feat(nodes): add HW video codec backends (Vulkan Video H.264, VA-API AV1, NVENC/NVDEC AV1)#279
feat(nodes): add HW video codec backends (Vulkan Video H.264, VA-API AV1, NVENC/NVDEC AV1)#279staging-devin-ai-integration[bot] wants to merge 70 commits intomainfrom
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| let encode_task = tokio::task::spawn_blocking(move || { | ||
| // Encoder and device are lazily initialised on the first frame | ||
| // so we know the actual resolution. | ||
| let mut encoder: Option<vk_video::BytesEncoder> = None; | ||
| let mut device: Option<Arc<vk_video::VulkanDevice>> = None; | ||
| let mut current_dimensions: Option<(u32, u32)> = None; | ||
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| while let Some((frame, metadata)) = encode_rx.blocking_recv() { | ||
| if result_tx.is_closed() { | ||
| return; | ||
| } | ||
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| let dims = (frame.width, frame.height); | ||
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| // (Re-)create encoder when dimensions change. | ||
| if current_dimensions != Some(dims) { | ||
| tracing::info!( | ||
| "VulkanVideoH264EncoderNode: (re)creating encoder for {}×{}", | ||
| dims.0, | ||
| dims.1, | ||
| ); | ||
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| let dev = match init_vulkan_encode_device(device.as_ref()) { | ||
| Ok(d) => d, | ||
| Err(err) => { | ||
| let _ = result_tx.blocking_send(Err(err)); | ||
| return; | ||
| }, | ||
| }; | ||
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| let max_bitrate = u64::from( | ||
| config.max_bitrate.unwrap_or_else(|| config.bitrate.saturating_mul(4)), | ||
| ); | ||
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| let output_params = match dev.encoder_output_parameters_high_quality( | ||
| vk_video::parameters::RateControl::VariableBitrate { | ||
| average_bitrate: u64::from(config.bitrate), | ||
| max_bitrate, | ||
| virtual_buffer_size: Duration::from_secs(2), | ||
| }, | ||
| ) { | ||
| Ok(p) => p, | ||
| Err(err) => { | ||
| let _ = result_tx.blocking_send(Err(format!( | ||
| "failed to get encoder output parameters: {err}" | ||
| ))); | ||
| return; | ||
| }, | ||
| }; | ||
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| let width = NonZeroU32::new(dims.0).unwrap_or(NonZeroU32::MIN); | ||
| let height = NonZeroU32::new(dims.1).unwrap_or(NonZeroU32::MIN); | ||
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| let enc = | ||
| match dev.create_bytes_encoder(vk_video::parameters::EncoderParameters { | ||
| input_parameters: vk_video::parameters::VideoParameters { | ||
| width, | ||
| height, | ||
| target_framerate: config.framerate.into(), | ||
| }, | ||
| output_parameters: output_params, | ||
| }) { | ||
| Ok(e) => e, | ||
| Err(err) => { | ||
| let _ = result_tx.blocking_send(Err(format!( | ||
| "failed to create BytesEncoder: {err}" | ||
| ))); | ||
| return; | ||
| }, | ||
| }; | ||
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| device = Some(dev); | ||
| encoder = Some(enc); | ||
| current_dimensions = Some(dims); | ||
| } | ||
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| let Some(enc) = encoder.as_mut() else { | ||
| let _ = result_tx.blocking_send(Err("encoder not initialised".to_string())); | ||
| return; | ||
| }; | ||
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| // Convert I420 → NV12 if necessary. | ||
| let nv12_data = match frame.pixel_format { | ||
| PixelFormat::Nv12 => frame.data.as_slice().to_vec(), | ||
| PixelFormat::I420 => i420_to_nv12(&frame), | ||
| other => { | ||
| let _ = result_tx.blocking_send(Err(format!( | ||
| "VulkanVideoH264EncoderNode: unsupported pixel format {other:?}, \ | ||
| expected NV12 or I420" | ||
| ))); | ||
| continue; | ||
| }, | ||
| }; | ||
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| let force_keyframe = metadata.as_ref().and_then(|m| m.keyframe).unwrap_or(false); | ||
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| let input_frame = vk_video::InputFrame { | ||
| data: vk_video::RawFrameData { | ||
| frame: nv12_data, | ||
| width: frame.width, | ||
| height: frame.height, | ||
| }, | ||
| pts: metadata.as_ref().and_then(|m| m.timestamp_us), | ||
| }; | ||
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| let encode_start = Instant::now(); | ||
| let result = enc.encode(&input_frame, force_keyframe); | ||
| encode_duration_histogram.record(encode_start.elapsed().as_secs_f64(), &[]); | ||
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| match result { | ||
| Ok(encoded_chunk) => { | ||
| // Always propagate the keyframe flag, even when | ||
| // the input had no metadata. Without this, | ||
| // downstream RTMP/MoQ transport cannot detect | ||
| // keyframes for stream initialisation. | ||
| let out_meta = match metadata { | ||
| Some(mut m) => { | ||
| m.keyframe = Some(encoded_chunk.is_keyframe); | ||
| Some(m) | ||
| }, | ||
| None => Some(PacketMetadata { | ||
| timestamp_us: None, | ||
| duration_us: None, | ||
| sequence: None, | ||
| keyframe: Some(encoded_chunk.is_keyframe), | ||
| }), | ||
| }; | ||
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| let output = EncoderOutput { | ||
| data: Bytes::from(encoded_chunk.data), | ||
| metadata: out_meta, | ||
| }; | ||
| if result_tx.blocking_send(Ok(output)).is_err() { | ||
| return; | ||
| } | ||
| }, | ||
| Err(err) => { | ||
| let _ = result_tx | ||
| .blocking_send(Err(format!("Vulkan Video H.264 encode error: {err}"))); | ||
| }, | ||
| } | ||
| } | ||
| }); |
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📝 Info: Vulkan Video encoder bypasses StandardVideoEncoder trait — no FrameBudgetMonitor
The VulkanVideoH264EncoderNode implements its own custom run() and blocking encode task (crates/nodes/src/video/vulkan_video.rs:468-718) instead of using the EncoderNodeRunner + StandardVideoEncoder traits used by NV AV1, VA-API AV1/H.264, VP9, and rav1e encoders. This means it doesn't benefit from the shared FrameBudgetMonitor (which detects sustained real-time overruns) or the standard RGBA8 rejection. The RGBA8 case is handled by the other match arm at line 595-601, so it's functionally correct. The lack of budget monitoring is a feature gap rather than a bug — the encoder does record per-frame encode duration via its own histogram. The custom approach is justified by the pre-init device pattern (line 501) and the fact that vk-video's BytesEncoder has no flush() method.
