Flash/Flex学习笔记(37)：不用系统组件(纯AS3)的视频播放器只有8.82K

以前为了赶项目，利用系统组件制作过一款视频播放器(见Flash/Flex学习笔记(6)：制作基于xml数据源的flv视频播放器)，但是系统组件实在是太大了，最终生成的swf居然有103K，随着AS3的深入学习，昨天又弄了一个只用AS3的播放器，最终只有8.82K，呵呵，这肥减得那是相当厉害。

用到了上一篇(Flash/Flex学习笔记(35)：自己动手实现一个滑块控件(JimmySilder))里自己写的的滑块控件，主要代码如下(关键是NetConnection与NetStream对象的使用):

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import Jimmy.Event.ValueChangeEvent;

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var _autoPlay:Boolean=true;//是否自动播放

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var _netConn:NetConnection;

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var _netStream:NetStream;

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var _duration:Number=0.0;

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var _client:Object;

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var _soundTransform:SoundTransform;

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var _volumn=0.6;//初始音量

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var _flvUrl = "flv的地址";

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function init():void {

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txtInfo.text = "";

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txtInfo.visible = false;

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txtCurrent.text = "00:00";

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txtTotal.text = "00:00";

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silderVideo.Value = 0.0;

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videoMask.visible = false;

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txtPercent.text = "";

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txtPercent.visible = false;

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_netConn = new NetConnection();//创建连接

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_client = new Object();

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_soundTransform = new SoundTransform();

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//初始化[暂停]/[播放]按钮可见性

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if (_autoPlay) {

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btnPause.visible=true;

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btnPlay.visible=false;

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} else {

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btnPause.visible=false;

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btnPlay.visible=true;

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}   

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//初始化滑块按钮宽度

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silderSound.ButtonWidth=35;

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silderVideo.ButtonWidth=9.5;    

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silderSound.Value = _volumn;

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silderSound.ShowBarTri = true;

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silderSound.ShowBar = false;

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//开始连接并播放

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_netConn.connect(null);

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_netStream=new NetStream(_netConn);

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_netStream.bufferTime = 5;

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wVideo.attachNetStream(_netStream);

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_netStream.play(_flvUrl);   

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_soundTransform.volume=_volumn;

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_netStream.soundTransform=_soundTransform;

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_client.onMetaData = MetaDataHandler;

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_netStream.client=_client;

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//注册监听事件

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_netStream.addEventListener(NetStatusEvent.NET_STATUS,NetStatusHandler);

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btnSound.addEventListener(MouseEvent.MOUSE_OVER,function(){ Mouse.cursor = MouseCursor.BUTTON});

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btnSound.addEventListener(MouseEvent.MOUSE_OUT,function(){ Mouse.cursor = MouseCursor.AUTO});

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btnSound.addEventListener(MouseEvent.MOUSE_DOWN,btnSoundMouseDown);

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btnPlay.addEventListener(MouseEvent.CLICK,btnPlayMouseClick);

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btnPause.addEventListener(MouseEvent.CLICK,btnPauseMouseClick);

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btnStop.addEventListener(MouseEvent.CLICK,btnStopMouseClick);

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silderSound.addEventListener(ValueChangeEvent.VALUE_CHANGE,VolumnChangedHandler);

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addEventListener(Event.ENTER_FRAME,EnterFrameHandler);  

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silderVideo.addEventListener(MouseEvent.MOUSE_DOWN,silderVideoMouseDown);

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silderVideo.addEventListener(ValueChangeEvent.VALUE_CHANGE,VideoValueChangedHandler);

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}

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function NetStatusHandler(e:NetStatusEvent):void{

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txtInfo.text = "";

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videoMask.visible = txtPercent.visible = txtInfo.visible = false;

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trace(e.info.code);

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switch(e.info.code){

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case "NetStream.Play.StreamNotFound":

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txtInfo.text = "错误：视频文件地址无法访问"

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break;

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case "NetStream.Play.Failed":

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txtInfo.text = "错误：视频播放失败"

