Mercurial > hg > env-test-daniele

/*!
* MediaElement.js
* HTML5 <video> and <audio> shim and player
* http://mediaelementjs.com/
*
* Creates a JavaScript object that mimics HTML5 MediaElement API
* for browsers that don't understand HTML5 or can't play the provided codec
* Can play MP4 (H.264), Ogg, WebM, FLV, WMV, WMA, ACC, and MP3
*
* Copyright 2010-2011, John Dyer (http://j.hn)
* Dual licensed under the MIT or GPL Version 2 licenses.
*
*/
// Namespace
var mejs = mejs || {};

// version number
mejs.version = '2.1.9';

// player number (for missing, same id attr)
mejs.meIndex = 0;

// media types accepted by plugins
mejs.plugins = {
	silverlight: [
		{version: [3,0], types: ['video/mp4','video/m4v','video/mov','video/wmv','audio/wma','audio/m4a','audio/mp3','audio/wav','audio/mpeg']}
	],
	flash: [
		{version: [9,0,124], types: ['video/mp4','video/m4v','video/mov','video/flv','video/x-flv','audio/flv','audio/x-flv','audio/mp3','audio/m4a','audio/mpeg']}
		//,{version: [11,0], types: ['video/webm']} // for future reference
	]
};

/*
Utility methods
*/
mejs.Utility = {
	encodeUrl: function(url) {
		return encodeURIComponent(url); //.replace(/\?/gi,'%3F').replace(/=/gi,'%3D').replace(/&/gi,'%26');
	},
	escapeHTML: function(s) {
		return s.toString().split('&').join('&amp;').split('<').join('&lt;').split('"').join('&quot;');
	},
	absolutizeUrl: function(url) {
		var el = document.createElement('div');
		el.innerHTML = '<a href="' + this.escapeHTML(url) + '">x</a>';
		return el.firstChild.href;
	},
	getScriptPath: function(scriptNames) {
		var
			i = 0,
			j,
			path = '',
			name = '',
			script,
			scripts = document.getElementsByTagName('script');

		for (; i < scripts.length; i++) {
			script = scripts[i].src;
			for (j = 0; j < scriptNames.length; j++) {
				name = scriptNames[j];
				if (script.indexOf(name) > -1) {
					path = script.substring(0, script.indexOf(name));
					break;
				}
			}
			if (path !== '') {
				break;
			}
		}
		return path;
	},
	secondsToTimeCode: function(seconds,forceHours) {
		seconds = Math.round(seconds);
		var hours,
		    minutes = Math.floor(seconds / 60);
		if (minutes >= 60) {
		    hours = Math.floor(minutes / 60);
		    minutes = minutes % 60;
		}
		hours = hours === undefined ? "00" : (hours >= 10) ? hours : "0" + hours;
		minutes = (minutes >= 10) ? minutes : "0" + minutes;
		seconds = Math.floor(seconds % 60);
		seconds = (seconds >= 10) ? seconds : "0" + seconds;
		return ((hours > 0 || forceHours === true) ? hours + ":" :'') + minutes + ":" + seconds;
	},
	timeCodeToSeconds: function(timecode){
		var tab = timecode.split(':');
		return tab[0]*60*60 + tab[1]*60 + parseFloat(tab[2].replace(',','.'));
	}
};


// Core detector, plugins are added below
mejs.PluginDetector = {

	// main public function to test a plug version number PluginDetector.hasPluginVersion('flash',[9,0,125]);
	hasPluginVersion: function(plugin, v) {
		var pv = this.plugins[plugin];
		v[1] = v[1] || 0;
		v[2] = v[2] || 0;
		return (pv[0] > v[0] || (pv[0] == v[0] && pv[1] > v[1]) || (pv[0] == v[0] && pv[1] == v[1] && pv[2] >= v[2])) ? true : false;
	},

	// cached values
	nav: window.navigator,
	ua: window.navigator.userAgent.toLowerCase(),

