package
{
	import flash.display.Sprite;
	import flash.media.Sound;
	import flash.display.BitmapData;
	import flash.util.ByteArray;
	import flash.media.SoundMixer;
	import flash.events.Event;
	import flash.net.URLRequest;
	import flash.system.ApplicationDomain;

	public class SpectrumTest extends Sprite
	{
		private var bytes:ByteArray;
		private var CHANNEL_LENGTH:uint = 256;

		public function SpectrumTest()
		{
			var s:Sound = new Sound(new URLRequest("Helicopter.mp3"));
				s.play();

			bytes = new ByteArray();

			addEventListener( Event.ENTER_FRAME, onEnterFrame );

		}

		private function onEnterFrame( event: Event ): void
		{
			SoundMixer.computeSpectrum(bytes, true, 0);

			var smooth:Number;
			var value:Number;

			graphics.clear();

			//place in middle of screen
			var xVal:Number = (stage.stageHeight / 2);

			//evenly distribute
			var spacing:Number = (stage.stageWidth / CHANNEL_LENGTH);

			var color:Number;

			//first 256 is left channell, second 256 is right channell
			for(var i:int = 0; i < CHANNEL_LENGTH; i++)
			{
				//get the next byte
				value = bytes.readFloat();


				//normalize it to be a value between 0 and 256
				value = (value * CHANNEL_LENGTH) << 0;

				//figure out the color based on the value
				color = 0xFF0000|(value << 8);

				graphics.lineStyle(1, color, 1);

				graphics.beginFill(color);

				//draw the circle, position based on width and spectrum position
				//radius scaled down to fit better
				graphics.drawCircle(i * spacing, xVal, value / 8);

			}
		}

	}
}