Lightningbeam/daw-backend
Skyler Lehmkuhl 8ed2320dca Type AudioClip duration by clip kind; fix MIDI clips growing too fast
The MIDI-clip-end-grows-too-fast bug was a units confusion: AudioClip.duration
is documented "seconds" but MIDI clips store their length in BEATS (they share
the AudioClip struct with sampled clips). The timeline's effective_clip_duration
read it as raw seconds, so at 120 BPM a MIDI clip rendered ~2x too long. The old
backend-snapshot display had hidden this by forcing timeline_duration in beats.

Root fix — make the domain explicit and unforgeable:
- `duration` is now a private field. Reading it in the wrong unit is impossible
  because access goes through typed accessors: AudioClip::content_duration() ->
  ClipDuration (a Seconds|Beats enum tagged by clip_type) and
  set_content_duration(). serde still serializes the private field, so the .beam
  format is unchanged (bare number).
- ClipDuration::to_seconds(tempo_map) for display/sizing; ::native() for code
  that already works in the clip's native domain (trim math shares it).
- get_clip_duration + the timeline-endpoint calc go through to_seconds, so MIDI
  is converted correctly; effective_clip_duration delegates to get_clip_duration.
- Recording mirrors (audio/MIDI progress + finalize) write via set_content_duration
  (debug-asserts the value's domain matches the clip type).

Every former raw read/write of the field (core actions, timeline, piano roll,
infopanel, asset library, recording handlers) now goes through the accessors.
Whole workspace compiles; 299 core tests pass.
2026-07-11 19:23:37 -04:00
..
examples midi import in daw backend 2025-10-18 21:46:40 -04:00
src Type the rest of the audio-controller boundary (no more bare-f64 wrapping) 2026-07-11 14:33:22 -04:00
tests Pack video into .beam and stream frames + audio from the blob 2026-06-22 09:17:10 -04:00
C2.mp3 Work on daw backend 2025-10-18 18:09:07 -04:00
Cargo.lock Type AudioClip duration by clip kind; fix MIDI clips growing too fast 2026-07-11 19:23:37 -04:00
Cargo.toml Pack video into .beam and stream frames + audio from the blob 2026-06-22 09:17:10 -04:00
darude-sandstorm.mid midi import in daw backend 2025-10-18 21:46:40 -04:00
daw_architecture_doc.md Work on daw backend 2025-10-18 18:09:07 -04:00
test.wav Work on daw backend 2025-10-18 18:09:07 -04:00
ttls.mid Add audio node graph editing 2025-10-25 03:29:54 -04:00