class StatsVerbosity(val label: String) {
+    OFF("Off"),
+    COMPACT("Compact"),
+    NORMAL("Normal"),
+    DETAILED("Detailed");
+
+    /** The next tier for the live 3-finger-tap cycle (wraps Detailed → Off). */
+    fun next(): StatsVerbosity = entries[(ordinal + 1) % entries.size]
+}
+
 /** Loads/saves [Settings] in the app-private `punktfunk_settings` prefs. */
 class SettingsStore(context: Context) {
     private val prefs =
@@ -93,14 +124,23 @@ class SettingsStore(context: Context) {
         audioChannels = prefs.getInt(K_AUDIO_CH, 2),
         codec = prefs.getString(K_CODEC, "auto") ?: "auto",
         micEnabled = prefs.getBoolean(K_MIC, false),
-        statsHudEnabled = prefs.getBoolean(K_HUD, true),
+        statsVerbosity = prefs.getString(K_STATS_VERBOSITY, null)
+            ?.let { name -> StatsVerbosity.entries.firstOrNull { it.name == name } }
+            // Migration from the pre-tier Boolean "stats_hud_enabled": an explicit OFF stays off;
+            // everyone else (incl. fresh installs) lands on NORMAL — the old always-full HUD toned
+            // down to the new default, which is the whole point of adding tiers.
+            ?: if (prefs.contains(K_HUD) && !prefs.getBoolean(K_HUD, true)) {
+                StatsVerbosity.OFF
+            } else {
+                StatsVerbosity.NORMAL
+            },
         touchMode = prefs.getString(K_TOUCH_MODE, null)
             ?.let { name -> TouchMode.entries.firstOrNull { it.name == name } }
             // Migration: the pre-enum Boolean "trackpad_mode" (true = trackpad, false = direct).
             ?: if (prefs.getBoolean(K_TRACKPAD, true)) TouchMode.TRACKPAD else TouchMode.POINTER,
         gamepadUiEnabled = prefs.getBoolean(K_GAMEPAD_UI, true),
         libraryEnabled = prefs.getBoolean(K_LIBRARY, true),
-        lowLatencyMode = prefs.getBoolean(K_LOW_LATENCY, false),
+        lowLatencyMode = prefs.getBoolean(K_LOW_LATENCY, true),
         autoWakeEnabled = prefs.getBoolean(K_AUTO_WAKE, true),
     )
 
@@ -116,7 +156,7 @@ class SettingsStore(context: Context) {
             .putInt(K_AUDIO_CH, s.audioChannels)
             .putString(K_CODEC, s.codec)
             .putBoolean(K_MIC, s.micEnabled)
-            .putBoolean(K_HUD, s.statsHudEnabled)
+            .putString(K_STATS_VERBOSITY, s.statsVerbosity.name)
             .putString(K_TOUCH_MODE, s.touchMode.name)
             .putBoolean(K_GAMEPAD_UI, s.gamepadUiEnabled)
             .putBoolean(K_LIBRARY, s.libraryEnabled)
@@ -136,18 +176,26 @@ class SettingsStore(context: Context) {
         const val K_AUDIO_CH = "audio_channels"
         const val K_CODEC = "codec"
         const val K_MIC = "mic_enabled"
+        const val K_STATS_VERBOSITY = "stats_verbosity"
+
+        /** Pre-tier Boolean the [K_STATS_VERBOSITY] enum replaced — read once for migration, never
+         * written. */
         const val K_HUD = "stats_hud_enabled"
         const val K_TOUCH_MODE = "touch_mode"
         const val K_GAMEPAD_UI = "gamepad_ui_enabled"
         const val K_LIBRARY = "library_enabled"
 
         /**
-         * Deliberately NOT the original `"low_latency_mode"` key: that one shipped default-ON, so
+         * Bumped AGAIN to restart every install at the new default (ON). History: the original
-         * any install that ever saved settings persisted `true` — under the old key, flipping the
+         * `"low_latency_mode"` shipped default-ON; `"low_latency_mode_experimental"` restarted
-         * default to off would leave exactly the regressed devices stuck on the overhaul. The fresh
+         * everyone at OFF after the overhaul regressed on some phones. That regression was the
-         * key restarts everyone at the safe default; the stale one is abandoned unread.
+         * receive-side latency ratchet the async loop fed (a standing queue that only grew) — now
+         * fixed in the shared core (`punktfunk-core` `FrameChannel`: the pump jumps to live on a
+         * standing backlog instead of accumulating it), so the fast pipeline is the default again. A
+         * fresh key re-defaults every install — including ones persisted OFF under the old key — to
+         * on; both stale keys are abandoned unread. The toggle stays as a per-device escape hatch.
          */
-        const val K_LOW_LATENCY = "low_latency_mode_experimental"
+        const val K_LOW_LATENCY = "low_latency_mode_v2"
         const val K_AUTO_WAKE = "auto_wake_enabled"
 
         /** Legacy Boolean the enum replaced — read once as the migration default, never written. */
@@ -224,14 +272,17 @@ val AUDIO_CHANNEL_OPTIONS = listOf(
     8 to "7.1 Surround",
 )
 
-/** (stored value, label) for the preferred video codec. `"auto"` = host decides. */
+/** (stored value, label) for the preferred video codec. `"auto"` = host decides. The `"av1"` row
+ * only makes sense on a device with a real AV1 decoder — SettingsScreen filters it out otherwise. */
 val CODEC_OPTIONS = listOf(
     "auto" to "Automatic",
     "hevc" to "HEVC (H.265)",
     "h264" to "H.264 (AVC)",
+    "av1" to "AV1",
 )
 
-/** The [Settings.codec] string as a `quic::CODEC_*` preference byte (`0` = auto). H264=1, HEVC=2. */
+/** The [Settings.codec] string as a `quic::CODEC_*` preference byte (`0` = auto). H264=1, HEVC=2,
+ * AV1=4. */
 fun Settings.preferredCodec(): Int = when (codec) {
     "h264" -> 1
     "hevc" -> 2
@@ -261,6 +312,9 @@ val COMPOSITOR_OPTIONS = listOf(
     "gamescope",
 )
 
+/** (verbosity, label) for the stats-overlay detail picker. Order = the live 3-finger-tap cycle. */
+val STATS_VERBOSITY_OPTIONS = StatsVerbosity.entries.map { it to it.label }
+
 /** (mode, label) for the touch-input model. */
 val TOUCH_MODE_OPTIONS = listOf(
     TouchMode.TRACKPAD to "Trackpad",

clients/android/app/src/main/kotlin/io/unom/punktfunk/SettingsScreen.kt

@@ -65,6 +65,7 @@ import androidx.compose.ui.graphics.vector.ImageVector
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.unit.dp
 import androidx.core.content.ContextCompat
+import io.unom.punktfunk.kit.VideoDecoders
 
 /**
  * Stream settings, organised as an iOS-Settings / Android-system-settings style list of category
@@ -300,7 +301,12 @@ private fun DisplaySettings(s: Settings, update: (Settings) -> Unit, context: an
             update(s.copy(bitrateKbps = kbps))
         }
 
-        SettingDropdown(label = "Video codec", options = CODEC_OPTIONS, selected = s.codec) { c ->
+        // AV1 is only offered when the device has a real AV1 decoder (it's never advertised to the
+        // host otherwise, so preferring it would be a dead setting). A stored "av1" from a capable
+        // device stays visible so the selection is always representable.
+        val av1Capable = remember { VideoDecoders.pickDecoder("video/av01") != null }
+        val codecOptions = CODEC_OPTIONS.filter { (v, _) -> v != "av1" || av1Capable || s.codec == "av1" }
+        SettingDropdown(label = "Video codec", options = codecOptions, selected = s.codec) { c ->
             update(s.copy(codec = c))
         }
 
@@ -326,10 +332,10 @@ private fun DisplaySettings(s: Settings, update: (Settings) -> Unit, context: an
         ) { c -> update(s.copy(compositor = c)) }
 
         ToggleRow(
-            title = "Low-latency mode (experimental)",
+            title = "Low-latency mode",
-            subtitle = "Aggressive decoder and system tuning (per-device decoder selection, async " +
+            subtitle = "The fast pipeline (async decode, per-device decoder selection, HDMI game " +
-                "decode, HDMI game mode). Can lower latency, but may stutter or glitch on " +
+                "mode). On by default — turn off to fall back to the plain decode path if the stream " +
-                "some devices — turn off if the stream misbehaves.",
+                "stutters or glitches on this device.",
             checked = s.lowLatencyMode,
             onCheckedChange = { on -> update(s.copy(lowLatencyMode = on)) },
         )
@@ -403,11 +409,17 @@ private fun InterfaceSettings(s: Settings, update: (Settings) -> Unit) {
             checked = s.autoWakeEnabled,
             onCheckedChange = { on -> update(s.copy(autoWakeEnabled = on)) },
         )
-        ToggleRow(
+        SettingDropdown(
-            title = "Stats overlay",
+            label = "Stats overlay",
-            subtitle = "Show FPS, throughput and latency while streaming (3-finger tap toggles it live)",
+            options = STATS_VERBOSITY_OPTIONS,
-            checked = s.statsHudEnabled,
+            selected = s.statsVerbosity,
-            onCheckedChange = { on -> update(s.copy(statsHudEnabled = on)) },
+        ) { v -> update(s.copy(statsVerbosity = v)) }
+        Text(
+            "How much the in-stream overlay shows: Compact is a single fps · latency · bitrate " +
+                "line; Normal adds the resolution and reliability lines; Detailed adds the decoder, " +
+                "colour and latency-breakdown lines. A 3-finger tap cycles the tiers live.",
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
         )
     }
 }

clients/android/app/src/main/kotlin/io/unom/punktfunk/StatsOverlay.kt

@@ -15,87 +15,139 @@ import io.unom.punktfunk.kit.NativeBridge
 import kotlin.math.roundToInt
 
 /**
- * The live stats overlay — the unified HUD (`design/stats-unification.md`, Android v1: headline is
+ * The live stats overlay — the unified HUD (`design/stats-unification.md`): headline is
- * `capture→decoded`, tiled by `host+network` + `decode`). Reads the 18-double layout from
+ * `capture→displayed` tiled by `host+network` + `decode` + `display` when the platform delivered
- * [NativeBridge.nativeVideoStats]:
+ * OnFrameRendered render callbacks this window (`dispValid`), falling back to the v1
- * `[fps, mbps, e2eP50Ms, e2eP95Ms, latValid, skew, w, h, hz, lost, bitDepth, colorPrimaries,
+ * `capture→decoded` headline without the `display` term when it didn't. Reads the 26-double
- * colorTransfer, chromaFormatIdc, hostNetP50Ms, decodeP50Ms, hostP50Ms, netP50Ms]`. Indexes 10–13
+ * layout from [NativeBridge.nativeVideoStats]:
- * (present on a current native lib) describe the negotiated video feed and render as a
+ * `[fps, mbps, e2eP50Ms, e2eP95Ms, latValid, skew, w, h, hz, lostTotal, bitDepth, colorPrimaries,
- * codec/depth/colour/chroma line; 14/15 render as the stage equation — split into
+ * colorTransfer, chromaFormatIdc, hostNetP50Ms, decodeP50Ms, hostP50Ms, netP50Ms, lost, skipped,
- * `host + network + decode` when the Phase-2 terms at 16/17 are nonzero (a current host sends
+ * fec, frames, dispValid, displayP50Ms, e2eDispP50Ms, e2eDispP95Ms]`.
- * per-AU 0xCF timings; an old host leaves them 0 and the combined `host+network` term stands);
+ *
- * older layouts just omit those lines.
+ * [verbosity] selects how many lines render (each tier a superset of the last — see
+ * [StatsVerbosity]):
+ * - [StatsVerbosity.COMPACT] — one line, `fps · end-to-end ms · Mb/s` (+ a loss flag).
+ * - [StatsVerbosity.NORMAL] — the res/fps/Mb·s line, the end-to-end p50/p95 headline, and the
+ *   reliability counters (18–21) when nonzero.
+ * - [StatsVerbosity.DETAILED] — also the decoder label, the video-feed descriptor (10–13), and the
+ *   stage equation (14/15, split into `host + network` when the Phase-2 terms at 16/17 are nonzero).
+ * [StatsVerbosity.OFF] renders nothing. Older native layouts simply omit the lines they lack (the
+ * counter line falls back to the cumulative `lostTotal` at index 9 on a pre-window lib).
  */
 @Composable
-internal fun StatsOverlay(s: DoubleArray, decoderLabel: String = "", modifier: Modifier = Modifier) {
+internal fun StatsOverlay(
-    if (s.size < 10) return
+    s: DoubleArray,
+    verbosity: StatsVerbosity,
+    decoderLabel: String = "",
+    modifier: Modifier = Modifier,
+) {
+    if (verbosity == StatsVerbosity.OFF || s.size < 10) return
     val w = s[6].toInt()
     val h = s[7].toInt()
     val hz = s[8].toInt()
     val latValid = s[4] != 0.0
     val skew = s[5] != 0.0
     val lost = s[9].toLong()
+    val detailed = verbosity == StatsVerbosity.DETAILED
+
     Column(
         modifier = modifier
             .background(Color.Black.copy(alpha = 0.45f), RoundedCornerShape(6.dp))
             .padding(horizontal = 8.dp, vertical = 4.dp),
     ) {
-        Text(
+        // Compact: everything the glance-value needs on one line, nothing else.
-            "$w×$h@$hz   ${s[0].roundToInt()} fps   ${"%.1f".format(s[1])} Mb/s",
+        if (verbosity == StatsVerbosity.COMPACT) {
-            color = Color.White,
+            statLine(compactLine(s, latValid), Color.White)
-            fontFamily = FontFamily.Monospace,
+            return@Column
-            fontSize = 12.sp,
-        )
-        if (decoderLabel.isNotEmpty()) {
-            Text(
-                decoderLabel,
-                color = Color(0xFFB0D0FF),
-                fontFamily = FontFamily.Monospace,
-                fontSize = 12.sp,
-            )
         }
-        videoFeedLine(s)?.let { feed ->
+
-            Text(
+        statLine("$w×$h@$hz   ${s[0].roundToInt()} fps   ${"%.1f".format(s[1])} Mb/s", Color.White)
-                feed,
+        if (detailed && decoderLabel.isNotEmpty()) {
-                color = Color.White,
+            statLine(decoderLabel, Color(0xFFB0D0FF))
-                fontFamily = FontFamily.Monospace,
+        }
-                fontSize = 12.sp,
+        if (detailed) {
-            )
+            videoFeedLine(s)?.let { statLine(it, Color.White) }
         }
         if (latValid) {
+            // Display stage (s[22]–s[25], from OnFrameRendered): when a render timestamp landed
+            // this window the headline is the directly-measured capture→displayed pair and the
+            // equation gains its `display` term; otherwise (older lib / no callbacks) the endpoint
+            // honestly stays capture→decoded — the equation always tiles the headline interval.
+            val dispValid = s.size >= 26 && s[22] != 0.0
             val tag = if (skew) "" else " (same-host clock)"
-            Text(
+            val (p50, p95, endpoint) = if (dispValid) {
-                "end-to-end ${"%.1f".format(s[2])} ms p50 · ${"%.1f".format(s[3])} p95 · capture→decoded$tag",
+                Triple(s[24], s[25], "capture→displayed")
-                color = Color.White,
+            } else {
-                fontFamily = FontFamily.Monospace,
+                Triple(s[2], s[3], "capture→decoded")
-                fontSize = 12.sp,
+            }
+            statLine(
+                "end-to-end ${"%.1f".format(p50)} ms p50 · ${"%.1f".format(p95)} p95 · $endpoint$tag",
+                Color.White,
             )
-            if (s.size >= 16) {
+            if (detailed && s.size >= 16) {
                 // Phase-2 split (s[16]/s[17]): render `host + network` separately when the host
                 // reported its share this window; otherwise the combined term (old host / no
                 // matched 0xCF timing).
-                val equation = if (s.size >= 18 && s[16] > 0) {
+                val hostTerms = if (s.size >= 18 && s[16] > 0) {
-                    "= host ${"%.1f".format(s[16])} + network ${"%.1f".format(s[17])} + decode ${"%.1f".format(s[15])}"
+                    "host ${"%.1f".format(s[16])} + network ${"%.1f".format(s[17])}"
                 } else {
-                    "= host+network ${"%.1f".format(s[14])} + decode ${"%.1f".format(s[15])}"
+                    "host+network ${"%.1f".format(s[14])}"
                 }
-                Text(
+                val displayTerm = if (dispValid) " + display ${"%.1f".format(s[23])}" else ""
-                    equation,
+                statLine("= $hostTerms + decode ${"%.1f".format(s[15])}$displayTerm", Color.White)
-                    color = Color.White,
-                    fontFamily = FontFamily.Monospace,
-                    fontSize = 12.sp,
-                )
             }
         }
+        counterLine(s, lost)?.let { statLine(it, Color(0xFFFFB0B0)) }
+    }
+}
+
+/** One monospace HUD line — the shared type ramp so every tier's rows line up. */
+@Composable
+private fun statLine(text: String, color: Color) {
+    Text(text, color = color, fontFamily = FontFamily.Monospace, fontSize = 12.sp)
+}
+
+/**
+ * The single [StatsVerbosity.COMPACT] line: `238 fps · 1.3 ms · 921 Mb/s`. The end-to-end p50 term
+ * is dropped when no in-range latency sample landed (`latValid` false), and a loss flag
+ * `· ⚠ lost {n}` is appended when the window (or, on an old lib, the session) dropped frames — the
+ * one reliability signal worth surfacing even at the tersest tier.
+ */
+private fun compactLine(s: DoubleArray, latValid: Boolean): String {
+    // Prefer the capture→displayed end-to-end (s[24]) when a render timestamp landed this window.
+    val e2eP50 = if (s.size >= 26 && s[22] != 0.0) s[24] else s[2]
+    val parts = buildList {
+        add("${s[0].roundToInt()} fps")
+        if (latValid) add("${"%.1f".format(e2eP50)} ms")
+        add("${s[1].roundToInt()} Mb/s")
+    }
+    val lostWindow = if (s.size >= 22) s[18].toLong() else s[9].toLong()
+    val suffix = if (lostWindow > 0) "   ⚠ lost $lostWindow" else ""
+    return parts.joinToString(" · ") + suffix
+}
+
+/**
+ * Format the spec's line-4 counters from the per-window doubles at 18–21 —
+ * `lost {n} ({pct}%) · skipped {m} · FEC {k}`, each term only when nonzero, the whole line `null`
+ * when all are zero (spec: "only rendered when any value is nonzero"). `pct = lost/(frames+lost)`
+ * (the received count rides at index 21). A pre-window layout (< 22 doubles) falls back to the
+ * session-cumulative `lostTotal` so an older native lib still reports loss.
+ */
+private fun counterLine(s: DoubleArray, lostTotal: Long): String? {
+    if (s.size < 22) return if (lostTotal > 0) "lost $lostTotal" else null
+    val lost = s[18].toLong()
+    val skipped = s[19].toLong()
+    val fec = s[20].toLong()
+    val frames = s[21].toLong()
+    if (lost == 0L && skipped == 0L && fec == 0L) return null
+    return buildList {
         if (lost > 0) {
-            Text(
+            val pct = 100.0 * lost / (frames + lost).coerceAtLeast(1)
-                "lost $lost",
+            add("lost $lost (${"%.1f".format(pct)}%)")
-                color = Color(0xFFFFB0B0),
-                fontFamily = FontFamily.Monospace,
-                fontSize = 12.sp,
-            )
-        }
         }
+        if (skipped > 0) add("skipped $skipped")
+        if (fec > 0) add("FEC $fec")
+    }.joinToString(" · ")
 }
 
 /**

clients/android/app/src/main/kotlin/io/unom/punktfunk/StreamScreen.kt

@@ -54,28 +54,32 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
         Manifest.permission.RECORD_AUDIO,
     ) == PackageManager.PERMISSION_GRANTED
 
-    // Live decode stats for the HUD. `showStats` gates the whole pipeline: the native per-frame
+    // Live decode stats for the HUD. `statsOn` (verbosity != OFF) gates the whole native pipeline:
-    // sampling (nativeSetVideoStatsEnabled — hidden HUD costs one atomic load per frame) AND the
+    // the per-frame sampling (nativeSetVideoStatsEnabled — a hidden HUD costs one atomic load per
-    // 1 s poll loop, which only runs while the overlay is visible. Enabling resets the native
+    // frame) AND the 1 s poll loop, which only runs while the overlay is visible. Enabling resets
-    // window, so re-showing never renders stale data. A 3-finger tap toggles it live; the default
+    // the native window, so re-showing never renders stale data. A 3-finger tap cycles the
-    // comes from Settings.
+    // verbosity tier live (Off → Compact → Normal → Detailed → Off); the default comes from
+    // Settings. The tier only changes how many lines `StatsOverlay` draws — switching between the
+    // visible tiers keeps sampling running (the effect keys on `statsOn`, not the tier) so it never
+    // blanks the numbers for a poll interval.
     val initialSettings = remember { SettingsStore(context).load() }
     var stats by remember { mutableStateOf<DoubleArray?>(null) }
     var decoderLabel by remember { mutableStateOf("") }
-    var showStats by remember { mutableStateOf(initialSettings.statsHudEnabled) }
+    var statsVerbosity by remember { mutableStateOf(initialSettings.statsVerbosity) }
+    val statsOn = statsVerbosity != StatsVerbosity.OFF
     // Touch model is fixed per session (re-keys the gesture handler below if it ever changes).
     val touchMode = initialSettings.touchMode
-    // "Low-latency mode (experimental)" master toggle, resolved once for the session. Off (the
+    // "Low-latency mode" master toggle, resolved once for the session. On (the default) enables the
-    // default) runs the original decode pipeline; on enables the aggressive stack — decoder
+    // fast pipeline — decoder ranking + vendor keys + async loop (native side), HDMI ALLM below,
-    // ranking + vendor keys + async loop (native side), HDMI ALLM below, game-tagged audio, and
+    // game-tagged audio, and DSCP marking (applied earlier, at connect); off falls back to the
-    // DSCP marking (applied earlier, at connect).
+    // original synchronous decode pipeline as a per-device escape hatch.
     val lowLatencyMode = initialSettings.lowLatencyMode
     // TV form factor (leanback): the decoder actively switches the HDMI output mode to the stream
     // refresh; a phone/tablet gets the softer seamless frame-rate hint instead.
     val isTv = remember { context.packageManager.hasSystemFeature(PackageManager.FEATURE_LEANBACK) }
-    LaunchedEffect(handle, showStats) {
+    LaunchedEffect(handle, statsOn) {
-        NativeBridge.nativeSetVideoStatsEnabled(handle, showStats)
+        NativeBridge.nativeSetVideoStatsEnabled(handle, statsOn)
-        if (showStats) {
+        if (statsOn) {
             while (true) {
                 delay(1000)
                 stats = NativeBridge.nativeVideoStats(handle)
@@ -250,8 +254,10 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
         )
         // Live stats HUD (FPS / throughput / capture→client latency), drawn over the video but
         // BEFORE the transparent gesture layer below, so it shows through and never eats touches.
-        if (showStats) {
+        if (statsOn) {
-            stats?.let { StatsOverlay(it, decoderLabel, Modifier.align(Alignment.TopStart).padding(12.dp)) }
+            stats?.let {
+                StatsOverlay(it, statsVerbosity, decoderLabel, Modifier.align(Alignment.TopStart).padding(12.dp))
+            }
         }
         // Touch input per the Settings model: trackpad/direct-pointer mouse (the shared gesture
         // vocabulary) or real multi-touch passthrough — see TouchInput.kt.
@@ -262,7 +268,7 @@ fun StreamScreen(handle: Long, micEnabled: Boolean, onDisconnect: () -> Unit) {
                     else -> streamTouchInput(
                         handle,
                         trackpad = touchMode == TouchMode.TRACKPAD,
-                        onToggleStats = { showStats = !showStats },
+                        onCycleStats = { statsVerbosity = statsVerbosity.next() },
                     )
                 }
             },

clients/android/app/src/main/kotlin/io/unom/punktfunk/TouchInput.kt

@@ -40,7 +40,7 @@ private const val ACCEL_MAX = 3.0f
  *
  * Both share the same gesture vocabulary: tap = left click; two-finger tap = right click;
  * two-finger drag = scroll; tap-then-press-and-drag = left-drag (text selection / moving
- * windows); three-finger tap = [onToggleStats] (the stats HUD).
+ * windows); three-finger tap = [onCycleStats] (cycle the stats-HUD verbosity tier).
  */
 /**
  * Real multi-touch passthrough ([TouchMode.TOUCH]): every finger forwards as a host touchscreen
@@ -93,7 +93,7 @@ internal suspend fun PointerInputScope.streamTouchPassthrough(handle: Long) {
 internal suspend fun PointerInputScope.streamTouchInput(
     handle: Long,
     trackpad: Boolean,
-    onToggleStats: () -> Unit,
+    onCycleStats: () -> Unit,
 ) {
     var lastTapUp = 0L
     var lastTapX = 0f
@@ -218,7 +218,7 @@ internal suspend fun PointerInputScope.streamTouchInput(
             NativeBridge.nativeSendPointerButton(handle, 1, false) // end the drag
         } else if (!moved) {
             when {
-                maxFingers >= 3 -> onToggleStats() // in-stream HUD toggle
+                maxFingers >= 3 -> onCycleStats() // in-stream HUD verbosity cycle
                 maxFingers == 2 -> { // two-finger tap → right click
                     NativeBridge.nativeSendPointerButton(handle, 3, true)
                     NativeBridge.nativeSendPointerButton(handle, 3, false)

clients/android/app/src/main/kotlin/io/unom/punktfunk/components/HostComponents.kt

@@ -2,6 +2,7 @@ package io.unom.punktfunk.components
 
 import androidx.compose.foundation.background
 import androidx.compose.foundation.border
+import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Box
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -56,6 +57,7 @@ fun HostCard(
     name: String,
     address: String,
     status: HostStatus,
+    online: Boolean = false,
     enabled: Boolean,
     onConnect: () -> Unit,
     onForget: (() -> Unit)?,
@@ -105,8 +107,14 @@ fun HostCard(
                     textAlign = TextAlign.Center,
                 )
                 Spacer(Modifier.height(12.dp))
+                Row(
+                    verticalAlignment = Alignment.CenterVertically,
+                    horizontalArrangement = Arrangement.spacedBy(12.dp),
+                ) {
+                    PresencePill(online)
                     StatusPill(status)
                 }
+            }
 
             if (onForget != null || onEdit != null || onWake != null) {
                 var menu by remember { mutableStateOf(false) }
@@ -173,6 +181,27 @@ fun HostAvatar(name: String) {
     }
 }
 
+/**
+ * A small dot + label for live presence: green Online when the host advertises on mDNS OR answers
+ * the reachability probe (so a routed/VPN host that never advertises still reads Online), dimmed
+ * Offline otherwise.
+ */
+@Composable
+fun PresencePill(online: Boolean) {
+    val color =
+        if (online) MaterialTheme.colorScheme.primary
+        else MaterialTheme.colorScheme.onSurfaceVariant
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        Box(Modifier.size(8.dp).clip(CircleShape).background(color))
+        Spacer(Modifier.width(6.dp))
+        Text(
+            if (online) "Online" else "Offline",
+            style = MaterialTheme.typography.labelMedium,
+            color = color,
+        )
+    }
+}
+
 /** A small colored dot + label for the host's trust state. */
 @Composable
 fun StatusPill(status: HostStatus) {

clients/android/app/src/test/kotlin/io/unom/punktfunk/screenshots/ScreenshotTest.kt

@@ -58,7 +58,15 @@ class ScreenshotTest {
 
     @Test
     @Config(sdk = [36], qualifiers = "w800dp-h360dp-xxhdpi") // landscape — the stream is immersive
-    fun stream() = shootRoot("stream") { StreamScene() }
+    fun stream() = shootRoot("stream") { StreamScene(io.unom.punktfunk.StatsVerbosity.DETAILED) }
+
+    @Test
+    @Config(sdk = [36], qualifiers = "w800dp-h360dp-xxhdpi")
+    fun streamCompact() = shootRoot("stream-compact") { StreamScene(io.unom.punktfunk.StatsVerbosity.COMPACT) }
+
+    @Test
+    @Config(sdk = [36], qualifiers = "w800dp-h360dp-xxhdpi")
+    fun streamNormal() = shootRoot("stream-normal") { StreamScene(io.unom.punktfunk.StatsVerbosity.NORMAL) }
 
     @Test
     fun trust() = shootScreen("trust") {

clients/android/app/src/test/kotlin/io/unom/punktfunk/screenshots/ShotScenes.kt

@@ -30,6 +30,7 @@ import io.unom.punktfunk.Settings
 import io.unom.punktfunk.TouchMode
 import io.unom.punktfunk.SettingsScreen
 import io.unom.punktfunk.StatsOverlay
+import io.unom.punktfunk.StatsVerbosity
 import io.unom.punktfunk.components.HostCard
 import io.unom.punktfunk.components.SectionLabel
 import io.unom.punktfunk.models.HostStatus
@@ -109,7 +110,7 @@ internal fun SettingsScene() {
                 compositor = 1,
                 gamepad = 2,
                 micEnabled = true,
-                statsHudEnabled = true,
+                statsVerbosity = StatsVerbosity.DETAILED,
                 touchMode = TouchMode.TRACKPAD,
             ),
             onChange = {},
@@ -177,9 +178,12 @@ internal fun PairDialog() {
     )
 }
 
-/** The live stats HUD (the real StatsOverlay) over a synthetic "streamed frame" gradient. */
+/**
+ * The live stats HUD (the real StatsOverlay) over a synthetic "streamed frame" gradient, at the
+ * given [verbosity] tier — one scene per tier documents how far each tones the overlay down.
+ */
 @Composable
-internal fun StreamScene() {
+internal fun StreamScene(verbosity: StatsVerbosity = StatsVerbosity.DETAILED) {
     Box(
         Modifier
             .fillMaxSize()
@@ -187,17 +191,25 @@ internal fun StreamScene() {
                 Brush.linearGradient(listOf(Color(0xFF2A1E5C), Color(0xFF0E1B3D), Color(0xFF06122B))),
             ),
     ) {
-        // The full 18-double unified layout (design/stats-unification.md): [fps, mbps, e2eP50,
+        // The full 26-double unified layout (design/stats-unification.md): [fps, mbps, e2eP50,
-        // e2eP95, latValid, skew, w, h, hz, lost, bitDepth, colorPrimaries, colorTransfer,
+        // e2eP95, latValid, skew, w, h, hz, lostTotal, bitDepth, colorPrimaries, colorTransfer,
-        // chromaFormatIdc, hostNetP50, decodeP50, hostP50, netP50]. 10/9/16/1 = a 10-bit BT.2020
+        // chromaFormatIdc, hostNetP50, decodeP50, hostP50, netP50, lost, skipped, fec, frames,
-        // PQ (HDR) 4:2:0 feed so the HUD renders its video-feed line; the Phase-2 stage terms
+        // dispValid, displayP50, e2eDispP50, e2eDispP95].
-        // (host 0.6 + network 0.3 + decode 0.4) tile the 1.3 ms headline so it renders the full
+        // 10/9/16/1 = a 10-bit BT.2020 PQ (HDR) 4:2:0 feed so the DETAILED HUD renders its
-        // split equation, and the decoder label line shows the ranked low-latency decoder.
+        // video-feed line; the display stage is valid (dispValid 1) so the headline is the
+        // directly-measured capture→displayed pair (1.8/2.6) and the Phase-2 stage terms
+        // (host 0.6 + network 0.3 + decode 0.4 + display 0.5) tile it, rendering the full split
+        // equation; the decoder label shows the ranked low-latency decoder. Light per-window loss
+        // (lost 2 · skipped 1 · FEC 5 of 238) so the reliability line (NORMAL/DETAILED) and the
+        // compact loss flag both render.
         StatsOverlay(
             doubleArrayOf(
-                238.0, 921.4, 1.3, 2.1, 1.0, 1.0, 5120.0, 1440.0, 240.0, 0.0,
+                238.0, 921.4, 1.3, 2.1, 1.0, 1.0, 5120.0, 1440.0, 240.0, 2.0,
                 10.0, 9.0, 16.0, 1.0, 0.9, 0.4, 0.6, 0.3,
+                2.0, 1.0, 5.0, 238.0,
+                1.0, 0.5, 1.8, 2.6,
             ),
+            verbosity = verbosity,
             decoderLabel = "c2.qti.hevc.decoder · low-latency",
             modifier = Modifier.align(Alignment.TopStart).padding(12.dp),
         )

clients/android/build.gradle.kts

@@ -3,7 +3,7 @@
 // here (version + apply false) so modules can apply it version-less; its version pins the build's
 // Kotlin (compose-compiler and Kotlin release in lockstep), keeping them matched.
 // Toolchain: AGP 9.2.0 · Gradle 9.4.1 · Kotlin/Compose-compiler 2.3.21 · JDK 21 · Compose BOM
-// 2026.05.01 · compileSdk 37 · targetSdk 36 · minSdk 31.
+// 2026.05.01 · compileSdk 37 · targetSdk 37 · minSdk 28.
 plugins {
     id("com.android.application") version "9.2.1" apply false
     id("com.android.library") version "9.2.1" apply false

clients/android/kit/src/main/kotlin/io/unom/punktfunk/kit/NativeBridge.kt

@@ -48,6 +48,9 @@ object NativeBridge {
         gamepadPref: Int,
         hdrEnabled: Boolean,
         audioChannels: Int,
+        /** `quic::CODEC_*` bitfield of codecs this device decodes ([VideoDecoders.decodableCodecBits]);
+         *  `0` falls back to H.264|HEVC. The host resolves the emitted codec from this ∩ its GPU. */
+        videoCodecs: Int,
         /** Preferred video codec as a `quic::CODEC_*` bit (`0` = auto). Soft — the host falls back. */
         preferredCodec: Int,
         timeoutMs: Int,
@@ -123,6 +126,15 @@ object NativeBridge {
      */
     external fun nativeWakeOnLan(macsCsv: String, lastIp: String): Boolean
 
+    /**
+     * Bounded, trust-agnostic QUIC reachability probe to [host]:[port] (mDNS-independent): true if
+     * the host completed the handshake within [timeoutMs]. No pin/identity presented. Lets a saved
+     * host reached over a routed network (Tailscale/VPN/another subnet) — which never advertises on
+     * mDNS — still show as online. Blocking (builds its own runtime) — run on a background
+     * dispatcher, never the main thread.
+     */
+    external fun nativeProbe(host: String, port: Int, timeoutMs: Int): Boolean
+
     /**
      * Apply the user's "Low-latency mode (experimental)" toggle to the process-wide transport
      * defaults — today just DSCP/QoS marking on the media sockets. Must be called BEFORE
@@ -171,16 +183,22 @@ object NativeBridge {
 
     /**
      * Drain ~1 s of live decode stats for the on-stream HUD, or `null` when no decode thread runs.
-     * Returns 18 doubles (unified stats spec, `design/stats-unification.md`):
+     * Returns 26 doubles (unified stats spec, `design/stats-unification.md`):
      * `[fps, mbps, e2eP50Ms, e2eP95Ms, latValid, skewCorrected, width, height, refreshHz, framesLost,
      * bitDepth, colorPrimaries, colorTransfer, chromaFormatIdc, hostNetP50Ms, decodeP50Ms, hostP50Ms,
-     * netP50Ms]`
+     * netP50Ms, lostWindow, skippedWindow, fecWindow, framesWindow, dispValid, displayP50Ms,
-     * (the two flags are 1.0/0.0; indexes 2/3 are the end-to-end capture→decoded headline; 10–13
+     * e2eDispP50Ms, e2eDispP95Ms]`
+     * (the flags are 1.0/0.0; indexes 2/3 are the end-to-end capture→decoded headline; 10–13
      * describe the negotiated video feed — bit depth 8/10, CICP primaries/transfer, and the HEVC
      * chroma_format_idc 1=4:2:0 / 3=4:4:4; 14/15 are the stage p50s tiling the headline —
      * `host+network` = capture→received, `decode` = received→decoded; 16/17 split the
      * `host+network` term via the host's per-AU 0xCF timings — `host` = the host's capture→sent,
-     * `network` = the remainder — both 0.0 when no timing matched this window, i.e. an old host).
+     * `network` = the remainder — both 0.0 when no timing matched this window, i.e. an old host;
+     * 18–21 are the per-window reliability counters — lost/skipped/FEC/received; 22–25 are the
+     * `display` stage from the OnFrameRendered render timestamps — when `dispValid` is 1.0 the
+     * headline becomes the directly-measured capture→displayed pair at 24/25, tiled by
+     * `host+network` + `decode` + `display` (23), and when 0.0 the HUD falls back to the
+     * capture→decoded headline at 2/3 without the `display` term).
      * Poll ~1 Hz; each call resets the measurement window.
      */
     external fun nativeVideoStats(handle: Long): DoubleArray?

clients/android/kit/src/main/kotlin/io/unom/punktfunk/kit/VideoDecoders.kt

@@ -44,6 +44,15 @@ object VideoDecoders {
      * Pick the best decoder for [mime] (`"video/hevc"` / `"video/avc"` / `"video/av01"`), or `null`
      * to let the platform resolve its default. Enumerates once — call at stream start.
      */
+    /**
+     * The `quic::CODEC_*` bitfield of codecs this device can decode, advertised in the Hello so the
+     * host never emits a codec the decode loop can't open: H.264 (1) and HEVC (2) always (universal
+     * on Android hardware), plus AV1 (4) only when [pickDecoder] finds a real (hardware, non-blocked)
+     * `video/av01` decoder. Enumerates `MediaCodecList` — call at connect time, not per frame.
+     */
+    fun decodableCodecBits(): Int =
+        1 or 2 or (if (pickDecoder("video/av01") != null) 4 else 0)
+
     fun pickDecoder(mime: String): DecoderChoice? {
         if (mime.isEmpty()) return null
         val infos = runCatching { MediaCodecList(MediaCodecList.REGULAR_CODECS).codecInfos }

clients/android/native/Cargo.toml

@@ -20,7 +20,7 @@ punktfunk-core = { path = "../../../crates/punktfunk-core", features = ["quic"]
 jni = "0.21"
 log = "0.4"
 # LAN host discovery: browse the host's `_punktfunk._udp` mDNS advert — the SAME crate + service the
-# Linux/Windows clients use (`clients/linux/src/discovery.rs`), replacing Android's per-OEM
+# Linux/Windows clients use (`crates/pf-client-core/src/discovery.rs`), replacing Android's per-OEM
 # `NsdManager` system daemon with one tested browse path. Pure Rust (socket2/if-addrs/mio), so it
 # cross-compiles to the Android targets AND builds on the host (the JNI seam links into
 # `cargo build --workspace`). Kotlin keeps only the Wi-Fi `MulticastLock` + permission UX.
@@ -47,6 +47,12 @@ tracing = { version = "0.1", default-features = false, features = ["std", "log"]
 # (ANativeWindow_setFrameRate) is dlsym-resolved at runtime (see decode::try_set_frame_rate), not
 # linked, so the .so still loads on API 28/29.
 ndk = { version = "0.9", features = ["media", "audio", "nativewindow", "api-level-28"] }
+# Raw FFI for the one AMediaCodec entry point the `ndk` wrapper lacks:
+# `AMediaCodec_setOnFrameRenderedCallback` (API 26, under the minSdk-28 floor ⇒ hard-linked) — the
+# per-frame render-timestamp callback behind the HUD's `display` stage (see decode::DisplayTracker).
+# Reaching it needs the codec's raw pointer, which is why the workspace pins `ndk` to the vendored
+# copy whose only patch makes `MediaCodec::as_ptr` public (vendor/ndk, wired in the root Cargo.toml).
+ndk-sys = { version = "0.6", features = ["media"] }
 # setpriority/gettid to raise the decode thread toward URGENT_DISPLAY (see decode::boost_thread_priority).
 libc = "0.2"
 # Opus decode for the host→client audio plane (0xC9: 48 kHz stereo, 5 ms frames). Same crate the

clients/android/native/src/decode.rs

@@ -36,11 +36,17 @@ const IN_FLIGHT_CAP: usize = 64;
 /// this deep is a lost datagram (or an old host that never sends any) and gets evicted.
 const PENDING_SPLIT_CAP: usize = 256;
 
+/// Cap on rendered frames parked in [`DisplayTracker`] awaiting their `OnFrameRendered` render
+/// timestamp: the callback trails its release by at most a vsync or two, so anything this deep
+/// means the platform stopped delivering render callbacks (allowed under load, per the docs) and
+/// gets evicted.
+const RENDERED_CAP: usize = 64;
+
 /// Whether low-latency mode uses the event-driven async decode loop (default) or the synchronous
 /// poll loop. Flip to `false` to A/B the two on the HUD (`design/…`); the async loop presents a
 /// decoded frame the instant it's ready instead of waiting out a poll interval. Only consulted when
-/// the user's "Low-latency mode (experimental)" toggle is ON — off, the sync loop always runs (the
+/// the user's "Low-latency mode" toggle is ON (now the default) — off, the sync loop always runs (the
-/// original pipeline).
+/// original pipeline, kept as the per-device escape hatch).
 const USE_ASYNC_DECODE: bool = true;
 
 /// Per-session decode configuration, resolved by the JNI layer (`nativeStartVideo`) and passed to
@@ -52,10 +58,10 @@ pub(crate) struct DecodeOptions {
     /// Whether Kotlin found the chosen decoder advertises `FEATURE_LowLatency` (queryable only via
     /// the Java `CodecCapabilities` API) — surfaced on the HUD next to the decoder name.
     pub ll_feature: bool,
-    /// The user's "Low-latency mode (experimental)" master toggle. On ⇒ the full overhaul: async
+    /// The user's "Low-latency mode" master toggle. On (default) ⇒ the full fast pipeline: async
     /// decode loop, per-SoC vendor keys, pipeline thread boosts, ADPF max-performance, forced TV
-    /// mode switch. Off (default) ⇒ the original pre-overhaul pipeline, kept as the known-good
+    /// mode switch. Off ⇒ the original synchronous pre-overhaul pipeline, kept as the per-device
-    /// baseline while the overhaul is experimental.
+    /// escape hatch.
     pub low_latency_mode: bool,
     /// TV form factor (Kotlin's `UiModeManager`): actively drive the HDMI output into the stream's
     /// refresh mode, vs. the softer seamless hint on a phone/tablet.
@@ -208,6 +214,12 @@ fn run_sync(
     // host-minus-client clock offset (0 if the host didn't answer the skew handshake — then the
     // HUD flags it "(same-host clock)").
     let clock_offset = client.clock_offset_ns;
+    // Display stage (spec `display` + the capture→displayed headline): frames released with
+    // render = true are parked in the tracker; the OnFrameRendered callback pairs them with
+    // SurfaceFlinger's render timestamp. `render_cb` is the callback's leaked Arc refcount,
+    // reclaimed after the codec is dropped below.
+    let tracker = DisplayTracker::new(stats.clone(), clock_offset);
+    let render_cb = install_render_callback(&codec, &tracker);
     // HUD stage split: receipt timestamps keyed by the pts we queue into the codec, so the decoded
     // point (output-buffer dequeue — MediaCodec round-trips presentationTimeUs) can be paired back
     // to its receipt for the `decode` stage. Only fed while the HUD is visible.
@@ -309,6 +321,7 @@ fn run_sync(
             &stats,
             &mut in_flight,
             clock_offset,
+            &tracker,
         );
         rendered += r;
         discarded += d;
@@ -367,6 +380,11 @@ fn run_sync(
     }
 
     let _ = codec.stop();
+    drop(codec); // AMediaCodec_delete — after this no render callback can fire
+    if let Some(ud) = render_cb {
+        // SAFETY: the codec was dropped above; this registration's single reclaim.
+        unsafe { release_render_callback(ud) };
+    }
     log::info!("decode: stopped (fed={fed} rendered={rendered} discarded={discarded})");
 }
 
@@ -380,6 +398,145 @@ fn now_realtime_ns() -> i128 {
         .unwrap_or(0)
 }
 
+/// `CLOCK_MONOTONIC` now in nanoseconds — the base of the `systemNano` render timestamp the
+/// `OnFrameRendered` callback reports (Android's `System.nanoTime`), read only to re-base that
+/// stamp onto `CLOCK_REALTIME` (see [`on_frame_rendered`]).
+fn now_monotonic_ns() -> i128 {
+    let mut ts = libc::timespec {
+        tv_sec: 0,
+        tv_nsec: 0,
+    };
+    // SAFETY: `clock_gettime` with a valid out-pointer is an always-safe syscall.
+    unsafe { libc::clock_gettime(libc::CLOCK_MONOTONIC, &mut ts) };
+    ts.tv_sec as i128 * 1_000_000_000 + ts.tv_nsec as i128
+}
+
+/// State shared between the decode loop and the `AMediaCodec` `OnFrameRendered` callback (which
+/// fires on a codec-internal thread): rendered frames awaiting their render timestamp, so the HUD
+/// gets the spec's `display` stage (decoded→displayed) and the `capture→displayed` end-to-end
+/// headline (`design/stats-unification.md` — this replaces Android's v1 `capture→decoded`
+/// endpoint whenever the platform delivers render callbacks).
+struct DisplayTracker {
+    stats: Arc<crate::stats::VideoStats>,
+    /// Host-minus-client clock offset (ns) for the skew-corrected end-to-end sample.
+    clock_offset: i64,
+    /// `(pts_us, decoded_real_ns)` of frames released with `render = true`, in release order,
+    /// awaiting their callback. Pushes are HUD-gated by the caller, so this stays empty (and the
+    /// callback early-outs) while the overlay is hidden.
+    rendered: Mutex<VecDeque<(u64, i128)>>,
+}
+
+impl DisplayTracker {
+    fn new(stats: Arc<crate::stats::VideoStats>, clock_offset: i64) -> Arc<DisplayTracker> {
+        Arc::new(DisplayTracker {
+            stats,
+            clock_offset,
+            rendered: Mutex::new(VecDeque::new()),
+        })
+    }
+
+    /// Park one just-rendered frame's `(pts, decoded stamp)` for the render callback to pair.
+    /// Caller gates on the HUD being visible.
+    fn note_rendered(&self, pts_us: u64, decoded_ns: i128) {
+        let mut g = self
+            .rendered
+            .lock()
+            .unwrap_or_else(std::sync::PoisonError::into_inner);
+        g.push_back((pts_us, decoded_ns));
+        if g.len() > RENDERED_CAP {
+            g.pop_front(); // render callbacks stopped coming (allowed under load) — evict
+        }
+    }
+}
+
+/// Register [`on_frame_rendered`] on the codec (`AMediaCodec_setOnFrameRenderedCallback`, API 26 —
+/// under the minSdk-28 floor, so hard-linked via `ndk-sys`; the `ndk` wrapper has no binding, which
+/// is what the vendored crate's public `as_ptr` patch is for). Returns the userdata pointer holding
+/// a leaked `Arc<DisplayTracker>` refcount; the caller MUST reclaim it with
+/// [`release_render_callback`] AFTER dropping the codec (`AMediaCodec_delete` is what guarantees no
+/// further callback can fire). `None` (nothing to reclaim) if the platform refused — the HUD then
+/// simply has no `display` stage, exactly the pre-callback behaviour.
+fn install_render_callback(
+    codec: &MediaCodec,
+    tracker: &Arc<DisplayTracker>,
+) -> Option<*const DisplayTracker> {
+    let ud = Arc::into_raw(tracker.clone());
+    // SAFETY: `codec.as_ptr()` is the live codec this thread owns; `ud` outlives the registration
+    // (reclaimed only after the codec is deleted, per this function's contract).
+    let status = unsafe {
+        ndk_sys::AMediaCodec_setOnFrameRenderedCallback(
+            codec.as_ptr(),
+            Some(on_frame_rendered),
+            ud as *mut c_void,
+        )
+    };
+    if status == ndk_sys::media_status_t::AMEDIA_OK {
+        Some(ud)
+    } else {
+        log::warn!("decode: setOnFrameRenderedCallback failed ({status:?}) — no display stage");
+        // SAFETY: registration failed, so the codec never took the reference — reclaim it now.
+        unsafe { drop(Arc::from_raw(ud)) };
+        None
+    }
+}
+
+/// Reclaim [`install_render_callback`]'s leaked `Arc` refcount.
+///
+/// # Safety
+/// Call exactly once, and only after the codec the callback was registered on has been dropped —
+/// deleting the codec stops its internal threads, so no callback can still be running (or run
+/// later) against this pointer.
+unsafe fn release_render_callback(ud: *const DisplayTracker) {
+    drop(Arc::from_raw(ud));
+}
+
+/// The `AMediaCodecOnFrameRendered` trampoline: fires (possibly batched) on a codec-internal
+/// thread once per output frame actually placed on the output surface, with SurfaceFlinger's
+/// render timestamp. That timestamp (`system_nano`) is on `CLOCK_MONOTONIC`, so it is re-based
+/// onto `CLOCK_REALTIME` here — against monotonic-now at callback time, which also cancels any lag
+/// between the frame rendering and the (batchable) callback delivery — to subtract against the
+/// receipt/decode stamps and the host capture pts. Records the HUD's `displayed` point:
+/// `end-to-end` = capture→displayed (skew-corrected) and `display` = decoded→displayed
+/// (single-clock local). Panic-free by construction (poison-proof lock, saturating math) — an
+/// unwind out of an `extern "C"` fn would abort the process.
+unsafe extern "C" fn on_frame_rendered(
+    _codec: *mut ndk_sys::AMediaCodec,
+    userdata: *mut c_void,
+    media_time_us: i64,
+    system_nano: i64,
+) {
+    let t = &*(userdata as *const DisplayTracker);
+    if !t.stats.enabled() {
+        return; // HUD hidden — the ring is empty too (pushes are caller-gated)
+    }
+    let displayed_ns = now_realtime_ns() - (now_monotonic_ns() - system_nano as i128);
+    let pts_us = media_time_us.max(0) as u64;
+    // Pair the frame back to its release record, evicting older entries (their callbacks were
+    // dropped by the platform, or the entry predates a HUD toggle) — same monotonic-eviction
+    // discipline as `note_decoded_pts`.
+    let mut decoded_ns = None;
+    {
+        let mut g = t
+            .rendered
+            .lock()
+            .unwrap_or_else(std::sync::PoisonError::into_inner);
+        while let Some(&(p, d)) = g.front() {
+            if p > pts_us {
+                break; // future frame — leave it for its own callback
+            }
+            g.pop_front();
+            if p == pts_us {
+                decoded_ns = Some(d);
+                break;
+            }
+        }
+    }
+    let e2e_ns = displayed_ns + t.clock_offset as i128 - pts_us as i128 * 1000;
+    let e2e_us = (e2e_ns > 0 && e2e_ns < 10_000_000_000).then_some((e2e_ns / 1000) as u64);
+    let display_us = decoded_ns.map(|d| ((displayed_ns - d).max(0) / 1000) as u64);
+    t.stats.note_displayed(e2e_us, display_us);
+}
+
 /// The MediaCodec MIME for the codec the host resolved (`Welcome.codec`). Shared by the decode
 /// thread and `nativeVideoMime` (which tells Kotlin what to rank decoders for). AV1 uses the
 /// AOSP `video/av01` type; anything not H.264/AV1 is treated as HEVC (every pre-negotiation host
@@ -409,10 +566,10 @@ fn create_codec(mime: &str, preferred: Option<&str>) -> Option<MediaCodec> {
 
 /// Apply the low-latency MediaFormat keys for `codec_name`.
 ///
-/// `aggressive` = the "Low-latency mode (experimental)" master toggle. **Off** (default) ⇒ the
+/// `aggressive` = the "Low-latency mode" master toggle. **Off** ⇒ the pre-overhaul key set,
-/// pre-overhaul key set, byte-for-byte — the standard `low-latency` key, the blind Qualcomm vendor
+/// byte-for-byte — the standard `low-latency` key, the blind Qualcomm vendor twin, `priority = 0` AND
-/// twin, `priority = 0` AND `operating-rate = MAX` set together — kept as the known-good baseline
+/// `operating-rate = MAX` set together — kept as the per-device escape hatch (the profile every device
-/// (the profile every device streamed with before the overhaul). **On** ⇒ the Moonlight-parity
+/// streamed with before the overhaul). **On** (default) ⇒ the Moonlight-parity
 /// profile: MediaTek's `vdec-lowlatency` (unconditionally — ignored off MediaTek), the per-SoC
 /// vendor extension keys (gated on the decoder-name prefix the way Moonlight-Android does, since a
 /// key one vendor honours is meaningless on another), and one *mutually exclusive* clock hint.
@@ -493,10 +650,14 @@ fn decoder_supports_max_operating_rate(name_lower: &str) -> bool {
 }
 
 /// One decoded output buffer ready to release: its codec buffer index + the pts the codec echoed
-/// (from the output callback's `BufferInfo`), used to pair the `decode` HUD stat.
+/// (from the output callback's `BufferInfo`), used to pair the `decode` HUD stat, and the
+/// wall-clock instant the output callback fired — the spec's `decoded` point ("decoder output
+/// frame available"), stamped at the callback so the event-channel hop + coalescing wait in the
+/// loop never inflates the decode stage.
 struct OutputReady {
     index: usize,
     pts_us: u64,
+    decoded_ns: i128,
 }
 
 /// Events the async decode loop reacts to. The codec's async-notify callbacks (which run on its
@@ -507,8 +668,12 @@ enum DecodeEvent {
     Au(Frame),
     /// An input buffer slot freed (index) — we can queue an AU into it.
     InputAvailable(usize),
-    /// A decoded frame is ready (buffer index + echoed pts).
+    /// A decoded frame is ready (buffer index + echoed pts + the callback-time `decoded` stamp).
-    OutputAvailable { index: usize, pts_us: u64 },
+    OutputAvailable {
+        index: usize,
+        pts_us: u64,
+        decoded_ns: i128,
+    },
     /// The output format changed — re-check the stream's colour signalling (HDR DataSpace).
     FormatChanged,
     /// The codec reported an error; `fatal` when neither recoverable nor transient.
@@ -569,6 +734,10 @@ fn run_async(
                 let _ = out_tx.send(DecodeEvent::OutputAvailable {
                     index: idx,
                     pts_us: info.presentation_time_us().max(0) as u64,
+                    // The `decoded` HUD point: stamp HERE, on the codec's looper thread, so the
+                    // decode stage ends when the frame actually became available — not after the
+                    // channel hop + whatever work the loop coalesces in front of presenting it.
+                    decoded_ns: now_realtime_ns(),
                 });
             })),
             on_format_changed: Some(Box::new(move |_fmt| {
@@ -637,6 +806,12 @@ fn run_async(
     // HUD is visible.
     let clock_offset = client.clock_offset_ns;
     let in_flight = Arc::new(Mutex::new(VecDeque::<(u64, i128)>::new()));
+    // Display stage (spec `display` + the capture→displayed headline): the rendered frame is
+    // parked in the tracker at release; the OnFrameRendered callback pairs it with
+    // SurfaceFlinger's render timestamp. `render_cb` is the callback's leaked Arc refcount,
+    // reclaimed after the codec is dropped below.
+    let tracker = DisplayTracker::new(stats.clone(), clock_offset);
+    let render_cb = install_render_callback(&codec, &tracker);
 
     // Feeder thread: block on the network so this loop doesn't (an AU's arrival becomes an event that
     // wakes us immediately, with no input-side poll latency). It also records the `received` HUD stat.
@@ -697,29 +872,30 @@ fn run_async(
         };
         let work_t0 = Instant::now();
         let mut fmt_dirty = false;
-        let mut au_dropped = false;
+        let mut aus_dropped: u64 = 0;
         if let Some(ev) = ev0 {
-            au_dropped |= dispatch_event(
+            aus_dropped += u64::from(dispatch_event(
                 ev,
                 &mut pending_aus,
                 &mut free_inputs,
                 &mut ready,
                 &mut fmt_dirty,
                 &mut fatal,
-            );
+            ));
         }
         // Coalesce every other event already queued into this one work pass — correct newest-only
         // presentation across a decode burst, and batched feeding.
         while let Ok(ev) = ev_rx.try_recv() {
-            au_dropped |= dispatch_event(
+            aus_dropped += u64::from(dispatch_event(
                 ev,
                 &mut pending_aus,
                 &mut free_inputs,
                 &mut ready,
                 &mut fmt_dirty,
                 &mut fatal,
-            );
+            ));
         }
+        stats.note_skipped(aus_dropped); // parked-AU overflow drops are client-side skips too
         if fmt_dirty {
             apply_hdr_dataspace(&codec, &window, &mut applied_ds);
         }
@@ -731,6 +907,7 @@ fn run_async(
             &stats,
             &in_flight,
             clock_offset,
+            &tracker,
             &mut rendered,
             &mut discarded,
         );
@@ -768,7 +945,7 @@ fn run_async(
         // dropped a parked AU on overflow), throttled so a multi-frame recovery gap doesn't flood the
         // control stream.
         let dropped = client.frames_dropped();
-        if dropped > last_dropped || au_dropped {
+        if dropped > last_dropped || aus_dropped > 0 {
             last_dropped = dropped;
             let now = Instant::now();
             if last_kf_req.is_none_or(|t| now.duration_since(t) >= Duration::from_millis(100)) {
@@ -783,6 +960,11 @@ fn run_async(
     if let Some(j) = feeder {
         let _ = j.join();
     }
+    drop(codec); // AMediaCodec_delete — after this no render callback can fire
+    if let Some(ud) = render_cb {
+        // SAFETY: the codec was dropped above; this registration's single reclaim.
+        unsafe { release_render_callback(ud) };
+    }
     log::info!("decode: stopped (async, fed={fed} rendered={rendered} discarded={discarded})");
 }
 
@@ -863,7 +1045,15 @@ fn dispatch_event(
             }
         }
         DecodeEvent::InputAvailable(i) => free_inputs.push_back(i),
-        DecodeEvent::OutputAvailable { index, pts_us } => ready.push(OutputReady { index, pts_us }),
+        DecodeEvent::OutputAvailable {
+            index,
+            pts_us,
+            decoded_ns,
+        } => ready.push(OutputReady {
+            index,
+            pts_us,
+            decoded_ns,
+        }),
         DecodeEvent::FormatChanged => *fmt_dirty = true,
         DecodeEvent::Error { fatal: f } => {
             if f {
@@ -917,13 +1107,17 @@ fn feed_ready(
 /// burst of stale frames on glass is worse than skipping to the freshest (the sync loop's newest-ready
 /// policy, callback-driven). Every dequeued buffer, rendered or not, is the HUD's `decoded`
 /// measurement point (it finished decoding either way); samples are recorded in pts order so the
-/// receipt-map eviction stays monotonic. `ready` is drained.
+/// receipt-map eviction stays monotonic. The presented frame's `(pts, decoded stamp)` is parked in
+/// `tracker` for the OnFrameRendered callback — the `display` stage's other endpoint. `ready` is
+/// drained.
+#[allow(clippy::too_many_arguments)] // one call site; mirrors the sync loop's drain
 fn present_ready(
     codec: &MediaCodec,
     ready: &mut Vec<OutputReady>,
     stats: &crate::stats::VideoStats,
     in_flight: &Mutex<VecDeque<(u64, i128)>>,
     clock_offset: i64,
+    tracker: &DisplayTracker,
     rendered: &mut u64,
     discarded: &mut u64,
 ) {
@@ -935,15 +1129,24 @@ fn present_ready(
             .lock()
             .unwrap_or_else(std::sync::PoisonError::into_inner);
         for o in ready.iter() {
-            note_decoded_pts(stats, &mut g, clock_offset, o.pts_us);
+            note_decoded_pts(stats, &mut g, clock_offset, o.pts_us, o.decoded_ns);
         }
     }
     let last = ready.len() - 1;
+    let mut skipped: u64 = 0;
     for (i, o) in ready.drain(..).enumerate() {
         let render = i == last;
         match codec.release_output_buffer_by_index(o.index, render) {
-            Ok(()) if render => *rendered += 1,
+            Ok(()) if render => {
-            Ok(()) => *discarded += 1,
+                *rendered += 1;
+                if stats.enabled() {
+                    tracker.note_rendered(o.pts_us, o.decoded_ns);
+                }
+            }
+            Ok(()) => {
+                *discarded += 1;
+                skipped += 1;
+            }
             Err(e) => {
                 log::warn!(
                     "decode: release_output_buffer_by_index({}, {render}): {e}",
@@ -952,6 +1155,7 @@ fn present_ready(
             }
         }
     }
+    stats.note_skipped(skipped); // HUD `skipped` counter (newest-wins drops); no-op while hidden
 }
 
 /// React to an output-format change by signalling the stream's HDR dataspace on the Surface (SDR
@@ -1117,7 +1321,10 @@ fn feed(codec: &MediaCodec, au: &[u8], pts_us: u64) -> bool {
 /// Each dequeued buffer is also the HUD's `decoded` measurement point (rendered or not — the frame
 /// finished decoding either way): end-to-end = decoded + clock_offset − capture pts, and the
 /// `decode` stage pairs the buffer's echoed presentationTimeUs back to the receipt stamp in
-/// `in_flight` (single-clock local difference, no skew involved).
+/// `in_flight` (single-clock local difference, no skew involved). The presented frame's
+/// `(pts, decoded stamp)` is additionally parked in `tracker` for the OnFrameRendered callback —
+/// the `display` stage's other endpoint.
+#[allow(clippy::too_many_arguments)] // one call site; mirrors the async loop's present_ready
 fn drain(
     codec: &MediaCodec,
     window: &NativeWindow,
@@ -1126,23 +1333,33 @@ fn drain(
     stats: &crate::stats::VideoStats,
     in_flight: &mut VecDeque<(u64, i128)>,
     clock_offset: i64,
+    tracker: &DisplayTracker,
 ) -> (u64, u64) {
-    let mut held = None; // newest ready buffer so far, presented after the loop
+    // Newest ready buffer so far (presented after the loop) with its HUD metadata —
+    // `Some((pts_us, decoded_ns))` only while the HUD is visible (the stamp read is gated).
+    let mut held: Option<(OutputBuffer<'_>, Option<(u64, i128)>)> = None;
     let mut discarded: u64 = 0;
     let mut wait = first_wait;
     loop {
         match codec.dequeue_output_buffer(wait) {
             Ok(DequeuedOutputBufferInfoResult::Buffer(buf)) => {
                 wait = Duration::ZERO; // only the first dequeue may block
-                if stats.enabled() {
+                let meta = if stats.enabled() {
-                    note_decoded(stats, in_flight, clock_offset, &buf);
+                    // The dequeue IS the sync loop's decoded-availability instant.
-                }
+                    let pts_us = buf.info().presentation_time_us().max(0) as u64;
-                if let Some(stale) = held.replace(buf) {
+                    let decoded_ns = now_realtime_ns();
+                    note_decoded_pts(stats, in_flight, clock_offset, pts_us, decoded_ns);
+                    Some((pts_us, decoded_ns))
+                } else {
+                    None
+                };
+                if let Some((stale, _)) = held.replace((buf, meta)) {
                     // A newer frame is ready — drop the held one without rendering.
                     if let Err(e) = codec.release_output_buffer(stale, false) {
                         log::warn!("decode: release_output_buffer(discard): {e}");
                     }
                     discarded += 1;
+                    stats.note_skipped(1); // HUD `skipped` counter; no-op while hidden
                 }
             }
             Ok(DequeuedOutputBufferInfoResult::OutputFormatChanged) => {
@@ -1175,46 +1392,37 @@ fn drain(
             }
         }
     }
-    // Present the newest ready frame, if any.
+    // Present the newest ready frame, if any, and park its metadata for the render callback.
     let mut rendered = 0;
-    if let Some(buf) = held {
+    if let Some((buf, meta)) = held {
         match codec.release_output_buffer(buf, true) {
-            Ok(()) => rendered = 1,
+            Ok(()) => {
+                rendered = 1;
+                if let Some((pts_us, decoded_ns)) = meta {
+                    tracker.note_rendered(pts_us, decoded_ns);
+                }
+            }
             Err(e) => log::warn!("decode: release_output_buffer: {e}"),
         }
     }
     (rendered, discarded)
 }
 
-/// HUD `decoded` point for one dequeued output buffer: build the end-to-end (capture→decoded,
+/// HUD `decoded` point for one dequeued output frame, keyed by the echoed `presentationTimeUs`:
-/// skew-corrected, clamped to (0, 10 s)) and `decode` (received→decoded, single-clock local, ≥ 0)
+/// build the end-to-end (capture→decoded, skew-corrected, clamped to (0, 10 s)) and `decode`
-/// samples and hand them to [`crate::stats::VideoStats::note_decoded`]. The codec echoes the input
+/// (received→decoded, single-clock local, ≥ 0) samples and hand them to
-/// `presentationTimeUs` on the output buffer, which keys the receipt stamp in `in_flight`; entries
+/// [`crate::stats::VideoStats::note_decoded`]. The pts keys the receipt stamp in `in_flight`;
-/// older than the echoed pts are evicted (decode order == input order here — low-latency, no
+/// entries older than it are evicted (decode order == input order here — low-latency, no
 /// B-frames — so anything before it was dropped inside the codec or stamped before a flush).
-fn note_decoded(
+/// `decoded_ns` is the availability instant: the dequeue (sync loop) or the output callback's
-    stats: &crate::stats::VideoStats,
+/// stamp (async loop).
-    in_flight: &mut VecDeque<(u64, i128)>,
-    clock_offset: i64,
-    buf: &OutputBuffer<'_>,
-) {
-    note_decoded_pts(
-        stats,
-        in_flight,
-        clock_offset,
-        buf.info().presentation_time_us().max(0) as u64,
-    );
-}
-
-/// The [`note_decoded`] body keyed by the echoed `presentationTimeUs` directly — the async loop has
-/// the pts (from the output callback's `BufferInfo`) but no borrowed `OutputBuffer`, so it calls this.
 fn note_decoded_pts(
     stats: &crate::stats::VideoStats,
     in_flight: &mut VecDeque<(u64, i128)>,
     clock_offset: i64,
     pts_us: u64,
+    decoded_ns: i128,
 ) {
-    let decoded_ns = now_realtime_ns();
     // Pair the echoed pts back to its receipt stamp, evicting stale (older) entries as we go.
     let mut received_ns = None;
     while let Some(&(p, r)) = in_flight.front() {

clients/android/native/src/discovery.rs

@@ -1,5 +1,5 @@
 //! LAN host discovery over mDNS, in Rust via `mdns-sd` — the same crate + service type the
-//! Linux/Windows clients use (`clients/linux/src/discovery.rs`), exposed to Kotlin over JNI.
+//! Linux/Windows clients use (`crates/pf-client-core/src/discovery.rs`), exposed to Kotlin over JNI.
 //!
 //! Why not `NsdManager`: that API delegates to a per-OEM system mDNS daemon whose reliability
 //! varies wildly (the Android client's discovery was "mostly broken"). Browsing in our own Rust

clients/android/native/src/lib.rs

@@ -42,6 +42,9 @@ mod stats;
 // Ungated like `discovery`: pure `jni` + `punktfunk_core::wol` (no Android framework), so it links
 // into the host workspace build too. Kotlin only ever calls it on device.
 mod wol;
+// Ungated like `wol`: pure `jni` + `punktfunk_core::client` (the reachability probe). Kotlin calls
+// it off the main thread to light saved-host "online" pips independently of mDNS.
+mod probe;
 
 /// Initialize `android_logger` once when the JVM loads the library. Logs land in logcat under the
 /// `punktfunk` tag. Core `tracing` events (transport warnings: socket-buffer clamp, QoS failures)

clients/android/native/src/probe.rs

@@ -0,0 +1,36 @@
+//! JNI seam for the reachability probe: a bounded, trust-agnostic QUIC handshake to a saved host
+//! (`punktfunk_core::client::NativeClient::probe`). Like [`crate::wol`] it takes no session handle
+//! and links into the host workspace build (pure `jni` + `punktfunk_core`). Kotlin calls it
+//! periodically, on a background dispatcher, to light the "online" pip for saved hosts that never
+//! advertise on mDNS (reached over Tailscale / VPN / another subnet) — the display-side companion
+//! to the dial-first connect fix.
+
+use jni::objects::{JObject, JString};
+use jni::sys::{jboolean, jint};
+use jni::JNIEnv;
+use punktfunk_core::client::NativeClient;
+use std::time::Duration;
+
+/// `NativeBridge.nativeProbe(host, port, timeoutMs): Boolean` — true if `host:port` completed a
+/// QUIC handshake within `timeoutMs`. No pin/identity presented (trust-agnostic), mDNS-independent.
+/// Blocking (builds its own runtime) — Kotlin runs it on `Dispatchers.IO`, never the main thread.
+#[no_mangle]
+pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeProbe<'local>(
+    mut env: JNIEnv<'local>,
+    _this: JObject<'local>,
+    host: JString<'local>,
+    port: jint,
+    timeout_ms: jint,
+) -> jboolean {
+    let host: String = match env.get_string(&host) {
+        Ok(s) => s.into(),
+        Err(_) => return 0,
+    };
+    let port = port.clamp(0, u16::MAX as jint) as u16;
+    let timeout = Duration::from_millis(timeout_ms.max(0) as u64);
+    if NativeClient::probe(&host, port, timeout) {
+        1
+    } else {
+        0
+    }
+}

clients/android/native/src/session/connect.rs

@@ -76,6 +76,7 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeConnect<'lo
     gamepad_pref: jint,
     hdr_enabled: jboolean,
     audio_channels: jint,
+    video_codecs: jint,
     preferred_codec: jint,
     timeout_ms: jint,
     launch: JString<'local>,
@@ -142,10 +143,23 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeConnect<'lo
         // decoder + AAudio layout (read in `crate::audio::AudioPlayback::start`). Anything else
         // normalizes to stereo here.
         punktfunk_core::audio::normalize_channels(audio_channels.clamp(0, u8::MAX as jint) as u8),
-        // Codecs this device can decode — AMediaCodec decodes both HEVC and H.264 (AV1 isn't wired;
+        // Codecs this device can decode, ranked on the Kotlin side (`VideoDecoders.decodableCodecBits`:
-        // hosts don't emit it on the native path yet). The host resolves the emitted codec from these
+        // H.264 + HEVC always, AV1 when a real `video/av01` decoder exists — AMediaCodec is
-        // + the soft `preferred_codec` and echoes it in `connector.codec`, which drives the mime below.
+        // mime-driven, see `codec_mime`). Mask to the known bits and fall back to the pre-AV1
-        punktfunk_core::quic::CODEC_H264 | punktfunk_core::quic::CODEC_HEVC,
+        // H.264|HEVC pair on 0 so a bogus value can't advertise nothing and kill the handshake.
+        // The host resolves the emitted codec from these + the soft `preferred_codec` and echoes it
+        // in `connector.codec`, which drives the mime below.
+        {
+            let bits = (video_codecs.clamp(0, u8::MAX as jint) as u8)
+                & (punktfunk_core::quic::CODEC_H264
+                    | punktfunk_core::quic::CODEC_HEVC
+                    | punktfunk_core::quic::CODEC_AV1);
+            if bits == 0 {
+                punktfunk_core::quic::CODEC_H264 | punktfunk_core::quic::CODEC_HEVC
+            } else {
+                bits
+            }
+        },
         preferred_codec.clamp(0, u8::MAX as jint) as u8,
         launch,   // a store-qualified library id to boot into a game, or None for the desktop
         pin,      // Some → Crypto on host-fp mismatch

clients/android/native/src/session/planes.rs

@@ -144,16 +144,25 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeStopVideo(
 }
 
