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