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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 | 1x 1x 7x 7x 4x 2x 2x 2x 1x 1x 1x 1x 1x 1x 1x 1x 1x 1x 2x 2x 2x 2x 2x 2x 2x 1x 1x 1x 1x 1x 1x 9x 10x | import { IAudioSource, AudioSource } from "./audioSource.js";
export interface IAudioSources extends Map<string, IAudioSource> {
add(...audios: Array<string>): void;
remove(...audios: Array<string>): void;
loadAsync(): Promise<void>;
}
export class AudioSources extends Map<string, IAudioSource> implements IAudioSources {
private readonly _audioPaths: Array<string>;
public constructor() {
super();
this._audioPaths = new Array<string>();
}
public add(...audios: Array<string>): void {
this._audioPaths.push(...audios);
}
public remove(...audios: Array<string>): void {
audios.forEach(audio => {
const index = this._audioPaths.indexOf(audio);
if (index < 0 || index >= this._audioPaths.length)
return;
this._audioPaths.splice(index, 1);
this.delete(audio);
});
}
public async loadAsync(): Promise<void> {
const audioContext = new AudioContext();
await Promise.all(this._audioPaths.map(async (audioPath): Promise<void> => {
await this.loadAudioAsync(audioPath, audioContext);
}));
await audioContext.resume();
}
private async loadAudioAsync(audioPath: string, audioContext: AudioContext): Promise<void> {
let loaded = false;
const request = new XMLHttpRequest();
const onRequestLoaded = (): void => {
request.removeEventListener("error", onRequestLoaded);
request.removeEventListener("load", onRequestLoaded);
const createBuffer = (audioBuffer: AudioBuffer): void => {
const audioSource = new AudioSource(audioBuffer, audioContext);
this.set(audioPath.split('/').pop()!, audioSource);
}
audioContext.decodeAudioData(request.response, createBuffer);
loaded = true;
};
request.responseType = "arraybuffer";
request.open("GET", audioPath, true);
request.addEventListener("error", onRequestLoaded);
request.addEventListener("load", onRequestLoaded);
request.send();
while (!loaded) {
await this.delay(1);
}
}
private delay(ms: number): Promise<unknown> {
return new Promise((resolve): any => setTimeout(resolve, ms));
}
} |