Flash/Flex学习笔记(32)：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):

import Jimmy.Event.ValueChangeEvent;

 
var _autoPlay:Boolean=true;//是否自动播放

var _netConn:NetConnection;

 
var _netStream:NetStream;

 
var _duration:Number=0.0;

 
var _client:Object;

 
var _soundTransform:SoundTransform;

 
var _volumn=0.6;//初始音量

 
var _flvUrl = "flv的地址";

function init():void {

txtInfo.text = "";

 
txtInfo.visible = false;

 
txtCurrent.text = "00:00";

 
txtTotal.text = "00:00";

 
silderVideo.Value = 0.0;

 
videoMask.visible = false;

 
txtPercent.text = "";

 
txtPercent.visible = false;

_netConn = new NetConnection();//创建连接

 
_client = new Object();

 
_soundTransform = new SoundTransform();

 
//初始化[暂停]/[播放]按钮可见性

 
if (_autoPlay) {

btnPause.visible=true;

 
btnPlay.visible=false;

 
} else {

 
btnPause.visible=false;

 
btnPlay.visible=true;

 
}   

 
//初始化滑块按钮宽度

 
silderSound.ButtonWidth=35;

silderVideo.ButtonWidth=9.5;    

 
silderSound.Value = _volumn;

 
silderSound.ShowBarTri = true;

 
silderSound.ShowBar = false;

 
//开始连接并播放

 
_netConn.connect(null);

 
_netStream=new NetStream(_netConn);

 
_netStream.bufferTime = 5;

 
wVideo.attachNetStream(_netStream);

 
_netStream.play(_flvUrl);   

_soundTransform.volume=_volumn;

 
_netStream.soundTransform=_soundTransform;

_client.onMetaData = MetaDataHandler;

 
_netStream.client=_client;

//注册监听事件

 
_netStream.addEventListener(NetStatusEvent.NET_STATUS,NetStatusHandler);

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

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

btnSound.addEventListener(MouseEvent.MOUSE_DOWN,btnSoundMouseDown);

 
btnPlay.addEventListener(MouseEvent.CLICK,btnPlayMouseClick);

 
btnPause.addEventListener(MouseEvent.CLICK,btnPauseMouseClick);

 
btnStop.addEventListener(MouseEvent.CLICK,btnStopMouseClick);

silderSound.addEventListener(ValueChangeEvent.VALUE_CHANGE,VolumnChangedHandler);

 
addEventListener(Event.ENTER_FRAME,EnterFrameHandler);  

 
silderVideo.addEventListener(MouseEvent.MOUSE_DOWN,silderVideoMouseDown);

 
silderVideo.addEventListener(ValueChangeEvent.VALUE_CHANGE,VideoValueChangedHandler);

 
}

function NetStatusHandler(e:NetStatusEvent):void{

txtInfo.text = "";

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

trace(e.info.code);

 
switch(e.info.code){

 
case "NetStream.Play.StreamNotFound":

 
txtInfo.text = "错误：视频文件地址无法访问"

break;

 
case "NetStream.Play.Failed":

 
txtInfo.text = "错误：视频播放失败"

 
break;

 
case "NetStream.Buffer.Empty":

 
txtInfo.text = "影片缓冲中...";

 
break;

 
case "NetStream.Play.Stop":

 
//txtInfo.text = "播放已停止";

 
break;

 
case "NetStream.Seek.InvalidTime":

 
//txtInfo.text = "错误：无法跳到指定的时间点播放";

//trace(e.info.Error);

//_netStream.pause();

//btnPlay.visible = true;  
//btnPause.visible = false;         

 
break;  

 
default:

 
break;

}

if (txtInfo.text.length>0){      

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

 
}

}

 
function btnSoundMouseDown(e:MouseEvent) {

 
var i:uint=btnSound.currentFrame;

 
if (i==1) {

btnSound.gotoAndStop(2);//切换到静音

SetVolumn(0);

} else {

btnSound.gotoAndStop(1);//切换到有声音

SetVolumn(silderSound.Value);

 
}

 
}

 
//设置音量

function SetVolumn(vol:Number):void {

 
var _snd:SoundTransform = _netStream.soundTransform;

 
_snd.volume = vol;

 
_netStream.soundTransform = _snd;

 
}

 
//Play按钮点击事件

 
function btnPlayMouseClick(e:MouseEvent) {

 
//切换按钮可用性

 
btnPause.visible=true;

 
btnPlay.visible=false;

 
//开始播放...

 
_netStream.resume();

 
}

 
//Pause按钮点击事件

 
function btnPauseMouseClick(e:MouseEvent) {

 
//切换按钮可用性

 
btnPause.visible=false;

 
btnPlay.visible=true;

 
//暂停...

 
_netStream.pause();

 
}

 
//Stop按钮点击事件

 
function btnStopMouseClick(e:MouseEvent) {

 
_netStream.pause();

 
_netStream.seek(0);

 
//切换播放/暂停按钮状态

 
btnPause.visible=false;

btnPlay.visible=true;

 
}

 
//获取视频总持续时间

 
function MetaDataHandler(data:Object) {

 
_duration = data.duration;  

 
}

 
function VolumnChangedHandler(e:ValueChangeEvent):void{

 
//如果没被禁音，则允许调节音量

 
if (btnSound.currentFrame==1){

SetVolumn(e.NewValue);

}

 
}

function VideoValueChangedHandler(e:ValueChangeEvent):void{

 
_netStream.pause();

_netStream.seek(e.NewValue * _duration);

 
//_netStream.resume();

 
}

 
//进入每帧的处理函数

 
function EnterFrameHandler(e:Event):void{

 
if (_duration>0){

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

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

 
silderVideo.Value = _netStream.time/_duration;

 
}

 
if (_netStream.bytesLoaded>0){

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

 
}   

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

 
}

 

function RemoveEnterFrameHandler(){

 
if (silderVideo.IsDragging){

removeEventListener(Event.ENTER_FRAME,EnterFrameHandler);

 
} else{  
addEventListener(Event.ENTER_FRAME,EnterFrameHandler);

 
}

}

 

function silderVideoMouseDown(e:MouseEvent):void{

//trace("进度滑块被点击了!");

removeEventListener(Event.ENTER_FRAME,EnterFrameHandler);

 
stage.addEventListener(MouseEvent.MOUSE_UP,stageMouseUpHandler);

 
}

 
function stageMouseUpHandler(e:MouseEvent):void{

 
addEventListener(Event.ENTER_FRAME,EnterFrameHandler);

 
//trace("鼠标MouseUp事件");

 
if (btnPause.visible){

 
_netStream.resume();

}

stage.removeEventListener(MouseEvent.MOUSE_UP,stageMouseUpHandler); 

 
}

init();