Question

我目前正在尝试为Android构建一个放大器。目标是记录和回放同时记录的内容。我创建了一个可以解决这个问题的线程。然而，声音变得不稳定。这是我试过的。

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

您的播放不稳定，因为AudioTrack正在挨饿而且没有顺利获取数据。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，只将AudioRecord和AudioTrack实例化一次并处理它们的事件。此外，为了帮助平滑播放，您可能应该在播放前稍微开始录制并保留录制缓冲区的队列。然后，您可以管理将这些缓冲区传递给AudioTrack，并确保始终在每个标记事件上提交一个新的缓冲区。

Android记录和播放

1 个答案: