Java Code Examples for android.media.AudioFormat#CHANNEL_OUT_STEREO

The following examples show how to use android.media.AudioFormat#CHANNEL_OUT_STEREO . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: FromFileBase.java From rtmp-rtsp-stream-client-java with Apache License 2.0

8 votes

/**
 * @param filePath to video MP4 file.
 * @param bitRate AAC in kb.
 * @return true if success, false if you get a error (Normally because the encoder selected
 * doesn't support any configuration seated or your device hasn't a H264 encoder).
 * @throws IOException Normally file not found.
 */
public boolean prepareAudio(String filePath, int bitRate) throws IOException {
  audioPath = filePath;
  audioDecoder = new AudioDecoder(this, audioDecoderInterface, this);
  if (!audioDecoder.initExtractor(filePath)) return false;
  boolean result = audioEncoder.prepareAudioEncoder(bitRate, audioDecoder.getSampleRate(),
      audioDecoder.isStereo(), 0);
  prepareAudioRtp(audioDecoder.isStereo(), audioDecoder.getSampleRate());
  audioDecoder.prepareAudio();
  if (glInterface != null && !(glInterface instanceof OffScreenGlThread)) {
    int channel =
        audioDecoder.isStereo() ? AudioFormat.CHANNEL_OUT_STEREO : AudioFormat.CHANNEL_OUT_MONO;
    int buffSize = AudioTrack.getMinBufferSize(audioDecoder.getSampleRate(), channel,
        AudioFormat.ENCODING_PCM_16BIT);
    audioTrackPlayer =
        new AudioTrack(AudioManager.STREAM_MUSIC, audioDecoder.getSampleRate(), channel,
            AudioFormat.ENCODING_PCM_16BIT, buffSize, AudioTrack.MODE_STREAM);
  }
  return result;
}

Example 2

Source File: AndroidAudioForJSyn.java From science-journal with Apache License 2.0

6 votes

@Override
public void start() {
  minBufferSize =
      AudioTrack.getMinBufferSize(
          frameRate, AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_16BIT);
  System.out.println("Audio minBufferSize = " + minBufferSize);
  bufferSize = (3 * (minBufferSize / 2)) & ~3;
  System.out.println("Audio bufferSize = " + bufferSize);
  audioTrack =
      new AudioTrack(
          AudioManager.STREAM_MUSIC,
          frameRate,
          AudioFormat.CHANNEL_OUT_STEREO,
          AudioFormat.ENCODING_PCM_16BIT,
          bufferSize,
          AudioTrack.MODE_STREAM);
  audioTrack.play();
}

Example 3

Source File: OpusTrack.java From DeviceConnect-Android with MIT License

6 votes

/**
 * 指定されたサンプリングレートとチャンネル数で AudioTrack を作成します.
 */
private void createAudioTrack() {
    int bufSize = AudioTrack.getMinBufferSize(mSamplingRate,
            mChannel == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT) * 2;

    if (DEBUG) {
        Log.d(TAG, "OpusTrack::createAudioTrack");
        Log.d(TAG, "  SamplingRate: " + mSamplingRate);
        Log.d(TAG, "  Channels: " + mChannel);
        Log.d(TAG, "  AudioFormat: " + AudioFormat.ENCODING_PCM_16BIT);
        Log.d(TAG, "  BufSize: " + bufSize);
    }

    mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
            mSamplingRate,
            mChannel == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT, bufSize,
            AudioTrack.MODE_STREAM);

    mAudioTrack.play();
}

Example 4

Source File: MediaCodecBridge.java From 365browser with Apache License 2.0

6 votes

@SuppressWarnings("deprecation")
private int getAudioFormat(int channelCount) {
    switch (channelCount) {
        case 1:
            return AudioFormat.CHANNEL_OUT_MONO;
        case 2:
            return AudioFormat.CHANNEL_OUT_STEREO;
        case 4:
            return AudioFormat.CHANNEL_OUT_QUAD;
        case 6:
            return AudioFormat.CHANNEL_OUT_5POINT1;
        case 8:
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                return AudioFormat.CHANNEL_OUT_7POINT1_SURROUND;
            } else {
                return AudioFormat.CHANNEL_OUT_7POINT1;
            }
        default:
            return AudioFormat.CHANNEL_OUT_DEFAULT;
    }
}

