flash on 2012-5-25

/**
 * Copyright bpyser ( http://wonderfl.net/user/bpyser )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/jeiu
 */

package {
    import flash.display.AVM1Movie;
    import flash.display.Sprite;
    import flash.display.Graphics;
    import flash.events.Event;
    import flash.media.Sound;
    import flash.media.SoundChannel;
    import flash.media.SoundMixer;
    import flash.net.URLRequest;
    import flash.utils.ByteArray;
    import flash.text.TextField;
    import flash.external.ExternalInterface;
    import flash.system.Security;
    import flash.media.Sound;
    import flash.media.SoundChannel;
    import flash.media.SoundLoaderContext;
    import fl.controls.Button;
    import flash.events.MouseEvent;

    public class SoundMixer_compute extends Sprite {
        
         private var text:TextField = new TextField();
         private var snd:Sound;
         private var aButton:Button = new Button();
         private var playing:Boolean = false;
         private var started:Boolean = false;
         private var sndCh:SoundChannel;
         private var pos:Number = 0;
         
         public function SoundMixer_compute(){
            Security.loadPolicyFile("http://hycro.crz.jp/crossdomain.xml");
            
            addChild(aButton); 
            aButton.label = "Play"; 
            aButton.toggle =true;  
            aButton.move(50, 50);
            
            aButton.addEventListener(MouseEvent.CLICK, buttonClickHandler); 
            
            addEventListener(Event.ENTER_FRAME, onEnterFrame);
            
            ExternalInterface.addCallback("getSoundMixerData", getSoundMixerData);
            
        }
    
    
       private function buttonClickHandler(event:MouseEvent):void { 
           if(!started){
            playSound('http://www.takasumi-nagai.com/soundfiles/01.mp3');
            playing = true;
            started = true;
            aButton.label = "Pause";
           }else if(playing){
               pos = sndCh.position;
               sndCh.stop();
               playing = false;
               aButton.label = "Play";
           }else{
               aButton.label = "Pause";
               sndCh = snd.play(pos);
               playing = true;
           }
        }
    

     public function pauseSound():void {
         
     }

        
        private function playSound(url:String):void
        {
            snd = new Sound();
            var context:SoundLoaderContext = new SoundLoaderContext(0, true);
            var sndReq:URLRequest = new URLRequest(url);
            snd.load(sndReq,context);
            sndCh = new SoundChannel();
            sndCh = snd.play(0, 5);     
        }

        public function getSoundMixerData (callback:String ):void {
            try{
            var bytes:ByteArray = new ByteArray();
            const CHANNEL_LENGTH:int = 256;

            SoundMixer.computeSpectrum(bytes, true, 0);
            
            var data:String = "" + bytes.readFloat();
            
            for(var i:int = 1; i < CHANNEL_LENGTH*2;i++){
                data += "," + bytes.readFloat();
            }
            
            
            


            ExternalInterface.call(callback,data);
            }catch(ex:Error ){
                //ExternalInterface.call(callback,ex.message);
            }
            //ExternalInterface.addCallback("getSoundMixerData", getSoundMixerData);
        }
        private function onEnterFrame(event:Event):void {
            var bytes:ByteArray = new ByteArray();
            const PLOT_HEIGHT:int = 200;
            const CHANNEL_LENGTH:int = 256;

            SoundMixer.computeSpectrum(bytes, false, 0);
            
            var g:Graphics = this.graphics;
            
            g.clear();
       
            g.lineStyle(0, 0x6600CC);
            g.beginFill(0x6600CC);
            g.moveTo(0, PLOT_HEIGHT);
            
            var n:Number = 0;
            
            for (var i:int = 0; i < CHANNEL_LENGTH; i++) {
                n = (bytes.readFloat() * PLOT_HEIGHT);
                g.lineTo(i * 2, PLOT_HEIGHT - n);
            }

            g.lineTo(CHANNEL_LENGTH * 2, PLOT_HEIGHT);
            g.endFill();
 
            g.lineStyle(0, 0xCC0066);
            g.beginFill(0xCC0066, 0.5);
            g.moveTo(CHANNEL_LENGTH * 2, PLOT_HEIGHT);
            
            for (i = CHANNEL_LENGTH; i > 0; i--) {
                n = (bytes.readFloat() * PLOT_HEIGHT);
                g.lineTo(i * 2, PLOT_HEIGHT - n);
            }
  
            g.lineTo(0, PLOT_HEIGHT);
            g.endFill();
        }
    }
}