enricobuehlerandClaude Opus 5
b1ac4d02de
WP4 + WP5 of design/desktop-presentation-rebuild.md, on top of the WP1/WP2 engine. The engine shipped with no way to choose it and no way to see what it cost; this closes both. WP4 — the display stage splits into `pace` (decoded → present-submit, our own pipeline) + `latch` (submit → on-glass, the presentation queue and the vblank wait), off the `submitted_ns` stamp WP2 already carried. That split is what makes a high `display` self-diagnosing: latch dominating is the vsync floor or a standing queue, pace dominating is us. A `present:` line joins the Detailed tier naming the live swapchain mode — the answer to most "why is my latch a whole refresh" questions, since a MAILBOX request silently lands on FIFO wherever the driver has no mailbox — plus the engine's counters, rendered only when they are non-zero so a healthy latency session shows just the mode. Deviation from the plan: the planned `display_adj` twin is NOT here. It was specified as `display − latch_p50` for parity with the Apple HUD's shaved figure, but with a real per-sample `pace` percentile that twin is the same quantity derived worse (subtracting percentiles). `pace` IS the Apple-comparable number — Apple subtracts its OS present floor, the latch is ours — and the user docs now say exactly that. WP5 — Prioritize + Smoothness buffer on all three surfaces: the GTK dialog (a new Presentation group on the Display page), the WinUI settings page, and the console settings screen, which is the ONLY editor reachable in Gaming Mode and so the one that decides whether Deck users can reach this at all. The buffer control follows the intent the way echo cancellation follows the mic: hidden on the desktop shells, dimmed and inert on the console, where a row that vanished mid-list would shift everything under the cursor. The V-Sync and VRR rows are deliberately NOT here. Their settings exist and are profile-routed, but the swapchain does not honour them until WP3, and a toggle that does nothing is exactly how "Full chroma (4:4:4)" shipped inert on desktop for three releases after being announced. Buffer labels carry no millisecond hints (Apple/Android derive them from the session refresh): under a Native mode the shells do not know the refresh at settings time, so the captions state the cost as one refresh per frame rather than a confident wrong number. Docs: the stats page documents the split and the `present:` line, and stops claiming Linux/Windows measure to the present instant (untrue since present_wait); client-settings documents both new rows and drops the stale claim that the desktop 4:4:4 toggle has no effect (it was wired to VIDEO_CAP_444); configuration documents PUNKTFUNK_PRESENTER and PUNKTFUNK_PRESENT_DEBUG. Gates: punktfunk-rust-ci linux/amd64 — fmt, clippy -D warnings over pf-client-core, pf-presenter, pf-console-ui, the session binary and the GTK client, 158 tests. The WinUI leg cannot be reached by any Linux or macOS check, so it was compiled on the Windows runner .133: clippy -D warnings and tests both exit 0, against a tree proven by content to contain the edit. ⚠ The first run there reported a false pass — the script printed its done-marker while the log carried a test failure (a STATUS_DLL_NOT_FOUND launch failure, ffmpeg's DLLs missing from PATH); the harness now echoes each phase's exit code so the verdict is a fact in the log rather than an inference from a marker. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
punktfunk — Windows client
The native Windows app for streaming a punktfunk host to your PC. A modern WinUI 3 app that discovers hosts on your network, pairs with a PIN, and streams at your display's own resolution and refresh rate — with a hardware-accelerated D3D11 video path and HDR.
It's pure Rust: the UI is WinUI 3 driven through windows-reactor
(a declarative, React-like framework), and it links the shared punktfunk-core directly to speak
the fast punktfunk/1 protocol.
Features
- Hardware decode, GPU present — FFmpeg HEVC with a D3D11VA zero-copy path (decoder and
presenter share one D3D11 device; NV12/P010 textures sampled straight into a
SwapChainPanelcomposition swapchain), with a robust software-decode fallback. - HDR10 — advertise 10-bit/HDR, detect PQ in-band, and flip the swapchain to
R10G10B10A2+ ST.2084 with HDR10 metadata. - Your display's native mode — the host builds a virtual display at exactly your WxH@Hz.
- Audio both ways — WASAPI render + mic capture.
- Full controller support — SDL3 gamepads with rumble, lightbar, and DualSense feedback.
- Your display's native mode, really — "Native display" resolves the actual size + refresh of the monitor the window is on at connect time.
- Find hosts automatically — mDNS discovery lists hosts on your LAN, alongside saved and manual entries. First connect does a one-time SPAKE2 PIN pairing (or TOFU on trusted LANs), then reconnects on a pinned identity. Saved hosts carry per-host actions: a network speed test (probe burst over the real data plane → recommended bitrate, applied in one tap) and forget.
- Polished shell — host cards, settings (resolution / refresh / host compositor / decoder / codec / bitrate / HDR / forwarded controller / gamepad type / system shortcuts / audio channels / mic / stats-overlay level), the tiered stats overlay (Off / Compact / Normal / Detailed — Ctrl+Alt+Shift+S cycles it live in the session window), and the full trust surface. Stream input uses Win32 low-level hooks with Moonlight-style capture: Ctrl+Alt+Shift+Q releases the pointer, a click on the stream re-captures it, and system shortcuts (Alt+Tab, Win, …) can act locally or forward to the host.
Builds and ships for both x64 and ARM64 as a signed MSIX.
Get it
Install the signed MSIX from the package registry — see docs.punktfunk.unom.io/docs/install-client. A stock Moonlight client also works over GameStream if you prefer.
Build from source
Windows-only (the crate builds as a stub on other platforms so the workspace stays green). You need
the MSVC toolchain, an FFMPEG_DIR FFmpeg tree, and CMake (SDL3 builds from source). The Windows
App SDK runtime bootstrap is staged next to the exe by windows-reactor-setup from this crate's
own build.rs — no extra environment needed.
cargo build -p punktfunk-client-windows --target x86_64-pc-windows-msvc
# CLI paths for testing (no window):
punktfunk-client --discover # list hosts on the LAN
punktfunk-client --headless --connect host[:port] [--pin HEX] # connect, count frames, print stats
punktfunk-client --headless --speed-test --connect host[:port] # probe burst → recommended bitrate
CARGO_HOMEmust be an ASCII path — non-ASCII characters break SDL3's MSVC precompiled-header build. Packaging (MSIX manifest, signing) lives inpackaging/.
Layout
Decode/present/input live in the spawned punktfunk-session binary (clients/session), not here —
this crate is the shell that discovers, pairs, and launches it.
src/
main.rs entry point + CLI paths (--discover · --headless · --speed-test)
bin/punktfunk-console.rs the couch/HTPC Start-menu entry (re-execs with --console)
app/ WinUI 3 shell (windows-reactor), one module per screen:
mod (root/router) · hosts · connect · pair · speed · settings ·
library · help · licenses · stream · style (shared cards/pills)
deeplink.rs punktfunk:// activation, single-instance hand-off, shortcut writer
spawn.rs punktfunk-session child process + its stdout event contract
shell_window.rs hide/restore the shell HWND around a session
gpu.rs DXGI adapter enumeration for the GPU picker
trust.rs · discovery.rs persistent identity, TOFU/PIN pairing, mDNS browse
probe.rs · wol.rs speed probe · Wake-on-LAN
logfile.rs log tee to %LOCALAPPDATA%
packaging/ MSIX manifest, signing, pack script
Manual smoke checklist
The windows-reactor pin is a moving target and WinUI regressions rarely show up in cargo check —
walk this after a reactor bump or a change to the render/state architecture:
- Hosts — discovery populates tiles; tile hover fill; "…" menu → Forget and Rename; add-host modal connects; WOL wait screen cancels.
- Settings — every section renders; combos still show their selection after a section switch AND a scope switch (the historic blank-combo reconciler bug); profile create / rename / delete (with confirm); colour swatches repaint; the Overridden marker appears on edit and clears on Reset; GPU combo lists adapters.
- Pair — PIN entry pairs (the typed PIN must reach the Connect click —
use_refmirror path). - Session — connect → session spawns → HUD stats tick; Ctrl+Alt+Shift+Q releases the pointer; shell window restores on exit.
- Shell — speed test completes; library grid loads;
punktfunk://deep link routes (second instance hands off and exits); window icon appears; screen-entrance animations play.
Related
- Documentation — quick start, pairing, troubleshooting
- Project README — the host, the other clients, and how it all fits together