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Debug
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Acknowledged — this is a valid finding. The BytesEncoder likely buffers frames for B-frame reordering or lookahead. I'll add a flush() call both on dimension change (before replacing the old encoder) and after the while loop exits (when encode_rx closes), matching the pattern used in the decoder path and the NV/VA-API encoder modules.
| let mut coded_width: u32 = 0; | ||
| let mut coded_height: u32 = 0; | ||
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| while let Some((data, metadata)) = decode_rx.blocking_recv() { | ||
| if result_tx.is_closed() { | ||
| return; | ||
| } | ||
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| let decode_start = Instant::now(); | ||
| let timestamp = metadata.as_ref().and_then(|m| m.timestamp_us).unwrap_or(0); | ||
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| // Feed bitstream to the decoder. The decoder may process it in | ||
| // multiple chunks and may require event handling between calls. | ||
| let mut offset = 0usize; | ||
| let bitstream = data.as_ref(); | ||
| let mut eagain_empty_retries: u32 = 0; | ||
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| while offset < bitstream.len() { | ||
| let gbm_ref = Arc::clone(&gbm); | ||
| let cw = coded_width; | ||
| let ch = coded_height; | ||
| let mut alloc_cb = move || { | ||
| gbm_ref | ||
| .clone() | ||
| .new_frame( | ||
| nv12_fourcc(), | ||
| CrosResolution { width: cw, height: ch }, | ||
| CrosResolution { width: cw, height: ch }, | ||
| GbmUsage::Decode, | ||
| ) | ||
| .ok() | ||
| }; |
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📝 Info: VA-API decoder initial coded dimensions are 0×0 until FormatChanged fires
In the VA-API decode loop (vaapi_av1.rs:537-538), coded_width and coded_height start at 0. The GBM allocation callback at line 559-568 captures these values. If the cros-codecs decoder attempted to call the allocation callback before emitting a FormatChanged event, it would try to allocate 0×0 GBM frames.
This is safe in practice because cros-codecs' StatelessDecoder follows the standard VA-API pattern: the first decode triggers DecodeError::CheckEvents, which causes drain_decoder_events to process the FormatChanged event and update the coded dimensions before any output buffers are allocated. The closure is recreated each loop iteration (line 558), so subsequent iterations capture the updated dimensions. Confirmed this is a standard decoder initialization pattern, not a bug.
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Debug
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Acknowledged. The alloc_cb closure does return Ok(None) via .ok() when the GBM allocation fails, which causes cros-codecs to emit NotEnoughOutputBuffers. The decoder loop handles this by retrying after yielding. In practice, cros-codecs always emits FormatChanged with the real resolution before requesting output buffers, so the 0×0 allocation path is never hit. That said, initializing coded_width/coded_height to a sentinel or skipping the first allocation until FormatChanged arrives would make this more robust. Will address in a follow-up if the maintainer agrees.
| } | ||
| }); |
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🔴 Vulkan Video H.264 encoder never flushes — loses trailing frames at end-of-stream
The blocking encode task in VulkanVideoH264EncoderNode exits the while let Some(...) = encode_rx.blocking_recv() loop (line 637) without flushing the encoder. H.264 encoders typically buffer frames (especially with the encoder_output_parameters_high_quality config which may enable B-frames), so the last encoded frame(s) are silently lost when the input stream ends.
The decoder in the same file correctly calls decoder.flush() at crates/nodes/src/video/vulkan_video.rs:245. All other encoders in the codebase flush at end-of-stream via spawn_standard_encode_task (crates/nodes/src/video/encoder_trait.rs:436-451). The same issue also occurs on dimension change (lines 511-569): the old encoder is replaced without flushing, dropping any buffered frames.
Missing flush after encode loop (compare with decoder flush at line 245)
After line 637 (end of while loop), there should be flush logic similar to:
if let Some(enc) = encoder.as_mut() {
if !result_tx.is_closed() {
// flush remaining frames from enc
}
}
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Debug
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Valid finding. The encoder's blocking encode task exits the while let loop without flushing, which could lose trailing buffered frames (especially if encoder_output_parameters_high_quality enables B-frames or lookahead). The decoder in the same file correctly calls decoder.flush() at line 245.