	// stored version numbers
	plugins: [],

	// runs detectPlugin() and stores the version number
	addPlugin: function(p, pluginName, mimeType, activeX, axDetect) {
		this.plugins[p] = this.detectPlugin(pluginName, mimeType, activeX, axDetect);
	},

	// get the version number from the mimetype (all but IE) or ActiveX (IE)
	detectPlugin: function(pluginName, mimeType, activeX, axDetect) {

		var version = [0,0,0],
			description,
			i,
			ax;

		// Firefox, Webkit, Opera
		if (typeof(this.nav.plugins) != 'undefined' && typeof this.nav.plugins[pluginName] == 'object') {
			description = this.nav.plugins[pluginName].description;
			if (description && !(typeof this.nav.mimeTypes != 'undefined' && this.nav.mimeTypes[mimeType] && !this.nav.mimeTypes[mimeType].enabledPlugin)) {
				version = description.replace(pluginName, '').replace(/^\s+/,'').replace(/\sr/gi,'.').split('.');
				for (i=0; i<version.length; i++) {
					version[i] = parseInt(version[i].match(/\d+/), 10);
				}
			}
		// Internet Explorer / ActiveX
		} else if (typeof(window.ActiveXObject) != 'undefined') {
			try {
				ax = new ActiveXObject(activeX);
				if (ax) {
					version = axDetect(ax);
				}
			}
			catch (e) { }
		}
		return version;
	}
};

// Add Flash detection
mejs.PluginDetector.addPlugin('flash','Shockwave Flash','application/x-shockwave-flash','ShockwaveFlash.ShockwaveFlash', function(ax) {
	// adapted from SWFObject
	var version = [],
		d = ax.GetVariable("$version");
	if (d) {
		d = d.split(" ")[1].split(",");
		version = [parseInt(d[0], 10), parseInt(d[1], 10), parseInt(d[2], 10)];
	}
	return version;
});

// Add Silverlight detection
mejs.PluginDetector.addPlugin('silverlight','Silverlight Plug-In','application/x-silverlight-2','AgControl.AgControl', function (ax) {
	// Silverlight cannot report its version number to IE
	// but it does have a isVersionSupported function, so we have to loop through it to get a version number.
	// adapted from http://www.silverlightversion.com/
	var v = [0,0,0,0],
		loopMatch = function(ax, v, i, n) {
			while(ax.isVersionSupported(v[0]+ "."+ v[1] + "." + v[2] + "." + v[3])){
				v[i]+=n;
			}
			v[i] -= n;
		};
	loopMatch(ax, v, 0, 1);
	loopMatch(ax, v, 1, 1);
	loopMatch(ax, v, 2, 10000); // the third place in the version number is usually 5 digits (4.0.xxxxx)
	loopMatch(ax, v, 2, 1000);
	loopMatch(ax, v, 2, 100);
	loopMatch(ax, v, 2, 10);
	loopMatch(ax, v, 2, 1);
	loopMatch(ax, v, 3, 1);

	return v;
});
// add adobe acrobat
/*
PluginDetector.addPlugin('acrobat','Adobe Acrobat','application/pdf','AcroPDF.PDF', function (ax) {
	var version = [],
		d = ax.GetVersions().split(',')[0].split('=')[1].split('.');

	if (d) {
		version = [parseInt(d[0], 10), parseInt(d[1], 10), parseInt(d[2], 10)];
	}
	return version;
});
*/
// necessary detection (fixes for <IE9)
mejs.MediaFeatures = {
	init: function() {
		var
			nav = mejs.PluginDetector.nav,
			ua = mejs.PluginDetector.ua.toLowerCase(),
			i,
			v,
			html5Elements = ['source','track','audio','video'];

		// detect browsers (only the ones that have some kind of quirk we need to work around)
		this.isiPad = (ua.match(/ipad/i) !== null);
		this.isiPhone = (ua.match(/iphone/i) !== null);
		this.isAndroid = (ua.match(/android/i) !== null);
		this.isBustedAndroid = (ua.match(/android 2\.[12]/) !== null);
		this.isIE = (nav.appName.toLowerCase().indexOf("microsoft") != -1);
		this.isChrome = (ua.match(/chrome/gi) !== null);
		this.isFirefox = (ua.match(/firefox/gi) !== null);

