html5资源加载 #39

ResourceLoader.handleAudio = function(rsobj, callback){
  var itemObj = this;
  var audio = new Audio();
  itemobj.media = audio;
  rsobj.rs[itemobj.key] = audio;

  var filePath = itemobj.src;
  var folderPath = filePath.substr(0, filePath.lastIndexOf('.'));

  var source = document.createElement('source');
  if(audio.canPlayType('audio/mpeg')){
    source.type = 'audio/mpeg';
    source.src = folderPath + '.mp3';
  }else if(audio.canPlayType('audio/ogg')){
    source.type = 'audio/ogg';
    source.src = folderPath + '.ogg';
  }else if((audio.canPlayType('audio/wav'))){
    source.type = 'audio/wav';
    source.src = folderPath + '.wav';
  }
  audio.appendChild(source);

  ResourceLoader.mediaCheck(rsobj, itemobj, callback);
}