enricobuehler
826da9968e
The missing zero-copy path is closed. NVIDIA's EGL won't sample LINEAR and the CUDA driver rejects raw dmabuf fds — but Vulkan imports dmabufs (VK_EXT_external_memory_dma_buf) and exports OPAQUE_FD memory that CUDA officially imports. zerocopy/vulkan.rs (ash): dmabuf fd → VkBuffer (import cached per fd) → vkCmdCopyBuffer (GPU) → exportable VkBuffer → vkGetMemoryFdKHR(OPAQUE_FD) → cuImportExternalMemory → CUdeviceptr The exportable buffer + CUDA mapping are per-resolution; per frame it's one GPU buffer copy (fence-waited) + one pitched CUDA copy into the encoder's pool. No CPU touches pixels. EglImporter::import_linear now routes through the bridge (lazy init; any failure still falls back to the CPU mmap path). cuda::ExternalDmabuf gained import_owned_fd for the Vulkan-exported fd. Validated live: gamescope 720p120 → "Vulkan→CUDA exportable staging buffer ready size=3686400" (exactly 1280*720*4), full-rate 122.7 fps, decoded frame pixel-correct (vkcube). KWin's tiled EGL path regression-tested intact. NV12 negotiation dropped — moot now that BGRx is fully zero-copy. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
77 lines
3.6 KiB
TOML
77 lines
3.6 KiB
TOML
[package]
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name = "lumen-host"
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description = "lumen Linux streaming host: virtual display, capture, encode, input injection"
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version.workspace = true
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edition.workspace = true
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rust-version.workspace = true
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license.workspace = true
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authors.workspace = true
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repository.workspace = true
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[dependencies]
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lumen-core = { path = "../lumen-core" }
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anyhow = "1"
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tracing = "0.1"
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tracing-subscriber = { version = "0.3", features = ["env-filter"] }
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axum = "0.8"
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mdns-sd = "0.20"
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tokio = { version = "1", features = ["full"] }
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rsa = "0.9"
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sha2 = { version = "0.10", features = ["oid"] }
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aes = "0.8"
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aes-gcm = "0.10"
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cbc = { version = "0.1", features = ["alloc"] }
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rand = "0.8"
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hex = "0.4"
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rcgen = { version = "0.13", default-features = false, features = ["aws_lc_rs", "pem"] }
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x509-parser = "0.16"
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axum-server = { version = "0.7", features = ["tls-rustls"] }
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rustls = "0.23"
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rustls-pemfile = "2"
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rusty_enet = "0.4"
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[target.'cfg(target_os = "linux")'.dependencies]
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# `screencast` gates the ScreenCast portal module; `remote_desktop` adds the RemoteDesktop
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# portal we use for libei input on KWin/GNOME; `tokio` is the default runtime.
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# `open_pipe_wire_remote` is unconditional, so ashpd's own `pipewire` feature is not
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# needed — we drive PipeWire with the `pipewire` crate below.
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ashpd = { version = "0.13", features = ["screencast", "remote_desktop"] }
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ffmpeg-next = "8"
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libc = "0.2"
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# Must match the pipewire crate ashpd 0.13 links (libspa/pipewire-sys `links` key is
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# unique per build), i.e. 0.9 — NOT the 0.10 the setup doc mentions.
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pipewire = "0.9"
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# ashpd 0.13 uses the tokio runtime; a current-thread runtime drives the one-time
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# portal handshake (control plane — never the per-frame path).
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tokio = { version = "1", features = ["rt", "rt-multi-thread", "net", "time"] }
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# Input injection into headless Sway via the wlroots virtual-input Wayland protocols
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# (uinput won't reach a compositor running with WLR_LIBINPUT_NO_DEVICES=1).
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wayland-client = "0.31"
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wayland-protocols-wlr = { version = "0.3", features = ["client"] }
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wayland-protocols-misc = { version = "0.3", features = ["client"] }
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# Codegen for KDE's `zkde_screencast_unstable_v1` (vendored in `protocols/`): create a KWin
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# virtual output sized to the client's resolution and get its PipeWire node (KRdp's path).
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# `wayland-backend` is referenced by the generated interface tables.
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wayland-scanner = "0.31"
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wayland-backend = "0.3"
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# Parse `pw-dump` JSON to find gamescope's PipeWire node (gamescope backend).
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serde_json = "1"
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# Builds/validates the xkb keymap uploaded to the virtual keyboard + tracks modifier state.
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xkbcommon = "0.8"
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# Opus encode for the GameStream audio stream (links system libopus).
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opus = "0.3"
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# libei (EI sender) for the portable input path on KWin/GNOME (RemoteDesktop portal).
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# The `tokio` feature wires reis's event stream into tokio's reactor.
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reis = { version = "0.6.1", features = ["tokio"] }
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# `StreamExt::next` on reis's tokio event stream in the libei worker loop.
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futures-util = "0.3"
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# Zero-copy capture (plan §9): EGL imports the PipeWire dmabuf, CUDA maps it, NVENC encodes
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# it with no CPU roundtrip. `khronos-egl` (dynamic = load the NVIDIA libEGL at runtime) gives
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# eglCreateImage + the dma_buf import; the CUDA driver API (EGL interop) and libgbm are linked
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# via hand-rolled FFI in `src/zerocopy/` (no Rust crate exposes the EGL-interop driver calls).
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khronos-egl = { version = "6", features = ["dynamic"] }
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# Vulkan bridge for LINEAR dmabufs (gamescope): import via VK_EXT_external_memory_dma_buf,
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# GPU-copy into an exportable allocation, export OPAQUE_FD → cuImportExternalMemory (the
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# officially-supported CUDA pairing; raw dmabuf fds are rejected by the desktop driver).
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ash = "0.38"
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