		// create HTML5 media elements for IE before 9, get a <video> element for fullscreen detection
		for (i=0; i<html5Elements.length; i++) {
			v = document.createElement(html5Elements[i]);
		}

		// detect native JavaScript fullscreen (Safari only, Chrome fails)
		this.hasNativeFullScreen = (typeof v.webkitRequestFullScreen !== 'undefined');
		if (this.isChrome) {
			this.hasNativeFullScreen = false;
		}
		// OS X 10.5 can't do this even if it says it can :(
		if (this.hasNativeFullScreen && ua.match(/mac os x 10_5/i)) {
			this.hasNativeFullScreen = false;
		}
	}
};
mejs.MediaFeatures.init();


/*
extension methods to <video> or <audio> object to bring it into parity with PluginMediaElement (see below)
*/
mejs.HtmlMediaElement = {
	pluginType: 'native',
	isFullScreen: false,

	setCurrentTime: function (time) {
		this.currentTime = time;
	},

	setMuted: function (muted) {
		this.muted = muted;
	},

	setVolume: function (volume) {
		this.volume = volume;
	},

	// for parity with the plugin versions
	stop: function () {
		this.pause();
	},

	// This can be a url string
	// or an array [{src:'file.mp4',type:'video/mp4'},{src:'file.webm',type:'video/webm'}]
	setSrc: function (url) {
		if (typeof url == 'string') {
			this.src = url;
		} else {
			var i, media;

			for (i=0; i<url.length; i++) {
				media = url[i];
				if (this.canPlayType(media.type)) {
					this.src = media.src;
				}
			}
		}
	},

	setVideoSize: function (width, height) {
		this.width = width;
		this.height = height;
	}
};

/*
Mimics the <video/audio> element by calling Flash's External Interface or Silverlights [ScriptableMember]
*/
mejs.PluginMediaElement = function (pluginid, pluginType, mediaUrl) {
	this.id = pluginid;
	this.pluginType = pluginType;
	this.src = mediaUrl;
	this.events = {};
};

// JavaScript values and ExternalInterface methods that match HTML5 video properties methods
// http://www.adobe.com/livedocs/flash/9.0/ActionScriptLangRefV3/fl/video/FLVPlayback.html
// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html
mejs.PluginMediaElement.prototype = {

	// special
	pluginElement: null,
	pluginType: '',
	isFullScreen: false,

	// not implemented :(
	playbackRate: -1,
	defaultPlaybackRate: -1,
	seekable: [],
	played: [],

	// HTML5 read-only properties
	paused: true,
	ended: false,
	seeking: false,
	duration: 0,
	error: null,

	// HTML5 get/set properties, but only set (updated by event handlers)
	muted: false,
	volume: 1,
	currentTime: 0,

	// HTML5 methods
	play: function () {
		if (this.pluginApi != null) {
			this.pluginApi.playMedia();
			this.paused = false;
		}
	},
	load: function () {
		if (this.pluginApi != null) {
			this.pluginApi.loadMedia();
			this.paused = false;
		}
	},
	pause: function () {
		if (this.pluginApi != null) {
			this.pluginApi.pauseMedia();
			this.paused = true;
		}
	},
	stop: function () {
		if (this.pluginApi != null) {
			this.pluginApi.stopMedia();
			this.paused = true;
		}
	},
	canPlayType: function(type) {
		var i,
			j,
			pluginInfo,
			pluginVersions = mejs.plugins[this.pluginType];

		for (i=0; i<pluginVersions.length; i++) {
			pluginInfo = pluginVersions[i];

			// test if user has the correct plugin version
			if (mejs.PluginDetector.hasPluginVersion(this.pluginType, pluginInfo.version)) {

