1.4 KiB
1.4 KiB
08. Implement Real-Time Waveform Rendering During Playback
meta: id: merged-waveform-08 feature: merged-waveform priority: P2 depends_on: [merged-waveform-07] tags: [audio, realtime, rendering]
objective:
- Update waveform in real-time during audio playback
- Highlight waveform based on current playback position
- Sync waveform with audio backend position updates
deliverables:
- Real-time waveform update logic
- Playback position highlighting
- Integration with audio backend position tracking
steps:
- Subscribe to audio backend position updates
- Update waveform data points based on playback position
- Implement playback position highlighting
- Add animation for progress indicator
- Test synchronization with audio playback
tests:
- Integration: Test waveform sync with audio playback
- Performance: Measure real-time update overhead
- Visual: Verify progress highlighting matches audio position
acceptance_criteria:
- Waveform updates in real-time during playback
- Playback position is accurately highlighted
- No lag or desynchronization with audio
validation:
- Play audio and watch waveform update
- Verify progress bar matches audio position
- Test with different playback speeds
notes:
- Use existing audio position polling in
useAudio.ts - Update waveform every ~100ms for smooth visuals
- Consider reducing waveform resolution during playback for performance
- Ensure highlighting doesn't flicker