android - Android记录和播放

Question

我目前正在尝试为Android构建放大器。目的是记录和回放同时记录的内容。我创建了一个线程来解决这个问题。但是，声音变得断断续续。这是我尝试过的。

private class RecordAndPlay extends Thread{
    int bufferSize;
    AudioRecord aRecord;
    short[] buffer;

    public RecordAndPlay() {
        bufferSize = AudioRecord.getMinBufferSize(22050, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
        buffer = new short[bufferSize];

    }

    @Override
    public void run() {         
            aRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, 22050, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);

            try {
                aRecord.startRecording();
            } catch (Exception e) {

            }
            int bufferedResult = aRecord.read(buffer,0,bufferSize);
            final AudioTrack aTrack = new AudioTrack(AudioManager.STREAM_MUSIC, samplingRate, AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferedResult, AudioTrack.MODE_STREAM);
            aTrack.setNotificationMarkerPosition(bufferedResult);
            aTrack.setPlaybackPositionUpdateListener(new OnPlaybackPositionUpdateListener() {

                @Override
                public void onPeriodicNotification(AudioTrack track) {
                    // TODO Auto-generated method stub

                }

                @Override
                public void onMarkerReached(AudioTrack track) {
                    Log.d("Marker reached", "...");
                    aTrack.release();                       
                    aRecord.release();
                    run();

                }
            });
            aTrack.play();
            aTrack.write(buffer, 0, buffer.length);     

    }

    public void cancel(){
        aRecord.stop();
        aRecord.release();

    }
}

Answer 1

您的播放不连贯，因为AudioTrack饿了，无法顺利获取数据。在您的代码中，您递归地调用run并为每个标记创建一个新的AudioTrack。相反，只实例化一次AudioRecord和AudioTrack并仅处理它们的事件。另外，为帮助平滑播放，您可能应该在播放之前稍微开始记录，并保持已记录缓冲区的队列。然后，您可以管理将这些缓冲区传递到AudioTrack，并确保始终在每个标记事件上提交新的缓冲区。