webshims.register('mediaelement-native-fix', function($, webshims, window, document, undefined){
  
  	var support = webshims.support;
  	var fixBuffered = (function(){
  		if(support.videoBuffered){return $.noop;}
  
  		var getBufferedData = function(elem){
  			var data = webshims.data(elem, 'mediaelementBuffered');
  			if(!data){
  				data = {
  					buffered: {
  						start: function(index){
  							if(index >= data.buffered.length){
  								webshims.error('buffered index size error');
  								return;
  							}
  							return 0;
  						},
  						end: function(index){
  							if(index >= data.buffered.length){
  								webshims.error('buffered index size error');
  								return;
  							}
  							return data.loaded;
  						},
  						length: 0
  					},
  					loaded: 0
  				};
  				webshims.data(elem, 'mediaelementBuffered', data);
  			}
  			return data;
  		};
  
  		var loadProgessListener = function(e){
  			e = e.originalEvent;
  			if(!e || !('lengthComputable' in e)){return;}
  			var data = webshims.data(e.target, 'mediaelement');
  			if(data && data.isActive != 'html5'){return;}
  			if(e.lengthComputable && 'loaded' in e){
  				var duration = e.target.duration;
  				var bufferedData = getBufferedData(e.target);
  				bufferedData.loaded = (duration) ? e.loaded / e.total * duration : 0;
  				if(bufferedData.loaded){
  					bufferedData.buffered.length = 1;
  				}
  				if(e.type == 'load'){
  					$(e.target).triggerHandler('progress');
  				}
  			}
  		};
  		var removeProgress = function(e){
  			var data = getBufferedData(e.target);
  			data.buffered.length = 0;
  			data.loaded = 0;
  		};
  
  		['audio', 'video'].forEach(function(nodeName){
  			var sup = webshims.defineNodeNameProperty(nodeName, 'buffered',  {
  				prop: {
  					get: function(){
  						var data = webshims.data(this, 'mediaelement');
  
  						if(data && data.isActive == 'flash' && sup.prop._supget){
  							sup.prop._supget.apply(this);
  						} else {
  							return getBufferedData(this).buffered;
  						}
  					}
  				}
  			});
  		});
  
  		return function(){
  			$(this)
  				.off('load progress', loadProgessListener)
  				.off('emptied', removeProgress)
  				.on('load progress', loadProgessListener)
  				.on('emptied', removeProgress)
  			;
  		};
  	})();
  
  	(function(){
  		var videoElem = document.createElement('video');
  		if( !('preload' in videoElem) && ('autobuffer' in videoElem)){
  			var noBufferProps = {
  				metadata: 1,
  				none: 1
  			};
  			webshims.onNodeNamesPropertyModify(['audio', 'video'], ['preload'], {
  				set: function(value, boolValue, curType){
  					if(noBufferProps[value] || curType == 'removeAttr'){
  						this.autobuffer = false;
  					} else if( !(webshims.data(this, 'mediaelement') || {}).isActive == 'html5') {
  						this.autobuffer = true;
  					}
  				},
  				initAttr: true
  			});
  		}
  	})();
  
  	var fixProgressEvent = (function(){
  		if(support.mediaDefaultMuted){return $.noop;}
  
  
  		return function(){
  			if($.data(this, 'fixedMediaProgress')){return;}
  			var bufferTimer;
  			var lastBuffered;
  			var elem = this;
  			var getBufferedString = function(){
  				var buffered = $.prop(elem, 'buffered');
  				if(!buffered){return;}
  				var bufferString = "";
  				for(var i = 0, len = buffered.length; i < len;i++){
  					bufferString += buffered.end(i);
  				}
  				return bufferString;
  			};
  			var testBuffer = function(){
  				var buffered = getBufferedString();
  				if(buffered != lastBuffered){
  					lastBuffered = buffered;
  					webshims.error('needed to trigger progress manually');
  					$(elem).triggerHandler('progress');
  				}
  			};
  
  			$(this)
  				.data('fixedMediaProgress', true)
  				.on({
  					'play loadstart progress': function(e){
  						if(e.type == 'progress'){
  							lastBuffered = getBufferedString(this);
  						}
  						clearTimeout(bufferTimer);
  						bufferTimer = setTimeout(testBuffer, 800);
  					},
  					'emptied stalled mediaerror abort suspend': function(e){
  						if(e.type == 'emptied'){
  							lastBuffered = false;
  						}
  						clearTimeout(bufferTimer);
  					}
  				})
  			;
  			if('ActiveXObject' in window && $.prop(this, 'paused') && !$.prop(this, 'readyState') && $(this).is('audio[preload="none"][controls]:not([autoplay],.nonnative-api-active)')){
  				$(this).prop('preload', 'metadata').mediaLoad();
  			}
  		};
  	})();
  	
  	webshims.addReady(function(context, insertedElement){
  		$('video, audio', context)
  			.add(insertedElement.filter('video, audio'))
  			.each(fixBuffered)
  			.each(fixProgressEvent)
  		;
  		
  	 });
  
  });