forked from: ff: Adaptive normalization test
forked from ff: Adaptive normalization test (diff: 1)
Adatptive normalization test.
ActionScript3 source code
/**
* Copyright yangliu9812 ( http://wonderfl.net/user/yangliu9812 )
* MIT License ( http://www.opensource.org/licenses/mit-license.php )
* Downloaded from: http://wonderfl.net/c/2iwM
*/
// forked from makc3d's ff: Adaptive normalization test
package {
import flash.display.Bitmap;
import flash.display.BitmapData;
import flash.display.Sprite;
import flash.events.Event;
import flash.events.MouseEvent;
import flash.media.SoundChannel;
import flash.media.SoundMixer;
import flash.utils.ByteArray;
/**
* Adatptive normalization test.
*/
[SWF(backgroundColor=0)]
public class NormalizerTest extends Sprite {
public var mp3:ClientMP3Loader;
public var bmp:BitmapData;
public var song:SoundChannel;
public function NormalizerTest () {
mp3 = new ClientMP3Loader;
mp3.addEventListener (Event.COMPLETE, loaded);
bmp = new BitmapData (400, 100, true, 0);
with (addChild (new Bitmap (bmp))) {
x = 30; y = 260;
}
stage.addEventListener (MouseEvent.CLICK, click);
stage.addEventListener (Event.ENTER_FRAME, loop);
}
public function click (e:MouseEvent):void {
mp3.load ();
}
public function loaded (e:Event):void {
if (song) song.stop ();
song = mp3.sound.play (0, int.MAX_VALUE);
}
public var ba:ByteArray = new ByteArray, a:Array = [], b:Array = [];
public function loop (e:Event):void {
SoundMixer.computeSpectrum (ba, true);
for (var i:int = 0; i < 100; i++) {
a [i] = 0.5 * (ba.readFloat () + ba.readFloat ());
if (i >= b.length) b [i] = new Normalizer;
}
graphics.clear ();
// as is
graphics.beginFill (0xFF0000);
for (i = 0; i < 100; i++) {
graphics.drawRect (30 + i * 4, 120, 4, -100 * a [i]);
}
graphics.endFill ();
// normalized
graphics.beginFill (0xFF00);
for (i = 0; i < 100; i++) {
graphics.drawRect (30 + i * 4, 240, 4, -100 * Normalizer (b [i]).f (a [i]));
}
// + avg values
for (i = 0; i < 100; i++) {
graphics.drawRect (30 + i * 4, 120 -100 * Normalizer (b [i]).average (), 4, 1);
}
graphics.endFill ();
// graph
var va:Number = a [4];
var vb:Number = Normalizer (b [4]).lastValue ();
bmp.scroll ( -1, 0);
bmp.setPixel32 (399, 0, 0xFFFFFFFF - bmp.getPixel32 (398, 0));
for (i = 1; i < 99; i++) {
var c:uint = 0xFF000000;
if (i > 100 * (1 - va)) c += 0xFF0000;
if (i > 100 * (1 - vb)) c += 0x00FF00;
bmp.setPixel32 (399, i, c);
}
bmp.setPixel32 (399, 99, 0xFFFFFFFF);
}
}
}
/**
* 2nd draft of Normalizer class.
*/
class Normalizer {
/** Damping. */
public var d:Number = 0.9;
/** Maximum minimum. */
public var e:Number = 0.1;
private var avg:Number = 0.5;
private var val:Number = 0;
public function average ():Number { return avg; }
public function lastValue ():Number { return val; }
public function f (x:Number):Number {
avg = d * avg + (1 - d) * x;
// f(x)=1-exp(ax); f(avg)=0.5; a=?
var a:Number = - Math.LN2 / Math.max (avg, e);
val = 1 - Math.exp (a * x);
return val;
}
}
import com.codeazur.as3swf.SWF;
import com.codeazur.as3swf.SWFData;
import com.codeazur.as3swf.data.SWFScene;
import com.codeazur.as3swf.data.SWFSymbol;
import com.codeazur.as3swf.data.consts.SoundCompression;
import com.codeazur.as3swf.data.consts.SoundRate;
import com.codeazur.as3swf.data.consts.SoundSize;
import com.codeazur.as3swf.data.consts.SoundType;
import com.codeazur.as3swf.tags.TagDefineSceneAndFrameLabelData;
import com.codeazur.as3swf.tags.TagDefineSound;
import com.codeazur.as3swf.tags.TagDoABC;
import com.codeazur.as3swf.tags.TagEnd;
import com.codeazur.as3swf.tags.TagFileAttributes;
import com.codeazur.as3swf.tags.TagSetBackgroundColor;
import com.codeazur.as3swf.tags.TagShowFrame;
import com.codeazur.as3swf.tags.TagSymbolClass;
import flash.display.Loader;
import flash.display.LoaderInfo;
import flash.events.Event;
import flash.events.EventDispatcher;
import flash.media.Sound;
import flash.net.FileFilter;
import flash.net.FileReference;
import flash.utils.ByteArray;
/**
* This loads MP3 from HDD.
