手机主副麦克风同时录音
经过
刚刚开学的时候我们开了一个小组会汇报研究情况，我也去了，当时我们遇到了一个问题就是如何让主副麦克风同时录音，他们卡了几个星期了，我只花了几个小时，由于我手机好像主副麦克风合在一起，一直弄都没用，在他的手机上面有用。立体录音，轨道分割
import static android.os.Environment.DIRECTORY_DOWNLOADS; import static android.os.Environment.getExternalStoragePublicDirectory; import android.annotation.SuppressLint; import android.content.Context; import android.media.AudioFormat; import android.media.AudioManager; import android.media.AudioRecord; import android.media.AudioTrack; import android.media.MediaRecorder; import android.os.Environment; import android.os.Handler; import android.os.Looper; import android.util.Log; import android.widget.Toast; import java.io.File; import java.io.FileOutputStream; import java.io.OutputStream; public class AudioRecoderUtils { String TAG = "AudioRecoder"; private boolean isRecording = false; private boolean isPlay = false; byte[] mBuffer = new byte[10485760]; Handler mHandler = new Handler(Looper.myLooper()) { }; static int mBufferCount = 0; AudioRecord audioRecord; AudioTrack mAudioTrack; //16K采集率 int frequency = 16000; //录音通道--立体音录音 int channel = AudioFormat.CHANNEL_IN_STEREO; //16Bit int audioEncoding = AudioFormat.ENCODING_PCM_16BIT; AudioManager mAudioManager; public AudioRecoderUtils() { } public boolean getPlay(){ return isPlay; } //停止录音 public void StopRecord() { isRecording = false; if(audioRecord != null){ audioRecord.release(); } } private AudioManager.OnAudioFocusChangeListener mAudioFocusChange = new AudioManager.OnAudioFocusChangeListener() { @Override public void onAudioFocusChange(int focusChange) { switch (focusChange) { case AudioManager.AUDIOFOCUS_LOSS: break; case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT: break; case AudioManager.AUDIOFOCUS_LOSS_TRANSIENT_CAN_DUCK: break; case AudioManager.AUDIOFOCUS_GAIN: //start(); break; } } }; //申请音频焦点 private void beforePlay(Context context) { mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE); mAudioManager.requestAudioFocus(mAudioFocusChange, AudioManager.STREAM_MUSIC, AudioManager.AUDIOFOCUS_GAIN); } //退出释放 public void releaseAudioManager(){ if (audioRecord != null) { audioRecord.release(); } if (mAudioTrack != null) { mAudioTrack.release(); } if(mAudioManager != null){ mAudioManager.abandonAudioFocus(mAudioFocusChange); } } //开始录音 public void StartRecord(Context context) { new Thread(new Runnable() { @SuppressLint("MissingPermission") public void run() { mBufferCount = 0; isPlay = false; beforePlay(context); int bufferSize = AudioRecord.getMinBufferSize(frequency, channel, audioEncoding); if (audioRecord != null) { audioRecord.release(); } long count = 0; long start = System.currentTimeMillis(); audioRecord = new AudioRecord(MediaRecorder.AudioSource.VOICE_PERFORMANCE, frequency,channel, audioEncoding, bufferSize); isRecording = true; audioRecord.startRecording(); while (isRecording) { int n = audioRecord.read(mBuffer, mBufferCount, 12000); if (n > 0) { mBufferCount += n; long cc = Math.round(((double) (System.currentTimeMillis() - start)) / 1000.0d); if (cc != count) { count = cc; } } else if (n < 0) { } } } }).start(); new Thread(new Runnable() { public void run() { savePCM(mBuffer, mBufferCount, "stereo.pcm"); } }).start(); } /** //播放音频 --- 在这里把主副MIC录制的数据单独提取出来，因为是用的CHANNEL_IN_STEREO， //注意，因为把数据区分出来了所以在new AudioTrack的时候要用CHANNEL_IN_MONO单通道播放 //如果要播放录制的原音可以就要用CHANNEL_IN_STEREO，直接用 //mAudioTrack.write(mBuffer, 0, mBufferCount); // mAudioTrack.play(); */ public void SaveRecord(Context context){ new Thread(new Runnable() { public void run() { byte[] bsleft = new byte[(mBufferCount / 2)]; int i = 0; while (i < mBufferCount - 1 && (i / 2) + 1 < mBufferCount / 2) { bsleft[i / 2] = mBuffer[i]; bsleft[(i / 2) + 1] = mBuffer[i + 1]; i += 4; } savePCM(bsleft, bsleft.length, "left.pcm"); byte[] bsright = new byte[(mBufferCount / 2)]; int j = 2; while (j < mBufferCount - 1 && (j / 2) + 1 < mBufferCount / 2) { bsright[(j / 2) - 1] = mBuffer[j]; bsright[j / 2] = mBuffer[j + 1]; bsright[(j / 2) + 1] = 0; j += 4; } savePCM(bsright, bsright.length, "right.pcm"); } }).start(); Toast.makeText(context,"成功",Toast.LENGTH_LONG).show(); } public void PlayRecord(boolean isLeft) { if (mAudioTrack != null) { mAudioTrack.release(); } isPlay = true; mAudioTrack = new AudioTrack(3, 16000, 4, 2, mBuffer.length, 0); if (isLeft) { new Thread(new Runnable() { public void run() { byte[] bsleft = new byte[(mBufferCount / 2)]; int i = 0; while (i < mBufferCount - 1 && (i / 2) + 1 < mBufferCount / 2) { bsleft[i / 2] = mBuffer[i]; bsleft[(i / 2) + 1] = mBuffer[i + 1]; i += 4; } savePCM(bsleft, bsleft.length, "left.pcm"); if (mAudioTrack != null) { try { mAudioTrack.write(bsleft, 0, bsleft.length); mAudioTrack.play(); } catch (Exception e) { isPlay = false; } } else { isPlay = false; } } }).start(); } else { new Thread(new Runnable() { public void run() { byte[] bsright = new byte[(mBufferCount / 2)]; int j = 2; while (j < mBufferCount - 1 && (j / 2) + 1 < mBufferCount / 2) { bsright[(j / 2) - 1] = mBuffer[j]; bsright[j / 2] = mBuffer[j + 1]; bsright[(j / 2) + 1] = 0; j += 4; } savePCM(bsright, bsright.length, "right.pcm"); if (mAudioTrack != null) { try { mAudioTrack.write(bsright, 0, bsright.length); mAudioTrack.play(); } catch (Exception e) { } } else { } } }).start(); } } //把录制的音频以PCM的格式写入存储里面 public String savePCM(byte[] data, int count, String name) { Log.d(TAG, "开始写入 count = " + count); String str = null; if (count <= 0) { return str; } try { File fout = new File(getExternalStoragePublicDirectory(DIRECTORY_DOWNLOADS) + "/" + name); OutputStream out = new FileOutputStream(fout); out.write(data, 0, count); out.close(); Log.d(TAG, "写入成功"); return fout.getAbsolutePath(); } catch (Exception e) { e.printStackTrace(); Log.e(TAG, "写入失败"); return str; } } }
