95 lines
2.8 KiB
JavaScript
95 lines
2.8 KiB
JavaScript
/*
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MIDI.loadPlugin(callback, type);
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-------------------------------------
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https://github.com/mudx/MIDI.js
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-------------------------------------
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*/
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if (typeof (MIDI) === "undefined") var MIDI = {};
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if (typeof (MIDI.Soundfont) === "undefined") MIDI.Soundfont = {};
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(function() { "use strict";
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var plugins = { "#webaudio": true, "#html5": true, "#java": true, "#flash": true };
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MIDI.loadPlugin = function(callback, instrument) {
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var type, loader;
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var instrument = instrument || "";
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MIDI.audioDetect(function(types) {
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// use the most appropriate plugin if not specified
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if (typeof(type) === 'undefined') {
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if (plugins[window.location.hash]) {
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type = window.location.hash;
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} else {
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type = "";
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}
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}
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if (type === "") {
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var isSafari = navigator.userAgent.toLowerCase().indexOf("safari") !== -1;
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if (window.webkitAudioContext) { // Chrome
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type = "#webaudio";
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} else if (window.Audio && isSafari === false) { // Firefox
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type = "#html5";
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} else { // Safari and Internet Explorer
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type = "#flash";
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}
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}
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// use audio/ogg when supported
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var filetype = types["audio/ogg"] ? "ogg" : "mp3";
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// load the specified plugin
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switch (type) {
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case "#java":
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// works well cross-browser, and highly featured, but required Java machine to startup
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if (loader) loader.message("Soundfont (500KB)<br>Java Interface...");
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MIDI.Java.connect(callback);
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break;
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case "#flash":
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// fairly quick, but requires loading of individual MP3s
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if (loader) loader.message("Soundfont (2MB)<br>Flash Interface...");
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DOMLoader.script.add({
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src: "./inc/SoundManager2/script/soundmanager2.js",
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verify: "SoundManager",
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callback: function () {
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MIDI.Flash.connect(callback);
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}
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});
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break;
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case "#html5":
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// works well in Firefox
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DOMLoader.sendRequest({
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url: "./soundfont/soundfont-" + filetype + ".js",
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callback: function (response) {
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MIDI.Soundfont = JSON.parse(response.responseText);
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if (loader) loader.message("Downloading: 100%<br>Processing...");
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MIDI.HTML5.connect(callback);
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},
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progress: function (evt) {
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var percent = evt.loaded / 1719931 * 100 >> 0;
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if (loader) loader.message("Downloading: " + (percent + "%"));
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}
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});
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break;
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case "#webaudio":
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// works well in Chrome
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DOMLoader.sendRequest({
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url: "./soundfont/soundfont-" + filetype + instrument + ".js",
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callback: function(response) {
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MIDI.Soundfont = JSON.parse(response.responseText);
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if (loader) loader.message("Downloading: 100%<br>Processing...");
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MIDI.WebAudioAPI.connect(callback);
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},
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progress: function (evt) {
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var percent = evt.loaded / 1719931 * 100 >> 0;
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if (loader) loader.message("Downloading: " + (percent + "%"));
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}
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});
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break;
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default:
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break;
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}
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});
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};
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})(); |