[中] 播放时每个帧信号都扫描整条时间线
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Assessment
- Difficulty
- 3/5
- Estimated time
- Half a day
- Newbie friendliness
- 50/100
- Issue type
- Refactor
- Clarity
- Clearly specified
- Activity status
- Active
- Tech stack
- python
- Domain
- performance
Research direction
Start at windows/birdlock/app/timeline.py:71, where TransportBar.refresh() subscribes to every state.changed, then read :89-93 and follow st.job.mixed_audio into windows/birdlock/core/render.py:418-424 to see the per-frame scan of output_frames. Check windows/birdlock/app/state.py:1223 for what the frame emit carries versus the audio/job/settings/analysis/phase keys. Done means playback no longer triggers a full timeline scan per frame — verify by profiling the GUI thread on a long project with an audio track.
Written by the indexing model from the issue text.
Description
位置：windows/birdlock/app/timeline.py:71、:89-93；windows/birdlock/core/render.py:418-424；windows/birdlock/app/state.py:1223
现象：TransportBar.refresh() 订阅了任意 state.changed，每次都调用 st.job.mixed_audio(st.audio)，后者做 resolve()、mute_bursts() 并逐帧扫描 output_frames。播放时每个输出帧都会 emit("frame")，60 fps 下每秒几十次全时间线扫描。
复现：播放一个带音轨的长工程，观察 GUI 线程占用。
建议：只订阅 ("audio","job","settings","analysis","phase")，或在 job/audio 变化时缓存 sound_active。
来源：2026-11-15 全仓只读审计，PR #7 未包含此项。 未在 Windows 实机复现，复现路径由代码审计推得。
- Dominant language
- Swift
- Stars
- 2
- Forks
- 2
- Avg merge
- 1h 11m
- Merged PRs (30d)
- 2
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First steps
- Read the whole issue, then the project's contributing guide.
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