as3.0声音波形频谱系列_03

as3.0声音波形频谱系列_03

package 
{
	import flash.display.Sprite;
	import flash.display.BitmapData;
	import flash.display.Bitmap;
	import flash.geom.Point;
	import flash.utils.ByteArray;
	import flash.filters.BlurFilter;
	import flash.geom.ColorTransform;
	import flash.display.PixelSnapping;
	import flash.events.Event;
	import flash.media.SoundMixer;
	import flash.geom.Rectangle;

	public class Spectrum extends Sprite
	{
		var thisW:Number;
		var thisH:Number;
		var parBd:BitmapData;
		var bitmapData:BitmapData;
		var parBit:Bitmap;
		var bitmap:Bitmap;
		var point:Point;
		var bytes:ByteArray;
		var blur:BlurFilter;
		var colorTransform:ColorTransform;
		var list:Vector.<Point>= new Vector.<Point>();

		public function Spectrum(w:Number=550,h:Number=400)
		{
			thisW = w;
			thisH = h;
			init();
		}
		function init():void
		{
			parBd = new BitmapData(thisW,thisH,true,0);
			bitmapData = new BitmapData(thisW,thisH,true,0);
			parBit = addChild(new Bitmap(parBd,PixelSnapping.AUTO,false)) as Bitmap;
			bitmap = addChild(new Bitmap(bitmapData,PixelSnapping.AUTO,false)) as Bitmap;
			parBit.scaleX = parBit.scaleY = -1;
			colorTransform = new ColorTransform(1,11,24,0.95,0,0,0,0);
			blur = new BlurFilter(6,5,8);
			parBit.filters = [blur];

			for (var i:int=0; i<768; i++)
			{
				point= new Point();
				point.x = thisW * 0.5 + Math.cos(i) * 50;
				point.y = thisH * 0.5 + Math.sin(i) * 50;
				list.push(point);
			}
			bytes=new ByteArray();
			addEventListener(Event.ENTER_FRAME, enterFrameHandler);

		}

		private function enterFrameHandler(event:Event):void
		{
			var newPoint:Point=new Point();
			SoundMixer.computeSpectrum(bytes,false,0);
			parBd.colorTransform(new Rectangle(0, 0,thisW,thisH),colorTransform);
			bitmapData.colorTransform(new Rectangle(0, 0,thisW,thisH),colorTransform);
			for (var i:int=0; i<list.length; i++)
			{
				newPoint=list[i]
				if (i< 256)
				{
					newPoint.x = thisW * 0.5 + Math.cos(i* 1.40625 * Math.PI / 180) * (thisW * 0.3 + bytes.readFloat() * 55);
					newPoint.y = thisH * 0.5 + Math.sin(i* 1.40625 * Math.PI / 180) * (thisH * 0.3 + bytes.readFloat() * 55);
				}
				else if (i!= 256)
				{
					if (i> 256)
					{
						newPoint.x = (list[i- 256].x + list[i- 255].x) * 0.5;
						newPoint.y = (list[i- 256].y + list[i- 255].y) * 0.5;
					}
				}
				else
				{
					newPoint.x = (list[256].x + list[0].x) * 0.5;
					newPoint.y = (list[256].y + list[0].y) * 0.5;
				}
				parBd.setPixel32(newPoint.x, newPoint.y, 5278190080);
				bitmapData.setPixel32(newPoint.x, newPoint.y,2278190080);
			}


		}









	}

}