63 lines
5.2 KiB
JavaScript
63 lines
5.2 KiB
JavaScript
/*
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MIDI.audioDetect : 0.3
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-------------------------------------
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https://github.com/mudx/MIDI.js
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-------------------------------------
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Probably, Maybe, No... Absolutely!
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-------------------------------------
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Test to see what types of <audio> MIME types are playable by the browser.
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*/
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if (typeof(MIDI) === "undefined") var MIDI = {};
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(function() { "use strict";
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var supports = {};
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var canPlayThrough = function (src) {
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var audio = new Audio();
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var mime = src.split(";")[0];
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audio.id = "audio";
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audio.setAttribute("preload", "auto");
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audio.setAttribute("audiobuffer", true);
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audio.addEventListener("canplaythrough", function() {
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supports[mime] = true;
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}, false);
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audio.src = "data:" + src;
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document.body.appendChild(audio);
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};
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MIDI.audioDetect = function(callback) {
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// check whether <audio> tag is supported
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if (typeof(Audio) === "undefined") return callback({});
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// check whether canPlayType is supported
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var audio = new Audio();
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if (typeof(audio.canPlayType) === "undefined") return callback(supports);
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// see what we can learn from the browser
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var vorbis = audio.canPlayType('audio/ogg; codecs="vorbis"');
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vorbis = (vorbis === "probably" || vorbis === "maybe");
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var mpeg = audio.canPlayType('audio/mpeg');
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mpeg = (mpeg === "probably" || mpeg === "maybe");
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// maybe nothing is supported
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if (!vorbis && !mpeg) {
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callback(supports);
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return;
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}
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// or maybe something is supported
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if (vorbis) canPlayThrough("audio/ogg;base64,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");
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if (mpeg) canPlayThrough("audio/mpeg;base64,/+MYxAAAAANIAUAAAASEEB/jwOFM/0MM/90b/+RhST//w4NFwOjf///PZu////9lns5GFDv//l9GlUIEEIAAAgIg8Ir/JGq3/+MYxDsLIj5QMYcoAP0dv9HIjUcH//yYSg+CIbkGP//8w0bLVjUP///3Z0x5QCAv/yLjwtGKTEFNRTMuOTeqqqqqqqqqqqqq/+MYxEkNmdJkUYc4AKqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq");
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// lets find out!
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var time = (new Date()).getTime();
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var interval = window.setInterval(function() {
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for (var key in supports) {}
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var now = (new Date()).getTime();
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var maxExecution = now - time > 5000;
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if (key || maxExecution) {
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window.clearInterval(interval);
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callback(supports);
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}
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}, 1);
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};
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})(); |