				// test for plugin playback types
				for (j=0; j<pluginInfo.types.length; j++) {
					// find plugin that can play the type
					if (type == pluginInfo.types[j]) {
						return true;
					}
				}
			}
		}

		return false;
	},

	// custom methods since not all JavaScript implementations support get/set

	// This can be a url string
	// or an array [{src:'file.mp4',type:'video/mp4'},{src:'file.webm',type:'video/webm'}]
	setSrc: function (url) {
		if (typeof url == 'string') {
			this.pluginApi.setSrc(mejs.Utility.absolutizeUrl(url));
			this.src = mejs.Utility.absolutizeUrl(url);
		} else {
			var i, media;

			for (i=0; i<url.length; i++) {
				media = url[i];
				if (this.canPlayType(media.type)) {
					this.pluginApi.setSrc(mejs.Utility.absolutizeUrl(media.src));
					this.src = mejs.Utility.absolutizeUrl(url);
				}
			}
		}

	},
	setCurrentTime: function (time) {
		if (this.pluginApi != null) {
			this.pluginApi.setCurrentTime(time);
			this.currentTime = time;
		}
	},
	setVolume: function (volume) {
		if (this.pluginApi != null) {
			this.pluginApi.setVolume(volume);
			this.volume = volume;
		}
	},
	setMuted: function (muted) {
		if (this.pluginApi != null) {
			this.pluginApi.setMuted(muted);
			this.muted = muted;
		}
	},

	// additional non-HTML5 methods
	setVideoSize: function (width, height) {
		if ( this.pluginElement.style) {
			this.pluginElement.style.width = width + 'px';
			this.pluginElement.style.height = height + 'px';
		}
		if (this.pluginApi != null) {
			this.pluginApi.setVideoSize(width, height);
		}
	},

	setFullscreen: function (fullscreen) {
		if (this.pluginApi != null) {
			this.pluginApi.setFullscreen(fullscreen);
		}
	},

	// start: fake events
	addEventListener: function (eventName, callback, bubble) {
		this.events[eventName] = this.events[eventName] || [];
		this.events[eventName].push(callback);
	},
	removeEventListener: function (eventName, callback) {
		if (!eventName) { this.events = {}; return true; }
		var callbacks = this.events[eventName];
		if (!callbacks) return true;
		if (!callback) { this.events[eventName] = []; return true; }
		for (i = 0; i < callbacks.length; i++) {
			if (callbacks[i] === callback) {
				this.events[eventName].splice(i, 1);
				return true;
			}
		}
		return false;
	},
	dispatchEvent: function (eventName) {
		var i,
			args,
			callbacks = this.events[eventName];

		if (callbacks) {
			args = Array.prototype.slice.call(arguments, 1);
			for (i = 0; i < callbacks.length; i++) {
				callbacks[i].apply(null, args);
			}
		}
	}
	// end: fake events
};


// Handles calls from Flash/Silverlight and reports them as native <video/audio> events and properties
mejs.MediaPluginBridge = {

	pluginMediaElements:{},
	htmlMediaElements:{},

	registerPluginElement: function (id, pluginMediaElement, htmlMediaElement) {
		this.pluginMediaElements[id] = pluginMediaElement;
		this.htmlMediaElements[id] = htmlMediaElement;
	},

	// when Flash/Silverlight is ready, it calls out to this method
	initPlugin: function (id) {

		var pluginMediaElement = this.pluginMediaElements[id],
			htmlMediaElement = this.htmlMediaElements[id];

		// find the javascript bridge
		switch (pluginMediaElement.pluginType) {
			case "flash":
				pluginMediaElement.pluginElement = pluginMediaElement.pluginApi = document.getElementById(id);
				break;
			case "silverlight":
				pluginMediaElement.pluginElement = document.getElementById(pluginMediaElement.id);
				pluginMediaElement.pluginApi = pluginMediaElement.pluginElement.Content.MediaElementJS;
				break;
		}

		if (pluginMediaElement.pluginApi != null && pluginMediaElement.success) {
			pluginMediaElement.success(pluginMediaElement, htmlMediaElement);
		}
	},