 /// `NativeBridge.nativeVideoStats(handle): DoubleArray?` — drain ~1 s of decode stats for the HUD
-/// (unified stats spec, `design/stats-unification.md`). Returns 18 doubles
+/// (unified stats spec, `design/stats-unification.md`). Returns 26 doubles
 /// `[fps, mbps, e2eP50Ms, e2eP95Ms, latValid, skewCorrected, width, height, refreshHz, framesLost,
 /// bitDepth, colorPrimaries, colorTransfer, chromaFormatIdc, hostNetP50Ms, decodeP50Ms, hostP50Ms,
-/// netP50Ms]`
+/// netP50Ms, lostWindow, skippedWindow, fecWindow, framesWindow, dispValid, displayP50Ms,
-/// (the two flags are 1.0/0.0; indexes 0–15 match the previous 16-double layout — 0–13 the original
+/// e2eDispP50Ms, e2eDispP95Ms]`
+/// (the flags are 1.0/0.0; indexes 0–21 match the previous 22-double layout — 0–13 the original
 /// 14-double one with the latency pair re-based to the end-to-end capture→decoded headline, 14/15
 /// the stage p50s tiling it: `host+network` = capture→received, `decode` = received→decoded; 16/17
 /// are the Phase-2 split of the `host+network` term from the per-AU 0xCF host timings — `host` =
 /// the host's capture→sent, `network` = the remainder — both 0.0 when no timing matched this
-/// window, i.e. an old host), or `null` when no decode thread is running. Poll ~1 Hz from the UI; each call
+/// window, i.e. an old host; 18–21 are the spec's per-window line-4 counters — `lost` =
+/// unrecoverable drops this window, `skipped` = client newest-wins/pacing drops, `fec` = shards
+/// recovered, `frames` = AUs received, so the HUD can compute `lost/(frames+lost)` — index 9 stays
+/// the cumulative session total for older readers; 22–25 are the `display` stage from the
+/// OnFrameRendered render timestamps — when `dispValid` is 1.0 the HUD headline becomes the
+/// directly-measured capture→displayed pair at 24/25 with `display` = decoded→displayed p50 at 23
+/// closing the equation, and when 0.0 — no render callback landed this window — it falls back to
+/// the capture→decoded headline at 2/3), or `null` when no decode thread is running.
+/// Poll ~1 Hz from the UI; each call
 /// resets the measurement window. Not android-gated — pure `jni` + connector reads, so it links on
 /// the host build too (Kotlin only ever calls it on device).
 #[no_mangle]
@@ -171,10 +180,12 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeVideoStats(
         if h.video.lock().unwrap().is_none() {
             return std::ptr::null_mut(); // not streaming → no stats
         }
-        let snap = h.stats.drain();
+        let snap = h
+            .stats
+            .drain(h.client.frames_dropped(), h.client.fec_recovered_shards());
         let mode = h.client.mode();
         let color = h.client.color;
-        let buf: [f64; 18] = [
+        let buf: [f64; 26] = [
             snap.fps,
             snap.mbps,
             snap.e2e_p50_ms,
@@ -200,6 +211,21 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeVideoStats(
             // when no timing matched this window (old host) — the HUD keeps the combined term.
             snap.host_p50_ms,
             snap.net_p50_ms,
+            // Spec line-4 counters, per-window: lost (unrecoverable drops), skipped (client
+            // newest-wins/pacing drops), FEC shards recovered, and the received-AU count so the
+            // HUD computes the loss percentage `lost/(frames+lost)` exactly.
+            snap.lost as f64,
+            snap.skipped as f64,
+            snap.fec as f64,
+            snap.frames as f64,
+            // `display` stage (OnFrameRendered render timestamps): validity flag, the
+            // decoded→displayed stage p50, and the directly-measured capture→displayed headline
+            // pair that supersedes 2/3 whenever the flag is set (spec: the equation always tiles
+            // the headline interval, so endpoint and terms move together).
+            if snap.disp_valid { 1.0 } else { 0.0 },
+            snap.display_p50_ms,
+            snap.e2e_disp_p50_ms,
+            snap.e2e_disp_p95_ms,
         ];
         let arr = match env.new_double_array(buf.len() as jsize) {
             Ok(a) => a,
@@ -228,7 +254,13 @@ pub extern "system" fn Java_io_unom_punktfunk_kit_NativeBridge_nativeSetVideoSta
         if handle != 0 {
             // SAFETY: live handle per the nativeConnect/nativeClose contract.
             let h = unsafe { &*(handle as *const SessionHandle) };
-            h.stats.set_enabled(enabled != 0);
+            // The current cumulative counters seed the window baselines, so the first snapshot's
+            // `lost`/`FEC` cover only time the HUD was actually up.
+            h.stats.set_enabled(
+                enabled != 0,
+                h.client.frames_dropped(),
+                h.client.fec_recovered_shards(),
+            );
         }
     })
 }

clients/android/native/src/stats.rs

@@ -1,9 +1,15 @@
 //! Live decode stats for the on-stream HUD, following the unified stats spec
-//! (`design/stats-unification.md`): FPS, receive throughput, and the Android v1 stage split —
+//! (`design/stats-unification.md`): FPS, receive throughput, and the full stage split — headline
-//! headline `end-to-end` = capture→decoded (p50/p95) tiled by `host+network` = capture→received
+//! `end-to-end` = capture→displayed (p50/p95, measured directly from the `OnFrameRendered` render
-//! and `decode` = received→decoded (stage p50s). When the host emits per-AU 0xCF host timings, the
+//! timestamps — `note_displayed`) tiled by `host+network` = capture→received, `decode` =
-//! `host+network` term further splits into `host` + `network` (Phase 2, `note_host_split`); an old
+//! received→decoded, and `display` = decoded→displayed (stage p50s). When the platform delivers no
-//! host emits none and the combined term stands. The decode thread is the sole writer
+//! render callbacks (allowed under load; `disp_valid` false), the HUD falls back to the v1
+//! capture→decoded headline without the `display` term. When the host emits per-AU 0xCF host
+//! timings, the `host+network` term further splits into `host` + `network` (Phase 2,
+//! `note_host_split`); an old host emits none and the combined term stands. The spec's line-4 counters are per-window too:
+//! `lost` / `FEC` are windowed here from the connector's cumulative counters (the caller passes the
+//! current totals into `set_enabled`/`drain`), `skipped` counts the client's own newest-wins drops
+//! (`note_skipped`). The decode thread is the sole writer
 //! (`note_received` per access unit at receipt, `note_decoded` per decoder output buffer); the JNI
 //! accessor `nativeVideoStats` drains a snapshot ~1 Hz and resets the window. Sampling is gated on
 //! the HUD actually being visible (`set_enabled`, driven by `nativeSetVideoStatsEnabled`) so the
@@ -54,6 +60,21 @@ struct Inner {
     net_us: Vec<u64>,
     /// `decode` stage = received→decoded samples, in microseconds (client-local, single clock).
     decode_us: Vec<u64>,
+    /// `display` stage = decoded→displayed samples, in microseconds (client-local, single clock),
+    /// from the `OnFrameRendered` render timestamps. Empty when the platform delivers no render
+    /// callbacks — the HUD then drops the term and the headline endpoint moves back to `decoded`.
+    display_us: Vec<u64>,
+    /// `end-to-end` = capture→displayed samples, µs (skew-corrected) — the spec's headline,
+    /// measured directly (not summed from stages). Empty under the same fallback as `display_us`.
+    e2e_disp_us: Vec<u64>,
+    /// Client-side newest-wins/pacing drops this window (decoded frames released without
+    /// rendering, or parked AUs dropped on overflow) — the spec's `skipped` counter.
+    skipped: u64,
+    /// Baselines for windowing the session-cumulative connector counters: the unrecoverable-drop
+    /// and FEC-recovered totals as of the last drain (or the enable that opened the window), so
+    /// each snapshot reports only THIS window's `lost` / `FEC` (spec line 4).
+    last_dropped_total: u64,
+    last_fec_total: u64,
     /// Whether the host answered the clock-skew handshake (latency is cross-machine valid).
     skew_corrected: bool,
 }
@@ -64,18 +85,38 @@ struct Inner {
 pub struct Snapshot {
     pub fps: f64,
     pub mbps: f64,
-    /// Headline `end-to-end` (capture→decoded) percentiles, ms.
+    /// Headline `end-to-end` (capture→decoded) percentiles, ms — the fallback headline when no
+    /// render callback landed this window (`disp_valid` false).
     pub e2e_p50_ms: f64,
     pub e2e_p95_ms: f64,
-    /// Stage p50s (ms): `host+network` (capture→received) and `decode` (received→decoded).
+    /// The full headline: `end-to-end` = capture→displayed percentiles, ms, measured directly from
+    /// the render timestamps. Meaningful only when `disp_valid`.
+    pub e2e_disp_p50_ms: f64,
+    pub e2e_disp_p95_ms: f64,
+    /// Stage p50s (ms): `host+network` (capture→received), `decode` (received→decoded), and
+    /// `display` (decoded→displayed; 0.0 when `disp_valid` is false — the HUD drops the term).
     pub hostnet_p50_ms: f64,
     pub decode_p50_ms: f64,
+    pub display_p50_ms: f64,
+    /// Whether any capture→displayed sample landed this window — gates the HUD's headline endpoint
+    /// (`capture→displayed` vs the capture→decoded fallback) and the equation's `display` term.
+    pub disp_valid: bool,
     /// Phase-2 `host` / `network` split p50s (ms) — 0.0 when no 0xCF timing matched this window
     /// (old host / no samples yet), in which case the HUD keeps the combined `host+network` term.
     pub host_p50_ms: f64,
     pub net_p50_ms: f64,
     pub lat_valid: bool,
     pub skew_corrected: bool,
+    /// Access units received this window (the count behind `fps`) — lets the HUD compute the
+    /// spec's loss percentage `lost / (received + lost)` exactly.
+    pub frames: u64,
+    /// Unrecoverable network frame drops this window (spec `lost`, windowed from the
+    /// session-cumulative connector counter).
+    pub lost: u64,
+    /// Client-side newest-wins/pacing drops this window (spec `skipped`).
+    pub skipped: u64,
+    /// FEC shards recovered this window (spec `FEC`, windowed from the cumulative counter).
+    pub fec: u64,
 }
 
 /// Percentile over a sorted-in-place µs sample vec, in ms. 0.0 when empty.
@@ -101,6 +142,11 @@ impl VideoStats {
                 host_us: Vec::with_capacity(256),
                 net_us: Vec::with_capacity(256),
                 decode_us: Vec::with_capacity(256),
+                display_us: Vec::with_capacity(256),
+                e2e_disp_us: Vec::with_capacity(256),
+                skipped: 0,
+                last_dropped_total: 0,
+                last_fec_total: 0,
                 skew_corrected: false,
             }),
         }
@@ -115,8 +161,10 @@ impl VideoStats {
     }
 
     /// Toggle sampling. Enabling resets the window, so the first HUD poll after a show never mixes
-    /// in counters (or a window start) from before the overlay was visible.
+    /// in counters (or a window start) from before the overlay was visible. `dropped_total` /
-    pub fn set_enabled(&self, on: bool) {
+    /// `fec_total` are the connector's session-cumulative counters at this instant — they seed the
+    /// windowing baselines so the first snapshot's `lost` / `FEC` cover only time the HUD was up.
+    pub fn set_enabled(&self, on: bool, dropped_total: u64, fec_total: u64) {
         let was = self.enabled.swap(on, Ordering::Relaxed);
         if on && !was {
             let mut g = self
@@ -131,6 +179,11 @@ impl VideoStats {
             g.host_us.clear();
             g.net_us.clear();
             g.decode_us.clear();
+            g.display_us.clear();
+            g.e2e_disp_us.clear();
+            g.skipped = 0;
+            g.last_dropped_total = dropped_total;
+            g.last_fec_total = fec_total;
         }
     }
 
@@ -206,6 +259,22 @@ impl VideoStats {
         g.net_us.push(net_us);
     }
 
+    /// Record client-side frame skips (spec `skipped`): decoded output buffers released without
+    /// rendering under the newest-wins policy, or parked AUs dropped on queue overflow.
+    // Driven only by the android-only decode thread; unreferenced on the host build — expected.
+    #[cfg_attr(not(target_os = "android"), allow(dead_code))]
+    pub fn note_skipped(&self, n: u64) {
+        if n == 0 || !self.enabled.load(Ordering::Relaxed) {
+            return; // HUD hidden — skip the lock
+        }
+        // Poison-proof for the same reason as `note_received`.
+        let mut g = self
+            .inner
+            .lock()
+            .unwrap_or_else(std::sync::PoisonError::into_inner);
+        g.skipped += n;
+    }
+
     /// Record one decoded output frame: its capture→decoded `end-to-end` sample and its
     /// received→decoded `decode` stage sample (either may be absent — e.g. the receipt stamp for
     /// this pts predates the HUD being shown).
@@ -228,8 +297,34 @@ impl VideoStats {
         }
     }
 
+    /// Record one displayed frame (the `OnFrameRendered` render timestamp, re-based to the
+    /// realtime clock): its capture→displayed `end-to-end` sample and its decoded→displayed
+    /// `display` stage sample (either may be absent — the e2e clamp rejected an out-of-range
+    /// value, or the decoded stamp for this pts was already evicted/pre-HUD). Fired from the
+    /// codec's render-callback thread, not the decode thread — the lock makes that safe.
+    // Driven only by the android-only decode path; unreferenced on the host build — expected.
+    #[cfg_attr(not(target_os = "android"), allow(dead_code))]
+    pub fn note_displayed(&self, e2e_us: Option<u64>, display_us: Option<u64>) {
+        if !self.enabled.load(Ordering::Relaxed) {
+            return; // HUD hidden — skip the lock (the callback already skipped the clock reads)
+        }
+        // Poison-proof for the same reason as `note_received`.
+        let mut g = self
+            .inner
+            .lock()
+            .unwrap_or_else(std::sync::PoisonError::into_inner);
+        if let Some(l) = e2e_us {
+            g.e2e_disp_us.push(l);
+        }
+        if let Some(l) = display_us {
+            g.display_us.push(l);
+        }
+    }
+
     /// Compute the window's rates + latency percentiles, then reset for the next window.
-    pub fn drain(&self) -> Snapshot {
+    /// `dropped_total` / `fec_total` are the connector's session-cumulative counters now; the
+    /// snapshot's `lost` / `fec` are their deltas since the last drain (or the enabling show).
+    pub fn drain(&self, dropped_total: u64, fec_total: u64) -> Snapshot {
         // Poison-proof for the same reason as `note_received` — a poisoned window still drains
         // fine.
         let mut g = self
@@ -244,17 +339,27 @@ impl VideoStats {
         g.host_us.sort_unstable();
         g.net_us.sort_unstable();
         g.decode_us.sort_unstable();
+        g.display_us.sort_unstable();
+        g.e2e_disp_us.sort_unstable();
         let snap = Snapshot {
             fps,
             mbps,
             e2e_p50_ms: pctl_ms(&g.e2e_us, 0.50),
             e2e_p95_ms: pctl_ms(&g.e2e_us, 0.95),
+            e2e_disp_p50_ms: pctl_ms(&g.e2e_disp_us, 0.50),
+            e2e_disp_p95_ms: pctl_ms(&g.e2e_disp_us, 0.95),
             hostnet_p50_ms: pctl_ms(&g.hostnet_us, 0.50),
             decode_p50_ms: pctl_ms(&g.decode_us, 0.50),
+            display_p50_ms: pctl_ms(&g.display_us, 0.50),
+            disp_valid: !g.e2e_disp_us.is_empty(),
             host_p50_ms: pctl_ms(&g.host_us, 0.50),
             net_p50_ms: pctl_ms(&g.net_us, 0.50),
             lat_valid: !g.e2e_us.is_empty(),
             skew_corrected: g.skew_corrected,
+            frames: g.frames,
+            lost: dropped_total.saturating_sub(g.last_dropped_total),
+            skipped: g.skipped,
+            fec: fec_total.saturating_sub(g.last_fec_total),
         };
         g.window_start = Instant::now();
         g.frames = 0;
@@ -264,6 +369,11 @@ impl VideoStats {
         g.host_us.clear();
         g.net_us.clear();
         g.decode_us.clear();
+        g.display_us.clear();
+        g.e2e_disp_us.clear();
+        g.skipped = 0;
+        g.last_dropped_total = dropped_total;
+        g.last_fec_total = fec_total;
         snap
     }
 }

clients/android/native/vendor/ndk/.gitignore

@@ -0,0 +1,3 @@
+/target
+**/*.rs.bk
+Cargo.lock

clients/android/native/vendor/ndk/CHANGELOG.md

@@ -0,0 +1,137 @@
+# Unreleased
+
+# 0.9.0 (2024-04-26)
+
+- Move `MediaFormat` from `media::media_codec` to its own `media::media_format` module. (#442)
+- media_format: Expose `MediaFormat::copy()` and `MediaFormat::clear()` from API level 29. (#449)
+- **Breaking:** media_format: Mark all `fn set_*()` and `fn str()` as taking `self` by `&mut`. (#452)
+- **Breaking:** Require all `dyn Fn*` types to implement `Send` when the FFI implementation invokes them on a separate thread: (#455)
+  - `audio::AudioStreamDataCallback`;
+  - `audio::AudioStreamErrorCallback`;
+  - `media::image_reader::BufferRemovedListener`;
+  - `media::image_reader::ImageListener`;
+  - `media::media_codec::ErrorCallback`;
+  - `media::media_codec::FormatChangedCallback`;
+  - `media::media_codec::InputAvailableCallback`;
+  - `media::media_codec::OutputAvailableCallback`.
+- Drop previous `Box`ed callbacks _after_ registering new ones, instead of before. (#455)
+- input_queue: Add `from_java()` constructor, available since API level 33. (#456)
+- event: Add `from_java()` constructors to `KeyEvent` and `MotionEvent`, available since API level 31. (#456)
+- **Breaking:** image_reader: Special-case return statuses in `Image`-acquire functions. (#457)
+- **Breaking:** image_reader: Mark `ImageReader::acquire_latest_image_async()` `unsafe` to match the safety requirements on `ImageReader::acquire_next_image_async()`. (#457)
+- event: Implement `SourceClass` `bitflag` and provide `Source::class()` getter. (#458)
+- Ensure all `bitflags` implementations consider all (including unknown) bits in negation and `all()`. (#458)
+- **Breaking:** Mark all enums as `non_exhaustive` and fix `repr` types. (#459)
+- **Breaking:** native_window: Remove redundant `TRANSFORM_` prefix from `NativeWindowTransform` variants. (#460)
+- **Breaking:** hardware_buffer: Convert `HardwareBufferUsage` to `bitflags`. (#461)
+- bitmap: Guard `BitmapCompressError` behind missing `api-level-30` feature. (#462)
+- native_window: Require linking against `libnativewindow` for most API >= 26 functions. (#465)
+- **Breaking:** audio: Merge `AudioResult` variant enum into `AudioError`. (#467)
+- data_space: Add missing `DataSpaceRange::Unspecified` variant. (#468)
+- **Breaking:** looper: Require `Send` marker when adding fd event callbacks on `ForeignLooper`. (#469)
+- **Breaking:** Upgrade to [`ndk-sys 0.6.0`](../ndk-sys/CHANGELOG.md#060-2024-04-26). (#472)
+
+# 0.8.0 (2023-10-15)
+
+- event: Add `tool_type` getter for `Pointer`. (#323)
+- input_queue: Allow any non-zero return code from `pre_dispatch()` again, as per documentation. (#325)
+- asset: Use entire asset length when mapping buffer. (#387)
+- Bump MSRV to 1.66 for `raw-window-handle 0.5.1`, `num_enum`'s `catch_all` with arbitrary enum discriminants. (#388, #431)
+- Bump optional `jni` dependency for doctest example from `0.19` to `0.21`. (#390)
+- **Breaking:** Upgrade to [`ndk-sys 0.5.0`](../ndk-sys/CHANGELOG.md#050-2023-10-15). (#370)
+- **Breaking:** Upgrade `bitflags` crate from `1` to `2`. (#394)
+- bitmap: Add `try_format()` to `AndroidBitmapInfo` to handle unexpected formats without panicking. (#395)
+- Add `Font` bindings. (#397)
+- **Breaking:** Upgrade `num_enum` crate from `0.5.1` to `0.7`. (#398, #419)
+- **Breaking:** Renamed, moved and flattened "`media`" error types and helpers to a new `media_error` module. (#399, #432)
+- **Breaking:** media_codec: Wrap common dequeued-buffer status codes in enum. (#401)
+- **Breaking:** media_codec: Return `MaybeUninit` bytes in `buffer_mut()`. (#403)
+- native_window: Add `lock()` to blit raw pixel data. (#404)
+- hardware_buffer_format: Add `YCbCr_P010` and `R8_UNORM` variants. (#405)
+- **Breaking:** hardware_buffer_format: Add catch-all variant. (#407)
+- asset: Add missing `is_allocated()` and `open_file_descriptor()` methods. (#409)
+- **Breaking:** media_codec: Add support for asynchronous notification callbacks. (#410)
+- Add panic guards to callbacks. (#412)
+- looper: Add `remove_fd()` to unregister events/callbacks for a file descriptor. (#416)
+- **Breaking:** Use `BorrowedFd` and `OwnedFd` to clarify possible ownership transitions. (#417)
+- **Breaking:** Upgrade to [`ndk-sys 0.5.0`](../ndk-sys/CHANGELOG.md#050-2023-10-15). (#420)
+- Add bindings for `sync.h`. (#423)
+- **Breaking:** bitmap: Provide detailed implementation for `AndroidBitmapInfoFlags`. (#424)
+- native_window: Add `set_buffers_transform()`, `try_allocate_buffers()` and `set_frame_rate*()`. (#425)
+- Add bindings for `ASharedMemory`. (#427)
+- hardware_buffer: Add `id()` to retrieve a system-wide unique identifier for a `HardwareBuffer`. (#428)
+- **Breaking:** bitmap: Strip `Android` prefix from structs and enums, and `Bitmap` from `Result`. (#430)
+- **Breaking:** `raw-window-handle 0.5` support is now behind an _optional_ `rwh_05` crate feature and `raw-window-handle` `0.4` and `0.6` support is provided via the new `rwh_04` and (default-enabled) `rwh_06` crate features. (#434)
+- **Breaking:** looper: Provide `event` value to file descriptor poll callback. (#435)
+- **Breaking:** `HardwareBufferFormat` is no longer exported from `hardware_buffer` and `native_window`, and can only be reached through the `hardware_buffer_format` module. (#436)
+- **Breaking:** `get_` prefixes have been removed from all public functions in light of the [C-GETTER](https://rust-lang.github.io/api-guidelines/naming.html#getter-names-follow-rust-convention-c-getter) convention. (#437)
+- Add `DataSpace` type and relevant functions on `Bitmap` and `NativeWindow`. (#438)
+- bitmap: Add `Bitmap::compress()` and `Bitmap::compress_raw()` functions. (#440)
+- **Breaking:** Turn `BitmapError` into a `non_exhaustive` `enum`. (#440)
+- **Breaking:** audio: Rename `AudioErrorResult` to `AudioResult` and turn into a `non_exhaustive` `enum`. (#441)
+
+# 0.7.0 (2022-07-24)
+
+- hardware_buffer: Make `HardwareBuffer::as_ptr()` public for interop with Vulkan. (#213)
+- **Breaking:** `Configuration::country()` now returns `None` when the country is unset (akin to `Configuration::language()`). (#220)
+- Add `MediaCodec` and `MediaFormat` bindings. (#216)
+- **Breaking:** Upgrade to [`ndk-sys 0.4.0`](../ndk-sys/CHANGELOG.md#040-2022-07-24) and use new `enum` newtype wrappers. (#245)
+- native_window: Use `release`/`acquire` for `Drop` and `Clone` respectively. (#207)
+- **Breaking:** audio: Rename from `aaudio` to `audio` and drop `A` prefix. (#273)
+- Implement `HasRawWindowHandle` directly on `NativeWindow`. (#274, #319)
+- **Breaking:** native_activity: Replace `CStr` return types with `Path`. (#279)
+- native_window: Add `format()` getter and `set_buffers_geometry()` setter. (#276)
+- native_activity: Add `set_window_format()` setter. (#277)
+- native_activity: Add `set_window_flags()` to change window behavior. (#278)
+- Add `SurfaceTexture` bindings. (#267)
+- Improve library and structure documentation, linking back to the NDK docs more rigorously. (#290)
+- **Breaking:** input_queue: `get_event()` now returns a `Result` with `std::io::Error`; `InputQueueError` has been removed. (#292)
+- **Breaking:** input_queue: `has_events()` now returns a `bool` directly without being wrapped in `Result`. (#294)
+- **Breaking:** hardware_buffer: `HardwareBufferError` has been removed and replaced with `std::io::Error` in return types. (#295)
+- Fixed `HardwareBuffer` leak on buffers returned from `AndroidBitmap::get_hardware_buffer()`. (#296)
+- Bump optional `jni` dependency for doctest example from `0.18` to `0.19`. (#300)
+- hardware_buffer: Made `HardwareBufferDesc` fields `pub`. (#313)
+- **Breaking:** Remove `hardware_buffer` and `trace` features in favour of using `api-level-26` or `api-level-23` directly. (#320)
+
+# 0.6.0 (2022-01-05)
+
+- **Breaking:** Upgrade to [`ndk-sys 0.3.0`](../ndk-sys/CHANGELOG.md#030-2022-01-05) and migrate to `jni-sys` types that it now directly uses in its bindings. (#209 / #214)
+
+# 0.5.0 (2021-11-22)
+
+- **Breaking:** Replace `add_fd_with_callback` `ident` with constant value `ALOOPER_POLL_CALLBACK`,
+  as per <https://developer.android.com/ndk/reference/group/looper#alooper_addfd>.
+- **Breaking:** Accept unboxed closure in `add_fd_with_callback`.
+- aaudio: Replace "Added in" comments with missing `#[cfg(feature)]`.
+- aaudio: Add missing `fn get_allowed_capture_policy()`.
+- configuration: Add missing `api-level-30` feature to `fn screen_round()`.
+
+# 0.4.0 (2021-08-02)
+
+- **Breaking:** Model looper file descriptor events integer as `bitflags`.
+
+# 0.3.0 (2021-01-30)
+
+- **Breaking:** Looper `ident` not passed in `data` pointer anymore.
+  `attach_looper` now only sets the `ident` field when attaching an
+  `InputQueue` to a `ForeignLooper`.
+  If you are relying on `Poll::Event::data` to tell event fd and
+  input queue apart, please use `Poll::Event::ident` and the new
+  constants introduced in `ndk-glue`!
+
+# 0.2.1 (2020-10-15)
+
+- Fix documentation build on docs.rs
+
+# 0.2.0 (2020-09-15)
+
+- **Breaking:** Updated to use [ndk-sys 0.2.0](../ndk-sys/CHANGELOG.md#020-2020-09-15)
+- Added `media` bindings
+- Added `bitmap` and `hardware_buffer` bindings
+- Added `aaudio` bindings
+- Fixed assets directory path to be relative to the manifest
+- Added `trace` feature for native tracing
+
+# 0.1.0 (2020-04-22)
+
+- Initial release! 🎉

clients/android/native/vendor/ndk/Cargo.toml

@@ -0,0 +1,125 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies.
+#
+# If you are reading this file be aware that the original Cargo.toml
+# will likely look very different (and much more reasonable).
+# See Cargo.toml.orig for the original contents.
+
+[package]
+edition = "2021"
+rust-version = "1.66"
+name = "ndk"
+version = "0.9.0"
+authors = ["The Rust Mobile contributors"]
+description = "Safe Rust bindings to the Android NDK"
+homepage = "https://github.com/rust-mobile/ndk"
+documentation = "https://docs.rs/ndk"
+readme = "README.md"
+keywords = [
+    "android",
+    "ndk",
+]
+license = "MIT OR Apache-2.0"
+repository = "https://github.com/rust-mobile/ndk"
+
+[package.metadata.docs.rs]
+features = [
+    "jni",
+    "all",
+]
+rustdoc-args = [
+    "--cfg",
+    "docsrs",
+]
+targets = [
+    "aarch64-linux-android",
+    "armv7-linux-androideabi",
+    "i686-linux-android",
+    "x86_64-linux-android",
+]
+
+[dependencies.bitflags]
+version = "2.4"
+
+[dependencies.ffi]
+version = "0.6.0"
+package = "ndk-sys"
+
+[dependencies.jni]
+version = "0.21"
+optional = true
+
+[dependencies.jni-sys]
+version = "0.3"
+
+[dependencies.log]
+version = "0.4.6"
+
+[dependencies.num_enum]
+version = "0.7"
+
+[dependencies.rwh_04]
+version = "0.4"
+optional = true
+package = "raw-window-handle"
+
+[dependencies.rwh_05]
+version = "0.5"
+optional = true
+package = "raw-window-handle"
+
+[dependencies.rwh_06]
+version = "0.6"
+optional = true
+package = "raw-window-handle"
+
+[dependencies.thiserror]
+version = "1.0.23"
+
+[dev-dependencies.libc]
+version = "0.2.3"
+
+[features]
+all = [
+    "audio",
+    "bitmap",
+    "media",
+    "nativewindow",
+    "sync",
+    "api-level-33",
+    "rwh_04",
+    "rwh_05",
+    "rwh_06",
+]
+api-level-23 = []
+api-level-24 = ["api-level-23"]
+api-level-25 = ["api-level-24"]
+api-level-26 = ["api-level-25"]
+api-level-27 = ["api-level-26"]
+api-level-28 = ["api-level-27"]
+api-level-29 = ["api-level-28"]
+api-level-30 = ["api-level-29"]
+api-level-31 = ["api-level-30"]
+api-level-32 = ["api-level-31"]
+api-level-33 = ["api-level-32"]
+audio = [
+    "ffi/audio",
+    "api-level-26",
+]
+bitmap = ["ffi/bitmap"]
+default = ["rwh_06"]
+media = ["ffi/media"]
+nativewindow = ["ffi/nativewindow"]
+sync = [
+    "ffi/sync",
+    "api-level-26",
+]
+test = [
+    "ffi/test",
+    "jni",
+    "all",
+]

clients/android/native/vendor/ndk/README.md

@@ -0,0 +1,21 @@
+[![ci](https://github.com/rust-mobile/ndk/actions/workflows/rust.yml/badge.svg)](https://github.com/rust-mobile/ndk/actions/workflows/rust.yml) ![MIT license](https://img.shields.io/badge/License-MIT-green.svg) ![APACHE2 license](https://img.shields.io/badge/License-APACHE2-green.svg)
+
+Rust bindings to the [Android NDK](https://developer.android.com/ndk)
+
+Name | Description | Badges
+--- | --- | ---
+[`ndk-sys`](./ndk-sys) | Raw FFI bindings to the NDK | [![crates.io](https://img.shields.io/crates/v/ndk-sys.svg)](https://crates.io/crates/ndk-sys) [![Docs](https://docs.rs/ndk-sys/badge.svg)](https://docs.rs/ndk-sys) [![MSRV](https://img.shields.io/badge/rustc-1.60.0+-ab6000.svg)](https://blog.rust-lang.org/2022/04/07/Rust-1.60.0.html)
+[`ndk`](./ndk) | Safe abstraction of the bindings | [![crates.io](https://img.shields.io/crates/v/ndk.svg)](https://crates.io/crates/ndk) [![Docs](https://docs.rs/ndk/badge.svg)](https://docs.rs/ndk) [![MSRV](https://img.shields.io/badge/rustc-1.64.0+-ab6000.svg)](https://blog.rust-lang.org/2022/09/22/Rust-1.64.0.html)
+
+See these [`ndk-examples`](https://github.com/rust-mobile/cargo-apk/tree/main/examples/examples) and these [`rust-android-examples`](https://github.com/rust-mobile/rust-android-examples) for examples using the NDK.
+
+> [!IMPORTANT]
+> This repository was recently [modularized](https://github.com/rust-mobile/ndk/issues/372) and the following crates were split into separate repositories:
+>
+> Crate | New Location | Notes
+> ------|--------------|------
+> ndk-context | https://github.com/rust-mobile/ndk-context |
+> ndk-glue | https://github.com/rust-mobile/ndk-glue | ⛔ _deprecated_ - see [android-activity](https://github.com/rust-mobile/android-activity)
+> ndk-macro | https://github.com/rust-mobile/ndk-glue | ⛔ _deprecated_ - see [android-activity](https://github.com/rust-mobile/android-activity)
+> ndk-build | https://github.com/rust-mobile/cargo-apk | ⛔ _deprecated_ - see [xbuild](https://github.com/rust-mobile/xbuild)
+> cargo-apk | https://github.com/rust-mobile/cargo-apk | ⛔ _deprecated_ - see [xbuild](https://github.com/rust-mobile/xbuild)

clients/android/native/vendor/ndk/README.punktfunk.md

@@ -0,0 +1,14 @@
+# Vendored `ndk` 0.9.0 (patched)
+
+Verbatim copy of the published `ndk` 0.9.0 crate (https://crates.io/crates/ndk,
+MIT OR Apache-2.0, © the rust-mobile contributors), wired in via `[patch.crates-io]`
+in the workspace root.
+
+**The only change** is in `src/media/media_codec.rs`: `MediaCodec::as_ptr` is made
+`pub` (upstream keeps it private) so the Android client can register
+`AMediaCodec_setOnFrameRenderedCallback` through `ndk-sys` — the render-timestamp
+callback behind the HUD's `display` stage (`design/stats-unification.md`), which the
+wrapper doesn't expose. Grep for `punktfunk vendored patch` to find it.
+
+Drop this vendor copy when upstream exposes the raw pointer or a frame-rendered
+callback binding (tracked against https://github.com/rust-mobile/ndk).

clients/android/native/vendor/ndk/src/asset.rs

@@ -0,0 +1,323 @@
+//! Bindings for [`AAsset`], [`AAssetDir`] and [`AAssetManager`]
+//!
+//! [`AAsset`]: https://developer.android.com/ndk/reference/group/asset#aasset
+//! [`AAssetDir`]: https://developer.android.com/ndk/reference/group/asset#aassetdir
+//! [`AAssetManager`]: https://developer.android.com/ndk/reference/group/asset#aassetmanager
+
+use std::{
+    ffi::{CStr, CString},
+    io,
+    os::fd::{FromRawFd, OwnedFd},
+    ptr::NonNull,
+};
+
+/// A native [`AAssetManager *`]
+///
+/// [`AAssetManager *`]: https://developer.android.com/ndk/reference/group/asset#aassetmanager
+#[derive(Debug)]
+#[doc(alias = "AAssetManager")]
+pub struct AssetManager {
+    ptr: NonNull<ffi::AAssetManager>,
+}
+
+// AAssetManager is thread safe.
+// See https://developer.android.com/ndk/reference/group/asset#aassetmanager
+unsafe impl Send for AssetManager {}
+unsafe impl Sync for AssetManager {}
+
+impl AssetManager {
+    /// Create an `AssetManager` from a pointer
+    ///
+    /// # Safety
+    /// By calling this function, you assert that the pointer is a valid pointer to a native
+    /// `AAssetManager`.
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AAssetManager>) -> Self {
+        Self { ptr }
+    }
+
+    /// Returns the pointer to the native `AAssetManager`.
+    pub fn ptr(&self) -> NonNull<ffi::AAssetManager> {
+        self.ptr
+    }
+
+    /// Open the asset. Returns [`None`] if opening the asset fails.
+    ///
+    /// This currently always opens the asset in the streaming mode.
+    #[doc(alias = "AAssetManager_open")]
+    pub fn open(&self, filename: &CStr) -> Option<Asset> {
+        unsafe {
+            let ptr = ffi::AAssetManager_open(
+                self.ptr.as_ptr(),
+                filename.as_ptr(),
+                ffi::AASSET_MODE_STREAMING as i32,
+            );
+            Some(Asset::from_ptr(NonNull::new(ptr)?))
+        }
+    }
+
+    /// Open an asset directory. Returns [`None`] if opening the directory fails.
+    #[doc(alias = "AAssetManager_openDir")]
+    pub fn open_dir(&self, filename: &CStr) -> Option<AssetDir> {
+        unsafe {
+            let ptr = ffi::AAssetManager_openDir(self.ptr.as_ptr(), filename.as_ptr());
+            Some(AssetDir::from_ptr(NonNull::new(ptr)?))
+        }
+    }
+}
+
+/// A native [`AAssetDir *`]
+///
+/// ```no_run
+/// # use std::ffi::CString;
+/// # use ndk::asset::AssetManager;
+/// # let asset_manager: AssetManager = unimplemented!();
+/// use std::io::Read;
+///
+/// let mut my_dir = asset_manager
+///     .open_dir(&CString::new("my_dir").unwrap())
+///     .expect("Could not open directory");
+///
+/// // Use it as an iterator
+/// let all_files = my_dir.collect::<Vec<CString>>();
+///
+/// // Reset the iterator
+/// my_dir.rewind();
+///
+/// // Use .with_next() to iterate without allocating `CString`s
+/// while let Some(asset) = my_dir.with_next(|cstr| asset_manager.open(cstr).unwrap()) {
+///     let mut text = String::new();
+///     asset.read_to_string(&mut text);
+///     // ...
+/// }
+/// ```
+///
+/// [`AAssetDir *`]: https://developer.android.com/ndk/reference/group/asset#aassetdir
+#[derive(Debug)]
+#[doc(alias = "AAssetDir")]
+pub struct AssetDir {
+    ptr: NonNull<ffi::AAssetDir>,
+}
+
+// It's unclear if AAssetDir is thread safe.
+// However, AAsset is not, so there's a good chance that AAssetDir is not either.
+
+impl Drop for AssetDir {
+    #[doc(alias = "AAssetDir_close")]
+    fn drop(&mut self) {
+        unsafe { ffi::AAssetDir_close(self.ptr.as_ptr()) }
+    }
+}
+
+impl AssetDir {
+    /// Construct an `AssetDir` from the native `AAssetDir *`.  This gives ownership of the
+    /// `AAssetDir *` to the `AssetDir`, which will handle closing the asset.  Avoid using
+    /// the pointer after calling this function.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it points to a valid native `AAssetDir`.
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AAssetDir>) -> Self {
+        Self { ptr }
+    }
+
+    /// The corresponding native `AAssetDir *`
+    pub fn ptr(&self) -> NonNull<ffi::AAssetDir> {
+        self.ptr
+    }
+
+    /// Get the next filename, if any, and process it.  Like [`Iterator::next()`], but performs
+    /// no additional allocation.
+    ///
+    /// The filenames are in the correct format to be passed to [`AssetManager::open()`].
+    #[doc(alias = "AAssetDir_getNextFileName")]
+    pub fn with_next<T>(&mut self, f: impl for<'a> FnOnce(&'a CStr) -> T) -> Option<T> {
+        unsafe {
+            let next_name = ffi::AAssetDir_getNextFileName(self.ptr.as_ptr());
+            if next_name.is_null() {
+                None
+            } else {
+                Some(f(CStr::from_ptr(next_name)))
+            }
+        }
+    }
+
+    /// Reset the iteration state
+    #[doc(alias = "AAssetDir_rewind")]
+    pub fn rewind(&mut self) {
+        unsafe {
+            ffi::AAssetDir_rewind(self.ptr.as_ptr());
+        }
+    }
+}
+
+impl Iterator for AssetDir {
+    type Item = CString;
+
+    fn next(&mut self) -> Option<CString> {
+        self.with_next(|cstr| cstr.to_owned())
+    }
+}
+
+/// A native [`AAsset *`], opened in streaming mode
+///
+/// ```no_run
+/// # use std::ffi::CString;
+/// # use ndk::asset::AssetManager;
+/// # let asset_manager: AssetManager = unimplemented!();
+/// use std::io::Read;
+///
+/// let asset = asset_manager
+///     .open(&CString::new("path/to/asset").unwrap())
+///     .expect("Could not open asset");
+///
+/// let mut data = vec![];
+/// asset.read_to_end(&mut data);
+/// // ... use data ...
+/// ```
+///
+/// [`AAsset *`]: https://developer.android.com/ndk/reference/group/asset#aasset
+#[derive(Debug)]
+#[doc(alias = "AAsset")]
+pub struct Asset {
+    ptr: NonNull<ffi::AAsset>,
+}
+
+// AAsset is *not* thread safe.
+// See https://developer.android.com/ndk/reference/group/asset#aasset
+
+impl Drop for Asset {
+    #[doc(alias = "AAsset_close")]
+    fn drop(&mut self) {
+        unsafe { ffi::AAsset_close(self.ptr.as_ptr()) }
+    }
+}
+
+impl Asset {
+    /// Construct an `Asset` from the native `AAsset *`.  This gives ownership of the `AAsset *` to
+    /// the `Asset`, which will handle closing the asset.  Avoid using the pointer after calling
+    /// this function.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it points to a valid native `AAsset`, open
+    /// in the streaming mode.
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AAsset>) -> Self {
+        Self { ptr }
+    }
+
+    /// The corresponding native `AAsset *`
+    pub fn ptr(&self) -> NonNull<ffi::AAsset> {
+        self.ptr
+    }
+
+    /// Returns the total length of the asset, in bytes
+    #[doc(alias = "AAsset_getLength64")]
+    pub fn length(&self) -> usize {
+        unsafe { ffi::AAsset_getLength64(self.ptr.as_ptr()) as usize }
+    }
+
+    /// Returns the remaining length of the asset, in bytes
+    #[doc(alias = "AAsset_getRemainingLength64")]
+    pub fn remaining_length(&self) -> usize {
+        unsafe { ffi::AAsset_getRemainingLength64(self.ptr.as_ptr()) as usize }
+    }
+
+    /// Maps all data into a buffer and returns it
+    #[doc(alias = "AAsset_getBuffer")]
+    pub fn buffer(&mut self) -> io::Result<&[u8]> {
+        unsafe {
+            let buf_ptr = ffi::AAsset_getBuffer(self.ptr.as_ptr());
+            if buf_ptr.is_null() {
+                Err(io::Error::new(
+                    io::ErrorKind::Other,
+                    "Android Asset error creating buffer",
+                ))
+            } else {
+                Ok(std::slice::from_raw_parts(
+                    buf_ptr as *const u8,
+                    self.length(),
+                ))
+            }
+        }
+    }
+
+    /// Returns whether this asset's internal buffer is allocated in ordinary RAM (i.e. not `mmap`ped).
+    #[doc(alias = "AAsset_isAllocated")]
+    pub fn is_allocated(&self) -> bool {
+        unsafe { ffi::AAsset_isAllocated(self.ptr.as_ptr()) != 0 }
+    }
+
+    /// Open a new file descriptor that can be used to read the asset data.
+    ///
+    /// Returns an error if direct fd access is not possible (for example, if the asset is compressed).
+    #[doc(alias = "AAsset_openFileDescriptor64")]
+    pub fn open_file_descriptor(&self) -> io::Result<OpenedFileDescriptor> {
+        let mut offset = 0;
+        let mut size = 0;
+        let res =
+            unsafe { ffi::AAsset_openFileDescriptor64(self.ptr.as_ptr(), &mut offset, &mut size) };
+        if res >= 0 {
+            Ok(OpenedFileDescriptor {
+                fd: unsafe { OwnedFd::from_raw_fd(res) },
+                offset: offset as usize,
+                size: size as usize,
+            })
+        } else {
+            Err(io::Error::new(
+                io::ErrorKind::Other,
+                "Android Asset openFileDescriptor error",
+            ))
+        }
+    }
+}
+
+impl io::Read for Asset {
+    #[doc(alias = "AAsset_read")]
+    fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+        unsafe {
+            let res = ffi::AAsset_read(self.ptr.as_ptr(), buf.as_mut_ptr() as *mut _, buf.len());
+            if res >= 0 {
+                Ok(res as usize)
+            } else {
+                Err(io::Error::new(
+                    io::ErrorKind::Other,
+                    "Android Asset read error",
+                ))
+            }
+        }
+    }
+}
+
+impl io::Seek for Asset {
+    #[doc(alias = "AAsset_seek64")]
+    fn seek(&mut self, seek: io::SeekFrom) -> io::Result<u64> {
+        unsafe {
+            let res = match seek {
+                io::SeekFrom::Start(x) => {
+                    ffi::AAsset_seek64(self.ptr.as_ptr(), x as i64, ffi::SEEK_SET as i32)
+                }
+                io::SeekFrom::Current(x) => {
+                    ffi::AAsset_seek64(self.ptr.as_ptr(), x, ffi::SEEK_CUR as i32)
+                }
+                io::SeekFrom::End(x) => {
+                    ffi::AAsset_seek64(self.ptr.as_ptr(), x, ffi::SEEK_END as i32)
+                }
+            };
+            if res < 0 {
+                Err(io::Error::new(
+                    io::ErrorKind::Other,
+                    "Android Asset seek error",
+                ))
+            } else {
+                Ok(res as u64)
+            }
+        }
+    }
+}
+
+/// Contains the opened file descriptor returned by [`Asset::open_file_descriptor()`], together
+/// with the offset and size of the given asset within that file descriptor.
+#[derive(Debug)]
+pub struct OpenedFileDescriptor {
+    pub fd: OwnedFd,
+    pub offset: usize,
+    pub size: usize,
+}

clients/android/native/vendor/ndk/src/bitmap.rs

@@ -0,0 +1,489 @@
+//! Bindings for [`AndroidBitmap`] functions
+//!
+//! These functions operate directly on a JNI [`android.graphics.Bitmap`] instance.
+//!
+//! [`AndroidBitmap`]: https://developer.android.com/ndk/reference/group/bitmap
+//! [`android.graphics.Bitmap`]: https://developer.android.com/reference/android/graphics/Bitmap
+#![cfg(feature = "bitmap")]
+
+use jni_sys::{jobject, JNIEnv};
+use num_enum::{FromPrimitive, IntoPrimitive};
+use std::{error, fmt, mem::MaybeUninit};
+
+#[cfg(feature = "api-level-30")]
+use crate::data_space::DataSpace;
+#[cfg(feature = "api-level-30")]
+use crate::hardware_buffer::HardwareBufferRef;
+
+#[repr(i32)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[non_exhaustive]
+pub enum BitmapError {
+    #[doc(alias = "ANDROID_BITMAP_RESULT_ALLOCATION_FAILED")]
+    AllocationFailed = ffi::ANDROID_BITMAP_RESULT_ALLOCATION_FAILED,
+    #[doc(alias = "ANDROID_BITMAP_RESULT_BAD_PARAMETER")]
+    BadParameter = ffi::ANDROID_BITMAP_RESULT_BAD_PARAMETER,
+    #[doc(alias = "ANDROID_BITMAP_RESULT_JNI_EXCEPTION")]
+    JniException = ffi::ANDROID_BITMAP_RESULT_JNI_EXCEPTION,
+
+    // Use the SUCCESS discriminant, as no-one will be able to call `as i32` and only has access to
+    // the constants via `From` provided by `IntoPrimitive` which reads the contained value.
+    // An autogenerated `<previous variant> + 1` discriminant is normally fine, except that the
+    // previous variant is negative and `+ 1` would match the variant before that.
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32) = ffi::ANDROID_BITMAP_RESULT_SUCCESS,
+}
+
+impl fmt::Display for BitmapError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl error::Error for BitmapError {}
+
+pub type Result<T, E = BitmapError> = std::result::Result<T, E>;
+
+impl BitmapError {
+    pub(crate) fn from_status(status: i32) -> Result<()> {
+        match status {
+            ffi::ANDROID_BITMAP_RESULT_SUCCESS => Ok(()),
+            x => Err(Self::from(x)),
+        }
+    }
+}
+
+fn construct<T>(with_ptr: impl FnOnce(*mut T) -> i32) -> Result<T> {
+    let mut result = MaybeUninit::uninit();
+    let status = with_ptr(result.as_mut_ptr());
+    BitmapError::from_status(status).map(|()| unsafe { result.assume_init() })
+}
+
+#[repr(i32)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, IntoPrimitive, FromPrimitive)]
+#[allow(non_camel_case_types)]
+#[doc(alias = "AndroidBitmapFormat")]
+#[non_exhaustive]
+pub enum BitmapFormat {
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_NONE")]
+    NONE = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_NONE.0 as i32,
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_RGBA_8888")]
+    RGBA_8888 = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_RGBA_8888.0 as i32,
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_RGB_565")]
+    RGB_565 = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_RGB_565.0 as i32,
+    #[deprecated = "Deprecated in API level 13. Because of the poor quality of this configuration, it is advised to use ARGB_8888 instead."]
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_RGBA_4444")]
+    RGBA_4444 = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_RGBA_4444.0 as i32,
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_A_8")]
+    A_8 = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_A_8.0 as i32,
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_RGBA_F16")]
+    RGBA_F16 = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_RGBA_F16.0 as i32,
+    #[doc(alias = "ANDROID_BITMAP_FORMAT_RGBA_1010102")]
+    RGBA_1010102 = ffi::AndroidBitmapFormat::ANDROID_BITMAP_FORMAT_RGBA_1010102.0 as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+/// An immediate wrapper over [`android.graphics.Bitmap`]
+///
+/// [`android.graphics.Bitmap`]: https://developer.android.com/reference/android/graphics/Bitmap
+#[derive(Debug)]
+pub struct Bitmap {
+    env: *mut JNIEnv,
+    inner: jobject,
+}
+
+impl Bitmap {
+    /// Create a [`Bitmap`] wrapper from JNI pointers
+    ///
+    /// # Safety
+    /// This function should be called with a healthy JVM pointer and with a non-null
+    /// [`android.graphics.Bitmap`], which must be kept alive on the Java/Kotlin side.
+    ///
+    /// [`android.graphics.Bitmap`]: https://developer.android.com/reference/android/graphics/Bitmap
+    pub unsafe fn from_jni(env: *mut JNIEnv, bitmap: jobject) -> Self {
+        Self { env, inner: bitmap }
+    }
+
+    /// Fills out and returns the [`BitmapInfo`] struct for the given Java bitmap object.
+    #[doc(alias = "AndroidBitmap_getInfo")]
+    pub fn info(&self) -> Result<BitmapInfo> {
+        let inner =
+            construct(|res| unsafe { ffi::AndroidBitmap_getInfo(self.env, self.inner, res) })?;
+
+        Ok(BitmapInfo { inner })
+    }
+
+    /// Returns the [`DataSpace`] of this [`Bitmap`].
+    ///
+    /// Note that [`DataSpace`] only exposes a few values. This may return [`DataSpace::Unknown`],
+    /// even for Named ColorSpaces, if they have no corresponding [`DataSpace`].
+    #[cfg(feature = "api-level-30")]
+    #[doc(alias = "AndroidBitmap_getDataSpace")]
+    pub fn data_space(&self) -> DataSpace {
+        let value = unsafe { ffi::AndroidBitmap_getDataSpace(self.env, self.inner) };
+        value.into()
+    }
+
+    /// Attempt to lock the pixel address.
+    ///
+    /// Locking will ensure that the memory for the pixels will not move until the
+    /// [`Bitmap::unlock_pixels()`] call, and ensure that, if the pixels had been previously purged,
+    /// they will have been restored.
+    ///
+    /// If this call succeeds, it must be balanced by a call to [`Bitmap::unlock_pixels()`], after
+    /// which time the address of the pixels should no longer be used.
+    #[doc(alias = "AndroidBitmap_lockPixels")]
+    pub fn lock_pixels(&self) -> Result<*mut std::os::raw::c_void> {
+        construct(|res| unsafe { ffi::AndroidBitmap_lockPixels(self.env, self.inner, res) })
+    }
+
+    /// Call this to balance a successful call to [`Bitmap::lock_pixels()`].
+    #[doc(alias = "AndroidBitmap_unlockPixels")]
+    pub fn unlock_pixels(&self) -> Result<()> {
+        let status = unsafe { ffi::AndroidBitmap_unlockPixels(self.env, self.inner) };
+        BitmapError::from_status(status)
+    }
+
+    /// Retrieve the native object associated with an [`ffi::ANDROID_BITMAP_FLAGS_IS_HARDWARE`]
+    /// [`Bitmap`] (requires [`BitmapInfoFlags::is_hardware()`] on [`BitmapInfo::flags()`] to return
+    /// [`true`]).
+    ///
+    /// Client must not modify it while a [`Bitmap`] is wrapping it.
+    #[cfg(feature = "api-level-30")]
+    #[doc(alias = "AndroidBitmap_getHardwareBuffer")]
+    pub fn hardware_buffer(&self) -> Result<HardwareBufferRef> {
+        unsafe {
+            let result =
+                construct(|res| ffi::AndroidBitmap_getHardwareBuffer(self.env, self.inner, res))?;
+            let non_null = if cfg!(debug_assertions) {
+                std::ptr::NonNull::new(result).expect("result should never be null")
+            } else {
+                std::ptr::NonNull::new_unchecked(result)
+            };
+            Ok(HardwareBufferRef::from_ptr(non_null))
+        }
+    }
+
+    /// [Lock] the pixels in `self` and compress them as described by [`info()`].
+    ///
+    /// Unlike [`compress_raw()`] this requires a [`Bitmap`] object (as `self`) backed by a
+    /// [`jobject`].
+    ///
+    /// # Parameters
+    /// - `format`: [`BitmapCompressFormat`] to compress to.
+    /// - `quality`: Hint to the compressor, `0-100`.  The value is interpreted differently
+    ///   depending on [`BitmapCompressFormat`].
+    /// - `compress_callback`: Closure that writes the compressed data.  Will be called on the
+    ///   current thread, each time the compressor has compressed more data that is ready to be
+    ///   written.  May be called more than once for each call to this method.
+    ///
+    /// [Lock]: Self::lock_pixels()
+    /// [`info()`]: Self::info()
+    /// [`compress_raw()`]: Self::compress_raw()
+    #[cfg(feature = "api-level-30")]
+    #[doc(alias = "AndroidBitmap_compress")]
+    pub fn compress<F: FnMut(&[u8]) -> Result<(), ()>>(
+        &self,
+        format: BitmapCompressFormat,
+        quality: i32,
+        compress_callback: F,
+    ) -> Result<(), BitmapCompressError> {
+        let info = self.info()?;
+        let data_space = self.data_space();
+        let pixels = self.lock_pixels()?;
+        // SAFETY: When lock_pixels() succeeds, assume it returns a valid pointer that stays
+        // valid until we call unlock_pixels().
+        let result = unsafe {
+            Self::compress_raw(
+                &info,
+                data_space,
+                pixels,
+                format,
+                quality,
+                compress_callback,
+            )
+        };
+        self.unlock_pixels()?;
+        result
+    }
+
+    /// Compress `pixels` as described by `info`.
+    ///
+    /// Unlike [`compress()`] this takes a raw pointer to pixels and does not need a [`Bitmap`]
+    /// object backed by a [`jobject`].
+    ///
+    /// # Parameters
+    /// - `info`: Description of the pixels to compress.
+    /// - `data_space`: [`DataSpace`] describing the color space of the pixels.  Should _not_ be
+    ///   [`DataSpace::Unknown`] [^1].
+    /// - `pixels`: Pointer to pixels to compress.
+    /// - `format`: [`BitmapCompressFormat`] to compress to.
+    /// - `quality`: Hint to the compressor, `0-100`.  The value is interpreted differently
+    ///   depending on [`BitmapCompressFormat`].
+    /// - `compress_callback`: Closure that writes the compressed data.  Will be called on the
+    ///   current thread, each time the compressor has compressed more data that is ready to be
+    ///   written.  May be called more than once for each call to this method.
+    ///
+    /// # Safety
+    /// `pixels` must point to a valid buffer that matches the size, stride and format in `info`.
+    ///
+    /// [`compress()`]: Self::compress()
+    /// [^1]: <https://cs.android.com/android/platform/superproject/main/+/main:frameworks/base/libs/hwui/apex/android_bitmap.cpp;l=275-279;drc=7ba5c2fb3d1e35eb37a9cc522b30ba51f49ea491>
+    #[cfg(feature = "api-level-30")]
+    #[doc(alias = "AndroidBitmap_compress")]
+    pub unsafe fn compress_raw<F: FnMut(&[u8]) -> Result<(), ()>>(
+        info: &BitmapInfo,
+        data_space: DataSpace,
+        pixels: *const std::ffi::c_void,
+        format: BitmapCompressFormat,
+        quality: i32,
+        compress_callback: F,
+    ) -> Result<(), BitmapCompressError> {
+        if data_space == DataSpace::Unknown {
+            return Err(BitmapCompressError::DataSpaceUnknown);
+        }
+
+        use std::{any::Any, ffi::c_void, panic::AssertUnwindSafe};
+        struct CallbackState<F: FnMut(&[u8]) -> Result<(), ()>> {
+            callback: F,
+            panic: Option<Box<dyn Any + Send>>,
+        }
+        let mut cb_state = CallbackState::<F> {
+            callback: compress_callback,
+            panic: None,
+        };
+
+        extern "C" fn compress_cb<F: FnMut(&[u8]) -> Result<(), ()>>(
+            context: *mut c_void,
+            data: *const c_void,
+            size: usize,
+        ) -> bool {
+            // SAFETY: This callback will only be called serially on a single thread. Both the
+            // panic state and the FnMut context need to be available mutably.
+            let cb_state = unsafe { context.cast::<CallbackState<F>>().as_mut() }.unwrap();
+            let data = unsafe { std::slice::from_raw_parts(data.cast(), size) };
+            let panic = std::panic::catch_unwind(AssertUnwindSafe(|| (cb_state.callback)(data)));
+            match panic {
+                Ok(r) => r.is_ok(),
+                Err(e) => {
+                    cb_state.panic = Some(e);
+                    false
+                }
+            }
+        }
+
+        let status = unsafe {
+            ffi::AndroidBitmap_compress(
+                &info.inner,
+                data_space.into(),
+                pixels,
+                format.into(),
+                quality,
+                <*mut _>::cast(&mut cb_state),
+                Some(compress_cb::<F>),
+            )
+        };
+
+        if let Some(panic) = cb_state.panic {
+            std::panic::resume_unwind(panic)
+        }
+
+        Ok(BitmapError::from_status(status)?)
+    }
+}
+
+/// Possible values for [`ffi::ANDROID_BITMAP_FLAGS_ALPHA_MASK`] within [`BitmapInfoFlags`]
+#[repr(u32)]
+#[cfg(feature = "api-level-30")]
+#[derive(Clone, Copy, Debug, IntoPrimitive, FromPrimitive)]
+#[doc(alias = "ANDROID_BITMAP_FLAGS_ALPHA_MASK")]
+#[non_exhaustive]
+pub enum BitmapInfoFlagsAlpha {
+    /// Pixel components are premultiplied by alpha.
+    #[doc(alias = "ANDROID_BITMAP_FLAGS_ALPHA_PREMUL")]
+    Premultiplied = ffi::ANDROID_BITMAP_FLAGS_ALPHA_PREMUL,
+    /// Pixels are opaque.
+    #[doc(alias = "ANDROID_BITMAP_FLAGS_ALPHA_OPAQUE")]
+    Opaque = ffi::ANDROID_BITMAP_FLAGS_ALPHA_OPAQUE,
+    /// Pixel components are independent of alpha.
+    #[doc(alias = "ANDROID_BITMAP_FLAGS_ALPHA_UNPREMUL")]
+    Unpremultiplied = ffi::ANDROID_BITMAP_FLAGS_ALPHA_UNPREMUL,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(u32),
+}
+
+/// Bitfield containing information about the bitmap.
+#[cfg(feature = "api-level-30")]
+#[repr(transparent)]
+#[derive(Clone, Copy, Hash, PartialEq, Eq)]
+pub struct BitmapInfoFlags(u32);
+
+#[cfg(feature = "api-level-30")]
+impl std::fmt::Debug for BitmapInfoFlags {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "BitmapInfoFlags({:#x}, alpha: {:?}, is_hardware: {})",
+            self.0,
+            self.alpha(),
+            self.is_hardware()
+        )
+    }
+}
+
+#[cfg(feature = "api-level-30")]
+impl BitmapInfoFlags {
+    /// Returns the alpha value contained in the [`ffi::ANDROID_BITMAP_FLAGS_ALPHA_MASK`] bit range
+    #[doc(alias = "ANDROID_BITMAP_FLAGS_ALPHA_MASK")]
+    pub fn alpha(self) -> BitmapInfoFlagsAlpha {
+        // Note that ffi::ANDROID_BITMAP_FLAGS_ALPHA_SHIFT is 0 and hence irrelevant.
+        (self.0 & ffi::ANDROID_BITMAP_FLAGS_ALPHA_MASK).into()
+    }
+
+    /// Returns [`true`] when [`ffi::ANDROID_BITMAP_FLAGS_IS_HARDWARE`] is set, meaning this
+    /// [`Bitmap`] uses "HARDWARE Config" and its [`HardwareBufferRef`] can be retrieved via
+    /// [`Bitmap::hardware_buffer()`].
+    #[doc(alias = "ANDROID_BITMAP_FLAGS_IS_HARDWARE")]
+    pub fn is_hardware(self) -> bool {
+        // This constant is defined in a separate anonymous enum which bindgen treats as i32.
+        (self.0 & ffi::ANDROID_BITMAP_FLAGS_IS_HARDWARE as u32) != 0
+    }
+}
+
+/// A native [`AndroidBitmapInfo`]
+///
+/// [`AndroidBitmapInfo`]: https://developer.android.com/ndk/reference/struct/android-bitmap-info#struct_android_bitmap_info
+#[derive(Clone, Copy)]
+#[doc(alias = "AndroidBitmapInfo")]
+pub struct BitmapInfo {
+    inner: ffi::AndroidBitmapInfo,
+}
+
+impl std::fmt::Debug for BitmapInfo {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        let mut f = f.debug_struct("BitmapInfo");
+        f.field("width", &self.width())
+            .field("height", &self.height())
+            .field("stride", &self.stride())
+            .field("format", &self.format());
+
+        #[cfg(feature = "api-level-30")]
+        f.field("flags", &self.flags());
+
+        f.finish()
+    }
+}
+
+impl BitmapInfo {
+    pub fn new(width: u32, height: u32, stride: u32, format: BitmapFormat) -> Self {
+        Self {
+            inner: ffi::AndroidBitmapInfo {
+                width,
+                height,
+                stride,
+                format: format.into(),
+                flags: 0,
+            },
+        }
+    }
+
+    #[cfg(feature = "api-level-30")]
+    pub fn new_with_flags(
+        width: u32,
+        height: u32,
+        stride: u32,
+        format: BitmapFormat,
+        flags: BitmapInfoFlags,
+    ) -> Self {
+        Self {
+            inner: ffi::AndroidBitmapInfo {
+                flags: flags.0,
+                ..Self::new(width, height, stride, format).inner
+            },
+        }
+    }
+
+    /// The bitmap width in pixels.
+    pub fn width(&self) -> u32 {
+        self.inner.width
+    }
+
+    /// The bitmap height in pixels.
+    pub fn height(&self) -> u32 {
+        self.inner.height
+    }
+
+    /// The number of byte per row.
+    pub fn stride(&self) -> u32 {
+        self.inner.stride
+    }
+
+    /// Convert the internal, native [`ffi::AndroidBitmapInfo::format`] into a [`BitmapFormat`].
+    pub fn format(&self) -> BitmapFormat {
+        self.inner.format.into()
+    }
+
+    /// Bitfield containing information about the bitmap.
+    #[cfg(feature = "api-level-30")]
+    pub fn flags(&self) -> BitmapInfoFlags {
+        BitmapInfoFlags(self.inner.flags)
+    }
+}
+
+/// Specifies the formats that can be compressed to with [`Bitmap::compress()`] and
+/// [`Bitmap::compress_raw()`].
+#[cfg(feature = "api-level-30")]
+#[repr(i32)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[doc(alias = "AndroidBitmapCompressFormat")]
+#[non_exhaustive]
+pub enum BitmapCompressFormat {
+    /// Compress to the JPEG format.
+    ///
+    /// quality of `0` means compress for the smallest size. `100` means compress for max visual
+    /// quality.
+    #[doc(alias = "ANDROID_BITMAP_COMPRESS_FORMAT_JPEG")]
+    Jpeg = ffi::AndroidBitmapCompressFormat::ANDROID_BITMAP_COMPRESS_FORMAT_JPEG.0 as i32,
+    /// Compress to the PNG format.
+    ///
+    /// PNG is lossless, so quality is ignored.
+    #[doc(alias = "ANDROID_BITMAP_COMPRESS_FORMAT_PNG")]
+    Png = ffi::AndroidBitmapCompressFormat::ANDROID_BITMAP_COMPRESS_FORMAT_PNG.0 as i32,
+    /// Compress to the WEBP lossless format.
+    ///
+    /// quality refers to how much effort to put into compression. A value of `0` means to
+    /// compress quickly, resulting in a relatively large file size. `100` means to spend more time
+    /// compressing, resulting in a smaller file.
+    #[doc(alias = "ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSY")]
+    WebPLossy =
+        ffi::AndroidBitmapCompressFormat::ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSY.0 as i32,
+    /// Compress to the WEBP lossy format.
+    ///
+    /// quality of `0` means compress for the smallest size. `100` means compress for max visual quality.
+    #[doc(alias = "ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSLESS")]
+    WebPLossless =
+        ffi::AndroidBitmapCompressFormat::ANDROID_BITMAP_COMPRESS_FORMAT_WEBP_LOSSLESS.0 as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+/// Encapsulates possible errors returned by [`Bitmap::compress()`] or [`Bitmap::compress_raw()`].
+#[cfg(feature = "api-level-30")]
+#[derive(Debug, thiserror::Error)]
+pub enum BitmapCompressError {
+    #[error(transparent)]
+    BitmapError(#[from] BitmapError),
+    /// [`Bitmap`] compression requires a known [`DataSpace`].  [`DataSpace::Unknown`] is invalid
+    /// even though it is typically treated as `sRGB`, for that [`DataSpace::Srgb`] has to be passed
+    /// explicitly.
+    #[error("The dataspace for this Bitmap is Unknown")]
+    DataSpaceUnknown,
+}

