如何从TarsosDSP AudioDispatcher获取PCM 16位数据？

Question

我想从TarsosDSP AudioDispatcher获得PCM 16位数据。我遵循这个link的音高分析实时音频流.我正在获得所需的结果，但我也希望从AudioDispatcher获得PCM数据。

AudioDispatcher adp = AudioDispatcherFactory.fromDefaultMicrophone(2048, 0);

如何从AudioDispatcher或任何其他技术获得所需的PCM数据，以便将数据从android AudioRecord传递到AudioDispatcher？

Answer 1

您可以将您的AudioDispatcherFactory对象传递给AudioDispatcherFactory.java，只需使用 audioRecorder 的额外参数创建您自己的类。

如下所示：

package com.example.revertback;

public class AudioDispatcherFactory {


public static AudioDispatcher fromDefaultMicrophone(final AudioRecord audioInputStream,final int sampleRate,
                                                    final int audioBufferSize, final int bufferOverlap) {
    int minAudioBufferSize = AudioRecord.getMinBufferSize(sampleRate,
            android.media.AudioFormat.CHANNEL_IN_MONO,
            android.media.AudioFormat.ENCODING_PCM_16BIT);
    int minAudioBufferSizeInSamples =  minAudioBufferSize/2;
    if(minAudioBufferSizeInSamples <= audioBufferSize ){

        TarsosDSPAudioFormat format = new TarsosDSPAudioFormat(sampleRate, 16,1, true, false);

        TarsosDSPAudioInputStream audioStream = new AndroidAudioInputStream(audioInputStream, format);
        //start recording ! Opens the stream.
        return new AudioDispatcher(audioStream,audioBufferSize,bufferOverlap);
    }else{
        throw new IllegalArgumentException("Buffer size too small should be at least " + (minAudioBufferSize *2));
    }
}



public static AudioDispatcher fromPipe(final String source,final int targetSampleRate, final int audioBufferSize,final int bufferOverlap){
    PipedAudioStream f = new PipedAudioStream(source);
    TarsosDSPAudioInputStream audioStream = f.getMonoStream(targetSampleRate,0);
    return new AudioDispatcher(audioStream, audioBufferSize, bufferOverlap);
}
}

在你的活动中，像这样做

AudioRecorder recorder = new AudioRecord(MediaRecorder.AudioSource.VOICE_COMMUNICATION,
            RECORDER_SAMPLERATE, RECORDER_CHANNELS,
            RECORDER_AUDIO_ENCODING, bufferSize);

    recorder.startRecording();
  AudioDispatcher dispatcher = com.example.revertback.AudioDispatcherFactory.fromDefaultMicrophone(recorder,22050,1024,0);


    PitchDetectionHandler pdh = new PitchDetectionHandler() {
        @Override
        public void handlePitch(PitchDetectionResult result, AudioEvent e) {
            final float pitchInHz = result.getPitch();

        }
    };
    AudioProcessor p = new PitchProcessor(PitchProcessor.PitchEstimationAlgorithm.FFT_YIN, 22050, 1024, pdh);
    dispatcher.addAudioProcessor(p);
    new Thread(dispatcher,"Audio Dispatcher").start();