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docs: record Phase 1.2 Wave 2 progress; update PLAN.md and DeepDrftPublic.Client CLAUDE.md

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2026-06-11 09:13:04 -04:00
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@@ -32,7 +32,7 @@ These were flagged during the audit but classified as feature work, not defect f
- Client side: the JS decoder is currently a WAV byte-walker. For non-WAV, the simplest path is `decodeAudioData` over the full payload (loses streaming-start). The richer path is per-format chunked decoders. Worth a design pass before committing.
- **Prerequisite:** None functionally, but consider settling **Phase 4 (HTTP Range)** first — native range/cache is much more important for large MP3s than for WAVs.
- **Constraint:** Spectrum FFT tap currently relies on raw `AudioBuffer`s through `decodeAudioData`. If a future path uses `MediaElementAudioSourceNode` (see 4.1), the FFT tap still works but the early-playback story changes.
- **Progress:** Wave 1 (foundation) landed on `dev` (2026-06-10). Format router (`Mp3AudioProcessor`, `FlacAudioProcessor`, `AudioProcessorRouter`) and client-side `IFormatDecoder` interface + `WavFormatDecoder` implementation are in place. `TrackContentService.AddTrackAsync` is the new format-agnostic primary method; `AddTrackFromWavAsync` is a shim. Client `StreamDecoder` is now format-agnostic; WAV-specific logic moved to `WavFormatDecoder`. Wave 2 (per-format chunked decoders) and Wave 3 (full wiring) pending.
- **Progress:** Wave 1 (foundation) landed on `dev` (2026-06-10). Format router (`Mp3AudioProcessor`, `FlacAudioProcessor`, `AudioProcessorRouter`) and client-side `IFormatDecoder` interface + `WavFormatDecoder` implementation are in place. `TrackContentService.AddTrackAsync` is the new format-agnostic primary method; `AddTrackFromWavAsync` is a shim. Client `StreamDecoder` is now format-agnostic; WAV-specific logic moved to `WavFormatDecoder`. Wave 2 (per-format chunked decoders) landed on `dev` (2026-06-11): `Mp3FormatDecoder` and `FlacFormatDecoder` are implemented modules at `DeepDrftPublic/Interop/audio/`; `IFormatDecoder.getAlignedSegmentSize` extended with optional `rawData` parameter for format-specific frame-boundary scanning; `StreamDecoder.tryDecodeNextSegment` updated to peek candidate bytes and pass them via `rawData`, using zero-copy `subarray` for segments. Wave 3 (wiring decoders into `AudioPlayer.createFormatDecoder` factory; end-to-end integration) pending.
### 1.3 Preload / prefetch of the next track