Example 5

Source File: MediaPlayer.java From video-player with MIT License

6 votes

@SuppressLint("NewApi")
  
private int audioTrackInit(int sampleRateInHz, int channels) {
 //  this.sampleRateInHz=sampleRateInHz;
 //  this.channels=channels;
 //   return 0;
	
 audioTrackRelease();
    int channelConfig = channels >= 2 ? AudioFormat.CHANNEL_OUT_STEREO : AudioFormat.CHANNEL_OUT_MONO;
    try {
      mAudioTrackBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT);
      mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT, mAudioTrackBufferSize, AudioTrack.MODE_STREAM);
    } catch (Exception e) {
      mAudioTrackBufferSize = 0;
      Log.e("audioTrackInit", e);
    }
    return mAudioTrackBufferSize;
  }

Example 6

Source File: Sound.java From Android-Audio-Recorder with Apache License 2.0

6 votes

public AudioTrack generateTrack(int sampleRate, short[] buf, int len) {
    int end = len;

    int c = 0;

    if (RawSamples.CHANNEL_CONFIG == AudioFormat.CHANNEL_IN_MONO)
        c = AudioFormat.CHANNEL_OUT_MONO;

    if (RawSamples.CHANNEL_CONFIG == AudioFormat.CHANNEL_IN_STEREO)
        c = AudioFormat.CHANNEL_OUT_STEREO;

    // old phones bug.
    // http://stackoverflow.com/questions/27602492
    //
    // with MODE_STATIC setNotificationMarkerPosition not called
    AudioTrack track = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRate,
            c, RawSamples.AUDIO_FORMAT,
            len * (Short.SIZE / 8), AudioTrack.MODE_STREAM);
    track.write(buf, 0, len);
    if (track.setNotificationMarkerPosition(end) != AudioTrack.SUCCESS)
        throw new RuntimeException("unable to set marker");
    return track;
}

Example 7

Source File: SimpleAudioOutput.java From media-samples with Apache License 2.0

6 votes

public AudioTrack createAudioTrack(int frameRate) {
    int minBufferSizeBytes = AudioTrack.getMinBufferSize(frameRate,
            AudioFormat.CHANNEL_OUT_STEREO, AudioFormat.ENCODING_PCM_FLOAT);
    Log.i(TAG, "AudioTrack.minBufferSize = " + minBufferSizeBytes
            + " bytes = " + (minBufferSizeBytes / BYTES_PER_FRAME)
            + " frames");
    int bufferSize = 8 * minBufferSizeBytes / 8;
    int outputBufferSizeFrames = bufferSize / BYTES_PER_FRAME;
    Log.i(TAG, "actual bufferSize = " + bufferSize + " bytes = "
            + outputBufferSizeFrames + " frames");

    AudioTrack player = new AudioTrack(AudioManager.STREAM_MUSIC,
            mFrameRate, AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_FLOAT, bufferSize,
            AudioTrack.MODE_STREAM);
    Log.i(TAG, "created AudioTrack");
    return player;
}

Example 8

Source File: AndroidAudioForJSyn.java From jsyn with Apache License 2.0

5 votes

public void start() {
    Process.setThreadPriority(-5);
    minBufferSize = AudioTrack.getMinBufferSize(frameRate,
            AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_FLOAT);
    System.out.println("Audio minBufferSize = " + minBufferSize);
    bufferSize = (3 * (minBufferSize / 2)) & ~3;
    System.out.println("Audio bufferSize = " + bufferSize);
    audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, frameRate,
            AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_FLOAT, bufferSize,
            AudioTrack.MODE_STREAM);
    audioTrack.play();
}

Example 9

Source File: MediaPlayer.java From react-native-android-vitamio with MIT License

5 votes

private int audioTrackInit(int sampleRateInHz, int channels) {
  audioTrackRelease();
  int channelConfig = channels >= 2 ? AudioFormat.CHANNEL_OUT_STEREO : AudioFormat.CHANNEL_OUT_MONO;
  try {
    mAudioTrackBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT);
    mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT, mAudioTrackBufferSize, AudioTrack.MODE_STREAM);
  } catch (Exception e) {
    mAudioTrackBufferSize = 0;
    Log.e("audioTrackInit", e);
  }
  return mAudioTrackBufferSize;
}

