项目中需要用到对PCM人声音频数据进行变声处理。苦苦挣扎了一周终于找到了纯Java实现的一套框架——TarsosDSP。功能非常强大!可以实时音频处理!当然我只用到了对文件处理。实际上逻辑是一样的

TarsosDSP的GitHub地址:https://github.com/JorenSix/T...。将它整合至自己的项目工程。

具体Java工具类代码:

    /**
     * 变声
     * @param rawPcmInputStream 原始PCM数据输入流
     * @param speedFactor 变速率 (0,2) 大于1为加快语速,小于1为放慢语速
     * @param rateFactor 音调变化率 (0,2) 大于1为降低音调(深沉),小于1为提升音调(尖锐)
     * @return 变声后的PCM数据输入流
     */
    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());
    }

其中数据转录器(AudioOutputToByteArray)代码如下:

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;
    }
}

可以通过这个工具方法播放音频:

    /**
     * 播放PCM
     *
     * 不要在非桌面环境调用。。。鬼知道会发生什么
     * @param rawPcmInputStream 原始PCM数据输入流
     * @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();
    }

载入中...
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