在线互动媒体技术 第五章 交互案例--音乐视频播放器精要.ppt

第五章 AS3.0 网站交互 package { import flash.display.MovieClip; import flash.display.Sprite; import flash.display.Loader; import flash.display.SimpleButton; import flash.display.Graphics; import flash.utils.ByteArray; import flash.text.TextField; import flash.geom.Rectangle; import flash.events.*; import .URLLoader; import .URLRequest; import flash.media.Sound; import flash.media.SoundChannel; import flash.media.SoundTransform; import flash.media.SoundMixer; （1）音乐播放器 5.9 Flash音乐播放器 音乐播放器的制作及音频处理 public class MusicPlayer extends Sprite { private var nVolume:Number; private var nPan:Number=0; private var mySound:Sound = new Sound(); private var myChannel:SoundChannel= new SoundChannel(); private var myTrans:SoundTransform = new SoundTransform(); private var pausePosition:int=0; private var playStatus:String; private var aTracks:Array = [mp3/1.mp3,mp3/2.mp3,mp3/3.mp3]; //private var aTitles:Array = [song 1,song 2,song 3]; private var playId:Number = 0; private var channelLength:int = 256; private var soundBytes:ByteArray = new ByteArray(); public function MusicPlayer() { init(); } 5.9 Flash音乐播放器 private function onSoundLoaded(event:Event):void { playStatus = play; myChannel = mySound.play(); mySound.removeEventListener(Event.COMPLETE, onSoundLoaded); myChannel.addEventListener(Event.SOUND_COMPLETE, onSoundCompleted); setVolume(); setPan(); } private function onLoadProgress(event:ProgressEvent):void { var loadedPct:Number = (event.bytesLoaded / event.bytesTotal); mProgress.mLoadingProgress.scaleX=loadedPct; mProgress.mJumpControl.scaleX=loadedPct; } 5.9 Flash音乐播放器 private function showProgress(event:Event):void { var playbackPercent:Number = (myChannel.position / mySound.length); mProgress.mPlayingProgress.scaleX=playbackPercent; SoundMputeSpectrum(soundBytes, false, 0); var graphic:Graphics = mWave.graphics; graphic.clear(); var n:Number = 0; for (var i:int = 0; i c