SoundVisualizerTest

音は http://shw.in/sozai/ を使わせていただきました。 
*
* 2010.5.2 エラー回避のため、90行目に下記のコードを追加しました。
*
* if(n == 0)    return;
*
* matacat 様、エラーのご報告有難うございます！！（コメントで失礼します）

by ikke 02 May 2010

Tags

Particle SoundMixer.computeSpectrum beautifl sound
Embed

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

/**
* 音は http://shw.in/sozai/ を使わせていただきました。 
*
* 2010.5.2 エラー回避のため、90行目に下記のコードを追加しました。
*
* if(n == 0)    return;
*
* matacat 様、エラーのご報告有難うございます！！（コメントで失礼します）
*/
package {
	import flash.display.Bitmap;
	import flash.display.BitmapData;
	import flash.display.BlendMode;
	import flash.display.Sprite;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.events.Event;
	import flash.geom.ColorTransform;
	import flash.media.Sound;
	import flash.media.SoundChannel;
	import flash.media.SoundMixer;
	import flash.media.SoundTransform;
	import flash.net.URLRequest;
	import flash.system.Security;
	import flash.utils.ByteArray;

	public class FlashTest extends Sprite
	{
		private const SIZE:int = 300;
		private var canvas:BitmapData;
		
		private var sound:Sound;
		private var soundMixier:SoundMixer;
		private var soundChannel:SoundChannel;
		
		private var ctfm:ColorTransform;
		private var bytes:ByteArray = new ByteArray();
		private var particles:Array = [];
		private var sw:Number;
		private var sh:Number;
		
		public function FlashTest()
		{
                        Wonderfl.capture_delay( 3 )
			stage.scaleMode = StageScaleMode.NO_SCALE;
			stage.align = StageAlign.TOP_LEFT;
			stage.frameRate =  30;
			sw = stage.stageWidth;
			sh = stage.stageHeight;
			
			var baseBmd:BitmapData = new BitmapData(sw, sh, false, 0 );
			addChild( new Bitmap( baseBmd ) );
			
			canvas = new BitmapData( sw, sh, false, 0 );
			var bmp:Bitmap = new Bitmap( canvas );
			bmp.blendMode = BlendMode.ADD;
			addChild( bmp );
			
			ctfm = new ColorTransform();
			ctfm.alphaMultiplier = .1;
			
			sound = new Sound();
			sound.addEventListener( Event.COMPLETE, comp );
			Security.loadPolicyFile( "http://psalms.weblike.jp/crossdomain.xml" );
			sound.load( new URLRequest("http://psalms.weblike.jp/sound/u-chi-u.mp3" ) );
		}
		
		private function comp(e:Event):void
		{
			soundChannel = sound.play();
			var stfm:SoundTransform = new SoundTransform();
			soundChannel.soundTransform = stfm;
			
			addEventListener( Event.ENTER_FRAME, enterFrame );
		}

		private function enterFrame(e:Event):void
		{
			SoundMixer.computeSpectrum(bytes, false, 0 );
			canvas.colorTransform( canvas.rect, ctfm);
			canvas.lock();
			var n:Number = 0;
			var size:Number = 0;
			
        
			for (var i:int = 0; i < 512; i++)
			{
				n = ( bytes.readFloat() + 1) / 2;
				size = n * SIZE;
				if(n == 0)    return;
				var l:Number = (size/2)*Math.PI;
				var interval:Number = l / 360 * (3.14*5); // (3.14*5) 調整用。
				
				for( var j:Number = 0; j <= l; j+= interval )
				{
					var x:Number = size/2 * Math.sin( j );
					var y:Number = size/2 * Math.cos( j );
					if( x == 0 ) continue;
					
					var r:uint = 0xcc;
					var g:uint = 0xff * n;
					var b:uint = 0xff * n;
					var color:uint = r << 16 | g << 8 | b;
					if( n <= .8 )	canvas.setPixel( x + sw/2, y + sh/2, color );
					
					if( n >= .8 && particles.length <= size/5)
					{
						var p:Particle = new Particle(x + sw/2, y + sh/2, n, 0xff0066, canvas );
						particles.push( p );
					}
				}
				
				
				for( var k:int = 0; k < particles.length; k++ )
				{
					p = particles[ k ];
					if( p != null )
					{
						p.update();
						if( p.isEnd )	particles.splice( k, 1 );
					}
				}
			}
			
			canvas.unlock();
		}
		
	}
}

import flash.display.BitmapData;
import flash.events.EventDispatcher;
import flash.events.Event;

class Particle
{
	private var vx:Number = 0;
	private var vy:Number = 0;
	private var x:Number = 0;
	private var y:Number = 0;
	private var col:uint;
	private var bmd:BitmapData;
	private var limit:int = 0;
	public var isEnd:Boolean = false;
	private var max:int = 0;
	
	public function Particle(x:Number,y:Number, sp:Number, col:uint, bmd:BitmapData):void
	{
		this.x = x;
		this.y = y;
		this.col = col;
		max  = 1000 * sp;
		vx = ( Math.random() -.5 )/15 * sp;
		vy = ( Math.random() -.5 )/15 * sp;
		this.bmd = bmd;
	}
	
	public function update( ):void
	{
		x += vx;
		y += vy;
		bmd.setPixel( x, y, col );
		limit+=1;
		if( limit >= max )	isEnd = true;
	}
}