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Create AudioContext only when needed

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Fedor Indutny 2023-02-08 07:05:50 -08:00 • committed by GitHub
parent ee55014049
commit 27d44a746c
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2 changed files with 14 additions and 3 deletions
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8
ts/components/GlobalAudioContext.tsx
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@ -26,8 +26,7 @@ export type Contents = {
// and instantiate these inside of `GlobalAudioProvider`. (We may wish to keep // and instantiate these inside of `GlobalAudioProvider`. (We may wish to keep
// `audioContext` global, however, as the browser limits the number that can be // `audioContext` global, however, as the browser limits the number that can be
// created.) // created.)
const audioContext = new AudioContext(); let audioContext: AudioContext | undefined;
void audioContext.suspend();
const waveformCache: WaveformCache = new LRU({ const waveformCache: WaveformCache = new LRU({
max: MAX_WAVEFORM_COUNT, max: MAX_WAVEFORM_COUNT,
@ -106,6 +105,11 @@ async function doComputePeaks(
return emptyResult; return emptyResult;
} }
if (!audioContext) {
audioContext = new AudioContext();
await audioContext.suspend();
}
const data = await audioContext.decodeAudioData(raw); const data = await audioContext.decodeAudioData(raw);
// Compute RMS peaks // Compute RMS peaks

9
ts/util/Sound.ts
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@ -11,7 +11,7 @@ export type SoundOpts = {
export class Sound { export class Sound {
static sounds = new Map(); static sounds = new Map();
private readonly context = new AudioContext(); private static context: AudioContext | undefined;
private readonly loop: boolean; private readonly loop: boolean;
@ -59,6 +59,13 @@ export class Sound {
} }
} }
private get context(): AudioContext {
if (!Sound.context) {
Sound.context = new AudioContext();
}
return Sound.context;
}
static async loadSoundFile(src: string): Promise<ArrayBuffer> { static async loadSoundFile(src: string): Promise<ArrayBuffer> {
const xhr = new XMLHttpRequest(); const xhr = new XMLHttpRequest();