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break;

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case "NetStream.Buffer.Empty":

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txtInfo.text = "影片缓冲中...";

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break;

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case "NetStream.Play.Stop":

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//txtInfo.text = "播放已停止";

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break;

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case "NetStream.Seek.InvalidTime":

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//txtInfo.text = "错误：无法跳到指定的时间点播放";

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//trace(e.info.Error);

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//_netStream.pause();

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//btnPlay.visible = true;

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//btnPause.visible = false;         

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break;  

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default:

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break;

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}

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if (txtInfo.text.length>0){      

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videoMask.visible = txtPercent.visible = txtInfo.visible = true;        

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}

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}

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function btnSoundMouseDown(e:MouseEvent) {

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var i:uint=btnSound.currentFrame;

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if (i==1) {

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btnSound.gotoAndStop(2);//切换到静音

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SetVolumn(0);

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} else {

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btnSound.gotoAndStop(1);//切换到有声音

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SetVolumn(silderSound.Value);

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}

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}

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//设置音量

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function SetVolumn(vol:Number):void {

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var _snd:SoundTransform = _netStream.soundTransform;

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_snd.volume = vol;

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_netStream.soundTransform = _snd;

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}

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//Play按钮点击事件

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function btnPlayMouseClick(e:MouseEvent) {

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//切换按钮可用性

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btnPause.visible=true;

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btnPlay.visible=false;

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//开始播放...

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_netStream.resume();

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}

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//Pause按钮点击事件

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function btnPauseMouseClick(e:MouseEvent) {

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//切换按钮可用性

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btnPause.visible=false;

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btnPlay.visible=true;

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//暂停...

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_netStream.pause();

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}

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//Stop按钮点击事件

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function btnStopMouseClick(e:MouseEvent) {

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_netStream.pause();

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_netStream.seek(0);

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//切换播放/暂停按钮状态

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btnPause.visible=false;

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btnPlay.visible=true;

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}

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//获取视频总持续时间

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function MetaDataHandler(data:Object) {

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_duration = data.duration;  

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}

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function VolumnChangedHandler(e:ValueChangeEvent):void{

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//如果没被禁音，则允许调节音量

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if (btnSound.currentFrame==1){

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SetVolumn(e.NewValue);

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}

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}

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function VideoValueChangedHandler(e:ValueChangeEvent):void{

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_netStream.pause();

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_netStream.seek(e.NewValue * _duration);

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//_netStream.resume();

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}

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//进入每帧的处理函数

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function EnterFrameHandler(e:Event):void{

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if (_duration>0){

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txtCurrent.text = Math.floor(_netStream.time/60) + ":" + Math.round(_netStream.time%60);

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txtTotal.text = Math.floor(_duration/60) + ":" + Math.round(_duration%60);  

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silderVideo.Value = _netStream.time/_duration;

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}

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if (_netStream.bytesLoaded>0){

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silderVideo.LoadingValue =  _netStream.bytesLoaded / _netStream.bytesTotal;

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}   

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//trace(_netStream.bytesLoaded + "/" + _netStream.bytesTotal);

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}

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function RemoveEnterFrameHandler(){

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if (silderVideo.IsDragging){

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removeEventListener(Event.ENTER_FRAME,EnterFrameHandler);

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}

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else{

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addEventListener(Event.ENTER_FRAME,EnterFrameHandler);

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}

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}

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function silderVideoMouseDown(e:MouseEvent):void{

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//trace("进度滑块被点击了!");

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removeEventListener(Event.ENTER_FRAME,EnterFrameHandler);

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stage.addEventListener(MouseEvent.MOUSE_UP,stageMouseUpHandler);

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}

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function stageMouseUpHandler(e:MouseEvent):void{

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addEventListener(Event.ENTER_FRAME,EnterFrameHandler);

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//trace("鼠标MouseUp事件");

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if (btnPause.visible){

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_netStream.resume();

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}

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stage.removeEventListener(MouseEvent.MOUSE_UP,stageMouseUpHandler); 

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}

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init();