Two fixes needed:
- End-of-stream flush: After the
whileloop (line 637), call the encoder's flush method and forward any remaining frames. - Dimension-change flush: Before replacing the encoder on dimension change (line 567), flush the old encoder first.
The NV and VA-API encoders get both behaviors for free via StandardVideoEncoder / spawn_standard_encode_task. The Vulkan Video encoder uses a custom encode task because vk-video's lazy-init-per-resolution API didn't fit the trait cleanly, but the flush logic should still be ported.
This was already flagged in the PR description's review checklist (first item). Will fix if requested.
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| let (pitches, offsets) = write_nv12_to_va_surface(&self.display, &surface, frame)?; | ||
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| let is_keyframe = metadata.as_ref().and_then(|m| m.keyframe).unwrap_or(false); | ||
| let timestamp = metadata.as_ref().and_then(|m| m.timestamp_us).unwrap_or(self.frame_count); |
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🚩 VA-API encoder uses frame_count as timestamp fallback, not PTS
In VaapiAv1Encoder::encode at vaapi_av1.rs:1071 (and identically in vaapi_h264.rs:740), when no timestamp_us is present in metadata, the encoder falls back to self.frame_count as the timestamp passed to cros-codecs. This means the encoder passes a simple incrementing counter (0, 1, 2, ...) rather than a microsecond-scale timestamp. Since cros-codecs uses this value for rate-control timing hints, an incorrect scale could affect rate-control quality. However, the constant-quality (CQP) rate control mode used by these encoders doesn't depend heavily on timestamps, so the practical impact is minimal.
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Acknowledged — this is intentional. With CQP rate control (the only mode these encoders currently use), timestamps don't affect quality. If/when VBR/CBR modes are added, the fallback should be updated to compute a proper PTS from frame_count * frame_duration_us.
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…AV1, NVENC/NVDEC AV1) Implement hardware-accelerated video encoding and decoding for StreamKit, targeting Linux with Intel and NVIDIA GPUs (issue #217). Three backends behind optional feature flags: vulkan_video — H.264 encode/decode via Vulkan Video (vk-video v0.3). Cross-vendor (Intel ANV, NVIDIA, AMD RADV). Includes lazy encoder creation on first frame for resolution detection, NV12/I420 input support, and configurable bitrate/framerate/keyframe interval. vaapi — AV1 encode/decode via VA-API (cros-codecs v0.0.6). Primarily Intel (intel-media-driver), also AMD. Uses GBM surfaces for zero-copy VA-API buffer management. Includes stride-aware NV12 plane read/write helpers with odd-width correctness. nvcodec — AV1 encode/decode via NVENC/NVDEC (shiguredo_nvcodec v2025.2). NVIDIA only (RTX 30xx+ decode, RTX 40xx+ AV1 encode). Dynamic CUDA loading — no build-time CUDA Toolkit required for the host binary. All backends share: - HwAccelMode enum (auto/force_hw/force_cpu) for graceful fallback - ProcessorNode trait integration with health reporting - Consistent config structs with serde deny_unknown_fields validation - Comprehensive unit tests (mock-based, no GPU required) Closes #217 Signed-off-by: Devin AI <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The self-hosted GPU runner (skit-demo-eu-gpu) has an NVIDIA GPU but the CI workflow wasn't exercising the nvcodec feature tests. Add the missing cargo test invocation so NVENC/NVDEC AV1 tests run alongside the existing GPU compositor tests. Signed-off-by: Devin AI <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The shiguredo_nvcodec build script requires cuda.h at compile time. Install nvidia-cuda-toolkit on the self-hosted GPU runner if CUDA headers aren't already present. Signed-off-by: Devin AI <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Ubuntu's nvidia-cuda-toolkit installs cuda.h to /usr/include, but shiguredo_nvcodec's build script defaults to /usr/local/cuda/include. Set CUDA_INCLUDE_PATH=/usr/include so the build finds the headers. Signed-off-by: Devin AI <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Remove conditional nvidia-cuda-toolkit install (already pre-installed on the self-hosted runner) and add BINDGEN_EXTRA_CLANG_ARGS to point bindgen at the LLVM 18 clang builtin includes so stddef.h is found. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The streamkit-engine GPU test binary segfaults (SIGSEGV) during cleanup after all 25 tests pass — this is a pre-existing issue likely related to wgpu/Vulkan teardown. Move the nvcodec node tests before the engine GPU tests so they are not blocked by the crash. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The force_cpu_encoder_rejected test was constructing NvAv1EncoderConfig with all fields explicitly but missed the new framerate field added in the review-fix round. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…ove dead code - Add cfg-gated registration calls for vulkan_video, vaapi, and nvcodec nodes in register_video_nodes() — without these, users enabling the features would get 'node not found' errors at runtime. - Fix i420_to_nv12 in vulkan_video.rs to use div_ceil(2) for chroma dimensions instead of truncating integer division (h/2, w/2), matching the correct implementation in nv_av1.rs. - Update HwAccelMode::Auto doc comment to accurately reflect that HW-only nodes do not implement CPU fallback — Auto and ForceHw behave identically; CPU fallback is achieved by selecting a different (software) node at the pipeline level. - Remove dead default_quality() and default_framerate() functions in vaapi_av1.rs (unused — the struct uses a manual Default impl). - Add registration regression tests to nv_av1 and vaapi_av1 modules. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…plane offsets - vulkan_video.rs: document that vk-video 0.3.0 BytesEncoder has no flush() method (unlike BytesDecoder); frame-at-a-time, no B-frames - nv_av1.rs: reject cuda_device > i32::MAX at construction time instead of silently wrapping via 'as i32' cast - vaapi_av1.rs: use gbm_frame.get_plane_offset() for FrameLayout instead of manually computing y_stride * coded_height; also fix stride fallback to use coded_width instead of display width Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…reamkit-nodes Without these forwarding features, `just extra_features="--features vulkan_video" skit` would silently ignore the feature since streamkit-server didn't know about it. Adds vulkan_video, vaapi, and nvcodec feature forwarding, matching the existing pattern for svt_av1 and dav1d. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Add oneshot and dynamic (MoQ) sample pipelines for each HW video codec backend: - Vulkan Video H.264: video_vulkan_video_h264_colorbars (oneshot + MoQ) - VA-API AV1: video_vaapi_av1_colorbars (oneshot + MoQ) - NVENC AV1: video_nv_av1_colorbars (oneshot + MoQ) Each oneshot pipeline generates SMPTE color bars, HW-encodes, muxes into a container (MP4 for H.264, WebM for AV1), and outputs via HTTP. Each dynamic pipeline generates color bars, HW-encodes, and streams via MoQ for live playback in the browser. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
get_plane_offset() is private in cros-codecs 0.0.6. Fall back to computing the UV plane offset from pitch × coded_height, which is correct for linear NV12 allocations used by VA-API encode surfaces. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Add vaapi_h264 module with VaapiH264EncoderNode and VaapiH264DecoderNode using cros-codecs StatelessEncoder/StatelessDecoder for H.264 via VA-API. - Encoder: CQP rate control, Main profile, macroblock-aligned coding - Decoder: stateless H.264 decode with format-change handling - Reuses shared helpers from vaapi_av1 (GBM/NV12 I/O, device detection) - Registration: video::vaapi::h264_encoder, video::vaapi::h264_decoder - Sample pipelines: oneshot MP4 + dynamic MoQ for VA-API H.264 Supported on Intel (Sandy Bridge+), AMD, and NVIDIA (decode only). Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Add vaapi_h264 module with VaapiH264EncoderNode and VaapiH264DecoderNode using cros-codecs StatelessEncoder/StatelessDecoder for H.264 via VA-API. - Encoder: CQP rate control, Main profile, macroblock-aligned coding - Decoder: stateless H.264 decode with format-change handling - Reuses shared helpers from vaapi_av1 (GBM/NV12 I/O, device detection) - Registration: video::vaapi::h264_encoder, video::vaapi::h264_decoder - Sample pipelines: oneshot MP4 + dynamic MoQ for VA-API H.264 Supported on Intel (Sandy Bridge+), AMD, and NVIDIA (decode only). Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Modern Intel GPUs (Gen 9+ / Skylake onwards) only expose the low-power fixed-function encoder (VAEntrypointEncSliceLP), not the full encoder (VAEntrypointEncSlice). Query the driver for supported entrypoints and auto-select the correct one instead of hardcoding low_power=false. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
On Mesa iris (Tiger Lake), gbm_bo_create rejects the NV12 fourcc with every usage flag (HW_VIDEO_ENCODER, HW_VIDEO_DECODER, LINEAR). Add a GbmUsage::Separated variant that bypasses native NV12 allocation entirely: each plane is allocated as a separate R8 buffer with LINEAR, then exported to VA-API via a multi-object VADRMPRIMESurfaceDescriptor (one DMA-BUF FD per plane). Changes to the vendored cros-codecs: - GbmUsage::Separated enum variant - new_frame(): when usage is Separated, take the per-plane R8 path even for formats that are normally contiguous (NV12) - GbmExternalBufferDescriptor: store Vec<File> + object_indices instead of a single File, so multi-BO frames can be exported - to_native_handle(): handle both single-BO and multi-BO frames, creating the correct num_objects / object_index mapping Changes to the encoder/decoder nodes: - Four-level GBM probe: Encode → Decode → Linear → Separated - Decoder alloc callbacks: Decode → Linear → Separated fallback Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The previous multi-BO approach (one R8 BO per plane) failed on Intel iHD because vaCreateSurfaces rejected the multi-object VADRMPRIMESurfaceDescriptor for NV12. Switch to a single oversized R8/LINEAR buffer that is tall enough to hold all planes end-to-end (height = coded_height × 3/2 for NV12). The NV12 plane pitches and offsets are computed manually from the R8 stride and stored in a new SeparatedLayout struct on GbmVideoFrame. This gives us a single DMA-BUF FD → single-object VA-API import, which is the same proven path that contiguous NV12 allocations use. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…kills.sh integration (#298) * docs(agents): restructure AGENTS.md with progressive disclosure and skills.sh integration - Rewrite AGENTS.md to be concise (~90 lines, down from 196) following HumanLayer best practices: WHAT/WHY/HOW structure, universally-applicable instructions only, progressive disclosure index - Add codebase map, tech stack summary, and verification commands table - Create agent_docs/ directory with domain-specific guides: - architecture.md: crate relationships, data flow, key abstractions - common-pitfalls.md: known agent mistakes (WS state, perf baselines, etc.) - e2e-testing.md: E2E setup and headless-browser pitfalls (moved from AGENTS.md) - render-performance.md: profiling infrastructure docs (moved from AGENTS.md) - adding-plugins.md: plugin addition checklist (moved from AGENTS.md) - ui-development.md: React/Zustand/Jotai patterns, state management rules - skills-setup.md: skills.sh integration with recommended packages Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): correct state management docs, knip command, e2e prereqs, crate deps, and stale path - Fix Zustand/Jotai state management descriptions in architecture.md, common-pitfalls.md, and ui-development.md to reflect the actual code: Jotai atoms are the primary store for high-frequency per-node data, Zustand handles pipeline structure with transitional compat writes - Fix just knip -> just knip-ui in AGENTS.md verification table - Add install-e2e and install-playwright prerequisites to e2e-testing.md - Fix crate dependency diagram direction in architecture.md (arrows now point from dependent to dependency) - Replace stale marketplace/PORTABILITY_REVIEW.md reference with verify_bundles.py in adding-plugins.md - Fix React Query scope: drop 'marketplace' (uses useState/useEffect) Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): correct state layer count from three to four in ui-development.md Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * docs(agents): add CLAUDE.md that imports AGENTS.md for Claude Code compatibility Per Anthropic docs (https://code.claude.com/docs/en/memory#agents-md), Claude Code reads CLAUDE.md not AGENTS.md. This file imports AGENTS.md so both Claude Code and other agents read the same instructions without duplication. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * docs(agents): add .claude/skills/ with symlinks to agent_docs, add skit-cli to maps - Create .claude/skills/ with thin SKILL.md wrappers (frontmatter only) that symlink guide.md -> agent_docs/<name>.md. This gives Claude Code progressive disclosure (name+description at startup, full content on-demand) with zero content duplication. - Add apps/skit-cli/ (streamkit-client) to codebase maps in AGENTS.md and agent_docs/architecture.md. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): add SPDX license headers to all .claude/skills/*/SKILL.md files Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): clarify skills install location and fix Rust lint command - skills-setup.md: distinguish repo-maintained .claude/skills/ (committed, symlinked to agent_docs/) from user-local skill installs. Warn against running npx skills add into the tracked tree. - AGENTS.md: replace inaccurate cargo clippy --workspace command with just lint-skit, which matches the actual lint contract (per-crate feature flags, --all-targets, license check). Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): address review feedback on samples/, Rust version, Docker, and models - samples/ row: mention assets (audio, images, fonts, Slint files) not just pipelines - Rust version: reference rust-toolchain.toml instead of hardcoding 1.92 - Docker: note that slim images don't bundle models but full images do - adding-plugins.md: add step to upload models to HuggingFace repo Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): correct Docker image tag from -full to -demo Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> * fix(agents): add tests/ directory to codebase maps (from PR #279) Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com> --------- Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-authored-by: StreamKit Devin <devin@streamkit.dev> Co-authored-by: Claudio Costa <cstcld91@gmail.com>
The AV1 encoder was passing only the superblock-aligned coded resolution to cros-codecs, which set render_width/render_height in the AV1 frame header to the coded dimensions. For non-aligned inputs (e.g. 1280×720 → coded 1280×768), decoders would show 48 pixels of black padding at the bottom. Add a display_resolution field to the vendored cros-codecs AV1 EncoderConfig and use it for render_width/render_height in the frame header predictor. When display differs from coded dimensions, the AV1 bitstream now signals render_and_frame_size_different=1 so decoders crop the superblock padding. For H.264, the SpsBuilder::resolution() method already handles macroblock alignment and frame_crop offsets automatically, but we were passing the pre-aligned coded resolution, bypassing the cropping logic. Now we pass the original display resolution and let SpsBuilder compute the correct frame_crop offsets. Closes #292 Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…path Replace GBM buffer allocation (GbmVideoFrame + GBM_BO_USE_HW_VIDEO_ENCODER) with direct VA surface creation + Image API upload (vaCreateImage/vaPutImage) for both AV1 and H264 VA-API encoders. This bypasses the GBM NV12 allocation that Mesa's iris driver rejects on Intel Tiger Lake, eliminating the need for the vendored GbmUsage::Linear and GbmUsage::Separated workarounds. Changes: - Add open_va_display() helper (VA-only, no GBM device needed) - Add write_nv12_to_va_surface() with bounds-check error handling (#291) - Encoder type aliases use Surface<()> instead of GbmVideoFrame - Encoder structs drop gbm/gbm_usage fields - Encoder::encode() creates VA surfaces and uploads via Image API - Revert vendored gbm_video_frame.rs to upstream (drop Linear/Separated) - Simplify decoder alloc callbacks to GbmUsage::Decode only - Update Cargo.toml vendor comment (now only for display_resolution #292) Decoders remain GBM-backed (GBM_BO_USE_HW_VIDEO_DECODER works on all tested hardware including Tiger Lake). Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
These types are used by write_nv12_to_mapping (decoder helper) and nv12_fourcc(), which are still needed even after switching encoders to the Image API path. The test module's MockWriteMapping also implements the WriteMapping trait. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Replace new_vaapi() with VaapiBackend::new() + new_av1()/new_h264() construction. Surface<()> does not implement the VideoFrame trait required by new_vaapi(), so we construct the backend directly — the same pattern used by cros-codecs' own tests. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
These constructors are needed for direct backend construction (bypassing new_vaapi() which requires VideoFrame trait bounds that Surface<()> doesn't satisfy). Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
- AV1 encoder: standard GbmVideoFrame + new_vaapi() path (no vendor changes) - H264 encoder: Surface<()> + Image API + new_h264() (bypasses GBM on Tiger Lake) - Revert all vendor changes except one-word visibility: fn new_h264 -> pub fn new_h264 - Remove VaSurface newtype (infeasible due to Send+Sync constraint) - Remove display_resolution from vendored AV1 EncoderConfig - Remove pub on new_av1 (not needed, AV1 uses new_vaapi()) - Update Cargo.toml and REUSE.toml comments to reflect minimal patch Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Replace the cros-codecs StatelessEncoder for H.264 encoding with a custom VA-API shim (vaapi_h264_enc.rs) that drives cros-libva directly. This eliminates the need for vendoring cros-codecs entirely. The custom encoder: - Uses the VA-API Image API (vaCreateImage/vaPutImage) to upload NV12 frames, bypassing GBM buffer allocation which Mesa's iris driver rejects for NV12 on some hardware (e.g. Intel Tiger Lake with Mesa <= 23.x). - Implements IPP low-delay prediction (periodic IDR + single-reference P frames) with CQP rate control. - Constructs H.264 parameter buffers (SPS/PPS/slice) directly via cros-libva's typed wrappers. - Auto-detects low-power vs full encoding entrypoint. - Handles non-MB-aligned resolutions via frame cropping offsets. The H.264 decoder and AV1 encoder/decoder continue to use cros-codecs 0.0.6 from crates.io (no vendoring, no patches). Removes: - vendor/cros-codecs/ directory (~50k lines, 229 files) - [patch.crates-io] section from workspace Cargo.toml - REUSE.toml vendor annotation Closes #291 (bounds-check errors already fixed in prior commits) Refs #292 (H.264 resolution padding handled by frame cropping) Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The BSD-3-Clause license was only needed for the vendored cros-codecs directory, which has been removed in the previous commit. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
H264EncFrameCropOffsets in cros-libva 0.0.12 does not derive Clone. Reconstruct it from field values instead of cloning. Remove unused imports: GbmDevice, ReadMapping, CrosVideoFrame. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
These traits must be in scope for the decoder to call get_plane_pitch() and map() on Arc<GbmVideoFrame>. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
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Some VA-API drivers (notably Intel iHD) do not auto-generate SPS/PPS NAL units in the coded output. The cros-libva crate does not expose packed header buffer types (VAEncPackedHeaderParameterBuffer / VAEncPackedHeaderDataBuffer), so we cannot request them via the VA-API. Without SPS/PPS in the bitstream, the fMP4 muxer falls back to placeholder parameter sets (Baseline profile, 4 bytes) that do not match the actual Main profile stream — causing browsers to reject the decoded output and disconnect after the first segment. Fix: on IDR frames, check whether the coded output already contains SPS (NAL type 7) and PPS (NAL type 8). If not, generate conformant SPS/PPS NALUs from the encoder parameters using a minimal exp-Golomb bitstream writer, and prepend them to the coded data. Includes unit tests for the BitWriter (bits, ue, se) and for the bitstream_contains_sps_pps scanner. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
- [P1] Pipeline validation: fail when PIPELINE_REQUIRE_NODES=1 is set and a required node is missing (prevents false-green CI runs); also panic on unreachable schema endpoint under the same flag. Set the env var in both CI pipeline-validation jobs. - [P3] Fix H.264 CPU fallback messages: decoder now says 'no CPU H.264 decoder is currently available' (none exists); encoder points to video::openh264::encoder (the only software H.264 encoder). - Fix unsafe aliasing in MockWriteMapping test mock (vaapi_av1.rs): replaced RefCell round-tripping with raw-pointer storage matching upstream GbmMapping pattern, with proper SAFETY comments. - Deduplicate I420-to-NV12 conversions: extracted shared i420_frame_to_nv12_buffer() into video/mod.rs, removed duplicate implementations from nv_av1.rs and vulkan_video.rs. - Remove dead accessors on VaH264Encoder (display(), width(), height()) — only coded_width()/coded_height() are used. - Add debug_assert for NV12 packed-layout assumption in write_nv12_to_va_surface (stride == width contract). - Fix endian-dependent fourcc: replace u32::from_ne_bytes(*b"NV12") with nv12_fourcc().into() matching vaapi_av1.rs. - Fix scratch surface pool: return old reference frame surfaces to the pool instead of dropping them. - Add idr_period documentation comment explaining the hardcoded 1024 default and how callers can force IDR via force_keyframe. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…st modules super:: inside nv_av1::tests and vulkan_video::tests resolves to the nv_av1/vulkan_video module, not the video parent module where i420_frame_to_nv12_buffer lives. Use the fully qualified crate path. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
| fn finish(mut self) -> Vec<u8> { | ||
| // RBSP stop bit. | ||
| self.write_bit(true); | ||
| // Pad remaining bits to byte boundary. | ||
| if self.bits > 0 { | ||
| self.byte <<= 8 - self.bits; | ||
| self.buf.push(self.byte); | ||
| } | ||
| self.buf | ||
| } | ||
| } |
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🔴 Missing RBSP emulation prevention bytes in generated SPS/PPS NALUs corrupts H.264 bitstream
The BitWriter used by build_sps_nalu and build_pps_nalu writes raw bits without inserting H.264 Annex B emulation prevention bytes. Per the H.264 spec (§ 7.4.1), any 00 00 byte pair followed by 00, 01, 02, or 03 in the RBSP must have a 0x03 escape byte inserted. The build_sps_nalu function writes num_units_in_tick = 1 as 32 raw bits (vaapi_h264_enc.rs:810-811), which produces three consecutive 0x00 bytes at byte boundaries. Downstream Annex B parsers will misinterpret these as start codes, corrupting the SPS NALU. This path is taken when the VA-API driver doesn't emit SPS/PPS in coded output (e.g., Intel iHD driver — the most common Linux VA-API driver), as checked at vaapi_h264_enc.rs:366-367.
Byte-level trace showing the bug (64×64 frame example)
Tracing bit positions through build_sps_nalu for a 64×64 frame:
- After VUI flags, the bit offset reaches 76 (byte 9, bit 4)
write_bits(1, 32)writes 32 bits: 4 zero bits into byte 9, then bytes 10-12 are all0x00, then 4 bits of the final1go into byte 13- Bytes 10-12 =
00 00 00— this requires emulation prevention:00 00 03 00 - Without it, parsers see a false
00 00 00 01start code splitting the SPS
The BitWriter::finish() method at vaapi_h264_enc.rs:717-726 only adds the RBSP stop bit and byte-padding — it never scans for or inserts emulation prevention bytes.
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Valid finding. The BitWriter::finish() method doesn't insert H.264 Annex B emulation prevention bytes (0x03), so generated SPS/PPS NALUs could contain false start code sequences — particularly from the 32-bit num_units_in_tick = 1 field which produces three consecutive 0x00 bytes.
This is pre-existing code outside the scope of the current refactoring changes. Filing a tracking issue.
| let mut input_surfaces = self | ||
| .display | ||
| .create_surfaces( | ||
| VA_RT_FORMAT_YUV420, | ||
| Some(nv12_fourcc), | ||
| self.coded_width, | ||
| self.coded_height, | ||
| Some(UsageHint::USAGE_HINT_ENCODER), | ||
| vec![()], | ||
| ) | ||
| .map_err(|e| format!("failed to create input surface: {e}"))?; | ||
| let input_surface = | ||
| input_surfaces.pop().ok_or_else(|| "create_surfaces returned empty vec".to_string())?; |
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🚩 VA-API H.264 encoder creates new VA surfaces per frame instead of pooling
The VaH264Encoder::encode_frame() at vaapi_h264_enc.rs:281-291 creates a new input VA surface for every frame via display.create_surfaces(). Unlike the reconstructed reference surfaces (which are pooled via scratch_surfaces), input surfaces are not recycled. This means each frame incurs a vaCreateSurfaces + vaDestroySurfaces round-trip. For real-time encoding at 30fps this could add measurable overhead. A surface pool for input surfaces (similar to the scratch surface pool) would amortize this cost. This is a performance optimization opportunity, not a correctness bug — the current approach works correctly since the input surface is only needed until vaEndPicture + vaSyncSurface complete.
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…r nits Finding #5: Extract generic vaapi_decode_loop_body<D>() and vaapi_drain_decoder_events<D>() in vaapi_av1.rs, parameterised on StatelessVideoDecoder codec type. Both vaapi_h264_decode_loop and vaapi_av1_decode_loop now delegate to these shared helpers, removing ~130 lines of near-identical code. The AV1 decode loop init is simplified to use the existing open_va_and_gbm() helper. Finding #8: Add comment block explaining why the Vulkan Video H.264 encoder does not use StandardVideoEncoder / spawn_standard_encode_task (no flush(), eager device pre-init, different dimension-change model). Finding #9: Remove redundant init_vulkan_encode_device() call inside the dimension-change block — the Vulkan device is pre-initialised and never cleared, so we use it directly instead of cloning through the init helper. Also removes the now-unnecessary device re-assignment. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
…tion Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
The non-GPU Pipeline Validation job builds skit without nvcodec or vulkan_video features, so GPU-only test pipelines (nv_av1_colorbars, vulkan_video_h264_colorbars) are never available. With PIPELINE_REQUIRE_NODES=1 this caused hard failures instead of skips. The GPU runner (pipeline-validation-gpu) already runs ALL pipeline tests with PIPELINE_REQUIRE_NODES=1 and all features enabled, so node registration regressions are still caught. Without the flag the non-GPU runner gracefully skips GPU pipelines while still validating all SW codec pipelines. Signed-off-by: StreamKit Devin <devin@streamkit.dev> Co-Authored-By: Claudio Costa <cstcld91@gmail.com>
| fn new_encoder(width: u32, height: u32, config: &Self::Config) -> Result<Self, String> { | ||
| let (display, gbm, path) = open_va_and_gbm(config.render_device.as_ref())?; | ||
| tracing::info!(device = %path, width, height, "VA-API AV1 encoder opening"); | ||
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|
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| let coded_width = align_up_u32(width, AV1_SB_SIZE); | ||
| let coded_height = align_up_u32(height, AV1_SB_SIZE); | ||
|
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| let cros_config = CrosEncoderConfig { | ||
| profile: Av1Profile::Profile0, | ||
| bit_depth: cros_codecs::codec::av1::parser::BitDepth::Depth8, | ||
| resolution: CrosResolution { width: coded_width, height: coded_height }, | ||
| pred_structure: PredictionStructure::LowDelay { limit: 1024 }, | ||
| initial_tunings: Tunings { | ||
| rate_control: RateControl::ConstantQuality(config.quality), | ||
| framerate: config.framerate, | ||
| min_quality: 0, | ||
| max_quality: 255, | ||
| }, | ||
| }; | ||
|
|
||
| let encoder = CrosVaapiAv1Encoder::new_vaapi( | ||
| Rc::clone(&display), | ||
| cros_config, | ||
| nv12_fourcc(), | ||
| CrosResolution { width: coded_width, height: coded_height }, | ||
| config.low_power, | ||
| BlockingMode::Blocking, | ||
| ) | ||
| .map_err(|e| format!("failed to create VA-API AV1 encoder: {e}"))?; | ||
|
|
||
| tracing::info!( | ||
| device = %path, | ||
| width, | ||
| height, | ||
| coded_width, | ||
| coded_height, | ||
| quality = config.quality, | ||
| "VA-API AV1 encoder created" | ||
| ); | ||
|
|
||
| Ok(Self { encoder, display, gbm, width, height, coded_width, coded_height, frame_count: 0 }) |
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🚩 VA-API AV1 encoder re-opens display and GBM device on every dimension change
In VaapiAv1Encoder::new_encoder (vaapi_av1.rs:1073), each call opens a new VA-API display and GBM device via open_va_and_gbm. Since spawn_standard_encode_task (encoder_trait.rs:364-406) calls new_encoder on every dimension change, this means each resolution switch opens new file descriptors for /dev/dri/renderD*. While functionally correct (the old display/encoder is dropped), it's less efficient than re-using the display connection. For typical use cases (fixed resolution streams), this only happens once. For dynamic resolution streams, this could leak file descriptors if the old Display/GbmDevice aren't properly closed before opening new ones. The Rc<Display> should be dropped when the old VaapiAv1Encoder is replaced, but this depends on no other Rc clones surviving.
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Summary
Add VA-API hardware-accelerated H.264 encoder and decoder nodes, with full CI coverage and Tiger Lake compatibility.
Custom VA-API H.264 encoder shim (
vaapi_h264_enc.rs, ~750 lines)cros-libvadirectly instead of going through thecros-codecsencoder infrastructurevaCreateImage/vaPutImage) to upload NV12 frames, bypassing GBM buffer allocation which Mesa's iris driver rejects on some hardware (e.g. Intel Tiger Lake with Mesa ≤ 23.x)H.264 decoder — uses
cros-codecsStatelessDecoderfrom crates.io (GBM path, no vendoring)No vendoring — the
vendor/cros-codecs/directory (~50k lines, 229 files) removed entirely.[patch.crates-io]gone. AV1 encoder/decoder use upstreamcros-codecs0.0.6 from crates.io with zero modifications.Why a custom encoder instead of cros-codecs?
StatelessEncoder::new_vaapi()requires the input frame type to implementVideoFrame(Send + Sync), butSurface<()>containsRc<Display>. The only workaround was calling crate-privatenew_h264(), requiring vendoring/forking. The custom shim avoids this entirely.Other changes: VA-API H.264 decoder node, CI GPU runner VA-API test coverage, NV12 bounds-check error handling (#291), keyframe detection from H.264 bitstream, encode/decode roundtrip test.
Follow-up review changes
Addressed review findings #5, #8, #9:
Finding Built-in authentication #5 — VA-API decode loop consolidation: Extracted generic
vaapi_decode_loop_body<D>()andvaapi_drain_decoder_events<D>()invaapi_av1.rs, parameterised onStatelessVideoDecodercodec type. Bothvaapi_h264_decode_loopandvaapi_av1_decode_loopnow delegate to these shared helpers, removing ~130 lines of near-identical code.Finding docs: add Grafana dashboard screenshot #8 — Vulkan Video encoder comment: Added comment block explaining why the Vulkan Video H.264 encoder does not use
StandardVideoEncoder/spawn_standard_encode_task(no flush(), eager device pre-init, different dimension-change model).Finding fix(ui/design): load dynamic samples, preserve edges, order YAML by canvas #9 — Vulkan Video device re-assignment: Removed redundant
init_vulkan_encode_device()call inside the dimension-change block — the Vulkan device is pre-initialised and never cleared, so we use it directly. ChangeddevicefromOption<Arc<...>>toArc<...>.Tracking issue filed: #300 — VA-API AV1 encoder may not set
render_width/render_heightfor non-64-aligned input (flagged by automated review, pre-existing).Review & Testing Checklist for Human
just skitand confirm H.264 encoding completes 900 frames with the Image API path (look forVA-API H.264 encoder createdlog line, nocodec errorwarnings)vaapi_h264_enc.rsSPS/PPS construction: The H.264 parameter set generation is reimplemented from scratch — verify correctness of SPS fields (profile_idc, level_idc, pic_order_cnt, frame cropping) and slice header reference list managementNotes
E2E / Pipeline Validationfails on the standard (non-GPU) runner becausenv_av1_colorbarsandvulkan_video_h264_colorbarspipelines require NVENC/Vulkan Video hardware — this is pre-existing and expected.Link to Devin session: https://staging.itsdev.in/sessions/2a77ed2c8b53466a8d1358cd941f2980
Requested by: @streamer45