1 /** The minplayer namespace. */
  2 var minplayer = minplayer || {};
  3 
  4 // Private function to check a single element's play type.
  5 function checkPlayType(elem, playType) {
  6   if ((typeof elem.canPlayType) === 'function') {
  7     if (typeof playType === 'object') {
  8       var i = playType.length;
  9       var mimetype = '';
 10       while (i--) {
 11         mimetype = checkPlayType(elem, playType[i]);
 12         if (!!mimetype) {
 13           break;
 14         }
 15       }
 16       return mimetype;
 17     }
 18     else {
 19       var canPlay = elem.canPlayType(playType);
 20       if (('no' !== canPlay) && ('' !== canPlay)) {
 21         return playType;
 22       }
 23     }
 24   }
 25   return '';
 26 }
 27 
 28 /**
 29  * @constructor
 30  * @class This class is used to define the types of media that can be played
 31  * within the browser.
 32  * <p>
 33  * <strong>Usage:</strong>
 34  * <pre><code>
 35  *   var playTypes = new minplayer.compatibility();
 36  *
 37  *   if (playTypes.videoOGG) {
 38  *     console.log("This browser can play OGG video");
 39  *   }
 40  *
 41  *   if (playTypes.videoH264) {
 42  *     console.log("This browser can play H264 video");
 43  *   }
 44  *
 45  *   if (playTypes.videoWEBM) {
 46  *     console.log("This browser can play WebM video");
 47  *   }
 48  *
 49  *   if (playTypes.audioOGG) {
 50  *     console.log("This browser can play OGG audio");
 51  *   }
 52  *
 53  *   if (playTypes.audioMP3) {
 54  *     console.log("This browser can play MP3 audio");
 55  *   }
 56  *
 57  *   if (playTypes.audioMP4) {
 58  *     console.log("This browser can play MP4 audio");
 59  *   }
 60  * </code></pre>
 61  */
 62 minplayer.compatibility = function() {
 63   var elem = null;
 64 
 65   // Create a video element.
 66   elem = document.createElement('video');
 67 
 68   /** Can play OGG video */
 69   this.videoOGG = checkPlayType(elem, 'video/ogg');
 70 
 71   /** Can play H264 video */
 72   this.videoH264 = checkPlayType(elem, [
 73     'video/mp4',
 74     'video/h264'
 75   ]);
 76 
 77   /** Can play WEBM video */
 78   this.videoWEBM = checkPlayType(elem, [
 79     'video/x-webm',
 80     'video/webm',
 81     'application/octet-stream'
 82   ]);
 83 
 84   // Create an audio element.
 85   elem = document.createElement('audio');
 86 
 87   /** Can play audio OGG */
 88   this.audioOGG = checkPlayType(elem, 'audio/ogg');
 89 
 90   /** Can play audio MP3 */
 91   this.audioMP3 = checkPlayType(elem, 'audio/mpeg');
 92 
 93   /** Can play audio MP4 */
 94   this.audioMP4 = checkPlayType(elem, 'audio/mp4');
 95 };
 96 
 97 if (!minplayer.playTypes) {
 98 
 99   /** The compatible playtypes for this browser. */
100   minplayer.playTypes = new minplayer.compatibility();
101 }
102