*
* @see http://wiki.github.com/claus/as3swf/play-mp3-directly-from-bytearray
* @see http://github.com/claus/as3swf/raw/master/bin/as3swf.swc
*/
class ClientMP3Loader extends EventDispatcher {
/**
* Use this object after Event.COMPLETE.
*/
public var sound:Sound;
/**
* Call this to load MP3 from HDD.
*/
public function load ():void {
file = new FileReference;
file.addEventListener (Event.CANCEL, onUserCancelled);
file.addEventListener (Event.SELECT, onFileSelected);
file.addEventListener (Event.COMPLETE, onFileLoaded);
file.browse ([ new FileFilter ("MP3 files", "*.mp3") ]);
}
private var file:FileReference;
private function onUserCancelled (e:Event):void { dispatchEvent (new Event (Event.CANCEL)); }
private function onFileSelected (e:Event):void { file.load (); }
private function onFileLoaded (e:Event):void {
// Wrap the MP3 with a SWF
var swf:ByteArray = createSWFFromMP3 (file.data);
// Load the SWF with Loader::loadBytes()
var loader:Loader = new Loader();
loader.contentLoaderInfo.addEventListener(Event.INIT, initHandler);
loader.loadBytes(swf);
}
private function initHandler(e:Event):void {
// Get the sound class definition
var SoundClass:Class = LoaderInfo(e.currentTarget).applicationDomain.getDefinition("MP3Wrapper_soundClass") as Class;
// Instantiate the sound class
sound = new SoundClass() as Sound;
// Report Event.COMPLETE
dispatchEvent (new Event (Event.COMPLETE));
}
private function createSWFFromMP3(mp3:ByteArray):ByteArray
{
// Create an empty SWF
// Defaults to v10, 550x400px, 50fps, one frame (works fine for us)
var swf:SWF = new SWF();
// Add FileAttributes tag
// Defaults: as3 true, all other flags false (works fine for us)
swf.tags.push(new TagFileAttributes());
// Add SetBackgroundColor tag
// Default: white background (works fine for us)
swf.tags.push(new TagSetBackgroundColor());
// Add DefineSceneAndFrameLabelData tag
// (with the only entry being "Scene 1" at offset 0)
var defineSceneAndFrameLabelData:TagDefineSceneAndFrameLabelData = new TagDefineSceneAndFrameLabelData();
defineSceneAndFrameLabelData.scenes.push(new SWFScene(0, "Scene 1"));
swf.tags.push(defineSceneAndFrameLabelData);
// Add DefineSound tag
// The ID is 1, all other parameters are automatically
// determined from the mp3 itself.
swf.tags.push(TagDefineSound.createWithMP3(1, mp3));
// Add DoABC tag
// Contains the AS3 byte code for the document class and the
// class definition for the embedded sound
swf.tags.push(TagDoABC.create(abc));
// Add SymbolClass tag
// Specifies the document class and binds the sound class
// definition to the embedded sound
var symbolClass:TagSymbolClass = new TagSymbolClass();
symbolClass.symbols.push(SWFSymbol.create(1, "MP3Wrapper_soundClass"));
symbolClass.symbols.push(SWFSymbol.create(0, "MP3Wrapper"));
swf.tags.push(symbolClass);
// Add ShowFrame tag
swf.tags.push(new TagShowFrame());
// Add End tag
swf.tags.push(new TagEnd());
// Publish the SWF
var swfData:SWFData = new SWFData();
swf.publish(swfData);
return swfData;
}
private static var abcData:Array = [
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private static function abcDataToByteArray():ByteArray {
var ba:ByteArray = new ByteArray();
for (var i:uint = 0; i < abcData.length; i++) {
ba.writeByte(abcData[i]);
}
return ba;
}
private static var abc:ByteArray = abcDataToByteArray();
}