87 lines
1.9 KiB
JavaScript
87 lines
1.9 KiB
JavaScript
(function() {
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function loopify(uri,cb) {
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var context = new (window.AudioContext || window.webkitAudioContext)(),
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request = new XMLHttpRequest();
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request.responseType = "arraybuffer";
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request.open("GET", uri, true);
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// XHR failed
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request.onerror = function() {
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cb(new Error("Couldn't load audio from " + uri));
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};
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// XHR complete
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request.onload = function() {
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context.decodeAudioData(request.response,success,function(err){
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// Audio was bad
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cb(new Error("Couldn't decode audio from " + uri));
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});
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};
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request.send();
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function success(buffer) {
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var source;
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function play() {
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// Stop if it's already playing
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stop();
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// Create a new source (can't replay an existing source)
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source = context.createBufferSource();
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source.connect(context.destination);
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var gainNode = context.createGain();
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gainNode.gain.value = -0.8;
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gainNode.connect(context.destination);
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source.connect(gainNode);
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document.getElementById('volume').addEventListener('change', function() {
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gainNode.gain.value = this.value;
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});
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// Set the buffer
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source.buffer = buffer;
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source.loop = true;
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// Play it
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source.start(0);
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}
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function stop() {
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// Stop and clear if it's playing
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if (source) {
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source.stop();
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source = null;
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}
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}
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cb(null,{
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play: play,
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stop: stop
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});
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}
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}
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loopify.version = "0.1";
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if (typeof define === "function" && define.amd) {
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define(function() { return loopify; });
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} else if (typeof module === "object" && module.exports) {
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module.exports = loopify;
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} else {
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this.loopify = loopify;
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}
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})(); |