playbackstopped not raised -Naudio

Question

我只想顯示audioOutput_PlaybackStopped中的messagebox。任何人都可以幫忙？我用Naudio。

這裏是我的代碼：

public void playRecordedUser() 
     { 

      pcm = new WaveChannel32(new WaveFileReader(@"D:\2.wav")); 
      //.PadWithZeroes = false; 
      reductionStream = new BlockAlignReductionStream(pcm); 
      waveOutDevice = new DirectSoundOut(); 
      waveOutDevice.PlaybackStopped += new EventHandler<StoppedEventArgs>(audioOutput_PlaybackStopped); 
      waveOutDevice.Init(reductionStream); 
      waveOutDevice.Play(); 
      // pcm.Close(); 
      // waveOutDevice.Dispose(); 
     } 

     void audioOutput_PlaybackStopped(object sender, StoppedEventArgs e) 
     { 
      MessageBox.Show("hey"); 
      waveOutDevice.Stop(); 
      reductionStream.Close(); 
      waveOutDevice.Dispose(); 
      waveOutDevice = null; 
      pcm.Close(); 
     } 

Answer 1

的問題是，WaveChannel32繼續過去您提供的流的末尾返回數據，所以產量繼續發揮永遠。

而非目前WaveFileReader的 - >WaveChannel32 - >BlockAlignReductionStream鏈，嘗試WaveFileReader - >BlockAlignReductionStream - >Wave16ToFloatProvider這樣的：

var reduce = new BlockAlignReductionStream(new WaveFileReader(@"D:\2.wav")); 
var provider = new Wave16ToFloatProvider(reduce); 

waveOutDevice = new DirectSoundOut(); 
waveOutDevice.PlaybackStopped += new EventHandler<StoppedEventArgs>(audioOutput_PlaybackStopped); 
waveOutDevice.Init(provider); 
waveOutDevice.Play(); 

這將起到波形文件的末尾，則信號重放結束。

不要忘記在播放完成後處置reduce對象。