forked from: forked from: Sound Visualizer #02

SpectrumAnalyzer.as

by Phan.Th.Binh 08 Apr 2016

• Forked from hacker_ns7ubky2's forked from: Sound Visualizer #02
• Diff: 227
• Related works: 12
Embed

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

// SpectrumAnalyzer.as



package {



    import flash.display.*;

    import flash.media.*;

    import flash.net.*;

    import flash.utils.ByteArray;

    import flash.events.*;



    public class SpectrumAnalyzer extends Sprite {

        // Settings

        private var lineThickness : Number = 2;

        private var lineColor : Number = 0x993300;

        private var circleSize : Number = 75;

        private var scaleOnBeat : Number = 1.1; 

        // 110%

        private var reactToBeat : Number = 30;

        //

        private var music : Sound = new Sound;

        private var ba : ByteArray = new ByteArray( );

        private var __width : uint;

        private var __height : uint;



        function SpectrumAnalyzer(mp3 : String, _width : uint, _height : uint) {

            __width = _width;

            __height = _height;

            x = __width / 2;

            y = __height / 2

            music.load( new URLRequest("https://ia801005.us.archive.org/15/items/toulp6/02_Phish_Funk_Stargazing.mp3") );

            music.play( 0, 999 );

            addEventListener( Event.ENTER_FRAME, processSound );

        }



        private function processSound(ev : Event) : void {

            SoundMixer.computeSpectrum( ba, true, 0 );

            graphics.clear( );

            graphics.moveTo( 0, -circleSize );

            graphics.lineStyle( lineThickness, lineColor );

            var vol : Number = 0;

            for (var i : uint = 0; i < 512 ; i++) {

                var lev : Number = ba.readFloat( );

                vol += lev;

                var a : uint = i;

                if (i < 256) a += 256;

                if (i == 256) graphics.moveTo( 0, -circleSize );

                graphics.lineTo( -Math.sin( i / 256 * Math.PI ) * circleSize * (lev + 1), Math.cos( a / 256 * Math.PI ) * circleSize * (lev + 1) );

            }

            if (vol > reactToBeat) {

                scaleX = scaleY = scaleOnBeat;

            } else {

                scaleX = scaleY = 1;

            }

        }

        

    }

}