	// receives events from Flash/Silverlight and sends them out as HTML5 media events
	// http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html
	fireEvent: function (id, eventName, values) {

		var
			e,
			i,
			bufferedTime,
			pluginMediaElement = this.pluginMediaElements[id];

		pluginMediaElement.ended = false;
		pluginMediaElement.paused = true;

		// fake event object to mimic real HTML media event.
		e = {
			type: eventName,
			target: pluginMediaElement
		};

		// attach all values to element and event object
		for (i in values) {
			pluginMediaElement[i] = values[i];
			e[i] = values[i];
		}

		// fake the newer W3C buffered TimeRange (loaded and total have been removed)
		bufferedTime = values.bufferedTime || 0;

		e.target.buffered = e.buffered = {
			start: function(index) {
				return 0;
			},
			end: function (index) {
				return bufferedTime;
			},
			length: 1
		};

		pluginMediaElement.dispatchEvent(e.type, e);
	}
};

/*
Default options
*/
mejs.MediaElementDefaults = {
	// allows testing on HTML5, flash, silverlight
	// auto: attempts to detect what the browser can do
	// native: forces HTML5 playback
	// shim: disallows HTML5, will attempt either Flash or Silverlight
	// none: forces fallback view
	mode: 'auto',
	// remove or reorder to change plugin priority and availability
	plugins: ['flash','silverlight'],
	// shows debug errors on screen
	enablePluginDebug: false,
	// overrides the type specified, useful for dynamic instantiation
	type: '',
	// path to Flash and Silverlight plugins
	pluginPath: mejs.Utility.getScriptPath(['mediaelement.js','mediaelement.min.js','mediaelement-and-player.js','mediaelement-and-player.min.js']),
	// name of flash file
	flashName: 'flashmediaelement.swf',
	// turns on the smoothing filter in Flash
	enablePluginSmoothing: false,
	// name of silverlight file
	silverlightName: 'silverlightmediaelement.xap',
	// default if the <video width> is not specified
	defaultVideoWidth: 480,
	// default if the <video height> is not specified
	defaultVideoHeight: 270,
	// overrides <video width>
	pluginWidth: -1,
	// overrides <video height>
	pluginHeight: -1,
	// rate in milliseconds for Flash and Silverlight to fire the timeupdate event
	// larger number is less accurate, but less strain on plugin->JavaScript bridge
	timerRate: 250,
	success: function () { },
	error: function () { }
};

/*
Determines if a browser supports the <video> or <audio> element
and returns either the native element or a Flash/Silverlight version that
mimics HTML5 MediaElement
*/
mejs.MediaElement = function (el, o) {
	return mejs.HtmlMediaElementShim.create(el,o);
};

mejs.HtmlMediaElementShim = {

	create: function(el, o) {
		var
			options = mejs.MediaElementDefaults,
			htmlMediaElement = (typeof(el) == 'string') ? document.getElementById(el) : el,
			isVideo = (htmlMediaElement.tagName.toLowerCase() == 'video'),
			supportsMediaTag = (typeof(htmlMediaElement.canPlayType) != 'undefined'),
			playback = {method:'', url:''},
			poster = htmlMediaElement.getAttribute('poster'),
			autoplay =  htmlMediaElement.getAttribute('autoplay'),
			preload =  htmlMediaElement.getAttribute('preload'),
			controls =  htmlMediaElement.getAttribute('controls'),
			prop;

		// extend options
		for (prop in o) {
			options[prop] = o[prop];
		}

		// check for real poster
		poster = (typeof poster == 'undefined' || poster === null) ? '' : poster;
		preload = (typeof preload == 'undefined' || preload === null || preload === 'false') ? 'none' : preload;
		autoplay = !(typeof autoplay == 'undefined' || autoplay === null || autoplay === 'false');
		controls = !(typeof controls == 'undefined' || controls === null || controls === 'false');

		// test for HTML5 and plugin capabilities
		playback = this.determinePlayback(htmlMediaElement, options, isVideo, supportsMediaTag);

		if (playback.method == 'native') {
			// second fix for android
			if (mejs.MediaFeatures.isBustedAndroid) {
				htmlMediaElement.src = playback.url;
				htmlMediaElement.addEventListener('click', function() {
						htmlMediaElement.play();
				}, true);
			}