clients/android/native/vendor/ndk/src/configuration.rs

@@ -0,0 +1,600 @@
+//! Bindings for [`AConfiguration`]
+//!
+//! See also the [NDK docs](https://developer.android.com/ndk/reference/group/configuration) for
+//! [`AConfiguration`], as well as the [docs for providing
+//! resources](https://developer.android.com/guide/topics/resources/providing-resources.html),
+//! which explain many of the configuration values.  The [`android.content.res.Configuration`
+//! javadoc](https://developer.android.com/reference/android/content/res/Configuration.html) may
+//! also have useful information.
+//!
+//! [`AConfiguration`]: https://developer.android.com/ndk/reference/group/configuration#aconfiguration
+
+use crate::asset::AssetManager;
+use num_enum::{FromPrimitive, IntoPrimitive};
+use std::fmt;
+use std::ptr::NonNull;
+
+/// A native [`AConfiguration *`]
+///
+/// [`Configuration`] is an opaque type used to get and set various subsystem configurations.
+///
+/// [`AConfiguration *`]: https://developer.android.com/ndk/reference/group/configuration#aconfiguration
+pub struct Configuration {
+    ptr: NonNull<ffi::AConfiguration>,
+}
+
+unsafe impl Send for Configuration {}
+unsafe impl Sync for Configuration {}
+
+impl Drop for Configuration {
+    fn drop(&mut self) {
+        unsafe { ffi::AConfiguration_delete(self.ptr.as_ptr()) }
+    }
+}
+
+impl Clone for Configuration {
+    fn clone(&self) -> Self {
+        let mut new = Self::new();
+        new.copy(self);
+        new
+    }
+}
+
+impl PartialEq for Configuration {
+    fn eq(&self, other: &Self) -> bool {
+        self.diff(other).0 == 0
+    }
+}
+impl Eq for Configuration {}
+
+impl fmt::Debug for Configuration {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("Configuration")
+            .field("mcc", &self.mcc())
+            .field("mnc", &self.mnc())
+            .field("lang", &self.language())
+            .field("country", &self.country())
+            .field("orientation", &self.orientation())
+            .field("touchscreen", &self.touchscreen())
+            .field("density", &self.density())
+            .field("keyboard", &self.keyboard())
+            .field("navigation", &self.navigation())
+            .field("keys_hidden", &self.keys_hidden())
+            .field("nav_hidden", &self.nav_hidden())
+            .field("sdk_version", &self.sdk_version())
+            .field("screen_size", &self.screen_size())
+            .field("screen_long", &self.screen_long())
+            .field("ui_mode_type", &self.ui_mode_type())
+            .field("ui_mode_night", &self.ui_mode_night())
+            .finish()
+    }
+}
+
+impl Configuration {
+    /// Construct a `Configuration` from a pointer.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it is a valid pointer to a native
+    /// `AConfiguration`, and give ownership of it to the `Configuration` instance.
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AConfiguration>) -> Self {
+        Self { ptr }
+    }
+
+    /// Create a new `Configuration`, with the same contents as the `AConfiguration` referenced by
+    /// the pointer.
+    ///
+    /// This is useful if you have a pointer, but not ownership of it.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it is a valid pointer to a native
+    /// `AConfiguration`.
+    pub unsafe fn clone_from_ptr(ptr: NonNull<ffi::AConfiguration>) -> Self {
+        let conf = Self::new();
+        ffi::AConfiguration_copy(conf.ptr.as_ptr(), ptr.as_ptr());
+        conf
+    }
+
+    /// The pointer to the native `AConfiguration`.  Keep in mind that the `Configuration` object
+    /// still has ownership, and will free it when dropped.
+    pub fn ptr(&self) -> NonNull<ffi::AConfiguration> {
+        self.ptr
+    }
+
+    pub fn from_asset_manager(am: &AssetManager) -> Self {
+        let config = Self::new();
+        unsafe {
+            ffi::AConfiguration_fromAssetManager(config.ptr().as_mut(), am.ptr().as_mut());
+        }
+        config
+    }
+
+    /// Create a new `Configuration`, with none of the values set.
+    pub fn new() -> Self {
+        unsafe {
+            Self {
+                ptr: NonNull::new(ffi::AConfiguration_new()).unwrap(),
+            }
+        }
+    }
+
+    /// `dest.copy(&src)` copies the contents of `src` to `dest`
+    pub fn copy(&mut self, other: &Self) {
+        unsafe { ffi::AConfiguration_copy(self.ptr.as_ptr(), other.ptr.as_ptr()) }
+    }
+
+    /// Information about what fields differ between the two configurations
+    pub fn diff(&self, other: &Self) -> DiffResult {
+        unsafe {
+            DiffResult(ffi::AConfiguration_diff(self.ptr.as_ptr(), other.ptr.as_ptr()) as u32)
+        }
+    }
+
+    /// Returns false if anything in `self` conflicts with `requested`
+    pub fn matches(&self, requested: &Self) -> bool {
+        unsafe { ffi::AConfiguration_match(self.ptr.as_ptr(), requested.ptr.as_ptr()) != 0 }
+    }
+
+    /// Returns the country code, as a [`String`] of two characters, if set
+    pub fn country(&self) -> Option<String> {
+        let mut chars = [0u8; 2];
+        unsafe {
+            ffi::AConfiguration_getCountry(self.ptr.as_ptr(), chars.as_mut_ptr().cast());
+        }
+        if chars[0] == 0 {
+            None
+        } else {
+            Some(std::str::from_utf8(chars.as_slice()).unwrap().to_owned())
+        }
+    }
+
+    /// Returns the screen density in dpi.
+    ///
+    /// On some devices it can return values outside of the density enum.
+    pub fn density(&self) -> Option<u32> {
+        let density = unsafe { ffi::AConfiguration_getDensity(self.ptr.as_ptr()) as u32 };
+        match density {
+            ffi::ACONFIGURATION_DENSITY_DEFAULT => Some(160),
+            ffi::ACONFIGURATION_DENSITY_ANY => None,
+            ffi::ACONFIGURATION_DENSITY_NONE => None,
+            density => Some(density),
+        }
+    }
+
+    /// Returns the keyboard type.
+    pub fn keyboard(&self) -> Keyboard {
+        unsafe { ffi::AConfiguration_getKeyboard(self.ptr.as_ptr()).into() }
+    }
+
+    /// Returns keyboard visibility/availability.
+    pub fn keys_hidden(&self) -> KeysHidden {
+        unsafe { ffi::AConfiguration_getKeysHidden(self.ptr.as_ptr()).into() }
+    }
+
+    /// Returns the language, as a [`String`] of two characters, if set
+    pub fn language(&self) -> Option<String> {
+        let mut chars = [0u8; 2];
+        unsafe {
+            ffi::AConfiguration_getLanguage(self.ptr.as_ptr(), chars.as_mut_ptr().cast());
+        }
+        if chars[0] == 0 {
+            None
+        } else {
+            Some(std::str::from_utf8(chars.as_slice()).unwrap().to_owned())
+        }
+    }
+
+    /// Returns the layout direction
+    pub fn layout_direction(&self) -> LayoutDir {
+        unsafe { ffi::AConfiguration_getLayoutDirection(self.ptr.as_ptr()).into() }
+    }
+
+    /// Returns the mobile country code.
+    pub fn mcc(&self) -> i32 {
+        unsafe { ffi::AConfiguration_getMcc(self.ptr.as_ptr()) }
+    }
+
+    /// Returns the mobile network code, if one is defined
+    pub fn mnc(&self) -> Option<i32> {
+        unsafe {
+            match ffi::AConfiguration_getMnc(self.ptr.as_ptr()) {
+                0 => None,
+                x if x == ffi::ACONFIGURATION_MNC_ZERO as i32 => Some(0),
+                x => Some(x),
+            }
+        }
+    }
+
+    pub fn nav_hidden(&self) -> NavHidden {
+        unsafe { ffi::AConfiguration_getNavHidden(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn navigation(&self) -> Navigation {
+        unsafe { ffi::AConfiguration_getNavigation(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn orientation(&self) -> Orientation {
+        unsafe { ffi::AConfiguration_getOrientation(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn screen_height_dp(&self) -> Option<i32> {
+        unsafe {
+            let height = ffi::AConfiguration_getScreenHeightDp(self.ptr.as_ptr());
+            if height == ffi::ACONFIGURATION_SCREEN_HEIGHT_DP_ANY as i32 {
+                None
+            } else {
+                Some(height)
+            }
+        }
+    }
+
+    pub fn screen_width_dp(&self) -> Option<i32> {
+        unsafe {
+            let width = ffi::AConfiguration_getScreenWidthDp(self.ptr.as_ptr());
+            if width == ffi::ACONFIGURATION_SCREEN_WIDTH_DP_ANY as i32 {
+                None
+            } else {
+                Some(width)
+            }
+        }
+    }
+
+    pub fn screen_long(&self) -> ScreenLong {
+        unsafe { ffi::AConfiguration_getScreenLong(self.ptr.as_ptr()).into() }
+    }
+
+    #[cfg(feature = "api-level-30")]
+    pub fn screen_round(&self) -> ScreenRound {
+        unsafe { ffi::AConfiguration_getScreenRound(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn screen_size(&self) -> ScreenSize {
+        unsafe { ffi::AConfiguration_getScreenSize(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn sdk_version(&self) -> i32 {
+        unsafe { ffi::AConfiguration_getSdkVersion(self.ptr.as_ptr()) }
+    }
+
+    pub fn smallest_screen_width_dp(&self) -> Option<i32> {
+        unsafe {
+            let width = ffi::AConfiguration_getSmallestScreenWidthDp(self.ptr.as_ptr());
+            if width == ffi::ACONFIGURATION_SMALLEST_SCREEN_WIDTH_DP_ANY as i32 {
+                None
+            } else {
+                Some(width)
+            }
+        }
+    }
+
+    pub fn touchscreen(&self) -> Touchscreen {
+        unsafe { ffi::AConfiguration_getTouchscreen(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn ui_mode_night(&self) -> UiModeNight {
+        unsafe { ffi::AConfiguration_getUiModeNight(self.ptr.as_ptr()).into() }
+    }
+
+    pub fn ui_mode_type(&self) -> UiModeType {
+        unsafe { ffi::AConfiguration_getUiModeType(self.ptr.as_ptr()).into() }
+    }
+}
+
+/// A bitfield representing the differences between two [`Configuration`]s
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct DiffResult(pub u32);
+
+impl DiffResult {
+    pub fn mcc(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_MCC != 0
+    }
+    pub fn mnc(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_MNC != 0
+    }
+    pub fn locale(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_LOCALE != 0
+    }
+    pub fn touchscreen(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_TOUCHSCREEN != 0
+    }
+    pub fn keyboard(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_KEYBOARD != 0
+    }
+    pub fn keyboard_hidden(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_KEYBOARD_HIDDEN != 0
+    }
+    pub fn navigation(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_NAVIGATION != 0
+    }
+    pub fn orientation(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_ORIENTATION != 0
+    }
+    pub fn density(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_DENSITY != 0
+    }
+    pub fn screen_size(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_SCREEN_SIZE != 0
+    }
+    pub fn version(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_VERSION != 0
+    }
+    pub fn screen_layout(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_SCREEN_LAYOUT != 0
+    }
+    pub fn ui_mode(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_UI_MODE != 0
+    }
+    pub fn smallest_screen_size(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_SMALLEST_SCREEN_SIZE != 0
+    }
+    pub fn layout_dir(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_LAYOUTDIR != 0
+    }
+    pub fn screen_round(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_SCREEN_ROUND != 0
+    }
+    pub fn color_mode(self) -> bool {
+        self.0 & ffi::ACONFIGURATION_COLOR_MODE != 0
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum Orientation {
+    Any = ffi::ACONFIGURATION_ORIENTATION_ANY as i32,
+    Port = ffi::ACONFIGURATION_ORIENTATION_PORT as i32,
+    Land = ffi::ACONFIGURATION_ORIENTATION_LAND as i32,
+    Square = ffi::ACONFIGURATION_ORIENTATION_SQUARE as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum Touchscreen {
+    Any = ffi::ACONFIGURATION_TOUCHSCREEN_ANY as i32,
+    NoTouch = ffi::ACONFIGURATION_TOUCHSCREEN_NOTOUCH as i32,
+    Stylus = ffi::ACONFIGURATION_TOUCHSCREEN_STYLUS as i32,
+    Finger = ffi::ACONFIGURATION_TOUCHSCREEN_FINGER as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum Density {
+    Default = ffi::ACONFIGURATION_DENSITY_DEFAULT as i32,
+    Low = ffi::ACONFIGURATION_DENSITY_LOW as i32,
+    Medium = ffi::ACONFIGURATION_DENSITY_MEDIUM as i32,
+    TV = ffi::ACONFIGURATION_DENSITY_TV as i32,
+    High = ffi::ACONFIGURATION_DENSITY_HIGH as i32,
+    XHigh = ffi::ACONFIGURATION_DENSITY_XHIGH as i32,
+    XXHigh = ffi::ACONFIGURATION_DENSITY_XXHIGH as i32,
+    XXXHigh = ffi::ACONFIGURATION_DENSITY_XXXHIGH as i32,
+    Any = ffi::ACONFIGURATION_DENSITY_ANY as i32,
+    None = ffi::ACONFIGURATION_DENSITY_NONE as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+impl Density {
+    /// The DPI associated with the density class.
+    /// See [the Android screen density
+    /// docs](https://developer.android.com/training/multiscreen/screendensities#TaskProvideAltBmp)
+    ///
+    /// There are some [`Density`] values that have no associated DPI; these values return [`None`].
+    pub fn dpi(self) -> Option<u32> {
+        match self {
+            Self::Default => Some(160), // Or should it be None?
+            Self::Low => Some(120),
+            Self::Medium => Some(160),
+            Self::High => Some(240),
+            Self::XHigh => Some(320),
+            Self::XXHigh => Some(480),
+            Self::XXXHigh => Some(640),
+            Self::TV => Some(213),
+            Self::Any => None,
+            Self::None => None,
+            // TODO
+            Self::__Unknown(v) => Some(v as u32),
+        }
+    }
+
+    /// The Hi-DPI factor associated with the density class.  This is the factor by which an
+    /// image/resource should be scaled to match its size across devices.  The baseline is a 160dpi
+    /// screen (i.e., Hi-DPI factor = DPI / 160).
+    /// See [the Android screen density
+    /// docs](https://developer.android.com/training/multiscreen/screendensities#TaskProvideAltBmp)
+    ///
+    /// There are some [`Density`] values that have no associated DPI; these values return [`None`].
+    pub fn approx_hidpi_factor(self) -> Option<f64> {
+        match self {
+            Self::Default => Some(1.), // Or should it be None?
+            Self::Low => Some(0.75),
+            Self::Medium => Some(1.),
+            Self::High => Some(1.5),
+            Self::XHigh => Some(2.),
+            Self::XXHigh => Some(3.),
+            Self::XXXHigh => Some(4.),
+            Self::TV => Some(4. / 3.),
+            Self::Any => None,
+            Self::None => None,
+            Self::__Unknown(_) => None,
+        }
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum Keyboard {
+    Any = ffi::ACONFIGURATION_KEYBOARD_ANY as i32,
+    NoKeys = ffi::ACONFIGURATION_KEYBOARD_NOKEYS as i32,
+    Qwerty = ffi::ACONFIGURATION_KEYBOARD_QWERTY as i32,
+    TwelveKey = ffi::ACONFIGURATION_KEYBOARD_12KEY as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum Navigation {
+    Any = ffi::ACONFIGURATION_NAVIGATION_ANY as i32,
+    NoNav = ffi::ACONFIGURATION_NAVIGATION_NONAV as i32,
+    DPad = ffi::ACONFIGURATION_NAVIGATION_DPAD as i32,
+    Trackball = ffi::ACONFIGURATION_NAVIGATION_TRACKBALL as i32,
+    Wheel = ffi::ACONFIGURATION_NAVIGATION_WHEEL as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum KeysHidden {
+    Any = ffi::ACONFIGURATION_KEYSHIDDEN_ANY as i32,
+    No = ffi::ACONFIGURATION_KEYSHIDDEN_NO as i32,
+    Yes = ffi::ACONFIGURATION_KEYSHIDDEN_YES as i32,
+    Soft = ffi::ACONFIGURATION_KEYSHIDDEN_SOFT as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum NavHidden {
+    Any = ffi::ACONFIGURATION_NAVHIDDEN_ANY as i32,
+    No = ffi::ACONFIGURATION_NAVHIDDEN_NO as i32,
+    Yes = ffi::ACONFIGURATION_NAVHIDDEN_YES as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum ScreenSize {
+    Any = ffi::ACONFIGURATION_SCREENSIZE_ANY as i32,
+    Small = ffi::ACONFIGURATION_SCREENSIZE_SMALL as i32,
+    Normal = ffi::ACONFIGURATION_SCREENSIZE_NORMAL as i32,
+    Large = ffi::ACONFIGURATION_SCREENSIZE_LARGE as i32,
+    XLarge = ffi::ACONFIGURATION_SCREENSIZE_XLARGE as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum ScreenLong {
+    Any = ffi::ACONFIGURATION_SCREENLONG_ANY as i32,
+    No = ffi::ACONFIGURATION_SCREENLONG_NO as i32,
+    Yes = ffi::ACONFIGURATION_SCREENLONG_YES as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum ScreenRound {
+    Any = ffi::ACONFIGURATION_SCREENROUND_ANY as i32,
+    No = ffi::ACONFIGURATION_SCREENROUND_NO as i32,
+    Yes = ffi::ACONFIGURATION_SCREENROUND_YES as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum WideColorGamut {
+    Any = ffi::ACONFIGURATION_WIDE_COLOR_GAMUT_ANY as i32,
+    No = ffi::ACONFIGURATION_WIDE_COLOR_GAMUT_NO as i32,
+    Yes = ffi::ACONFIGURATION_WIDE_COLOR_GAMUT_YES as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum HDR {
+    Any = ffi::ACONFIGURATION_HDR_ANY as i32,
+    No = ffi::ACONFIGURATION_HDR_NO as i32,
+    Yes = ffi::ACONFIGURATION_HDR_YES as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum LayoutDir {
+    Any = ffi::ACONFIGURATION_LAYOUTDIR_ANY as i32,
+    Ltr = ffi::ACONFIGURATION_LAYOUTDIR_LTR as i32,
+    Rtl = ffi::ACONFIGURATION_LAYOUTDIR_RTL as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum UiModeType {
+    Any = ffi::ACONFIGURATION_UI_MODE_TYPE_ANY as i32,
+    Normal = ffi::ACONFIGURATION_UI_MODE_TYPE_NORMAL as i32,
+    Desk = ffi::ACONFIGURATION_UI_MODE_TYPE_DESK as i32,
+    Car = ffi::ACONFIGURATION_UI_MODE_TYPE_CAR as i32,
+    Television = ffi::ACONFIGURATION_UI_MODE_TYPE_TELEVISION as i32,
+    Applicance = ffi::ACONFIGURATION_UI_MODE_TYPE_APPLIANCE as i32,
+    Watch = ffi::ACONFIGURATION_UI_MODE_TYPE_WATCH as i32,
+    VrHeadset = ffi::ACONFIGURATION_UI_MODE_TYPE_VR_HEADSET as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[repr(i32)]
+#[non_exhaustive]
+pub enum UiModeNight {
+    Any = ffi::ACONFIGURATION_UI_MODE_NIGHT_ANY as i32,
+    No = ffi::ACONFIGURATION_UI_MODE_NIGHT_NO as i32,
+    Yes = ffi::ACONFIGURATION_UI_MODE_NIGHT_YES as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}

clients/android/native/vendor/ndk/src/data_space.rs

@@ -0,0 +1,648 @@
+//! Bindings for [`ADataSpace`]
+//!
+//! [`ADataSpace`]: https://developer.android.com/ndk/reference/group/a-data-space#group___a_data_space_1ga2759ad19cae46646cc5f7002758c4a1c
+#![cfg(feature = "api-level-28")]
+
+use std::fmt;
+
+use num_enum::{FromPrimitive, IntoPrimitive};
+
+/// Describes how to interpret colors.
+///
+/// <https://developer.android.com/ndk/reference/group/a-data-space#group___a_data_space_1ga2759ad19cae46646cc5f7002758c4a1c>
+#[repr(i32)]
+#[derive(Clone, Copy, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[doc(alias = "ADataSpace")]
+#[non_exhaustive]
+pub enum DataSpace {
+    /// Default-assumption data space, when not explicitly specified.
+    ///
+    /// It is safest to assume the buffer is an image with `sRGB` primaries and encoding ranges,
+    /// but the consumer and/or the producer of the data may simply be using defaults. No automatic
+    /// gamma transform should be expected, except for a possible display gamma transform when drawn
+    /// to a screen.
+    #[doc(alias = "ADATASPACE_UNKNOWN")]
+    Unknown = ffi::ADataSpace::ADATASPACE_UNKNOWN.0,
+
+    /// Adobe RGB.
+    ///
+    /// Uses [full range], [gamma `2.2` transfer] and [Adobe RGB standard].
+    ///
+    /// Note: Application is responsible for gamma encoding the data as a `2.2` gamma encoding is
+    /// not supported in HW.
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [gamma `2.2` transfer]: DataSpaceTransfer::Gamma2_2
+    /// [Adobe RGB standard]: DataSpaceStandard::AdobeRgb
+    #[doc(alias = "ADATASPACE_ADOBE_RGB")]
+    AdobeRgb = ffi::ADataSpace::ADATASPACE_ADOBE_RGB.0,
+    /// ITU-R Recommendation 2020 (`BT.2020`).
+    ///
+    /// Ultra High-definition television.
+    ///
+    /// Uses [full range], [`SMPTE 170M` transfer] and [`BT2020` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [`SMPTE 170M` transfer]: DataSpaceTransfer::Smpte170M
+    /// [`BT2020` standard]: DataSpaceStandard::Bt2020
+    #[doc(alias = "ADATASPACE_BT2020")]
+    Bt2020 = ffi::ADataSpace::ADATASPACE_BT2020.0,
+    /// Hybrid Log Gamma encoding.
+    ///
+    /// Uses [full range], [hybrid log gamma transfer] and [`BT2020` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [hybrid log gamma transfer]: DataSpaceTransfer::HLG
+    /// [`BT2020` standard]: DataSpaceStandard::Bt2020
+    #[doc(alias = "ADATASPACE_BT2020_HLG")]
+    Bt2020Hlg = ffi::ADataSpace::ADATASPACE_BT2020_HLG.0,
+    /// ITU Hybrid Log Gamma encoding.
+    ///
+    /// Uses [limited range], [hybrid log gamma transfer] and [`BT2020` standard].
+    ///
+    /// [limited range]: DataSpaceRange::Limited
+    /// [hybrid log gamma transfer]: DataSpaceTransfer::HLG
+    /// [`BT2020` standard]: DataSpaceStandard::Bt2020
+    #[doc(alias = "ADATASPACE_BT2020_ITU_HLG")]
+    Bt2020ItuHlg = ffi::ADataSpace::ADATASPACE_BT2020_ITU_HLG.0,
+    /// ITU-R Recommendation 2020 (`BT.2020`).
+    ///
+    /// Ultra High-definition television.
+    ///
+    /// Uses [limited range], [`SMPTE 2084 (PQ)` transfer] and [`BT2020` standard].
+    ///
+    /// [limited range]: DataSpaceRange::Limited
+    /// [`SMPTE 2084 (PQ)` transfer]: DataSpaceTransfer::St2084
+    /// [`BT2020` standard]: DataSpaceStandard::Bt2020
+    #[doc(alias = "ADATASPACE_BT2020_ITU_PQ")]
+    Bt2020ItuPq = ffi::ADataSpace::ADATASPACE_BT2020_ITU_PQ.0,
+    /// ITU-R Recommendation 2020 (`BT.2020`).
+    ///
+    /// Ultra High-definition television.
+    ///
+    /// Uses [full range], [`SMPTE 2084 (PQ)` transfer] and [`BT2020` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [`SMPTE 2084 (PQ)` transfer]: DataSpaceTransfer::St2084
+    /// [`BT2020` standard]: DataSpaceStandard::Bt2020
+    #[doc(alias = "ADATASPACE_BT2020_PQ")]
+    Bt2020Pq = ffi::ADataSpace::ADATASPACE_BT2020_PQ.0,
+    /// ITU-R Recommendation 601 (`BT.601`) - 525-line.
+    ///
+    /// Standard-definition television, 525 Lines (NTSC).
+    ///
+    /// Uses [limited range], [`SMPTE 170M` transfer] and [`BT.601_525` standard].
+    ///
+    /// [limited range]: DataSpaceRange::Limited
+    /// [`SMPTE 170M` transfer]: DataSpaceTransfer::Smpte170M
+    /// [`BT.601_525` standard]: DataSpaceStandard::Bt601_525
+    #[doc(alias = "ADATASPACE_BT601_525")]
+    Bt601_525 = ffi::ADataSpace::ADATASPACE_BT601_525.0,
+    /// ITU-R Recommendation 601 (`BT.601`) - 625-line.
+    ///
+    /// Standard-definition television, 625 Lines (PAL).
+    ///
+    /// Uses [limited range], [`SMPTE 170M` transfer] and [`BT.601_625` standard].
+    ///
+    /// [limited range]: DataSpaceRange::Limited
+    /// [`SMPTE 170M` transfer]: DataSpaceTransfer::Smpte170M
+    /// [`BT.601_625` standard]: DataSpaceStandard::Bt601_625
+    #[doc(alias = "ADATASPACE_BT601_625")]
+    Bt601_625 = ffi::ADataSpace::ADATASPACE_BT601_625.0,
+    /// ITU-R Recommendation 709 (`BT.709`).
+    ///
+    /// High-definition television.
+    ///
+    /// Uses [limited range], [`SMPTE 170M` transfer] and [`BT.709` standard].
+    ///
+    /// [limited range]: DataSpaceRange::Limited
+    /// [`SMPTE 170M` transfer]: DataSpaceTransfer::Smpte170M
+    /// [`BT.709` standard]: DataSpaceStandard::Bt709
+    #[doc(alias = "ADATASPACE_BT709")]
+    Bt709 = ffi::ADataSpace::ADATASPACE_BT709.0,
+    /// `SMPTE EG 432-1` and `SMPTE RP 431-2`.
+    ///
+    /// Digital Cinema `DCI-P3`.
+    ///
+    /// Uses [full range], [gamma `2.6` transfer] and [`D65` `DCI-P3` standard].
+    ///
+    /// Note: Application is responsible for gamma encoding the data as a `2.6` gamma encoding is
+    /// not supported in HW.
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [gamma `2.6` transfer]: DataSpaceTransfer::Gamma2_6
+    /// [`D65` `DCI-P3` standard]: DataSpaceStandard::DciP3
+    #[doc(alias = "ADATASPACE_DCI_P3")]
+    DciP3 = ffi::ADataSpace::ADATASPACE_DCI_P3.0,
+    /// Display P3.
+    ///
+    /// Uses [full range], [`sRGB` transfer] and [`D65` `DCI-P3` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [`sRGB` transfer]: DataSpaceTransfer::Srgb
+    /// [`D65` `DCI-P3` standard]: DataSpaceStandard::DciP3
+    #[doc(alias = "ADATASPACE_DISPLAY_P3")]
+    DisplayP3 = ffi::ADataSpace::ADATASPACE_DISPLAY_P3.0,
+    /// JPEG File Interchange Format (`JFIF`).
+    ///
+    /// Same model as `BT.601-625`, but all values (`Y`, `Cb`, `Cr`) range from `0` to `255`.
+    ///
+    /// Uses [full range], [`SMPTE 170M` transfer] and [`BT.601_625` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [`SMPTE 170M` transfer]: DataSpaceTransfer::Smpte170M
+    /// [`BT.601_625` standard]: DataSpaceStandard::Bt601_625
+    #[doc(alias = "ADATASPACE_JFIF")]
+    Jfif = ffi::ADataSpace::ADATASPACE_JFIF.0,
+    /// `scRGB`.
+    ///
+    /// The `red`, `green`, and `blue` components are stored in [extended][extended range] `sRGB`
+    /// space, and gamma- encoded using the [`sRGB` transfer] function.
+    ///
+    /// The values are floating point. A pixel value of `1.0`, `1.0`, `1.0` corresponds to `sRGB`
+    /// white (`D65`) at `80` nits. Values beyond the range `[0.0 - 1.0]` would correspond to other
+    /// colors spaces and/or HDR content.
+    ///
+    /// Uses [extended range], [`sRGB` transfer] and [`BT.709` standard].
+    ///
+    /// [extended range]: DataSpaceRange::Extended
+    /// [`sRGB` transfer]: DataSpaceTransfer::Srgb
+    /// [`BT.709` standard]: DataSpaceStandard::Bt709
+    #[doc(alias = "ADATASPACE_SCRGB")]
+    Scrgb = ffi::ADataSpace::ADATASPACE_SCRGB.0,
+    /// `scRGB` linear encoding
+    ///
+    /// The `red`, `green`, and `blue` components are stored in [extended][extended range] `sRGB`
+    /// space, but are linear, not gamma-encoded.
+    ///
+    /// The values are floating point. A pixel value of `1.0`, `1.0`, `1.0` corresponds to `sRGB`
+    /// white (`D65`) at `80` nits. Values beyond the range `[0.0 - 1.0]` would correspond to other
+    /// colors spaces and/or HDR content.
+    ///
+    /// Uses [extended range], [linear transfer] and [`BT.709` standard].
+    ///
+    /// [extended range]: DataSpaceRange::Extended
+    /// [linear transfer]: DataSpaceTransfer::Linear
+    /// [`BT.709` standard]: DataSpaceStandard::Bt709
+    #[doc(alias = "ADATASPACE_SCRGB_LINEAR")]
+    ScrgbLinear = ffi::ADataSpace::ADATASPACE_SCRGB_LINEAR.0,
+    /// `sRGB` gamma encoding.
+    ///
+    /// The `red`, `green` and `blue` components are stored in `sRGB` space, and converted to linear
+    /// space when read, using the [`sRGB` transfer] function for each of the `R`, `G` and `B`
+    /// components. When written, the inverse transformation is performed.
+    ///
+    /// The `alpha` component, if present, is always stored in linear space and is left unmodified
+    /// when read or written.
+    ///
+    /// Uses [full range], [`sRGB` transfer] and [`BT.709` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [`sRGB` transfer]: DataSpaceTransfer::Srgb
+    /// [`BT.709` standard]: DataSpaceStandard::Bt709
+    #[doc(alias = "ADATASPACE_SRGB")]
+    Srgb = ffi::ADataSpace::ADATASPACE_SRGB.0,
+    /// `sRGB` linear encoding.
+    ///
+    /// The `red`, `green`, and `blue` components are stored in `sRGB` space, but are linear, not
+    /// gamma-encoded. The `RGB` primaries and the white point are the same as [`BT.709]`.
+    ///
+    /// The values are encoded using the [full range] (`[0, 255]` for 8-bit) for all components.
+    ///
+    /// Uses [full range], [linear transfer] and [`BT.709` standard].
+    ///
+    /// [full range]: DataSpaceRange::Full
+    /// [linear transfer]: DataSpaceTransfer::Linear
+    /// [`BT.709` standard]: DataSpaceStandard::Bt709
+    #[doc(alias = "ADATASPACE_SRGB_LINEAR")]
+    SrgbLinear = ffi::ADataSpace::ADATASPACE_SRGB_LINEAR.0,
+
+    /// Depth.
+    ///
+    /// This value is valid with formats [`HAL_PIXEL_FORMAT_Y16`] and [`HAL_PIXEL_FORMAT_BLOB`].
+    ///
+    /// [`HAL_PIXEL_FORMAT_Y16`]: https://cs.android.com/android/platform/superproject/main/+/main:frameworks/native/libs/nativewindow/include/vndk/hardware_buffer.h;l=74-75;drc=45317f5c7c966fc816843217adc96a2ddea8bf29
+    /// [`HAL_PIXEL_FORMAT_BLOB`]: super::hardware_buffer_format::HardwareBufferFormat::BLOB
+    #[doc(alias = "ADATASPACE_DEPTH")]
+    Depth = ffi::ADataSpace::ADATASPACE_DEPTH.0,
+    /// ISO `16684-1:2011(E)` Dynamic Depth.
+    ///
+    /// Embedded depth metadata following the dynamic depth specification.
+    #[doc(alias = "ADATASPACE_DYNAMIC_DEPTH")]
+    DynamicDepth = ffi::ADataSpace::ADATASPACE_DYNAMIC_DEPTH.0,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+impl fmt::Display for DataSpace {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(match self {
+            Self::Unknown => "Unknown",
+            Self::AdobeRgb => "AdobeRgb",
+            Self::Bt2020 => "Bt2020",
+            Self::Bt2020Hlg => "Bt2020Hlg",
+            Self::Bt2020ItuHlg => "Bt2020ItuHlg",
+            Self::Bt2020ItuPq => "Bt2020ItuPq",
+            Self::Bt2020Pq => "Bt2020Pq",
+            Self::Bt601_525 => "Bt601_525",
+            Self::Bt601_625 => "Bt601_625",
+            Self::Bt709 => "Bt709",
+            Self::DciP3 => "DciP3",
+            Self::DisplayP3 => "DisplayP3",
+            Self::Jfif => "Jfif",
+            Self::Scrgb => "Scrgb",
+            Self::ScrgbLinear => "ScrgbLinear",
+            Self::Srgb => "Srgb",
+            Self::SrgbLinear => "SrgbLinear",
+            Self::Depth => "Depth",
+            Self::DynamicDepth => "DynamicDepth",
+            Self::__Unknown(u) => {
+                return write!(
+                    f,
+                    "Unknown DataSpace({u:x?}, standard: {:?}, transfer: {:?}, range: {:?})",
+                    self.standard(),
+                    self.transfer(),
+                    self.range()
+                )
+            }
+        })
+    }
+}
+
+impl fmt::Debug for DataSpace {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(
+            f,
+            "DataSpace({self}, standard: {:?}, transfer: {:?}, range: {:?})",
+            self.standard(),
+            self.transfer(),
+            self.range(),
+        )
+    }
+}
+
+impl DataSpace {
+    /// Construct a [`DataSpace`] from individual `standard`, `transfer` and `range` components.
+    ///
+    /// Together these should correspond to a single format.
+    pub fn from_parts(
+        standard: DataSpaceStandard,
+        transfer: DataSpaceTransfer,
+        range: DataSpaceRange,
+    ) -> Self {
+        Self::from(i32::from(standard) | i32::from(transfer) | i32::from(range))
+    }
+
+    /// Extracts and returns the color-description aspect from this [`DataSpace`].
+    #[doc(alias = "STANDARD_MASK")]
+    pub fn standard(self) -> DataSpaceStandard {
+        let standard = i32::from(self) & ffi::ADataSpace::STANDARD_MASK.0;
+        standard.into()
+    }
+
+    /// Extracts and returns the transfer aspect from this [`DataSpace`].
+    #[doc(alias = "TRANSFER_MASK")]
+    pub fn transfer(self) -> DataSpaceTransfer {
+        let transfer = i32::from(self) & ffi::ADataSpace::TRANSFER_MASK.0;
+        transfer.into()
+    }
+
+    /// Extracts and returns the range aspect from this [`DataSpace`].
+    #[doc(alias = "RANGE_MASK")]
+    pub fn range(self) -> DataSpaceRange {
+        let range = i32::from(self) & ffi::ADataSpace::RANGE_MASK.0;
+        range.into()
+    }
+}
+
+/// Color-description aspects.
+///
+/// The following aspects define various characteristics of the color specification. These represent
+/// bitfields, so that a data space value can specify each of them independently. Standard aspect
+/// defines the chromaticity coordinates of the source primaries in terms of the CIE 1931 definition
+/// of `x` and `y` specified in ISO 11664-1.
+#[repr(i32)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[doc(alias = "STANDARD_MASK")]
+#[non_exhaustive]
+pub enum DataSpaceStandard {
+    /// Chromacity coordinates are unknown or are determined by the application. Implementations
+    /// shall use the following suggested standards:
+    ///
+    /// All `YCbCr` formats: [`BT.709`] if size is `720p` or larger (since most video content is
+    ///                      letterboxed this corresponds to width is `1280` or greater, or height
+    ///                      is 720 or greater). [`BT.601_625`] if size is smaller than `720p` or
+    ///                      is `JPEG`.
+    /// All `RGB` formats:   [`BT.709`].
+    ///
+    /// For all other formats the standard is undefined, and implementations should use an
+    /// appropriate standard for the data represented.
+    ///
+    /// [`BT.709`]: Self::Bt709
+    /// [`BT.601_625`]: Self::Bt601_625
+    #[doc(alias = "STANDARD_UNSPECIFIED")]
+    Unspecified = ffi::ADataSpace::STANDARD_UNSPECIFIED.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.300  | 0.600  |
+    /// | blue        | 0.150  | 0.060  |
+    /// | red         | 0.640  | 0.330  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// Use the unadjusted `KR = 0.2126`, `KB = 0.0722` luminance interpretation for `RGB`
+    /// conversion.
+    #[doc(alias = "STANDARD_BT709")]
+    Bt709 = ffi::ADataSpace::STANDARD_BT709.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.290  | 0.600  |
+    /// | blue        | 0.150  | 0.060  |
+    /// | red         | 0.640  | 0.330  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// `KR = 0.299`, `KB = 0.114`. This adjusts the luminance interpretation for `RGB` conversion
+    /// from the one purely determined by the primaries to minimize the color shift into `RGB`
+    /// space that uses [`BT.709`] primaries.
+    ///
+    /// [`BT.709`]: Self::Bt709
+    #[doc(alias = "STANDARD_BT601_625")]
+    Bt601_625 = ffi::ADataSpace::STANDARD_BT601_625.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.290  | 0.600  |
+    /// | blue        | 0.150  | 0.060  |
+    /// | red         | 0.640  | 0.330  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// Use the unadjusted `KR = 0.222`, `KB = 0.071` luminance interpretation for `RGB` conversion.
+    #[doc(alias = "STANDARD_BT601_625_UNADJUSTED")]
+    Bt601_625Unadjusted = ffi::ADataSpace::STANDARD_BT601_625_UNADJUSTED.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.310  | 0.595  |
+    /// | blue        | 0.155  | 0.070  |
+    /// | red         | 0.630  | 0.340  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// `KR = 0.299`, `KB = 0.114`. This adjusts the luminance interpretation for `RGB` conversion
+    /// from the one purely determined by the primaries to minimize the color shift into `RGB` space
+    /// that uses [`BT.709`] primaries.
+    ///
+    /// [`BT.709`]: Self::Bt709
+    #[doc(alias = "STANDARD_BT601_525")]
+    Bt601_525 = ffi::ADataSpace::STANDARD_BT601_525.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.310  | 0.595  |
+    /// | blue        | 0.155  | 0.070  |
+    /// | red         | 0.630  | 0.340  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// Use the unadjusted `KR = 0.212`, `KB = 0.087` luminance interpretation
+    /// for `RGB` conversion (as in `SMPTE 240M`).
+    #[doc(alias = "STANDARD_BT601_525_UNADJUSTED")]
+    Bt601_525Unadjusted = ffi::ADataSpace::STANDARD_BT601_525_UNADJUSTED.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.170  | 0.797  |
+    /// | blue        | 0.131  | 0.046  |
+    /// | red         | 0.708  | 0.292  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// Use the unadjusted `KR = 0.2627`, `KB = 0.0593` luminance interpretation for `RGB`
+    /// conversion.
+    #[doc(alias = "STANDARD_BT2020")]
+    Bt2020 = ffi::ADataSpace::STANDARD_BT2020.0,
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.170  | 0.797  |
+    /// | blue        | 0.131  | 0.046  |
+    /// | red         | 0.708  | 0.292  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    ///
+    /// Use the unadjusted `KR = 0.2627`, `KB = 0.0593` luminance interpretation for `RGB`
+    /// conversion using the linear domain.
+    #[doc(alias = "STANDARD_BT2020_CONSTANT_LUMINANCE")]
+    Bt2020ConstantLuminance = ffi::ADataSpace::STANDARD_BT2020_CONSTANT_LUMINANCE.0,
+    /// | Primaries | x     | y    |
+    /// | --------- | ----- | ---- |
+    /// | green     | 0.21  |0.71  |
+    /// | blue      | 0.14  |0.08  |
+    /// | red       | 0.67  |0.33  |
+    /// | white (C) | 0.310 |0.316 |
+    ///
+    /// Use the unadjusted `KR = 0.30`, `KB = 0.11` luminance interpretation for `RGB` conversion.
+    #[doc(alias = "STANDARD_BT470M")]
+    Bt470M = ffi::ADataSpace::STANDARD_BT470M.0,
+    /// | Primaries | x     | y     |
+    /// | --------- | ----- | ----- |
+    /// | green     | 0.243 | 0.692 |
+    /// | blue      | 0.145 | 0.049 |
+    /// | red       | 0.681 | 0.319 |
+    /// | white (C) | 0.310 | 0.316 |
+    ///
+    /// Use the unadjusted `KR = 0.254`, `KB = 0.068` luminance interpretation for `RGB` conversion.
+    #[doc(alias = "STANDARD_FILM")]
+    Film = ffi::ADataSpace::STANDARD_FILM.0,
+    /// `SMPTE EG 432-1` and `SMPTE RP 431-2`. (`DCI-P3`)
+    ///
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.265  | 0.690  |
+    /// | blue        | 0.150  | 0.060  |
+    /// | red         | 0.680  | 0.320  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    #[doc(alias = "STANDARD_DCI_P3")]
+    DciP3 = ffi::ADataSpace::STANDARD_DCI_P3.0,
+    /// Adobe RGB
+    ///
+    /// | Primaries   | x      | y      |
+    /// | ----------- | ------ | ------ |
+    /// | green       | 0.210  | 0.710  |
+    /// | blue        | 0.150  | 0.060  |
+    /// | red         | 0.640  | 0.330  |
+    /// | white (D65) | 0.3127 | 0.3290 |
+    #[doc(alias = "STANDARD_ADOBE_RGB")]
+    AdobeRgb = ffi::ADataSpace::STANDARD_ADOBE_RGB.0,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+/// Transfer aspect.
+///
+/// Transfer characteristics are the opto-electronic transfer characteristic at the source as a
+///function of linear optical intensity (luminance).
+///
+/// For digital signals, `E` corresponds to the recorded value. Normally, the transfer function is
+/// applied in `RGB` space to each of the `R`, `G` and `B` components independently. This may result
+/// in color shift that can be minimized by applying the transfer function in `Lab` space only for
+/// the `L` component. Implementation may apply the transfer function in `RGB` space for all pixel
+/// formats if desired.
+#[repr(i32)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[doc(alias = "TRANSFER_MASK")]
+#[non_exhaustive]
+pub enum DataSpaceTransfer {
+    /// Transfer characteristics are unknown or are determined by the application.
+    ///
+    /// Implementations should use the following transfer functions:
+    ///
+    /// - For `YCbCr` formats: use [`DataSpaceTransfer::Smpte170M`]
+    /// - For `RGB` formats: use [`DataSpaceTransfer::Srgb`]
+    ///
+    /// For all other formats the transfer function is undefined, and implementations should use an
+    /// appropriate standard for the data represented.
+    #[doc(alias = "TRANSFER_UNSPECIFIED")]
+    Unspecified = ffi::ADataSpace::TRANSFER_UNSPECIFIED.0,
+
+    /// Linear transfer.
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = L
+    /// ```
+    /// - `L`: luminance of image `0 <= L <= 1` for conventional colorimetry
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_LINEAR")]
+    Linear = ffi::ADataSpace::TRANSFER_LINEAR.0,
+    /// `sRGB` transfer.
+    ///
+    /// Transfer characteristic curve:
+    ///
+    /// ```ignore
+    /// E = 1.055 * L^(1/2.4) - 0.055 for 0.0031308 <= L <= 1
+    ///   = 12.92 * L                 for 0 <= L < 0.0031308
+    /// ```
+    /// - `L`: luminance of image `0 <= L <= 1` for conventional colorimetry
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_SRGB")]
+    Srgb = ffi::ADataSpace::TRANSFER_SRGB.0,
+    /// SMPTE 170M transfer.
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = 1.099 * L ^ 0.45 - 0.099 for 0.018 <= L <= 1
+    ///   = 4.500 * L                for 0 <= L < 0.018
+    /// ```
+    /// - `L`: luminance of image `0 <= L <= 1` for conventional colorimetry
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_SMPTE_170M")]
+    Smpte170M = ffi::ADataSpace::TRANSFER_SMPTE_170M.0,
+    /// Display gamma `2.2`.
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = L ^ (1/2.2)
+    /// ```
+    /// - `L`: luminance of image `0 <= L <= 1` for conventional colorimetry
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_GAMMA2_2")]
+    Gamma2_2 = ffi::ADataSpace::TRANSFER_GAMMA2_2.0,
+    /// Display gamma `2.6`.
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = L ^ (1/2.6)
+    /// ```
+    /// - `L`: luminance of image `0 <= L <= 1` for conventional colorimetry
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_GAMMA2_6")]
+    Gamma2_6 = ffi::ADataSpace::TRANSFER_GAMMA2_6.0,
+    /// Display gamma `2.8`.
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = L ^ (1/2.8)
+    /// ```
+    /// - `L`: luminance of image `0 <= L <= 1` for conventional colorimetry
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_GAMMA2_8")]
+    Gamma2_8 = ffi::ADataSpace::TRANSFER_GAMMA2_8.0,
+    /// SMPTE ST 2084 (Dolby Perceptual Quantizer).
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = ((c1 + c2 * L^n) / (1 + c3 * L^n)) ^ m
+    /// c1 = c3 - c2 + 1 = 3424 / 4096 = 0.8359375
+    /// c2 = 32 * 2413 / 4096 = 18.8515625
+    /// c3 = 32 * 2392 / 4096 = 18.6875
+    /// m = 128 * 2523 / 4096 = 78.84375
+    /// n = 0.25 * 2610 / 4096 = 0.1593017578125
+    /// ```
+    /// - `L`: luminance of image 0 <= L <= 1 for HDR colorimetry.
+    ///        `L = 1` corresponds to `10000 cd/m2`
+    #[doc(alias = "TRANSFER_ST2084")]
+    St2084 = ffi::ADataSpace::TRANSFER_ST2084.0,
+    /// ARIB STD-B67 Hybrid Log Gamma.
+    ///
+    /// Transfer characteristic curve:
+    /// ```ignore
+    /// E = r * L^0.5                 for 0 <= L <= 1
+    ///   = a * ln(L - b) + c         for 1 < L
+    /// a = 0.17883277
+    /// b = 0.28466892
+    /// c = 0.55991073
+    /// r = 0.5
+    /// ```
+    /// - `L`: luminance of image `0 <= L` for HDR colorimetry.
+    ///        `L = 1` corresponds to reference white level of `100 cd/m2`
+    /// - `E`: corresponding electrical signal
+    #[doc(alias = "TRANSFER_HLG")]
+    HLG = ffi::ADataSpace::TRANSFER_HLG.0,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+/// Range aspect.
+///
+/// Defines the range of values corresponding to the unit range of `0-1`. This is defined for
+/// `YCbCr` only, but can be expanded to `RGB` space.
+#[repr(i32)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[doc(alias = "RANGE_MASK")]
+#[non_exhaustive]
+pub enum DataSpaceRange {
+    /// Range is unknown or are determined by the application.  Implementations shall use the
+    /// following suggested ranges:
+    ///
+    /// - All YCbCr formats: limited range.
+    /// - All RGB or RGBA formats (including RAW and Bayer): full range.
+    /// - All Y formats: full range
+    ///
+    /// For all other formats range is undefined, and implementations should use an appropriate
+    /// range for the data represented.
+    #[doc(alias = "RANGE_UNSPECIFIED")]
+    Unspecified = ffi::ADataSpace::RANGE_UNSPECIFIED.0,
+    /// Full range uses all values for `Y`, `Cb` and `Cr` from `0` to `2^b-1`, where `b` is the bit
+    /// depth of the color format.
+    #[doc(alias = "RANGE_FULL")]
+    Full = ffi::ADataSpace::RANGE_FULL.0,
+    /// Limited range uses values `16/256*2^b` to `235/256*2^b` for `Y`, and `1/16*2^b` to
+    /// `15/16*2^b` for `Cb`, `Cr`, `R`, `G` and `B`, where `b` is the bit depth of the color
+    /// format.
+    ///
+    /// E.g. For 8-bit-depth formats: Luma (`Y`) samples should range from `16` to `235`, inclusive
+    /// Chroma `(Cb, Cr)` samples should range from `16` to `240`, inclusive.
+    ///
+    /// For 10-bit-depth formats: Luma (`Y`) samples should range from `64` to `940`, inclusive
+    /// Chroma `(Cb, Cr)` samples should range from `64` to `960`, inclusive.
+    #[doc(alias = "RANGE_LIMITED")]
+    Limited = ffi::ADataSpace::RANGE_LIMITED.0,
+    /// Extended range is used for `scRGB`.
+    ///
+    /// Intended for use with floating point pixel formats. `[0.0 - 1.0]` is the standard `sRGB`
+    /// space. Values outside the range `0.0 - 1.0` can encode color outside the `sRGB` gamut. Used
+    /// to blend / merge multiple dataspaces on a single display.
+    #[doc(alias = "RANGE_EXTENDED")]
+    Extended = ffi::ADataSpace::RANGE_EXTENDED.0,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}

clients/android/native/vendor/ndk/src/font.rs

@@ -0,0 +1,552 @@
+//! Bindings for [`AFont`], [`AFontMatcher`], and [`ASystemFontIterator`]
+//!
+//! [`AFont`]: https://developer.android.com/ndk/reference/group/font
+//! [`AFontMatcher`]: https://developer.android.com/ndk/reference/group/font#afontmatcher_create
+//! [`ASystemFontIterator`]: https://developer.android.com/ndk/reference/group/font#asystemfontiterator_open
+
+#![cfg(feature = "api-level-29")]
+
+use std::convert::TryFrom;
+use std::ffi::{CStr, OsStr};
+use std::fmt::{self, Write};
+use std::os::unix::prelude::OsStrExt;
+use std::path::Path;
+use std::ptr::NonNull;
+
+use num_enum::IntoPrimitive;
+
+/// An integer holding a valid font weight value between 1 and 1000.
+///
+/// See the [`Font::weight`] definition for more details.
+#[derive(Clone, Copy, Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub struct FontWeight(u16);
+
+impl FontWeight {
+    pub const fn new(value: u16) -> Result<Self, FontWeightValueError> {
+        if Self::MIN.0 <= value && value <= Self::MAX.0 {
+            Ok(Self(value))
+        } else {
+            Err(FontWeightValueError(()))
+        }
+    }
+
+    pub const fn to_u16(self) -> u16 {
+        self.0
+    }
+
+    /// The minimum value for the font weight value. Unlike [`ffi::AFONT_WEIGHT_MIN`] being `0`,
+    /// [`FontWeight::MIN`] is `1` to make the `MIN..MAX` range be inclusive, keeping consistency
+    /// between [`FontWeight`] and other types like `std::num::NonZeroU*`.
+    pub const MIN: FontWeight = FontWeight(ffi::AFONT_WEIGHT_MIN as u16 + 1);
+
+    /// A font weight value for the thin weight.
+    pub const THIN: FontWeight = FontWeight(ffi::AFONT_WEIGHT_THIN as u16);
+
+    /// A font weight value for the extra-light weight.
+    pub const EXTRA_LIGHT: FontWeight = FontWeight(ffi::AFONT_WEIGHT_EXTRA_LIGHT as u16);
+
+    /// A font weight value for the light weight.
+    pub const LIGHT: FontWeight = FontWeight(ffi::AFONT_WEIGHT_LIGHT as u16);
+
+    /// A font weight value for the normal weight.
+    pub const NORMAL: FontWeight = FontWeight(ffi::AFONT_WEIGHT_NORMAL as u16);
+
+    /// A font weight value for the medium weight.
+    pub const MEDIUM: FontWeight = FontWeight(ffi::AFONT_WEIGHT_MEDIUM as u16);
+
+    /// A font weight value for the semi-bold weight.
+    pub const SEMI_BOLD: FontWeight = FontWeight(ffi::AFONT_WEIGHT_SEMI_BOLD as u16);
+
+    /// A font weight value for the bold weight.
+    pub const BOLD: FontWeight = FontWeight(ffi::AFONT_WEIGHT_BOLD as u16);
+
+    /// A font weight value for the extra-bold weight.
+    pub const EXTRA_BOLD: FontWeight = FontWeight(ffi::AFONT_WEIGHT_EXTRA_BOLD as u16);
+
+    /// A font weight value for the black weight.
+    pub const BLACK: FontWeight = FontWeight(ffi::AFONT_WEIGHT_BLACK as u16);
+
+    /// The maximum value for the font weight value.
+    pub const MAX: FontWeight = FontWeight(ffi::AFONT_WEIGHT_MAX as u16);
+}
+
+impl fmt::Display for FontWeight {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.write_str(match *self {
+            FontWeight::THIN => "Thin",
+            FontWeight::EXTRA_LIGHT => "Extra Light (Ultra Light)",
+            FontWeight::LIGHT => "Light",
+            FontWeight::NORMAL => "Normal (Regular)",
+            FontWeight::MEDIUM => "Medium",
+            FontWeight::SEMI_BOLD => "Semi Bold (Demi Bold)",
+            FontWeight::BOLD => "Bold",
+            FontWeight::EXTRA_BOLD => "Extra Bold (Ultra Bold)",
+            FontWeight::BLACK => "Black (Heavy)",
+            _ => return writeln!(f, "{}", self.0),
+        })
+    }
+}
+
+/// The error type returned when an invalid font weight value is passed.
+#[derive(Debug)]
+pub struct FontWeightValueError(());
+
+impl fmt::Display for FontWeightValueError {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt.write_str("font weight must be positive and less than or equal to 1000")
+    }
+}
+
+impl std::error::Error for FontWeightValueError {}
+
+impl TryFrom<u16> for FontWeight {
+    type Error = FontWeightValueError;
+
+    fn try_from(value: u16) -> Result<Self, Self::Error> {
+        FontWeight::new(value)
+    }
+}
+
+/// A 4-byte integer representing an OpenType axis tag.
+#[derive(Clone, Copy, PartialEq, Eq)]
+pub struct AxisTag(u32);
+
+impl AxisTag {
+    /// Checks whether the given 4-byte array can construct a valid axis tag and returns
+    /// [`Ok(AxisTag)`] if the array is valid.
+    ///
+    /// Each byte in a tag must be in the range 0x20 to 0x7E. A space character cannot be followed
+    /// by a non-space character. A tag must have one to four non-space characters. See the
+    /// [OpenType spec] for more details.
+    ///
+    /// [OpenType spec]: https://learn.microsoft.com/en-us/typography/opentype/spec/otff#data-types
+    pub const fn from_be_bytes_checked(value: [u8; 4]) -> Result<Self, AxisTagValueError> {
+        // Each byte in a tag must be in the range 0x20 to 0x7E.
+        macro_rules! check_byte_range {
+            ($($e:expr)+) => {
+                $(
+                    if !(value[$e] as char).is_ascii_graphic() && value[$e] != b' ' {
+                        return Err(AxisTagValueError::InvalidCharacter);
+                    }
+                )+
+            };
+        }
+        check_byte_range!(0 1 2 3);
+
+        if value[0] == b' ' {
+            return Err(
+                if value[1] == b' ' && value[2] == b' ' && value[3] == b' ' {
+                    // A tag must have one to four non-space characters.
+                    AxisTagValueError::EmptyTag
+                } else {
+                    // A space character cannot be followed by a non-space character.
+                    AxisTagValueError::InvalidSpacePadding
+                },
+            );
+        }
+
+        macro_rules! check_if_valid {
+            ($e:expr ; $($f:expr)+) => {
+                if value[$e] == b' ' {
+                    return if true $(&& value[$f] == b' ')+ {
+                        Ok(Self(u32::from_be_bytes(value)))
+                    } else {
+                        // A space character cannot be followed by a non-space character.
+                        Err(AxisTagValueError::InvalidSpacePadding)
+                    };
+                }
+            };
+        }
+
+        check_if_valid!(1; 2 3);
+        check_if_valid!(2; 3);
+
+        // Whether or not value[3] is b' ', value is a valid axis tag.
+        Ok(Self(u32::from_be_bytes(value)))
+    }
+
+    /// Checks whether the given 4-byte array can construct a valid axis tag and returns
+    /// [`Ok(AxisTag)`] if the array is valid.
+    ///
+    /// See [`AxisTag::from_be()`] for more details.
+    pub const fn from_be_checked(value: u32) -> Result<Self, AxisTagValueError> {
+        Self::from_be_bytes_checked(value.to_be_bytes())
+    }
+
+    /// Construct an axis tag from the given 4-byte array. If the resulting axis tag is invalid,
+    /// this function panics.
+    ///
+    /// See [`AxisTag::from_be()`] for more details.
+    pub const fn from_be_bytes(value: [u8; 4]) -> Self {
+        Self::unwrap_result(Self::from_be_bytes_checked(value))
+    }
+
+    /// Construct an axis tag from the given 4-byte integer. If the resulting axis tag is invalid,
+    /// this function panics.
+    ///
+    /// See [`AxisTag::from_be()`] for more details.
+    pub const fn from_be(value: u32) -> Self {
+        Self::unwrap_result(Self::from_be_checked(value))
+    }
+
+    /// const-version of [`Result::unwrap`]. Should be removed when [`Option::unwrap`] or
+    /// [`Result::unwrap`] become `const`-stable.
+    const fn unwrap_result(result: Result<Self, AxisTagValueError>) -> Self {
+        match result {
+            Ok(t) => t,
+            Err(e) => panic!("{}", e.as_str()),
+        }
+    }
+
+    pub const fn to_u32(self) -> u32 {
+        self.0
+    }
+
+    pub const fn to_be_bytes(self) -> [u8; 4] {
+        self.0.to_be_bytes()
+    }
+}
+
+impl fmt::Display for AxisTag {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let bytes = self.to_be_bytes();
+        f.write_char(bytes[0] as char)?;
+        f.write_char(bytes[1] as char)?;
+        f.write_char(bytes[2] as char)?;
+        f.write_char(bytes[3] as char)
+    }
+}
+
+impl fmt::Debug for AxisTag {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "AxisTag({} {:#x})", self, self.0)
+    }
+}
+
+/// The error type returned when an invalid axis tag value is passed.
+#[derive(Clone, Copy, Debug)]
+pub enum AxisTagValueError {
+    /// There is a byte not in the range 0x20 to 0x7E.
+    InvalidCharacter,
+    /// There is a space character followed by a non-space character.
+    InvalidSpacePadding,
+    /// The tag only consists of space characters.
+    EmptyTag,
+}
+
+impl AxisTagValueError {
+    pub const fn as_str(&self) -> &'static str {
+        match self {
+            Self::InvalidCharacter => "each byte in an axis tag must be in the range 0x20 to 0x7E",
+            Self::InvalidSpacePadding => {
+                "a space character cannot be followed by a non-space character"
+            }
+            Self::EmptyTag => "a tag must have one to four non-space characters",
+        }
+    }
+}
+
+impl fmt::Display for AxisTagValueError {
+    fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {
+        fmt.write_str(self.as_str())
+    }
+}
+
+impl std::error::Error for AxisTagValueError {}
+
+/// A native [`AFont *`]
+///
+/// [`AFont *`]: https://developer.android.com/ndk/reference/group/font
+#[derive(Debug)]
+pub struct Font {
+    ptr: NonNull<ffi::AFont>,
+}
+
+impl Font {
+    /// Assumes ownership of `ptr`.
+    ///
+    /// # Safety
+    /// `ptr` must be a valid owning pointer to an Android [`ffi::AFont`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AFont>) -> Self {
+        Self { ptr }
+    }
+
+    /// Returns s the pointer to the native [`ffi::AFont`].
+    pub fn ptr(&self) -> NonNull<ffi::AFont> {
+        self.ptr
+    }
+
+    /// Returns a count of font variation settings associated with the current font.
+    ///
+    /// The font variation settings are provided as multiple tag-value pairs.
+    ///
+    /// For example, bold italic font may have following font variation settings: `'wght' 700`,
+    /// `'slnt' -12`. In this case, [`Font::axis_count()`] returns `2` and [`Font::axis_tag_at()`] and
+    /// [`Font::axis_value_at()`] return those variation names and the corresponding values.
+    ///
+    /// ```no_run
+    /// use ndk::font::Font;
+    ///
+    /// let font: Font = todo!();
+    /// for idx in 0..font.axis_count() {
+    ///     log::debug!("{}: {}", font.axis_tag_at(idx), font.axis_value_at(idx));
+    /// }
+    /// // Output:
+    /// // wght: 700
+    /// // slnt: -12
+    /// ```
+    pub fn axis_count(&self) -> usize {
+        unsafe { ffi::AFont_getAxisCount(self.ptr.as_ptr()) }
+    }
+
+    /// Returns an OpenType axis tag associated with the current font.
+    ///
+    /// See [`Font::axis_count()`] for more details.
+    pub fn axis_tag_at(&self, idx: usize) -> AxisTag {
+        // Android returns Axis Tag in big-endian.
+        // See https://cs.android.com/android/platform/superproject/+/refs/heads/master:frameworks/base/native/android/system_fonts.cpp;l=197 for details
+        AxisTag(unsafe { ffi::AFont_getAxisTag(self.ptr.as_ptr(), idx as u32) })
+    }
+
+    /// Returns an OpenType axis value associated with the current font.
+    ///
+    /// See [`Font::axis_count()`] for more details.
+    pub fn axis_value_at(&self, idx: usize) -> f32 {
+        unsafe { ffi::AFont_getAxisValue(self.ptr.as_ptr(), idx as u32) }
+    }
+
+    /// Returns a font collection index value associated with the current font.
+    ///
+    /// In case the target font file is a font collection (e.g. `.ttc` or `.otc`), this returns a
+    /// non-negative value as a font offset in the collection. This always returns 0 if the target
+    /// font file is a regular font.
+    pub fn collection_index(&self) -> usize {
+        unsafe { ffi::AFont_getCollectionIndex(self.ptr.as_ptr()) }
+    }
+
+    /// Returns an absolute path to the current font file.
+    ///
+    /// Here is a list of font formats returned by this method:
+    ///
+    /// * OpenType
+    /// * OpenType Font Collection
+    /// * TrueType
+    /// * TrueType Collection
+    ///
+    /// The file extension could be one of `*.otf`, `*.ttf`, `*.otc` or `*.ttc`.
+    /// The font file specified by the returned path is guaranteed to be openable with `O_RDONLY`.
+    pub fn path(&self) -> &Path {
+        let path = unsafe { CStr::from_ptr(ffi::AFont_getFontFilePath(self.ptr.as_ptr())) };
+        OsStr::from_bytes(path.to_bytes()).as_ref()
+    }
+
+    /// Returns an IETF BCP47 compliant language tag associated with the current font.
+    ///
+    /// For information about IETF BCP47, read [`Locale.forLanguageTag(java.lang.String)`].
+    ///
+    /// [`Locale.forLanguageTag(java.lang.String)`]: https://developer.android.com/reference/java/util/Locale.html#forLanguageTag(java.lang.String)
+    pub fn locale(&self) -> Option<&CStr> {
+        let ptr = unsafe { ffi::AFont_getLocale(self.ptr.as_ptr()) };
+        if ptr.is_null() {
+            None
+        } else {
+            Some(unsafe { CStr::from_ptr(ptr) })
+        }
+    }
+
+    /// Returns a weight value associated with the current font.
+    ///
+    /// The weight values are positive and less than or equal to 1000. Here are pairs of the common
+    /// names and their values.
+    ///
+    /// | Value | Name                      | NDK Definition              |
+    /// | ----- | ------------------------- | --------------------------- |
+    /// | 100   | Thin                      | [`FontWeight::THIN`]        |
+    /// | 200   | Extra Light (Ultra Light) | [`FontWeight::EXTRA_LIGHT`] |
+    /// | 300   | Light                     | [`FontWeight::LIGHT`]       |
+    /// | 400   | Normal (Regular)          | [`FontWeight::NORMAL`]      |
+    /// | 500   | Medium                    | [`FontWeight::MEDIUM`]      |
+    /// | 600   | Semi Bold (Demi Bold)     | [`FontWeight::SEMI_BOLD`]   |
+    /// | 700   | Bold                      | [`FontWeight::BOLD`]        |
+    /// | 800   | Extra Bold (Ultra Bold)   | [`FontWeight::EXTRA_BOLD`]  |
+    /// | 900   | Black (Heavy)             | [`FontWeight::BLACK`]       |
+    pub fn weight(&self) -> FontWeight {
+        FontWeight(unsafe { ffi::AFont_getWeight(self.ptr.as_ptr()) })
+    }
+
+    /// Returns [`true`] if the current font is italic, otherwise returns [`false`].
+    pub fn is_italic(&self) -> bool {
+        unsafe { ffi::AFont_isItalic(self.ptr.as_ptr()) }
+    }
+}
+
+impl Drop for Font {
+    fn drop(&mut self) {
+        unsafe { ffi::AFont_close(self.ptr.as_ptr()) }
+    }
+}
+
+/// Corresponds to [`AFAMILY_VARIANT_*`].
+///
+/// [`AFAMILY_VARIANT_*`]: https://developer.android.com/ndk/reference/group/font#group___font_1gga96a58e29e8dbf2b5bdeb775cba46556ea662aafc7016e35d6758da93416fc0833
+#[repr(u32)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, IntoPrimitive)]
+#[non_exhaustive]
+pub enum FamilyVariant {
+    /// A family variant value for the compact font family variant.
+    /// The compact font family has Latin-based vertical metrics.
+    Compact = ffi::AFAMILY_VARIANT_COMPACT,
+    /// A family variant value for the system default variant.
+    Default = ffi::AFAMILY_VARIANT_DEFAULT,
+    /// A family variant value for the elegant font family variant.
+    /// The elegant font family may have larger vertical metrics than Latin font.
+    Elegant = ffi::AFAMILY_VARIANT_ELEGANT,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(u32),
+}
+
+/// A native [`AFontMatcher *`]
+///
+/// [`AFontMatcher *`]: https://developer.android.com/ndk/reference/group/font#afontmatcher_create
+#[derive(Debug)]
+pub struct FontMatcher {
+    ptr: NonNull<ffi::AFontMatcher>,
+}
+
+impl FontMatcher {
+    /// Assumes ownership of `ptr`.
+    ///
+    /// # Safety
+    /// `ptr` must be a valid owning pointer to an Android [`ffi::AFontMatcher`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AFontMatcher>) -> Self {
+        Self { ptr }
+    }
+
+    /// Returns s the pointer to the native [`ffi::AFontMatcher`].
+    pub fn ptr(&self) -> NonNull<ffi::AFontMatcher> {
+        self.ptr
+    }
+
+    /// Creates a new [`FontMatcher`] object. [`FontMatcher`] selects the best font from the
+    /// parameters set by the user.
+    pub fn new() -> Self {
+        let ptr = NonNull::new(unsafe { ffi::AFontMatcher_create() })
+            .expect("AFontMatcher_create returned NULL");
+        unsafe { FontMatcher::from_ptr(ptr) }
+    }
+
+    /// Performs the matching from the generic font family for the text and select one font.
+    ///
+    /// For more information about generic font families, please read the
+    /// [W3C spec](https://www.w3.org/TR/css-fonts-4/#generic-font-families).
+    ///
+    /// Even if no font can render the given text, this function will return a non-null result for
+    /// drawing Tofu character.
+    ///
+    /// # Parameters
+    ///
+    /// - `family_name`: A font family name.
+    /// - `text`: A UTF-16 encoded text buffer to be rendered. If an empty string is given, this
+    ///   function will panic.
+    /// - `run_length_out`: Set this to [`Some`] if you want to get the length of the text run with
+    ///   the font returned.
+    pub fn match_font(
+        &mut self,
+        family_name: &CStr,
+        text: &[u16],
+        run_length_out: Option<&mut u32>,
+    ) -> Font {
+        if text.is_empty() {
+            panic!("text is empty");
+        }
+        unsafe {
+            Font::from_ptr(
+                NonNull::new(ffi::AFontMatcher_match(
+                    self.ptr.as_ptr(),
+                    family_name.as_ptr(),
+                    text.as_ptr(),
+                    text.len() as _,
+                    run_length_out.map_or(std::ptr::null_mut(), |u| u),
+                ))
+                .expect("AFontMatcher_match returned NULL"),
+            )
+        }
+    }
+
+    /// Sets the family variant of the font to be matched.
+    ///
+    /// If this function is not called, the match is performed with [`FamilyVariant::Default`].
+    pub fn set_family_variant(&mut self, family_variant: FamilyVariant) {
+        unsafe { ffi::AFontMatcher_setFamilyVariant(self.ptr.as_ptr(), family_variant.into()) }
+    }
+
+    /// Sets the locale of the font to be matched.
+    ///
+    /// If this function is not called, the match is performed with an empty locale list.
+    ///
+    /// # Parameters
+    ///
+    /// - `language_tags`: comma separated IETF BCP47 compliant language tags.
+    pub fn set_locales(&mut self, language_tags: &CStr) {
+        unsafe { ffi::AFontMatcher_setLocales(self.ptr.as_ptr(), language_tags.as_ptr()) }
+    }
+
+    /// Sets the style of the font to be matched.
+    ///
+    /// If this function is not called, the match is performed with [`FontWeight::NORMAL`] with non-italic style.
+    pub fn set_style(&mut self, weight: FontWeight, italic: bool) {
+        unsafe { ffi::AFontMatcher_setStyle(self.ptr.as_ptr(), weight.to_u16(), italic) }
+    }
+}
+
+impl Drop for FontMatcher {
+    fn drop(&mut self) {
+        unsafe { ffi::AFontMatcher_destroy(self.ptr.as_ptr()) }
+    }
+}
+
+/// A native [`ASystemFontIterator *`]
+///
+/// [`ASystemFontIterator *`]: https://developer.android.com/ndk/reference/group/font#asystemfontiterator_open
+#[derive(Debug)]
+pub struct SystemFontIterator {
+    ptr: NonNull<ffi::ASystemFontIterator>,
+}
+
+impl SystemFontIterator {
+    /// Assumes ownership of `ptr`.
+    ///
+    /// # Safety
+    /// `ptr` must be a valid owning pointer to an Android [`ffi::ASystemFontIterator`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::ASystemFontIterator>) -> Self {
+        Self { ptr }
+    }
+
+    /// Returns the pointer to the native [`ffi::ASystemFontIterator`].
+    pub fn ptr(&self) -> NonNull<ffi::ASystemFontIterator> {
+        self.ptr
+    }
+
+    /// Creates a system font iterator.
+    pub fn new() -> Option<Self> {
+        NonNull::new(unsafe { ffi::ASystemFontIterator_open() })
+            .map(|p| unsafe { SystemFontIterator::from_ptr(p) })
+    }
+}
+
+impl Iterator for SystemFontIterator {
+    type Item = Font;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        NonNull::new(unsafe { ffi::ASystemFontIterator_next(self.ptr.as_ptr()) })
+            .map(|p| unsafe { Font::from_ptr(p) })
+    }
+}
+
+impl Drop for SystemFontIterator {
+    fn drop(&mut self) {
+        unsafe { ffi::ASystemFontIterator_close(self.ptr.as_ptr()) }
+    }
+}

