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hold single AudioContext instance

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This commit is contained in:
Jörg Breitbart
2018-11-15 00:16:52 +01:00
parent e4e5b966da
commit 9faebaf5fe
1 changed files with 22 additions and 16 deletions
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src/SoundManager.ts
+22 -16
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@@ -12,7 +12,19 @@ import { ITerminal, ISoundManager } from './Types';
export const DEFAULT_BELL_SOUND = 'data:audio/wav;base64,UklGRigBAABXQVZFZm10IBAAAAABAAEARKwAAIhYAQACABAAZGF0YQQBAADpAFgCwAMlBZoG/wdmCcoKRAypDQ8PbRDBEQQTOxRtFYcWlBePGIUZXhoiG88bcBz7HHIdzh0WHlMeZx51HmkeUx4WHs8dah0AHXwc3hs9G4saxRnyGBIYGBcQFv8U4RPAEoYRQBACD70NWwwHC6gJOwjWBloF7gOBAhABkf8b/qv8R/ve+Xf4Ife79W/0JfPZ8Z/wde9N7ijtE+wU6xvqM+lb6H7nw+YX5mrlxuQz5Mzje+Ma49fioeKD4nXiYeJy4pHitOL04j/jn+MN5IPkFOWs5U3mDefM55/ogOl36m7rdOyE7abuyu8D8Unyj/Pg9D/2qfcb+Yn6/vuK/Qj/lAAlAg==';
export class SoundManager implements ISoundManager {
private _audioContext: AudioContext;
private static _audioContext: AudioContext;
static get audioContext(): AudioContext {
if (!SoundManager._audioContext) {
const audioContextCtor: typeof AudioContext = (<any>window).AudioContext || (<any>window).webkitAudioContext;
if (!audioContextCtor) {
console.warn('Web Audio API is not supported by this browser. Consider upgrading to the latest version');
return null;
}
this._audioContext = new audioContextCtor();
}
return SoundManager._audioContext;
}
constructor(
private _terminal: ITerminal
@@ -20,22 +32,16 @@ export class SoundManager implements ISoundManager {
}
public playBellSound(): void {
const audioContextCtor: typeof AudioContext = (<any>window).AudioContext || (<any>window).webkitAudioContext;
if (!this._audioContext && audioContextCtor) {
this._audioContext = new audioContextCtor();
}
if (this._audioContext) {
const bellAudioSource = this._audioContext.createBufferSource();
const context = this._audioContext;
this._audioContext.decodeAudioData(this._base64ToArrayBuffer(this._removeMimeType(this._terminal.options.bellSound)), (buffer) => {
bellAudioSource.buffer = buffer;
bellAudioSource.connect(context.destination);
bellAudioSource.start(0);
});
} else {
console.warn('Sorry, but the Web Audio API is not supported by your browser. Please, consider upgrading to the latest version');
const context = SoundManager.audioContext;
if (!context) {
return;
}
const bellAudioSource = context.createBufferSource();
context.decodeAudioData(this._base64ToArrayBuffer(this._removeMimeType(this._terminal.options.bellSound)), (buffer) => {
bellAudioSource.buffer = buffer;
bellAudioSource.connect(context.destination);
bellAudioSource.start(0);
});
}
private _base64ToArrayBuffer(base64: string): ArrayBuffer {