总结就是立体录音，声道分离
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;
}
}
}
GitHub地址 下载前给star
标签：麦克风,mBuffer,录制,mAudioTrack,mBufferCount,new,Android,public,bsright From： https://www.cnblogs.com/Frank-dev-blog/p/16828261.html