clients/android/native/vendor/ndk/src/hardware_buffer.rs

@@ -0,0 +1,640 @@
+//! Bindings for [`AHardwareBuffer`]
+//!
+//! [`AHardwareBuffer`]: https://developer.android.com/ndk/reference/group/a-hardware-buffer#ahardwarebuffer
+
+#![cfg(feature = "api-level-26")]
+
+use std::{
+    io::Result,
+    mem::MaybeUninit,
+    ops::Deref,
+    os::{
+        fd::{AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd},
+        raw::c_void,
+    },
+    ptr::NonNull,
+};
+
+use jni_sys::{jobject, JNIEnv};
+
+use super::{hardware_buffer_format::HardwareBufferFormat, utils::status_to_io_result};
+
+bitflags::bitflags! {
+    /// Buffer usage flags, specifying how the buffer will be accessed.
+    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+    #[doc(alias = "AHardwareBuffer_UsageFlags")]
+    pub struct HardwareBufferUsage : u64 {
+        /// The buffer will never be locked for direct CPU reads using the
+        /// [`HardwareBuffer::lock()`] function. Note that reading the buffer using OpenGL or Vulkan
+        /// functions or memory mappings is still allowed.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_READ_NEVER")]
+        const CPU_READ_NEVER = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_READ_NEVER.0;
+        /// The buffer will sometimes be locked for direct CPU reads using the
+        /// [`HardwareBuffer::lock()`] function. Note that reading the buffer using OpenGL or Vulkan
+        /// functions or memory mappings does not require the presence of this flag.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_READ_RARELY")]
+        const CPU_READ_RARELY = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_READ_RARELY.0;
+        /// The buffer will often be locked for direct CPU reads using the
+        /// [`HardwareBuffer::lock()`] function. Note that reading the buffer using OpenGL or Vulkan
+        /// functions or memory mappings does not require the presence of this flag.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN")]
+        const CPU_READ_OFTEN = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_READ_OFTEN.0;
+        /// CPU read value mask.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_READ_MASK")]
+        const CPU_READ_MASK = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_READ_MASK.0;
+
+        /// The buffer will never be locked for direct CPU writes using the
+        /// [`HardwareBuffer::lock()`] function. Note that writing the buffer using OpenGL or Vulkan
+        /// functions or memory mappings is still allowed.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_WRITE_NEVER")]
+        const CPU_WRITE_NEVER = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_WRITE_NEVER.0;
+        /// The buffer will sometimes be locked for direct CPU writes using the
+        /// [`HardwareBuffer::lock()`] function. Note that writing the buffer using OpenGL or Vulkan
+        /// functions or memory mappings does not require the presence of this flag.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_WRITE_RARELY")]
+        const CPU_WRITE_RARELY = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_WRITE_RARELY.0;
+        /// The buffer will often be locked for direct CPU writes using the
+        /// [`HardwareBuffer::lock()`] function. Note that writing the buffer using OpenGL or Vulkan
+        /// functions or memory mappings does not require the presence of this flag.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN")]
+        const CPU_WRITE_OFTEN = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_WRITE_OFTEN.0;
+        /// CPU write value mask.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK")]
+        const CPU_WRITE_MASK = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK.0;
+
+        /// The buffer will be read from by the GPU as a texture.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE")]
+        const GPU_SAMPLED_IMAGE = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_GPU_SAMPLED_IMAGE.0;
+        /// The buffer will be written to by the GPU as a framebuffer attachment.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER")]
+        const GPU_FRAMEBUFFER = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_GPU_FRAMEBUFFER.0;
+        /// The buffer will be written to by the GPU as a framebuffer attachment.
+        ///
+        /// Note that the name of this flag is somewhat misleading: it does not imply that the
+        /// buffer contains a color format. A buffer with depth or stencil format that will be
+        /// used as a framebuffer attachment should also have this flag. Use the equivalent flag
+        /// [`HardwareBufferusage::GPU_FRAMEBUFFER`] to avoid this confusion.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT")]
+        const GPU_COLOR_OUTPUT = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_GPU_COLOR_OUTPUT.0;
+        /// The buffer will be used as a composer HAL overlay layer.
+        ///
+        /// This flag is currently only needed when using [`SurfaceTransaction::set_buffer()`] to
+        /// set a buffer. In all other cases, the framework adds this flag internally to buffers
+        /// that could be presented in a composer overlay. [`SurfaceTransaction::set_buffer()`]
+        /// is special because it uses buffers allocated directly through
+        /// [`HardwareBuffer::allocate()`] instead of buffers allocated by the framework.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_COMPOSER_OVERLAY")]
+        const COMPOSER_OVERLAY = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_COMPOSER_OVERLAY.0;
+        /// The buffer is protected from direct CPU access or being read by non-secure hardware,
+        /// such as video encoders.
+        ///
+        /// This flag is incompatible with CPU read and write flags. It is mainly used when handling
+        /// DRM video. Refer to the EGL extension [`EGL_EXT_protected_content`] and GL extension
+        /// [`GL_EXT_protected_textures`] for more information on how these buffers are expected
+        /// to behave.
+        ///
+        /// [`EGL_EXT_protected_content`]: https://registry.khronos.org/EGL/extensions/EXT/EGL_EXT_protected_content.txt
+        /// [`GL_EXT_protected_textures`]: https://registry.khronos.org/OpenGL/extensions/EXT/EXT_protected_textures.txt
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT")]
+        const PROTECTED_CONTENT = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_PROTECTED_CONTENT.0;
+        /// The buffer will be read by a hardware video encoder.
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VIDEO_ENCODE")]
+        const VIDEO_ENCODE = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VIDEO_ENCODE.0;
+        /// The buffer will be used for direct writes from sensors. When this flag is present, the
+        /// format must be [`HardwareBufferFormat::Blob`].
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_SENSOR_DIRECT_DATA")]
+        const SENSOR_DIRECT_DATA = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_SENSOR_DIRECT_DATA.0;
+        /// The buffer will be used as a shader storage or uniform buffer object. When this flag is
+        /// present, the format must be [`HardwareBufferFormat::Blob`].
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER")]
+        const GPU_DATA_BUFFER = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_GPU_DATA_BUFFER.0;
+        /// The buffer will be used as a cube map texture. When this flag is present, the buffer
+        /// must have a layer count that is a multiple of 6. Note that buffers with this flag must
+        /// be bound to OpenGL textures using the extension [`GL_EXT_EGL_image_storage`] instead
+        /// of [`GL_KHR_EGL_image`].
+        ///
+        /// [`GL_EXT_EGL_image_storage`]: https://registry.khronos.org/OpenGL/extensions/EXT/EXT_EGL_image_storage.txt
+        // TODO: This extension only exists for VG. Reported at https://issuetracker.google.com/issues/300602767#comment16
+        /// [`GL_KHR_EGL_image`]: https://registry.khronos.org/OpenVG/extensions/KHR/VG_KHR_EGL_image.txt
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_GPU_CUBE_MAP")]
+        const GPU_CUBE_MAP = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_GPU_CUBE_MAP.0;
+        /// The buffer contains a complete mipmap hierarchy. Note that buffers with this flag must
+        /// be bound to OpenGL textures using the extension [`GL_EXT_EGL_image_storage`] instead
+        /// of [`GL_KHR_EGL_image`].
+        ///
+        /// [`GL_EXT_EGL_image_storage`]: https://registry.khronos.org/OpenGL/extensions/EXT/EXT_EGL_image_storage.txt
+        // TODO: This extension only exists for VG. Reported at https://issuetracker.google.com/issues/300602767#comment16
+        /// [`GL_KHR_EGL_image`]: https://registry.khronos.org/OpenVG/extensions/KHR/VG_KHR_EGL_image.txt
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_GPU_MIPMAP_COMPLETE")]
+        const GPU_MIPMAP_COMPLETE = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_GPU_MIPMAP_COMPLETE.0;
+
+        // TODO: Only available in a newer NDK
+        // /// Usage: The buffer is used for front-buffer rendering. When front-buffering rendering
+        // /// is specified, different usages may adjust their behavior as a result. For example, when
+        // /// used as [`HardwareBufferFormat::GPU_COLOR_OUTPUT`] the buffer will behave similar to a
+        // /// single-buffered window. When used with [`HardwareBufferFormat::COMPOSER_OVERLAY`], the
+        // /// system will try to prioritize the buffer receiving an overlay plane & avoid caching it
+        // /// in intermediate composition buffers.
+        // #[doc(alias = "AHARDWAREBUFFER_USAGE_FRONT_BUFFER")]
+        // const USAGE_FRONT_BUFFER = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_FRONT_BUFFER.0;
+
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_0")]
+        const VENDOR_0 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_0.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_1")]
+        const VENDOR_1 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_1.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_2")]
+        const VENDOR_2 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_2.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_3")]
+        const VENDOR_3 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_3.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_4")]
+        const VENDOR_4 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_4.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_5")]
+        const VENDOR_5 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_5.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_6")]
+        const VENDOR_6 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_6.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_7")]
+        const VENDOR_7 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_7.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_8")]
+        const VENDOR_8 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_8.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_9")]
+        const VENDOR_9 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_9.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_10")]
+        const VENDOR_10 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_10.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_11")]
+        const VENDOR_11 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_11.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_12")]
+        const VENDOR_12 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_12.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_13")]
+        const VENDOR_13 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_13.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_14")]
+        const VENDOR_14 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_14.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_15")]
+        const VENDOR_15 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_15.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_16")]
+        const VENDOR_16 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_16.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_17")]
+        const VENDOR_17 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_17.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_18")]
+        const VENDOR_18 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_18.0;
+        #[doc(alias = "AHARDWAREBUFFER_USAGE_VENDOR_19")]
+        const VENDOR_19 = ffi::AHardwareBuffer_UsageFlags::AHARDWAREBUFFER_USAGE_VENDOR_19.0;
+    }
+}
+
+impl HardwareBufferUsage {
+    /// Helper to read [`HardwareBufferUsage::CPU_READ_MASK`] values.
+    #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_READ_MASK")]
+    pub fn cpu_read(self) -> HardwareBufferUsage {
+        self.intersection(Self::CPU_READ_MASK)
+    }
+
+    /// Helper to read [`HardwareBufferUsage::CPU_WRITE_MASK`] values.
+    #[doc(alias = "AHARDWAREBUFFER_USAGE_CPU_WRITE_MASK")]
+    pub fn cpu_write(self) -> HardwareBufferUsage {
+        self.intersection(Self::CPU_WRITE_MASK)
+    }
+}
+
+pub type Rect = ffi::ARect;
+
+fn construct<T>(with_ptr: impl FnOnce(*mut T) -> i32) -> Result<T> {
+    let mut result = MaybeUninit::uninit();
+    let status = with_ptr(result.as_mut_ptr());
+    status_to_io_result(status).map(|()| unsafe { result.assume_init() })
+}
+
+/// A native [`AHardwareBuffer *`]
+///
+/// [`HardwareBuffer`] objects represent chunks of memory that can be accessed by various hardware
+/// components in the system.
+///
+/// It can be easily converted to the Java counterpart [`android.hardware.HardwareBuffer`] and
+/// passed between processes using Binder. All operations involving [`HardwareBuffer`] and
+/// [`android.hardware.HardwareBuffer`] are zero-copy, i.e., passing [`HardwareBuffer`] to another
+/// process creates a shared view of the same region of memory.
+///
+/// [`HardwareBuffer`] can be bound to EGL/OpenGL and Vulkan primitives. For EGL, use the extension
+/// function [`eglGetNativeClientBufferANDROID`] to obtain an `EGLClientBuffer` and pass it
+/// directly to [`eglCreateImageKHR`]. Refer to the EGL extensions
+/// [`EGL_ANDROID_get_native_client_buffer`] and [`EGL_ANDROID_image_native_buffer`] for more
+/// information. In Vulkan, the contents of the [`HardwareBuffer`] can be accessed as [external
+/// memory]. See the [`VK_ANDROID_external_memory_android_hardware_buffer`] extension for details.
+///
+/// [`AHardwareBuffer *`]: https://developer.android.com/ndk/reference/group/a-hardware-buffer#ahardwarebuffer
+/// [`android.hardware.HardwareBuffer`]: https://developer.android.com/reference/android/hardware/HardwareBuffer
+/// [`eglGetNativeClientBufferANDROID`]: https://www.khronos.org/registry/EGL/extensions/ANDROID/EGL_ANDROID_get_native_client_buffer.txt
+/// [`eglCreateImageKHR`]: https://www.khronos.org/registry/EGL/extensions/KHR/EGL_KHR_image_base.txt
+/// [`EGL_ANDROID_get_native_client_buffer`]: https://www.khronos.org/registry/EGL/extensions/ANDROID/EGL_ANDROID_get_native_client_buffer.txt
+/// [`EGL_ANDROID_image_native_buffer`]: https://www.khronos.org/registry/EGL/extensions/ANDROID/EGL_ANDROID_image_native_buffer.txt
+/// [external memory]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_KHR_external_memory.html
+/// [`VK_ANDROID_external_memory_android_hardware_buffer`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_ANDROID_external_memory_android_hardware_buffer.html
+#[derive(Debug)]
+pub struct HardwareBuffer {
+    inner: NonNull<ffi::AHardwareBuffer>,
+}
+
+impl HardwareBuffer {
+    /// Create an _unowned_ [`HardwareBuffer`] from a native pointer
+    ///
+    /// To wrap a strong reference (that is `release`d on [`Drop`]), call
+    /// [`HardwareBufferRef::from_ptr()`] instead.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it is a valid pointer to an NDK
+    /// [`ffi::AHardwareBuffer`] that is kept alive externally, or retrieve a strong reference
+    /// using [`HardwareBuffer::acquire()`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AHardwareBuffer>) -> Self {
+        Self { inner: ptr }
+    }
+
+    /// Returns the underlying [`ffi::AHardwareBuffer`] pointer
+    ///
+    /// See the top-level [`HardwareBuffer`] struct documentation for (graphics) APIs that accept
+    /// this pointer.
+    pub fn as_ptr(&self) -> *mut ffi::AHardwareBuffer {
+        self.inner.as_ptr()
+    }
+
+    /// Allocates a buffer that matches the passed [`HardwareBufferDesc`].
+    ///
+    /// If allocation succeeds, the buffer can be used according to the usage flags specified in
+    /// its description. If a buffer is used in ways not compatible with its usage flags, the
+    /// results are undefined and may include program termination.
+    pub fn allocate(desc: HardwareBufferDesc) -> Result<HardwareBufferRef> {
+        unsafe {
+            let ptr = construct(|res| ffi::AHardwareBuffer_allocate(&desc.into_native(), res))?;
+
+            Ok(HardwareBufferRef::from_ptr(NonNull::new_unchecked(ptr)))
+        }
+    }
+
+    /// Create a [`HardwareBuffer`] from JNI pointers
+    ///
+    /// # Safety
+    /// By calling this function, you assert that these are valid pointers to JNI objects.
+    ///
+    /// This method does not acquire any additional reference to the AHardwareBuffer that is
+    /// returned. To keep the [`HardwareBuffer`] alive after the [Java `HardwareBuffer`] object
+    /// is closed, explicitly or by the garbage collector, be sure to retrieve a strong reference
+    /// using [`HardwareBuffer::acquire()`].
+    ///
+    /// [Java `HardwareBuffer`]: https://developer.android.com/reference/android/hardware/HardwareBuffer
+    pub unsafe fn from_jni(env: *mut JNIEnv, hardware_buffer: jobject) -> Self {
+        let ptr = ffi::AHardwareBuffer_fromHardwareBuffer(env, hardware_buffer);
+
+        Self::from_ptr(NonNull::new_unchecked(ptr))
+    }
+
+    /// # Safety
+    /// By calling this function, you assert that `env` is a valid pointer to a [`JNIEnv`].
+    pub unsafe fn to_jni(&self, env: *mut JNIEnv) -> jobject {
+        ffi::AHardwareBuffer_toHardwareBuffer(env, self.as_ptr())
+    }
+
+    /// Return a description of the [`HardwareBuffer`] in the passed [`HardwareBufferDesc`] struct.
+    pub fn describe(&self) -> HardwareBufferDesc {
+        let desc = unsafe {
+            let mut result = MaybeUninit::uninit();
+            ffi::AHardwareBuffer_describe(self.as_ptr(), result.as_mut_ptr());
+            result.assume_init()
+        };
+
+        HardwareBufferDesc {
+            width: desc.width,
+            height: desc.height,
+            layers: desc.layers,
+            format: i32::try_from(desc.format)
+                .expect("i32->u32 overflow in HardwareBuffer::describe()")
+                .into(),
+            usage: HardwareBufferUsage::from_bits_retain(desc.usage),
+            stride: desc.stride,
+        }
+    }
+
+    /// Test whether the given format and usage flag combination is allocatable.
+    ///
+    /// If this function returns [`true`], it means that a buffer with the given description can
+    /// be allocated on this implementation, unless resource exhaustion occurs. If this function
+    /// returns [`false`], it means that the allocation of the given description will never
+    /// succeed.
+    ///
+    /// The return value of this function may depend on all fields in the description, except
+    /// [`HardwareBufferDesc::stride`], which is always ignored. For example, some implementations
+    /// have implementation-defined limits on texture size and layer count.
+    #[cfg(feature = "api-level-29")]
+    pub fn is_supported(desc: HardwareBufferDesc) -> bool {
+        let res = unsafe { ffi::AHardwareBuffer_isSupported(&desc.into_native()) };
+        res == 1
+    }
+
+    /// Get the system-wide unique id for this [`HardwareBuffer`].
+    #[cfg(feature = "api-level-31")]
+    #[doc(alias = "AHardwareBuffer_getId")]
+    pub fn id(&self) -> Result<u64> {
+        construct(|res| unsafe { ffi::AHardwareBuffer_getId(self.as_ptr(), res) })
+    }
+
+    /// Lock the [`HardwareBuffer`] for direct CPU access.
+    ///
+    /// This function can lock the buffer for either reading or writing. It may block if the
+    /// hardware needs to finish rendering, if CPU caches need to be synchronized, or possibly for
+    /// other implementation-specific reasons.
+    ///
+    /// The [`HardwareBuffer`] must have one layer, otherwise the call will fail.
+    ///
+    /// If `fence` is not [`None`], it specifies a fence file descriptor on which to wait before
+    /// locking the buffer. If it's [`None`], the caller is responsible for ensuring that writes
+    /// to the buffer have completed before calling this function. Using this parameter is more
+    /// efficient than waiting on the fence and then calling this function.
+    ///
+    /// The `usage` parameter may only specify `HardwareBufferUsage::CPU_*`. If set, then the
+    /// address of the buffer in virtual memory is returned. The flags must also be compatible with
+    /// usage flags specified at buffer creation: if a read flag is passed, the buffer must have
+    /// been created with [`HardwareBufferUsage::CPU_READ_RARELY`] or
+    /// [`HardwareBufferUsage::CPU_READ_OFTEN`]. If a write flag is passed, it must have been
+    /// created with [`HardwareBufferUsage::CPU_WRITE_RARELY`] or
+    /// [`HardwareBufferUsage::CPU_WRITE_OFTEN`].
+    ///
+    /// If `rect` is not [`None`], the caller promises to modify only data in the area specified by
+    /// `rect`. If rect is [`None`], the caller may modify the contents of the entire buffer. The
+    /// content of the buffer outside of the specified rect is NOT modified by this call.
+    ///
+    /// It is legal for several different threads to lock a buffer for read access; none of the
+    /// threads are blocked.
+    ///
+    /// Locking a buffer simultaneously for write or read/write is undefined, but will neither
+    /// terminate the process nor block the caller. This function may return an error or leave the
+    /// buffer's content in an indeterminate state.
+    ///
+    /// If the buffer has [`HardwareBufferFormat::BLOB`], it is legal lock it for reading and
+    /// writing in multiple threads and/or processes simultaneously, and the contents of the buffer
+    /// behave like shared memory.
+    pub fn lock(
+        &self,
+        usage: HardwareBufferUsage,
+        fence: Option<OwnedFd>,
+        rect: Option<Rect>,
+    ) -> Result<*mut c_void> {
+        let fence = fence.map_or(-1, IntoRawFd::into_raw_fd);
+        let rect = match rect {
+            Some(rect) => &rect,
+            None => std::ptr::null(),
+        };
+        construct(|res| unsafe {
+            ffi::AHardwareBuffer_lock(self.as_ptr(), usage.bits(), fence, rect, res)
+        })
+    }
+
+    /// Lock a [`HardwareBuffer`] for direct CPU access.
+    ///
+    /// This function is the same as the above [`lock()`][Self::lock()] function, but passes back
+    /// additional information about the bytes per pixel and the bytes per stride of the locked
+    /// buffer. If the bytes per pixel or bytes per stride are unknown or variable, or if the
+    /// underlying mapper implementation does not support returning additional information, then
+    /// this call will fail with [`std::io::Error::kind()`] = [`std::io::ErrorKind::Unsupported`].
+    #[cfg(feature = "api-level-29")]
+    pub fn lock_and_get_info(
+        &self,
+        usage: HardwareBufferUsage,
+        fence: Option<OwnedFd>,
+        rect: Option<Rect>,
+    ) -> Result<LockedPlaneInfo> {
+        let fence = fence.map_or(-1, IntoRawFd::into_raw_fd);
+        let rect = match rect {
+            Some(rect) => &rect,
+            None => std::ptr::null(),
+        };
+        let mut virtual_address = MaybeUninit::uninit();
+        let mut bytes_per_pixel = MaybeUninit::uninit();
+        let mut bytes_per_stride = MaybeUninit::uninit();
+        let status = unsafe {
+            ffi::AHardwareBuffer_lockAndGetInfo(
+                self.as_ptr(),
+                usage.bits(),
+                fence,
+                rect,
+                virtual_address.as_mut_ptr(),
+                bytes_per_pixel.as_mut_ptr(),
+                bytes_per_stride.as_mut_ptr(),
+            )
+        };
+        status_to_io_result(status).map(|()| unsafe {
+            LockedPlaneInfo {
+                virtual_address: virtual_address.assume_init(),
+                bytes_per_pixel: bytes_per_pixel.assume_init() as u32,
+                bytes_per_stride: bytes_per_stride.assume_init() as u32,
+            }
+        })
+    }
+
+    /// Lock a potentially multi-planar [`HardwareBuffer`] for direct CPU access.
+    ///
+    /// This function is similar to [`lock()`][Self::lock()], but can lock multi-planar formats.
+    /// Note, that multi-planar should not be confused with multi-layer images, which this locking
+    /// function does not support.
+    ///
+    /// YUV formats are always represented by three separate planes of data, one for each color
+    /// plane. The order of planes in the array is guaranteed such that plane #0 is always `Y`,
+    /// plane #1 is always `U` (`Cb`), and plane #2 is always `V` (`Cr`). All other formats are
+    /// represented by a single plane.
+    ///
+    /// Additional information always accompanies the buffers, describing the row stride and the
+    /// pixel stride for each plane.
+    ///
+    /// In case the buffer cannot be locked, this will return zero planes.
+    ///
+    /// See the [`lock()`][Self::lock()] documentation for all other locking semantics.
+    #[cfg(feature = "api-level-29")]
+    pub fn lock_planes(
+        &self,
+        usage: HardwareBufferUsage,
+        fence: Option<OwnedFd>,
+        rect: Option<Rect>,
+    ) -> Result<HardwareBufferPlanes> {
+        let fence = fence.map_or(-1, IntoRawFd::into_raw_fd);
+        let rect = match rect {
+            Some(rect) => &rect,
+            None => std::ptr::null(),
+        };
+        let planes = construct(|res| unsafe {
+            ffi::AHardwareBuffer_lockPlanes(self.as_ptr(), usage.bits(), fence, rect, res)
+        })?;
+
+        Ok(HardwareBufferPlanes {
+            inner: planes,
+            index: 0,
+        })
+    }
+
+    /// Unlock the [`HardwareBuffer`] from direct CPU access.
+    ///
+    /// Must be called after all changes to the buffer are completed by the caller. The function
+    /// will block until all work is completed. See [`unlock_async()`][Self::unlock_async()] for
+    /// a non-blocking variant that returns a file descriptor to be signaled on unlocking instead.
+    pub fn unlock(&self) -> Result<()> {
+        let status = unsafe { ffi::AHardwareBuffer_unlock(self.as_ptr(), std::ptr::null_mut()) };
+        status_to_io_result(status)
+    }
+
+    /// Unlock the [`HardwareBuffer`] from direct CPU access.
+    ///
+    /// Returns a fence file descriptor that will become signaled when unlocking is completed, or
+    /// [`None`] if unlocking is already finished. The caller is responsible for closing the file
+    /// descriptor once it's no longer needed. See [`unlock()`][Self::unlock()] for a variant that
+    /// blocks instead.
+    pub fn unlock_async(&self) -> Result<Option<OwnedFd>> {
+        let fence = construct(|res| unsafe { ffi::AHardwareBuffer_unlock(self.as_ptr(), res) })?;
+        Ok(match fence {
+            -1 => None,
+            fence => Some(unsafe { OwnedFd::from_raw_fd(fence) }),
+        })
+    }
+
+    /// Receive a [`HardwareBuffer`] from an `AF_UNIX` socket.
+    ///
+    /// `AF_UNIX` sockets are wrapped by [`std::os::unix::net::UnixListener`] and
+    /// [`std::os::unix::net::UnixStream`] in Rust and have a corresponding
+    /// [`std::os::unix::io::AsFd::as_fd()`] implementation.
+    pub fn recv_handle_from_unix_socket(socket_fd: BorrowedFd<'_>) -> Result<Self> {
+        unsafe {
+            let ptr = construct(|res| {
+                ffi::AHardwareBuffer_recvHandleFromUnixSocket(socket_fd.as_raw_fd(), res)
+            })?;
+
+            Ok(Self::from_ptr(NonNull::new_unchecked(ptr)))
+        }
+    }
+
+    /// Send the [`HardwareBuffer`] to an `AF_UNIX` socket.
+    ///
+    /// `AF_UNIX` sockets are wrapped by [`std::os::unix::net::UnixListener`] and
+    /// [`std::os::unix::net::UnixStream`] in Rust and have a corresponding
+    /// [`std::os::unix::io::AsFd::as_fd()`] implementation.
+    pub fn send_handle_to_unix_socket(&self, socket_fd: BorrowedFd<'_>) -> Result<()> {
+        let status = unsafe {
+            ffi::AHardwareBuffer_sendHandleToUnixSocket(self.as_ptr(), socket_fd.as_raw_fd())
+        };
+        status_to_io_result(status)
+    }
+
+    /// Acquire a reference on the given [`HardwareBuffer`] object.
+    ///
+    /// This prevents the object from being deleted until the last strong reference, represented
+    /// by [`HardwareBufferRef`], is [`drop()`]ped.
+    pub fn acquire(&self) -> HardwareBufferRef {
+        unsafe {
+            ffi::AHardwareBuffer_acquire(self.as_ptr());
+            HardwareBufferRef::from_ptr(self.inner)
+        }
+    }
+}
+
+/// A [`HardwareBuffer`] with an owned reference, that is released when dropped.
+/// It behaves much like a strong [`std::rc::Rc`] reference.
+#[derive(Debug)]
+pub struct HardwareBufferRef {
+    inner: HardwareBuffer,
+}
+
+impl HardwareBufferRef {
+    /// Create an _owned_ [`HardwareBuffer`] from a native pointer
+    ///
+    /// To wrap a weak reference (that is **not** `release`d on [`Drop`]), call
+    /// [`HardwareBuffer::from_ptr()`] instead.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it is a valid pointer to an NDK
+    /// [`ffi::AHardwareBuffer`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AHardwareBuffer>) -> Self {
+        Self {
+            inner: HardwareBuffer { inner: ptr },
+        }
+    }
+}
+
+impl Deref for HardwareBufferRef {
+    type Target = HardwareBuffer;
+
+    fn deref(&self) -> &Self::Target {
+        &self.inner
+    }
+}
+
+impl Drop for HardwareBufferRef {
+    fn drop(&mut self) {
+        unsafe { ffi::AHardwareBuffer_release(self.inner.as_ptr()) }
+    }
+}
+
+impl Clone for HardwareBufferRef {
+    fn clone(&self) -> Self {
+        self.acquire()
+    }
+}
+
+/// Buffer description.
+///
+/// Used for allocating new buffers and querying parameters of existing ones.
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct HardwareBufferDesc {
+    pub width: u32,
+    pub height: u32,
+    pub layers: u32,
+    pub format: HardwareBufferFormat,
+    pub usage: HardwareBufferUsage,
+    pub stride: u32,
+}
+
+impl HardwareBufferDesc {
+    fn into_native(self) -> ffi::AHardwareBuffer_Desc {
+        ffi::AHardwareBuffer_Desc {
+            width: self.width,
+            height: self.height,
+            layers: self.layers,
+            format: i32::from(self.format)
+                .try_into()
+                .expect("i32->u32 overflow in HardwareBufferDesc::into_native()"),
+            usage: self.usage.bits(),
+            stride: self.stride,
+            rfu0: 0,
+            rfu1: 0,
+        }
+    }
+}
+
+/// A native [`AHardwareBuffer_Plane`]
+///
+/// Contains the same fields as [`ffi::AHardwareBuffer_Plane`].
+///
+/// [`AHardwareBuffer_Plane`]: https://developer.android.com/ndk/reference/group/a-hardware-buffer#ahardwarebuffer_plane
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub struct LockedPlaneInfo {
+    pub virtual_address: *mut c_void,
+    pub bytes_per_pixel: u32,
+    pub bytes_per_stride: u32,
+}
+
+/// Iterator over [`ffi::AHardwareBuffer_Planes`], containing a list of [`LockedPlaneInfo`].
+#[derive(Debug)]
+pub struct HardwareBufferPlanes {
+    inner: ffi::AHardwareBuffer_Planes,
+    index: u32,
+}
+
+impl Iterator for HardwareBufferPlanes {
+    type Item = LockedPlaneInfo;
+
+    fn next(&mut self) -> Option<LockedPlaneInfo> {
+        if self.index == self.inner.planeCount {
+            None
+        } else {
+            let plane = self.inner.planes[self.index as usize];
+            self.index += 1;
+            Some(LockedPlaneInfo {
+                virtual_address: plane.data,
+                bytes_per_pixel: plane.pixelStride,
+                bytes_per_stride: plane.rowStride,
+            })
+        }
+    }
+}

clients/android/native/vendor/ndk/src/hardware_buffer_format.rs

@@ -0,0 +1,106 @@
+//! Bindings for [`AHardwareBuffer_Format`]
+//!
+//! [`AHardwareBuffer_Format`]: https://developer.android.com/ndk/reference/group/a-hardware-buffer#ahardwarebuffer_format
+
+use num_enum::{FromPrimitive, IntoPrimitive};
+
+/// Buffer pixel formats.
+#[repr(i32)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[allow(non_camel_case_types)]
+#[non_exhaustive]
+pub enum HardwareBufferFormat {
+    /// Matches deprecated [`ffi::ANativeWindow_LegacyFormat::WINDOW_FORMAT_RGBA_8888`].0.
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM")]
+    R8G8B8A8_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM.0 as i32,
+    /// Matches deprecated [`ffi::ANativeWindow_LegacyFormat::WINDOW_FORMAT_RGBX_8888`].0.
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM")]
+    R8G8B8X8_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM")]
+    R8G8B8_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM.0 as i32,
+    /// Matches deprecated [`ffi::ANativeWindow_LegacyFormat::WINDOW_FORMAT_RGB_565`].0.
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM")]
+    R5G6B5_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT")]
+    R16G16B16A16_FLOAT =
+        ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R16G16B16A16_FLOAT.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM")]
+    R10G10B10A2_UNORM =
+        ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R10G10B10A2_UNORM.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_BLOB")]
+    BLOB = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_BLOB.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_D16_UNORM")]
+    D16_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_D16_UNORM.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_D24_UNORM")]
+    D24_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_D24_UNORM.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT")]
+    D24_UNORM_S8_UINT =
+        ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_D24_UNORM_S8_UINT.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_D32_FLOAT")]
+    D32_FLOAT = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_D32_FLOAT.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT")]
+    D32_FLOAT_S8_UINT =
+        ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_D32_FLOAT_S8_UINT.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_S8_UINT")]
+    S8_UINT = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_S8_UINT.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420")]
+    Y8Cb8Cr8_420 = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_Y8Cb8Cr8_420.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AHARDWAREBUFFER_FORMAT_YCbCr_P010")]
+    YCbCr_P010 = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_YCbCr_P010.0 as i32,
+    #[cfg(feature = "api-level-26")]
+    R8_UNORM = ffi::AHardwareBuffer_Format::AHARDWAREBUFFER_FORMAT_R8_UNORM.0 as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+impl HardwareBufferFormat {
+    /// Returns [`None`] when there is no immediate byte size available for this format, for
+    /// example on planar buffer formats.
+    pub fn bytes_per_pixel(self) -> Option<usize> {
+        Some(match self {
+            Self::R8G8B8A8_UNORM | Self::R8G8B8X8_UNORM => 4,
+            #[cfg(feature = "api-level-26")]
+            Self::R8G8B8_UNORM => 3,
+            Self::R5G6B5_UNORM => 2,
+            #[cfg(feature = "api-level-26")]
+            Self::R16G16B16A16_FLOAT => 8,
+            #[cfg(feature = "api-level-26")]
+            Self::R10G10B10A2_UNORM => 4,
+            #[cfg(feature = "api-level-26")]
+            Self::BLOB => 1,
+            #[cfg(feature = "api-level-26")]
+            Self::D16_UNORM => 2,
+            #[cfg(feature = "api-level-26")]
+            Self::D24_UNORM => 3,
+            #[cfg(feature = "api-level-26")]
+            Self::D24_UNORM_S8_UINT => 4,
+            #[cfg(feature = "api-level-26")]
+            Self::D32_FLOAT => 4,
+            #[cfg(feature = "api-level-26")]
+            Self::D32_FLOAT_S8_UINT => 5,
+            #[cfg(feature = "api-level-26")]
+            Self::S8_UINT => 1,
+            #[cfg(feature = "api-level-26")]
+            Self::Y8Cb8Cr8_420 => 3,
+            #[cfg(feature = "api-level-26")]
+            Self::YCbCr_P010 => return None,
+            #[cfg(feature = "api-level-26")]
+            Self::R8_UNORM => 1,
+            Self::__Unknown(_) => return None,
+        })
+    }
+}

clients/android/native/vendor/ndk/src/input_queue.rs

@@ -0,0 +1,143 @@
+//! Bindings for [`AInputQueue`]
+//!
+//! [`AInputQueue`]: https://developer.android.com/ndk/reference/group/input#ainputqueue
+
+use std::io::Result;
+use std::os::raw::c_int;
+use std::ptr::{self, NonNull};
+
+#[cfg(feature = "api-level-33")]
+use jni_sys::{jobject, JNIEnv};
+
+use crate::event::InputEvent;
+#[cfg(doc)]
+use crate::event::KeyEvent;
+use crate::looper::ForeignLooper;
+use crate::utils::status_to_io_result;
+
+/// A native [`AInputQueue *`]
+///
+/// An input queue is the facility through which you retrieve input events.
+///
+/// [`AInputQueue *`]: https://developer.android.com/ndk/reference/group/input#ainputqueue
+#[derive(Debug)]
+pub struct InputQueue {
+    ptr: NonNull<ffi::AInputQueue>,
+}
+
+// It gets shared between threads in `ndk-glue`
+unsafe impl Send for InputQueue {}
+unsafe impl Sync for InputQueue {}
+
+impl InputQueue {
+    /// Construct an [`InputQueue`] from the native pointer.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that the pointer is a valid pointer to an NDK [`ffi::AInputQueue`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AInputQueue>) -> Self {
+        Self { ptr }
+    }
+
+    /// Returns the [`InputQueue`] object associated with the supplied
+    /// [Java `InputQueue`][`android.view.InputQueue`] object.
+    ///
+    /// # Safety
+    ///
+    /// This function should be called with a healthy JVM pointer and with a non-null
+    /// [`android.view.InputQueue`], which must be kept alive on the Java/Kotlin side.
+    ///
+    /// The returned native object holds a weak reference to the Java object, and is only valid as
+    /// long as the Java object has not yet been disposed. You should ensure that there is a strong
+    /// reference to the Java object and that it has not been disposed before using the returned
+    /// object.
+    ///
+    /// [`android.view.InputQueue`]: https://developer.android.com/reference/android/view/InputQueue
+    #[cfg(feature = "api-level-33")]
+    #[doc(alias = "AInputQueue_fromJava")]
+    pub unsafe fn from_java(env: *mut JNIEnv, input_queue: jobject) -> Option<Self> {
+        let ptr = unsafe { ffi::AInputQueue_fromJava(env, input_queue) };
+        Some(Self::from_ptr(NonNull::new(ptr)?))
+    }
+
+    pub fn ptr(&self) -> NonNull<ffi::AInputQueue> {
+        self.ptr
+    }
+
+    /// Returns the next available [`InputEvent`] from the queue.
+    ///
+    /// Returns [`None`] if no event is available.
+    #[doc(alias = "AInputQueue_getEvent")]
+    pub fn event(&self) -> Result<Option<InputEvent>> {
+        let mut out_event = ptr::null_mut();
+        let status = unsafe { ffi::AInputQueue_getEvent(self.ptr.as_ptr(), &mut out_event) };
+        match status_to_io_result(status) {
+            Ok(()) => {
+                debug_assert!(!out_event.is_null());
+                Ok(Some(unsafe {
+                    InputEvent::from_ptr(NonNull::new_unchecked(out_event))
+                }))
+            }
+            Err(e) if e.kind() == std::io::ErrorKind::WouldBlock => Ok(None),
+            Err(e) => Err(e),
+        }
+    }
+
+    /// Returns [`true`] if there are one or more events available in the input queue.
+    #[doc(alias = "AInputQueue_hasEvents")]
+    pub fn has_events(&self) -> bool {
+        match unsafe { ffi::AInputQueue_hasEvents(self.ptr.as_ptr()) } {
+            0 => false,
+            1 => true,
+            r => unreachable!("AInputQueue_hasEvents returned non-boolean {}", r),
+        }
+    }
+
+    /// Sends the key for standard pre-dispatching that is, possibly deliver it to the current IME
+    /// to be consumed before the app.
+    ///
+    /// Returns [`Some`] if it was not pre-dispatched, meaning you can process it right now. If
+    /// [`None`] is returned, you must abandon the current event processing and allow the event to
+    /// appear again in the event queue (if it does not get consumed during pre-dispatching).
+    ///
+    /// Also returns [`None`] if `event` is not a [`KeyEvent`].
+    #[doc(alias = "AInputQueue_preDispatchEvent")]
+    pub fn pre_dispatch(&self, event: InputEvent) -> Option<InputEvent> {
+        match unsafe { ffi::AInputQueue_preDispatchEvent(self.ptr.as_ptr(), event.ptr().as_ptr()) }
+        {
+            0 => Some(event),
+            _ => None,
+        }
+    }
+
+    /// Report that dispatching has finished with the given [`InputEvent`].
+    ///
+    /// This must be called after receiving an event with [`InputQueue::event()`].
+    #[doc(alias = "AInputQueue_finishEvent")]
+    pub fn finish_event(&self, event: InputEvent, handled: bool) {
+        unsafe {
+            ffi::AInputQueue_finishEvent(self.ptr.as_ptr(), event.ptr().as_ptr(), handled as c_int)
+        }
+    }
+
+    /// Add this input queue to a [`ForeignLooper`] for processing.
+    ///
+    /// See [`ForeignLooper::add_fd()`] for information on the `ident`, `callback`, and `data` params.
+    #[doc(alias = "AInputQueue_attachLooper")]
+    pub fn attach_looper(&self, looper: &ForeignLooper, id: i32) {
+        unsafe {
+            ffi::AInputQueue_attachLooper(
+                self.ptr.as_ptr(),
+                looper.ptr().as_ptr(),
+                id,
+                None,
+                std::ptr::null_mut(),
+            )
+        }
+    }
+
+    /// Remove this input queue from the [`ForeignLooper`] it is currently attached to.
+    #[doc(alias = "AInputQueue_detachLooper")]
+    pub fn detach_looper(&self) {
+        unsafe { ffi::AInputQueue_detachLooper(self.ptr.as_ptr()) }
+    }
+}

clients/android/native/vendor/ndk/src/lib.rs

@@ -0,0 +1,33 @@
+//! # Android NDK
+//!
+//! Bindings to the [Android NDK].
+//!
+//! [Android NDK]: https://developer.android.com/ndk/reference
+#![warn(
+    missing_debug_implementations,
+    rust_2018_idioms,
+    trivial_casts,
+    unused_qualifications
+)]
+#![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
+
+pub mod asset;
+pub mod audio;
+pub mod bitmap;
+pub mod configuration;
+pub mod data_space;
+pub mod event;
+pub mod font;
+pub mod hardware_buffer;
+pub mod hardware_buffer_format;
+pub mod input_queue;
+pub mod looper;
+pub mod media;
+pub mod media_error;
+pub mod native_activity;
+pub mod native_window;
+pub mod shared_memory;
+pub mod surface_texture;
+pub mod sync;
+pub mod trace;
+mod utils;

clients/android/native/vendor/ndk/src/looper.rs

@@ -0,0 +1,459 @@
+//! Bindings for [`ALooper`]
+//!
+//! In Android, [`ALooper`]s are inherently thread-local.  Due to this, there are two different
+//! [`ALooper`] interfaces exposed in this module:
+//!
+//! * [`ThreadLooper`], which has methods for the operations performable with a looper in one's own
+//!   thread; and
+//! * [`ForeignLooper`], which has methods for the operations performable with any thread's looper.
+//!
+//! [`ALooper`]: https://developer.android.com/ndk/reference/group/looper#alooper
+
+use std::mem::ManuallyDrop;
+use std::os::{
+    fd::{AsRawFd, BorrowedFd, RawFd},
+    raw::c_void,
+};
+use std::ptr;
+use std::time::Duration;
+use thiserror::Error;
+
+use crate::utils::abort_on_panic;
+
+/// A thread-local native [`ALooper *`].  This promises that there is a looper associated with the
+/// current thread.
+///
+/// [`ALooper *`]: https://developer.android.com/ndk/reference/group/looper#alooper
+#[derive(Debug)]
+pub struct ThreadLooper {
+    _marker: std::marker::PhantomData<*mut ()>, // Not send or sync
+    foreign: ForeignLooper,
+}
+
+bitflags::bitflags! {
+    /// Flags for file descriptor events that a looper can monitor.
+    ///
+    /// These flag bits can be combined to monitor multiple events at once.
+    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct FdEvent : u32 {
+        /// The file descriptor is available for read operations.
+        #[doc(alias = "ALOOPER_EVENT_INPUT")]
+        const INPUT = ffi::ALOOPER_EVENT_INPUT;
+        /// The file descriptor is available for write operations.
+        #[doc(alias = "ALOOPER_EVENT_OUTPUT")]
+        const OUTPUT = ffi::ALOOPER_EVENT_OUTPUT;
+        /// The file descriptor has encountered an error condition.
+        ///
+        /// The looper always sends notifications about errors; it is not necessary to specify this
+        /// event flag in the requested event set.
+        #[doc(alias = "ALOOPER_EVENT_ERROR")]
+        const ERROR = ffi::ALOOPER_EVENT_ERROR;
+        /// The file descriptor was hung up.
+        ///
+        /// For example, indicates that the remote end of a pipe or socket was closed.
+        ///
+        /// The looper always sends notifications about hangups; it is not necessary to specify this
+        /// event flag in the requested event set.
+        #[doc(alias = "ALOOPER_EVENT_HANGUP")]
+        const HANGUP = ffi::ALOOPER_EVENT_HANGUP;
+        /// The file descriptor is invalid.
+        ///
+        /// For example, the file descriptor was closed prematurely.
+        ///
+        /// The looper always sends notifications about invalid file descriptors; it is not
+        /// necessary to specify this event flag in the requested event set.
+        #[doc(alias = "ALOOPER_EVENT_INVALID")]
+        const INVALID = ffi::ALOOPER_EVENT_INVALID;
+
+        // https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags
+        const _ = !0;
+    }
+}
+
+/// The poll result from a [`ThreadLooper`].
+#[derive(Debug)]
+pub enum Poll<'fd> {
+    /// This looper was woken using [`ForeignLooper::wake()`]
+    Wake,
+    /// For [`ThreadLooper::poll_once*()`][ThreadLooper::poll_once()], an event was received and processed using a callback.
+    Callback,
+    /// For [`ThreadLooper::poll_*_timeout()`][ThreadLooper::poll_once_timeout()], the requested timeout was reached before any events.
+    Timeout,
+    /// An event was received
+    Event {
+        ident: i32,
+        /// # Safety
+        /// The caller should guarantee that this file descriptor remains open after it was added
+        /// via [`ForeignLooper::add_fd()`] or [`ForeignLooper::add_fd_with_callback()`].
+        fd: BorrowedFd<'fd>,
+        events: FdEvent,
+        data: *mut c_void,
+    },
+}
+
+#[derive(Debug, Copy, Clone, Error)]
+#[error("Android Looper error")]
+pub struct LooperError;
+
+impl ThreadLooper {
+    /// Prepares a looper for the current thread and returns it
+    pub fn prepare() -> Self {
+        unsafe {
+            let ptr = ffi::ALooper_prepare(ffi::ALOOPER_PREPARE_ALLOW_NON_CALLBACKS as _);
+            let foreign = ForeignLooper::from_ptr(ptr::NonNull::new(ptr).expect("looper non null"));
+            Self {
+                _marker: std::marker::PhantomData,
+                foreign,
+            }
+        }
+    }
+
+    /// Returns the looper associated with the current thread, if any.
+    pub fn for_thread() -> Option<Self> {
+        Some(Self {
+            _marker: std::marker::PhantomData,
+            foreign: ForeignLooper::for_thread()?,
+        })
+    }
+
+    /// Polls the looper, blocking on processing an event, but with a timeout in milliseconds.
+    /// Give a timeout of `0` to make this non-blocking.
+    fn poll_once_ms(&self, ms: i32) -> Result<Poll<'_>, LooperError> {
+        let mut fd = -1;
+        let mut events = -1;
+        let mut data: *mut c_void = ptr::null_mut();
+        match unsafe { ffi::ALooper_pollOnce(ms, &mut fd, &mut events, &mut data) } {
+            ffi::ALOOPER_POLL_WAKE => Ok(Poll::Wake),
+            ffi::ALOOPER_POLL_CALLBACK => Ok(Poll::Callback),
+            ffi::ALOOPER_POLL_TIMEOUT => Ok(Poll::Timeout),
+            ffi::ALOOPER_POLL_ERROR => Err(LooperError),
+            ident if ident >= 0 => Ok(Poll::Event {
+                ident,
+                // SAFETY: Even though this FD at least shouldn't outlive self, a user could have
+                // closed it after calling add_fd or add_fd_with_callback.
+                fd: unsafe { BorrowedFd::borrow_raw(fd) },
+                events: FdEvent::from_bits(events as u32)
+                    .expect("poll event contains unknown bits"),
+                data,
+            }),
+            _ => unreachable!(),
+        }
+    }
+
+    /// Polls the looper, blocking on processing an event.
+    #[inline]
+    pub fn poll_once(&self) -> Result<Poll<'_>, LooperError> {
+        self.poll_once_ms(-1)
+    }
+
+    /// Polls the looper, blocking on processing an event, but with a timeout.  Give a timeout of
+    /// [`Duration::ZERO`] to make this non-blocking.
+    ///
+    /// It panics if the timeout is larger than expressible as an [`i32`] of milliseconds (roughly 25
+    /// days).
+    #[inline]
+    pub fn poll_once_timeout(&self, timeout: Duration) -> Result<Poll<'_>, LooperError> {
+        self.poll_once_ms(
+            timeout
+                .as_millis()
+                .try_into()
+                .expect("Supplied timeout is too large"),
+        )
+    }
+
+    /// Repeatedly polls the looper, blocking on processing an event, but with a timeout in
+    /// milliseconds.  Give a timeout of `0` to make this non-blocking.
+    ///
+    /// This function will never return [`Poll::Callback`].
+    fn poll_all_ms(&self, ms: i32) -> Result<Poll<'_>, LooperError> {
+        let mut fd = -1;
+        let mut events = -1;
+        let mut data: *mut c_void = ptr::null_mut();
+        match unsafe { ffi::ALooper_pollAll(ms, &mut fd, &mut events, &mut data) } {
+            ffi::ALOOPER_POLL_WAKE => Ok(Poll::Wake),
+            ffi::ALOOPER_POLL_TIMEOUT => Ok(Poll::Timeout),
+            ffi::ALOOPER_POLL_ERROR => Err(LooperError),
+            ident if ident >= 0 => Ok(Poll::Event {
+                ident,
+                // SAFETY: Even though this FD at least shouldn't outlive self, a user could have
+                // closed it after calling add_fd or add_fd_with_callback.
+                fd: unsafe { BorrowedFd::borrow_raw(fd) },
+                events: FdEvent::from_bits(events as u32)
+                    .expect("poll event contains unknown bits"),
+                data,
+            }),
+            _ => unreachable!(),
+        }
+    }
+
+    /// Repeatedly polls the looper, blocking on processing an event.
+    ///
+    /// This function will never return [`Poll::Callback`].
+    #[inline]
+    pub fn poll_all(&self) -> Result<Poll<'_>, LooperError> {
+        self.poll_all_ms(-1)
+    }
+
+    /// Repeatedly polls the looper, blocking on processing an event, but with a timeout.  Give a
+    /// timeout of [`Duration::ZERO`] to make this non-blocking.
+    ///
+    /// This function will never return [`Poll::Callback`].
+    ///
+    /// It panics if the timeout is larger than expressible as an [`i32`] of milliseconds (roughly 25
+    /// days).
+    #[inline]
+    pub fn poll_all_timeout(&self, timeout: Duration) -> Result<Poll<'_>, LooperError> {
+        self.poll_all_ms(
+            timeout
+                .as_millis()
+                .try_into()
+                .expect("Supplied timeout is too large"),
+        )
+    }
+
+    /// Adds a file descriptor to be polled, with a callback that is invoked when any of the
+    /// [`FdEvent`]s described in `events` is triggered.
+    ///
+    /// The callback receives the file descriptor it is associated with and a bitmask of the poll
+    /// events that were triggered (typically [`FdEvent::INPUT`]).  It should return [`true`] to
+    /// continue receiving callbacks, or [`false`] to have the callback unregistered.
+    ///
+    /// See also [the NDK
+    /// docs](https://developer.android.com/ndk/reference/group/looper.html#alooper_addfd).
+    ///
+    /// Note that this will leak a [`Box`] unless the callback returns [`false`] to unregister
+    /// itself.
+    ///
+    /// # Threading
+    /// This function will be called on the current thread when this [`ThreadLooper`] is
+    /// polled. A callback can also be registered from other threads via the equivalent
+    /// [`ForeignLooper::add_fd_with_callback()`] function, which requires a [`Send`] bound.
+    ///
+    /// # Safety
+    /// The caller should guarantee that this file descriptor stays open until it is removed via
+    /// [`remove_fd()`][ForeignLooper::remove_fd()] or by returning [`false`] from the callback,
+    /// and for however long the caller wishes to use this file descriptor inside and after the
+    /// callback.
+    #[doc(alias = "ALooper_addFd")]
+    pub fn add_fd_with_callback<F: FnMut(BorrowedFd<'_>, FdEvent) -> bool>(
+        &self,
+        fd: BorrowedFd<'_>,
+        events: FdEvent,
+        callback: F,
+    ) -> Result<(), LooperError> {
+        unsafe {
+            self.foreign
+                .add_fd_with_callback_assume_send(fd, events, callback)
+        }
+    }
+
+    /// Returns a reference to the [`ForeignLooper`] that is associated with the current thread.
+    pub fn as_foreign(&self) -> &ForeignLooper {
+        &self.foreign
+    }
+
+    pub fn into_foreign(self) -> ForeignLooper {
+        self.foreign
+    }
+}
+
+/// A native [`ALooper *`], not necessarily allocated with the current thread.
+///
+/// [`ALooper *`]: https://developer.android.com/ndk/reference/group/looper#alooper
+#[derive(Debug)]
+pub struct ForeignLooper {
+    ptr: ptr::NonNull<ffi::ALooper>,
+}
+
+unsafe impl Send for ForeignLooper {}
+unsafe impl Sync for ForeignLooper {}
+
+impl Drop for ForeignLooper {
+    fn drop(&mut self) {
+        unsafe { ffi::ALooper_release(self.ptr.as_ptr()) }
+    }
+}
+
+impl Clone for ForeignLooper {
+    fn clone(&self) -> Self {
+        unsafe {
+            ffi::ALooper_acquire(self.ptr.as_ptr());
+            Self { ptr: self.ptr }
+        }
+    }
+}
+
+impl ForeignLooper {
+    /// Returns the looper associated with the current thread, if any.
+    #[inline]
+    pub fn for_thread() -> Option<Self> {
+        ptr::NonNull::new(unsafe { ffi::ALooper_forThread() })
+            .map(|ptr| unsafe { Self::from_ptr(ptr) })
+    }
+
+    /// Construct a [`ForeignLooper`] object from the given pointer.
+    ///
+    /// # Safety
+    /// By calling this function, you guarantee that the pointer is a valid, non-null pointer to an
+    /// NDK [`ffi::ALooper`].
+    #[inline]
+    pub unsafe fn from_ptr(ptr: ptr::NonNull<ffi::ALooper>) -> Self {
+        ffi::ALooper_acquire(ptr.as_ptr());
+        Self { ptr }
+    }
+
+    /// Returns a pointer to the NDK `ALooper` object.
+    #[inline]
+    pub fn ptr(&self) -> ptr::NonNull<ffi::ALooper> {
+        self.ptr
+    }
+
+    /// Wakes the looper.  An event of [`Poll::Wake`] will be sent.
+    pub fn wake(&self) {
+        unsafe { ffi::ALooper_wake(self.ptr.as_ptr()) }
+    }
+
+    /// Adds a file descriptor to be polled, without a callback.
+    ///
+    /// See also [the NDK
+    /// docs](https://developer.android.com/ndk/reference/group/looper.html#alooper_addfd).
+    ///
+    /// # Safety
+    /// The caller should guarantee that this file descriptor stays open until it is removed via
+    /// [`remove_fd()`][Self::remove_fd()], and for however long the caller wishes to use this file
+    /// descriptor when it is returned in [`Poll::Event::fd`].
+
+    // `ALooper_addFd` won't dereference `data`; it will only pass it on to the event.
+    // Optionally dereferencing it there already enforces `unsafe` context.
+    #[allow(clippy::not_unsafe_ptr_arg_deref)]
+    pub fn add_fd(
+        &self,
+        fd: BorrowedFd<'_>,
+        ident: i32,
+        events: FdEvent,
+        data: *mut c_void,
+    ) -> Result<(), LooperError> {
+        match unsafe {
+            ffi::ALooper_addFd(
+                self.ptr.as_ptr(),
+                fd.as_raw_fd(),
+                ident,
+                events.bits() as i32,
+                None,
+                data,
+            )
+        } {
+            1 => Ok(()),
+            -1 => Err(LooperError),
+            _ => unreachable!(),
+        }
+    }
+
+    /// Adds a file descriptor to be polled, with a callback that is invoked when any of the
+    /// [`FdEvent`]s described in `events` is triggered.
+    ///
+    /// The callback receives the file descriptor it is associated with and a bitmask of the poll
+    /// events that were triggered (typically [`FdEvent::INPUT`]).  It should return [`true`] to
+    /// continue receiving callbacks, or [`false`] to have the callback unregistered.
+    ///
+    /// See also [the NDK
+    /// docs](https://developer.android.com/ndk/reference/group/looper.html#alooper_addfd).
+    ///
+    /// Note that this will leak a [`Box`] unless the callback returns [`false`] to unregister
+    /// itself.
+    ///
+    /// # Threading
+    /// This function will be called on the looper thread where and when it is polled.
+    /// For registering callbacks without [`Send`] requirement, call the equivalent
+    /// [`ThreadLooper::add_fd_with_callback()`] function on the Looper thread.
+    ///
+    /// # Safety
+    /// The caller should guarantee that this file descriptor stays open until it is removed via
+    /// [`remove_fd()`][Self::remove_fd()] or by returning [`false`] from the callback, and for
+    /// however long the caller wishes to use this file descriptor inside and after the callback.
+    #[doc(alias = "ALooper_addFd")]
+    pub fn add_fd_with_callback<F: FnMut(BorrowedFd<'_>, FdEvent) -> bool + Send>(
+        &self,
+        fd: BorrowedFd<'_>,
+        events: FdEvent,
+        callback: F,
+    ) -> Result<(), LooperError> {
+        unsafe { self.add_fd_with_callback_assume_send(fd, events, callback) }
+    }
+
+    /// Private helper to deduplicate/commonize the implementation behind
+    /// [`ForeignLooper::add_fd_with_callback()`] and [`ThreadLooper::add_fd_with_callback()`],
+    /// as both have their own way of guaranteeing thread-safety.  The former, [`ForeignLooper`],
+    /// requires the closure to be [`Send`]. The latter, [`ThreadLooper`], can only exist on the
+    /// thread where polling happens and where the closure will end up being invoked, and does not
+    /// require [`Send`].
+    ///
+    /// # Safety
+    /// The caller must guarantee that `F` is [`Send`] or that `F` will only run on the current
+    /// thread.  See the explanation above about why this function exists.
+    unsafe fn add_fd_with_callback_assume_send<F: FnMut(BorrowedFd<'_>, FdEvent) -> bool>(
+        &self,
+        fd: BorrowedFd<'_>,
+        events: FdEvent,
+        callback: F,
+    ) -> Result<(), LooperError> {
+        extern "C" fn cb_handler<F: FnMut(BorrowedFd<'_>, FdEvent) -> bool>(
+            fd: RawFd,
+            events: i32,
+            data: *mut c_void,
+        ) -> i32 {
+            abort_on_panic(|| unsafe {
+                let mut cb = ManuallyDrop::new(Box::<F>::from_raw(data as *mut _));
+                let events = FdEvent::from_bits_retain(
+                    events.try_into().expect("Unexpected sign bit in `events`"),
+                );
+                let keep_registered = cb(BorrowedFd::borrow_raw(fd), events);
+                if !keep_registered {
+                    ManuallyDrop::into_inner(cb);
+                }
+                keep_registered as i32
+            })
+        }
+        let data = Box::into_raw(Box::new(callback)) as *mut _;
+        match unsafe {
+            ffi::ALooper_addFd(
+                self.ptr.as_ptr(),
+                fd.as_raw_fd(),
+                ffi::ALOOPER_POLL_CALLBACK,
+                events.bits() as i32,
+                Some(cb_handler::<F>),
+                data,
+            )
+        } {
+            1 => Ok(()),
+            -1 => Err(LooperError),
+            _ => unreachable!(),
+        }
+    }
+
+    /// Removes a previously added file descriptor from the looper.
+    ///
+    /// Returns [`true`] if the file descriptor was removed, [`false`] if it was not previously
+    /// registered.
+    ///
+    /// # Safety
+    /// When this method returns, it is safe to close the file descriptor since the looper will no
+    /// longer have a reference to it. However, it is possible for the callback to already be
+    /// running or for it to run one last time if the file descriptor was already signalled.
+    /// Calling code is responsible for ensuring that this case is safely handled. For example, if
+    /// the callback takes care of removing itself during its own execution either by returning `0`
+    /// or by calling this method, then it can be guaranteed to not be invoked again at any later
+    /// time unless registered anew.
+    ///
+    /// Note that unregistering a file descriptor with callback will leak a [`Box`] created in
+    /// [`add_fd_with_callback()`][Self::add_fd_with_callback()]. Consider returning [`false`]
+    /// from the callback instead to drop it.
+    pub fn remove_fd(&self, fd: BorrowedFd<'_>) -> Result<bool, LooperError> {
+        match unsafe { ffi::ALooper_removeFd(self.ptr.as_ptr(), fd.as_raw_fd()) } {
+            1 => Ok(true),
+            0 => Ok(false),
+            -1 => Err(LooperError),
+            _ => unreachable!(),
+        }
+    }
+}

clients/android/native/vendor/ndk/src/media/image_reader.rs

@@ -0,0 +1,459 @@
+//! Bindings for [`AImageReader`] and [`AImage`]
+//!
+//! [`AImageReader`]: https://developer.android.com/ndk/reference/group/media#aimagereader
+//! [`AImage`]: https://developer.android.com/ndk/reference/group/media#aimage
+#![cfg(feature = "api-level-24")]
+
+use crate::media_error::{construct, construct_never_null, MediaError, Result};
+use crate::native_window::NativeWindow;
+use crate::utils::abort_on_panic;
+use num_enum::{FromPrimitive, IntoPrimitive};
+use std::{
+    ffi::c_void,
+    fmt::{self, Debug, Formatter},
+    mem::MaybeUninit,
+    ptr::NonNull,
+};
+
+#[cfg(feature = "api-level-26")]
+use std::os::fd::{FromRawFd, IntoRawFd, OwnedFd};
+
+#[cfg(feature = "api-level-26")]
+use crate::hardware_buffer::{HardwareBuffer, HardwareBufferUsage};
+
+#[repr(i32)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[allow(non_camel_case_types)]
+#[non_exhaustive]
+pub enum ImageFormat {
+    RGBA_8888 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RGBA_8888.0 as i32,
+    RGBX_8888 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RGBX_8888.0 as i32,
+    RGB_888 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RGB_888.0 as i32,
+    RGB_565 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RGB_565.0 as i32,
+    RGBA_FP16 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RGBA_FP16.0 as i32,
+    YUV_420_888 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_YUV_420_888.0 as i32,
+    JPEG = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_JPEG.0 as i32,
+    RAW16 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RAW16.0 as i32,
+    RAW_PRIVATE = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RAW_PRIVATE.0 as i32,
+    RAW10 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RAW10.0 as i32,
+    RAW12 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_RAW12.0 as i32,
+    DEPTH16 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_DEPTH16.0 as i32,
+    DEPTH_POINT_CLOUD = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_DEPTH_POINT_CLOUD.0 as i32,
+    PRIVATE = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_PRIVATE.0 as i32,
+    Y8 = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_Y8.0 as i32,
+    HEIC = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_HEIC.0 as i32,
+    DEPTH_JPEG = ffi::AIMAGE_FORMATS::AIMAGE_FORMAT_DEPTH_JPEG.0 as i32,
+
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32),
+}
+
+pub type ImageListener = Box<dyn FnMut(&ImageReader) + Send>;
+
+#[cfg(feature = "api-level-26")]
+pub type BufferRemovedListener = Box<dyn FnMut(&ImageReader, &HardwareBuffer) + Send>;
+
+/// Result returned by:
+/// - [`ImageReader::acquire_next_image()`]`
+/// - [`ImageReader::acquire_next_image_async()`]`
+/// - [`ImageReader::acquire_latest_image()`]`
+/// - [`ImageReader::acquire_latest_image_async()`]`
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub enum AcquireResult<T> {
+    /// Returned if there is no buffers currently available in the reader queue.
+    #[doc(alias = "AMEDIA_IMGREADER_NO_BUFFER_AVAILABLE")]
+    NoBufferAvailable,
+    /// Returned if the number of concurrently acquired images has reached the limit.
+    #[doc(alias = "AMEDIA_IMGREADER_MAX_IMAGES_ACQUIRED")]
+    MaxImagesAcquired,
+
+    /// Returned if an [`Image`] (optionally with fence) was successfully acquired.
+    Image(T),
+}
+
+impl<T> AcquireResult<T> {
+    fn map<U>(self, f: impl FnOnce(T) -> U) -> AcquireResult<U> {
+        match self {
+            AcquireResult::Image(img) => AcquireResult::Image(f(img)),
+            AcquireResult::NoBufferAvailable => AcquireResult::NoBufferAvailable,
+            AcquireResult::MaxImagesAcquired => AcquireResult::MaxImagesAcquired,
+        }
+    }
+}
+
+impl AcquireResult<Image> {
+    /// Inlined version of [`construct_never_null()`] with IMGREADER-specific result mapping.
+    fn construct_never_null(
+        with_ptr: impl FnOnce(*mut *mut ffi::AImage) -> ffi::media_status_t,
+    ) -> Result<Self> {
+        let mut result = MaybeUninit::uninit();
+        let status = with_ptr(result.as_mut_ptr());
+        match status {
+            ffi::media_status_t::AMEDIA_IMGREADER_NO_BUFFER_AVAILABLE => {
+                Ok(Self::NoBufferAvailable)
+            }
+            ffi::media_status_t::AMEDIA_IMGREADER_MAX_IMAGES_ACQUIRED => {
+                Ok(Self::MaxImagesAcquired)
+            }
+            status => MediaError::from_status(status).map(|()| {
+                let result = unsafe { result.assume_init() };
+                Self::Image(Image {
+                    inner: if cfg!(debug_assertions) {
+                        NonNull::new(result).expect("result should never be null")
+                    } else {
+                        unsafe { NonNull::new_unchecked(result) }
+                    },
+                })
+            }),
+        }
+    }
+}
+
+/// A native [`AImageReader *`]
+///
+/// [`AImageReader *`]: https://developer.android.com/ndk/reference/group/media#aimagereader
+pub struct ImageReader {
+    inner: NonNull<ffi::AImageReader>,
+    image_cb: Option<Box<ImageListener>>,
+    #[cfg(feature = "api-level-26")]
+    buffer_removed_cb: Option<Box<BufferRemovedListener>>,
+}
+
+impl Debug for ImageReader {
+    fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
+        f.debug_struct("ImageReader")
+            .field("inner", &self.inner)
+            .field(
+                "image_cb",
+                match &self.image_cb {
+                    Some(_) => &"Some(_)",
+                    None => &"None",
+                },
+            )
+            .finish()
+    }
+}
+
+impl ImageReader {
+    fn from_ptr(inner: NonNull<ffi::AImageReader>) -> Self {
+        Self {
+            inner,
+            image_cb: None,
+            #[cfg(feature = "api-level-26")]
+            buffer_removed_cb: None,
+        }
+    }
+
+    fn as_ptr(&self) -> *mut ffi::AImageReader {
+        self.inner.as_ptr()
+    }
+
+    pub fn new(width: i32, height: i32, format: ImageFormat, max_images: i32) -> Result<Self> {
+        let inner = construct_never_null(|res| unsafe {
+            ffi::AImageReader_new(width, height, format.into(), max_images, res)
+        })?;
+
+        Ok(Self::from_ptr(inner))
+    }
+
+    #[cfg(feature = "api-level-26")]
+    pub fn new_with_usage(
+        width: i32,
+        height: i32,
+        format: ImageFormat,
+        usage: HardwareBufferUsage,
+        max_images: i32,
+    ) -> Result<Self> {
+        let inner = construct_never_null(|res| unsafe {
+            ffi::AImageReader_newWithUsage(
+                width,
+                height,
+                format.into(),
+                usage.bits(),
+                max_images,
+                res,
+            )
+        })?;
+
+        Ok(Self::from_ptr(inner))
+    }
+
+    #[doc(alias = "AImageReader_setImageListener")]
+    pub fn set_image_listener(&mut self, listener: ImageListener) -> Result<()> {
+        let mut boxed = Box::new(listener);
+        let ptr: *mut ImageListener = &mut *boxed;
+
+        unsafe extern "C" fn on_image_available(
+            context: *mut c_void,
+            reader: *mut ffi::AImageReader,
+        ) {
+            abort_on_panic(|| {
+                let reader = ImageReader::from_ptr(NonNull::new_unchecked(reader));
+                let listener: *mut ImageListener = context.cast();
+                (*listener)(&reader);
+                std::mem::forget(reader);
+            })
+        }
+
+        let mut listener = ffi::AImageReader_ImageListener {
+            context: ptr as _,
+            onImageAvailable: Some(on_image_available),
+        };
+        let status = unsafe { ffi::AImageReader_setImageListener(self.as_ptr(), &mut listener) };
+
+        // keep listener alive until Drop or new listener is assigned
+        self.image_cb = Some(boxed);
+
+        MediaError::from_status(status)
+    }
+
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AImageReader_setBufferRemovedListener")]
+    pub fn set_buffer_removed_listener(&mut self, listener: BufferRemovedListener) -> Result<()> {
+        let mut boxed = Box::new(listener);
+        let ptr: *mut BufferRemovedListener = &mut *boxed;
+
+        unsafe extern "C" fn on_buffer_removed(
+            context: *mut c_void,
+            reader: *mut ffi::AImageReader,
+            buffer: *mut ffi::AHardwareBuffer,
+        ) {
+            abort_on_panic(|| {
+                let reader = ImageReader::from_ptr(NonNull::new_unchecked(reader));
+                let buffer = HardwareBuffer::from_ptr(NonNull::new_unchecked(buffer));
+                let listener: *mut BufferRemovedListener = context.cast();
+                (*listener)(&reader, &buffer);
+                std::mem::forget(reader);
+            })
+        }
+
+        let mut listener = ffi::AImageReader_BufferRemovedListener {
+            context: ptr as _,
+            onBufferRemoved: Some(on_buffer_removed),
+        };
+        let status =
+            unsafe { ffi::AImageReader_setBufferRemovedListener(self.as_ptr(), &mut listener) };
+
+        // keep listener alive until Drop or new listener is assigned
+        self.buffer_removed_cb = Some(boxed);
+
+        MediaError::from_status(status)
+    }
+
+    /// Get a [`NativeWindow`] that can be used to produce [`Image`]s for this [`ImageReader`].
+    ///
+    /// <https://developer.android.com/ndk/reference/group/media#aimagereader_getwindow>
+    #[doc(alias = "AImageReader_getWindow")]
+    pub fn window(&self) -> Result<NativeWindow> {
+        unsafe {
+            let ptr = construct_never_null(|res| ffi::AImageReader_getWindow(self.as_ptr(), res))?;
+            Ok(NativeWindow::clone_from_ptr(ptr))
+        }
+    }
+
+    #[doc(alias = "AImageReader_getWidth")]
+    pub fn width(&self) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImageReader_getWidth(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImageReader_getHeight")]
+    pub fn height(&self) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImageReader_getHeight(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImageReader_getFormat")]
+    pub fn format(&self) -> Result<ImageFormat> {
+        let format = construct(|res| unsafe { ffi::AImageReader_getFormat(self.as_ptr(), res) })?;
+        Ok(format.into())
+    }
+
+    #[doc(alias = "AImageReader_getMaxImages")]
+    pub fn max_images(&self) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImageReader_getMaxImages(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImageReader_acquireNextImage")]
+    pub fn acquire_next_image(&self) -> Result<AcquireResult<Image>> {
+        AcquireResult::construct_never_null(|res| unsafe {
+            ffi::AImageReader_acquireNextImage(self.as_ptr(), res)
+        })
+    }
+
+    /// Acquire the next [`Image`] from the image reader's queue asynchronously.
+    ///
+    /// # Safety
+    /// If the returned file descriptor is not [`None`], it must be awaited before attempting to
+    /// access the [`Image`] returned.
+    ///
+    /// <https://developer.android.com/ndk/reference/group/media#aimagereader_acquirenextimageasync>
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AImageReader_acquireNextImageAsync")]
+    pub unsafe fn acquire_next_image_async(
+        &self,
+    ) -> Result<AcquireResult<(Image, Option<OwnedFd>)>> {
+        let mut fence = MaybeUninit::uninit();
+        AcquireResult::construct_never_null(|res| {
+            ffi::AImageReader_acquireNextImageAsync(self.as_ptr(), res, fence.as_mut_ptr())
+        })
+        .map(|result| {
+            result.map(|image| match fence.assume_init() {
+                -1 => (image, None),
+                fence => (image, Some(unsafe { OwnedFd::from_raw_fd(fence) })),
+            })
+        })
+    }
+
+    #[doc(alias = "AImageReader_acquireLatestImage")]
+    pub fn acquire_latest_image(&self) -> Result<AcquireResult<Image>> {
+        AcquireResult::construct_never_null(|res| unsafe {
+            ffi::AImageReader_acquireLatestImage(self.as_ptr(), res)
+        })
+    }
+
+    /// Acquire the latest [`Image`] from the image reader's queue asynchronously, dropping older images.
+    ///
+    /// # Safety
+    /// If the returned file descriptor is not [`None`], it must be awaited before attempting to
+    /// access the [`Image`] returned.
+    ///
+    /// <https://developer.android.com/ndk/reference/group/media#aimagereader_acquirelatestimageasync>
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AImageReader_acquireLatestImageAsync")]
+    pub unsafe fn acquire_latest_image_async(
+        &self,
+    ) -> Result<AcquireResult<(Image, Option<OwnedFd>)>> {
+        let mut fence = MaybeUninit::uninit();
+        AcquireResult::construct_never_null(|res| {
+            ffi::AImageReader_acquireLatestImageAsync(self.as_ptr(), res, fence.as_mut_ptr())
+        })
+        .map(|result| {
+            result.map(|image| match fence.assume_init() {
+                -1 => (image, None),
+                fence => (image, Some(unsafe { OwnedFd::from_raw_fd(fence) })),
+            })
+        })
+    }
+}
+
+impl Drop for ImageReader {
+    #[doc(alias = "AImageReader_delete")]
+    fn drop(&mut self) {
+        unsafe { ffi::AImageReader_delete(self.as_ptr()) };
+    }
+}
+
+/// A native [`AImage *`]
+///
+/// [`AImage *`]: https://developer.android.com/ndk/reference/group/media#aimage
+#[derive(Debug)]
+#[doc(alias = "AImage")]
+pub struct Image {
+    inner: NonNull<ffi::AImage>,
+}
+
+#[doc(alias = "AImageCropRect")]
+pub type CropRect = ffi::AImageCropRect;
+
+impl Image {
+    fn as_ptr(&self) -> *mut ffi::AImage {
+        self.inner.as_ptr()
+    }
+
+    #[doc(alias = "AImage_getPlaneData")]
+    pub fn plane_data(&self, plane_idx: i32) -> Result<&[u8]> {
+        let mut result_ptr = MaybeUninit::uninit();
+        let mut result_len = MaybeUninit::uninit();
+        let status = unsafe {
+            ffi::AImage_getPlaneData(
+                self.as_ptr(),
+                plane_idx,
+                result_ptr.as_mut_ptr(),
+                result_len.as_mut_ptr(),
+            )
+        };
+
+        MediaError::from_status(status).map(|()| unsafe {
+            std::slice::from_raw_parts(result_ptr.assume_init(), result_len.assume_init() as _)
+        })
+    }
+
+    #[doc(alias = "AImage_getPlanePixelStride")]
+    pub fn plane_pixel_stride(&self, plane_idx: i32) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImage_getPlanePixelStride(self.as_ptr(), plane_idx, res) })
+    }
+
+    #[doc(alias = "AImage_getPlaneRowStride")]
+    pub fn plane_row_stride(&self, plane_idx: i32) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImage_getPlaneRowStride(self.as_ptr(), plane_idx, res) })
+    }
+
+    #[doc(alias = "AImage_getCropRect")]
+    pub fn crop_rect(&self) -> Result<CropRect> {
+        construct(|res| unsafe { ffi::AImage_getCropRect(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImage_getWidth")]
+    pub fn width(&self) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImage_getWidth(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImage_getHeight")]
+    pub fn height(&self) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImage_getHeight(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImage_getFormat")]
+    pub fn format(&self) -> Result<ImageFormat> {
+        let format = construct(|res| unsafe { ffi::AImage_getFormat(self.as_ptr(), res) })?;
+        Ok(format.into())
+    }
+
+    #[doc(alias = "AImage_getTimestamp")]
+    pub fn timestamp(&self) -> Result<i64> {
+        construct(|res| unsafe { ffi::AImage_getTimestamp(self.as_ptr(), res) })
+    }
+
+    #[doc(alias = "AImage_getNumberOfPlanes")]
+    pub fn number_of_planes(&self) -> Result<i32> {
+        construct(|res| unsafe { ffi::AImage_getNumberOfPlanes(self.as_ptr(), res) })
+    }
+
+    /// Get the hardware buffer handle of the input image intended for GPU and/or hardware access.
+    ///
+    /// Note that no reference on the returned [`HardwareBuffer`] handle is acquired automatically.
+    /// Once the [`Image`] or the parent [`ImageReader`] is deleted, the [`HardwareBuffer`] handle
+    /// from previous [`Image::hardware_buffer()`] becomes invalid.
+    ///
+    /// If the caller ever needs to hold on a reference to the [`HardwareBuffer`] handle after the
+    /// [`Image`] or the parent [`ImageReader`] is deleted, it must call
+    /// [`HardwareBuffer::acquire()`] to acquire an extra reference, and [`drop()`] it when
+    /// finished using it in order to properly deallocate the underlying memory managed by
+    /// [`HardwareBuffer`]. If the caller has acquired an extra reference on a [`HardwareBuffer`]
+    /// returned from this function, it must also register a listener using
+    /// [`ImageReader::set_buffer_removed_listener()`] to be notified when the buffer is no longer
+    /// used by [`ImageReader`].
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AImage_getHardwareBuffer")]
+    pub fn hardware_buffer(&self) -> Result<HardwareBuffer> {
+        unsafe {
+            let ptr =
+                construct_never_null(|res| ffi::AImage_getHardwareBuffer(self.as_ptr(), res))?;
+            Ok(HardwareBuffer::from_ptr(ptr))
+        }
+    }
+
+    #[cfg(feature = "api-level-26")]
+    #[doc(alias = "AImage_deleteAsync")]
+    pub fn delete_async(self, release_fence_fd: OwnedFd) {
+        unsafe { ffi::AImage_deleteAsync(self.as_ptr(), release_fence_fd.into_raw_fd()) };
+        std::mem::forget(self);
+    }
+}
+
+impl Drop for Image {
+    #[doc(alias = "AImage_delete")]
+    fn drop(&mut self) {
+        unsafe { ffi::AImage_delete(self.as_ptr()) };
+    }
+}

