- New crates/platform (filmcraft-platform, L5): OS media FFI only. The one
crate allowed `unsafe` (own [lints] with unsafe_code = "deny",
#[allow(unsafe_code)] only on the videotoolbox module, SAFETY comment on
every block, safe Result-returning public API). AGENTS.md §0.3 names the
exception; docs/adr/0001-platform-ffi.md records why and the rules.
- VideoToolbox decoder for avcC / hvcC, 8/10-bit 4:2:0 and 4:2:2: session from
the sample entry's parameter sets with hardware required, asynchronous
decode (2 in flight), biplanar CVPixelBuffer copied to planar Yuv8/Yuv16,
reorder buffer of the stream's own depth, RASL skipped after a starting CRA.
Output callback under catch_unwind.
- HybridDecoder: transparent mid-stream fallback to the software decoder
(replays samples since the last restart point, drops already-returned
pictures). New codecs::software_video_decoder (built-in factories only) and
codecs::hw (switch, counters, NalStreamInfo shared with software decoders;
vui_color / sar_par helpers now used by both).
- Settings ▸ Playback ▸ Hardware decoding: Auto / Off (engine applies it to
the codecs switch); desktop app, CLI/MCP and bench call register().
- perf.stats decode.framesDecoded and decode.hardware counters.
- Tests: bit-exact parity with the software decoders (H.264 High, HEVC Main
open GOP, Main 10; resets, reseeks, flushes), forced-failure fallback,
mutation fuzz of samples and parameter sets, cross-platform fallback with a
stand-in decoder, setting Off, HEVC 4:2:2 vs ffmpeg.
- Bench --hw auto|off; results in docs/performance.md (4K CPU/frame
~86-119 ms -> ~4 ms).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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