99 lines
2.4 KiB
JavaScript
99 lines
2.4 KiB
JavaScript
//(Math.exp(x)-1)/(Math.E-1)
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//🔊
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class bufferLoader {
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constructor(context, soundMap, callback) {
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this.context = context;
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this.soundMap = soundMap;
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this.onloadUpdate = callback;
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this.bufferList = {};
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this.loadCount = 0;
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}
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load() {
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for (let s of this.soundMap) {
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this.loadBuffer(s.FileName, s.Label);
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}
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}
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loadBuffer(url, name) {
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return new Promise((resolve, reject) => {
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try
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{
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// Load buffer asynchronously
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fetch(url)
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.then((response) => {
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if(response.status !== 200) {
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if(this.onloadUpdate) {
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this.onloadUpdate((++this.loadCount / this.soundMap.length) * 100);
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}
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reject(response); return;
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}
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response.arrayBuffer().then((buffer) => {
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// Asynchronously decode the audio file data in request.response
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this.context.decodeAudioData(buffer, (buf) => {
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if (!buf) {
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reject('error decoding file data: ' + url);
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}
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this.bufferList[name] = buf;
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if(this.onloadUpdate) {
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this.onloadUpdate((++this.loadCount / this.soundMap.length) * 100);
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}
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resolve(`${this.loadCount}|${this.soundMap.length}`);
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},
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function(error) {
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console.log(error);
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console.log(`url: ${url}, name: ${name}`);
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if(this.onloadUpdate) {
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this.onloadUpdate((++this.loadCount / this.soundMap.length) * 100);
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}
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reject(error);
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}
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);
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});
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}, (failure) => {
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console.log(failure);
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reject(failure);
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});
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} catch(error) {
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console.log(error);
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reject(error);
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}
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});
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}
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}
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class audioController {
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constructor() {
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this.volume = 1.0;
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this.muted = false;
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this.audioCtx = new (window.AudioContext || window.webkitAudioContext)();
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this.gainNode = this.audioCtx.createGain();
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this.loader = undefined;
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}
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changeVolume(vol) {
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this.volume = (Math.exp(vol)-1)/(Math.E-1);
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if(!this.muted) {
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this.gainNode.gain.setValueAtTime(this.volume, this.audioCtx.currentTime);
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}
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}
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mute() {
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this.muted = !this.muted;
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if(this.muted) {
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this.gainNode.gain.setValueAtTime(0, athis.udioCtx.currentTime);
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} else {
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this.gainNode.gain.setValueAtTime(this.volume, this.audioCtx.currentTime);
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}
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}
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loadSounds(soundMap, callback) {
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this.loader = new bufferLoader(this.audioCtx, soundMap, (percent) => {
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if (callback) {
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callback(percent);
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}
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});
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this.loader.load();
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}
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} |