当着色器完成时检测混合音频

Question

所以这个代码与它我能够混合几个轨道 与在像素弯曲机中完成的着色器。 这里的问题时，混合完成或所有的声音中游他们的最终 能够的ByteArray保存到一个文件中的任何事件或类似的

帮助PLZ东西，我不知道吗？

package 
{ 
    import flash.display.*; 
    import flash.media.*; 
    import flash.events.*; 
    import flash.net.*; 
    import flash.utils.*; 
    import fl.controls.Slider; 
    import org.bytearray.micrecorder.encoder.WaveEncoder; 

    [SWF(width='500', height='380', frameRate='24')] 

    public class AudioMixer extends Sprite{ 

     [Embed(source = "sound2.mp3")] private var Track1:Class;   
     [Embed(source = "sound1.mp3")] private var Track2:Class;   

     [Embed(source = "mix.pbj",mimeType = "application/octet-stream")] 
     private var EmbedShader:Class; 

     private var shader:Shader = new Shader(new EmbedShader()); 

     private var sound:Vector.<Sound> = new Vector.<Sound>();  
     private var bytes:Vector.<ByteArray> = new Vector.<ByteArray>(); 
     private var sliders:Vector.<Slider> = new Vector.<Slider>(); 
     private var graph:Vector.<Shape> = new Vector.<Shape>(); 
     private var recBA:ByteArray = new ByteArray(); 
     private var BUFFER_SIZE:int = 0x800; 
     public var playback:Sound = new Sound(); 
     public var container:Sprite = new Sprite(); 
     public var isEvent:Boolean = false; 
     public function AudioMixer():void{ 
      container.y = stage.stageHeight * .5; 
      addChild(container); 

      sound.push(new Track1(), new Track2(),new Track2(),new Track2(),new Track2(),new Track2(),new Track2(),new Track2(),new Track2(),new Track2(),new Track2(),new Track2()); 

      for(var i:int = 0; i < sound.length; i++){ 
       var slider:Slider = new Slider(); 
       slider.maximum = 1; 
       slider.minimum = 0; 
       slider.snapInterval = 0.025; 
       slider.value = 0.8; 
       slider.rotation += -90; 
       slider.x = i * 40 + 25; 
       container.addChild(slider); 
       sliders.push(slider); 

       var line:Shape = new Shape(); 
       line.graphics.lineStyle(1, 0x888888); 
       line.graphics.drawRect(i * 40 + 14, 0, 5, -80); 
       line.graphics.endFill(); 
       container.addChild(line); 

       var shape:Shape = new Shape();  
       shape.graphics.beginFill(0x00cc00); 
       shape.graphics.drawRect(i * 40 + 15, 0, 3, -80); 
       shape.graphics.endFill(); 
       container.addChild(shape); 
       graph.push(shape); 
      }   

      playback.addEventListener(SampleDataEvent.SAMPLE_DATA, onSoundData); 
      playback.play(); 

     } 

     private function onSoundData(event:SampleDataEvent):void { 

      for(var i:int = 0; i < sound.length; i++){ 
       bytes[i] = new ByteArray(); 
       bytes[i].length = BUFFER_SIZE * 4 * 2; 
       sound[i].extract(bytes[i], BUFFER_SIZE);     

       var volume:Number = 0; 
       bytes[i].position = 0; 

       for(var j:int = 0; j < BUFFER_SIZE; j++){ 
        volume += Math.abs(bytes[i].readFloat()); 
        volume += Math.abs(bytes[i].readFloat());     
       } 

       volume = (volume/(BUFFER_SIZE * .5)) * sliders[i].value;    

       shader.data['track' + (i + 1)].width = BUFFER_SIZE/1024; 
       shader.data['track' + (i + 1)].height = 512; 
       shader.data['track' + (i + 1)].input = bytes[i]; 
       shader.data['vol' + (i + 1)].value = [sliders[i].value]; 

       graph[i].scaleY = volume; 
      } 

      var shaderJob:ShaderJob = new ShaderJob(shader,event.data,BUFFER_SIZE/1024,512); 

      shaderJob.start(true); 
      var shaderJob2:ShaderJob = new ShaderJob(shader,recBA,BUFFER_SIZE/1024,512); 
      shaderJob2.start(true); 

     }  

    } 
} 

Answer 1

您可以使用ShaderEvent.COMPLETE侦听器判断着色器何时完成其作业。如此：

shaderJob.addEventListener(ShaderEvent.COMPLETE, onShaderComplete); 

private function onShaderComplete(e:Event):void 
{ 
    //Do Something here 
} 

有关更多详细信息，请参见this link。

虽然你的代码有一件事。你正在做一个sampleDataEvent中的着色器作业，我可以看到这是有问题的（可能），因为你的混音可能与你的播放不同步（也就是说，如果你打算混合现场并写入混合数据回到声音流中）。无论如何，这可能是一个新问题的一个问题。这应该解决您的问题，需要知道何时混合完成。

请注意，您还需要将“false”添加到shaderJob.start（false）函数。从关于ShaderEvent.COMPLETE的文档：

“当异步执行的ShaderJob完成使用着色器处理数据时调度。当为waitForCompletion参数调用start（）方法的false值时，ShaderJob实例异步执行“。

更新

在回答你关于询问如何只的SampleDataEvent内部过程中，如果正处理的声音心不是：

private var isProcessing:Boolean = false; 

private function onSoundData(event:SampleDataEvent):void { 

if(isProcessing != true){ 

      for(var i:int = 0; i < sound.length; i++){ 
       bytes[i] = new ByteArray(); 
       bytes[i].length = BUFFER_SIZE * 4 * 2; 
       sound[i].extract(bytes[i], BUFFER_SIZE);     

       var volume:Number = 0; 
       bytes[i].position = 0; 

       for(var j:int = 0; j < BUFFER_SIZE; j++){ 
        volume += Math.abs(bytes[i].readFloat()); 
        volume += Math.abs(bytes[i].readFloat());     
       } 

       volume = (volume/(BUFFER_SIZE * .5)) * sliders[i].value;    

       shader.data['track' + (i + 1)].width = BUFFER_SIZE/1024; 
       shader.data['track' + (i + 1)].height = 512; 
       shader.data['track' + (i + 1)].input = bytes[i]; 
       shader.data['vol' + (i + 1)].value = [sliders[i].value]; 

       graph[i].scaleY = volume; 
      } 

      var shaderJob:ShaderJob = new ShaderJob(shader,event.data,BUFFER_SIZE/1024,512); 

      shaderJob.start(false); 
shaderJob.addEventListener(ShaderEvent.COMPLETE, onShaderComplete); 
      var shaderJob2:ShaderJob = new ShaderJob(shader,recBA,BUFFER_SIZE/1024,512); 
      shaderJob2.start(false); 

} 

     }  

private function onShaderComplete(e:ShaderEvent):void 
{ 
    //Do something here 
    isProcessing = false; 
}