clients/android/native/vendor/ndk/src/media/media_codec.rs

@@ -0,0 +1,634 @@
+//! Bindings for [`AMediaCodec`]
+//!
+//! [`AMediaCodec`]: https://developer.android.com/ndk/reference/group/media#amediacodec
+
+#[deprecated = "MediaFormat should be referenced directly from the media_format module"]
+pub use super::media_format::MediaFormat;
+use crate::media_error::{MediaError, Result};
+use crate::native_window::NativeWindow;
+use crate::utils::abort_on_panic;
+use std::{
+    ffi::{c_char, c_void, CStr, CString},
+    fmt,
+    mem::MaybeUninit,
+    pin::Pin,
+    ptr::{self, NonNull},
+    slice,
+    time::Duration,
+};
+
+#[derive(Debug, PartialEq, Eq)]
+pub enum MediaCodecDirection {
+    Decoder,
+    Encoder,
+}
+
+/// A native [`AMediaCodec *`]
+///
+/// [`AMediaCodec *`]: https://developer.android.com/ndk/reference/group/media#amediacodec
+#[derive(Debug)]
+pub struct MediaCodec {
+    inner: NonNull<ffi::AMediaCodec>,
+    async_notify_callback: Option<Pin<Box<AsyncNotifyCallback>>>,
+}
+
+pub struct AsyncNotifyCallback {
+    /// Called when an input buffer becomes available.
+    ///
+    /// The specified index is the index of the available input buffer.
+    pub on_input_available: Option<InputAvailableCallback>,
+
+    /// Called when an output buffer becomes available.
+    ///
+    /// The specified index is the index of the available output buffer. The specified
+    /// [`BufferInfo`] contains information regarding the available output buffer.
+    pub on_output_available: Option<OutputAvailableCallback>,
+
+    /// Called when the output format has changed.
+    ///
+    /// The specified format contains the new output format.
+    pub on_format_changed: Option<FormatChangedCallback>,
+
+    /// Called when the [`MediaCodec`] encountered an error.
+    ///
+    /// The specified [`ActionCode`] indicates the possible actions that client can take, and it can
+    /// be checked by calling [`ActionCode::is_recoverable`] or [`ActionCode::is_transient`]. If
+    /// both [`ActionCode::is_recoverable`] and [`ActionCode::is_transient`] return [`false`], then
+    /// the codec error is fatal and the codec must be deleted. The specified detail string may
+    /// contain more detailed messages about this error.
+    pub on_error: Option<ErrorCallback>,
+}
+
+impl fmt::Debug for AsyncNotifyCallback {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        f.debug_struct("AsyncNotifyCallback")
+            .field(
+                "on_input_available",
+                match &self.on_input_available {
+                    Some(_) => &"Some(_)",
+                    None => &"None",
+                },
+            )
+            .field(
+                "on_output_available",
+                match &self.on_output_available {
+                    Some(_) => &"Some(_)",
+                    None => &"None",
+                },
+            )
+            .field(
+                "on_format_changed",
+                match &self.on_format_changed {
+                    Some(_) => &"Some(_)",
+                    None => &"None",
+                },
+            )
+            .field(
+                "on_error",
+                match &self.on_error {
+                    Some(_) => &"Some(_)",
+                    None => &"None",
+                },
+            )
+            .finish()
+    }
+}
+
+pub type InputAvailableCallback = Box<dyn FnMut(usize) + Send>;
+pub type OutputAvailableCallback = Box<dyn FnMut(usize, &BufferInfo) + Send>;
+pub type FormatChangedCallback = Box<dyn FnMut(&MediaFormat) + Send>;
+pub type ErrorCallback = Box<dyn FnMut(MediaError, ActionCode, &CStr) + Send>;
+
+impl MediaCodec {
+    /// [punktfunk vendored patch — the ONLY change to this crate] Public so callers can bind
+    /// `AMediaCodec_*` entry points the wrapper doesn't expose yet (here:
+    /// `AMediaCodec_setOnFrameRenderedCallback` for the HUD's display stage). The pointer is valid
+    /// for `&self`'s lifetime; callers must not delete or re-configure the codec through it.
+    pub fn as_ptr(&self) -> *mut ffi::AMediaCodec {
+        self.inner.as_ptr()
+    }
+
+    pub fn from_codec_name(name: &str) -> Option<Self> {
+        let c_string = CString::new(name).unwrap();
+        Some(Self {
+            inner: NonNull::new(unsafe { ffi::AMediaCodec_createCodecByName(c_string.as_ptr()) })?,
+            async_notify_callback: None,
+        })
+    }
+
+    pub fn from_decoder_type(mime_type: &str) -> Option<Self> {
+        let c_string = CString::new(mime_type).unwrap();
+        Some(Self {
+            inner: NonNull::new(unsafe {
+                ffi::AMediaCodec_createDecoderByType(c_string.as_ptr())
+            })?,
+            async_notify_callback: None,
+        })
+    }
+
+    pub fn from_encoder_type(mime_type: &str) -> Option<Self> {
+        let c_string = CString::new(mime_type).unwrap();
+        Some(Self {
+            inner: NonNull::new(unsafe {
+                ffi::AMediaCodec_createEncoderByType(c_string.as_ptr())
+            })?,
+            async_notify_callback: None,
+        })
+    }
+
+    /// Set an asynchronous callback for actionable [`MediaCodec`] events.
+    ///
+    /// When asynchronous callback is enabled, it is an error for the client to call
+    /// [`MediaCodec::dequeue_input_buffer()`] or [`MediaCodec::dequeue_output_buffer()`].
+    ///
+    /// [`MediaCodec::flush()`] behaves differently in asynchronous mode. After calling
+    /// [`MediaCodec::flush()`], the client must call [`MediaCodec::start()`] to "resume" receiving
+    /// input buffers. Even if the client does not receive
+    /// [`AsyncNotifyCallback::on_input_available`] callbacks from video encoders configured with an
+    /// input surface, the client still needs to call [`MediaCodec::start()`] to resume the input
+    /// surface to send buffers to the encoders.
+    ///
+    /// When called with [`None`] callback, this method unregisters any previously set callback.
+    ///
+    /// Refer to the definition of [`AsyncNotifyCallback`] on how each callback function is called
+    /// and what are specified.
+    ///
+    /// Once the callback is unregistered or the codec is reset / released, the previously
+    /// registered callback will not be called.
+    ///
+    /// All callbacks are fired on one NDK internal thread.
+    /// [`MediaCodec::set_async_notify_callback()`] should not be called on the callback thread. No
+    /// heavy duty task should be performed on callback thread.
+    #[cfg(feature = "api-level-28")]
+    pub fn set_async_notify_callback(
+        &mut self,
+        callback: Option<AsyncNotifyCallback>,
+    ) -> Result<()> {
+        unsafe extern "C" fn ffi_on_input_available(
+            _codec: *mut ffi::AMediaCodec,
+            user_data: *mut c_void,
+            index: i32,
+        ) {
+            abort_on_panic(|| {
+                let callback = &mut *(user_data as *mut AsyncNotifyCallback);
+                if let Some(f) = callback.on_input_available.as_mut() {
+                    f(index as usize);
+                }
+            })
+        }
+
+        unsafe extern "C" fn ffi_on_output_available(
+            _codec: *mut ffi::AMediaCodec,
+            user_data: *mut c_void,
+            index: i32,
+            buffer_info: *mut ffi::AMediaCodecBufferInfo,
+        ) {
+            abort_on_panic(|| {
+                let callback = &mut *(user_data as *mut AsyncNotifyCallback);
+                if let Some(f) = callback.on_output_available.as_mut() {
+                    let buffer_info = BufferInfo {
+                        inner: *buffer_info,
+                    };
+                    f(index as usize, &buffer_info);
+                }
+            })
+        }
+
+        unsafe extern "C" fn ffi_on_format_changed(
+            _codec: *mut ffi::AMediaCodec,
+            user_data: *mut c_void,
+            format: *mut ffi::AMediaFormat,
+        ) {
+            abort_on_panic(|| {
+                // Ownership of the format is not documented, but the implementation allocates a new instance and does
+                // not free it, so assume it is ok for us to do so
+                // https://cs.android.com/android/platform/superproject/main/+/refs/heads/main:frameworks/av/media/ndk/NdkMediaCodec.cpp;l=248-254;drc=5e15c3e22f3fa32d64e57302201123ce41589adf
+                let format = MediaFormat::from_ptr(NonNull::new_unchecked(format));
+
+                let callback = &mut *(user_data as *mut AsyncNotifyCallback);
+                if let Some(f) = callback.on_format_changed.as_mut() {
+                    f(&format);
+                }
+            })
+        }
+
+        unsafe extern "C" fn ffi_on_error(
+            _codec: *mut ffi::AMediaCodec,
+            user_data: *mut c_void,
+            error: ffi::media_status_t,
+            action_code: i32,
+            detail: *const c_char,
+        ) {
+            abort_on_panic(|| {
+                let callback = &mut *(user_data as *mut AsyncNotifyCallback);
+                if let Some(f) = callback.on_error.as_mut() {
+                    f(
+                        MediaError::from_status(error).unwrap_err(),
+                        ActionCode(action_code),
+                        CStr::from_ptr(detail),
+                    );
+                }
+            })
+        }
+
+        let (callback, ffi_callback, user_data) = if let Some(callback) = callback {
+            // On Android 12 and earlier, due to faulty null checks, if a callback is not set, but at least one other
+            // callback *is* set, then it will segfault in when trying to invoke the unset callback. See for example:
+            // https://cs.android.com/android/platform/superproject/+/android-12.0.0_r34:frameworks/av/media/ndk/NdkMediaCodec.cpp;l=161-162;drc=ef058464777739e2d9ffad5f00d0e57b186d9a13
+            // To work around this we just enable all callbacks and do nothing if the corresponding callback is not set
+            // in AsyncNotifyCallback
+            let ffi_callback = ffi::AMediaCodecOnAsyncNotifyCallback {
+                onAsyncInputAvailable: Some(ffi_on_input_available),
+                onAsyncOutputAvailable: Some(ffi_on_output_available),
+                onAsyncFormatChanged: Some(ffi_on_format_changed),
+                onAsyncError: Some(ffi_on_error),
+            };
+
+            let mut boxed = Box::pin(callback);
+            let ptr: *mut AsyncNotifyCallback = &mut *boxed;
+
+            (Some(boxed), ffi_callback, ptr as *mut c_void)
+        } else {
+            let ffi_callback = ffi::AMediaCodecOnAsyncNotifyCallback {
+                onAsyncInputAvailable: None,
+                onAsyncOutputAvailable: None,
+                onAsyncFormatChanged: None,
+                onAsyncError: None,
+            };
+
+            (None, ffi_callback, ptr::null_mut())
+        };
+
+        let status = unsafe {
+            ffi::AMediaCodec_setAsyncNotifyCallback(self.as_ptr(), ffi_callback, user_data)
+        };
+        let result = MediaError::from_status(status);
+
+        // This behavior is not documented, but the implementation always clears the callback on failure, so we must
+        // clear any callback that may have been previously registered
+        // https://cs.android.com/android/platform/superproject/main/+/main:frameworks/av/media/ndk/NdkMediaCodec.cpp;l=581-584;drc=8c4e619c7461ac1a8c20c55364643662e9185e4d
+        if result.is_ok() {
+            self.async_notify_callback = callback;
+        } else {
+            self.async_notify_callback = None;
+        }
+
+        result
+    }
+
+    pub fn configure(
+        &self,
+        format: &MediaFormat,
+        surface: Option<&NativeWindow>,
+        direction: MediaCodecDirection,
+    ) -> Result<()> {
+        let status = unsafe {
+            ffi::AMediaCodec_configure(
+                self.as_ptr(),
+                format.as_ptr(),
+                surface.map_or(ptr::null_mut(), |s| s.ptr().as_ptr()),
+                ptr::null_mut(),
+                if direction == MediaCodecDirection::Encoder {
+                    ffi::AMEDIACODEC_CONFIGURE_FLAG_ENCODE as u32
+                } else {
+                    0
+                },
+            )
+        };
+        MediaError::from_status(status)
+    }
+
+    #[cfg(feature = "api-level-26")]
+    pub fn create_input_surface(&self) -> Result<NativeWindow> {
+        use crate::media_error::construct_never_null;
+        unsafe {
+            let ptr = construct_never_null(|res| {
+                ffi::AMediaCodec_createInputSurface(self.as_ptr(), res)
+            })?;
+            Ok(NativeWindow::from_ptr(ptr))
+        }
+    }
+
+    #[cfg(feature = "api-level-26")]
+    pub fn create_persistent_input_surface() -> Result<NativeWindow> {
+        use crate::media_error::construct_never_null;
+        unsafe {
+            let ptr =
+                construct_never_null(|res| ffi::AMediaCodec_createPersistentInputSurface(res))?;
+            Ok(NativeWindow::from_ptr(ptr))
+        }
+    }
+
+    pub fn dequeue_input_buffer(&self, timeout: Duration) -> Result<DequeuedInputBufferResult<'_>> {
+        let result = unsafe {
+            ffi::AMediaCodec_dequeueInputBuffer(
+                self.as_ptr(),
+                timeout
+                    .as_micros()
+                    .try_into()
+                    .expect("Supplied timeout is too large"),
+            )
+        };
+
+        if result == ffi::AMEDIACODEC_INFO_TRY_AGAIN_LATER as isize {
+            Ok(DequeuedInputBufferResult::TryAgainLater)
+        } else {
+            let index = MediaError::from_status_if_negative(result)? as usize;
+            Ok(DequeuedInputBufferResult::Buffer(InputBuffer {
+                codec: self,
+                index,
+            }))
+        }
+    }
+
+    pub fn dequeue_output_buffer(
+        &self,
+        timeout: Duration,
+    ) -> Result<DequeuedOutputBufferInfoResult<'_>> {
+        let mut info = MaybeUninit::uninit();
+
+        let result = unsafe {
+            ffi::AMediaCodec_dequeueOutputBuffer(
+                self.as_ptr(),
+                info.as_mut_ptr(),
+                timeout
+                    .as_micros()
+                    .try_into()
+                    .expect("Supplied timeout is too large"),
+            )
+        };
+
+        if result == ffi::AMEDIACODEC_INFO_TRY_AGAIN_LATER as isize {
+            Ok(DequeuedOutputBufferInfoResult::TryAgainLater)
+        } else if result == ffi::AMEDIACODEC_INFO_OUTPUT_FORMAT_CHANGED as isize {
+            Ok(DequeuedOutputBufferInfoResult::OutputFormatChanged)
+        } else if result == ffi::AMEDIACODEC_INFO_OUTPUT_BUFFERS_CHANGED as isize {
+            Ok(DequeuedOutputBufferInfoResult::OutputBuffersChanged)
+        } else {
+            let index = MediaError::from_status_if_negative(result)? as usize;
+            Ok(DequeuedOutputBufferInfoResult::Buffer(OutputBuffer {
+                codec: self,
+                index,
+                info: BufferInfo {
+                    inner: unsafe { info.assume_init() },
+                },
+            }))
+        }
+    }
+
+    pub fn flush(&self) -> Result<()> {
+        let status = unsafe { ffi::AMediaCodec_flush(self.as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    pub fn input_buffer(&self, index: usize) -> Option<&mut [MaybeUninit<u8>]> {
+        unsafe {
+            let mut out_size = 0;
+            let buffer_ptr = ffi::AMediaCodec_getInputBuffer(self.as_ptr(), index, &mut out_size);
+            if buffer_ptr.is_null() {
+                return None;
+            }
+            Some(slice::from_raw_parts_mut(buffer_ptr.cast(), out_size))
+        }
+    }
+
+    pub fn output_buffer(&self, index: usize) -> Option<&[u8]> {
+        unsafe {
+            let mut out_size = 0;
+            let buffer_ptr = ffi::AMediaCodec_getOutputBuffer(self.as_ptr(), index, &mut out_size);
+            if buffer_ptr.is_null() {
+                return None;
+            }
+            Some(slice::from_raw_parts(buffer_ptr, out_size))
+        }
+    }
+
+    #[cfg(feature = "api-level-28")]
+    pub fn input_format(&self) -> MediaFormat {
+        let inner = NonNull::new(unsafe { ffi::AMediaCodec_getInputFormat(self.as_ptr()) })
+            .expect("AMediaCodec_getInputFormat returned NULL");
+        unsafe { MediaFormat::from_ptr(inner) }
+    }
+
+    pub fn output_format(&self) -> MediaFormat {
+        let inner = NonNull::new(unsafe { ffi::AMediaCodec_getOutputFormat(self.as_ptr()) })
+            .expect("AMediaCodec_getOutputFormat returned NULL");
+        unsafe { MediaFormat::from_ptr(inner) }
+    }
+
+    #[cfg(feature = "api-level-28")]
+    pub fn name(&self) -> Result<String> {
+        use crate::media_error::construct;
+        unsafe {
+            let name_ptr = construct(|name| ffi::AMediaCodec_getName(self.as_ptr(), name))?;
+            let name = CStr::from_ptr(name_ptr).to_str().unwrap().to_owned();
+            ffi::AMediaCodec_releaseName(self.as_ptr(), name_ptr);
+
+            Ok(name)
+        }
+    }
+
+    pub fn queue_input_buffer(
+        &self,
+        buffer: InputBuffer<'_>,
+        offset: usize,
+        size: usize,
+        time: u64,
+        flags: u32,
+    ) -> Result<()> {
+        debug_assert!(ptr::eq(self, buffer.codec));
+        self.queue_input_buffer_by_index(buffer.index, offset, size, time, flags)
+    }
+
+    pub fn queue_input_buffer_by_index(
+        &self,
+        buffer_index: usize,
+        offset: usize,
+        size: usize,
+        time: u64,
+        flags: u32,
+    ) -> Result<()> {
+        let status = unsafe {
+            ffi::AMediaCodec_queueInputBuffer(
+                self.as_ptr(),
+                buffer_index,
+                offset as ffi::off_t,
+                size,
+                time,
+                flags,
+            )
+        };
+        MediaError::from_status(status)
+    }
+
+    pub fn release_output_buffer(&self, buffer: OutputBuffer<'_>, render: bool) -> Result<()> {
+        debug_assert!(ptr::eq(self, buffer.codec));
+        self.release_output_buffer_by_index(buffer.index, render)
+    }
+
+    pub fn release_output_buffer_by_index(&self, buffer_index: usize, render: bool) -> Result<()> {
+        let status =
+            unsafe { ffi::AMediaCodec_releaseOutputBuffer(self.as_ptr(), buffer_index, render) };
+        MediaError::from_status(status)
+    }
+
+    pub fn release_output_buffer_at_time(
+        &self,
+        buffer: OutputBuffer<'_>,
+        timestamp_ns: i64,
+    ) -> Result<()> {
+        debug_assert!(ptr::eq(self, buffer.codec));
+        self.release_output_buffer_at_time_by_index(buffer.index, timestamp_ns)
+    }
+
+    pub fn release_output_buffer_at_time_by_index(
+        &self,
+        buffer_index: usize,
+        timestamp_ns: i64,
+    ) -> Result<()> {
+        let status = unsafe {
+            ffi::AMediaCodec_releaseOutputBufferAtTime(self.as_ptr(), buffer_index, timestamp_ns)
+        };
+        MediaError::from_status(status)
+    }
+
+    #[cfg(feature = "api-level-26")]
+    pub fn set_input_surface(&self, surface: &NativeWindow) -> Result<()> {
+        let status =
+            unsafe { ffi::AMediaCodec_setInputSurface(self.as_ptr(), surface.ptr().as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    pub fn set_output_surface(&self, surface: &NativeWindow) -> Result<()> {
+        let status =
+            unsafe { ffi::AMediaCodec_setOutputSurface(self.as_ptr(), surface.ptr().as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    #[cfg(feature = "api-level-26")]
+    pub fn set_parameters(&self, params: MediaFormat) -> Result<()> {
+        let status = unsafe { ffi::AMediaCodec_setParameters(self.as_ptr(), params.as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    #[cfg(feature = "api-level-26")]
+    pub fn set_signal_end_of_input_stream(&self) -> Result<()> {
+        let status = unsafe { ffi::AMediaCodec_signalEndOfInputStream(self.as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    pub fn start(&self) -> Result<()> {
+        let status = unsafe { ffi::AMediaCodec_start(self.as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    pub fn stop(&self) -> Result<()> {
+        let status = unsafe { ffi::AMediaCodec_stop(self.as_ptr()) };
+        MediaError::from_status(status)
+    }
+}
+
+impl Drop for MediaCodec {
+    fn drop(&mut self) {
+        let status = unsafe { ffi::AMediaCodec_delete(self.as_ptr()) };
+        MediaError::from_status(status).unwrap();
+    }
+}
+
+#[derive(Debug)]
+pub struct InputBuffer<'a> {
+    codec: &'a MediaCodec,
+    index: usize,
+}
+
+impl InputBuffer<'_> {
+    pub fn buffer_mut(&mut self) -> &mut [MaybeUninit<u8>] {
+        self.codec.input_buffer(self.index).unwrap_or_else(|| {
+            panic!(
+                "AMediaCodec_getInputBuffer returned NULL for index {}",
+                self.index
+            )
+        })
+    }
+}
+
+#[derive(Debug)]
+pub enum DequeuedInputBufferResult<'a> {
+    Buffer(InputBuffer<'a>),
+    TryAgainLater,
+}
+
+#[derive(Debug)]
+pub struct OutputBuffer<'a> {
+    codec: &'a MediaCodec,
+    index: usize,
+    info: BufferInfo,
+}
+
+impl OutputBuffer<'_> {
+    pub fn buffer(&self) -> &[u8] {
+        self.codec.output_buffer(self.index).unwrap_or_else(|| {
+            panic!(
+                "AMediaCodec_getOutputBuffer returned NULL for index {}",
+                self.index
+            )
+        })
+    }
+
+    #[cfg(feature = "api-level-28")]
+    pub fn format(&self) -> MediaFormat {
+        let inner = NonNull::new(unsafe {
+            ffi::AMediaCodec_getBufferFormat(self.codec.as_ptr(), self.index)
+        })
+        .expect("AMediaCodec_getBufferFormat returned NULL");
+        unsafe { MediaFormat::from_ptr(inner) }
+    }
+
+    pub fn info(&self) -> &BufferInfo {
+        &self.info
+    }
+}
+
+#[derive(Debug)]
+pub enum DequeuedOutputBufferInfoResult<'a> {
+    Buffer(OutputBuffer<'a>),
+    TryAgainLater,
+    OutputFormatChanged,
+    OutputBuffersChanged,
+}
+
+#[derive(Copy, Clone, Debug)]
+pub struct BufferInfo {
+    inner: ffi::AMediaCodecBufferInfo,
+}
+
+impl BufferInfo {
+    pub fn offset(&self) -> i32 {
+        self.inner.offset
+    }
+
+    pub fn size(&self) -> i32 {
+        self.inner.size
+    }
+
+    pub fn presentation_time_us(&self) -> i64 {
+        self.inner.presentationTimeUs
+    }
+
+    pub fn flags(&self) -> u32 {
+        self.inner.flags
+    }
+}
+
+#[derive(Copy, Clone, Debug)]
+pub struct ActionCode(pub i32);
+
+impl ActionCode {
+    pub fn is_recoverable(self) -> bool {
+        unsafe { ffi::AMediaCodecActionCode_isRecoverable(self.0) }
+    }
+
+    pub fn is_transient(self) -> bool {
+        unsafe { ffi::AMediaCodecActionCode_isTransient(self.0) }
+    }
+}

clients/android/native/vendor/ndk/src/media/media_format.rs

@@ -0,0 +1,264 @@
+//! Bindings for [`AMediaFormat`]
+//!
+//! [`AMediaFormat`]: https://developer.android.com/ndk/reference/group/media#amediaformat
+
+use std::{
+    ffi::{CStr, CString},
+    fmt,
+    ptr::{self, NonNull},
+    slice,
+};
+
+use crate::media_error::{MediaError, Result};
+
+/// A native [`AMediaFormat *`]
+///
+/// [`AMediaFormat *`]: https://developer.android.com/ndk/reference/group/media#amediaformat
+#[doc(alias = "AMediaFormat")]
+pub struct MediaFormat {
+    inner: NonNull<ffi::AMediaFormat>,
+}
+
+impl fmt::Display for MediaFormat {
+    /// Human readable representation of the format.
+    #[doc(alias = "AMediaFormat_toString")]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        let c_str = unsafe { CStr::from_ptr(ffi::AMediaFormat_toString(self.as_ptr())) };
+        f.write_str(c_str.to_str().unwrap())
+    }
+}
+
+impl fmt::Debug for MediaFormat {
+    #[doc(alias = "AMediaFormat_toString")]
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "MediaFormat({:?}: {})", self.inner, self)
+    }
+}
+
+impl Default for MediaFormat {
+    #[doc(alias = "AMediaFormat_new")]
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
+impl MediaFormat {
+    /// Assumes ownership of `ptr`
+    ///
+    /// # Safety
+    /// `ptr` must be a valid pointer to an Android [`ffi::AMediaFormat`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::AMediaFormat>) -> Self {
+        Self { inner: ptr }
+    }
+
+    pub fn as_ptr(&self) -> *mut ffi::AMediaFormat {
+        self.inner.as_ptr()
+    }
+
+    #[doc(alias = "AMediaFormat_new")]
+    pub fn new() -> Self {
+        Self {
+            inner: NonNull::new(unsafe { ffi::AMediaFormat_new() }).unwrap(),
+        }
+    }
+
+    #[doc(alias = "AMediaFormat_getInt32")]
+    pub fn i32(&self, key: &str) -> Option<i32> {
+        let name = CString::new(key).unwrap();
+        let mut out = 0;
+        if unsafe { ffi::AMediaFormat_getInt32(self.as_ptr(), name.as_ptr(), &mut out) } {
+            Some(out)
+        } else {
+            None
+        }
+    }
+
+    #[doc(alias = "AMediaFormat_getInt64")]
+    pub fn i64(&self, key: &str) -> Option<i64> {
+        let name = CString::new(key).unwrap();
+        let mut out = 0;
+        if unsafe { ffi::AMediaFormat_getInt64(self.as_ptr(), name.as_ptr(), &mut out) } {
+            Some(out)
+        } else {
+            None
+        }
+    }
+
+    #[doc(alias = "AMediaFormat_getFloat")]
+    pub fn f32(&self, key: &str) -> Option<f32> {
+        let name = CString::new(key).unwrap();
+        let mut out = 0.0;
+        if unsafe { ffi::AMediaFormat_getFloat(self.as_ptr(), name.as_ptr(), &mut out) } {
+            Some(out)
+        } else {
+            None
+        }
+    }
+
+    #[doc(alias = "AMediaFormat_getSize")]
+    pub fn usize(&self, key: &str) -> Option<usize> {
+        let name = CString::new(key).unwrap();
+        let mut out = 0;
+        if unsafe { ffi::AMediaFormat_getSize(self.as_ptr(), name.as_ptr(), &mut out) } {
+            Some(out)
+        } else {
+            None
+        }
+    }
+
+    #[doc(alias = "AMediaFormat_getBuffer")]
+    pub fn buffer(&self, key: &str) -> Option<&[u8]> {
+        let name = CString::new(key).unwrap();
+        let mut out_buffer = ptr::null_mut();
+        let mut out_size = 0;
+        unsafe {
+            ffi::AMediaFormat_getBuffer(
+                self.as_ptr(),
+                name.as_ptr(),
+                &mut out_buffer,
+                &mut out_size,
+            )
+        }
+        .then(|| unsafe { slice::from_raw_parts(out_buffer.cast(), out_size) })
+    }
+
+    /// The returned `&str` borrow is only valid until the next call to [`MediaFormat::str()`] for
+    /// the same key.
+    #[doc(alias = "AMediaFormat_getString")]
+    pub fn str(&mut self, key: &str) -> Option<&str> {
+        let name = CString::new(key).unwrap();
+        let mut out = ptr::null();
+        unsafe { ffi::AMediaFormat_getString(self.as_ptr(), name.as_ptr(), &mut out) }
+            .then(|| unsafe { CStr::from_ptr(out) }.to_str().unwrap())
+    }
+
+    #[doc(alias = "AMediaFormat_setInt32")]
+    pub fn set_i32(&mut self, key: &str, value: i32) {
+        let name = CString::new(key).unwrap();
+        unsafe { ffi::AMediaFormat_setInt32(self.as_ptr(), name.as_ptr(), value) }
+    }
+
+    #[doc(alias = "AMediaFormat_setInt64")]
+    pub fn set_i64(&mut self, key: &str, value: i64) {
+        let name = CString::new(key).unwrap();
+        unsafe { ffi::AMediaFormat_setInt64(self.as_ptr(), name.as_ptr(), value) }
+    }
+
+    #[doc(alias = "AMediaFormat_setFloat")]
+    pub fn set_f32(&mut self, key: &str, value: f32) {
+        let name = CString::new(key).unwrap();
+        unsafe { ffi::AMediaFormat_setFloat(self.as_ptr(), name.as_ptr(), value) }
+    }
+
+    #[doc(alias = "AMediaFormat_setString")]
+    pub fn set_str(&mut self, key: &str, value: &str) {
+        let name = CString::new(key).unwrap();
+        let c_string = CString::new(value).unwrap();
+        unsafe { ffi::AMediaFormat_setString(self.as_ptr(), name.as_ptr(), c_string.as_ptr()) }
+    }
+
+    #[doc(alias = "AMediaFormat_setBuffer")]
+    pub fn set_buffer(&mut self, key: &str, value: &[u8]) {
+        let name = CString::new(key).unwrap();
+        unsafe {
+            ffi::AMediaFormat_setBuffer(
+                self.as_ptr(),
+                name.as_ptr(),
+                value.as_ptr().cast(),
+                value.len(),
+            )
+        }
+    }
+
+    #[cfg(feature = "api-level-28")]
+    #[doc(alias = "AMediaFormat_getDouble")]
+    pub fn f64(&self, key: &str) -> Option<f64> {
+        let name = CString::new(key).unwrap();
+        let mut out = 0.0;
+        if unsafe { ffi::AMediaFormat_getDouble(self.as_ptr(), name.as_ptr(), &mut out) } {
+            Some(out)
+        } else {
+            None
+        }
+    }
+
+    /// Returns (left, top, right, bottom)
+    #[cfg(feature = "api-level-28")]
+    #[doc(alias = "AMediaFormat_getRect")]
+    pub fn rect(&self, key: &str) -> Option<(i32, i32, i32, i32)> {
+        let name = CString::new(key).unwrap();
+        let mut left = 0;
+        let mut top = 0;
+        let mut right = 0;
+        let mut bottom = 0;
+        if unsafe {
+            ffi::AMediaFormat_getRect(
+                self.as_ptr(),
+                name.as_ptr(),
+                &mut left,
+                &mut top,
+                &mut right,
+                &mut bottom,
+            )
+        } {
+            Some((left, top, right, bottom))
+        } else {
+            None
+        }
+    }
+
+    #[cfg(feature = "api-level-28")]
+    #[doc(alias = "AMediaFormat_setDouble")]
+    pub fn set_f64(&mut self, key: &str, value: f64) {
+        let name = CString::new(key).unwrap();
+        unsafe { ffi::AMediaFormat_setDouble(self.as_ptr(), name.as_ptr(), value) }
+    }
+
+    #[cfg(feature = "api-level-28")]
+    #[doc(alias = "AMediaFormat_setRect")]
+    pub fn set_rect(&mut self, key: &str, left: i32, top: i32, right: i32, bottom: i32) {
+        let name = CString::new(key).unwrap();
+        unsafe { ffi::AMediaFormat_setRect(self.as_ptr(), name.as_ptr(), left, top, right, bottom) }
+    }
+
+    #[cfg(feature = "api-level-28")]
+    #[doc(alias = "AMediaFormat_setSize")]
+    pub fn set_usize(&mut self, key: &str, value: usize) {
+        let name = CString::new(key).unwrap();
+        unsafe { ffi::AMediaFormat_setSize(self.as_ptr(), name.as_ptr(), value) }
+    }
+
+    /// Copy one [`MediaFormat`] to another.
+    #[cfg(feature = "api-level-29")]
+    #[doc(alias = "AMediaFormat_copy")]
+    pub fn copy(&self, to: &mut Self) -> Result<()> {
+        let status = unsafe { ffi::AMediaFormat_copy(to.as_ptr(), self.as_ptr()) };
+        MediaError::from_status(status)
+    }
+
+    /// Clones this [`MediaFormat`] into a [`MediaFormat::new()`] object using
+    /// [`MediaFormat::copy()`].
+    #[cfg(feature = "api-level-29")]
+    #[doc(alias = "AMediaFormat_new")]
+    #[doc(alias = "AMediaFormat_copy")]
+    pub fn try_clone(&self) -> Result<Self> {
+        let mut copy = Self::new();
+        self.copy(&mut copy)?;
+        Ok(copy)
+    }
+
+    /// Remove all key/value pairs from this [`MediaFormat`].
+    #[cfg(feature = "api-level-29")]
+    #[doc(alias = "AMediaFormat_clear")]
+    pub fn clear(&mut self) {
+        unsafe { ffi::AMediaFormat_clear(self.as_ptr()) }
+    }
+}
+
+impl Drop for MediaFormat {
+    #[doc(alias = "AMediaFormat_delete")]
+    fn drop(&mut self) {
+        let status = unsafe { ffi::AMediaFormat_delete(self.as_ptr()) };
+        MediaError::from_status(status).unwrap()
+    }
+}

clients/android/native/vendor/ndk/src/media/mod.rs

@@ -0,0 +1,8 @@
+//! Bindings for the NDK media classes.
+//!
+//! See also [the NDK docs](https://developer.android.com/ndk/reference/group/media)
+#![cfg(feature = "media")]
+
+pub mod image_reader;
+pub mod media_codec;
+pub mod media_format;

clients/android/native/vendor/ndk/src/media_error.rs

@@ -0,0 +1,140 @@
+//! Bindings for NDK media status codes.
+//!
+//! Also used outside of `libmediandk.so` in `libamidi.so` for example.
+#![cfg(feature = "media")]
+// The cfg(feature) bounds for some pub(crate) fn uses are non-trivial and will become even more
+// complex going forward.  Allow them to be unused when compiling with certain feature combinations.
+#![allow(dead_code)]
+
+use std::{fmt, mem::MaybeUninit, ptr::NonNull};
+
+use num_enum::{FromPrimitive, IntoPrimitive};
+
+pub type Result<T, E = MediaError> = std::result::Result<T, E>;
+
+/// Media Status codes for [`media_status_t`](https://developer.android.com/ndk/reference/group/media#group___media_1ga009a49041fe39f7bdc6d8b5cddbe760c)
+#[repr(i32)]
+#[derive(Copy, Clone, Debug, PartialEq, Eq, FromPrimitive, IntoPrimitive)]
+#[doc(alias = "media_status_t")]
+#[non_exhaustive]
+pub enum MediaError {
+    #[doc(alias = "AMEDIACODEC_ERROR_INSUFFICIENT_RESOURCE")]
+    CodecErrorInsufficientResource = ffi::media_status_t::AMEDIACODEC_ERROR_INSUFFICIENT_RESOURCE.0,
+    #[doc(alias = "AMEDIACODEC_ERROR_RECLAIMED")]
+    CodecErrorReclaimed = ffi::media_status_t::AMEDIACODEC_ERROR_RECLAIMED.0,
+    #[doc(alias = "AMEDIA_ERROR_UNKNOWN")]
+    ErrorUnknown = ffi::media_status_t::AMEDIA_ERROR_UNKNOWN.0,
+    #[doc(alias = "AMEDIA_ERROR_MALFORMED")]
+    ErrorMalformed = ffi::media_status_t::AMEDIA_ERROR_MALFORMED.0,
+    #[doc(alias = "AMEDIA_ERROR_UNSUPPORTED")]
+    ErrorUnsupported = ffi::media_status_t::AMEDIA_ERROR_UNSUPPORTED.0,
+    #[doc(alias = "AMEDIA_ERROR_INVALID_OBJECT")]
+    ErrorInvalidObject = ffi::media_status_t::AMEDIA_ERROR_INVALID_OBJECT.0,
+    #[doc(alias = "AMEDIA_ERROR_INVALID_PARAMETER")]
+    ErrorInvalidParameter = ffi::media_status_t::AMEDIA_ERROR_INVALID_PARAMETER.0,
+    #[doc(alias = "AMEDIA_ERROR_INVALID_OPERATION")]
+    ErrorInvalidOperation = ffi::media_status_t::AMEDIA_ERROR_INVALID_OPERATION.0,
+    #[doc(alias = "AMEDIA_ERROR_END_OF_STREAM")]
+    ErrorEndOfStream = ffi::media_status_t::AMEDIA_ERROR_END_OF_STREAM.0,
+    #[doc(alias = "AMEDIA_ERROR_IO")]
+    ErrorIo = ffi::media_status_t::AMEDIA_ERROR_IO.0,
+    #[doc(alias = "AMEDIA_ERROR_WOULD_BLOCK")]
+    ErrorWouldBlock = ffi::media_status_t::AMEDIA_ERROR_WOULD_BLOCK.0,
+    #[doc(alias = "AMEDIA_DRM_ERROR_BASE")]
+    DrmErrorBase = ffi::media_status_t::AMEDIA_DRM_ERROR_BASE.0,
+    #[doc(alias = "AMEDIA_DRM_NOT_PROVISIONED")]
+    DrmNotProvisioned = ffi::media_status_t::AMEDIA_DRM_NOT_PROVISIONED.0,
+    #[doc(alias = "AMEDIA_DRM_RESOURCE_BUSY")]
+    DrmResourceBusy = ffi::media_status_t::AMEDIA_DRM_RESOURCE_BUSY.0,
+    #[doc(alias = "AMEDIA_DRM_DEVICE_REVOKED")]
+    DrmDeviceRevoked = ffi::media_status_t::AMEDIA_DRM_DEVICE_REVOKED.0,
+    #[doc(alias = "AMEDIA_DRM_SHORT_BUFFER")]
+    DrmShortBuffer = ffi::media_status_t::AMEDIA_DRM_SHORT_BUFFER.0,
+    #[doc(alias = "AMEDIA_DRM_SESSION_NOT_OPENED")]
+    DrmSessionNotOpened = ffi::media_status_t::AMEDIA_DRM_SESSION_NOT_OPENED.0,
+    #[doc(alias = "AMEDIA_DRM_TAMPER_DETECTED")]
+    DrmTamperDetected = ffi::media_status_t::AMEDIA_DRM_TAMPER_DETECTED.0,
+    #[doc(alias = "AMEDIA_DRM_VERIFY_FAILED")]
+    DrmVerifyFailed = ffi::media_status_t::AMEDIA_DRM_VERIFY_FAILED.0,
+    #[doc(alias = "AMEDIA_DRM_NEED_KEY")]
+    DrmNeedKey = ffi::media_status_t::AMEDIA_DRM_NEED_KEY.0,
+    #[doc(alias = "AMEDIA_DRM_LICENSE_EXPIRED")]
+    DrmLicenseExpired = ffi::media_status_t::AMEDIA_DRM_LICENSE_EXPIRED.0,
+    #[doc(alias = "AMEDIA_IMGREADER_ERROR_BASE")]
+    ImgreaderErrorBase = ffi::media_status_t::AMEDIA_IMGREADER_ERROR_BASE.0,
+    #[doc(alias = "AMEDIA_IMGREADER_CANNOT_LOCK_IMAGE")]
+    ImgreaderCannotLockImage = ffi::media_status_t::AMEDIA_IMGREADER_CANNOT_LOCK_IMAGE.0,
+    #[doc(alias = "AMEDIA_IMGREADER_CANNOT_UNLOCK_IMAGE")]
+    ImgreaderCannotUnlockImage = ffi::media_status_t::AMEDIA_IMGREADER_CANNOT_UNLOCK_IMAGE.0,
+    #[doc(alias = "AMEDIA_IMGREADER_IMAGE_NOT_LOCKED")]
+    ImgreaderImageNotLocked = ffi::media_status_t::AMEDIA_IMGREADER_IMAGE_NOT_LOCKED.0,
+
+    /// This error code is unknown to the [`ndk`][crate] crate.  Please report an issue if you
+    /// believe this code needs to be added to our mapping.
+    // Use the OK discriminant, as no-one will be able to call `as i32` and only has access to the
+    // constants via `From` provided by `IntoPrimitive` which reads the contained value.
+    // An autogenerated `<previous variant> + 1` discriminant is normally fine, except that the
+    // previous variant is negative and `+1` would match the variant before that.
+    #[doc(hidden)]
+    #[num_enum(catch_all)]
+    __Unknown(i32) = ffi::media_status_t::AMEDIA_OK.0,
+}
+
+impl fmt::Display for MediaError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{:?}", self)
+    }
+}
+
+impl std::error::Error for MediaError {}
+
+impl MediaError {
+    /// Returns [`Ok`] on [`ffi::media_status_t::AMEDIA_OK`], [`Err`] otherwise (including positive
+    /// values).
+    ///
+    /// Note that some known error codes (currently only for `AMediaCodec`) are positive.
+    pub(crate) fn from_status(status: ffi::media_status_t) -> Result<()> {
+        match status {
+            ffi::media_status_t::AMEDIA_OK => Ok(()),
+            x => Err(Self::from(x.0)),
+        }
+    }
+
+    /// Returns the original value in [`Ok`] if it is not negative, [`Err`] otherwise.
+    ///
+    /// Note that some [`ffi::media_status_t`] codes are positive but will never be returned as
+    /// [`Err`] from this function. As of writing these codes are specific to the `AMediaCodec` API
+    /// and should not be handled generically.
+    pub(crate) fn from_status_if_negative<T: Into<isize> + Copy>(value: T) -> Result<T> {
+        let v = value.into();
+        if v >= 0 {
+            Ok(value)
+        } else {
+            Err(Self::from(
+                i32::try_from(v).expect("Error code out of bounds"),
+            ))
+        }
+    }
+}
+
+/// Calls the `with_ptr` construction function with a pointer to uninitialized stack memory,
+/// expecting `with_ptr` to initialize it or otherwise return an error code.
+pub(crate) fn construct<T>(with_ptr: impl FnOnce(*mut T) -> ffi::media_status_t) -> Result<T> {
+    let mut result = MaybeUninit::uninit();
+    let status = with_ptr(result.as_mut_ptr());
+    MediaError::from_status(status).map(|()| unsafe { result.assume_init() })
+}
+
+/// Calls the `with_ptr` construction function with a pointer to a pointer, and expects `with_ptr`
+/// to initialize the second pointer to a valid address.  That address is returned in the form of a
+/// [`NonNull`] object.
+pub(crate) fn construct_never_null<T>(
+    with_ptr: impl FnOnce(*mut *mut T) -> ffi::media_status_t,
+) -> Result<NonNull<T>> {
+    let result = construct(with_ptr)?;
+    Ok(if cfg!(debug_assertions) {
+        NonNull::new(result).expect("result should never be null")
+    } else {
+        unsafe { NonNull::new_unchecked(result) }
+    })
+}

clients/android/native/vendor/ndk/src/native_activity.rs

@@ -0,0 +1,241 @@
+//! Bindings for [`ANativeActivity`]
+//!
+//! [`ANativeActivity`]: https://developer.android.com/ndk/reference/group/native-activity#anativeactivity
+
+use super::hardware_buffer_format::HardwareBufferFormat;
+use std::{
+    ffi::{CStr, OsStr},
+    os::{raw::c_void, unix::prelude::OsStrExt},
+    path::Path,
+    ptr::NonNull,
+};
+
+bitflags::bitflags! {
+    /// Window flags, as per the Java API at [`android.view.WindowManager.LayoutParams`].
+    ///
+    /// <https://developer.android.com/ndk/reference/group/native-activity#group___native_activity_1ga2f1398dba5e4a5616b83437528bdb28e>
+    ///
+    /// [`android.view.WindowManager.LayoutParams`]: https://developer.android.com/reference/android/view/WindowManager.LayoutParams
+    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq, PartialOrd, Ord)]
+    pub struct WindowFlags : u32 {
+        const ALLOW_LOCK_WHILE_SCREEN_ON = ffi::AWINDOW_FLAG_ALLOW_LOCK_WHILE_SCREEN_ON;
+        const DIM_BEHIND = ffi::AWINDOW_FLAG_DIM_BEHIND;
+        #[deprecated = "Deprecated. Blurring is no longer supported."]
+        const BLUR_BEHIND = ffi::AWINDOW_FLAG_BLUR_BEHIND;
+        const NOT_FOCUSABLE = ffi::AWINDOW_FLAG_NOT_FOCUSABLE;
+        const NOT_TOUCHABLE = ffi::AWINDOW_FLAG_NOT_TOUCHABLE;
+        const NOT_TOUCH_MODAL = ffi::AWINDOW_FLAG_NOT_TOUCH_MODAL;
+        #[deprecated = "This constant was deprecated in API level 20. This flag has no effect."]
+        const TOUCHABLE_WHEN_WAKING = ffi::AWINDOW_FLAG_TOUCHABLE_WHEN_WAKING;
+        const KEEP_SCREEN_ON = ffi::AWINDOW_FLAG_KEEP_SCREEN_ON;
+        const LAYOUT_IN_SCREEN = ffi::AWINDOW_FLAG_LAYOUT_IN_SCREEN;
+        const LAYOUT_NO_LIMITS = ffi::AWINDOW_FLAG_LAYOUT_NO_LIMITS;
+        const FULLSCREEN = ffi::AWINDOW_FLAG_FULLSCREEN;
+        #[cfg_attr(feature = "api-level-30", deprecated = "This constant was deprecated in API level 30. This value became API \"by accident\", and shouldn't be used by 3rd party applications.")]
+        const FORCE_NOT_FULLSCREEN = ffi::AWINDOW_FLAG_FORCE_NOT_FULLSCREEN;
+        #[deprecated = "This constant was deprecated in API level 17. This flag is no longer used."]
+        const DITHER = ffi::AWINDOW_FLAG_DITHER;
+        const SECURE = ffi::AWINDOW_FLAG_SECURE;
+        const SCALED = ffi::AWINDOW_FLAG_SCALED;
+        const IGNORE_CHEEK_PRESSES = ffi::AWINDOW_FLAG_IGNORE_CHEEK_PRESSES;
+        const LAYOUT_INSET_DECOR = ffi::AWINDOW_FLAG_LAYOUT_INSET_DECOR;
+        const ALT_FOCUSABLE_IM = ffi::AWINDOW_FLAG_ALT_FOCUSABLE_IM;
+        const WATCH_OUTSIDE_TOUCH = ffi::AWINDOW_FLAG_WATCH_OUTSIDE_TOUCH;
+        const SHOW_WHEN_LOCKED = ffi::AWINDOW_FLAG_SHOW_WHEN_LOCKED;
+        const SHOW_WALLPAPER = ffi::AWINDOW_FLAG_SHOW_WALLPAPER;
+        const TURN_SCREEN_ON = ffi::AWINDOW_FLAG_TURN_SCREEN_ON;
+        #[cfg_attr(feature = "api-level-26", deprecated = "This constant was deprecated in API level 26. Use `SHOW_WHEN_LOCKED` instead.")]
+        const DISMISS_KEYGUARD = ffi::AWINDOW_FLAG_DISMISS_KEYGUARD;
+        const ATTACHED_IN_DECOR = 0x40000000;
+
+        // https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags
+        const _ = !0;
+    }
+}
+
+/// A native [`ANativeActivity *`]
+///
+/// This is either provided in [`ffi::ANativeActivity_onCreate()`], or accessible through
+/// `ndk_glue::native_activity()`.
+///
+/// [`ANativeActivity *`]: https://developer.android.com/ndk/reference/struct/a-native-activity
+#[derive(Debug)]
+pub struct NativeActivity {
+    ptr: NonNull<ffi::ANativeActivity>,
+}
+
+// It gets shared between threads in `ndk-glue`
+unsafe impl Send for NativeActivity {}
+unsafe impl Sync for NativeActivity {}
+
+impl NativeActivity {
+    /// Create a [`NativeActivity`] from a pointer
+    ///
+    /// # Safety
+    /// By calling this function, you assert that it is a valid pointer to a native
+    /// [`ffi::ANativeActivity`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::ANativeActivity>) -> Self {
+        Self { ptr }
+    }
+
+    /// The pointer to the native `ANativeActivity`
+    pub fn ptr(&self) -> NonNull<ffi::ANativeActivity> {
+        self.ptr
+    }
+}
+
+/// Methods that relate to fields of the struct itself
+///
+/// The relevant NDK docs can be found
+/// [here](https://developer.android.com/ndk/reference/struct/a-native-activity).
+impl NativeActivity {
+    /// The platform's SDK version code
+    pub fn sdk_version(&self) -> i32 {
+        unsafe { self.ptr.as_ref().sdkVersion }
+    }
+
+    /// Path to this application's internal data directory
+    pub fn internal_data_path(&self) -> &Path {
+        OsStr::from_bytes(unsafe { CStr::from_ptr(self.ptr.as_ref().internalDataPath) }.to_bytes())
+            .as_ref()
+    }
+
+    /// Path to this application's external (removable, mountable) data directory
+    pub fn external_data_path(&self) -> &Path {
+        OsStr::from_bytes(unsafe { CStr::from_ptr(self.ptr.as_ref().externalDataPath) }.to_bytes())
+            .as_ref()
+    }
+
+    /// This app's asset manager, which can be used to access assets from the `.apk` file.
+    pub fn asset_manager(&self) -> crate::asset::AssetManager {
+        unsafe {
+            crate::asset::AssetManager::from_ptr(
+                NonNull::new(self.ptr.as_ref().assetManager).unwrap(),
+            )
+        }
+    }
+
+    /// Instance data associated with the activity
+    pub fn instance(&self) -> *mut c_void {
+        unsafe { self.ptr.as_ref().instance }
+    }
+
+    /// Set the instance data associated with the activity
+    ///
+    /// # Safety
+    /// This can invalidate assumptions held by `ndk-glue`, as well as cause data
+    /// races with concurrent access to the instance data.
+    pub unsafe fn set_instance(&mut self, data: *mut c_void) {
+        // FIXME Does this create undefined behavior by creating a mutable reference to what could
+        // also be accessed immutably at the same time?
+        //
+        // I think that as long as we warn the users to avoid concurrent access, and we pass along
+        // the `unsafe` burden, it's OK.
+        self.ptr.as_mut().instance = data;
+    }
+
+    /// This process's `JavaVM` object.
+    ///
+    /// Usage with [__jni__](https://crates.io/crates/jni) crate:
+    /// ```no_run
+    /// # use ndk::native_activity::NativeActivity;
+    /// # let native_activity: NativeActivity = unimplemented!();
+    /// let vm_ptr = native_activity.vm();
+    /// let vm = unsafe { jni::JavaVM::from_raw(vm_ptr) }.unwrap();
+    /// let env = vm.attach_current_thread();
+    /// // Do JNI with env ...
+    /// ```
+    pub fn vm(&self) -> *mut jni_sys::JavaVM {
+        unsafe { self.ptr.as_ref() }.vm
+    }
+
+    /// The [`android.app.NativeActivity`] instance
+    ///
+    /// In the JNI, this is named `clazz`; however, as the docs say, "it should really be named
+    /// 'activity' instead of 'clazz', since it's a reference to the NativeActivity instance".
+    ///
+    /// [`android.app.NativeActivity`]: https://developer.android.com/reference/android/app/NativeActivity
+    pub fn activity(&self) -> jni_sys::jobject {
+        unsafe { self.ptr.as_ref() }.clazz
+    }
+
+    /// Path to the directory with the application's OBB files.
+    ///
+    /// # Safety
+    /// Only available as of Honeycomb (Android 3.0+, API level 11+)
+    pub unsafe fn obb_path(&self) -> &Path {
+        OsStr::from_bytes(CStr::from_ptr(self.ptr.as_ref().obbPath).to_bytes()).as_ref()
+    }
+}
+
+/// Methods that relate to `ANativeActivity_*` functions.
+///
+/// The relevant NDK docs can be found
+/// [here](https://developer.android.com/ndk/reference/group/native-activity).
+impl NativeActivity {
+    /// Sends a destroy event to the activity and stops it.
+    pub fn finish(&self) {
+        unsafe { ffi::ANativeActivity_finish(self.ptr.as_ptr()) }
+    }
+
+    /// Shows the IME (the on-screen keyboard).
+    ///
+    /// If `force` is true, the `SHOW_FORCED` flag is used; otherwise, the `SHOW_IMPLICIT` flag is
+    /// used.  Depending on the value of this flag, the `hide_soft_input` method with behave
+    /// differently.  See [the relevant
+    /// javadoc](https://developer.android.com/reference/android/view/inputmethod/InputMethodManager#constants_2)
+    /// for more information.
+    pub fn show_soft_input(&self, force: bool) {
+        let flag = if force {
+            ffi::ANATIVEACTIVITY_SHOW_SOFT_INPUT_FORCED
+        } else {
+            ffi::ANATIVEACTIVITY_SHOW_SOFT_INPUT_IMPLICIT
+        };
+        unsafe { ffi::ANativeActivity_showSoftInput(self.ptr.as_ptr(), flag) }
+    }
+
+    /// Hides the IME (the on-screen keyboard).
+    ///
+    /// If `not_always` is true, the `HIDE_NOT_ALWAYS` flag is used; otherwise, the
+    /// `HIDE_IMPLICIT_ONLY` flag is used.  Depending on the value of this flag and the way the IME
+    /// was shown, it may or may not be hidden.  See [the relevant
+    /// javadoc](https://developer.android.com/reference/android/view/inputmethod/InputMethodManager#constants_2)
+    /// for more information.
+    pub fn hide_soft_input(&self, not_always: bool) {
+        let flag = if not_always {
+            ffi::ANATIVEACTIVITY_HIDE_SOFT_INPUT_NOT_ALWAYS
+        } else {
+            ffi::ANATIVEACTIVITY_HIDE_SOFT_INPUT_IMPLICIT_ONLY
+        };
+        unsafe { ffi::ANativeActivity_hideSoftInput(self.ptr.as_ptr(), flag) }
+    }
+
+    /// Change the window format of the given activity.
+    ///
+    /// Calls [`getWindow().setFormat()`] of the given activity. Note that this method can be
+    /// called from any thread; it will send a message to the main thread of the process where the
+    /// Java finish call will take place.
+    ///
+    /// [`getWindow().setFormat()`]: https://developer.android.com/reference/android/view/Window#setFormat(int)
+    pub fn set_window_format(&self, format: HardwareBufferFormat) {
+        unsafe { ffi::ANativeActivity_setWindowFormat(self.ptr.as_ptr(), format.into()) }
+    }
+
+    /// Change the window flags of the given activity.
+    ///
+    /// Calls [`getWindow().setFlags()`] of the given activity.
+    ///
+    /// Note that this method can be called from any thread; it will send a message to the main
+    /// thread of the process where the Java finish call will take place.
+    ///
+    /// [`getWindow().setFlags()`]: https://developer.android.com/reference/android/view/Window#setFlags(int,%20int)
+    pub fn set_window_flags(&self, add_flags: WindowFlags, remove_flags: WindowFlags) {
+        unsafe {
+            ffi::ANativeActivity_setWindowFlags(
+                self.ptr.as_ptr(),
+                add_flags.bits(),
+                remove_flags.bits(),
+            )
+        }
+    }
+}

