Cracked how the game maps a movie to its voice track and reimplemented it,
fixing wrong/short voices for RT and hokyu cutscenes.
## Mechanism (RE'd from a Canary file-I/O trace, user-confirmed by ear)
The movie voices are ONE continuous XMA stream, physically chunked into
`<lang>\Movie\VOICE_*.slb` (and `\etc\VOICE_D_*.slb`) sound.pak TOC entries
whose boundaries do NOT align with the cutscene cues. A single cue routinely
spans two `.slb` chunks, so a `.slb` does not necessarily hold the track its
name claims (they are off-by-one vs the cues). Each cue ends at an inline
trailer descriptor `(sound_id:u32be, 0x11, …)` whose id repeats at +0x800.
Resolution chain (all derivable on-disc, no guest-code RE):
1. movie -> cue token (ADVERTISE_MOVIE manifest VOICETRACK)
2. cue token -> sound-id (master sound registry, tables.pak
a2c8c185=eng / b04238e0=jpn, schema 0x13cb84ba)
3. sound-id -> [start,end) scan the stream for trailer(id) and its
predecessor; cue audio = the bytes between,
read continuously across chunk boundaries.
Validated: decoded voice length matches each movie within ~0.4s, including
cross-boundary cues (ADV/RT01A/RT01B/RT01C/S00A/S01A + the 5 bound hokyu).
## Changes
- sylpheed-formats/src/movie_voice.rs (new): registry_voice_ids(),
find_descriptor(), find_descriptor_before() (gap-tolerant predecessor).
Unit-tested.
- viewer iso_loader.rs: resolve_movie_voice_region() + decode_voice_region()
(continuous read via existing read_segment_range + to_xma_riffs). Voice/
audio requests now region-first; a `\Movie\` token that fails region stays
SILENT (never plays the wrong off-by-one chunk). Removed the old
movie_is_demo_based suppress hack.
- Anchor tries subdirs Movie/etc/Voice so hokyu `\etc\VOICE_D_*` resolve too.
- Examples resolve_all/validate_cues/hokyu_final document + validate the pipeline.
## Status
- RT / S / ADV cutscene voices: CORRECT (user-confirmed).
- 5 manifest-bound hokyu (VOICE_D_450-454): CORRECT (user-confirmed).
## OPEN (handoff)
13 of 18 hokyu movies have NO manifest VOICETRACK; the game reuses the 5
recordings across stages via a code rule. `hokyu_fallback_token()` currently
guesses by category (ship LS/DS x source carrier-A/tanker-H: LS/A->450,
LS/H->453, DS/A->452, DS/H->454). USER REPORTS THIS IS SOMETIMES WRONG.
- LS/carrier has two takes (450 from s02A, 451 from s09A); the early-vs-late
split is unknown — unbound LS/A currently all default to 450.
- Definitive fix = Canary `--phase_a_fileio_only` file.read trace of an unbound
hokyu (e.g. hokyu_LS_s03A) to see which VOICE_D the game actually streams,
then encode the real rule. Same method that cracked the RT mapping.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
list_voice_clips now enumerates every spoken-line category so the standalone audio player covers them all — bound movie voices (\Movie\), in-mission radio (\Voice\, \etc\), and mission briefings (\Briefing\, whose BR<NN>_<MM> names lack "VOICE"); music (BGM_*) stays excluded.
Viewer voice-library fixes: invalidate the library when a new game source loads, and don't latch an empty result as "loaded" (sounds.tbl always has thousands of clips, so empty = a failed read) so re-opening the menu retries.
Voice decode reverted to the first sub-wave (base behaviour): a naive multi-sub-wave concat produced the wrong track for RT movies. The per-sub-wave splitter (to_xma_riffs) is kept + documented for the eventual real fix, which needs ground-truth playback instrumentation to resolve segments-vs-takes-vs-timecode placement.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
The movie cutscene subtitle + voice pipeline, driven by the ADVERTISE_MOVIE
manifest (the authoritative movie -> subtitle -> voice index). Also flushes
several sessions of local WIP (async viewer loading, grouped-pool XBG7/hero-ship
decode, drawlog tooling). See docs/HANDOFF-movie-voice-subtitles-2026-07-19.md.
Subtitles (movie_subtitle.rs):
- Full movie->track->text chain; join multi-line captions sharing one timing
(fixes S13A dropped "Look at it father" line); overlap-safe active_cues();
Latin-1 accents preserved.
Voice (slb.rs): XACT .slb -> XMA1 RIFF; take the FIRST sub-wave bounded by its
declared data size (fixes S10-S16 alternate-take garble); list_voice_clips.
Manifest (movie_manifest.rs): parse ADVERTISE_MOVIE (0x5B983A08) for the real
movie->voice binding (not always VOICE_<movie>; e.g. hokyu -> VOICE_D_* in etc\).
Resolve the token's sound.pak path via sounds.tbl. DIRECT bindings only — the
demo-id shared-clip fallback for unbound hokyu movies was verified WRONG in-game
and reverted (unbound hokyu stay unvoiced; correct join key is an OPEN problem).
Viewer: manifest-driven voice (movie player toggle + solo button), standalone
"Voice Lines" browser, stacked caption overlay.
Tests: 46 formats-lib + 11 viewer-lib + movie_manifest/movie_subtitle/slb disc
tests; full workspace green.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
