Media browser work in progress

Play every sound - and watch every cutscene - on the disc straight from your browser. Pick your .bin Mode2/2352 image once, then flip between three categories: BGM sequenced music (VAB + SEQ), the FMV movies (MV*.STR, decoded and played with synced MDEC video), and the SE sound banks (XA*.XA, each holding several interleaved voices). The same WASM build that powers the asset viewer parses, decodes, and plays everything locally - nothing leaves your machine. Your disc is cached locally in the browser and shared across pages, so it auto-loads on reload (use Forget to clear).

Load your disc image

Choose file: No disc loaded.

Requires the full Mode2/2352 .bin - XA streams live in CD sectors outside PROT.DAT. The browser autoplay policy means BGM will only start after you click Play.

Browse

BGM playback drives the same clean-room SPU + SEQ stack the engine port uses (legaia_engine_audio::Sequencer + WebAudioOut through a ScriptProcessorNode).

MV*.STR files carry interleaved MDEC video + XA audio. Playing one decodes the XA audio and drives the MDEC video off the audio clock, frame by frame - the same clean-room decoders the engine port uses (legaia-mdec + legaia-xa). Decode can take a few seconds for the longer streams; the button stays in “decoding…” while it works.

Each XA*.XA file is a CD-XA bank holding several interleaved voices - one per (file_no, ch_no) sub-stream - not a single track. Click a file to demux it and list the voices it contains; each one decodes to XA-ADPCM audio independently (legaia-xa::demux + decode). Demuxing a bank decodes every voice in it, so the first click can take a moment.

Notes

All decoded media stays in your browser. Decoders live in crates/web-viewer: VAB via legaia-vab::decode_vag, SEQ via legaia_engine_audio::Sequencer, XA-ADPCM via legaia-xa::decode, and the Iki MDEC cutscene video via legaia-mdec (frames assembled off the disc, then decoded one at a time as the movie plays). The clean-room SPU behind BGM is documented at subsystems / audio.

Browser playback sounding wrong? Hit the .wav button to download a raw PCM dump and play it in VLC / ffplay. The dumped bytes are byte-equal to ./target/release/xa demux-disc output (proven by audio_parity.rs) - that's the canonical ground-truth reference. If the downloaded .wav sounds correct but in-browser playback doesn't, the disconnect is on the WebAudio side rather than in the decoder.