clients/android/native/vendor/ndk/src/native_window.rs

@@ -0,0 +1,459 @@
+//! Bindings for [`ANativeWindow`]
+//!
+//! [`ANativeWindow`]: https://developer.android.com/ndk/reference/group/a-native-window#anativewindow
+
+use std::{ffi::c_void, io, mem::MaybeUninit, ptr::NonNull};
+
+use jni_sys::{jobject, JNIEnv};
+
+use super::{hardware_buffer_format::HardwareBufferFormat, utils::status_to_io_result};
+#[cfg(all(feature = "nativewindow", feature = "api-level-28"))]
+use crate::data_space::DataSpace;
+
+pub type Rect = ffi::ARect;
+
+// [`NativeWindow`] represents the producer end of an image queue
+///
+/// It is the C counterpart of the [`android.view.Surface`] object in Java, and can be converted
+/// both ways. Depending on the consumer, images submitted to [`NativeWindow`] can be shown on the
+/// display or sent to other consumers, such as video encoders.
+///
+/// [`android.view.Surface`]: https://developer.android.com/reference/android/view/Surface
+#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub struct NativeWindow {
+    ptr: NonNull<ffi::ANativeWindow>,
+}
+
+unsafe impl Send for NativeWindow {}
+unsafe impl Sync for NativeWindow {}
+
+impl Drop for NativeWindow {
+    fn drop(&mut self) {
+        unsafe { ffi::ANativeWindow_release(self.ptr.as_ptr()) }
+    }
+}
+
+impl Clone for NativeWindow {
+    fn clone(&self) -> Self {
+        unsafe { ffi::ANativeWindow_acquire(self.ptr.as_ptr()) }
+        Self { ptr: self.ptr }
+    }
+}
+
+#[cfg(feature = "rwh_04")]
+unsafe impl rwh_04::HasRawWindowHandle for NativeWindow {
+    fn raw_window_handle(&self) -> rwh_04::RawWindowHandle {
+        let mut handle = rwh_04::AndroidNdkHandle::empty();
+        handle.a_native_window = self.ptr.as_ptr().cast();
+        rwh_04::RawWindowHandle::AndroidNdk(handle)
+    }
+}
+
+#[cfg(feature = "rwh_05")]
+unsafe impl rwh_05::HasRawWindowHandle for NativeWindow {
+    fn raw_window_handle(&self) -> rwh_05::RawWindowHandle {
+        let mut handle = rwh_05::AndroidNdkWindowHandle::empty();
+        handle.a_native_window = self.ptr.as_ptr().cast();
+        rwh_05::RawWindowHandle::AndroidNdk(handle)
+    }
+}
+
+#[cfg(feature = "rwh_06")]
+impl rwh_06::HasWindowHandle for NativeWindow {
+    fn window_handle(&self) -> Result<rwh_06::WindowHandle<'_>, rwh_06::HandleError> {
+        let handle = rwh_06::AndroidNdkWindowHandle::new(self.ptr.cast());
+        let handle = rwh_06::RawWindowHandle::AndroidNdk(handle);
+        // SAFETY: All fields of the "raw" `AndroidNdkWindowHandle` struct are filled out.  The
+        // returned pointer is also kept valid by `NativeWindow` (until `Drop`), which is lifetime-
+        // borrowed in the returned `WindowHandle<'_>` and cannot be outlived.  Its value won't
+        // change throughout the lifetime of this `NativeWindow`.
+        Ok(unsafe { rwh_06::WindowHandle::borrow_raw(handle) })
+    }
+}
+
+impl NativeWindow {
+    /// Assumes ownership of `ptr`
+    ///
+    /// # Safety
+    /// `ptr` must be a valid pointer to an Android [`ffi::ANativeWindow`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::ANativeWindow>) -> Self {
+        Self { ptr }
+    }
+
+    /// Acquires ownership of `ptr`
+    ///
+    /// # Safety
+    /// `ptr` must be a valid pointer to an Android [`ffi::ANativeWindow`].
+    pub unsafe fn clone_from_ptr(ptr: NonNull<ffi::ANativeWindow>) -> Self {
+        ffi::ANativeWindow_acquire(ptr.as_ptr());
+        Self::from_ptr(ptr)
+    }
+
+    pub fn ptr(&self) -> NonNull<ffi::ANativeWindow> {
+        self.ptr
+    }
+
+    pub fn height(&self) -> i32 {
+        unsafe { ffi::ANativeWindow_getHeight(self.ptr.as_ptr()) }
+    }
+
+    pub fn width(&self) -> i32 {
+        unsafe { ffi::ANativeWindow_getWidth(self.ptr.as_ptr()) }
+    }
+
+    /// Return the current pixel format ([`HardwareBufferFormat`]) of the window surface.
+    pub fn format(&self) -> HardwareBufferFormat {
+        let value = unsafe { ffi::ANativeWindow_getFormat(self.ptr.as_ptr()) };
+        value.into()
+    }
+
+    /// Change the format and size of the window buffers.
+    ///
+    /// The width and height control the number of pixels in the buffers, not the dimensions of the
+    /// window on screen. If these are different than the window's physical size, then its buffer
+    /// will be scaled to match that size when compositing it to the screen. The width and height
+    /// must be either both zero or both non-zero.
+    ///
+    /// For all of these parameters, if `0` or [`None`] is supplied then the window's base value
+    /// will come back in force.
+    pub fn set_buffers_geometry(
+        &self,
+        width: i32,
+        height: i32,
+        format: Option<HardwareBufferFormat>,
+    ) -> io::Result<()> {
+        let format = format.map_or(0i32, |f| f.into());
+        let status = unsafe {
+            ffi::ANativeWindow_setBuffersGeometry(self.ptr.as_ptr(), width, height, format)
+        };
+        status_to_io_result(status)
+    }
+
+    /// Set a transform that will be applied to future buffers posted to the window.
+    #[cfg(all(feature = "nativewindow", feature = "api-level-26"))]
+    #[doc(alias = "ANativeWindow_setBuffersTransform")]
+    pub fn set_buffers_transform(&self, transform: NativeWindowTransform) -> io::Result<()> {
+        let status =
+            unsafe { ffi::ANativeWindow_setBuffersTransform(self.ptr.as_ptr(), transform.bits()) };
+        status_to_io_result(status)
+    }
+
+    /// All buffers queued after this call will be associated with the dataSpace parameter
+    /// specified.
+    ///
+    /// `data_space` specifies additional information about the buffer. For example, it can be used
+    /// to convey the color space of the image data in the buffer, or it can be used to indicate
+    /// that the buffers contain depth measurement data instead of color images. The default
+    /// dataSpace is `0`, [`DataSpace::Unknown`], unless it has been overridden by the producer.
+    #[cfg(all(feature = "nativewindow", feature = "api-level-28"))]
+    #[doc(alias = "ANativeWindow_setBuffersDataSpace")]
+    pub fn set_buffers_data_space(&self, data_space: DataSpace) -> io::Result<()> {
+        let status =
+            unsafe { ffi::ANativeWindow_setBuffersDataSpace(self.ptr.as_ptr(), data_space.into()) };
+        status_to_io_result(status)
+    }
+
+    /// Get the dataspace of the buffers in this [`NativeWindow`].
+    #[cfg(all(feature = "nativewindow", feature = "api-level-28"))]
+    #[doc(alias = "ANativeWindow_getBuffersDataSpace")]
+    pub fn buffers_data_space(&self) -> io::Result<DataSpace> {
+        let status = unsafe { ffi::ANativeWindow_getBuffersDataSpace(self.ptr.as_ptr()) };
+        if status >= 0 {
+            Ok(status.into())
+        } else {
+            Err(status_to_io_result(status).unwrap_err())
+        }
+    }
+
+    /// Sets the intended frame rate for this window.
+    ///
+    /// Same as [`set_frame_rate_with_change_strategy(window, frame_rate, compatibility, ChangeFrameRateStrategy::OnlyIfSeamless)`][`NativeWindow::set_frame_rate_with_change_strategy()`].
+    ///
+    #[cfg_attr(
+        not(feature = "api-level-31"),
+        doc = "[`NativeWindow::set_frame_rate_with_change_strategy()`]: https://developer.android.com/ndk/reference/group/a-native-window#anativewindow_setframeratewithchangestrategy"
+    )]
+    #[cfg(all(feature = "nativewindow", feature = "api-level-30"))]
+    #[doc(alias = "ANativeWindow_setFrameRate")]
+    pub fn set_frame_rate(
+        &self,
+        frame_rate: f32,
+        compatibility: FrameRateCompatibility,
+    ) -> io::Result<()> {
+        let status = unsafe {
+            ffi::ANativeWindow_setFrameRate(self.ptr.as_ptr(), frame_rate, compatibility as i8)
+        };
+        status_to_io_result(status)
+    }
+
+    /// Sets the intended frame rate for this window.
+    ///
+    /// On devices that are capable of running the display at different refresh rates, the system
+    /// may choose a display refresh rate to better match this window's frame rate. Usage of this
+    /// API won't introduce frame rate throttling, or affect other aspects of the application's
+    /// frame production pipeline. However, because the system may change the display refresh rate,
+    /// calls to this function may result in changes to Choreographer callback timings, and changes
+    /// to the time interval at which the system releases buffers back to the application.
+    ///
+    /// Note that this only has an effect for windows presented on the display. If this
+    /// [`NativeWindow`] is consumed by something other than the system compositor, e.g. a media
+    /// codec, this call has no effect.
+    ///
+    /// You can register for changes in the refresh rate using
+    /// [`ffi::AChoreographer_registerRefreshRateCallback()`].
+    ///
+    /// # Parameters
+    ///
+    /// - `frame_rate`: The intended frame rate of this window, in frames per second. `0` is a
+    ///   special value that indicates the app will accept the system's choice for the display
+    ///   frame rate, which is the default behavior if this function isn't called. The `frame_rate`
+    ///   param does not need to be a valid refresh rate for this device's display - e.g., it's
+    ///   fine to pass `30`fps to a device that can only run the display at `60`fps.
+    /// - `compatibility`: The frame rate compatibility of this window. The compatibility value may
+    ///   influence the system's choice of display refresh rate. See the [`FrameRateCompatibility`]
+    ///   values for more info. This parameter is ignored when `frame_rate` is `0`.
+    /// - `change_frame_rate_strategy`: Whether display refresh rate transitions caused by this
+    ///   window should be seamless. A seamless transition is one that doesn't have any visual
+    ///   interruptions, such as a black screen for a second or two. See the
+    ///   [`ChangeFrameRateStrategy`] values. This parameter is ignored when `frame_rate` is `0`.
+    #[cfg(all(feature = "nativewindow", feature = "api-level-31"))]
+    #[doc(alias = "ANativeWindow_setFrameRateWithChangeStrategy")]
+    pub fn set_frame_rate_with_change_strategy(
+        &self,
+        frame_rate: f32,
+        compatibility: FrameRateCompatibility,
+        change_frame_rate_strategy: ChangeFrameRateStrategy,
+    ) -> io::Result<()> {
+        let status = unsafe {
+            ffi::ANativeWindow_setFrameRateWithChangeStrategy(
+                self.ptr.as_ptr(),
+                frame_rate,
+                compatibility as i8,
+                change_frame_rate_strategy as i8,
+            )
+        };
+        status_to_io_result(status)
+    }
+
+    /// Provides a hint to the window that buffers should be preallocated ahead of time.
+    ///
+    /// Note that the window implementation is not guaranteed to preallocate any buffers, for
+    /// instance if an implementation disallows allocation of new buffers, or if there is
+    /// insufficient memory in the system to preallocate additional buffers
+    #[cfg(all(feature = "nativewindow", feature = "api-level-30"))]
+    pub fn try_allocate_buffers(&self) {
+        unsafe { ffi::ANativeWindow_tryAllocateBuffers(self.ptr.as_ptr()) }
+    }
+
+    /// Return the [`NativeWindow`] associated with a JNI [`android.view.Surface`] pointer.
+    ///
+    /// # Safety
+    /// By calling this function, you assert that `env` is a valid pointer to a [`JNIEnv`] and
+    /// `surface` is a valid pointer to an [`android.view.Surface`].
+    ///
+    /// [`android.view.Surface`]: https://developer.android.com/reference/android/view/Surface
+    pub unsafe fn from_surface(env: *mut JNIEnv, surface: jobject) -> Option<Self> {
+        let ptr = ffi::ANativeWindow_fromSurface(env, surface);
+        Some(Self::from_ptr(NonNull::new(ptr)?))
+    }
+
+    /// Return a JNI [`android.view.Surface`] pointer derived from this [`NativeWindow`].
+    ///
+    /// # Safety
+    /// By calling this function, you assert that `env` is a valid pointer to a [`JNIEnv`].
+    ///
+    /// [`android.view.Surface`]: https://developer.android.com/reference/android/view/Surface
+    #[cfg(feature = "api-level-26")]
+    pub unsafe fn to_surface(&self, env: *mut JNIEnv) -> jobject {
+        ffi::ANativeWindow_toSurface(env, self.ptr().as_ptr())
+    }
+
+    /// Lock the window's next drawing surface for writing.
+    ///
+    /// Optionally pass the region you intend to draw into `dirty_bounds`.  When this function
+    /// returns it is updated (commonly enlarged) with the actual area the caller needs to redraw.
+    pub fn lock(
+        &self,
+        dirty_bounds: Option<&mut Rect>,
+    ) -> io::Result<NativeWindowBufferLockGuard<'_>> {
+        let dirty_bounds = match dirty_bounds {
+            Some(dirty_bounds) => dirty_bounds,
+            None => std::ptr::null_mut(),
+        };
+        let mut buffer = MaybeUninit::uninit();
+        let status = unsafe {
+            ffi::ANativeWindow_lock(self.ptr.as_ptr(), buffer.as_mut_ptr(), dirty_bounds)
+        };
+        status_to_io_result(status)?;
+
+        Ok(NativeWindowBufferLockGuard {
+            window: self,
+            buffer: unsafe { buffer.assume_init() },
+        })
+    }
+}
+
+/// Lock holding the next drawing surface for writing.  It is unlocked and posted on [`drop()`].
+#[derive(Debug)]
+pub struct NativeWindowBufferLockGuard<'a> {
+    window: &'a NativeWindow,
+    buffer: ffi::ANativeWindow_Buffer,
+}
+
+impl<'a> NativeWindowBufferLockGuard<'a> {
+    /// The number of pixels that are shown horizontally.
+    pub fn width(&self) -> usize {
+        usize::try_from(self.buffer.width).unwrap()
+    }
+
+    // The number of pixels that are shown vertically.
+    pub fn height(&self) -> usize {
+        usize::try_from(self.buffer.height).unwrap()
+    }
+
+    /// The number of _pixels_ that a line in the buffer takes in memory.
+    ///
+    /// This may be `>= width`.
+    pub fn stride(&self) -> usize {
+        usize::try_from(self.buffer.stride).unwrap()
+    }
+
+    /// The format of the buffer. One of [`HardwareBufferFormat`].
+    pub fn format(&self) -> HardwareBufferFormat {
+        self.buffer.format.into()
+    }
+
+    /// The actual bits.
+    ///
+    /// This points to a memory segment of [`stride()`][Self::stride()] *
+    /// [`height()`][Self::height()] * [`HardwareBufferFormat::bytes_per_pixel()`] bytes.
+    ///
+    /// Only [`width()`][Self::width()] pixels are visible for each [`stride()`][Self::stride()]
+    /// line of pixels in the buffer.
+    ///
+    /// See [`bytes()`][Self::bytes()] for safe access to these bytes.
+    pub fn bits(&mut self) -> *mut c_void {
+        self.buffer.bits
+    }
+
+    /// Safe write access to likely uninitialized pixel buffer data.
+    ///
+    /// Returns [`None`] when there is no [`HardwareBufferFormat::bytes_per_pixel()`] size
+    /// available for this [`format()`][Self::format()].
+    ///
+    /// The returned slice consists of [`stride()`][Self::stride()] * [`height()`][Self::height()]
+    /// \* [`HardwareBufferFormat::bytes_per_pixel()`] bytes.
+    ///
+    /// Only [`width()`][Self::width()] pixels are visible for each [`stride()`][Self::stride()]
+    /// line of pixels in the buffer.
+    pub fn bytes(&mut self) -> Option<&mut [MaybeUninit<u8>]> {
+        let num_pixels = self.stride() * self.height();
+        let num_bytes = num_pixels * self.format().bytes_per_pixel()?;
+        Some(unsafe { std::slice::from_raw_parts_mut(self.bits().cast(), num_bytes) })
+    }
+
+    /// Returns a slice of bytes for each line of visible pixels in the buffer, ignoring any
+    /// padding pixels incurred by the stride.
+    ///
+    /// See [`bits()`][Self::bits()] and [`bytes()`][Self::bytes()] for contiguous access to the
+    /// underlying buffer.
+    pub fn lines(&mut self) -> Option<impl Iterator<Item = &mut [MaybeUninit<u8>]>> {
+        let bpp = self.format().bytes_per_pixel()?;
+        let scanline_bytes = bpp * self.stride();
+        let width_bytes = bpp * self.width();
+        let bytes = self.bytes()?;
+
+        Some(
+            bytes
+                .chunks_exact_mut(scanline_bytes)
+                .map(move |scanline| &mut scanline[..width_bytes]),
+        )
+    }
+}
+
+impl<'a> Drop for NativeWindowBufferLockGuard<'a> {
+    fn drop(&mut self) {
+        let ret = unsafe { ffi::ANativeWindow_unlockAndPost(self.window.ptr.as_ptr()) };
+        assert_eq!(ret, 0);
+    }
+}
+
+#[cfg(all(feature = "nativewindow", feature = "api-level-26"))]
+bitflags::bitflags! {
+    /// Transforms that can be applied to buffers as they are displayed to a window.
+    ///
+    /// Supported transforms are any combination of horizontal mirror, vertical mirror, and
+    /// clockwise 90 degree rotation, in that order. Rotations of 180 and 270 degrees are made up
+    /// of those basic transforms.
+    #[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+    #[doc(alias = "ANativeWindowTransform")]
+    pub struct NativeWindowTransform : i32 {
+        #[doc(alias = "ANATIVEWINDOW_TRANSFORM_IDENTITY")]
+        const IDENTITY = ffi::ANativeWindowTransform::ANATIVEWINDOW_TRANSFORM_IDENTITY.0 as i32;
+        #[doc(alias = "ANATIVEWINDOW_TRANSFORM_MIRROR_HORIZONTAL")]
+        const MIRROR_HORIZONTAL = ffi::ANativeWindowTransform::ANATIVEWINDOW_TRANSFORM_MIRROR_HORIZONTAL.0 as i32;
+        #[doc(alias = "ANATIVEWINDOW_TRANSFORM_MIRROR_VERTICAL")]
+        const MIRROR_VERTICAL = ffi::ANativeWindowTransform::ANATIVEWINDOW_TRANSFORM_MIRROR_VERTICAL.0 as i32;
+        #[doc(alias = "ANATIVEWINDOW_TRANSFORM_ROTATE_90")]
+        const ROTATE_90 = ffi::ANativeWindowTransform::ANATIVEWINDOW_TRANSFORM_ROTATE_90.0 as i32;
+        /// Defined as [`Self::MIRROR_HORIZONTAL`] `|` [`Self::MIRROR_VERTICAL`].
+        #[doc(alias = "ANATIVEWINDOW_TRANSFORM_ROTATE_180")]
+        const ROTATE_180 = ffi::ANativeWindowTransform::ANATIVEWINDOW_TRANSFORM_ROTATE_180.0 as i32;
+        /// Defined as [`Self::ROTATE_180`] `|` [`Self::ROTATE_90`].
+        #[doc(alias = "ANATIVEWINDOW_TRANSFORM_ROTATE_270")]
+        const ROTATE_270 = ffi::ANativeWindowTransform::ANATIVEWINDOW_TRANSFORM_ROTATE_270.0 as i32;
+
+        // https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags
+        const _ = !0;
+    }
+}
+
+/// Compatibility value for [`NativeWindow::set_frame_rate()`]
+#[cfg_attr(
+    feature = "api-level-31",
+    doc = " and [`NativeWindow::set_frame_rate_with_change_strategy()`]"
+)]
+/// .
+#[cfg(all(feature = "nativewindow", feature = "api-level-30"))]
+#[repr(i8)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+#[doc(alias = "ANativeWindow_FrameRateCompatibility")]
+#[non_exhaustive]
+pub enum FrameRateCompatibility {
+    /// There are no inherent restrictions on the frame rate of this window.
+    ///
+    /// When the system selects a frame rate other than what the app requested, the app will be
+    /// able to run at the system frame rate without requiring pull down. This value should be used
+    /// when displaying game content, UIs, and anything that isn't video.
+    #[doc(alias = "ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_DEFAULT")]
+    Default =
+        ffi::ANativeWindow_FrameRateCompatibility::ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_DEFAULT.0 as i8,
+    /// This window is being used to display content with an inherently fixed frame rate, e.g. a
+    /// video that has a specific frame rate.
+    ///
+    /// When the system selects a frame rate other than what the app requested, the app will need
+    /// to do pull down or use some other technique to adapt to the system's frame rate. The user
+    /// experience is likely to be worse (e.g. more frame stuttering) than it would be if the
+    /// system had chosen the app's requested frame rate. This value should be used for video
+    /// content.
+    #[doc(alias = "ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_FIXED_SOURCE")]
+    FixedSource = ffi::ANativeWindow_FrameRateCompatibility::ANATIVEWINDOW_FRAME_RATE_COMPATIBILITY_FIXED_SOURCE.0 as i8,
+}
+
+/// Change frame rate strategy value for [`NativeWindow::set_frame_rate_with_change_strategy()`].
+#[cfg(all(feature = "nativewindow", feature = "api-level-31"))]
+#[repr(i8)]
+#[derive(Clone, Copy, Debug, Hash, PartialEq, Eq)]
+#[doc(alias = "ANativeWindow_ChangeFrameRateStrategy")]
+#[non_exhaustive]
+pub enum ChangeFrameRateStrategy {
+    /// Change the frame rate only if the transition is going to be seamless.
+    #[doc(alias = "ANATIVEWINDOW_CHANGE_FRAME_RATE_ONLY_IF_SEAMLESS")]
+    OnlyIfSeamless =
+        ffi::ANativeWindow_ChangeFrameRateStrategy::ANATIVEWINDOW_CHANGE_FRAME_RATE_ONLY_IF_SEAMLESS
+            .0 as i8,
+    /// Change the frame rate even if the transition is going to be non-seamless, i.e. with visual interruptions for the user.
+    #[doc(alias = "ANATIVEWINDOW_CHANGE_FRAME_RATE_ALWAYS")]
+    Always =
+        ffi::ANativeWindow_ChangeFrameRateStrategy::ANATIVEWINDOW_CHANGE_FRAME_RATE_ALWAYS.0 as i8,
+}

clients/android/native/vendor/ndk/src/shared_memory.rs

@@ -0,0 +1,153 @@
+//! Bindings for [`ASharedMemory`]
+//!
+//! [`ASharedMemory`]: https://developer.android.com/ndk/reference/group/memory
+#![cfg(feature = "api-level-26")]
+
+use std::{
+    ffi::CStr,
+    io::{Error, Result},
+    // TODO: Import from std::os::fd::{} since Rust 1.66
+    os::unix::io::{AsFd, AsRawFd, BorrowedFd, FromRawFd, IntoRawFd, OwnedFd, RawFd},
+    ptr,
+};
+
+#[cfg(feature = "api-level-27")]
+use jni_sys::{jobject, JNIEnv};
+
+/// Enables the creation, mapping, and protection control over anonymous shared memory.
+#[derive(Debug)]
+#[doc(alias = "ASharedMemory")]
+pub struct SharedMemory(OwnedFd);
+
+impl SharedMemory {
+    /// Create a shared memory region.
+    ///
+    /// Creates shared memory region and returns a file descriptor. The resulting file descriptor
+    /// can be `mmap`'ed to process memory space with `PROT_READ | PROT_WRITE | PROT_EXEC`. Access
+    /// to this shared memory region can be restricted with [`set_prot()`][Self::set_prot()].
+    ///
+    /// Use [`android.os.ParcelFileDescriptor`] to pass the file descriptor to another process.
+    /// File descriptors may also be sent to other processes over a Unix domain socket with
+    /// `sendmsg` and `SCM_RIGHTS`. See `sendmsg(3)` and `cmsg(3)` man pages for more information.
+    ///
+    /// If you intend to share this file descriptor with a child process after calling `exec(3)`,
+    /// note that you will need to use `fcntl(2)` with `F_SETFD` to clear the `FD_CLOEXEC` flag for
+    /// this to work on all versions of Android.
+    ///
+    /// [`android.os.ParcelFileDescriptor`]: https://developer.android.com/reference/android/os/ParcelFileDescriptor
+    #[doc(alias = "ASharedMemory_create")]
+    pub fn create(name: Option<&CStr>, size: usize) -> Result<Self> {
+        let fd =
+            unsafe { ffi::ASharedMemory_create(name.map_or(ptr::null(), |p| p.as_ptr()), size) };
+        if fd < 0 {
+            Err(Error::last_os_error())
+        } else {
+            Ok(unsafe { Self::from_raw_fd(fd) })
+        }
+    }
+
+    /// Returns a `dup`'d FD from the given Java [`android.os.SharedMemory`] object.
+    ///
+    /// The returned file descriptor has all the same properties & capabilities as the FD returned
+    /// from [`create()`][Self::create()], however the protection flags will be the same as those
+    /// of the [`android.os.SharedMemory`] object.
+    ///
+    /// [`android.os.SharedMemory`]: https://developer.android.com/reference/android/os/SharedMemory
+    #[cfg(feature = "api-level-27")]
+    #[doc(alias = "ASharedMemory_dupFromJava")]
+    #[allow(clippy::not_unsafe_ptr_arg_deref)]
+    pub fn dup_from_java(env: *mut JNIEnv, shared_memory: jobject) -> Result<Self> {
+        let fd = unsafe { ffi::ASharedMemory_dupFromJava(env, shared_memory) };
+        if fd < 0 {
+            Err(Error::last_os_error())
+        } else {
+            Ok(unsafe { Self::from_raw_fd(fd) })
+        }
+    }
+
+    /// Get the size of the shared memory region.
+    #[doc(alias = "ASharedMemory_getSize")]
+    pub fn size(&self) -> usize {
+        unsafe { ffi::ASharedMemory_getSize(self.as_raw_fd()) }
+    }
+
+    /// Restrict access of shared memory region.
+    ///
+    /// This function restricts access of a shared memory region. Access can only be removed. The
+    /// effect applies globally to all file descriptors in all processes across the system that
+    /// refer to this shared memory region. Existing memory mapped regions are not affected.
+    ///
+    /// It is a common use case to create a shared memory region, map it read/write locally to
+    /// initialize content, and then send the shared memory to another process with read only
+    /// access. Code example as below:
+    ///
+    /// ```no_run
+    /// # use ndk::shared_memory::SharedMemory;
+    /// # // TODO: Import from std::os::fd::{} since Rust 1.66
+    /// # use std::os::unix::io::AsRawFd;
+    /// # use std::ffi::CStr;
+    /// # unsafe {
+    /// let mem = SharedMemory::create(Some(CStr::from_bytes_with_nul_unchecked(b"memory\0")), 127).unwrap();
+    /// // By default it has PROT_READ | PROT_WRITE | PROT_EXEC.
+    /// let size = mem.size();
+    /// let buffer = libc::mmap(
+    ///     std::ptr::null_mut(),
+    ///     size,
+    ///     libc::PROT_READ | libc::PROT_WRITE,
+    ///     libc::MAP_SHARED,
+    ///     mem.as_raw_fd(),
+    ///     0,
+    /// );
+    /// let buffer_slice = std::slice::from_raw_parts_mut(buffer.cast(), size);
+    ///
+    /// // trivially initialize content
+    /// buffer_slice[..7].copy_from_slice(b"hello!\0");
+    ///
+    /// // Existing mappings will retain their protection flags (PROT_WRITE here) after set_prod()
+    /// // unless it is unmapped:
+    /// libc::munmap(buffer, size);
+    ///
+    /// // limit access to read only
+    /// mem.set_prot(libc::PROT_READ);
+    ///
+    /// // share fd with another process here and the other process can only map with PROT_READ.
+    /// # }
+    /// ```
+    #[doc(alias = "ASharedMemory_setProt")]
+    pub fn set_prot(&self, prot: i32) -> Result<()> {
+        let status = unsafe { ffi::ASharedMemory_setProt(self.as_raw_fd(), prot) };
+        if status < 0 {
+            Err(Error::last_os_error())
+        } else {
+            Ok(())
+        }
+    }
+}
+
+impl AsFd for SharedMemory {
+    fn as_fd(&self) -> BorrowedFd<'_> {
+        self.0.as_fd()
+    }
+}
+
+impl AsRawFd for SharedMemory {
+    fn as_raw_fd(&self) -> RawFd {
+        self.0.as_raw_fd()
+    }
+}
+
+impl IntoRawFd for SharedMemory {
+    fn into_raw_fd(self) -> RawFd {
+        self.0.into_raw_fd()
+    }
+}
+
+impl FromRawFd for SharedMemory {
+    /// # Safety
+    ///
+    /// The resource pointed to by `fd` must be open and suitable for assuming
+    /// ownership. The resource must not require any cleanup other than `close`.
+    unsafe fn from_raw_fd(fd: RawFd) -> Self {
+        Self(OwnedFd::from_raw_fd(fd))
+    }
+}

clients/android/native/vendor/ndk/src/surface_texture.rs

@@ -0,0 +1,159 @@
+//! Bindings for [`ASurfaceTexture`]
+//!
+//! See <https://source.android.com/devices/graphics/arch-st> for an architectural overview of
+//! [`SurfaceTexture`] internals.
+//!
+//! [`ASurfaceTexture`]: https://developer.android.com/ndk/reference/group/surface-texture
+#![cfg(feature = "api-level-28")]
+
+use crate::{native_window::NativeWindow, utils::status_to_io_result};
+use jni_sys::{jobject, JNIEnv};
+use std::{io::Result, ptr::NonNull, time::Duration};
+
+/// An opaque type to manage [`android.graphics.SurfaceTexture`] from native code
+///
+/// [`android.graphics.SurfaceTexture`]: https://developer.android.com/reference/android/graphics/SurfaceTexture
+#[derive(Debug, Eq, Hash, Ord, PartialEq, PartialOrd)]
+pub struct SurfaceTexture {
+    ptr: NonNull<ffi::ASurfaceTexture>,
+}
+
+unsafe impl Send for SurfaceTexture {}
+
+impl Drop for SurfaceTexture {
+    fn drop(&mut self) {
+        unsafe { ffi::ASurfaceTexture_release(self.ptr.as_ptr()) }
+    }
+}
+
+impl SurfaceTexture {
+    /// Assumes ownership of `ptr`
+    ///
+    /// # Safety
+    /// `ptr` must be a valid pointer to an Android [`ffi::ASurfaceTexture`].
+    pub unsafe fn from_ptr(ptr: NonNull<ffi::ASurfaceTexture>) -> Self {
+        Self { ptr }
+    }
+
+    /// Get a reference to the native [`SurfaceTexture`] from the corresponding Java object.
+    ///
+    /// # Safety
+    ///
+    /// This function should be called with a healthy JVM pointer and with a non-null
+    /// [`android.graphics.SurfaceTexture`], which must be kept alive on the Java/Kotlin side.
+    ///
+    /// The caller must keep a reference to the Java [`android.graphics.SurfaceTexture`] during the
+    /// lifetime of the returned [`SurfaceTexture`]. Failing to do so could result in the
+    /// [`SurfaceTexture`] to stop functioning properly once the Java object gets finalized.
+    /// However, this will not result in program termination.
+    ///
+    /// [`android.graphics.SurfaceTexture`]: https://developer.android.com/reference/android/graphics/SurfaceTexture
+    pub unsafe fn from_surface_texture(env: *mut JNIEnv, surface_texture: jobject) -> Option<Self> {
+        let a_surface_texture_ptr = ffi::ASurfaceTexture_fromSurfaceTexture(env, surface_texture);
+        let s = NonNull::new(a_surface_texture_ptr)?;
+        Some(SurfaceTexture::from_ptr(s))
+    }
+
+    /// Returns a pointer to the native [`ffi::ASurfaceTexture`].
+    pub fn ptr(&self) -> NonNull<ffi::ASurfaceTexture> {
+        self.ptr
+    }
+
+    /// Returns a reference to a [`NativeWindow`] (i.e. the Producer) for this [`SurfaceTexture`].
+    ///
+    /// This is equivalent to Java's:
+    /// ```java
+    /// Surface sur = new Surface(surfaceTexture);
+    /// ```
+    pub fn acquire_native_window(&self) -> Option<NativeWindow> {
+        let native_window = unsafe { ffi::ASurfaceTexture_acquireANativeWindow(self.ptr.as_ptr()) };
+        let n = NonNull::new(native_window)?;
+        Some(unsafe { NativeWindow::from_ptr(n) })
+    }
+
+    /// Attach the [`SurfaceTexture`] to the OpenGL ES context that is current on the calling
+    /// thread.
+    ///
+    /// A new OpenGL ES texture object is created and populated with the [`SurfaceTexture`] image
+    /// frame that was current at the time of the last call to
+    /// [`detach_from_gl_context()`][Self::detach_from_gl_context()]. This new texture is bound to
+    /// the `GL_TEXTURE_EXTERNAL_OES` texture target.
+    ///
+    /// This can be used to access the [`SurfaceTexture`] image contents from multiple OpenGL ES
+    /// contexts. Note, however, that the image contents are only accessible from one OpenGL ES
+    /// context at a time.
+    pub fn attach_to_gl_context(&self, tex_name: u32) -> Result<()> {
+        let status = unsafe { ffi::ASurfaceTexture_attachToGLContext(self.ptr.as_ptr(), tex_name) };
+        status_to_io_result(status)
+    }
+
+    /// Detach the [`SurfaceTexture`] from the OpenGL ES context that owns the OpenGL ES texture
+    /// object.
+    ///
+    /// This call must be made with the OpenGL ES context current on the calling thread. The OpenGL
+    /// ES texture object will be deleted as a result of this call. After calling this method all
+    /// calls to [`update_tex_image()`][Self::update_tex_image()] will fail until a successful call
+    /// to [`attach_to_gl_context()`][Self::attach_to_gl_context()] is made.
+    ///
+    /// This can be used to access the [`SurfaceTexture`] image contents from multiple OpenGL ES
+    /// contexts. Note, however, that the image contents are only accessible from one OpenGL ES
+    /// context at a time.
+    pub fn detach_from_gl_context(&self) -> Result<()> {
+        let status = unsafe { ffi::ASurfaceTexture_detachFromGLContext(self.ptr.as_ptr()) };
+        status_to_io_result(status)
+    }
+
+    /// Retrieve the 4x4 texture coordinate transform matrix associated with the texture image set
+    /// by the most recent call to [`update_tex_image()`][Self::update_tex_image()].
+    ///
+    /// This transform matrix maps 2D homogeneous texture coordinates of the form `(s, t, 0, 1)`
+    /// with `s` and `t` in the inclusive range `[0, 1]` to the texture coordinate that should be
+    /// used to sample that location from the texture. Sampling the texture outside of the range of
+    /// this transform is undefined.
+    ///
+    /// The matrix is stored in column-major order so that it may be passed directly to OpenGL ES
+    /// via the [`glLoadMatrixf()`] or [`glUniformMatrix4fv()`] functions.
+    ///
+    /// [`glLoadMatrixf()`]: https://www.khronos.org/registry/OpenGL-Refpages/gl2.1/xhtml/glLoadMatrix.xml
+    /// [`gluniformmatrix4fv()`]: https://www.khronos.org/registry/OpenGL-Refpages/es3.1/html/glUniform.xhtml
+    pub fn transform_matrix(&self) -> [f32; 16] {
+        let mut r = [0f32; 16];
+        unsafe { ffi::ASurfaceTexture_getTransformMatrix(self.ptr.as_ptr(), r.as_mut_ptr()) };
+        r
+    }
+
+    /// Retrieve the timestamp associated with the texture image set by the most recent call to
+    /// [`update_tex_image()`][Self::update_tex_image()].
+    ///
+    /// This timestamp is in nanoseconds, and is normally monotonically increasing. The timestamp
+    /// should be unaffected by time-of-day adjustments, and for a camera should be strictly
+    /// monotonic but for a [`MediaPlayer`] may be reset when the position is set. The specific
+    /// meaning and zero point of the timestamp depends on the source providing images to the
+    /// [`SurfaceTexture`]. Unless otherwise specified by the image source, timestamps cannot
+    /// generally be compared across [`SurfaceTexture`] instances, or across multiple program
+    /// invocations. It is mostly useful for determining time offsets between subsequent frames.
+    ///
+    /// For EGL/Vulkan producers, this timestamp is the desired present time set with the
+    /// [`EGL_ANDROID_presentation_time`] or [`VK_GOOGLE_display_timing`] extensions.
+    ///
+    /// [`MediaPlayer`]: https://developer.android.com/reference/android/media/MediaPlayer
+    /// [`EGL_ANDROID_presentation_time`]: https://www.khronos.org/registry/EGL/extensions/ANDROID/EGL_ANDROID_presentation_time.txt
+    /// [`VK_GOOGLE_display_timing`]: https://www.khronos.org/registry/vulkan/specs/1.3-extensions/man/html/VK_GOOGLE_display_timing.html
+    pub fn timestamp(&self) -> Duration {
+        Duration::from_nanos(
+            unsafe { ffi::ASurfaceTexture_getTimestamp(self.ptr.as_ptr()) }
+                .try_into()
+                .unwrap(),
+        )
+    }
+
+    /// Update the texture image to the most recent frame from the image stream.
+    ///
+    /// This may only be called while the OpenGL ES context that owns the texture is current on the
+    /// calling thread. It will implicitly bind its texture to the `GL_TEXTURE_EXTERNAL_OES`
+    /// texture target.
+    pub fn update_tex_image(&self) -> Result<()> {
+        let status = unsafe { ffi::ASurfaceTexture_updateTexImage(self.ptr.as_ptr()) };
+        status_to_io_result(status)
+    }
+}

clients/android/native/vendor/ndk/src/sync.rs

@@ -0,0 +1,143 @@
+//! Bindings for [sync functions]
+//!
+//! [sync functions]: https://developer.android.com/ndk/reference/group/sync
+#![cfg(feature = "sync")]
+
+use std::{
+    ffi::CStr,
+    fmt::Debug,
+    // TODO: Import from std::os::fd::{} since Rust 1.66
+    os::unix::io::{AsRawFd, BorrowedFd, FromRawFd, OwnedFd},
+    ptr::NonNull,
+};
+
+#[doc(alias = "sync_file_info")]
+#[repr(transparent)]
+pub struct SyncFileInfo {
+    inner: NonNull<ffi::sync_file_info>,
+}
+
+impl Debug for SyncFileInfo {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("SyncFileInfo")
+            .field("name", &self.name())
+            .field("status", &self.status())
+            .field("flags", &self.flags())
+            .field("num_fences", &self.num_fences())
+            .field("fence_info", &self.fence_info())
+            .finish()
+    }
+}
+
+impl SyncFileInfo {
+    /// Retrieve detailed information about a sync file and its fences.
+    #[doc(alias = "sync_file_info")]
+    pub fn new(fd: BorrowedFd<'_>) -> Option<Self> {
+        let inner = NonNull::new(unsafe { ffi::sync_file_info(fd.as_raw_fd()) })?;
+        Some(Self { inner })
+    }
+
+    pub fn name(&self) -> &CStr {
+        let inner = unsafe { self.inner.as_ref() };
+        // TODO: Switch to CStr::from_bytes_until_nul (with c_char -> u8 transmute) since MSRV 1.69
+        // https://github.com/ash-rs/ash/pull/746
+        unsafe { CStr::from_ptr(inner.name.as_ptr()) }
+    }
+
+    pub fn status(&self) -> i32 {
+        let inner = unsafe { self.inner.as_ref() };
+        inner.status
+    }
+
+    pub fn flags(&self) -> u32 {
+        let inner = unsafe { self.inner.as_ref() };
+        inner.flags
+    }
+
+    pub fn num_fences(&self) -> usize {
+        let inner = unsafe { self.inner.as_ref() };
+        inner.num_fences as usize
+    }
+
+    /// Get the array of fence infos from the sync file's info.
+    #[doc(alias = "sync_get_fence_info")]
+    pub fn fence_info(&self) -> &[SyncFenceInfo] {
+        let inner = unsafe { self.inner.as_ref() };
+
+        if inner.num_fences == 0 {
+            &[]
+        } else {
+            let sync_fence_info = NonNull::new(inner.sync_fence_info as *mut _)
+                .expect("sync_fence_info cannot be null if num_fences > 0");
+            unsafe {
+                std::slice::from_raw_parts(sync_fence_info.as_ptr(), inner.num_fences as usize)
+            }
+        }
+    }
+}
+
+impl Drop for SyncFileInfo {
+    /// Free a [`struct@ffi::sync_file_info`] structure.
+    #[doc(alias = "sync_file_info_free")]
+    fn drop(&mut self) {
+        unsafe { ffi::sync_file_info_free(self.inner.as_ptr()) }
+    }
+}
+
+#[doc(alias = "sync_fence_info")]
+#[repr(transparent)]
+pub struct SyncFenceInfo(ffi::sync_fence_info);
+
+impl Debug for SyncFenceInfo {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.debug_struct("SyncFenceInfo")
+            .field("obj_name", &self.obj_name())
+            .field("driver_name", &self.driver_name())
+            .field("status", &self.status())
+            .field("flags", &self.flags())
+            .field("timestamp_ns", &self.timestamp_ns())
+            .finish()
+    }
+}
+
+impl SyncFenceInfo {
+    pub fn obj_name(&self) -> &CStr {
+        // TODO: Switch to CStr::from_bytes_until_nul (with c_char -> u8 transmute) since MSRV 1.69
+        unsafe { CStr::from_ptr(self.0.obj_name.as_ptr()) }
+    }
+
+    pub fn driver_name(&self) -> &CStr {
+        // TODO: Switch to CStr::from_bytes_until_nul (with c_char -> u8 transmute) since MSRV 1.69
+        unsafe { CStr::from_ptr(self.0.driver_name.as_ptr()) }
+    }
+
+    pub fn status(&self) -> i32 {
+        self.0.status
+    }
+
+    pub fn flags(&self) -> u32 {
+        self.0.flags
+    }
+
+    pub fn timestamp_ns(&self) -> u64 {
+        self.0.timestamp_ns
+    }
+}
+
+/// Merge two sync files.
+///
+/// This produces a new sync file with the given name which has the union of the two original sync
+/// file's fences; redundant fences may be removed.
+///
+/// If one of the input sync files is signaled or invalid, then this function may behave like
+/// `dup()`: the new file descriptor refers to the valid/unsignaled sync file with its original
+/// name, rather than a new sync file.
+pub fn sync_merge(name: &CStr, fd1: BorrowedFd<'_>, fd2: BorrowedFd<'_>) -> OwnedFd {
+    unsafe {
+        OwnedFd::from_raw_fd(ffi::sync_merge(
+            name.as_ptr(),
+            fd1.as_raw_fd(),
+            fd2.as_raw_fd(),
+        ))
+    }
+}

clients/android/native/vendor/ndk/src/trace.rs

@@ -0,0 +1,92 @@
+//! Bindings for the NDK tracing API.
+//!
+//! See also [the NDK docs](https://developer.android.com/ndk/reference/group/tracing)
+#![cfg(feature = "api-level-23")]
+use std::ffi::{CString, NulError};
+use std::marker::PhantomData;
+
+pub fn is_trace_enabled() -> bool {
+    unsafe { ffi::ATrace_isEnabled() }
+}
+
+#[derive(Debug)]
+pub struct Section {
+    // Section is !Sync and !Send
+    _pd: PhantomData<*mut ()>,
+}
+
+impl Section {
+    pub fn new(name: &str) -> Result<Self, NulError> {
+        let section_name = CString::new(name)?;
+        unsafe { ffi::ATrace_beginSection(section_name.as_ptr()) };
+
+        Ok(Self { _pd: PhantomData })
+    }
+
+    pub fn end(self) {
+        drop(self)
+    }
+}
+
+impl Drop for Section {
+    fn drop(&mut self) {
+        unsafe { ffi::ATrace_endSection() };
+    }
+}
+
+/// Unique identifier for distinguishing simultaneous events
+#[derive(Debug)]
+#[cfg(feature = "api-level-29")]
+pub struct Cookie(pub i32);
+
+#[derive(Debug)]
+#[cfg(feature = "api-level-29")]
+pub struct AsyncSection {
+    section_name: CString,
+    cookie: Cookie,
+    // AsyncSection is !Sync
+    _pd: PhantomData<&'static ()>,
+}
+
+#[cfg(feature = "api-level-29")]
+impl AsyncSection {
+    pub fn new(name: &str, cookie: Cookie) -> Result<Self, NulError> {
+        let section_name = CString::new(name)?;
+        unsafe { ffi::ATrace_beginAsyncSection(section_name.as_ptr(), cookie.0) };
+
+        Ok(Self {
+            section_name,
+            cookie,
+            _pd: PhantomData,
+        })
+    }
+
+    pub fn end(self) {
+        drop(self)
+    }
+}
+
+#[cfg(feature = "api-level-29")]
+impl Drop for AsyncSection {
+    fn drop(&mut self) {
+        unsafe { ffi::ATrace_endAsyncSection(self.section_name.as_ptr(), self.cookie.0) };
+    }
+}
+
+#[cfg(feature = "api-level-29")]
+#[derive(Debug)]
+pub struct Counter {
+    name: CString,
+}
+
+#[cfg(feature = "api-level-29")]
+impl Counter {
+    pub fn new(name: &str) -> Result<Self, NulError> {
+        let name = CString::new(name)?;
+        Ok(Self { name })
+    }
+
+    pub fn set_value(&self, value: i64) {
+        unsafe { ffi::ATrace_setCounter(self.name.as_ptr(), value) }
+    }
+}

clients/android/native/vendor/ndk/src/utils.rs

@@ -0,0 +1,70 @@
+//! Internal utilities
+use log::{error, log_enabled, Level};
+use std::ffi::{c_int, CStr, CString};
+use std::io::{Error, Result};
+
+/// Turns standard `<errno.h>` status codes - typically rewrapped by Android's [`Errors.h`] - into
+/// Rust's [`std::io::Error`].
+///
+/// [`Errors.h`]: https://cs.android.com/android/platform/superproject/+/master:system/core/libutils/include/utils/Errors.h
+pub(crate) fn status_to_io_result(status: i32) -> Result<()> {
+    match status {
+        0 => Ok(()),
+        r if r < 0 => Err(Error::from_raw_os_error(-r)),
+        r => unreachable!("Status is positive integer {}", r),
+    }
+}
+
+pub(crate) fn android_log(level: Level, tag: &CStr, msg: &CStr) {
+    let prio = match level {
+        Level::Error => ffi::android_LogPriority::ANDROID_LOG_ERROR,
+        Level::Warn => ffi::android_LogPriority::ANDROID_LOG_WARN,
+        Level::Info => ffi::android_LogPriority::ANDROID_LOG_INFO,
+        Level::Debug => ffi::android_LogPriority::ANDROID_LOG_DEBUG,
+        Level::Trace => ffi::android_LogPriority::ANDROID_LOG_VERBOSE,
+    };
+    unsafe {
+        ffi::__android_log_write(prio.0 as c_int, tag.as_ptr(), msg.as_ptr());
+    }
+}
+
+pub(crate) fn log_panic(panic: Box<dyn std::any::Any + Send>) {
+    fn log_panic(panic_str: &str) {
+        const RUST_PANIC_TAG: &CStr =
+            unsafe { CStr::from_bytes_with_nul_unchecked(b"RustPanic\0") };
+
+        let panic_str = CString::new(panic_str).unwrap_or_default();
+
+        // Use the Rust logger if installed and enabled, otherwise fall back to the Android system
+        // logger so there is at least some record of the panic
+        if log_enabled!(Level::Error) {
+            error!("RustPanic: {}", panic_str.to_string_lossy());
+            log::logger().flush();
+        } else {
+            android_log(Level::Error, RUST_PANIC_TAG, &panic_str);
+        }
+    }
+
+    match panic.downcast::<String>() {
+        Ok(panic_string) => log_panic(&panic_string),
+        Err(panic) => match panic.downcast::<&str>() {
+            Ok(panic_str) => log_panic(&panic_str),
+            Err(_) => log_panic("Unknown panic message type"),
+        },
+    }
+}
+
+/// Run a closure and abort the program if it panics.
+///
+/// This is generally used to ensure Rust callbacks won't unwind past the FFI boundary, which leads
+/// to undefined behaviour.
+pub(crate) fn abort_on_panic<R>(f: impl FnOnce() -> R) -> R {
+    std::panic::catch_unwind(std::panic::AssertUnwindSafe(f)).unwrap_or_else(|panic| {
+        // Try logging the panic before aborting
+        //
+        // Just in case our attempt to log a panic could itself cause a panic we use a
+        // second catch_unwind here.
+        let _ = std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| log_panic(panic)));
+        std::process::abort();
+    })
+}

clients/apple/Punktfunk.xcodeproj/project.pbxproj

@@ -366,7 +366,8 @@
 				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
 				INFOPLIST_KEY_GCSupportsControllerUserInteraction = YES;
-				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_GCSupportsGameMode = YES;
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_NSMicrophoneUsageDescription = "Your microphone is streamed to the connected punktfunk host, where it appears as a virtual microphone.";
@@ -401,7 +402,8 @@
 				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
 				INFOPLIST_KEY_GCSupportsControllerUserInteraction = YES;
-				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_GCSupportsGameMode = YES;
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSHumanReadableCopyright = "";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_NSMicrophoneUsageDescription = "Your microphone is streamed to the connected punktfunk host, where it appears as a virtual microphone.";
@@ -433,7 +435,8 @@
 				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
 				INFOPLIST_KEY_GCSupportsControllerUserInteraction = YES;
-				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_GCSupportsGameMode = YES;
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_NSMicrophoneUsageDescription = "Your microphone is streamed to the connected punktfunk host, where it appears as a virtual microphone.";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
@@ -473,7 +476,8 @@
 				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
 				INFOPLIST_KEY_GCSupportsControllerUserInteraction = YES;
-				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_GCSupportsGameMode = YES;
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_NSMicrophoneUsageDescription = "Your microphone is streamed to the connected punktfunk host, where it appears as a virtual microphone.";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
@@ -511,7 +515,7 @@
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
-				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
 				LD_RUNPATH_SEARCH_PATHS = (
@@ -541,7 +545,7 @@
 				GENERATE_INFOPLIST_FILE = YES;
 				INFOPLIST_FILE = Config/Info.plist;
 				INFOPLIST_KEY_CFBundleDisplayName = Punktfunk;
-				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.utilities";
+				INFOPLIST_KEY_LSApplicationCategoryType = "public.app-category.games";
 				INFOPLIST_KEY_NSLocalNetworkUsageDescription = "Punktfunk connects directly to your punktfunk host on the local network to stream video, audio, and input.";
 				INFOPLIST_KEY_UIApplicationSceneManifest_Generation = YES;
 				LD_RUNPATH_SEARCH_PATHS = (

clients/apple/README.md

@@ -10,7 +10,8 @@ Opus audio, cert pinning — lives in the shared Rust **`punktfunk-core`** (stat
 
 ## Features
 
-- **Hardware decode** — VideoToolbox HEVC, with a low-latency **stage-2 presenter**
+- **Hardware decode** — VideoToolbox H.264/HEVC (plus **AV1** on devices with an AV1 hardware
+  decoder — M3-class Macs, A17 Pro-class iPhones), with a low-latency **stage-2 presenter**
   (`VTDecompressionSession` → `CAMetalLayer`, presented off a `CADisplayLink`, ~11 ms p50) as the
   default and an `AVSampleBufferDisplayLayer` fallback.
 - **HDR & 4:4:4** — PQ passthrough with a correct reference-white anchor, mid-session SDR↔HDR
@@ -22,8 +23,9 @@ Opus audio, cert pinning — lives in the shared Rust **`punktfunk-core`** (stat
 - **Full controller support** — one selected controller forwarded as pad 0, including **DualSense**
   feedback (rumble → CoreHaptics, lightbar, player LEDs, adaptive triggers) and touchpad/motion. The
   virtual pad type auto-resolves from your physical controller.
-- **Mouse & keyboard** — `GCMouse`/`GCKeyboard` capture with click-to-capture and a ⌘⎋ release, plus
+- **Mouse & keyboard** — `GCMouse`/`GCKeyboard` capture with click-to-capture and a ⌃⌥⇧Q release
-  iPad pointer lock and touch input.
+  (the cross-client Ctrl+Alt+Shift+Q; ⌘⎋ still works as the macOS/iPad toggle), plus iPad pointer
+  lock and touch input.
 - **Find hosts automatically** — mDNS discovery (`NWBrowser` over `_punktfunk._udp`); first connect
   does a one-time **SPAKE2 PIN pairing** (or TOFU on trusted LANs), then reconnects on a pinned,
   Keychain-stored identity.
@@ -83,7 +85,9 @@ PUNKTFUNK_AUTOCONNECT=<box-ip> PUNKTFUNK_MODE=1280x720x60 swift run PunktfunkCli
 - **`PunktfunkClient`** (the app) — hosts grid with an *On this network* section, add-host sheet,
   the two trust flows (TOFU prompt + SPAKE2 `PairSheet`), the stream view with the HUD, a
   tabbed Settings pane (General / Display / Audio / Controllers / Advanced), and the network speed
-  test. A Scene-level **Stream** menu carries Disconnect (⌘D) and the HUD toggle (⌘⇧S).
+  test. A Scene-level **Stream** menu carries the cross-client shortcut set: Release Mouse (⌃⌥⇧Q),
+  Disconnect (⌃⌥⇧D) and the HUD toggle (⌃⌥⇧S) — the same Ctrl+Alt+Shift combos the Windows and
+  Linux clients reserve, also shown on a 6-second banner at stream start.
   On iOS/iPadOS **and macOS** a connected controller swaps the whole home for the **gamepad UI**
   (`Home/Gamepad*`, `Settings/GamepadSettingsView`): a console-style host carousel (A connect · Y
   library · X settings), a controller-navigable settings screen, an add-host flow with an

clients/apple/Sources/PunktfunkClient/ContentView.swift

@@ -55,6 +55,18 @@ struct ContentView: View {
     /// Wakes a sleeping host and waits for it to come back online before connecting (drives the
     /// "Waking…" overlay). macOS-only in practice — WoL is gated off on iOS/tvOS.
     @StateObject private var waker = HostWaker()
+    #if os(macOS)
+    /// Whether the hosting window is native-fullscreen right now (reported by
+    /// FullscreenController). Drives the session view's safe-area choice: fullscreen goes
+    /// edge-to-edge (behind the notch); windowed respects the top inset so the title bar
+    /// never covers the video.
+    @State private var isFullscreen = false
+    /// Shows the start-of-stream shortcut banner (the Windows client's discoverability
+    /// pattern): raised on every transition to `.streaming`, dropped by the banner's own
+    /// 6-second task. Independent of the stats HUD so the keys are discoverable even with
+    /// statistics off.
+    @State private var showShortcutHint = false
+    #endif
     #if !os(macOS)
     @State private var showSettings = false
     #endif
@@ -89,6 +101,9 @@ struct ContentView: View {
         .onChange(of: model.phase) { _, phase in
             switch phase {
             case .streaming:
+                #if os(macOS)
+                showShortcutHint = true // the 6 s shortcut banner, per session start
+                #endif
                 // A session actually started — remember it on the card ("Connected … ago"
                 // plus the accent ring on the most recent host).
                 guard let host = model.activeHost else { break }
@@ -115,7 +130,7 @@ struct ContentView: View {
             }
         }
         .onDisappear { model.disconnect() } // window closed mid-session (Cmd+N spawns more)
-        // Expose the session to the Scene-level Stream menu (Disconnect ⌘D works even when
+        // Expose the session to the Scene-level Stream menu (Disconnect ⌃⌥⇧D works even when
         // the HUD is hidden). tvOS has no such menu.
         #if !os(tvOS)
         .focusedSceneValue(\.sessionFocus, SessionFocus(
@@ -125,7 +140,12 @@ struct ContentView: View {
         #if os(macOS)
         // Fullscreen only while a session is up (incl. the trust prompt over the blurred stream),
         // windowed on the host list — so the picker isn't forced fullscreen. Opt-out in Settings.
-        .background(FullscreenController(active: fullscreenWhileStreaming && model.connection != nil))
+        // The controller also reports the window's ACTUAL fullscreen state back into
+        // `isFullscreen` (the user can toggle it manually), which drives the session view's
+        // safe-area handling below.
+        .background(FullscreenController(
+            active: fullscreenWhileStreaming && model.connection != nil,
+            isFullscreen: $isFullscreen))
         #endif
         // On the outer Group so the sheet survives the trust-prompt → home transition
         // (the "Pair with PIN instead" path disconnects first — the host's accept loop
@@ -188,7 +208,21 @@ struct ContentView: View {
         .alert(
             "Connection failed",
             isPresented: Binding(
-                get: { model.errorMessage != nil },
+                get: {
+                    guard model.errorMessage != nil else { return false }
+                    #if os(macOS)
+                    // Defer the alert while a forced-fullscreen exit is still pending: a sheet
+                    // attached to a fullscreen window makes AppKit drop `-toggleFullScreen:`, so
+                    // presenting it now strands the window fullscreen on the home screen after a
+                    // session error (a deliberate disconnect sets no `errorMessage`, which is why
+                    // it never stuck). Tearing the session down already flipped `active`→false;
+                    // once the window leaves fullscreen and `isFullscreen` flips, the alert shows
+                    // over the windowed home UI. Not gated when fullscreen is the user's own manual
+                    // choice (opt-out setting) — nothing is auto-exiting there to conflict with.
+                    if fullscreenWhileStreaming && isFullscreen { return false }
+                    #endif
+                    return true
+                },
                 set: { if !$0 { model.errorMessage = nil } })
         ) {
             Button("OK", role: .cancel) {}
@@ -300,13 +334,17 @@ struct ContentView: View {
         #if os(macOS)
         .frame(minWidth: 640, minHeight: 360)
         .background(Color.black)
-        // Fill the whole display in fullscreen, INCLUDING behind the camera housing (notch).
+        // FULLSCREEN fills the whole display, INCLUDING behind the camera housing (notch).
         // Without this the stream is laid out in the safe area below the notch, so an
         // aspect-fit video at the display's native mode scales down and leaves black borders.
         // A fullscreen video behind the notch (a thin top-center strip occluded) is the
-        // expected behavior — same edge-to-edge intent as the iOS/tvOS branches below. Inert
+        // expected behavior — same edge-to-edge intent as the iOS/tvOS branches below.
-        // in windowed mode (no notch safe-area inset on a titled window).
+        // WINDOWED keeps the TOP inset: macOS 26 windows extend content under the (glass)
-        .ignoresSafeArea()
+        // title bar and report its height as top safe area — ignoring it there put the top of
+        // the video (and the HUD) underneath the title bar. The black `.background` above is a
+        // ShapeStyle background, which always extends under every inset, so the strip behind
+        // the title bar stays black rather than showing the video.
+        .ignoresSafeArea(edges: isFullscreen ? .all : [.horizontal, .bottom])
         #elseif os(iOS)
         // Streaming is immersive: edge-to-edge under the status bar and home
         // indicator, both hidden for the session (they return with the hosts grid).
@@ -335,6 +373,9 @@ struct ContentView: View {
                     onCaptureChange: { [weak model] captured in
                         model?.mouseCaptured = captured
                     },
+                    onDisconnectRequest: { [weak model] in
+                        model?.disconnect() // the captured-state ⌃⌥⇧D combo
+                    },
                     onFrame: { [meter = model.meter, latency = model.latency,
                                 split = model.latencySplit, offset = conn.clockOffsetNs] au in
                         meter.note(byteCount: au.data.count)
@@ -356,6 +397,30 @@ struct ContentView: View {
                         StreamHUDView(model: model, connection: conn, placement: placement)
                     }
                 }
+                #if os(macOS)
+                // The start-of-stream shortcut banner (Windows-client parity): the full
+                // reserved key set on a glass pill, bottom-centre, for the first 6 seconds of
+                // every session — independent of the stats HUD, so the keys are discoverable
+                // even with statistics off. The banner's own task drops it (cancelled cleanly
+                // if the session view goes away first).
+                .overlay(alignment: .bottom) {
+                    if captureEnabled && showShortcutHint {
+                        Text("Click the stream to capture · ⌃⌥⇧Q releases the mouse · "
+                            + "⌃⌥⇧D disconnects · ⌃⌥⇧S stats")
+                            .font(.geist(12, relativeTo: .caption))
+                            .foregroundStyle(.secondary)
+                            .padding(.horizontal, 14)
+                            .padding(.vertical, 8)
+                            .glassBackground(Capsule())
+                            .padding(.bottom, 24)
+                            .transition(.opacity)
+                            .task {
+                                try? await Task.sleep(for: .seconds(6))
+                                withAnimation(.easeOut(duration: 0.6)) { showShortcutHint = false }
+                            }
+                    }
+                }
+                #endif
                 #if os(iOS)
                 // Touch users have no menu / ⌘D, so when the HUD (and its Disconnect button)
                 // is hidden, keep a minimal always-reachable exit in a corner. It rides a
@@ -422,14 +487,24 @@ struct ContentView: View {
                 host, launchID: launchID, allowTofu: allowTofu,
                 requestAccess: requestAccess, approvalReq: approvalReq)
         }
-        // Asleep (not advertising) and we can wake it? Fire the magic packet and WAIT for it to come
+        // Not advertising and we can wake it? DIAL FIRST anyway — no mDNS advert does NOT mean
-        // back online — a cold box takes far longer to boot than a connect will sit — showing the
+        // unreachable: a host reached over a routed network (Tailscale/VPN/another subnet) is
-        // "Waking…" overlay meanwhile. Then connect. Otherwise dial straight away.
+        // mDNS-blind forever, and gating the dial on presence bricked exactly those reconnects
+        // (the host log shows no connection attempt at all; the tile pip and this gate share the
+        // LAN-only `advertises` predicate). `prepareWake` inside the dial already fires the magic
+        // packet up front, so a genuinely-asleep host is waking while the connect times out; only
+        // when that dial FAILS do we fall into the visible "Waking…" wait — a cold box takes far
+        // longer to boot than a connect will sit — and redial once it's back on mDNS.
         if PunktfunkConnection.wakeOnLANAvailable, !host.wakeMacs.isEmpty, !discovery.advertises(host) {
-            discovery.start() // so we can observe it reappear
+            discovery.start() // so the wake-wait can observe it reappear
+            startSessionDirect(
+                host, launchID: launchID, allowTofu: allowTofu,
+                requestAccess: requestAccess, approvalReq: approvalReq,
+                onUnreachable: {
                     waker.start(
                         host: host, connectsAfter: true, macs: host.wakeMacs, lastIP: host.address,
                         isOnline: { discovery.advertises(host) }, onOnline: go)
+                })
         } else {
             go()
         }
@@ -437,10 +512,12 @@ struct ContentView: View {
 
     /// The actual dial — reached directly when the host is awake, or from the waker once a woken
     /// host is back online. `prepareWake` still runs here to LEARN/refresh the MAC now that the host
-    /// is advertising (and is a harmless no-op otherwise).
+    /// is advertising (and is a harmless no-op otherwise). `onUnreachable` hands a plain connect
+    /// failure back to the caller (the wake-wait fallback) instead of the error alert.
     private func startSessionDirect(
         _ host: StoredHost, launchID: String? = nil,
-        allowTofu: Bool, requestAccess: Bool = false, approvalReq: ApprovalRequest? = nil
+        allowTofu: Bool, requestAccess: Bool = false, approvalReq: ApprovalRequest? = nil,
+        onUnreachable: (@MainActor () -> Void)? = nil
     ) {
         prepareWake(for: host)
         // The delegated-approval wait prompt only makes sense once we're actually dialing — set it
@@ -461,7 +538,8 @@ struct ContentView: View {
             preferredCodec: preferredCodecByte,
             launchID: launchID,
             allowTofu: allowTofu,
-            requestAccess: requestAccess)
+            requestAccess: requestAccess,
+            onUnreachable: onUnreachable)
     }
 
     /// Learn-while-awake, wake-while-asleep — run just before every connect:
@@ -641,23 +719,62 @@ struct ContentView: View {
 }
 
 #if os(macOS)
-/// Drives the hosting window in/out of native fullscreen from SwiftUI state. Mounted invisibly in
+/// Drives the hosting window in/out of native fullscreen from SwiftUI state, and mirrors the
-/// the view tree; on each `active` change it captures the window and toggles fullscreen only when
+/// window's ACTUAL fullscreen state back into `isFullscreen` (the user can also toggle it with the
-/// the current state differs (so it never fights a toggle already in flight, and never touches a
+/// green button / ⌃⌘F — ContentView keys the session view's safe-area handling off the real state,
-/// window the user fullscreened manually unless `active` says otherwise).
+/// not the setting). Mounted invisibly in the view tree; on each `active` change it captures the
+/// window and toggles fullscreen only when the current state differs (so it never fights a toggle
+/// already in flight, and never touches a window the user fullscreened manually unless `active`
+/// says otherwise).
 private struct FullscreenController: NSViewRepresentable {
     let active: Bool
+    @Binding var isFullscreen: Bool
+
+    /// Holds the window's fullscreen-transition observers so they're rebound on a window change
+    /// and removed on dismantle.
+    final class Coordinator {
+        var observers: [NSObjectProtocol] = []
+        weak var observedWindow: NSWindow?
+        deinit { observers.forEach(NotificationCenter.default.removeObserver(_:)) }
+    }
+
+    func makeCoordinator() -> Coordinator { Coordinator() }
 
     func makeNSView(context: Context) -> NSView { NSView() }
 
     func updateNSView(_ view: NSView, context: Context) {
         let want = active
+        let isFullscreen = $isFullscreen
+        let coordinator = context.coordinator
         DispatchQueue.main.async {
             guard let window = view.window else { return }
+            observeTransitions(of: window, coordinator: coordinator)
             let isFull = window.styleMask.contains(.fullScreen)
+            if isFullscreen.wrappedValue != isFull { isFullscreen.wrappedValue = isFull }
             if want != isFull { window.toggleFullScreen(nil) }
         }
     }
+
+    /// `willEnter` (not did) so the video goes edge-to-edge while the title bar is already
+    /// animating away; `didExit` so the top inset returns only once the title bar is back —
+    /// no black gap in either direction.
+    private func observeTransitions(of window: NSWindow, coordinator: Coordinator) {
+        guard coordinator.observedWindow !== window else { return }
+        coordinator.observers.forEach(NotificationCenter.default.removeObserver(_:))
+        coordinator.observers.removeAll()
+        coordinator.observedWindow = window
+        let isFullscreen = $isFullscreen
+        for (name, value) in [
+            (NSWindow.willEnterFullScreenNotification, true),
+            (NSWindow.didExitFullScreenNotification, false),
+        ] {
+            coordinator.observers.append(NotificationCenter.default.addObserver(
+                forName: name, object: window, queue: .main
+            ) { _ in
+                isFullscreen.wrappedValue = value
+            })
+        }
+    }
 }
 #endif
 

clients/apple/Sources/PunktfunkClient/Home/GamepadHomeView.swift

@@ -96,6 +96,14 @@ struct GamepadHomeView: View {
         .background { GamepadScreenBackground() }
         .onAppear { discovery.start() }
         .onDisappear { discovery.stop() }
+        // Reachability sweep (mDNS-independent) so routed/VPN hosts that never advertise still show
+        // Online — the console mirror of HomeView's `.task`; cancelled on disappear.
+        .task {
+            while !Task.isCancelled {
+                await store.refreshReachability(discovery: discovery)
+                try? await Task.sleep(for: .seconds(10))
+            }
+        }
         // The settings / add-host screens take over the controller (the carousel's `isActive`
         // gate above). iOS presents them full screen — the immersive console feel; macOS has no
         // fullScreenCover, so they become generously sized sheets over the dimmed launcher.
@@ -218,13 +226,16 @@ struct GamepadHomeView: View {
                 id: .saved(host.id),
                 title: host.displayName,
                 subtitle: "\(host.address):\(String(host.port))",
-                isOnline: discovery.advertises(host),
+                // Online = advertising on mDNS OR proven reachable by the probe (a routed/VPN host
+                // never advertises); the wake item is offered only when neither holds.
+                isOnline: discovery.advertises(host) || store.probedOnline.contains(host.id),
                 isPaired: host.pinnedSHA256 != nil,
                 isConnecting: model.phase == .connecting && model.activeHost?.id == host.id,
                 filled: true,
                 hasLibrary: true,
                 canWake: PunktfunkConnection.wakeOnLANAvailable
-                    && !discovery.advertises(host) && !host.wakeMacs.isEmpty,
+                    && !discovery.advertises(host) && !store.probedOnline.contains(host.id)
+                    && !host.wakeMacs.isEmpty,
                 activate: { connect(host) })
         }
         let discovered = discovery.unsaved(among: store.hosts).map { d in

clients/apple/Sources/PunktfunkClient/Home/HomeView.swift

@@ -76,6 +76,17 @@ struct HomeView: View {
             // session. The home appears/disappears as the stream swaps in and out.
             .onAppear { discovery.start() }
             .onDisappear { discovery.stop() }
+            // Reachability sweep while the grid is up: a saved host reached only over a routed
+            // network (Tailscale/VPN) never advertises on mDNS, so `advertises` can't see it. Probe
+            // every non-advertising saved host ~every 10 s and publish the reachable set for the
+            // pips (`isOnline` above OR's it in). The `.task` is cancelled on disappear, matching
+            // `discovery.stop()`.
+            .task {
+                while !Task.isCancelled {
+                    await store.refreshReachability(discovery: discovery)
+                    try? await Task.sleep(for: .seconds(10))
+                }
+            }
             #if os(tvOS)
             // Pushed routes — the Settings-app navigation feel (push animation, Menu
             // pops) instead of modal overlays.
@@ -157,7 +168,7 @@ struct HomeView: View {
         let onBrowseLibrary: (() -> Void)? = libraryEnabled ? { libraryTarget = host } : nil
         return HostCardView(
             host: host,
-            isOnline: discovery.advertises(host),
+            isOnline: discovery.advertises(host) || store.probedOnline.contains(host.id),
             isConnecting: model.phase == .connecting && model.activeHost?.id == host.id,
             isMostRecent: host.id == mostRecentHostID,
             isBusy: model.isBusy,

clients/apple/Sources/PunktfunkClient/PunktfunkClientApp.swift

@@ -43,8 +43,9 @@ struct PunktfunkClientApp: App {
             // form row labels; views that pick an explicit size/weight use `.geist(…)` directly.
             .font(.geist(17, relativeTo: .body))
         }
-        // The Stream menu (Disconnect ⌘D, Show/Hide Statistics ⌘⇧S) — a real menu bar on
+        // The Stream menu (Release Mouse ⌃⌥⇧Q, Disconnect ⌃⌥⇧D, Show/Hide Statistics ⌃⌥⇧S —
-        // macOS, hardware-keyboard shortcuts on iPad. tvOS has neither.
+        // the cross-client Ctrl+Alt+Shift set) — a real menu bar on macOS, hardware-keyboard
+        // shortcuts on iPad. tvOS has neither.
         #if !os(tvOS)
         .commands { StreamCommands() }
         #endif

clients/apple/Sources/PunktfunkClient/Session/SessionModel.swift

@@ -135,6 +135,10 @@ final class SessionModel: ObservableObject {
     /// successful connect streams directly (the approval IS the trust decision) — the caller pins
     /// the observed fingerprint as paired. `host.pinnedSHA256`, when set, pins the advertised cert
     /// for the wait; nil = trust-on-first-use.
+    /// `onUnreachable`, when set, replaces the "could not connect" alert for a plain connect
+    /// failure: the caller takes over recovery (the Wake-on-LAN wait for a host that stopped
+    /// advertising). It never fires for the delegated-approval path, whose failure text carries
+    /// its own instructions.
     func connect(to host: StoredHost, width: UInt32, height: UInt32, hz: UInt32,
                  compositor: PunktfunkConnection.Compositor = .auto,
                  gamepad: PunktfunkConnection.GamepadType = .auto,
@@ -145,7 +149,8 @@ final class SessionModel: ObservableObject {
                  launchID: String? = nil,
                  allowTofu: Bool = false,
                  autoTrust: Bool = false,
-                 requestAccess: Bool = false) {
+                 requestAccess: Bool = false,
+                 onUnreachable: (@MainActor () -> Void)? = nil) {
         guard phase == .idle else { return }
         phase = .connecting
         activeHost = host
@@ -189,10 +194,13 @@ final class SessionModel: ObservableObject {
             if want444, canDecode444 {
                 videoCaps |= PunktfunkConnection.videoCap444
             }
-            // This client's VideoToolbox path decodes H.264 and HEVC (AV1 isn't wired — hosts don't
+            // This client's VideoToolbox path decodes H.264 and HEVC everywhere, and AV1 when
-            // emit it on the native path yet). The host resolves the emitted codec from these + the
+            // this device has an AV1 hardware decoder (M3-class Macs, A17 Pro-class iPhones —
-            // soft `preferredCodec`; `resolvedCodec` reflects what it chose.
+            // VideoToolbox has no software AV1 decoder, so advertising it elsewhere would invite
-            let videoCodecs = PunktfunkConnection.codecH264 | PunktfunkConnection.codecHEVC
+            // a stream that can't decode; see AV1.swift). The host resolves the emitted codec
+            // from these + the soft `preferredCodec`; `resolvedCodec` reflects what it chose.
+            var videoCodecs = PunktfunkConnection.codecH264 | PunktfunkConnection.codecHEVC
+            if AV1.hardwareDecodeSupported { videoCodecs |= PunktfunkConnection.codecAV1 }
             let result = Result { try PunktfunkConnection(
                 host: host.address, port: host.port,
                 width: width, height: height, refreshHz: hz,
@@ -241,7 +249,11 @@ final class SessionModel: ObservableObject {
                 case .failure:
                     self.phase = .idle
                     self.activeHost = nil
-                    if requestAccess {
+                    if let onUnreachable, !requestAccess {
+                        // The caller owns recovery (wake-and-retry) — no error alert here; its
+                        // own overlay explains what's happening.
+                        onUnreachable()
+                    } else if requestAccess {
                         // The delegated-approval connect ended without being admitted: the
                         // operator didn't approve it before the host's park window elapsed (or
                         // the host was unreachable).

clients/apple/Sources/PunktfunkClient/Session/StreamCommands.swift

@@ -1,6 +1,11 @@
 // The app's "Stream" menu (macOS menu bar + iPad hardware-keyboard shortcuts). These live at
-// the Scene level so they keep working when the HUD overlay is hidden — in particular ⌘D
+// the Scene level so they keep working when the HUD overlay is hidden. The shortcuts are the
-// disconnect, which used to be reachable only via the HUD's button. The toggle just flips the
+// CROSS-CLIENT set every punktfunk client reserves — Ctrl+Alt+Shift+Q (release the captured
+// mouse) / +D (disconnect) / +S (stats) — and the menu is their discoverable surface on macOS
+// (the Linux client has its GTK Shortcuts window, Windows its start-of-stream banner). While
+// input is CAPTURED these key equivalents never reach the menu (the stream view swallows
+// keys); InputCapture's monitor detects the same combos there and performs the same actions —
+// the menu covers the released state and discoverability. The stats toggle just flips the
 // shared `hudEnabled` setting; ContentView reads the same @AppStorage and reacts.
 //
 // tvOS has no menu bar / hardware-keyboard command surface (disconnect there is the Siri
@@ -38,10 +43,19 @@ struct StreamCommands: Commands {
             Button(hudEnabled ? "Hide Statistics" : "Show Statistics") {
                 hudEnabled.toggle()
             }
-            .keyboardShortcut("s", modifiers: [.command, .shift])
+            .keyboardShortcut("s", modifiers: [.control, .option, .shift])
+            // Reaches the key window's stream view via NotificationCenter — capture is view
+            // state the Scene can't touch directly. (Captured, the combo is handled by
+            // InputCapture's monitor before menus see it; this item is the released-state
+            // path and the shortcut's menu-bar documentation.)
+            Button("Release Mouse") {
+                NotificationCenter.default.post(name: .punktfunkReleaseCapture, object: nil)
+            }
+            .keyboardShortcut("q", modifiers: [.control, .option, .shift])
+            .disabled(session?.isStreaming != true)
             Divider()
             Button("Disconnect") { session?.disconnect() }
-                .keyboardShortcut("d", modifiers: .command)
+                .keyboardShortcut("d", modifiers: [.control, .option, .shift])
                 .disabled(session?.isStreaming != true)
         }
     }

clients/apple/Sources/PunktfunkClient/Session/StreamHUDView.swift

@@ -64,10 +64,11 @@ struct StreamHUDView: View {
                     .foregroundStyle(.secondary)
             }
             // While captured the cursor is hidden+frozen, so the button is keyboard-only
-            // (⌘⎋ or Cmd+Tab release the cursor; released, it's clickable again).
+            // (⌃⌥⇧Q — the cross-client Ctrl+Alt+Shift+Q — or ⌘⎋/Cmd+Tab release the cursor;
+            // released, it's clickable again).
             #if os(macOS)
             Text(model.mouseCaptured
-                ? "⌘⎋ releases the mouse"
+                ? "⌃⌥⇧Q releases the mouse"
                 : "Click the stream to capture input")
                 .font(.geist(11, relativeTo: .caption2))
                 .foregroundStyle(.secondary)
@@ -87,10 +88,16 @@ struct StreamHUDView: View {
                 .font(.geist(12, relativeTo: .caption))
                 .foregroundStyle(.secondary)
             #else
-            // ⌘D lives on the app's Stream menu (so it still works when the HUD is hidden);
+            // ⌃⌥⇧D lives on the app's Stream menu (so it still works when the HUD is hidden)
-            // this button is the in-overlay, click-to-disconnect affordance.
+            // and in InputCapture's monitor while captured; this button is the in-overlay,
-            Button("Disconnect (⌘D)") { model.disconnect() }
+            // click-to-disconnect affordance.
+            #if os(macOS)
+            Button("Disconnect (⌃⌥⇧D)") { model.disconnect() }
                 .font(.geist(12, relativeTo: .caption))
+            #else
+            Button("Disconnect") { model.disconnect() }
+                .font(.geist(12, relativeTo: .caption))
+            #endif
             #endif
         }
         .padding(10)

clients/apple/Sources/PunktfunkClient/Settings/SettingsOptions.swift

@@ -38,13 +38,21 @@ enum SettingsOptions {
         HUDPlacement.allCases.map { ($0.label, $0.rawValue) }
 
     /// Video-codec preference (`DefaultsKey.codec`) — a soft preference the host falls back from.
-    /// No AV1: this client's VideoToolbox path decodes H.264/HEVC only (hosts don't emit AV1 on
+    /// AV1 appears only on devices with an AV1 hardware decoder (the same
-    /// the native path yet).
+    /// `AV1.hardwareDecodeSupported` gate SessionModel advertises by) — elsewhere it would be a
-    static let codecs: [(label: String, tag: String)] = [
+    /// dead setting the host could never honor. Ordered by the host's resolve precedence
+    /// (HEVC > AV1 > H.264).
+    static let codecs: [(label: String, tag: String)] = {
+        var options: [(label: String, tag: String)] = [
             ("Automatic", "auto"),
             ("HEVC (H.265)", "hevc"),
             ("H.264 (AVC)", "h264"),
         ]
+        if AV1.hardwareDecodeSupported {
+            options.insert(("AV1", "av1"), at: 2)
+        }
+        return options
+    }()
 
     // MARK: - Bitrate
 

clients/apple/Sources/PunktfunkClient/Settings/SettingsView+Sections.swift

@@ -223,9 +223,7 @@ extension SettingsView {
         } header: {
             Text("Audio")
         } footer: {
-            Text("Host audio plays through the speaker; the microphone feeds the "
+            Text(Self.audioFooter)
-                + "host's virtual mic. System default follows macOS device changes. "
-                + "Applies from the next session.")
                 .font(.geist(12, relativeTo: .caption))
                 .foregroundStyle(.secondary)
         }
@@ -257,17 +255,14 @@ extension SettingsView {
     /// `+` chain (with a ternary) inside the ViewBuilder — that single expression blew Swift's
     /// type-checker budget and was what actually broke the iOS archive.
     private var pointerFooterText: String {
-        var text = "Trackpad: your finger nudges the host cursor like a laptop touchpad — tap to "
+        var text = "Trackpad: your finger moves the host cursor like a laptop touchpad — tap "
-        text += "click, two-finger tap for a right click, two-finger drag to scroll, "
+        text += "to click, two-finger tap to right-click, two-finger drag to scroll, "
-        text += "tap-then-drag to hold the button, three-finger tap for the stats overlay. "
+        text += "tap-and-drag to hold, three-finger tap for the stats overlay. Direct pointer: "
-        text += "Direct pointer: the cursor jumps to your finger. Touch passthrough: real "
+        text += "the cursor jumps to your finger. Touch passthrough: real multi-touch reaches "
-        text += "multi-touch reaches the host, for apps that understand touch. Applies from "
+        text += "the host. Applies from the next touch."
-        text += "the next touch."
         if UIDevice.current.userInterfaceIdiom == .pad {
-            text += " Pointer capture locks a hardware mouse/trackpad for relative movement "
+            text += " Pointer capture locks a hardware mouse for relative mouse-look; off sends "
-            text += "(mouse-look); off keeps the pointer free and sends absolute positions. "
+            text += "absolute positions. Needs the stream full-screen and frontmost."
-            text += "The lock needs the stream full-screen and frontmost, and falls back "
-            text += "automatically (Stage Manager, Slide Over)."
         }
         return text
     }
@@ -306,6 +301,42 @@ extension SettingsView {
         #endif
     }
 
+    // Non-tvOS: the Apple TV drives a fixed HDMI mode, so there's no adaptive refresh to allow.
+    @ViewBuilder var vrrSection: some View {
+        #if !os(tvOS)
+        Section {
+            Toggle("Allow VRR", isOn: $allowVRR)
+        } header: {
+            Text("Variable refresh rate")
+        } footer: {
+            Text("Let a ProMotion or adaptive-sync display vary its refresh rate to match the "
+                + "stream — smoother motion without tearing. No effect on fixed-refresh displays. "
+                + "Applies from the next session.")
+                .font(.geist(12, relativeTo: .caption))
+                .foregroundStyle(.secondary)
+        }
+        #endif
+    }
+
+    // macOS-only: iOS/tvOS layers always present on the display's vsync, so the choice only
+    // exists on the Mac (where the layer's own sync must stay off — see MetalVideoPresenter).
+    @ViewBuilder var vsyncSection: some View {
+        #if os(macOS)
+        Section {
+            Toggle("V-Sync", isOn: $vsync)
+        } header: {
+            Text("Presentation")
+        } footer: {
+            Text("Off (default): each frame is shown as soon as it's ready — lowest latency, "
+                + "but frame timing can look uneven and fullscreen may tear. On: frames flip "
+                + "in step with the display's refresh — evenly paced, up to one refresh of "
+                + "added latency. Applies from the next session.")
+                .font(.geist(12, relativeTo: .caption))
+                .foregroundStyle(.secondary)
+        }
+        #endif
+    }
+
     // Stage-2 (Metal/VTDecompressionSession) is the default and only user-visible presenter — it
     // recovers from a wedged decoder, where stage-1's AVSampleBufferDisplayLayer freezes hard on a
     // lost HEVC reference. Stage-1 is kept reachable as a DEBUG-only override for diagnostics, like
@@ -320,12 +351,10 @@ extension SettingsView {
         } header: {
             Text("Video presenter · debug")
         } footer: {
-            Text("Stage 2 (default) decodes explicitly and presents through Metal with a display "
+            Text("Stage 2 (default): explicit decode + Metal present — full HUD latency "
-                + "link — it gives the HUD the end-to-end (capture→on-glass) headline with the "
+                + "breakdown and self-recovery from decode stalls. Stage 1: compressed video "
-                + "host+network/decode/display stage equation and self-recovers from decode "
+                + "straight to the system layer; freezes on a lost HEVC reference, so it's a "
-                + "stalls. Stage 1 feeds compressed video straight to the system display layer; "
+                + "debug fallback only. Applies from the next session.")
-                + "it freezes on a lost HEVC reference frame, so it's a debug fallback only. "
-                + "Applies from the next session.")
                 .font(.geist(12, relativeTo: .caption))
                 .foregroundStyle(.secondary)
         }
@@ -344,12 +373,11 @@ extension SettingsView {
         } header: {
             Text("Video quality")
         } footer: {
-            Text("Codec is a preference — the host falls back if it can't encode the one you pick "
+            Text("Codec is a preference; the host falls back if it can't encode your choice. "
-                + "(and 10-bit/4:4:4 are HEVC-only). HDR requests a 10-bit BT.2020 PQ (HDR10) stream — "
+                + "HDR (HDR10) and full chroma (4:4:4) are HEVC-only, and each engages only when "
-                + "it only engages when the host is sending HDR content AND this display supports HDR. "
+                + "both this device and the host support it — otherwise the stream stays 8-bit "
-                + "4:4:4 requests full chroma (sharper text/UI, more bandwidth) — it only engages when "
+                + "4:2:0 SDR. 4:4:4 sharpens text and UI for extra bandwidth. Applies from the "
-                + "this device can hardware-decode it AND the host opted in. Otherwise the stream stays "
+                + "next session.")
-                + "8-bit 4:2:0 SDR. Applies from the next session.")
                 .font(.geist(12, relativeTo: .caption))
                 .foregroundStyle(.secondary)
         }
@@ -380,9 +408,8 @@ extension SettingsView {
             Text("Experimental")
         } footer: {
             Text("Adds a “Browse Library…” action to each host that lists its games "
-                + "(Steam + custom) via the host's management API; tap a title to launch it. "
+                + "(Steam + custom); tap a title to launch it. Works once you've paired — no "
-                + "Works once you've paired with the host — the library is authorized by this "
+                + "extra host setup.")
-                + "device's certificate, with no extra host setup.")
                 .font(.geist(12, relativeTo: .caption))
                 .foregroundStyle(.secondary)
         }

clients/apple/Sources/PunktfunkClient/Settings/SettingsView+Support.swift

@@ -54,32 +54,41 @@ extension SettingsView {
     // MARK: - Statistics
 
     static var statisticsFooter: String {
-        let base = "The overlay shows resolution, frame rate, throughput and latency while "
+        let base = "Shows resolution, frame rate, throughput and latency in the chosen "
-            + "streaming, in the chosen corner."
+            + "corner while streaming."
         #if os(macOS) || os(iOS)
-        return base + " Toggle it any time with ⌘⇧S."
+        return base + " Toggle it any time with ⌃⌥⇧S."
         #else
         return base
         #endif
     }
 
+    // MARK: - Audio
+
+    static var audioFooter: String {
+        #if os(macOS)
+        return "Host audio plays through the chosen speaker; your microphone feeds the host's "
+            + "virtual mic. System default follows your Mac's device changes. Applies from the "
+            + "next session."
+        #else
+        return "Host audio plays locally; your microphone feeds the host's virtual mic. "
+            + "Applies from the next session."
+        #endif
+    }
+
     // MARK: - Controllers
 
     static let controllersFooter =
-        "One controller is forwarded to the host, as player 1 — Automatic picks the most "
+        "One controller is forwarded as player 1 — Automatic picks the most recently "
-        + "recently connected one. The type is the virtual pad the host creates: Automatic "
+        + "connected. Type is the virtual pad the host creates; Automatic matches your "
-        + "matches the controller (a DualSense gets adaptive triggers, lightbar, touchpad "
+        + "controller (a DualSense keeps adaptive triggers, lightbar, touchpad and motion). "
-        + "and motion; a DualShock 4 the same minus adaptive triggers), and changes apply "
+        + "Applies from the next session."
-        + "from the next session. Two identical controllers may swap a manual selection "
-        + "after reconnecting."
 
