28 lines
1.2 KiB
JavaScript
28 lines
1.2 KiB
JavaScript
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// Independent cleanup attempts: a broken optional recorder or audio node must
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// never keep the camera/microphone open or prevent the remaining owners closing.
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const attempt=operation=>{try{operation();}catch{/* Continue releasing other owners. */}};
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export function stopTracks(stream) {
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if(!stream)return;
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for(const track of stream.getTracks())attempt(()=>{track.onended=null;track.stop();});
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}
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export function releaseCapture(run,preview,finishRecording) {
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if(run.released)return;
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run.released=true;
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attempt(()=>stopTracks(run.stream));
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for(const timer of [run.timer,run.setupTimer,run.signalTimer])clearTimeout(timer);
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clearInterval(run.updateTimer);
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if(run.callback!=null)attempt(()=>preview.cancelVideoFrameCallback(run.callback));
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if(run.recording)attempt(finishRecording);
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if(run.node) {
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run.node.onprocessorerror=null;
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run.node.port.onmessage=null;
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attempt(()=>run.node.port.postMessage('stop'));
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attempt(()=>run.node.disconnect());
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}
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attempt(()=>run.source?.disconnect());
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// A rejected or unresolved AudioContext.close never postpones track release.
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attempt(()=>run.context?.close().catch(()=>{}));
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}
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