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fix memory leak #8

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fix memory leak #8

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10 changes: 9 additions & 1 deletion clients/web/src/audio.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ let startSeek: number;
const songs: Record<string, Promise<AudioBuffer>> = {};

export const history = reactive<Array<Song>>([]);
export const volume = ref<number>(JSON.parse(localStorage.getItem("volume") ?? (10 ** (-10/20) + "")));
export const volume = ref<number>(JSON.parse(localStorage.getItem("volume") ?? (10 ** (-10 / 20) + "")));
// default volume of -10dBFS is approximately 0.31 linearly (or exactly 1/sqrt(10)!)

export const volumeDbfs = computed({
Expand Down Expand Up @@ -71,6 +71,14 @@ export async function play(song: Song, seek: number) {
buffer: await (songs[url] ?? preload(url)),
});

audioSource.addEventListener("ended", function () {
// important: disconnect called in event after stop(): https://stackoverflow.com/a/53263710/13160456
this.disconnect();
// this is meant to act as cache? its a lot of stuff to keep in memory
// despite being so infrequently re-accessed
delete songs[url];
});

audioSource.connect(audioAnalyser).connect(audioGain).connect(audioCtx.destination);

seek = Math.max(0, seek + currentTimestamp() - then); // time to create the audio node should be counted
Expand Down