Example 10

Source File: Track.java From K-Sonic with MIT License

5 votes

private int findFormatFromChannels(int numChannels) {
    switch (numChannels) {
        case 1:
            return AudioFormat.CHANNEL_OUT_MONO;
        case 2:
            return AudioFormat.CHANNEL_OUT_STEREO;
        default:
            return -1; // Error
    }
}

Example 11

Source File: MediaPlayer.java From HPlayer with Apache License 2.0

5 votes

public int audioTrackInit() {
//	  Log.e("  ffff mediaplayer audiotrackinit start .  sampleRateInHz:=" + sampleRateInHz + " channels:=" + channels );
	    audioTrackRelease();
	    int channelConfig = channels >= 2 ? AudioFormat.CHANNEL_OUT_STEREO : AudioFormat.CHANNEL_OUT_MONO;
	    try {
	      mAudioTrackBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT);
	      mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT, mAudioTrackBufferSize, AudioTrack.MODE_STREAM);
	    } catch (Exception e) {
	      mAudioTrackBufferSize = 0;
	      Log.e("audioTrackInit", e);
	    }
	    return mAudioTrackBufferSize;
	  }

Example 12

Source File: AudioManagerAndroid.java From android-chromium with BSD 2-Clause "Simplified" License

5 votes

/**
* Returns the minimum frame size required for audio output.
*
* @param sampleRate sampling rate
* @param channels number of channels
*/
 @CalledByNative
 private static int getMinOutputFrameSize(int sampleRate, int channels) {
     int channelConfig;
     if (channels == 1) {
         channelConfig = AudioFormat.CHANNEL_OUT_MONO;
     } else if (channels == 2) {
         channelConfig = AudioFormat.CHANNEL_OUT_STEREO;
     } else {
         return -1;
     }
     return AudioTrack.getMinBufferSize(
             sampleRate, channelConfig, AudioFormat.ENCODING_PCM_16BIT) / 2 / channels;
 }

Example 13

Source File: WebRtcAudioManager.java From webrtc_android with MIT License

5 votes

private static int getMinOutputFrameSize(int sampleRateInHz, int numChannels) {
  final int bytesPerFrame = numChannels * (BITS_PER_SAMPLE / 8);
  final int channelConfig =
      (numChannels == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO);
  return AudioTrack.getMinBufferSize(
             sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT)
      / bytesPerFrame;
}

Example 14

Source File: AudioDecoder.java From DeviceConnect-Android with MIT License

5 votes

/**
 * 指定されたサンプリングレートとチャンネル数で AudioTrack を作成します.
 */
void createAudioTrack() {
    int bufSize = AudioTrack.getMinBufferSize(mSamplingRate,
            mChannelCount == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT) * 2;

    mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
            mSamplingRate,
            mChannelCount == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT, bufSize,
            AudioTrack.MODE_STREAM);

    mAudioTrack.play();
}

Example 15

Source File: AudioDecoder.java From DeviceConnect-Android with MIT License

5 votes

/**
 * 指定されたサンプリングレートとチャンネル数で AudioTrack を作成します.
 */
void createAudioTrack() {
    int bufSize = AudioTrack.getMinBufferSize(mSamplingRate,
            mChannelCount == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT) * 2;

    mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
            mSamplingRate,
            mChannelCount == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO,
            AudioFormat.ENCODING_PCM_16BIT, bufSize,
            AudioTrack.MODE_STREAM);

    mAudioTrack.play();
}

Example 16

Source File: MediaPlayer.java From video-player with MIT License

5 votes

public int audioTrackInit() {
//	  Log.e("  ffff mediaplayer audiotrackinit start .  sampleRateInHz:=" + sampleRateInHz + " channels:=" + channels );
	    audioTrackRelease();
	    int channelConfig = channels >= 2 ? AudioFormat.CHANNEL_OUT_STEREO : AudioFormat.CHANNEL_OUT_MONO;
	    try {
	      mAudioTrackBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT);
	      mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, sampleRateInHz, channelConfig, AudioFormat.ENCODING_PCM_16BIT, mAudioTrackBufferSize, AudioTrack.MODE_STREAM);
	    } catch (Exception e) {
	      mAudioTrackBufferSize = 0;
	      Log.e("audioTrackInit", e);
	    }
	    return mAudioTrackBufferSize;
	  }