     #if !os(tvOS)
     static let gamepadUIFooter =
-        "When a controller is connected, the host list and game library switch to a "
+        "When a controller connects, the host list and library switch to a controller-"
-        + "controller-friendly layout — larger focus targets, controller-navigable settings, "
+        + "friendly layout — larger focus targets and a swipeable cover browser. Turn this "
-        + "and a swipeable cover browser for the library. Turn this off to always use the "
+        + "off to always use the standard layout."
-        + "standard layout. (The system may still move basic focus with a controller "
-        + "connected even with this off — that's outside the app's control.)"
     #endif
 
     /// "Use controller" choices for this view's manager (see `SettingsOptions.controllerOptions`).

clients/apple/Sources/PunktfunkClient/Settings/SettingsView.swift

@@ -25,6 +25,12 @@ struct SettingsView: View {
     @AppStorage(DefaultsKey.gamepadType) var gamepadType = 0
     @AppStorage(DefaultsKey.bitrateKbps) var bitrateKbps = 0
     @AppStorage(DefaultsKey.presenter) var presenter = "stage2"
+    #if os(macOS)
+    @AppStorage(DefaultsKey.vsync) var vsync = false
+    #endif
+    #if !os(tvOS)
+    @AppStorage(DefaultsKey.allowVRR) var allowVRR = true
+    #endif
     @AppStorage(DefaultsKey.hdrEnabled) var hdrEnabled = true
     @AppStorage(DefaultsKey.enable444) var enable444 = true
     @AppStorage(DefaultsKey.libraryEnabled) var libraryEnabled = false
@@ -106,6 +112,8 @@ struct SettingsView: View {
             Form {
                 presenterSection
                 hdrSection
+                vrrSection
+                vsyncSection
                 windowSection
                 statisticsSection
             }
@@ -234,6 +242,7 @@ struct SettingsView: View {
             Form {
                 presenterSection
                 hdrSection
+                vrrSection
                 statisticsSection
             }
             .formStyle(.grouped)

clients/apple/Sources/PunktfunkClient/Stores/HostStore.swift

@@ -81,6 +81,11 @@ final class HostStore: ObservableObject {
         didSet { persist() }
     }
 
+    /// Saved hosts proven reachable by the periodic QUIC probe (by id) — the mDNS-independent
+    /// counterpart to discovery presence, OR'd into the "online" pip so a routed/VPN host that
+    /// never advertises still reads Online. Not persisted (it's live reachability, not config).
+    @Published var probedOnline: Set<StoredHost.ID> = []
+
     init() {
         if let data = UserDefaults.standard.data(forKey: Self.key),
            let decoded = try? JSONDecoder().decode([StoredHost].self, from: data) {
@@ -110,6 +115,23 @@ final class HostStore: ObservableObject {
         hosts[i].lastConnected = Date()
     }
 
+    /// One reachability sweep, driving `probedOnline`: probe every saved host NOT currently
+    /// advertising on `discovery` (mDNS already answers for those) off the main actor via a bounded,
+    /// trust-agnostic QUIC handshake, then publish the reachable set. This is the mDNS-independent
+    /// half of presence — a host reached over a routed network (Tailscale/VPN) never advertises but
+    /// answers here. Call in a loop from a home view's `.task` (cancelled on disappear).
+    func refreshReachability(discovery: HostDiscovery) async {
+        let targets = hosts.filter { !discovery.advertises($0) }
+        var online: Set<StoredHost.ID> = []
+        for host in targets {
+            let reachable = await Task.detached(priority: .utility) {
+                PunktfunkConnection.probe(host: host.address, port: host.port)
+            }.value
+            if reachable { online.insert(host.id) }
+        }
+        probedOnline = online
+    }
+
     func pin(_ hostID: UUID, fingerprint: Data) {
         guard let i = hosts.firstIndex(where: { $0.id == hostID }) else { return }
         hosts[i].pinnedSHA256 = fingerprint

clients/apple/Sources/PunktfunkKit/Connection/HostDiscovery.swift

@@ -127,7 +127,16 @@ public final class HostDiscovery: ObservableObject {
                 .map { $0.trimmingCharacters(in: .whitespaces) }
                 .filter { !$0.isEmpty }
         }
-        let conn = NWConnection(to: result.endpoint, using: .udp)
+        // Resolve over IPv4 only: Network.framework prefers IPv6 (RFC 6724), and the host's OS
+        // mDNS responder often answers AAAA for its hostname even though the punktfunk host stack
+        // (control QUIC + data UDP) binds IPv4 sockets exclusively — a v6-resolved address would
+        // produce a host card whose connect always fails in the Rust core (`host:port` parse).
+        // Same policy as the Android/desktop clients; lift when the stack speaks IPv6.
+        let params = NWParameters.udp
+        if let ip = params.defaultProtocolStack.internetProtocol as? NWProtocolIP.Options {
+            ip.version = .v4
+        }
+        let conn = NWConnection(to: result.endpoint, using: params)
         connections[key] = conn
         conn.stateUpdateHandler = { state in
             MainActor.assumeIsolated { [weak self] in

clients/apple/Sources/PunktfunkKit/Connection/PunktfunkConnection.swift

@@ -112,6 +112,16 @@ public extension PunktfunkConnection {
         }
         return rc == statusOK
     }
+
+    /// Bounded, trust-agnostic QUIC-handshake reachability probe to `host:port` — mDNS-INDEPENDENT,
+    /// so a host reached over a routed network (Tailscale/VPN/another subnet), which never
+    /// advertises, still reports reachable. No pin/identity presented. The display-side companion
+    /// to the dial-first connect fix: lets saved-host "online" pips reflect real reachability.
+    /// Blocking (builds its own runtime) — call OFF the main thread.
+    static func probe(host: String, port: UInt16, timeoutMs: UInt32 = 1500) -> Bool {
+        let rc: Int32 = host.withCString { punktfunk_probe($0, port, timeoutMs) }
+        return rc == statusOK
+    }
 }
 
 public final class PunktfunkConnection {
@@ -259,7 +269,8 @@ public final class PunktfunkConnection {
     /// `2` = HEVC (default / older host), `1` = H.264, `4` = AV1. Build the decoder from THIS. The
     /// resolved value honors the client's `preferredCodec` when the host could emit it.
     public private(set) var resolvedCodec: UInt8 = 2 // PUNKTFUNK_CODEC_HEVC
-    /// The resolved codec as an `AnnexB.VideoCodec` (H.264 vs HEVC) — drives the NAL parsing.
+    /// The resolved codec as a `VideoCodec` (H.264 / HEVC / AV1) — drives the bitstream framing
+    /// (Annex-B NAL parsing vs the AV1 OBU repack).
     public var videoCodec: VideoCodec { VideoCodec(wire: resolvedCodec) }
 
     /// Connect and start a session at the requested mode (the host creates a native virtual

clients/apple/Sources/PunktfunkKit/Input/InputCapture.swift

@@ -24,8 +24,9 @@
 //
 // Forwarding is gated by `forwarding` (driven by StreamLayerView's capture state): the
 // handlers stay attached for the whole session, but while the user has released capture
-// (⌘⎋, focus loss) nothing reaches the host and key events travel the responder chain
+// (⌃⌥⇧Q — the cross-client Ctrl+Alt+Shift+Q — or ⌘⎋, focus loss) nothing reaches the host
-// normally. Everything held is flushed host-side on each transition to released.
+// and key events travel the responder chain normally. Everything held is flushed host-side
+// on each transition to released.
 //
 // GCMouse.current/GCKeyboard.coalesced are process-global singletons with one handler
 // slot each: only one InputCapture can be live per process. `activeCapture` tracks
@@ -108,6 +109,16 @@ public final class InputCapture {
     /// the absolute-vs-relative forwarding lives entirely in StreamLayerView. Main queue.
     public var onToggleCursor: (() -> Void)?
 
+    /// The cross-client combos (Windows/Linux parity: Ctrl+Alt+Shift+Q/D/S), fired from the macOS
+    /// keyDown monitor only WHILE FORWARDING — that's the state in which the app's menu (which
+    /// carries the same key equivalents for discoverability) can't see them, so the monitor is the
+    /// captured-state delivery path; released, the events pass through and the menu handles them.
+    /// ⌃⌥⇧Q releases the captured mouse/keyboard; ⌃⌥⇧D disconnects; ⌃⌥⇧S toggles the stats
+    /// overlay. Main queue.
+    public var onReleaseCapture: (() -> Void)?
+    public var onDisconnect: (() -> Void)?
+    public var onToggleStats: (() -> Void)?
+
     /// Fired when a newer InputCapture takes the process-global GC handler slots (the
     /// singletons hold ONE handler each): the preempted owner must drop its capture
     /// state — its handlers are gone, so it would otherwise sit "captured" with dead
@@ -215,6 +226,32 @@ public final class InputCapture {
                 self.onToggleCursor?()
                 return nil
             }
+            // The cross-client combos (Ctrl+Alt+Shift+Q/D/S — the same set every other
+            // punktfunk client reserves), intercepted only while forwarding so the host never
+            // sees the letter (the ⌃⌥⇧ modifiers were already forwarded as they went down;
+            // they're flushed by the release path / released by the user as usual). The letter
+            // is latched (suppressedVK) so its keyUp doesn't leak to the host either. While
+            // NOT forwarding the events pass through and the menu's identical key equivalents
+            // handle them (with the standard menu-flash feedback). keyCodes are kVK_ANSI_* —
+            // physical positions, layout-independent.
+            if self.forwarding, flags == [.control, .option, .shift] {
+                switch event.keyCode {
+                case 12 /* Q */:
+                    self.suppressedVK = 0x51
+                    self.onReleaseCapture?()
+                    return nil
+                case 2 /* D */:
+                    self.suppressedVK = 0x44
+                    self.onDisconnect?()
+                    return nil
+                case 1 /* S */:
+                    self.suppressedVK = 0x53
+                    self.onToggleStats?()
+                    return nil
+                default:
+                    break
+                }
+            }
             return event
         }
         #endif

clients/apple/Sources/PunktfunkKit/Support/DefaultsKeys.swift

@@ -31,6 +31,17 @@ public enum DefaultsKey {
     /// is higher up), so we fold to mono ourselves. Only meaningful for multi-channel devices.
     public static let micChannel = "punktfunk.micChannel"
     public static let presenter = "punktfunk.presenter"
+    /// macOS: V-Sync the stream's presents — each decoded frame flips on the next display vsync
+    /// (evenly paced, no tearing under direct scanout) instead of as soon as the GPU finishes
+    /// (lowest latency — the default, OFF). Resolved once per session;
+    /// PUNKTFUNK_PRESENT_MODE=immediate|vsync overrides it for A/B. See Stage2Pipeline's header.
+    public static let vsync = "punktfunk.vsync"
+    /// Allow variable refresh rate: hand the display link a wide frame-rate RANGE (low floor,
+    /// preferred = stream rate) so a ProMotion / adaptive-sync display can vary its physical
+    /// refresh to match the stream. On by default; a no-op on fixed-refresh displays. When off,
+    /// macOS lets the link free-run at the display's native rate and iOS keeps its proven 30 Hz
+    /// floor. Read per session/reconfigure by `SessionPresenter.syncFrameRate`.
+    public static let allowVRR = "punktfunk.allowVRR"
     /// Request a 10-bit BT.2020 PQ (HDR10) stream. On by default; only takes effect when the host
     /// has HDR content AND this display supports HDR — otherwise the stream stays 8-bit SDR.
     public static let hdrEnabled = "punktfunk.hdrEnabled"
@@ -57,7 +68,7 @@ public enum DefaultsKey {
     /// macOS: take the window fullscreen while streaming and restore it on the host list. On by default.
     public static let fullscreenWhileStreaming = "punktfunk.fullscreenWhileStreaming"
     /// Show the streaming statistics overlay (mode/fps/throughput/latency). On by default; toggle
-    /// while streaming with ⌘⇧S (macOS / hardware keyboard).
+    /// while streaming with ⌃⌥⇧S (the cross-client Ctrl+Alt+Shift+S; macOS / hardware keyboard).
     public static let hudEnabled = "punktfunk.hudEnabled"
     /// Which corner the statistics overlay sits in — a `HUDPlacement` raw value
     /// ("topLeading"/"topTrailing"/"bottomLeading"/"bottomTrailing"). Default top-trailing.
@@ -67,3 +78,12 @@ public enum DefaultsKey {
     /// whenever a gamepad is connected. On by default; see `GamepadUIEnvironment.isActive`.
     public static let gamepadUIEnabled = "punktfunk.gamepadUIEnabled"
 }
+
+extension Notification.Name {
+    /// Posted by the app's Stream menu ("Release Mouse", ⌃⌥⇧Q): the key window's stream view
+    /// releases input capture if it holds it. Only reachable while NOT captured (a captured
+    /// session swallows the combo in InputCapture's monitor and the frozen cursor can't click
+    /// menus) — it exists so the menu item is honest whenever it CAN fire, and as the shortcut's
+    /// discoverable menu-bar surface.
+    public static let punktfunkReleaseCapture = Notification.Name("io.unom.punktfunk.release-capture")
+}

clients/apple/Sources/PunktfunkKit/Video/AV1.swift

@@ -0,0 +1,561 @@
+// AV1 (low-overhead OBU bitstream) → CoreMedia plumbing — the AV1 sibling of AnnexB.swift.
+//
+// The punktfunk host emits AV1 access units as low-overhead temporal units (the raw encoder
+// output every other client feeds ffmpeg): a temporal-delimiter OBU, then — on every keyframe,
+// per the same in-band-config policy as the NAL codecs — a sequence-header OBU, then the frame
+// OBUs. VideoToolbox instead wants the ISOBMFF 'av01' flavor: a CMVideoFormatDescription
+// carrying an `av1C` configuration record (built from the sequence header), and sample buffers
+// holding the temporal unit with the temporal delimiter stripped and every OBU size-fielded.
+// This file converts between the two.
+//
+// HOT PATH: like AnnexB, both pumps run `formatDescription(fromKeyframe:)` +
+// `sampleBuffer(au:format:)` once per AU, so everything is built on `forEachOBU` — a zero-copy
+// scan over the AU's bytes (ranges, not materialized Datas). A delta AU (no sequence header)
+// costs a few OBU-header reads; the sample repack leaves exactly one copy (source → block
+// buffer), mirroring AnnexB.sampleBuffer.
+//
+// The full sequence-header parse (AV1 spec 5.5.1) runs only when a keyframe actually carries
+// one — it exists to fill the `av1C` record fields (profile/level/tier/depth/chroma) and the
+// colorimetry extensions (so VideoDecoder.isHDRFormat and the presenter's color handling work
+// identically across codecs). The host currently gates 10-bit and 4:4:4 to HEVC, so an AV1
+// stream is 8-bit 4:2:0 today; the parser still reads depth/chroma/color faithfully so nothing
+// here needs touching when that gate lifts.
+
+import CoreMedia
+import Foundation
+import VideoToolbox
+
+public enum AV1 {
+    /// True when this device can hardware-decode AV1 (M3-class Macs, A17 Pro-class iPhones,
+    /// current iPads; false on every Apple TV to date). VideoToolbox has no software AV1
+    /// decoder, so this is the advertisement gate: a client must never invite a stream it
+    /// can't decode in real time.
+    public static let hardwareDecodeSupported: Bool =
+        VTIsHardwareDecodeSupported(kCMVideoCodecType_AV1)
+
+    // MARK: - OBU walking
+
+    /// OBU types (AV1 spec 6.2.2) — only the ones this file dispatches on.
+    enum OBUType {
+        static let sequenceHeader: UInt8 = 1
+        static let temporalDelimiter: UInt8 = 2
+        static let padding: UInt8 = 15
+    }
+
+    /// Walk the OBUs of a low-overhead temporal unit without copying: `body` receives the buffer
+    /// base, each OBU's header range (header byte + optional extension byte + size field, i.e.
+    /// everything before the payload), payload range, and type — and returns false to stop early.
+    /// The walk ends at the first malformed OBU (forbidden bit set, truncated header, or a size
+    /// field overrunning the buffer): a torn AU decodes as garbage anyway and the pumps' keyframe
+    /// recovery re-anchors, so bailing beats guessing at boundaries. An OBU with
+    /// `obu_has_size_field == 0` extends to the end of the buffer (legal only for the last one).
+    /// The base pointer is only valid inside `body`.
+    static func forEachOBU(
+        in data: Data,
+        _ body: (
+            _ base: UnsafePointer<UInt8>, _ header: Range<Int>, _ payload: Range<Int>,
+            _ type: UInt8
+        ) -> Bool
+    ) {
+        data.withUnsafeBytes { (raw: UnsafeRawBufferPointer) in
+            guard let base = raw.bindMemory(to: UInt8.self).baseAddress else { return }
+            let count = raw.count
+            var i = 0
+            while i < count {
+                let start = i
+                let h = base[i]
+                guard h & 0x80 == 0 else { return } // obu_forbidden_bit — not an OBU stream
+                let type = (h >> 3) & 0x0F
+                let hasExtension = h & 0x04 != 0
+                let hasSize = h & 0x02 != 0
+                i += 1
+                if hasExtension {
+                    guard i < count else { return }
+                    i += 1
+                }
+                let payloadLen: Int
+                if hasSize {
+                    guard let (size, sizeLen) = leb128(base: base, at: i, count: count)
+                    else { return }
+                    i += sizeLen
+                    payloadLen = size
+                } else {
+                    payloadLen = count - i // no size field: extends to the end (must be last)
+                }
+                guard i + payloadLen <= count else { return }
+                if !body(base, start..<i, i..<(i + payloadLen), type) { return }
+                i += payloadLen
+            }
+        }
+    }
+
+    /// Decode a leb128 value at `at` (AV1 spec 4.10.5). Returns (value, encoded length) or nil
+    /// on truncation / a value past 32 bits (sizes beyond that are nonsense for an OBU).
+    private static func leb128(
+        base: UnsafePointer<UInt8>, at: Int, count: Int
+    ) -> (Int, Int)? {
+        var value: UInt64 = 0
+        for i in 0..<8 {
+            guard at + i < count else { return nil }
+            let byte = base[at + i]
+            value |= UInt64(byte & 0x7F) << (7 * i)
+            if byte & 0x80 == 0 {
+                guard value <= UInt64(UInt32.max) else { return nil }
+                return (Int(value), i + 1)
+            }
+        }
+        return nil
+    }
+
+    /// leb128-encoded byte length of `value`.
+    private static func leb128Length(_ value: Int) -> Int {
+        var v = UInt32(value)
+        var n = 1
+        while v >= 0x80 {
+            v >>= 7
+            n += 1
+        }
+        return n
+    }
+
+    /// Encode `value` as leb128 into `dst`; returns the byte count written.
+    private static func putLeb128(_ value: Int, into dst: UnsafeMutableRawPointer) -> Int {
+        var v = UInt32(value)
+        var n = 0
+        repeat {
+            var byte = UInt8(v & 0x7F)
+            v >>= 7
+            if v != 0 { byte |= 0x80 }
+            dst.storeBytes(of: byte, toByteOffset: n, as: UInt8.self)
+            n += 1
+        } while v != 0
+        return n
+    }
+
+    // MARK: - Sequence header
+
+    /// The sequence-header fields the `av1C` record and the colorimetry extensions need
+    /// (AV1 spec 5.5; color codes are ITU-T H.273, shared with the HEVC VUI).
+    struct SequenceHeader {
+        var profile: UInt8 = 0
+        var levelIdx0: UInt8 = 0
+        var tier0: UInt8 = 0
+        var highBitdepth = false
+        var twelveBit = false
+        var monochrome = false
+        var subsamplingX = true
+        var subsamplingY = true
+        var chromaSamplePosition: UInt8 = 0
+        /// H.273 codes; 2 = unspecified (the spec default when no color description is coded).
+        var colorPrimaries: UInt8 = 2
+        var transferCharacteristics: UInt8 = 2
+        var matrixCoefficients: UInt8 = 2
+        var fullRange = false
+        var maxWidth = 0
+        var maxHeight = 0
+    }
+
+    /// MSB-first bit reader over the sequence-header payload. Every read is bounds-checked and
+    /// returns nil on overrun — the parser guard-lets each field so a truncated header yields
+    /// nil rather than garbage.
+    private struct BitReader {
+        private let bytes: UnsafePointer<UInt8>
+        private let bitCount: Int
+        private var pos = 0
+
+        init(bytes: UnsafePointer<UInt8>, count: Int) {
+            self.bytes = bytes
+            self.bitCount = count * 8
+        }
+
+        mutating func f(_ n: Int) -> UInt32? {
+            guard n <= 32, pos + n <= bitCount else { return nil }
+            var v: UInt32 = 0
+            for _ in 0..<n {
+                let bit = (bytes[pos >> 3] >> (7 - UInt8(pos & 7))) & 1
+                v = (v << 1) | UInt32(bit)
+                pos += 1
+            }
+            return v
+        }
+
+        mutating func flag() -> Bool? { f(1).map { $0 == 1 } }
+
+        /// uvlc() (spec 4.10.3) — only `num_ticks_per_picture_minus_1` uses it here.
+        mutating func uvlc() -> UInt32? {
+            var leadingZeros = 0
+            while true {
+                guard let b = f(1) else { return nil }
+                if b == 1 { break }
+                leadingZeros += 1
+                if leadingZeros >= 32 { return nil }
+            }
+            if leadingZeros == 0 { return 0 }
+            guard let v = f(leadingZeros) else { return nil }
+            return v + (1 << leadingZeros) - 1
+        }
+    }
+
+    /// Parse a sequence-header OBU payload (spec 5.5.1 — the full walk down to color_config,
+    /// which is what `av1C` + the colorimetry extensions are built from). Returns nil on any
+    /// truncation or spec violation.
+    static func parseSequenceHeader(_ payload: Data) -> SequenceHeader? {
+        payload.withUnsafeBytes { (raw: UnsafeRawBufferPointer) -> SequenceHeader? in
+            guard let base = raw.bindMemory(to: UInt8.self).baseAddress else { return nil }
+            var r = BitReader(bytes: base, count: raw.count)
+            var sh = SequenceHeader()
+
+            guard let profile = r.f(3), profile <= 2 else { return nil }
+            sh.profile = UInt8(profile)
+            guard r.flag() != nil else { return nil } // still_picture
+            guard let reduced = r.flag() else { return nil }
+
+            var decoderModelInfoPresent = false
+            var bufferDelayLengthMinus1 = 0
+            if reduced {
+                guard let level = r.f(5) else { return nil }
+                sh.levelIdx0 = UInt8(level)
+                sh.tier0 = 0
+            } else {
+                guard let timingInfoPresent = r.flag() else { return nil }
+                if timingInfoPresent {
+                    guard r.f(32) != nil, r.f(32) != nil, // num_units_in_display_tick, time_scale
+                          let equalPictureInterval = r.flag()
+                    else { return nil }
+                    if equalPictureInterval, r.uvlc() == nil { return nil }
+                    guard let dmip = r.flag() else { return nil }
+                    decoderModelInfoPresent = dmip
+                    if decoderModelInfoPresent {
+                        guard let bdl = r.f(5), r.f(32) != nil, r.f(5) != nil, r.f(5) != nil
+                        else { return nil }
+                        bufferDelayLengthMinus1 = Int(bdl)
+                    }
+                }
+                guard let initialDisplayDelayPresent = r.flag(),
+                      let opCountMinus1 = r.f(5)
+                else { return nil }
+                for i in 0...Int(opCountMinus1) {
+                    guard r.f(12) != nil, let level = r.f(5) else { return nil }
+                    var tier: UInt32 = 0
+                    if level > 7 {
+                        guard let t = r.f(1) else { return nil }
+                        tier = t
+                    }
+                    if i == 0 {
+                        sh.levelIdx0 = UInt8(level)
+                        sh.tier0 = UInt8(tier)
+                    }
+                    if decoderModelInfoPresent {
+                        guard let present = r.flag() else { return nil }
+                        if present {
+                            let n = bufferDelayLengthMinus1 + 1
+                            guard r.f(n) != nil, r.f(n) != nil, r.f(1) != nil else { return nil }
+                        }
+                    }
+                    if initialDisplayDelayPresent {
+                        guard let present = r.flag() else { return nil }
+                        if present, r.f(4) == nil { return nil }
+                    }
+                }
+            }
+
+            guard let widthBitsMinus1 = r.f(4), let heightBitsMinus1 = r.f(4),
+                  let maxWidthMinus1 = r.f(Int(widthBitsMinus1) + 1),
+                  let maxHeightMinus1 = r.f(Int(heightBitsMinus1) + 1)
+            else { return nil }
+            sh.maxWidth = Int(maxWidthMinus1) + 1
+            sh.maxHeight = Int(maxHeightMinus1) + 1
+
+            if !reduced {
+                guard let frameIdNumbersPresent = r.flag() else { return nil }
+                if frameIdNumbersPresent {
+                    guard r.f(4) != nil, r.f(3) != nil else { return nil }
+                }
+            }
+            // use_128x128_superblock, enable_filter_intra, enable_intra_edge_filter
+            guard r.f(3) != nil else { return nil }
+            if !reduced {
+                // enable_interintra_compound … enable_dual_filter
+                guard r.f(4) != nil, let enableOrderHint = r.flag() else { return nil }
+                if enableOrderHint {
+                    guard r.f(2) != nil else { return nil } // jnt_comp, ref_frame_mvs
+                }
+                guard let chooseScreenContentTools = r.flag() else { return nil }
+                let forceScreenContentTools: UInt32
+                if chooseScreenContentTools {
+                    forceScreenContentTools = 2 // SELECT_SCREEN_CONTENT_TOOLS
+                } else {
+                    guard let v = r.f(1) else { return nil }
+                    forceScreenContentTools = v
+                }
+                if forceScreenContentTools > 0 {
+                    guard let chooseIntegerMv = r.flag() else { return nil }
+                    if !chooseIntegerMv, r.f(1) == nil { return nil }
+                }
+                if enableOrderHint, r.f(3) == nil { return nil } // order_hint_bits_minus_1
+            }
+            // enable_superres, enable_cdef, enable_restoration
+            guard r.f(3) != nil else { return nil }
+
+            // color_config() (spec 5.5.2)
+            guard let highBitdepth = r.flag() else { return nil }
+            sh.highBitdepth = highBitdepth
+            if sh.profile == 2, highBitdepth {
+                guard let twelveBit = r.flag() else { return nil }
+                sh.twelveBit = twelveBit
+            }
+            if sh.profile == 1 {
+                sh.monochrome = false
+            } else {
+                guard let mono = r.flag() else { return nil }
+                sh.monochrome = mono
+            }
+            guard let colorDescriptionPresent = r.flag() else { return nil }
+            if colorDescriptionPresent {
+                guard let cp = r.f(8), let tc = r.f(8), let mc = r.f(8) else { return nil }
+                sh.colorPrimaries = UInt8(cp)
+                sh.transferCharacteristics = UInt8(tc)
+                sh.matrixCoefficients = UInt8(mc)
+            }
+            if sh.monochrome {
+                guard let fullRange = r.flag() else { return nil }
+                sh.fullRange = fullRange
+                sh.subsamplingX = true
+                sh.subsamplingY = true
+                sh.chromaSamplePosition = 0
+                return sh
+            }
+            if sh.colorPrimaries == 1, sh.transferCharacteristics == 13,
+               sh.matrixCoefficients == 0 {
+                // BT.709 + sRGB + identity forces full-range 4:4:4.
+                sh.fullRange = true
+                sh.subsamplingX = false
+                sh.subsamplingY = false
+                return sh
+            }
+            guard let fullRange = r.flag() else { return nil }
+            sh.fullRange = fullRange
+            switch sh.profile {
+            case 0:
+                sh.subsamplingX = true
+                sh.subsamplingY = true
+            case 1:
+                sh.subsamplingX = false
+                sh.subsamplingY = false
+            default: // profile 2
+                if sh.highBitdepth, sh.twelveBit {
+                    guard let ssx = r.flag() else { return nil }
+                    sh.subsamplingX = ssx
+                    if ssx {
+                        guard let ssy = r.flag() else { return nil }
+                        sh.subsamplingY = ssy
+                    } else {
+                        sh.subsamplingY = false
+                    }
+                } else {
+                    sh.subsamplingX = true
+                    sh.subsamplingY = false
+                }
+            }
+            if sh.subsamplingX, sh.subsamplingY {
+                guard let csp = r.f(2) else { return nil }
+                sh.chromaSamplePosition = UInt8(csp)
+            }
+            return sh
+        }
+    }
+
+    // MARK: - Format description
+
+    /// Build a format description from a keyframe AU's in-band sequence header — the AV1
+    /// equivalent of `AnnexB.formatDescription(fromIDR:)`. Returns nil when the AU carries no
+    /// sequence-header OBU (a delta frame): the pumps latch the previous description exactly as
+    /// they do for the NAL codecs. The description carries the `av1C` record (with the sequence
+    /// header as its configOBUs) plus colorimetry extensions mapped from color_config, so
+    /// `VideoDecoder.isHDRFormat` and the presenter treat AV1 like any other stream.
+    public static func formatDescription(fromKeyframe au: Data) -> CMVideoFormatDescription? {
+        // The sequence-header OBU, re-emitted with a size field (encoders size-field everything
+        // in practice; the rewrap also covers a last-OBU-without-size corner).
+        var seqHeaderOBU: Data?
+        var seqHeaderPayload: Data?
+        forEachOBU(in: au) { base, header, payload, type in
+            guard type == OBUType.sequenceHeader else { return true }
+            var obu = Data(capacity: 2 + leb128Length(payload.count) + payload.count)
+            obu.append(base[header.lowerBound] | 0x02) // has_size_field set
+            if base[header.lowerBound] & 0x04 != 0 { // extension byte rides along
+                obu.append(base[header.lowerBound + 1])
+            }
+            var lenBuf = [UInt8](repeating: 0, count: 8)
+            let lenLen = lenBuf.withUnsafeMutableBytes {
+                putLeb128(payload.count, into: $0.baseAddress!)
+            }
+            obu.append(contentsOf: lenBuf[0..<lenLen])
+            obu.append(UnsafeBufferPointer(start: base + payload.lowerBound, count: payload.count))
+            seqHeaderOBU = obu
+            seqHeaderPayload = Data(bytes: base + payload.lowerBound, count: payload.count)
+            return false
+        }
+        guard let seqHeaderOBU, let seqHeaderPayload,
+              let sh = parseSequenceHeader(seqHeaderPayload),
+              sh.maxWidth > 0, sh.maxHeight > 0
+        else { return nil }
+
+        // AV1CodecConfigurationRecord (AV1-ISOBMFF §2.3): 4 fixed bytes + configOBUs.
+        var av1C = Data(capacity: 4 + seqHeaderOBU.count)
+        av1C.append(0x81) // marker=1, version=1
+        av1C.append((sh.profile << 5) | sh.levelIdx0)
+        av1C.append(
+            (sh.tier0 << 7)
+                | ((sh.highBitdepth ? 1 : 0) << 6)
+                | ((sh.twelveBit ? 1 : 0) << 5)
+                | ((sh.monochrome ? 1 : 0) << 4)
+                | ((sh.subsamplingX ? 1 : 0) << 3)
+                | ((sh.subsamplingY ? 1 : 0) << 2)
+                | sh.chromaSamplePosition)
+        av1C.append(0) // no initial_presentation_delay
+        av1C.append(seqHeaderOBU)
+
+        // Colorimetry from color_config's H.273 codes; unspecified (2) falls back to BT.709 —
+        // the host's SDR default, same policy the presenter applies elsewhere.
+        let primaries: CFString = {
+            switch sh.colorPrimaries {
+            case 9: return kCMFormatDescriptionColorPrimaries_ITU_R_2020
+            case 6: return kCMFormatDescriptionColorPrimaries_SMPTE_C
+            case 5: return kCMFormatDescriptionColorPrimaries_EBU_3213
+            default: return kCMFormatDescriptionColorPrimaries_ITU_R_709_2
+            }
+        }()
+        let transfer: CFString = {
+            switch sh.transferCharacteristics {
+            case 16: return kCMFormatDescriptionTransferFunction_SMPTE_ST_2084_PQ
+            case 18: return kCMFormatDescriptionTransferFunction_ITU_R_2100_HLG
+            case 13: return kCMFormatDescriptionTransferFunction_sRGB
+            case 8: return kCMFormatDescriptionTransferFunction_Linear
+            default: return kCMFormatDescriptionTransferFunction_ITU_R_709_2
+            }
+        }()
+        let matrix: CFString = {
+            switch sh.matrixCoefficients {
+            case 9, 10: return kCMFormatDescriptionYCbCrMatrix_ITU_R_2020
+            case 5, 6: return kCMFormatDescriptionYCbCrMatrix_ITU_R_601_4
+            default: return kCMFormatDescriptionYCbCrMatrix_ITU_R_709_2
+            }
+        }()
+        let extensions: [CFString: Any] = [
+            kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms: ["av1C": av1C],
+            kCMFormatDescriptionExtension_ColorPrimaries: primaries,
+            kCMFormatDescriptionExtension_TransferFunction: transfer,
+            kCMFormatDescriptionExtension_YCbCrMatrix: matrix,
+            kCMFormatDescriptionExtension_FullRangeVideo: sh.fullRange,
+        ]
+        var format: CMVideoFormatDescription?
+        let status = CMVideoFormatDescriptionCreate(
+            allocator: kCFAllocatorDefault,
+            codecType: kCMVideoCodecType_AV1,
+            width: Int32(sh.maxWidth), height: Int32(sh.maxHeight),
+            extensions: extensions as CFDictionary,
+            formatDescriptionOut: &format)
+        return status == noErr ? format : nil
+    }
+
+    // MARK: - Sample buffers
+
+    /// Wrap one temporal unit as a decode-ready CMSampleBuffer in the ISOBMFF 'av01' sample
+    /// format: the temporal-delimiter (and padding) OBUs are dropped, every remaining OBU is
+    /// re-emitted with a size field, and — mirroring AnnexB.sampleBuffer — the result is packed
+    /// straight into the CMBlockBuffer's allocation (sized by a first cheap scan). The sequence
+    /// header stays in-band (spec-legal: it's bit-identical to the one in `av1C`, which is
+    /// rebuilt from the same keyframe), preserving the host's self-contained-keyframe policy.
+    public static func sampleBuffer(
+        au: AccessUnit, format: CMVideoFormatDescription
+    ) -> CMSampleBuffer? {
+        // Pass 1: byte scan only — total repacked size of the kept OBUs.
+        var total = 0
+        forEachOBU(in: au.data) { base, header, payload, type in
+            if type == OBUType.temporalDelimiter || type == OBUType.padding { return true }
+            let headerLen = base[header.lowerBound] & 0x04 != 0 ? 2 : 1
+            total += headerLen + leb128Length(payload.count) + payload.count
+            return true
+        }
+        // Nothing decodable (a delimiter-only AU — our host never sends one): drop it rather
+        // than hand the decoder an empty sample.
+        guard total > 0 else { return nil }
+
+        var blockBuffer: CMBlockBuffer?
+        guard CMBlockBufferCreateWithMemoryBlock(
+            allocator: kCFAllocatorDefault, memoryBlock: nil,
+            blockLength: total, blockAllocator: kCFAllocatorDefault,
+            customBlockSource: nil, offsetToData: 0, dataLength: total,
+            flags: kCMBlockBufferAssureMemoryNowFlag, blockBufferOut: &blockBuffer) == noErr,
+            let block = blockBuffer
+        else { return nil }
+        var dstLen = 0
+        var dstPtr: UnsafeMutablePointer<CChar>?
+        guard CMBlockBufferGetDataPointer(
+            block, atOffset: 0, lengthAtOffsetOut: nil, totalLengthOut: &dstLen,
+            dataPointerOut: &dstPtr) == noErr,
+            dstLen == total, let dstPtr
+        else { return nil }
+        // Pass 2: the single copy — header (+extension) byte, size field, payload per OBU.
+        let dst = UnsafeMutableRawPointer(dstPtr)
+        var off = 0
+        forEachOBU(in: au.data) { base, header, payload, type in
+            if type == OBUType.temporalDelimiter || type == OBUType.padding { return true }
+            dst.storeBytes(
+                of: base[header.lowerBound] | 0x02, toByteOffset: off, as: UInt8.self)
+            off += 1
+            if base[header.lowerBound] & 0x04 != 0 {
+                dst.storeBytes(
+                    of: base[header.lowerBound + 1], toByteOffset: off, as: UInt8.self)
+                off += 1
+            }
+            off += putLeb128(payload.count, into: dst.advanced(by: off))
+            dst.advanced(by: off)
+                .copyMemory(from: base + payload.lowerBound, byteCount: payload.count)
+            off += payload.count
+            return true
+        }
+
+        var timing = CMSampleTimingInfo(
+            duration: .invalid,
+            presentationTimeStamp: CMTime(value: Int64(au.ptsNs), timescale: 1_000_000_000),
+            decodeTimeStamp: .invalid)
+        var sampleSize = total
+        var sample: CMSampleBuffer?
+        guard CMSampleBufferCreate(
+            allocator: kCFAllocatorDefault, dataBuffer: block, dataReady: true,
+            makeDataReadyCallback: nil, refcon: nil, formatDescription: format,
+            sampleCount: 1, sampleTimingEntryCount: 1, sampleTimingArray: &timing,
+            sampleSizeEntryCount: 1, sampleSizeArray: &sampleSize,
+            sampleBufferOut: &sample) == noErr
+        else { return nil }
+        // Low-latency display: render on arrival, don't wait for a clock.
+        if let attachments = CMSampleBufferGetSampleAttachmentsArray(sample!, createIfNecessary: true) {
+            let dict = unsafeBitCast(CFArrayGetValueAtIndex(attachments, 0), to: CFMutableDictionary.self)
+            CFDictionarySetValue(
+                dict,
+                Unmanaged.passUnretained(kCMSampleAttachmentKey_DisplayImmediately).toOpaque(),
+                Unmanaged.passUnretained(kCFBooleanTrue).toOpaque())
+        }
+        return sample
+    }
+}
+
+extension VideoCodec {
+    /// Codec-dispatching format-description refresh: the AV1 path keys on an in-band sequence
+    /// header, the NAL codecs on in-band parameter sets — one call site in each pump.
+    public func formatDescription(fromKeyframe au: Data) -> CMVideoFormatDescription? {
+        self == .av1
+            ? AV1.formatDescription(fromKeyframe: au)
+            : AnnexB.formatDescription(fromIDR: au, codec: self)
+    }
+
+    /// Codec-dispatching sample wrap (see `formatDescription(fromKeyframe:)`).
+    public func sampleBuffer(
+        au: AccessUnit, format: CMVideoFormatDescription
+    ) -> CMSampleBuffer? {
+        self == .av1
+            ? AV1.sampleBuffer(au: au, format: format)
+            : AnnexB.sampleBuffer(au: au, format: format, codec: self)
+    }
+}

clients/apple/Sources/PunktfunkKit/Video/AnnexB.swift

@@ -6,8 +6,10 @@
 // buffers whose NALs are 4-byte-length-prefixed. This file converts between the two, for
 // the codec the host resolved in the Welcome (`connection.videoCodec`) — HEVC and H.264
 // differ only in NAL-header layout and which parameter sets exist (HEVC adds a VPS). AV1
-// is not an Annex-B/NAL codec and isn't handled here (hosts don't emit it on the native
+// is not an Annex-B/NAL codec and isn't handled here — its OBU flavor of the same plumbing
-// path yet).
+// lives in AV1.swift, and the pumps reach both through `VideoCodec`'s dispatching
+// `formatDescription(fromKeyframe:)` / `sampleBuffer(au:format:)`, so nothing below is ever
+// called with `.av1`.
 //
 // HOT PATH: both pumps run `formatDescription(fromIDR:codec:)` + `sampleBuffer(au:format:codec:)`
 // once per AU, so the conversion is built on `forEachNAL` — a zero-copy scan over the AU's bytes
@@ -23,10 +25,15 @@ import Foundation
 public enum VideoCodec: Equatable {
     case h264
     case hevc
+    case av1
 
     /// Resolve from the wire `Welcome.codec` byte (`PUNKTFUNK_CODEC_*`; unknown → HEVC).
     public init(wire: UInt8) {
-        self = wire == 0x01 ? .h264 : .hevc // 0x01 = PUNKTFUNK_CODEC_H264
+        switch wire {
+        case 0x01: self = .h264 // PUNKTFUNK_CODEC_H264
+        case 0x04: self = .av1 // PUNKTFUNK_CODEC_AV1
+        default: self = .hevc // PUNKTFUNK_CODEC_HEVC — the default / older-host codec
+        }
     }
 
     /// NAL unit type from a NAL's first byte. HEVC: bits 1..6; H.264: bits 0..4.
@@ -140,6 +147,8 @@ public enum AnnexB {
             sets = [vps, sps, pps]
         case .h264:
             sets = [sps, pps]
+        case .av1:
+            return nil // OBU stream, no parameter-set NALs — handled in AV1.swift, never here
         }
 
         var format: CMVideoFormatDescription?
@@ -175,6 +184,8 @@ public enum AnnexB {
                     parameterSetSizes: sizes,
                     nalUnitHeaderLength: 4,
                     formatDescriptionOut: &format)
+            case .av1:
+                break // unreachable — the .av1 arm above already returned
             }
         }
         return status == noErr ? format : nil

clients/apple/Sources/PunktfunkKit/Video/MetalVideoPresenter.swift

@@ -1,12 +1,15 @@
 // Stage-2 presenter, present half: draw a decoded NV12 / P010 / 4:4:4 CVPixelBuffer into a CAMetalLayer
-// drawable with a Y′CbCr→RGB shader. The hosting view's CADisplayLink drives `render` once per vsync
+// drawable with a Y′CbCr→RGB shader. The hosting view's CADisplayLink still paces the pipeline once per
-// (via Stage2Pipeline.renderTick) with the target present time, so a present can be stamped and the
+// vsync, but the actual `render` runs on Stage2Pipeline's dedicated RENDER THREAD (the link tick just
-// present tail hand-paced. See docs apple-stage2-presenter.md.
+// signals it), so `nextDrawable()`'s blocking never lands on the main thread. See docs
+// apple-stage2-presenter.md.
 //
-// Main-thread only: created during view setup, `render`/`configure` called from the view's CADisplayLink
+// Threading: created during view setup (main); `render`/`configure` run on the render thread — the
-// (which fires on the main runloop). The Metal objects + texture cache are touched only here. The one
+// layer's drawable/format/colour mutations all happen there (CAMetalLayer is designed for dedicated
-// exception is `setHdrMeta`, called from the pump thread — it hops the layer write to main so every
+// render threads; only the layer's GEOMETRY — frame/contentsScale — is touched from main, in
-// CALayer mutation stays on one thread.
+// SessionPresenter.layout, which also pushes the resulting pixel size here via `setDrawableTarget`
+// so the render thread never reads layer geometry cross-thread). `setHdrMeta` (pump thread) and
+// `setDrawableTarget` (main) only write lock-guarded staging state the render thread drains.
 
 #if canImport(Metal) && canImport(QuartzCore)
 import CoreGraphics
@@ -144,14 +147,23 @@ public final class MetalVideoPresenter {
     private var textureCache: CVMetalTextureCache?
 
     /// Current layer configuration — switched in `configure(hdr:)` when a frame's HDR-ness differs.
-    /// Main-thread only (read + written from `render`/`configure`, all on the display-link runloop).
+    /// Render-thread confined once the pipeline runs (Stage2Pipeline.start's one pre-thread
+    /// `configure` call is ordered before the thread starts, so it doesn't race).
     private var hdrActive = false
     /// Last HDR mastering grade received via `setHdrMeta` (the host's 0xCE). Cached so a mid-session
     /// SDR→HDR flip's `configureColor` re-applies the real grade instead of clobbering it back to the
     /// bare reference-white anchor (an out-of-order race otherwise: `setHdrMeta` and the flip both write
-    /// `edrMetadata`). Main-thread only.
+    /// `edrMetadata`). Render-thread confined (drained from `pendingHdrMeta` at the top of `render`).
     private var lastHdrMeta: PunktfunkConnection.HdrMeta?
 
+    /// Cross-thread staging, all under `stagingLock`: the pump thread parks a fresh 0xCE grade in
+    /// `pendingHdrMeta` and the main thread parks the layout-derived drawable pixel size in
+    /// `drawableTarget`; the render thread drains both at the top of `render`, so every layer
+    /// format/colour mutation stays on the one thread that also calls `nextDrawable()`.
+    private let stagingLock = NSLock()
+    private var pendingHdrMeta: PunktfunkConnection.HdrMeta?
+    private var drawableTarget: CGSize = .zero
+
     #if DEBUG
     /// Last logged "decoded→drawable" signature, so the diagnostic logs only on a size/HDR change.
     private var lastSizeSig = ""
@@ -191,12 +203,18 @@ public final class MetalVideoPresenter {
         layer.framebufferOnly = true
         layer.isOpaque = true
         #if os(macOS)
-        // The display link already paces exactly one present per vsync. Leaving the layer's own vsync
+        // displaySyncEnabled MUST stay false on macOS. It has flip-flopped, so the full history:
-        // wait on means `commandBuffer.present` ALSO blocks for the hardware vsync, so `nextDrawable()`
+        // sync ON was tried twice and starves the drawable pool both times — on macOS 26 a synced
-        // stalls the MAIN thread until a drawable frees — windowed, the WindowServer's looser
+        // present only reaches glass when the WindowServer composites the window, and its FramePacing
-        // compositing hides it; FULLSCREEN's tighter path serializes the main thread to the display and
+        // path does not treat our out-of-band image-queue presents as damage, so with a static scene
-        // the stall surfaces as bad judder. Disabling the layer-level sync lets present return promptly
+        // the ONLY recurring damage is the 1 Hz stats HUD update: presents queue, all drawables stay
-        // (the display link is the pacing source) — the fix for the fullscreen stutter. macOS-only.
+        // held, `nextDrawable()` sleeps (sampled: ~70% of the render thread inside
+        // CAMetalLayerPrivateNextDrawableLocked → usleep), and the stream turns into a ~1 fps
+        // slideshow with normal-LOOKING stats (each rare frame is fresh, newest-wins ring). The
+        // 94fb7d1b fullscreen judder was the same starvation biting the then-main-thread render.
+        // With sync OFF the flip is immediate; the vsync alignment that sync was supposed to give
+        // (the HUD-off direct-scanout pacing fix) comes from scheduling the present at the display
+        // link's target time instead (`present(at:)` — see `render`).
         layer.displaySyncEnabled = false
         #endif
         // The drawable is rendered at the LAYER's pixel size (set per-frame in `render`), so the
@@ -226,11 +244,12 @@ public final class MetalVideoPresenter {
         self.layer = layer
     }
 
-    /// Configure the layer + active pipeline for an SDR or HDR session. MAIN THREAD ONLY. Called once at
+    /// Configure the layer + active pipeline for an SDR or HDR session. Called once at session start
-    /// session start and again per-frame from `render` (idempotent — the guard makes a same-state call a
+    /// (main, before the render thread exists) and again per-frame from `render` on the RENDER THREAD
-    /// no-op), so a mid-session HDR toggle (the host re-inits its encoder; the decoded `frame.isHDR`
+    /// (idempotent — the guard makes a same-state call a no-op), so a mid-session HDR toggle (the host
-    /// flips) reconfigures here automatically. HDR uses an rgba16Float drawable + BT.2020 PQ colour space
+    /// re-inits its encoder; the decoded `frame.isHDR` flips) reconfigures here automatically. HDR uses
-    /// + EDR with a 203-nit reference-white anchor; SDR uses the plain 8-bit sRGB path.
+    /// an rgba16Float drawable + BT.2020 PQ colour space + EDR with a 203-nit reference-white anchor;
+    /// SDR uses the plain 8-bit sRGB path.
     public func configure(hdr: Bool) {
         guard hdr != hdrActive else { return }
         hdrActive = hdr
@@ -273,36 +292,65 @@ public final class MetalVideoPresenter {
     #endif
 
     /// Update the HDR mastering metadata (drained from the host's 0xCE datagram) to refine the system
-    /// tone-map from the real grade. Called from the PUMP thread, so the layer write is hopped to MAIN
+    /// tone-map from the real grade. Called from the PUMP thread — the grade is only PARKED here (lock-
-    /// (every CALayer mutation stays on one thread). The grade is cached so a later SDR→HDR
+    /// guarded); the render thread applies it at the top of the next `render`, keeping every layer
-    /// `configureColor` re-applies it; the `edrMetadata` write is gated on `hdrActive` (setting it on an
+    /// colour mutation on the one thread that also vends drawables.
-    /// SDR layer is harmless but pointless, and the flip will apply it anyway).
     public func setHdrMeta(_ meta: PunktfunkConnection.HdrMeta) {
-        DispatchQueue.main.async { [weak self] in
+        stagingLock.lock()
-            guard let self else { return }
+        pendingHdrMeta = meta
-            self.lastHdrMeta = meta
+        stagingLock.unlock()
-            // tvOS has no edrMetadata — the cached grade is still kept above (harmless), it just can't
-            // be applied to the layer there. macOS/iOS refine the system tone-map from the real grade.
-            #if !os(tvOS)
-            if self.hdrActive { self.layer.edrMetadata = self.makeEDR(meta) }
-            #endif
-        }
     }
 
-    /// Draw one decoded frame to the next drawable and present it. MAIN THREAD (the display link).
+    /// Park the drawable pixel size the shader should render at: the metal layer's laid-out frame ×
-    /// `isHDR` selects the 10-bit BT.2020 PQ path vs the 8-bit BT.709 path and is reconciled with the
+    /// contentsScale, both owned by the MAIN thread (SessionPresenter.layout pushes it on every layout/
+    /// backing change). The render thread reads this instead of the layer's geometry so it never
+    /// touches main-owned CALayer state. Zero until the first layout → `render` falls back to the
+    /// decoded frame size.
+    public func setDrawableTarget(_ size: CGSize) {
+        stagingLock.lock()
+        drawableTarget = size
+        stagingLock.unlock()
+    }
+
+    /// Draw one decoded frame to the next drawable and present it. RENDER THREAD (Stage2Pipeline's;
+    /// `nextDrawable()` may block up to a frame — that wait belongs here, never on main). `isHDR`
+    /// selects the 10-bit BT.2020 PQ path vs the 8-bit BT.709 path and is reconciled with the
     /// layer config via `configure`. Returns true on success; false when there's no drawable yet, a
     /// texture couldn't be made, or Metal errored — the caller then doesn't stamp a present (and can
     /// requeue the frame). `onPresented` fires once the drawable actually reached glass, with the
     /// `CLOCK_REALTIME` instant from the drawable's `presentedTime` — or nil when the system reports
     /// none (a dropped drawable). It runs on a Metal callback thread; keep the handler thread-safe.
+    ///
+    /// `presentAtMediaTime` (a `CACurrentMediaTime`-basis host time — the display link's
+    /// `targetTimestamp`) schedules the flip ON the vsync instead of "as soon as the GPU finishes":
+    /// with the layer's own sync disabled (mandatory on macOS — see init) an immediate present hits
+    /// glass mid-refresh whenever the layer is direct-scanout promoted (fullscreen, no HUD), which
+    /// is the "frametimes are off with the stats HUD closed" report. nil presents immediately
+    /// (`PUNKTFUNK_PRESENT_MODE=immediate` — the pre-fix behavior, kept as a diagnostic A/B).
     @discardableResult
     public func render(
         _ pixelBuffer: CVPixelBuffer, isHDR: Bool = false,
+        presentAtMediaTime: CFTimeInterval? = nil,
         onPresented: ((Int64?) -> Void)? = nil
     ) -> Bool {
+        // Drain the cross-thread staging (see `stagingLock`): the layout-derived drawable size and
+        // any freshly-arrived HDR grade, both applied from this thread.
+        stagingLock.lock()
+        let targetFromLayout = drawableTarget
+        let newHdrMeta = pendingHdrMeta
+        pendingHdrMeta = nil
+        stagingLock.unlock()
+
         // Reconcile the layer with the decoded frame's HDR-ness (handles a mid-session SDR↔HDR flip).
         configure(hdr: isHDR)
+        if let newHdrMeta {
+            self.lastHdrMeta = newHdrMeta
+            // tvOS has no edrMetadata — the cached grade is still kept (a later HDR flip's
+            // configureColor is where it matters there). macOS/iOS refine the live tone-map now.
+            #if !os(tvOS)
+            if hdrActive { layer.edrMetadata = makeEDR(newHdrMeta) }
+            #endif
+        }
 
         // P010/x444 store 10-bit luma/chroma in 16-bit samples → R16/RG16; NV12/444v is 8-bit → R8/RG8.
         // Derived from the actual decoded buffer so a 4:4:4 (full chroma plane) frame just works.
@@ -319,22 +367,18 @@ public final class MetalVideoPresenter {
                 pixelBuffer, plane: 1, format: tenBit ? .rg16Unorm : .rg8Unorm, cache: textureCache)
         else { return false }
 
-        // Size the drawable to the LAYER's pixels (bounds × contentsScale, both set by the hosting
+        // Size the drawable to the LAYER's pixels (its laid-out frame × contentsScale, pushed here by
-        // view's layout) so the Catmull-Rom shader performs the decoded→on-screen scale in one pass:
+        // SessionPresenter.layout via `setDrawableTarget` — not read off the layer, whose geometry the
+        // main thread owns) so the Catmull-Rom shader performs the decoded→on-screen scale in one pass:
         // a native-mode session stays exactly 1:1 (the kernel reduces to the identity texel), and a
         // window bigger than the host's mode gets bicubic luma instead of the compositor's bilinear.
-        // Before the first layout (empty bounds) fall back to the decoded size. drawableSize does NOT
+        // Before the first layout (zero target) fall back to the decoded size. drawableSize does NOT
         // track bounds (defaults to 0), so set it BEFORE nextDrawable; re-set only on a change
         // (layout / Reconfigure / HDR flip — and every frame of a live resize, which is fine).
         let decodedSize = CGSize(
             width: CVPixelBufferGetWidth(pixelBuffer), height: CVPixelBufferGetHeight(pixelBuffer))
-        let scale = layer.contentsScale
+        let targetSize = (targetFromLayout.width > 0 && targetFromLayout.height > 0)
-        let boundsSize = layer.bounds.size
+            ? targetFromLayout : decodedSize
-        let targetSize = (boundsSize.width > 0 && boundsSize.height > 0)
-            ? CGSize(
-                width: (boundsSize.width * scale).rounded(),
-                height: (boundsSize.height * scale).rounded())
-            : decodedSize
         if layer.drawableSize != targetSize { layer.drawableSize = targetSize }
         #if DEBUG
         logSizeIfChanged(decoded: decodedSize, drawable: targetSize)
@@ -374,7 +418,13 @@ public final class MetalVideoPresenter {
             }
             #endif
         }
-        commandBuffer.present(drawable) // present at the next vsync — lowest latency
+        // Scheduled on the vsync when the pipeline gave us the link's target (see the doc comment);
+        // immediate otherwise. A target already in the past presents immediately — same thing.
+        if let presentAtMediaTime {
+            commandBuffer.present(drawable, atTime: presentAtMediaTime)
+        } else {
+            commandBuffer.present(drawable)
+        }
         // Hold the CVMetalTextures + source pixel buffer (its IOSurface) alive until the GPU finishes
         // sampling — releasing them at scope exit could free the backing mid-read.
         commandBuffer.addCompletedHandler { _ in _ = (luma, chroma, pixelBuffer) }

clients/apple/Sources/PunktfunkKit/Video/SessionPresenter.swift

@@ -68,10 +68,13 @@ final class SessionPresenter {
             baseLayer.addSublayer(metal)
             metalLayer = metal
             stage2 = pipeline
+            // The link is the vsync CLOCK + putBack-retry nudge, not the presentation trigger
+            // (frame arrival is — see Stage2Pipeline's header). timestamp→targetTimestamp is the
+            // link's own report of the current refresh period (tracks VRR rate changes).
             let proxy = DisplayLinkProxy { [weak self] link in
                 self?.stage2?.renderTick(
-                    targetPresentNs: Stage2Pipeline.realtimeNs(
+                    targetMediaTime: link.targetTimestamp,
-                        forDisplayLinkTimestamp: link.targetTimestamp))
+                    period: link.targetTimestamp - link.timestamp)
             }
             let link = makeDisplayLink(proxy, #selector(DisplayLinkProxy.tick(_:)))
             link.add(to: .main, forMode: .common)
@@ -87,23 +90,37 @@ final class SessionPresenter {
         }
     }
 
-    /// Ask the display link for the stream's own cadence. iOS/tvOS-only: without an explicit
+    /// Hint the display link with the stream's cadence. On iOS/tvOS a range is always required:
-    /// range, ProMotion devices cap CADisplayLink at 60 Hz (iPhones additionally need
+    /// without one, ProMotion devices cap CADisplayLink at 60 Hz (iPhones additionally need
     /// `CADisableMinimumFrameDurationOnPhone` in Info.plist), so a 120 fps stream would present
-    /// at half rate with the ring silently dropping every other frame. `maximum` allows up to
+    /// at half rate with the ring silently dropping every other frame. `maximum` allows up to 120
-    /// 120 so the system MAY tick faster than a sub-120 stream (each extra tick is a near-free
+    /// so the system MAY tick faster than a sub-120 stream (each extra tick is a near-free empty
-    /// empty `renderTick`, and presenting on a denser grid shortens the decode→glass wait); the
+    /// `renderTick`, and presenting on a denser grid shortens the decode→glass wait).
-    /// macOS NSView link already tracks its display and must NOT be capped to the stream rate.
+    ///
+    /// The `allowVRR` setting (default on) widens that hint into a true variable-refresh request:
+    /// `preferred` = the stream rate with a low floor, so a ProMotion / adaptive-sync display can
+    /// drop its physical refresh to match the content. With VRR off we fall back to the proven
+    /// behavior — iOS keeps a 30 Hz floor; macOS leaves the NSView link at its display's native
+    /// rate (it already tracks the display and must NOT be capped to the stream rate).
     /// Re-applied from `layout` so a mid-session `Reconfigure` picks up a new refresh.
     private func syncFrameRate(hz: UInt32) {
-        #if !os(macOS)
         guard hz > 0, let link = stage2Link else { return }
         let hzF = Float(hz)
-        if link.preferredFrameRateRange.preferred != hzF {
+        let allowVRR = UserDefaults.standard.object(forKey: DefaultsKey.allowVRR) as? Bool ?? true
-            link.preferredFrameRateRange = CAFrameRateRange(
+        #if os(macOS)
-                minimum: min(30, hzF), maximum: max(hzF, 120), preferred: hzF)
+        // Off: `.default` = the link free-runs at the display's native rate (pre-VRR behavior).
-        }
+        // On: request the content rate with a 24 Hz floor — capped at the display, never at the
+        // stream rate, so an adaptive-sync panel can track the stream.
+        let range: CAFrameRateRange = allowVRR
+            ? CAFrameRateRange(minimum: min(hzF, 24), maximum: max(hzF, 120), preferred: hzF)
+            : .default
+        #else
+        // A range is mandatory here (see above); VRR only lowers the floor (24 vs 30) so the
+        // panel can drop deeper to match content on a sub-rate or momentarily stalling stream.
+        let floor = allowVRR ? min(hzF, 24) : min(hzF, 30)
+        let range = CAFrameRateRange(minimum: floor, maximum: max(hzF, 120), preferred: hzF)
         #endif
+        if link.preferredFrameRateRange != range { link.preferredFrameRateRange = range }
     }
 
     /// Position the stage-2 metal sublayer aspect-fit in the hosting view (the host streams at the
@@ -127,6 +144,11 @@ final class SessionPresenter {
         metalLayer.contentsScale = contentsScale
         metalLayer.frame = fit
         CATransaction.commit()
+        // Hand the resulting pixel size to the render thread (it must not read layer geometry
+        // cross-thread) — this is what the presenter sizes its drawable to.
+        stage2?.setDrawableTarget(CGSize(
+            width: (fit.width * contentsScale).rounded(),
+            height: (fit.height * contentsScale).rounded()))
     }
 
     /// Stop the active pump/pipeline (≤ one poll timeout; stage-2 joins its pump) and detach the

clients/apple/Sources/PunktfunkKit/Video/Stage2Pipeline.swift

@@ -1,25 +1,60 @@
-// Stage-2 presenter orchestrator: a pump thread pulls AUs → VideoDecoder; the decoder's async output
+// Stage-2 presenter orchestrator. GOAL ARCHITECTURE (the result of the 2026-07 pacing saga —
-// drops the newest decoded frame into a 1-slot ring; the hosting view's display link calls `renderTick`
+// read this before touching presentation):
-// once per vsync to draw + present the newest ready frame and stamp the unified latency stages
-// (end-to-end capture→on-glass, plus the decode and display stage terms —
-// design/stats-unification.md). Mirrors StreamPump's lifecycle (one per start; cancel is permanent).
 //
-// Threading: the pump runs on its own thread; the decoder callback on a VT thread; `renderTick` +
+//   net pump ──► VideoDecoder (VT async) ──► newest-wins 1-slot ring ──► RENDER THREAD ──► CAMetalLayer
-// `start`/`stop` on the MAIN thread (the view's CADisplayLink fires there). Only the ring (lock-guarded)
+//
-// and the decoder/presenter (internally locked / main-hopped) cross threads.
+// • The render thread is woken by FRAME ARRIVAL (the decoder callback signals it), never gated on
+//   the display link: on macOS the WindowServer's damage tracking / FramePacing does not count our
+//   out-of-band presents, so anything display-link-gated stalls exactly when the rest of the screen
+//   goes quiet (adaptive-sync displays idle the link down). A decoded frame is always presented
+//   promptly. The display link remains only as (a) a vsync CLOCK (phase + period, for the opt-in
+//   V-Sync policy below), (b) a retry tick for a frame that couldn't get a drawable (`putBack`),
+//   and (c) the iOS ProMotion rate hint.
+// • The layer's own displaySyncEnabled stays FALSE on macOS — synced presents starve the drawable
+//   pool outright (see MetalVideoPresenter's init for the post-mortem).
+// • Present policy is a USER SETTING (DefaultsKey.vsync; PUNKTFUNK_PRESENT_MODE=immediate|vsync
+//   overrides it for A/B), resolved once per session in start():
+//     – V-Sync OFF (default): present immediately — lowest latency, the long-proven behavior.
+//     – V-Sync ON: present(at: next vsync) predicted from the link's last phase/period, at most one
+//       period ahead by construction, falling back to immediate when the link data is stale — a
+//       schedule can never sit far in the future holding drawables hostage.
+// • Rendering lives on its own thread so any `nextDrawable()` wait lands off-main (input, SwiftUI).
+//
+// The render thread also stamps the unified latency stages (end-to-end capture→on-glass + decode and
+// display stage terms — design/stats-unification.md). Mirrors StreamPump's lifecycle (one per start;
+// cancel is permanent). PUNKTFUNK_PRESENT_DEBUG=1 prints per-second pacing stats (see
+// PresentDebugStats).
+//
+// Threading: the pump runs on its own thread; the decoder callback on a VT thread; the render loop on
+// the render thread; `renderTick` + `start`/`stop` on the MAIN thread (the view's CADisplayLink fires
+// there). Only the ring (lock-guarded), the vsync clock (lock-guarded), and the decoder/presenter
+// (internally locked / staged) cross threads.
 
