Exp-Golomb values read with `read_ue()` can be as large as u32::MAX, so
`read_ue()? + N`, `log2_min + read_ue()?` and the cropping / conformance
window arithmetic overflowed: a panic in debug builds, and in release a
silent wrap (e.g. pic_width_in_mbs_minus1 = u32::MAX became a width of 0,
which passed the `<= 1024` check).
- bitstream: add `BitReader::read_ue_plus(n)`, an overflow-checked
`ue(v) + n` that returns InvalidExpGolomb.
- h264/hevc: use it for every `read_ue()? + N`; saturate the log2 size
sums (the existing range checks then reject them); validate the H.264
crop in u64; make HEVC `crop_rect` saturating; validate the HEVC RPS
delta range before casting to i32.
- Regression tests for each (they fail on the previous code).
- crates/media: probe (duration, rate/channels, size/fps; WMA/WMV recognised), audio decode to
f32 PCM (MP3, AAC M4A/ADTS, ALAC, WAV, AIFF, CAF, FLAC, Vorbis via symphonia; Opus with our
decoder in Ogg/WebM/MKV), video decode (MP4/MOV/WebM/MKV) with YUV->RGBA, poster frames,
trim/fade/volume, Player mixer + per-voice clock (device-clocked or wall-clocked), VideoFeed.
- Codec crates ported from FilmCraft: bitstream, h264, hevc, vp9, av1, isobmff, matroska, ogg, opus.
- insert.audio/insert.video probe and store duration/size and a poster frame; unplayable media
is embedded with a warning. New media.play/pause/toggle/stop/seek/info/posterFrame.
- UI: MediaHost (cpal output injected by the desktop app), control bar under media, video frames
on canvas and in the show; autoplay, click to play, loop, rewind, across slides, hide, full screen.
- Tests with in-code WAV/AIFF and CC0 self-generated fixtures (make.sh, ATTRIBUTION.md rows).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Pedro Jose Soto Rivera
Brandon Thomas