效果：
/**
*
* *--------------------------------*
* | *** as3.0声音波形频谱系列 *** |
* *--------------------------------*
*
* 编辑修改收录：fengzi（疯子、wu341、wgq341）
*
* 不会写代码，我是代码搬运工。
*
* 联系方式：QQ（493712833）。
*
* 随 笔： https://www.cnblogs.com/fengziwu/
*
* 版权协议：请自觉遵守LGPL协议，欢迎修改、复制、转载、传播给更多需要的人。
* 免责声明：任何因使用此软件导致的纠纷与软件/程序开发者无关。
* 日 期： 2014.02.23
*
* * ------------------ Example -------------------- *
*
var spectrum:Spectrum=new Spectrum(550,400,true);
addChild(spectrum);
* @***欢迎添加修改***
**/
package
{
import flash.display.Sprite;
import flash.geom.Matrix;
import flash.utils.ByteArray;
import flash.media.SoundMixer;
import flash.events.Event;
import flash.utils.setInterval;
import flash.display.BitmapData;
import flash.display.Bitmap;
import flash.filters.BlurFilter;
import flash.filters.ColorMatrixFilter;
import flash.geom.Point;
import flash.geom.ColorTransform;
import flash.geom.Rectangle;
import flash.display.GradientType;
import flash.display.PixelSnapping;
public class Spectrum extends Sprite
{
private var bitmapData:BitmapData;
private var bitmap:Bitmap;
private var fadeFill:BitmapData;
private var gradient:Array;
private var displace:Matrix;
private var bytes:ByteArray;
private var peaks:BitmapData;
private var rect:Rectangle;
private var blur:BlurFilter;
private var colorMatrixFilter:ColorMatrixFilter;
private var thisW:Number;
private var thisH:Number;
private var _sprite:Sprite;
private var matrix:Matrix;
private var transformMatrix:Matrix;
private var _bitmapdata:BitmapData;
private var effect:Boolean;
private var wx:Number;
/***
* Spectrum
* @param w 显示的宽度
* @param h 显示的高度
* @param effect 效果选择
***/
public function Spectrum(w:Number=512,h:Number=300,effect:Boolean=true):void
{
thisW = w;
wx=w/512;
thisH = h;
this.effect = effect;
_sprite = new Sprite();
bytes = new ByteArray();
colorMatrixFilter = new ColorMatrixFilter([1,0,0,0,0,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0]);
bitmapData = new BitmapData(thisW,thisH,false,0);
peaks = new BitmapData(thisW,thisH,true,0);
gradient = createRainbowGradientArray();
rect = new Rectangle(0,0,1,0);
bitmap = addChild(new Bitmap(bitmapData,PixelSnapping.AUTO,false)) as Bitmap;
_bitmapdata = new BitmapData(thisW,thisH,true,0);
transformMatrix = new Matrix((thisW + thisW / 40) / thisW,0,0,(thisH + thisH / 80) / thisH,(-thisW / 40) /2,(-thisH /80) /8);
addChild(new Bitmap(peaks));
addEventListener(Event.ENTER_FRAME, enterFrameHandler);
}
private function enterFrameHandler(_arg_1:Event ):void
{
var float:Number;
var num:Number;
bitmapData.lock();
peaks.fillRect(peaks.rect, 0);
var colors:Array = new Array(0x00ff00,0xffff00,0xff0000,0xff0000,0xff00ff,0xff0000,0xff0000,0xffff00,0x00ff00);//颜色
var ratios:Array=new Array(20,45,80,110,128,146,185,210,235)//渐变位置
if (effect)
{
var alphas:Array= new Array(0.8,0.5,1,0.8,1,0.8,1,0.5,0.8);//透明度
}else{
alphas=[1,1,1,1,1,1,1,1,1];//透明度
ratios=[0,45,80,100,128,156,185,210,255]//渐变位置
}
var matrixs:Matrix= new Matrix();
matrixs.createGradientBox(thisW, 1, 0, 0, 0);
SoundMixer.computeSpectrum(bytes, true, 0);
_sprite.graphics.clear();
_sprite.graphics.lineStyle(0,0,0);
_sprite.graphics.beginGradientFill(GradientType.LINEAR, colors, alphas, ratios, matrixs);
/*left*/
_sprite.graphics.moveTo(thisW/2,thisH);
for (var i:int=0; i<256; i++)
{
float = bytes.readFloat() / 1.4;
if (i == 0)
{
num = float;
}
else
{
num += (float - num) / 20;
}
rect.x = i * wx + thisW / 2;
rect.y = thisH + (i >> 20) - num * thisH;
peaks.setPixel32(rect.x, rect.y, 0xFFFFFFFF);
peaks.setPixel32(i+thisW/2+i*wx, rect.y, 0xFFFFFFFF);
_sprite.graphics.lineTo(rect.x, rect.y);
}
_sprite.graphics.lineTo(thisW,thisH);
_sprite.graphics.moveTo(thisW/2, thisH);
for (i=0; i<256; i++)
{
float = bytes.readFloat() / 1.4;
if (i == 0)
{
num = float;
}
else
{
num += (float - num) / 20;
}
rect.x = thisW / 2 - i * wx;
rect.y = thisH + (i >> 20) - num * thisH;
peaks.setPixel32(rect.x, rect.y, 0xFFFFFFFF);
peaks.setPixel32(rect.x-i*wx, rect.y, 0xFFFFFFFF);
_sprite.graphics.lineTo(rect.x,rect.y);
}
_sprite.graphics.lineTo(0,thisH);
_sprite.graphics.endFill();
/**** 选择效果 ****/
if (effect)
{
_bitmapdata = bitmapData.clone();
bitmapData.draw(_bitmapdata, transformMatrix, new ColorTransform(0.90, 0.92, 0.95), null, null, true);
}
else
{
matrix=new Matrix();
matrix.translate( - thisW/2, - thisH/2);
matrix.scale(1.14,1.01);
matrix.translate(thisW/2,thisH/2);
bitmapData.draw(bitmapData,matrix,new ColorTransform(0.92,0.92,0.92));
}
/*****************************/
bitmapData.applyFilter(bitmapData,bitmapData.rect,new Point(),colorMatrixFilter);
bitmapData.applyFilter(bitmapData, bitmapData.rect, new Point(), new BlurFilter(8, 8,2));
bitmapData.draw(_sprite, null, null, "add");
bitmapData.unlock();
}
private function createRainbowGradientArray():Array
{
var clorArray:Array= new Array();
var bitmapdata:BitmapData;
var sprite:Sprite= new Sprite();
//渐变填充sprite//渐变填充sprite
var colors:Array = new Array(0xff00ff,0xff0000,0xffff00,0x00ff00);//颜色
var alphas:Array = new Array(1,1,1,1);//透明度
var ratios:Array = new Array(10,72,155,255);//渐变位置
var matrix:Matrix= new Matrix();
bitmapdata = new BitmapData(256,1,false,0);
matrix.createGradientBox(256, 1, 0, 0, 0);
//GradientType.LINEAR线性渐变
sprite.graphics.beginGradientFill(GradientType.LINEAR, colors, alphas, ratios, matrix);
sprite.graphics.drawRect(0, 0, 256, 1);
sprite.graphics.endFill();
bitmapdata.draw(sprite);
//bitmapdata的getPixel方法（获取位图sprite的颜色值）;
for (var i:int=0; i< 256; i++)
{
clorArray[i] = bitmapdata.getPixel(i,0);
}
//返回一长度为256的数组（里面装载了256个32位的颜色值）
return clorArray;
}
}
}