 #if canImport(Metal) && canImport(QuartzCore)
 import AVFoundation
 import Foundation
 import QuartzCore
 
+/// PUNKTFUNK_PRESENT_DEBUG=1: the render thread prints a once-per-second line with the decode
+/// (ring-submit) rate, present rate, failed/empty wakes and the slowest render call — for
+/// diagnosing pacing regressions without instruments. Plain print: the unbundled CLI client's
+/// stdout is the cheapest reliable capture channel.
+let presentDebug = ProcessInfo.processInfo.environment["PUNKTFUNK_PRESENT_DEBUG"] == "1"
+
 /// Newest-ready 1-slot ring: the decoder overwrites (drops the older undisplayed frame — lowest
 /// latency, no smoothing buffer), the display link takes-and-clears. Sendable; lock-guarded.
 private final class ReadyRing: @unchecked Sendable {
     private let lock = NSLock()
     private var frame: ReadyFrame?
+    /// Ring submissions since the last `drainSubmitted` — the decode rate for the
+    /// PUNKTFUNK_PRESENT_DEBUG stat line.
+    private var submitted = 0
     func submit(_ f: ReadyFrame) {
-        lock.lock(); frame = f; lock.unlock()
+        lock.lock(); frame = f; submitted += 1; lock.unlock()
+    }
+    func drainSubmitted() -> Int {
+        lock.lock(); defer { lock.unlock() }
+        let n = submitted; submitted = 0; return n
     }
     func take() -> ReadyFrame? {
         lock.lock(); defer { lock.unlock() }
@@ -37,6 +72,86 @@ private final class ReadyRing: @unchecked Sendable {
     }
 }
 
+/// The display's vsync grid as last reported by the display link (target timestamp + period,
+/// `CACurrentMediaTime` basis), written on main by `renderTick`, read by the render thread to
+/// schedule V-Sync-mode presents. A shared box (like `ReadyRing`) so neither thread captures the
+/// pipeline itself. Sendable; lock-guarded.
+private final class VsyncClock: @unchecked Sendable {
+    private let lock = NSLock()
+    private var target: CFTimeInterval = 0
+    private var period: CFTimeInterval = 0
+
+    func set(target t: CFTimeInterval, period p: CFTimeInterval) {
+        lock.lock(); target = t; period = p; lock.unlock()
+    }
+
+    /// The next vsync at or after `now`, extrapolated from the last reported phase/period — by
+    /// construction less than one period ahead, so a scheduled present can never sit far in the
+    /// future holding its drawable. nil (⇒ present immediately) when the link has reported nothing
+    /// yet, its period is nonsense, or its data is STALE (an idle/suspended link on an
+    /// adaptive-sync display — exactly the case where scheduling onto its grid stalls the stream).
+    func nextVsync(after now: CFTimeInterval) -> CFTimeInterval? {
+        lock.lock(); defer { lock.unlock() }
+        guard period > 0.0005, target > 0, now - target < 0.25 else { return nil }
+        if target >= now { return target }
+        return target + ceil((now - target) / period) * period
+    }
+}
+
+/// PUNKTFUNK_PRESENT_DEBUG=1 aggregation: one printed line per second from the render thread with
+/// the decode rate, render outcomes, the slowest render call (≈ nextDrawable wait) and the deltas
+/// between system-reported on-glass times (vsync-aligned presents show clean refresh-period
+/// multiples; immediate flips scatter). Lock-guarded — `presented` lands on a Metal callback thread.
+private final class PresentDebugStats: @unchecked Sendable {
+    private let lock = NSLock()
+    private var last = CACurrentMediaTime()
+    private var ok = 0, failed = 0, empty = 0, dropped = 0
+    private var maxRenderMs = 0.0
+    private var lastGlassNs: Int64 = 0
+    private var glassDeltasMs: [Double] = []
+
+    func emptyWake() { lock.lock(); empty += 1; lock.unlock() }
+
+    func renderReturned(ok rendered: Bool, tookMs: Double) {
+        lock.lock()
+        if rendered { ok += 1 } else { failed += 1 }
+        maxRenderMs = max(maxRenderMs, tookMs)
+        lock.unlock()
+    }
+
+    func presented(atNs: Int64?) {
+        lock.lock()
+        if let atNs {
+            if lastGlassNs > 0 { glassDeltasMs.append(Double(atNs - lastGlassNs) / 1e6) }
+            lastGlassNs = atNs
+        } else {
+            dropped += 1
+        }
+        lock.unlock()
+    }
+
+    func flushIfDue(ring: ReadyRing) {
+        lock.lock()
+        let now = CACurrentMediaTime()
+        guard now - last >= 1 else { lock.unlock(); return }
+        last = now
+        let decoded = ring.drainSubmitted()
+        let deltas = glassDeltasMs.sorted()
+        let p50 = deltas.isEmpty ? 0 : deltas[deltas.count / 2]
+        let dMax = deltas.last ?? 0
+        let line = String(
+            format: "pf-present decoded=%d ok=%d fail=%d empty=%d dropped=%d "
+                + "maxRenderMs=%.1f glassDeltaMs p50=%.2f max=%.2f n=%d",
+            decoded, ok, failed, empty, dropped, maxRenderMs, p50, dMax, deltas.count)
+        ok = 0; failed = 0; empty = 0; dropped = 0
+        maxRenderMs = 0
+        glassDeltasMs.removeAll(keepingCapacity: true)
+        lock.unlock()
+        print(line)
+        fflush(stdout) // stdout is a pipe when captured — flush per line or nothing shows
+    }
+}
+
 public final class Stage2Pipeline {
     private let ring = ReadyRing()
     private let presenter: MetalVideoPresenter
@@ -54,6 +169,19 @@ public final class Stage2Pipeline {
     private let pumpStopped = DispatchSemaphore(value: 0)
     private var pumpJoinable = false
 
+    /// Render-thread plumbing. `renderSignal` wakes the render thread — signalled by the DECODER
+    /// callback on every frame (the primary trigger: presentation must never be gated on the
+    /// display link, see the header) and by each display-link tick (the `putBack` retry + the
+    /// vsync-clock refresh). Signals coalesce harmlessly (an extra wake finds an empty ring and
+    /// goes back to sleep). `vsyncClock` is the link's last phase/period for V-Sync-mode
+    /// scheduling. Lock-guarded boxes — the render thread, like the pump thread, must not capture
+    /// `self`, or a missed stop() would leak a spinning pipeline. `renderStopped`/`renderJoinable`
+    /// mirror the pump's bounded join.
+    private let renderSignal = DispatchSemaphore(value: 0)
+    private let vsyncClock = VsyncClock()
+    private let renderStopped = DispatchSemaphore(value: 0)
+    private var renderJoinable = false
+
     /// The Metal layer the hosting view installs + sizes.
     public var layer: CAMetalLayer { presenter.layer }
 
@@ -74,6 +202,7 @@ public final class Stage2Pipeline {
         self.displayMeter = displayMeter
         let ring = ring
         let recovery = recovery
+        let renderSignal = renderSignal
         self.decoder = VideoDecoder(
             onDecoded: { frame in
                 // Decode stage = received→decoded, both client CLOCK_REALTIME (offset 0 — no
@@ -82,6 +211,8 @@ public final class Stage2Pipeline {
                 decodeMeter?.record(
                     ptsNs: UInt64(frame.receivedNs), atNs: frame.decodedNs, offsetNs: 0)
                 ring.submit(frame)
+                // FRAME ARRIVAL is the render trigger (never the display link — see the header).
+                renderSignal.signal()
             },
             // Async decode failure (a bad P-frame referencing a lost/corrupt IDR): the pump resets to
             // re-gate on the next IDR, and we ask the host to send one now (infinite GOP — it wouldn't
@@ -146,7 +277,7 @@ public final class Stage2Pipeline {
                     }
                     guard let au = try connection.nextAU(timeoutMs: 100) else { continue }
                     onFrame?(au)
-                    if let f = AnnexB.formatDescription(fromIDR: au.data, codec: connection.videoCodec) {
+                    if let f = connection.videoCodec.formatDescription(fromKeyframe: au.data) {
                         format = f          // refreshed on every IDR (mode changes included)
                         awaitingIDR = false // a fresh IDR re-anchored decode — recovery complete
                     }
@@ -176,34 +307,89 @@ public final class Stage2Pipeline {
         thread.qualityOfService = .userInteractive
         pumpJoinable = true
         thread.start()
-    }
 
-    /// MAIN thread, once per vsync. Present the newest ready frame (if any). The latency stamps
+        // The render thread: one present per display-link signal. It owns every layer format/colour/
-    /// use the drawable's ACTUAL on-glass instant (`addPresentedHandler`/`presentedTime` — the
+        // drawable interaction (see MetalVideoPresenter's threading notes); with displaySyncEnabled on,
-    /// handler fires on a Metal callback thread; the meters are thread-safe), falling back to
+        // nextDrawable's up-to-a-frame wait lands here instead of on main. The 100 ms timed wait is
-    /// `targetPresentNs` — the display link's target present instant, already converted to
+        // only the stop-flag poll for a session whose link stopped ticking.
-    /// `CLOCK_REALTIME` (see `realtimeNs(forDisplayLinkTimestamp:)`) — when the system reports
+        let ring = ring
-    /// no presented time (a dropped drawable). A frame that could not be rendered (no drawable
-    /// yet) goes back into the ring so the next tick retries it.
-    public func renderTick(targetPresentNs: Int64) {
-        guard let frame = ring.take() else { return }
-        let offsetNs = offsetNs
         let endToEndMeter = endToEndMeter
         let displayMeter = displayMeter
-        let rendered = presenter.render(frame.pixelBuffer, isHDR: frame.isHDR) { presentedNs in
+        let offsetNs = offsetNs
-            let atNs = presentedNs ?? targetPresentNs
+        let renderSignal = renderSignal
+        let renderStopped = renderStopped
+        // Present policy — the user's V-Sync setting (default OFF = immediate, the long-proven
+        // lowest-latency behavior); PUNKTFUNK_PRESENT_MODE=immediate|vsync overrides it for A/B.
+        // Resolved once per session.
+        let presentMode = ProcessInfo.processInfo.environment["PUNKTFUNK_PRESENT_MODE"]
+        let vsyncEnabled = presentMode == "vsync"
+            || (presentMode != "immediate"
+                && UserDefaults.standard.bool(forKey: DefaultsKey.vsync))
+        let debugStats = presentDebug ? PresentDebugStats() : nil
+        let vsyncClock = vsyncClock
+        let renderThread = Thread {
+            defer { renderStopped.signal() }
+            while !token.isStopped {
+                if renderSignal.wait(timeout: .now() + .milliseconds(100)) == .timedOut {
+                    debugStats?.flushIfDue(ring: ring)
+                    continue
+                }
+                guard !token.isStopped, let frame = ring.take() else {
+                    debugStats?.emptyWake()
+                    debugStats?.flushIfDue(ring: ring)
+                    continue
+                }
+                // V-Sync ON: flip on the next predicted vsync (< one period out, stale link ⇒
+                // immediate — see VsyncClock). OFF: flip as soon as the GPU finishes.
+                let presentAt = vsyncEnabled
+                    ? vsyncClock.nextVsync(after: CACurrentMediaTime()) : nil
+                let renderStarted = CACurrentMediaTime()
+                let rendered = presenter.render(
+                    frame.pixelBuffer, isHDR: frame.isHDR, presentAtMediaTime: presentAt
+                ) { presentedNs in
+                    // Fallback stamp for a dropped drawable (no system presentedTime): "now" on
+                    // the Metal callback, converted to the CLOCK_REALTIME the meters live in.
+                    let atNs = presentedNs
+                        ?? Stage2Pipeline.realtimeNs(forDisplayLinkTimestamp: CACurrentMediaTime())
                     // End-to-end = capture→on-glass, measured directly (skew-corrected via the
                     // connect-time clock offset) — the HUD headline.
                     endToEndMeter?.record(ptsNs: frame.ptsNs, atNs: atNs, offsetNs: offsetNs)
                     // Display stage = decoded → on-glass. Both instants are client CLOCK_REALTIME,
                     // so no skew offset applies.
                     displayMeter?.record(ptsNs: UInt64(frame.decodedNs), atNs: atNs, offsetNs: 0)
+                    debugStats?.presented(atNs: presentedNs)
                 }
+                debugStats?.renderReturned(
+                    ok: rendered, tookMs: (CACurrentMediaTime() - renderStarted) * 1000)
                 if !rendered { ring.putBack(frame) }
+                debugStats?.flushIfDue(ring: ring)
+            }
+        }
+        renderThread.name = "punktfunk-stage2-render"
+        renderThread.qualityOfService = .userInteractive
+        renderJoinable = true
+        renderThread.start()
     }
 
-    /// Stop the pump (≤ one poll timeout) and drop the decode session. MAIN THREAD; idempotent. Does not
+    /// MAIN thread, once per display-link tick: refresh the vsync clock (V-Sync-mode scheduling)
-    /// close the connection. A restart needs a fresh Stage2Pipeline (the stop is permanent).
+    /// and nudge the render thread. The nudge is NOT the presentation trigger — frame arrival is
+    /// (see the header) — it only retries a frame a transient `nextDrawable` failure put back into
+    /// the ring, which matters under the host's infinite GOP where a static scene sends no
+    /// replacement frame.
+    public func renderTick(targetMediaTime: CFTimeInterval, period: CFTimeInterval) {
+        vsyncClock.set(target: targetMediaTime, period: period)
+        renderSignal.signal()
+    }
+
+    /// Forward the layout-derived drawable pixel size to the presenter (MAIN thread — see
+    /// `MetalVideoPresenter.setDrawableTarget`).
+    public func setDrawableTarget(_ size: CGSize) {
+        presenter.setDrawableTarget(size)
+    }
+
+    /// Stop the pump + render thread (≤ one poll timeout each) and drop the decode session. MAIN
+    /// THREAD; idempotent. Does not close the connection. A restart needs a fresh Stage2Pipeline
+    /// (the stop is permanent).
     public func stop() {
         token.stop()
         // Join the pump (bounded: ≤ one nextAU poll + an in-flight decode) before resetting the decoder,
@@ -213,11 +399,22 @@ public final class Stage2Pipeline {
             pumpJoinable = false
             _ = pumpStopped.wait(timeout: .now() + 0.5)
         }
+        // Wake + join the render thread (bounded: it may sit in `nextDrawable` for up to ~a frame; a
+        // timed-out join is fine — the loop exits at its next stop-flag check, and a final present on
+        // the detached layer is harmless).
+        if renderJoinable {
+            renderJoinable = false
+            renderSignal.signal()
+            _ = renderStopped.wait(timeout: .now() + 0.5)
+        }
         decoder.reset()
         recovery.bind(nil) // stop requesting keyframes once the session is torn down
     }
 
-    deinit { token.stop() }
+    deinit {
+        token.stop()
+        renderSignal.signal() // wake the render thread so it can observe the stop and exit
+    }
 
     /// Convert a `CADisplayLink.targetTimestamp` (CACurrentMediaTime basis) to a `CLOCK_REALTIME`
     /// nanosecond instant — the present clock the AU pts + skew offset live in. Projects to the target

clients/apple/Sources/PunktfunkKit/Video/StreamPump.swift

@@ -71,7 +71,7 @@ final class StreamPump {
 
                     guard let au = try connection.nextAU(timeoutMs: 100) else { continue }
                     onFrame?(au)
-                    let idrFormat = AnnexB.formatDescription(fromIDR: au.data, codec: connection.videoCodec)
+                    let idrFormat = connection.videoCodec.formatDescription(fromKeyframe: au.data)
                     if let f = idrFormat {
                         format = f          // refreshed on every IDR (mode changes included)
                         if awaitingIDR {
@@ -95,7 +95,7 @@ final class StreamPump {
                     }
                     wasFailed = failed
                     guard let f = format,
-                          let sample = AnnexB.sampleBuffer(au: au, format: f, codec: connection.videoCodec),
+                          let sample = connection.videoCodec.sampleBuffer(au: au, format: f),
                           !token.isStopped // don't enqueue a stale frame after a restart
                     else { continue }
                     layer.enqueue(sample)

clients/apple/Sources/PunktfunkKit/Video/VideoDecoder.swift

@@ -1,4 +1,5 @@
-// Stage-2 presenter, decode half: explicit VideoToolbox decode of the host's HEVC AUs.
+// Stage-2 presenter, decode half: explicit VideoToolbox decode of the host's AUs (H.264 /
+// HEVC / AV1 — whatever the Welcome resolved).
 //
 // Stage-1 hands compressed samples to AVSampleBufferDisplayLayer, which decodes AND presents
 // internally with no per-frame callback — so neither decode-completion nor present can be
@@ -61,8 +62,8 @@ public final class VideoDecoder: @unchecked Sendable {
     /// depth / HDR). Read inside `createSessionLocked` under `lock`.
     private var chroma444 = false
 
-    /// The negotiated codec (`connection.videoCodec`), set once at session start. Drives the AnnexB
+    /// The negotiated codec (`connection.videoCodec`), set once at session start. Drives the
-    /// NAL parsing (H.264 vs HEVC parameter sets). Read under `lock`.
+    /// bitstream framing (H.264/HEVC NAL parsing vs AV1 OBU repack). Read under `lock`.
     private var codec: VideoCodec = .hevc
 
     public init(
@@ -84,8 +85,8 @@ public final class VideoDecoder: @unchecked Sendable {
         lock.unlock()
     }
 
-    /// Select the negotiated codec (H.264 vs HEVC). Call once at session start, before decoding,
+    /// Select the negotiated codec (H.264 / HEVC / AV1). Call once at session start, before
-    /// from `connection.videoCodec`. Thread-safe.
+    /// decoding, from `connection.videoCodec`. Thread-safe.
     public func setCodec(_ c: VideoCodec) {
         lock.lock()
         codec = c
@@ -93,8 +94,9 @@ public final class VideoDecoder: @unchecked Sendable {
     }
 
     /// Submit one AU for asynchronous decode, (re)creating the session if `format` changed. The
-    /// caller resolves `format` from the IDR exactly as stage-1 does (`AnnexB.formatDescription`).
+    /// caller resolves `format` from the keyframe exactly as stage-1 does
-    /// Returns false if the session couldn't be created or the frame couldn't be submitted.
+    /// (`VideoCodec.formatDescription(fromKeyframe:)`). Returns false if the session couldn't be
+    /// created or the frame couldn't be submitted.
     @discardableResult
     public func decode(au: AccessUnit, format newFormat: CMVideoFormatDescription) -> Bool {
         lock.lock()
@@ -112,7 +114,7 @@ public final class VideoDecoder: @unchecked Sendable {
         // invalidate the session between here and DecodeFrame. The VT output callback takes the
         // ring lock, not this one, so there's no re-entrancy. DecodeFrame is async — non-blocking.
         guard let session,
-              let sample = AnnexB.sampleBuffer(au: au, format: newFormat, codec: codec)
+              let sample = codec.sampleBuffer(au: au, format: newFormat)
         else { lock.unlock(); return false }
         var infoOut = VTDecodeInfoFlags()
         let status = VTDecompressionSessionDecodeFrame(
@@ -199,13 +201,14 @@ public final class VideoDecoder: @unchecked Sendable {
         var callback = VTDecompressionOutputCallbackRecord(
             decompressionOutputCallback: decoderOutputCallback,
             decompressionOutputRefCon: Unmanaged.passUnretained(self).toOpaque())
-        // 4:4:4 sessions REQUIRE a hardware decoder: we only advertise 4:4:4 when the hardware probe
+        // 4:4:4 and AV1 sessions REQUIRE a hardware decoder: both are only advertised when the
-        // passed, so a hardware-incapable mode (e.g. a resolution past the HW 4:4:4 ceiling) must fail
+        // hardware gate passed (the 4:4:4 probe / `AV1.hardwareDecodeSupported`), so a
-        // HERE, synchronously, letting the pump's backstop end the session — rather than silently
+        // hardware-incapable mode (e.g. a resolution past a HW ceiling) must fail HERE,
-        // falling back to a software 4:4:4 decoder far too slow for a real-time stream. 4:2:0 keeps the
+        // synchronously, letting the pump's backstop end the session — rather than silently
-        // software fallback (nil spec) as a robustness net.
+        // falling back to a software decoder far too slow for a real-time stream. 4:2:0
+        // H.264/HEVC keeps the software fallback (nil spec) as a robustness net.
         let spec: CFDictionary? =
-            chroma444
+            chroma444 || codec == .av1
             ? [kVTVideoDecoderSpecification_RequireHardwareAcceleratedVideoDecoder: true] as CFDictionary
             : nil
         var newSession: VTDecompressionSession?

clients/apple/Sources/PunktfunkKit/Views/StreamView.swift

@@ -7,10 +7,11 @@
 //
 // The view also owns the input-capture state machine (Moonlight-style): capture is a
 // deliberate, reversible state — engaged when the stream starts and when the user clicks
-// into the video, released by ⌘⎋ or focus loss, and NEVER engaged by mere app
+// into the video, released by ⌃⌥⇧Q (the cross-client Ctrl+Alt+Shift+Q), ⌘⎋, or focus
-// activation (the click that activates the window may be a title-bar drag or a resize —
+// loss, and NEVER engaged by mere app activation (the click that activates the window may
-// warping the cursor there is exactly the intrusiveness this design removes). While
+// be a title-bar drag or a resize — warping the cursor there is exactly the intrusiveness
-// released, nothing is forwarded to the host and the local cursor is free.
+// this design removes). While released, nothing is forwarded to the host and the local
+// cursor is free.
 //
 // macOS-first (NSViewRepresentable); the iOS variant is the same layer under
 // UIViewRepresentable.
@@ -83,6 +84,7 @@ public struct StreamView: NSViewRepresentable {
     private let connection: PunktfunkConnection
     private let captureEnabled: Bool
     private let onCaptureChange: ((Bool) -> Void)?
+    private let onDisconnectRequest: (() -> Void)?
     private let onFrame: (@Sendable (AccessUnit) -> Void)?
     private let onSessionEnd: (@Sendable () -> Void)?
     private let endToEndMeter: LatencyMeter?
@@ -93,14 +95,17 @@ public struct StreamView: NSViewRepresentable {
     /// `captureEnabled: false` disables input capture entirely while UI (e.g. a trust
     /// prompt) is layered over the stream; flipping it to true auto-engages capture
     /// once. `onCaptureChange` (main thread) reports engage/release — drive the HUD's
-    /// "click to capture" / "⌘⎋ releases" hint with it. The meters record the unified latency
+    /// "click to capture" / "⌃⌥⇧Q releases" hint with it. `onDisconnectRequest` (main
-    /// stages when the stage-2 presenter is active (design/stats-unification.md):
+    /// thread) fires on the reserved ⌃⌥⇧D combo while captured — the owner ends the
-    /// `endToEndMeter` capture→on-glass, `decodeMeter` received→decoded, `displayMeter`
+    /// session (released, the same combo reaches the Stream menu instead). The meters
-    /// decoded→on-glass.
+    /// record the unified latency stages when the stage-2 presenter is active
+    /// (design/stats-unification.md): `endToEndMeter` capture→on-glass, `decodeMeter`
+    /// received→decoded, `displayMeter` decoded→on-glass.
     public init(
         connection: PunktfunkConnection,
         captureEnabled: Bool = true,
         onCaptureChange: ((Bool) -> Void)? = nil,
+        onDisconnectRequest: (() -> Void)? = nil,
         onFrame: (@Sendable (AccessUnit) -> Void)? = nil,
         onSessionEnd: (@Sendable () -> Void)? = nil,
         endToEndMeter: LatencyMeter? = nil,
@@ -110,6 +115,7 @@ public struct StreamView: NSViewRepresentable {
         self.connection = connection
         self.captureEnabled = captureEnabled
         self.onCaptureChange = onCaptureChange
+        self.onDisconnectRequest = onDisconnectRequest
         self.onFrame = onFrame
         self.onSessionEnd = onSessionEnd
         self.endToEndMeter = endToEndMeter
@@ -120,6 +126,7 @@ public struct StreamView: NSViewRepresentable {
     public func makeNSView(context: Context) -> StreamLayerView {
         let view = StreamLayerView()
         view.onCaptureChange = onCaptureChange
+        view.onDisconnectRequest = onDisconnectRequest
         view.captureEnabled = captureEnabled
         view.endToEndMeter = endToEndMeter
         view.decodeMeter = decodeMeter
@@ -130,6 +137,7 @@ public struct StreamView: NSViewRepresentable {
 
     public func updateNSView(_ view: StreamLayerView, context: Context) {
         view.onCaptureChange = onCaptureChange
+        view.onDisconnectRequest = onDisconnectRequest
         view.captureEnabled = captureEnabled
         view.endToEndMeter = endToEndMeter
         view.decodeMeter = decodeMeter
@@ -189,6 +197,10 @@ public final class StreamLayerView: NSView {
     /// Reports engage/release on the main thread.
     public var onCaptureChange: ((Bool) -> Void)?
 
+    /// Fired (main thread) when the captured-state ⌃⌥⇧D combo asks to end the session — the
+    /// view can't do that itself (the connection's owner disconnects).
+    public var onDisconnectRequest: (() -> Void)?
+
     /// Main-thread only. False = input capture disabled outright (UI layered over the
     /// stream); flipping to true auto-engages once.
     public var captureEnabled = true {
@@ -215,6 +227,16 @@ public final class StreamLayerView: NSView {
         ) { [weak self] _ in
             self?.releaseCapture()
         })
+        // The Stream menu's "Release Mouse" item (⌃⌥⇧Q's discoverable menu-bar surface). Only
+        // the key window's stream may act — same ownership rule as the ⌘⎋ toggle. (While
+        // captured the combo never reaches the menu — InputCapture's monitor handles it — so
+        // in practice this fires only as a not-captured no-op; wired for honesty.)
+        appObservers.append(NotificationCenter.default.addObserver(
+            forName: .punktfunkReleaseCapture, object: nil, queue: .main
+        ) { [weak self] _ in
+            guard let self, self.window?.isKeyWindow == true else { return }
+            self.releaseCapture()
+        })
     }
 
     public required init?(coder: NSCoder) { fatalError("not used") }
@@ -562,6 +584,24 @@ public final class StreamLayerView: NSView {
         // (see the cursorVisible resolution below): toggling it on under gamescope's relative-only
         // input traps the pointer. Restore this body when absolute/synthetic-cursor support lands.
         capture.onToggleCursor = {}
+        // The cross-client combos (⌃⌥⇧Q/D/S — Ctrl+Alt+Shift on the other clients), delivered by
+        // the monitor only while captured; the same key-window ownership rule as ⌘⎋ throughout.
+        capture.onReleaseCapture = { [weak self] in
+            guard let self, self.window?.isKeyWindow == true else { return }
+            self.releaseCapture()
+        }
+        capture.onDisconnect = { [weak self] in
+            guard let self, self.window?.isKeyWindow == true else { return }
+            self.onDisconnectRequest?()
+        }
+        capture.onToggleStats = { [weak self] in
+            guard self?.window?.isKeyWindow == true else { return }
+            // Flip the shared setting directly — every @AppStorage reader (the HUD's visibility,
+            // the menu item's title) observes UserDefaults, so this is the same as the menu path.
+            let defaults = UserDefaults.standard
+            let current = defaults.object(forKey: DefaultsKey.hudEnabled) as? Bool ?? true
+            defaults.set(!current, forKey: DefaultsKey.hudEnabled)
+        }
         capture.start()
         inputCapture = capture
 

clients/apple/Sources/PunktfunkKit/Views/StreamViewIOS.swift

@@ -54,10 +54,15 @@ public struct StreamView: UIViewControllerRepresentable {
     private let decodeMeter: LatencyMeter?
     private let displayMeter: LatencyMeter?
 
+    /// `onDisconnectRequest` exists for call-site parity with the macOS StreamView (the
+    /// captured-state ⌃⌥⇧D combo is detected by the macOS NSEvent monitor only); on iOS a
+    /// hardware keyboard reaches Disconnect through the Stream menu's key equivalent instead,
+    /// so the parameter is accepted and unused here.
     public init(
         connection: PunktfunkConnection,
         captureEnabled: Bool = true,
         onCaptureChange: ((Bool) -> Void)? = nil,
+        onDisconnectRequest: (() -> Void)? = nil,
         onFrame: (@Sendable (AccessUnit) -> Void)? = nil,
         onSessionEnd: (@Sendable () -> Void)? = nil,
         endToEndMeter: LatencyMeter? = nil,

clients/apple/Tests/PunktfunkKitTests/AV1Tests.swift

@@ -0,0 +1,306 @@
+// Real-bitstream tests for the AV1 OBU → CoreMedia plumbing (AV1.swift): the OBU walk, the
+// sequence-header parse, the `av1C` format description, the sample repack, the VideoCodec
+// dispatch — and, on AV1-hardware devices, a real VTDecompressionSession decode of the blob
+// (the AV1 counterpart of VideoToolboxRoundTripTests; there is no VT AV1 *encoder*, so the
+// bitstream is generated offline).
+//
+// Blobs: the first two temporal units of an SVT-AV1 clip — a keyframe TU (temporal delimiter +
+// sequence header + frame) and a delta TU (temporal delimiter + frame), exactly the wire shape
+// the punktfunk host emits. Generated with:
+//   ffmpeg -f lavfi -i testsrc2=size=320x180:rate=30 -frames:v 2 \
+//          -c:v libsvtav1 -preset 12 -crf 63 -g 30 -f obu out.obu
+// then split on the temporal-delimiter OBUs. 320×180 clears the hardware decoder's
+// minimum-dimension floor (see Probe444Blobs). Ground truth (ffprobe + a reference parse):
+// Main profile (0), level_idx 0, tier 0, 8-bit, 4:2:0, no color description (unspecified),
+// studio range, max frame 320×180, chroma sample position 0.
+
+import CoreMedia
+import VideoToolbox
+import XCTest
+@testable import PunktfunkKit
+
+/// Sendable holder for the values the (background-thread) decode callback writes.
+private final class FrameBox: @unchecked Sendable {
+    let lock = NSLock()
+    var frame: ReadyFrame?
+    var error: OSStatus?
+}
+
+final class AV1Tests: XCTestCase {
+    // MARK: - OBU walk
+
+    func testOBUWalkKeyframe() {
+        var seen: [(type: UInt8, payloadCount: Int)] = []
+        var lastEnd = 0
+        AV1.forEachOBU(in: Data(Self.keyframeTU)) { _, header, payload, type in
+            XCTAssertEqual(header.lowerBound, lastEnd, "OBUs must be contiguous")
+            XCTAssertEqual(header.upperBound, payload.lowerBound)
+            lastEnd = payload.upperBound
+            seen.append((type, payload.count))
+            return true
+        }
+        XCTAssertEqual(lastEnd, Self.keyframeTU.count, "walk must cover the whole TU")
+        XCTAssertEqual(seen.map(\.type), [
+            AV1.OBUType.temporalDelimiter, AV1.OBUType.sequenceHeader, 6, // 6 = OBU_FRAME
+        ])
+        XCTAssertEqual(seen[0].payloadCount, 0)
+        XCTAssertEqual(seen[1].payloadCount, 11)
+    }
+
+    func testOBUWalkStopsEarly() {
+        var calls = 0
+        AV1.forEachOBU(in: Data(Self.keyframeTU)) { _, _, _, _ in
+            calls += 1
+            return false
+        }
+        XCTAssertEqual(calls, 1)
+    }
+
+    func testOBUWalkRejectsGarbage() {
+        // 0x80 = forbidden bit set: not an OBU stream, the walk must not call the body.
+        AV1.forEachOBU(in: Data([0x80, 0x00, 0x01])) { _, _, _, _ in
+            XCTFail("garbage must not yield OBUs")
+            return true
+        }
+        // A size field overrunning the buffer stops the walk at the previous OBU.
+        var truncated = Data([0x12, 0x00]) // valid TD
+        truncated.append(contentsOf: [0x0A, 0x7F, 0x01]) // seq header claiming 127 bytes, 1 present
+        var types: [UInt8] = []
+        AV1.forEachOBU(in: truncated) { _, _, _, type in
+            types.append(type)
+            return true
+        }
+        XCTAssertEqual(types, [AV1.OBUType.temporalDelimiter])
+    }
+
+    // MARK: - Sequence header
+
+    func testSequenceHeaderParse() throws {
+        // The sequence-header OBU payload sits at bytes 4..<15 (TD 2 bytes, header+size 2 bytes).
+        let payload = Data(Self.keyframeTU[4..<15])
+        let sh = try XCTUnwrap(AV1.parseSequenceHeader(payload))
+        XCTAssertEqual(sh.profile, 0) // Main
+        XCTAssertEqual(sh.levelIdx0, 0)
+        XCTAssertEqual(sh.tier0, 0)
+        XCTAssertFalse(sh.highBitdepth)
+        XCTAssertFalse(sh.twelveBit)
+        XCTAssertFalse(sh.monochrome)
+        XCTAssertTrue(sh.subsamplingX) // profile 0 ⇒ 4:2:0
+        XCTAssertTrue(sh.subsamplingY)
+        XCTAssertEqual(sh.chromaSamplePosition, 0)
+        XCTAssertEqual(sh.colorPrimaries, 2) // no color description ⇒ unspecified
+        XCTAssertEqual(sh.transferCharacteristics, 2)
+        XCTAssertEqual(sh.matrixCoefficients, 2)
+        XCTAssertFalse(sh.fullRange)
+        XCTAssertEqual(sh.maxWidth, 320)
+        XCTAssertEqual(sh.maxHeight, 180)
+    }
+
+    func testSequenceHeaderRejectsTruncation() {
+        // The parse consumes exactly 79 bits of this header (it stops after
+        // chroma_sample_position — the last field av1C needs), so 10 bytes suffice and the
+        // 11th only carries fields past the parse. Everything shorter must fail cleanly.
+        let payload = Data(Self.keyframeTU[4..<15])
+        for cut in 0..<10 {
+            XCTAssertNil(
+                AV1.parseSequenceHeader(payload.prefix(cut)),
+                "a header truncated to \(cut) bytes must not parse")
+        }
+        XCTAssertNotNil(AV1.parseSequenceHeader(payload.prefix(10)))
+    }
+
+    // MARK: - Format description
+
+    func testFormatDescriptionFromKeyframe() throws {
+        let format = try XCTUnwrap(AV1.formatDescription(fromKeyframe: Data(Self.keyframeTU)))
+        XCTAssertEqual(CMFormatDescriptionGetMediaSubType(format), kCMVideoCodecType_AV1)
+        let dims = CMVideoFormatDescriptionGetDimensions(format)
+        XCTAssertEqual(dims.width, 320)
+        XCTAssertEqual(dims.height, 180)
+
+        // The av1C record: marker/version, profile+level, the packed flags byte (4:2:0, 8-bit,
+        // csp 0 → 0x0C), no presentation delay — then the sequence-header OBU verbatim.
+        let atoms = try XCTUnwrap(
+            CMFormatDescriptionGetExtension(
+                format,
+                extensionKey: kCMFormatDescriptionExtension_SampleDescriptionExtensionAtoms)
+                as? [String: Any])
+        let av1C = try XCTUnwrap(atoms["av1C"] as? Data)
+        XCTAssertEqual([UInt8](av1C.prefix(4)), [0x81, 0x00, 0x0C, 0x00])
+        XCTAssertEqual([UInt8](av1C.dropFirst(4)), [UInt8](Self.keyframeTU[2..<15]),
+                       "configOBUs must be the size-fielded sequence-header OBU")
+
+        // Unspecified color codes fall back to BT.709 studio range — and the transfer-function
+        // extension is what keeps VideoDecoder.isHDRFormat working for AV1.
+        let transfer = CMFormatDescriptionGetExtension(
+            format, extensionKey: kCMFormatDescriptionExtension_TransferFunction) as? String
+        XCTAssertEqual(transfer, kCMFormatDescriptionTransferFunction_ITU_R_709_2 as String)
+        XCTAssertFalse(VideoDecoder.isHDRFormat(format))
+    }
+
+    func testDeltaTUYieldsNoFormat() {
+        XCTAssertNil(AV1.formatDescription(fromKeyframe: Data(Self.deltaTU)),
+                     "a delta TU has no sequence header — the pumps must latch the previous one")
+    }
+
+    // MARK: - Sample repack
+
+    func testSampleRepack() throws {
+        let format = try XCTUnwrap(AV1.formatDescription(fromKeyframe: Data(Self.keyframeTU)))
+        let au = AccessUnit(
+            data: Data(Self.keyframeTU), ptsNs: 1_000_000, frameIndex: 0, flags: 0, receivedNs: 0)
+        let sample = try XCTUnwrap(AV1.sampleBuffer(au: au, format: format))
+
+        // The blob is already fully size-fielded, so the repack is byte-identical minus the
+        // 2-byte temporal delimiter.
+        let block = try XCTUnwrap(CMSampleBufferGetDataBuffer(sample))
+        var length = 0
+        var ptr: UnsafeMutablePointer<CChar>?
+        XCTAssertEqual(CMBlockBufferGetDataPointer(
+            block, atOffset: 0, lengthAtOffsetOut: nil, totalLengthOut: &length,
+            dataPointerOut: &ptr), noErr)
+        let bytes = UnsafeRawBufferPointer(start: ptr, count: length)
+        XCTAssertEqual([UInt8](bytes), [UInt8](Self.keyframeTU[2...]))
+
+        // No temporal delimiter survives, and the pts round-trips at nanosecond scale.
+        AV1.forEachOBU(in: Data(bytes)) { _, _, _, type in
+            XCTAssertNotEqual(type, AV1.OBUType.temporalDelimiter)
+            return true
+        }
+        let pts = CMSampleBufferGetPresentationTimeStamp(sample)
+        XCTAssertEqual(pts.value, 1_000_000)
+        XCTAssertEqual(pts.timescale, 1_000_000_000)
+    }
+
+    func testSampleRepackDelimiterOnlyIsDropped() throws {
+        let format = try XCTUnwrap(AV1.formatDescription(fromKeyframe: Data(Self.keyframeTU)))
+        let au = AccessUnit(
+            data: Data([0x12, 0x00]), ptsNs: 0, frameIndex: 0, flags: 0, receivedNs: 0)
+        XCTAssertNil(AV1.sampleBuffer(au: au, format: format))
+    }
+
+    // MARK: - VideoCodec dispatch
+
+    func testWireCodecResolution() {
+        XCTAssertEqual(VideoCodec(wire: 0x01), .h264)
+        XCTAssertEqual(VideoCodec(wire: 0x02), .hevc)
+        XCTAssertEqual(VideoCodec(wire: 0x04), .av1)
+        XCTAssertEqual(VideoCodec(wire: 0xFF), .hevc) // unknown → the default codec
+    }
+
+    func testCodecDispatch() {
+        let au = Data(Self.keyframeTU)
+        XCTAssertNotNil(VideoCodec.av1.formatDescription(fromKeyframe: au))
+        // The same bytes through the NAL paths must not parse — proves the dispatch matters.
+        XCTAssertNil(VideoCodec.hevc.formatDescription(fromKeyframe: au))
+        XCTAssertNil(VideoCodec.h264.formatDescription(fromKeyframe: au))
+    }
+
+    // MARK: - Hardware decode (end to end)
+
+    /// The AV1 counterpart of VideoToolboxRoundTripTests' decode half: the keyframe blob through
+    /// the REAL VideoDecoder (format description → repack → hardware VTDecompressionSession).
+    /// Pixels out = the whole AV1 decode path is sound. Skipped on devices without AV1 hardware
+    /// (exactly the devices the client never advertises AV1 from).
+    func testHardwareDecodeEndToEnd() throws {
+        try XCTSkipUnless(
+            AV1.hardwareDecodeSupported, "no AV1 hardware decoder — AV1 is never advertised here")
+
+        let box = FrameBox()
+        let decoded = expectation(description: "decoded frame")
+        let decoder = VideoDecoder(
+            onDecoded: { frame in
+                box.lock.lock()
+                box.frame = frame
+                box.lock.unlock()
+                decoded.fulfill()
+            },
+            onDecodeError: { status in
+                box.lock.lock()
+                box.error = status
+                box.lock.unlock()
+                decoded.fulfill()
+            })
+        decoder.setCodec(.av1)
+
+        let format = try XCTUnwrap(AV1.formatDescription(fromKeyframe: Data(Self.keyframeTU)))
+        let au = AccessUnit(
+            data: Data(Self.keyframeTU), ptsNs: 42_000_000, frameIndex: 0, flags: 0, receivedNs: 1)
+        XCTAssertTrue(decoder.decode(au: au, format: format), "hardware session must accept the keyframe")
+        wait(for: [decoded], timeout: 5)
+
+        box.lock.lock()
+        let frame = box.frame
+        let error = box.error
+        box.lock.unlock()
+        XCTAssertNil(error.map { "decode error \($0)" })
+        let ready = try XCTUnwrap(frame)
+        XCTAssertEqual(ready.ptsNs, 42_000_000)
+        XCTAssertFalse(ready.isHDR)
+        XCTAssertEqual(CVPixelBufferGetWidth(ready.pixelBuffer), 320)
+        XCTAssertEqual(CVPixelBufferGetHeight(ready.pixelBuffer), 180)
+        XCTAssertEqual(
+            CVPixelBufferGetPixelFormatType(ready.pixelBuffer),
+            kCVPixelFormatType_420YpCbCr8BiPlanarVideoRange, "SDR AV1 must decode to NV12")
+        decoder.reset()
+    }
+
+    // MARK: - Blobs
+
+    /// Keyframe temporal unit (740 bytes).
+    static let keyframeTU: [UInt8] = [
+        0x12, 0x00, 0x0a, 0x0b, 0x00, 0x00, 0x00, 0x04, 0x3c, 0xfe, 0xcc, 0x4a, 0xf9, 0x00, 0x40, 0x32,
+        0xd2, 0x05, 0x10, 0x00, 0x9b, 0xa0, 0x8f, 0xbe, 0x7d, 0xf0, 0xdf, 0xbc, 0xf8, 0x00, 0xdd, 0x6d,
+        0x69, 0x7f, 0xb3, 0x26, 0x63, 0x5e, 0x79, 0xf4, 0xf5, 0xc5, 0x84, 0xda, 0xcf, 0xec, 0xd8, 0xa6,
+        0xc1, 0x56, 0x99, 0x43, 0xf0, 0xff, 0x31, 0xd5, 0x41, 0xd8, 0xbb, 0x07, 0x10, 0x5e, 0x42, 0xc5,
+        0x9b, 0x63, 0xc0, 0x14, 0xe7, 0x28, 0x73, 0xf3, 0x50, 0x12, 0x02, 0x8e, 0x2b, 0x91, 0xd7, 0x3d,
+        0xc5, 0x33, 0xc9, 0x9b, 0xd9, 0xea, 0xfb, 0xc3, 0x5a, 0xdd, 0xb3, 0x0b, 0x5d, 0xc6, 0xde, 0x1a,
+        0xca, 0x90, 0x61, 0x0a, 0x77, 0x83, 0xb5, 0x8f, 0x9a, 0x88, 0xf0, 0x3d, 0xa2, 0x78, 0x81, 0x6c,
+        0xb6, 0x8e, 0x85, 0x90, 0x44, 0xa1, 0xda, 0xa8, 0xf6, 0xcb, 0xa2, 0xf2, 0xb8, 0xb9, 0xac, 0x6b,
+        0xba, 0xfd, 0x8f, 0x7e, 0x04, 0x32, 0x0d, 0x90, 0xed, 0x5a, 0xe2, 0x1d, 0x8a, 0x03, 0x29, 0x47,
+        0xde, 0xf6, 0x9a, 0xd4, 0x45, 0x91, 0x17, 0x5c, 0x7b, 0xdf, 0xa3, 0xe2, 0x7a, 0xd9, 0x93, 0xfd,
+        0x55, 0xeb, 0xd9, 0x3f, 0xa6, 0xec, 0xdd, 0x2a, 0x00, 0xbc, 0x8d, 0x1d, 0x98, 0xa2, 0x39, 0x88,
+        0x3f, 0x32, 0x3e, 0x18, 0x85, 0x12, 0x46, 0x57, 0x1d, 0x25, 0x8e, 0xcc, 0x41, 0x37, 0xc3, 0x9f,
+        0xbd, 0x7b, 0xf9, 0xb9, 0xa4, 0x9d, 0x86, 0xf4, 0xcc, 0x2b, 0x5a, 0xf3, 0xbc, 0x77, 0x80, 0xcb,
+        0xc4, 0xf3, 0x02, 0x91, 0xf6, 0xb8, 0x59, 0x93, 0x33, 0xbe, 0xe2, 0x23, 0xac, 0xb9, 0xe2, 0x69,
+        0x67, 0xad, 0x63, 0x45, 0x35, 0x94, 0x9e, 0x2e, 0xfa, 0x2b, 0xb9, 0xc3, 0xf9, 0x39, 0x5e, 0xa8,
+        0x33, 0x4d, 0xf3, 0x5c, 0xbd, 0xe6, 0x5b, 0x50, 0x19, 0xe6, 0xd3, 0xf2, 0x01, 0xcf, 0x35, 0x09,
+        0xd6, 0x2a, 0x67, 0x17, 0xd2, 0xbd, 0x91, 0xc3, 0x91, 0x17, 0x4a, 0xbc, 0x29, 0xf0, 0xb8, 0xd4,
+        0xfc, 0x04, 0xac, 0x63, 0xfb, 0x2f, 0xc5, 0xe9, 0xb2, 0x06, 0xac, 0x3c, 0x79, 0x33, 0x5c, 0x73,
+        0x80, 0x95, 0x0f, 0xad, 0xff, 0xee, 0xed, 0x78, 0xaf, 0xc6, 0x1b, 0xb4, 0xc2, 0x96, 0x5f, 0x7f,
+        0x20, 0x5f, 0xb6, 0xdb, 0x70, 0xab, 0x60, 0x0b, 0xea, 0xd1, 0xaf, 0x57, 0x71, 0xeb, 0x3b, 0xef,
+        0xb1, 0x3c, 0x01, 0x72, 0x5b, 0x59, 0x6d, 0x36, 0xe3, 0x16, 0xda, 0x0a, 0x6b, 0xc7, 0x0b, 0xa0,
+        0xa6, 0x6f, 0x77, 0x4f, 0x0b, 0xe6, 0x62, 0x34, 0x0e, 0xdd, 0xfa, 0xbe, 0x4f, 0x67, 0x21, 0x40,
+        0xc2, 0xcd, 0xf3, 0x63, 0x9e, 0xb2, 0x28, 0xaf, 0x5b, 0x0e, 0x28, 0xba, 0x91, 0xec, 0xec, 0xf2,
+        0xf4, 0xdb, 0x9c, 0x51, 0x24, 0x67, 0x77, 0xe0, 0x67, 0x70, 0x51, 0xfb, 0x00, 0x61, 0x50, 0x9f,
+        0xae, 0x5e, 0x96, 0x2d, 0x1e, 0xa2, 0xab, 0x49, 0x90, 0x90, 0x1c, 0x04, 0x93, 0x8b, 0xc2, 0xee,
+        0x53, 0x61, 0x62, 0x19, 0x62, 0x5c, 0xff, 0x15, 0x84, 0x7a, 0x5c, 0x70, 0xaa, 0x6d, 0x39, 0xb2,
+        0xe9, 0x19, 0xd1, 0x9f, 0xf3, 0xb3, 0xb7, 0x05, 0xd2, 0xef, 0x5f, 0xe9, 0x2a, 0x25, 0x55, 0x0a,
+        0xf3, 0xd2, 0x95, 0xba, 0x22, 0x5f, 0x49, 0x9b, 0x5d, 0xae, 0xeb, 0x51, 0x63, 0x51, 0xa0, 0x85,
+        0xd6, 0xb6, 0x23, 0x6f, 0x92, 0xbf, 0x99, 0xf3, 0xf9, 0xbf, 0x07, 0xd4, 0x05, 0x1c, 0x6b, 0xe1,
+        0x42, 0x49, 0xfe, 0x99, 0x4c, 0x6f, 0x34, 0xea, 0x29, 0x14, 0xd5, 0x92, 0x17, 0xfa, 0xc4, 0x35,
+        0xef, 0x97, 0x31, 0x06, 0xdc, 0xc7, 0x57, 0xe7, 0x79, 0x3d, 0x64, 0xf3, 0x12, 0x0d, 0x60, 0x5d,
+        0x9d, 0xa5, 0x11, 0xb9, 0xf9, 0x75, 0x3a, 0x59, 0x42, 0x2a, 0xd0, 0xed, 0xb4, 0xa8, 0xee, 0x87,
+        0x9e, 0x3d, 0x52, 0x47, 0x6c, 0x8f, 0x43, 0x98, 0xd0, 0x72, 0x8b, 0x16, 0xef, 0x2a, 0xaa, 0x9c,
+        0x42, 0x91, 0xc8, 0x92, 0x85, 0x79, 0xc0, 0xf8, 0xc0, 0x12, 0x44, 0x38, 0x49, 0xdb, 0x5f, 0xfc,
+        0x7b, 0x6e, 0xac, 0xea, 0x38, 0x3c, 0x3f, 0x49, 0xc2, 0xe7, 0x82, 0xb3, 0x30, 0xf2, 0x7e, 0x31,
+        0xc2, 0xf8, 0xfc, 0x9a, 0x9e, 0x6d, 0x4c, 0x5f, 0xd4, 0xc0, 0x22, 0xd3, 0x40, 0xc9, 0x66, 0x59,
+        0x38, 0x14, 0x64, 0x24, 0xc0, 0x0d, 0x56, 0x88, 0x6d, 0x9f, 0x80, 0x71, 0xc8, 0x26, 0x3e, 0x2f,
+        0xd1, 0xd2, 0x6d, 0x8a, 0xf2, 0x2c, 0x01, 0xbf, 0x89, 0x15, 0xc7, 0x66, 0x3d, 0x19, 0x9f, 0xb8,
+        0x4c, 0xb9, 0x6f, 0xd7, 0xe8, 0x59, 0xf3, 0xe7, 0xdd, 0x14, 0x3e, 0x99, 0x37, 0x90, 0xb5, 0x2d,
+        0x49, 0xcc, 0x40, 0xd6, 0xe1, 0x29, 0x4e, 0x31, 0x7c, 0xef, 0xdb, 0x74, 0xf0, 0x9f, 0xa6, 0xdd,
+        0xbc, 0xd9, 0x65, 0x0f, 0xf7, 0x22, 0xa8, 0xd0, 0xfb, 0x78, 0x49, 0x40, 0xbf, 0x96, 0xa1, 0x5a,
+        0x7b, 0xc6, 0x60, 0x63, 0x22, 0xad, 0x5d, 0x97, 0xa2, 0x77, 0x3f, 0x58, 0x3b, 0x94, 0xa4, 0xd9,
+        0xe3, 0xe5, 0xae, 0x0c, 0x30, 0x91, 0xdd, 0x5a, 0xbb, 0xfd, 0x10, 0x6a, 0x22, 0x8f, 0xbd, 0x8c,
+        0x41, 0xf5, 0xa2, 0x29, 0xd7, 0xad, 0x4e, 0x58, 0xfb, 0x1e, 0x9a, 0x0e, 0x98, 0x54, 0xc1, 0xd7,
+        0xfb, 0xdf, 0xcc, 0x1d, 0x5d, 0xe3, 0x25, 0x6b, 0x57, 0x69, 0x67, 0x80, 0x0c, 0xb5, 0xcb, 0x01,
+        0x5a, 0x56, 0x56, 0x01, 0x47, 0xad, 0x6b, 0x26, 0x28, 0x30, 0x36, 0x79, 0x91, 0x62, 0x52, 0x93,
+        0xa4, 0xe8, 0x52, 0x30,
+    ]
+
+    /// Delta temporal unit (27 bytes).
+    static let deltaTU: [UInt8] = [
+        0x12, 0x00, 0x32, 0x17, 0x30, 0x02, 0x04, 0x09, 0x24, 0x92, 0x22, 0x7f, 0x80, 0x00, 0x01, 0x9f,
+        0x00, 0x00, 0x00, 0x8b, 0x07, 0x27, 0x7a, 0x64, 0x4c, 0xec, 0xf4,
+    ]
+}

clients/decky/README.md

@@ -43,10 +43,12 @@ read-only, so the flatpak (which bundles libadwaita/SDL3) is the canonical clien
 **Install Plugin from URL**, paste:
 
 ```
-https://git.unom.io/api/packages/unom/generic/punktfunk-decky/latest/punktfunk.zip
+https://unom.io/pf-decky
 ```
 
-(or a pinned `.../punktfunk-decky/<version>/punktfunk.zip`). The plugin then **self-updates** without
+(short link for `https://git.unom.io/api/packages/unom/generic/punktfunk-decky/latest/punktfunk.zip`;
+for a pinned version use `https://git.unom.io/api/packages/unom/generic/punktfunk-decky/<version>/punktfunk.zip`
+directly). The plugin then **self-updates** without
 the Decky store — when a newer build exists, an **Update** button appears and drives Decky
 Loader's own (SHA-256-verified) install. Installs and updates can take a couple of minutes on some
 networks: Decky's installer also contacts its plugin store first, which may be slow or blackholed

clients/decky/main.py

@@ -104,7 +104,7 @@ def _parse_library_tsv(stdout: str) -> list[dict]:
 def _classify_library_error(stderr: str) -> str:
     """Map the client's ``library: <LibraryError Display>`` stderr line to a stable error
     code for the UI. Substring-matched against the Display strings in
-    ``clients/linux/src/library.rs`` — a wording change degrades to ``client-error``
+    ``crates/pf-client-core/src/library.rs`` — a wording change degrades to ``client-error``
     (generic copy), never a crash."""
     s = stderr.lower()
     if "didn't recognize this device" in s:
@@ -300,6 +300,98 @@ async def _flatpak_capture(args: list[str], timeout: float = 20.0) -> tuple[int,
         return -1, ""
 
 
+async def _run_client(client_args: list[str], timeout: float = 20.0) -> tuple[int, str, str]:
+    """Run the flatpak CLIENT headlessly (``flatpak run … io.unom.Punktfunk <client_args>``) with
+    the user-session env, returning ``(returncode, stdout, stderr)`` with SEPARATE pipes so a JSON
+    payload on stdout stays clean of the client's log lines on stderr. ``(-1, "", "")`` when
+    flatpak is missing or the call errors/times out. This is the single entry point for the
+    headless host-store modes (``--list-hosts`` / ``--add-host`` / ``--set-host`` /
+    ``--forget-host`` / ``--reset`` / ``--reachable``), which mutate the SAME
+    ``client-known-hosts.json`` the desktop client reads — so state is shared, not duplicated."""
+    flatpak = _flatpak()
+    if not flatpak:
+        return -1, "", ""
+    argv = [flatpak, "run", "--arch=x86_64", APP_ID, *client_args]
+    proc = None
+    try:
+        proc = await asyncio.create_subprocess_exec(
+            *argv,
+            stdout=asyncio.subprocess.PIPE, stderr=asyncio.subprocess.PIPE,
+            env=_flatpak_env(),
+        )
+        out, err = await asyncio.wait_for(proc.communicate(), timeout=timeout)
+        rc = proc.returncode if proc.returncode is not None else -1
+        return (
+            rc,
+            (out or b"").decode("utf-8", "replace"),
+            (err or b"").decode("utf-8", "replace"),
+        )
+    except asyncio.TimeoutError:
+        decky.logger.warning("client %s timed out", " ".join(client_args))
+        if proc:
+            try:
+                proc.kill()
+            except ProcessLookupError:
+                pass
+        return -1, "", ""
+    except Exception:  # noqa: BLE001
+        decky.logger.exception("client %s failed", " ".join(client_args))
+        return -1, "", ""
+
+
+# The QAM panel and the full page each mount their own hosts view, and Gaming Mode remounts the
+# QAM often — every mount calls list_hosts, which spawns a flatpak cold-start plus a reachability
+# probe. Cache the last result briefly so back-to-back opens reuse it instead of re-probing; any
+# mutation (add/edit/forget/reset/pair) invalidates it so a change shows up immediately.
+_HOSTS_TTL_S = 12.0
+_hosts_cache: dict = {"at": 0.0, "probed": None, "data": None}
+
+
+def _invalidate_hosts_cache() -> None:
+    _hosts_cache["data"] = None
+
+
+def _read_known_hosts() -> list[dict]:
+    """The saved-hosts store read straight off disk — the fallback for a client too old to have
+    ``--list-hosts``. Same file the desktop client owns; `online` is left ``None`` (unknown)
+    because a direct read has no reachability signal."""
+    try:
+        data = json.loads((_client_config_dir() / "client-known-hosts.json").read_text())
+    except (OSError, json.JSONDecodeError):
+        return []
+    hosts = data.get("hosts", []) if isinstance(data, dict) else []
+    out: list[dict] = []
+    for h in hosts:
+        if not isinstance(h, dict) or not h.get("addr"):
+            continue
+        out.append({
+            "name": str(h.get("name") or h.get("addr", "")),
+            "addr": str(h.get("addr", "")),
+            "port": int(h.get("port", 9777) or 9777),
+            "fp_hex": str(h.get("fp_hex", "")),
+            "paired": bool(h.get("paired", False)),
+            "mac": h.get("mac") if isinstance(h.get("mac"), list) else [],
+            "last_used": h.get("last_used"),
+            "online": None,
+        })
+    return out
+
+
+def _mutation_result(rc: int, err: str, op: str) -> dict:
+    """Map a headless host-store mutation's exit status to a UI-stable result. ``rc == -1`` means
+    the flatpak call never ran (missing/timed out); a nonzero rc from a client that PREDATES the
+    mode falls through to GTK init and fails headless — classified ``client-outdated`` so the UI
+    can prompt an update instead of showing a cryptic error."""
+    if rc == 0:
+        return {"ok": True}
+    if rc == -1:
+        return {"ok": False, "error": "client-unavailable"}
+    code = _classify_library_error(err)
+    detail = (err.strip().splitlines() or [f"{op} failed"])[-1]
+    decky.logger.warning("%s failed (rc=%s): %s", op, rc, detail)
+    return {"ok": False, "error": code, "detail": detail}
+
+
 def _field_from(text: str, name: str) -> str:
     """Pull ``<name>: value`` out of ``flatpak info`` / ``remote-info`` output (e.g. ``Commit``,
     ``Origin``)."""
@@ -483,6 +575,7 @@ class Plugin:
                 if tok.startswith("fp="):
                     fp = tok[3:]
             decky.logger.info("paired %s:%s", host, port)
+            _invalidate_hosts_cache()  # the store gained a paired entry — reflect it next list
             return {"ok": True, "fp": fp}
         decky.logger.warning("pairing failed (rc=%s): %s", proc.returncode, err.strip() or out.strip())
         # Surface the client's own one-line reason (wrong PIN / not armed) to the UI.
@@ -669,7 +762,7 @@ class Plugin:
             # The client's own defaults (native display, host-default bitrate, auto pad).
             return {
                 "width": 0, "height": 0, "refresh_hz": 0, "bitrate_kbps": 0,
-                "gamepad": "auto", "compositor": "auto",
+                "codec": "auto", "gamepad": "auto", "compositor": "auto",
                 "inhibit_shortcuts": True, "mic_enabled": False,
             }
 
@@ -684,6 +777,125 @@ class Plugin:
             decky.logger.exception("could not write settings")
             return {"ok": False, "error": str(exc)}
 
+    # ---- Shared known-hosts store (the SAME file the desktop client reads/writes) ----
+
+    async def list_hosts(self, probe: bool = True) -> dict:
+        """The saved-hosts store as a list — the SAME ``client-known-hosts.json`` the desktop
+        client owns, so a host added/renamed/paired in either surface shows in both. With
+        ``probe`` each host carries a live ``online`` bool from a mDNS-INDEPENDENT reachability
+        probe (a Tailscale/VPN host is no longer shown offline just because it doesn't advertise);
+        ``online`` is ``None`` when reachability is unknown. Prefers the client's ``--list-hosts``
+        mode; falls back to reading the JSON directly when the installed client predates it."""
+        now = time.monotonic()
+        cache = _hosts_cache
+        if (
+            cache["data"] is not None
+            and cache["probed"] == bool(probe)
+            and (now - cache["at"]) < _HOSTS_TTL_S
+        ):
+            return cache["data"]
+
+        args = ["--list-hosts"] + (["--probe"] if probe else [])
+        rc, out, err = await _run_client(args, timeout=30.0)
+        result: dict | None = None
+        if rc == 0:
+            try:
+                data = json.loads(out)
+                hosts = data.get("hosts", []) if isinstance(data, dict) else []
+                result = {"ok": True, "hosts": hosts, "probed": bool(probe)}
+            except json.JSONDecodeError:
+                decky.logger.warning("list-hosts: unparseable output: %s", out[:200])
+        elif rc != -1:
+            decky.logger.info(
+                "list-hosts unavailable (%s); reading store directly",
+                _classify_library_error(err),
+            )
+        if result is None:
+            # Fallback: read the store off disk (old client / no --list-hosts) — no reachability.
+            result = {"ok": True, "hosts": _read_known_hosts(), "probed": False, "fallback": True}
+        cache.update(at=now, probed=bool(probe), data=result)
+        return result
+
+    async def add_host(self, target: str, name: str = "", fp: str = "") -> dict:
+        """Save a host by address so it can be paired/streamed even when mDNS never sees it (a
+        Tailscale/VPN box). Without ``fp`` it's an unpaired placeholder the user pairs next; a
+        later pair replaces it with the fingerprinted entry. Returns ``{ok, error?, detail?}``."""
+        args = ["--add-host", target.strip()]
+        if name.strip():
+            args += ["--host-label", name.strip()]
+        if fp.strip():
+            args += ["--fp", fp.strip()]
+        rc, _out, err = await _run_client(args, timeout=20.0)
+        _invalidate_hosts_cache()
+        return _mutation_result(rc, err, "add-host")
+
+    async def edit_host(
+        self, selector: str, name: str = "", addr: str = "", port: int = 0
+    ) -> dict:
+        """Edit a saved host — rename and/or re-point its address. ``selector`` is the host's
+        cert fingerprint (survives IP changes) or its current ``addr[:port]``. Empty fields are
+        left untouched. Returns ``{ok, error?, detail?}``."""
+        args = ["--set-host", selector]
+        if name.strip():
+            args += ["--host-label", name.strip()]
+        if addr.strip():
+            args += ["--addr", addr.strip()]
+        if port:
+            args += ["--port", str(int(port))]
+        rc, _out, err = await _run_client(args, timeout=20.0)
+        _invalidate_hosts_cache()
+        return _mutation_result(rc, err, "set-host")
+
+    async def forget_host(self, selector: str) -> dict:
+        """Remove a saved host (by fingerprint or ``addr[:port]``) — drops the pinned
+        fingerprint, so a later connect must re-pair/trust. Idempotent."""
+        rc, _out, err = await _run_client(["--forget-host", selector], timeout=20.0)
+        _invalidate_hosts_cache()
+        return _mutation_result(rc, err, "forget-host")
+
+    async def reset_config(self) -> dict:
+        """Reset this device's Punktfunk state: saved hosts, stream settings, and the plugin's
+        pinned games. The client's persistent IDENTITY (client-cert/key.pem) is KEPT so the box
+        isn't seen as brand-new everywhere (re-pairing re-adds hosts). Prefers the client's
+        ``--reset``; if that's unavailable (old client / no flatpak) it clears the shared JSON
+        stores directly. The plugin-owned pins file is always cleared here (``--reset`` never
+        touches it)."""
+        rc, _out, _err = await _run_client(["--reset"], timeout=20.0)
+        _invalidate_hosts_cache()
+        errors: list[str] = []
+        if rc != 0:
+            decky.logger.info("reset: --reset unavailable (rc=%s); clearing stores directly", rc)
+            for name in ("client-known-hosts.json", "client-gtk-settings.json"):
+                try:
+                    (_client_config_dir() / name).unlink()
+                except FileNotFoundError:
+                    pass
+                except OSError as exc:
+                    errors.append(f"{name}: {exc}")
+        try:
+            _pins_path().unlink()  # plugin-owned; the client's --reset leaves it alone
+        except FileNotFoundError:
+            pass
+        except OSError as exc:
+            errors.append(f"pins: {exc}")
+        if errors:
+            return {"ok": False, "error": "; ".join(errors)}
+        return {"ok": True}
+
+    async def probe_host(self, target: str) -> dict:
+        """Reachability of one ``host[:port]`` via the client's mDNS-independent QUIC probe —
+        for a "test this address" check. ``{ok: True, online: bool}`` when determined, else
+        ``{ok: False, error}`` (flatpak missing / client too old)."""
+        rc, _out, err = await _run_client(["--reachable", target.strip()], timeout=8.0)
+        if rc == 0:
+            return {"ok": True, "online": True}
+        if rc == 1:
+            return {"ok": True, "online": False}
+        return {
+            "ok": False,
+            "error": _classify_library_error(err) if err.strip() else "client-unavailable",
+        }
+
     async def kill_stream(self) -> dict:
         """Force-stop a wedged stream client (``flatpak kill``)."""
         flatpak = _flatpak()

clients/decky/src/backend.ts

@@ -54,6 +54,38 @@ export interface PairResult {
   error?: string;
 }
 
+// A host in the SHARED saved-hosts store (client-known-hosts.json) — the same file the desktop
+// client reads/writes, so add/rename/pair in either surface shows up in both. `online` comes
+// from a mDNS-INDEPENDENT reachability probe (a Tailscale/VPN host isn't shown offline just
+// because it doesn't advertise); `null` means reachability is unknown (probe skipped or a client
+// too old for `--list-hosts`, which then also can't probe).
+export interface SavedHost {
+  name: string;
+  addr: string;
+  port: number;
+  fp_hex: string; // host cert fingerprint (lowercase hex); "" for a not-yet-paired manual entry
+  paired: boolean;
+  mac: string[];
+  last_used: number | null;
+  online: boolean | null;
+}
+
+export interface HostsResult {
+  ok: boolean;
+  hosts: SavedHost[];
+  probed: boolean;
+  fallback?: boolean; // true when read straight off disk (client too old for --list-hosts)
+}
+
+// The result of a host-store mutation (add/edit/forget). `error` is a stable code:
+// "client-unavailable" (flatpak missing) | "client-outdated" (client predates the mode) |
+// "unreachable"/"http"/… (from the client) | "client-error" (generic; see `detail`).
+export interface MutationResult {
+  ok: boolean;
+  error?: string;
+  detail?: string;
+}
+
 export interface RunnerInfo {
   runner: string; // absolute path to bin/punktfunkrun.sh
   app_id: string; // flatpak app id
@@ -61,13 +93,14 @@ export interface RunnerInfo {
 }
 
 // The slice of the flatpak client's settings JSON this UI surfaces. The file can hold more
-// keys (codec, decoder, … set from the desktop client's own UI) — they round-trip untouched
+// keys (decoder, … set from the desktop client's own UI) — they round-trip untouched
 // because get_settings returns the whole parsed file and patches are object spreads.
 export interface StreamSettings {
   width: number; // 0 = native
   height: number; // 0 = native
   refresh_hz: number; // 0 = native
   bitrate_kbps: number; // 0 = host default
+  codec?: string; // "auto" | "hevc" | "h264" | "av1" — soft preference (absent in pre-codec files)
   gamepad: string; // "auto" | "xbox360" | "xboxone" | "dualsense" | "dualshock4" | "steamdeck"
   compositor: string; // "auto" | "kwin" | "wlroots" | "mutter" | "gamescope"
   inhibit_shortcuts: boolean;
@@ -128,6 +161,32 @@ export const killStream = callable<[], { ok: boolean }>("kill_stream");
 export const wake = callable<[host: string, port: number], { ok: boolean; error?: string }>(
   "wake",
 );
+// ---- Shared saved-hosts store (the SAME client-known-hosts.json the desktop client owns) ----
+// The saved hosts, each annotated with a live (mDNS-independent) `online` probe when `probe` is
+// true. Falls back to a direct JSON read (no reachability) on a client too old for --list-hosts.
+export const listHosts = callable<[probe: boolean], HostsResult>("list_hosts");
+// Save a host by address (survives mDNS-blind networks). `fp` empty = unpaired placeholder to
+// pair next; a later pair replaces it with the fingerprinted entry.
+export const addHost = callable<[target: string, name: string, fp: string], MutationResult>(
+  "add_host",
+);
+// Rename and/or re-point a saved host. `selector` = its fingerprint (survives IP change) or
+// current addr[:port]; empty fields are left untouched.
+export const editHost = callable<
+  [selector: string, name: string, addr: string, port: number],
+  MutationResult
+>("edit_host");
+// Remove a saved host by fingerprint or addr[:port] (idempotent).
+export const forgetHost = callable<[selector: string], MutationResult>("forget_host");
+// Reset this device's Punktfunk state (saved hosts + stream settings + pins); KEEPS the client
+// identity so the box isn't seen as new everywhere (re-pairing re-adds hosts).
+export const resetConfig = callable<[], { ok: boolean; error?: string }>("reset_config");
+// Reachability of one host[:port] via the client's mDNS-independent QUIC probe (a "test address"
+// check). `{ ok: true, online }` when determined, else `{ ok: false, error }`.
+export const probeHost = callable<
+  [target: string],
+  { ok: boolean; online?: boolean; error?: string }
+>("probe_host");
 export const checkUpdate = callable<[force: boolean], UpdateInfo>("check_update");
 // Update the flatpak client in the user installation (`flatpak update --user -y io.unom.Punktfunk`).
 export const updateClient = callable<