			// add methods to native HTMLMediaElement
			return this.updateNative( htmlMediaElement, options, autoplay, preload, playback);
		} else if (playback.method !== '') {
			// create plugin to mimic HTMLMediaElement
			return this.createPlugin( htmlMediaElement, options, isVideo, playback.method, (playback.url !== null) ? mejs.Utility.absolutizeUrl(playback.url) : '', poster, autoplay, preload, controls);
		} else {
			// boo, no HTML5, no Flash, no Silverlight.
			this.createErrorMessage( htmlMediaElement, options, (playback.url !== null) ? mejs.Utility.absolutizeUrl(playback.url) : '', poster );
		}
	},

	determinePlayback: function(htmlMediaElement, options, isVideo, supportsMediaTag) {
		var
			mediaFiles = [],
			i,
			j,
			k,
			l,
			n,
			type,
			result = { method: '', url: ''},
			src = htmlMediaElement.getAttribute('src'),
			pluginName,
			pluginVersions,
			pluginInfo;

		// clean up src attr
		if (src == 'undefined' || src == '' || src === null)
			src = null;

		// STEP 1: Get URL and type from <video src> or <source src>

		// supplied type overrides all HTML
		if (typeof (options.type) != 'undefined' && options.type !== '') {
			mediaFiles.push({type:options.type, url:src});

		// test for src attribute first
		} else if (src  !== null) {
			type = this.checkType(src, htmlMediaElement.getAttribute('type'), isVideo);
			mediaFiles.push({type:type, url:src});

		// then test for <source> elements
		} else {
			// test <source> types to see if they are usable
			for (i = 0; i < htmlMediaElement.childNodes.length; i++) {
				n = htmlMediaElement.childNodes[i];
				if (n.nodeType == 1 && n.tagName.toLowerCase() == 'source') {
					src = n.getAttribute('src');
					type = this.checkType(src, n.getAttribute('type'), isVideo);
					mediaFiles.push({type:type, url:src});
				}
			}
		}

		// STEP 2: Test for playback method

		// special case for Android which sadly doesn't implement the canPlayType function (always returns '')
		if (mejs.MediaFeatures.isBustedAndroid) {
			htmlMediaElement.canPlayType = function(type) {
				return (type.match(/video\/(mp4|m4v)/gi) !== null) ? 'maybe' : '';
			};
		}


		// test for native playback first
		if (supportsMediaTag && (options.mode === 'auto' || options.mode === 'native')) {
			for (i=0; i<mediaFiles.length; i++) {
				// normal check
				if (htmlMediaElement.canPlayType(mediaFiles[i].type).replace(/no/, '') !== ''
					// special case for Mac/Safari 5.0.3 which answers '' to canPlayType('audio/mp3') but 'maybe' to canPlayType('audio/mpeg')
					|| htmlMediaElement.canPlayType(mediaFiles[i].type.replace(/mp3/,'mpeg')).replace(/no/, '') !== '') {
					result.method = 'native';
					result.url = mediaFiles[i].url;
					return result;
				}
			}
		}

		// if native playback didn't work, then test plugins
		if (options.mode === 'auto' || options.mode === 'shim') {
			for (i=0; i<mediaFiles.length; i++) {
				type = mediaFiles[i].type;

				// test all plugins in order of preference [silverlight, flash]
				for (j=0; j<options.plugins.length; j++) {

					pluginName = options.plugins[j];

					// test version of plugin (for future features)
					pluginVersions = mejs.plugins[pluginName];
					for (k=0; k<pluginVersions.length; k++) {
						pluginInfo = pluginVersions[k];

						// test if user has the correct plugin version
						if (mejs.PluginDetector.hasPluginVersion(pluginName, pluginInfo.version)) {

							// test for plugin playback types
							for (l=0; l<pluginInfo.types.length; l++) {
								// find plugin that can play the type
								if (type == pluginInfo.types[l]) {
									result.method = pluginName;
									result.url = mediaFiles[i].url;
									return result;
								}
							}
						}
					}
				}
			}
		}

