mp4 demuxer (untrusted input): bound every allocation sized from a box
field (stsz/stco/stsc counts, stts/ctts run-lengths, per-sample and moov
sizes, plus an absolute cap so a sparse file can't inflate file_len);
guard the parse_stsd slice and a zero mdhd timescale; cap track count so
the per-track PID can't overflow; rewrite read_moov to handle size==0 /
size<8 / 64-bit largesize; parse esds/AudioSpecificConfig for AAC; write
tkhd duration in the movie timescale.
decrypt: resolve_mux_key_map now fails loud on an extent no key can
classify instead of inheriting the previous extent's key, so a keymap
never silently carries a wrong key; the sweep/patch key-fetch recovery
fails loud when a unit is still unresolved after the retry.
AACS: reject inverted forensic segments in both range builders; compare
the forensic index in u16 space so an out-of-range value can't truncate
onto a valid u8 index. RECOVERED_ERROR no longer latches the damage zone,
preserving the 30s wedge cooldown for a following hard error.
audio: AAC/MP2/MP3/FLAC carry the last PTS across a PES with no timestamp;
the DTS-HD extension-sync search is bounded to after the core; the MP4
16.16 sample-rate field saturates. demux_sink records the video reference
before the kind filter so audio:// / sub:// keep multi-clip PTS continuity
and the DELAY tag.
Remove a dead error variant and the AACS-unsupported-video code; codec
comments cite the primary format specs; assorted doc/naming fixes and
regression tests throughout.
The json:// sink previously emitted only codec + language + pid per
stream. Fill it out to the full DiscTitle: video carries resolution
(+ pixel dims, interlaced), frame rate (+ fraction), HDR, colour space,
display aspect, and measured CICP; audio carries channels (+ count),
sample rate (+ Hz), and editorial purpose; subtitles carry the
qualifier. Add the clip list and chapter names. This is everything the
scan resolved, so json:// is a lossless machine-readable view of a
title rather than a summary.
Two write-only file sinks that ignore the PES stream and emit the title
metadata at construction (fvi-style, wired through output()):
- chapters:// — chapter markers in the format the extension picks: .xml
(Matroska, default), .txt/.ogm (OGM simple), .vtt (WebVTT). Reuses the
existing chapters_xml/chapters_ogm writers; adds a WebVTT writer.
- json:// — one title's model (playlist, duration, size, format, streams,
chapters) as pretty JSON via serde_json.
New mux/meta_sink.rs; StreamUrl gains Chapters/Json; codec_label +
chapters_xml/ogm promoted to pub(crate) for reuse.
Tests: chapters_format_selected_by_extension, title_json_carries_streams_and_chapters.
Matthew Jackson