代碼分析JAVA中PCM人聲音頻變聲處理

  /**
   * 變聲
   * @param rawPcmInputStream 原始PCM數(shù)據(jù)輸入流
   * @param speedFactor 變速率 (0,2) 大于1為加快語速，小于1為放慢語速
   * @param rateFactor 音調(diào)變化率 (0,2) 大于1為降低音調(diào)（深沉），小于1為提升音調(diào)（尖銳）
   * @return 變聲后的PCM數(shù)據(jù)輸入流
   */
  public static InputStream speechPitchShift(final InputStream rawPcmInputStream,double speedFactor,double rateFactor) {
    TarsosDSPAudioFormat format = new TarsosDSPAudioFormat(16000,16,1,true,false);
    AudioInputStream inputStream = new AudioInputStream(rawPcmInputStream, JVMAudioInputStream.toAudioFormat(format),AudioSystem.NOT_SPECIFIED);
    JVMAudioInputStream stream = new JVMAudioInputStream(inputStream);
    WaveformSimilarityBasedOverlapAdd w = new WaveformSimilarityBasedOverlapAdd(WaveformSimilarityBasedOverlapAdd.Parameters.speechDefaults(speedFactor, 16000));
    int inputBufferSize = w.getInputBufferSize();
    int overlap = w.getOverlap();
    AudioDispatcher dispatcher = new AudioDispatcher(stream, inputBufferSize ,overlap);
    w.setDispatcher(dispatcher);
    AudioOutputToByteArray out = new AudioOutputToByteArray();
    dispatcher.addAudioProcessor(w);
    dispatcher.addAudioProcessor(new RateTransposer(rateFactor));
    dispatcher.addAudioProcessor(out);
    dispatcher.run();
    return new ByteArrayInputStream(out.getData());
  }

public class AudioOutputToByteArray implements AudioProcessor {
  private boolean isDone = false;
  private byte[] out = null;
  private ByteArrayOutputStream bos;
  public AudioOutputToByteArray() {
    bos = new ByteArrayOutputStream();
  }
  public byte[] getData() {
    while (!isDone && out == null) {
      try {
        Thread.sleep(10);
      } catch (InterruptedException ignored) {}
    }
    return out;
  }
  @Override
  public boolean process(AudioEvent audioEvent) {
    bos.write(audioEvent.getByteBuffer(),0,audioEvent.getByteBuffer().length);
    return true;
  }
  @Override
  public void processingFinished() {
    out = bos.toByteArray().clone();
    bos = null;
    isDone = true;
  }
}

  /**
   * 播放PCM
   *
   * 不要在非桌面環(huán)境調(diào)用。。。鬼知道會發(fā)生什么
   * @param rawPcmInputStream 原始PCM數(shù)據(jù)輸入流
   * @throws LineUnavailableException
   */
  public static void play(final InputStream rawPcmInputStream) throws LineUnavailableException {
    TarsosDSPAudioFormat format = new TarsosDSPAudioFormat(16000,16,1,true,false);
    AudioInputStream inputStream = new AudioInputStream(rawPcmInputStream, JVMAudioInputStream.toAudioFormat(format),AudioSystem.NOT_SPECIFIED);
    JVMAudioInputStream stream = new JVMAudioInputStream(inputStream);
    AudioDispatcher dispatcher = new AudioDispatcher(stream, 1024 ,0);
    dispatcher.addAudioProcessor(new AudioPlayer(format,1024));
    dispatcher.run();
  }