		// what if there's nothing to play? just grab the first available
		if (result.method === '') {
			result.url = mediaFiles[0].url;
		}

		return result;
	},

	checkType: function(url, type, isVideo) {
		var ext;

		// if no type is supplied, fake it with the extension
		if (url && !type) {
			ext = url.substring(url.lastIndexOf('.') + 1);
			return ((isVideo) ? 'video' : 'audio') + '/' + ext;
		} else {
			// only return the mime part of the type in case the attribute contains the codec
			// see http://www.whatwg.org/specs/web-apps/current-work/multipage/video.html#the-source-element
			// `video/mp4; codecs="avc1.42E01E, mp4a.40.2"` becomes `video/mp4`

			if (type && ~type.indexOf(';')) {
				return type.substr(0, type.indexOf(';'));
			} else {
				return type;
			}
		}
	},

	createErrorMessage: function(htmlMediaElement, options, downloadUrl, poster) {
		var errorContainer = document.createElement('div');
		errorContainer.className = 'me-cannotplay';

		try {
			errorContainer.style.width = htmlMediaElement.width + 'px';
			errorContainer.style.height = htmlMediaElement.height + 'px';
		} catch (e) {}

		errorContainer.innerHTML = (poster !== '') ?
			'<a href="' + downloadUrl + '"><img src="' + poster + '" /></a>' :
			'<a href="' + downloadUrl + '"><span>Download File</span></a>';

		htmlMediaElement.parentNode.insertBefore(errorContainer, htmlMediaElement);
		htmlMediaElement.style.display = 'none';

		options.error(htmlMediaElement);
	},

	createPlugin:function(htmlMediaElement, options, isVideo, pluginType, mediaUrl, poster, autoplay, preload, controls) {
		var width = 1,
			height = 1,
			pluginid = 'me_' + pluginType + '_' + (mejs.meIndex++),
			pluginMediaElement = new mejs.PluginMediaElement(pluginid, pluginType, mediaUrl),
			container = document.createElement('div'),
			specialIEContainer,
			node,
			initVars;

		// check for placement inside a <p> tag (sometimes WYSIWYG editors do this)
		node = htmlMediaElement.parentNode;
		while (node !== null && node.tagName.toLowerCase() != 'body') {
			if (node.parentNode.tagName.toLowerCase() == 'p') {
				node.parentNode.parentNode.insertBefore(node, node.parentNode);
				break;
			}
			node = node.parentNode;
		}

		if (isVideo) {
			width = (options.videoWidth > 0) ? options.videoWidth : (htmlMediaElement.getAttribute('width') !== null) ? htmlMediaElement.getAttribute('width') : options.defaultVideoWidth;
			height = (options.videoHeight > 0) ? options.videoHeight : (htmlMediaElement.getAttribute('height') !== null) ? htmlMediaElement.getAttribute('height') : options.defaultVideoHeight;
		} else {
			if (options.enablePluginDebug) {
				width = 320;
				height = 240;
			}
		}

		// register plugin
		pluginMediaElement.success = options.success;
		mejs.MediaPluginBridge.registerPluginElement(pluginid, pluginMediaElement, htmlMediaElement);

		// add container (must be added to DOM before inserting HTML for IE)
		container.className = 'me-plugin';
		htmlMediaElement.parentNode.insertBefore(container, htmlMediaElement);

		// flash/silverlight vars
		initVars = [
			'id=' + pluginid,
			'isvideo=' + ((isVideo) ? "true" : "false"),
			'autoplay=' + ((autoplay) ? "true" : "false"),
			'preload=' + preload,
			'width=' + width,
			'startvolume=' + options.startVolume,
			'timerrate=' + options.timerRate,
			'height=' + height];

		if (mediaUrl !== null) {
			if (pluginType == 'flash') {
				initVars.push('file=' + mejs.Utility.encodeUrl(mediaUrl));
			} else {
				initVars.push('file=' + mediaUrl);
			}
		}
		if (options.enablePluginDebug) {
			initVars.push('debug=true');
		}
		if (options.enablePluginSmoothing) {
			initVars.push('smoothing=true');
		}
		if (controls) {
			initVars.push('controls=true'); // shows controls in the plugin if desired
		}

		switch (pluginType) {
			case 'silverlight':
				container.innerHTML =
'<object data="data:application/x-silverlight-2," type="application/x-silverlight-2" id="' + pluginid + '" name="' + pluginid + '" width="' + width + '" height="' + height + '">' +
'<param name="initParams" value="' + initVars.join(',') + '" />' +
'<param name="windowless" value="true" />' +
'<param name="background" value="black" />' +
'<param name="minRuntimeVersion" value="3.0.0.0" />' +
'<param name="autoUpgrade" value="true" />' +
'<param name="source" value="' + options.pluginPath + options.silverlightName + '" />' +
'</object>';
					break;

			case 'flash':

				if (mejs.MediaFeatures.isIE) {
					specialIEContainer = document.createElement('div');
					container.appendChild(specialIEContainer);
					specialIEContainer.outerHTML =
'<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab" ' +
'id="' + pluginid + '" width="' + width + '" height="' + height + '">' +
'<param name="movie" value="' + options.pluginPath + options.flashName + '?x=' + (new Date()) + '" />' +
'<param name="flashvars" value="' + initVars.join('&amp;') + '" />' +
'<param name="quality" value="high" />' +
'<param name="bgcolor" value="#000000" />' +
'<param name="wmode" value="transparent" />' +
'<param name="allowScriptAccess" value="always" />' +
'<param name="allowFullScreen" value="true" />' +
'</object>';

				} else {

					container.innerHTML =
'<embed id="' + pluginid + '" name="' + pluginid + '" ' +
'play="true" ' +
'loop="false" ' +
'quality="high" ' +
'bgcolor="#000000" ' +
'wmode="transparent" ' +
'allowScriptAccess="always" ' +
'allowFullScreen="true" ' +
'type="application/x-shockwave-flash" pluginspage="http://www.macromedia.com/go/getflashplayer" ' +
'src="' + options.pluginPath + options.flashName + '" ' +
'flashvars="' + initVars.join('&') + '" ' +
'width="' + width + '" ' +
'height="' + height + '"></embed>';
				}
				break;
		}
		// hide original element
		htmlMediaElement.style.display = 'none';

		// FYI: options.success will be fired by the MediaPluginBridge

		return pluginMediaElement;
	},

	updateNative: function(htmlMediaElement, options, autoplay, preload, playback) {
		// add methods to video object to bring it into parity with Flash Object
		for (var m in mejs.HtmlMediaElement) {
			htmlMediaElement[m] = mejs.HtmlMediaElement[m];
		}

		/*
		Chrome now supports preload="none"
		if (mejs.MediaFeatures.isChrome) {

			// special case to enforce preload attribute (Chrome doesn't respect this)
			if (preload === 'none' && !autoplay) {

				// forces the browser to stop loading (note: fails in IE9)
				htmlMediaElement.src = '';
				htmlMediaElement.load();
				htmlMediaElement.canceledPreload = true;

				htmlMediaElement.addEventListener('play',function() {
					if (htmlMediaElement.canceledPreload) {
						htmlMediaElement.src = playback.url;
						htmlMediaElement.load();
						htmlMediaElement.play();
						htmlMediaElement.canceledPreload = false;
					}
				}, false);
			// for some reason Chrome forgets how to autoplay sometimes.
			} else if (autoplay) {
				htmlMediaElement.load();
				htmlMediaElement.play();
			}
		}
		*/

		// fire success code
		options.success(htmlMediaElement, htmlMediaElement);

		return htmlMediaElement;
	}
};

window.mejs = mejs;
window.MediaElement = mejs.MediaElement;
author	Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk>
date	Mon, 25 Mar 2013 14:02:54 +0000
parents	032bc65ebafc
children