Actionscript functions

class Video {
	// All Matts Stuff below here...
	
	//initialise vars
	var nDownload:Number;
	var nPlayback:Number;
	var totalLength:Number;
	var currentVideo:Number = 0;
	var totalVideos:Number;
	var paused:Boolean = false;
	var movieEnded:Boolean;
	var aVideos:Array = new Array();
	var nBytesLoaded:Number;
	var nBytesTotal:Number;
	var percentageLoaded:Number;
	
    public function Video(filename:String)
	{
		//load xml file
		var videoXML:XML = new XML();
		videoXML.ignoreWhite = true;
		var rootNode:XMLNode;
		var currNode:XMLNode;
		videoXML.onLoad = function():Void
		{
			rootNode = this.firstChild;
			for (var i:Number = 0; i < rootNode.childNodes.length; i++) 
			{
				currNode = rootNode.childNodes[i];
				aVideos.push({source:currNode.attributes["tvad_filename"], title:currNode.attributes["tvad_title"],description:currNode.attributes["description"]});
			}
			totalVideos = aVideos.length;
			populateList();
		};
		videoXML.load(filename);
		
	
		//lets get the functions out of the way....
		var cList:Object = mcTab.mcPlaylist.cList;
		cList.vScrollPolicy = "auto";
		var listListener:Object = new Object();
		cList.addEventListener("change", listListener);
		listListener.change = function() 
		{
			var index:Number = cList.selectedIndex;
			currentVideo = index;
			populateFields(index);
			playVideo(aVideos[index].source);
		};
		
		//this bit checks what is happening with the playback
		ns.onStatus = function(oInfo:Object):Void 
		{
			trace(oInfo.code);
			//check if the movie has started
			if (oInfo.code == "NetStream.Play.Start")
			{
				trace("movie has started");
			}
			///check if the movie has finished
			if (oInfo.code == "NetStream.Play.Stop")
			{
				//if it has stopped, goto next one.
				currentVideo++;
				progressbar = true;
				playVideo(aVideos[currentVideo].source);
				populateFields(currentVideo);
				//check to see if we're on the last video
				//if we are
				if (currentVideo == totalVideos)
				{
					//original block of code
					//add what you wanna do after all the vids have been looped through
					_root.attachMovie("introTVCs_mc", "introTVCs_mc", 1, {_x: 0, _y: 0});
					//in this block dude :)
					trace("movie ended");
					
					clearInterval(nPlayback);
					movieEnded = true;
					mcBuffer._visible = false;
					
				}
				//videos();
			}
			//and if the source file can't be found?
			if (oInfo.code == "NetStream.Play.StreamNotFound")
			{
				trace("movie cannot be found");
			}
			if (oInfo.code == "NetStream.Buffer.Full")
			{
				mcBuffer._visible = false;
			}
			if (oInfo.code == "NetStream.Buffer.Empty" && !movieEnded)
			{
				trace("buffer empty");
				mcBuffer._visible = true;
				// buffer is empty now we need to check if remaining movie time is less buffer requirement
				var timeRemaining:Number = totalLength-ns.time;
				if (timeRemaining<ns.bufferTime)
				{
					ns.setBufferTime(timeRemaining);
				}
			}
		};
		ns["onMetaData"] = function (oInfo:Object):Void
		{
			totalLength = oInfo.duration;
		};
		
		//just to check how quickly it buffered
		trace(ns.bufferTime);
	}
	
	function populateList():Void 
	{
		for (var i:Number = 0; i<totalVideos; i++)
		{
			cList.addItem(aVideos[i].title);
		}
		cList.selectedIndex = currentVideo;
		populateFields(0);
		playVideo(aVideos[0].source);
	}
	
	
	//this is where you can access the xml data easily
	function populateFields(index:Number):Void
	{
		_root.tTitle.text = "TV COMMERCIALS " + aVideos[index].title;
	}
	
	function connect():Void 
	{
		//stuff to connect to video and set up buffer
		var nc:NetConnection = new NetConnection();
		nc.connect(null);
		var ns:NetStream = new NetStream(nc);
		ns.setBufferTime(5);
		mcVideo.oVideo.attachVideo(ns);
	}
	function playVideo(video:String):Void
	{
		movieEnded = false;
		mcBuffer._visible = true;
		clearIntervals();
		ns.play(video);
		nDownload = setInterval(downloadProgress, 1000/24);
		nPlayback = setInterval(playback, 1000/24);
	}
	
	//check how much has loaded and update status bar if needed
	function downloadProgress():Void
	{
		nBytesLoaded = ns.bytesLoaded;
		nBytesTotal = ns.bytesTotal;
		percentageLoaded = nBytesLoaded/nBytesTotal*100;
		mcProgressBar.mcDownloadBar._xscale = percentageLoaded;
		if (percentageLoaded == 100)
		{
			clearInterval(nDownload);
		}
	}
	
	//just in case
	function clearIntervals():Void
	{
		clearInterval(nDownload);
		clearInterval(nPlayback);
	}
}
                                              

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