Example 17

Source File: AudioTrack.java From Exoplayer_VLC with Apache License 2.0

4 votes

/**
 * Reconfigures the audio track to play back media in {@code format}. Buffers passed to
 * {@link #handleBuffer} must using the specified {@code encoding}, which should be a constant
 * from {@link AudioFormat}.
 *
 * @param format Specifies the channel count and sample rate to play back.
 * @param encoding The format in which audio is represented.
 * @param specifiedBufferSize A specific size for the playback buffer in bytes, or 0 to use a
 *     size inferred from the format.
 */
@SuppressLint("InlinedApi")
public void reconfigure(MediaFormat format, int encoding, int specifiedBufferSize) {
  int channelCount = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
  int channelConfig;
  switch (channelCount) {
    case 1:
      channelConfig = AudioFormat.CHANNEL_OUT_MONO;
      break;
    case 2:
      channelConfig = AudioFormat.CHANNEL_OUT_STEREO;
      break;
    case 6:
      channelConfig = AudioFormat.CHANNEL_OUT_5POINT1;
      break;
    case 8:
      channelConfig = AudioFormat.CHANNEL_OUT_7POINT1;
      break;
    default:
      throw new IllegalArgumentException("Unsupported channel count: " + channelCount);
  }

  int sampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);

  // TODO: Does channelConfig determine channelCount?
  boolean isAc3 = false;//encoding == AudioFormat.ENCODING_AC3 || encoding == AudioFormat.ENCODING_E_AC3;
  if (isInitialized() && this.sampleRate == sampleRate && this.channelConfig == channelConfig
      && !this.isAc3 && !isAc3) {
    // We already have an existing audio track with the correct sample rate and channel config.
    return;
  }

  reset();

  this.encoding = encoding;
  this.sampleRate = sampleRate;
  this.channelConfig = channelConfig;
  this.isAc3 = isAc3;
  ac3Bitrate = UNKNOWN_AC3_BITRATE; // Calculated on receiving the first buffer if isAc3 is true.
  frameSize = 2 * channelCount; // 2 bytes per 16 bit sample * number of channels.
  minBufferSize = android.media.AudioTrack.getMinBufferSize(sampleRate, channelConfig, encoding);

  if (specifiedBufferSize != 0) {
    bufferSize = specifiedBufferSize;
  } else {
    int multipliedBufferSize = minBufferSize * BUFFER_MULTIPLICATION_FACTOR;
    int minAppBufferSize = (int) durationUsToFrames(MIN_BUFFER_DURATION_US) * frameSize;
    int maxAppBufferSize = (int) Math.max(minBufferSize,
        durationUsToFrames(MAX_BUFFER_DURATION_US) * frameSize);
    bufferSize = multipliedBufferSize < minAppBufferSize ? minAppBufferSize
        : multipliedBufferSize > maxAppBufferSize ? maxAppBufferSize
        : multipliedBufferSize;
  }
}

Example 18

Source File: MediaMoviePlayer.java From libcommon with Apache License 2.0

4 votes

/**
 * @param source
 * @return first audio track index, -1 if not found
 */
@SuppressLint("NewApi")
protected int internal_prepare_audio(final Object source) throws IOException {
	int trackindex = -1;
	mAudioMediaExtractor = new MediaExtractor();
	if (source instanceof String) {
		mAudioMediaExtractor.setDataSource((String)source);
	} else if (source instanceof AssetFileDescriptor) {
		if (BuildCheck.isAndroid7()) {
			mVideoMediaExtractor.setDataSource((AssetFileDescriptor)source);
		} else {
			mVideoMediaExtractor.setDataSource(((AssetFileDescriptor)source).getFileDescriptor());
		}
	} else {
		// ここには来ないけど
		throw new IllegalArgumentException("unknown source type:source=" + source);
	}
	trackindex = selectTrack(mAudioMediaExtractor, "audio/");
	if (trackindex >= 0) {
		mAudioMediaExtractor.selectTrack(trackindex);
		final MediaFormat format = mAudioMediaExtractor.getTrackFormat(trackindex);
		mAudioChannels = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
		mAudioSampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);
		final int min_buf_size = AudioTrack.getMinBufferSize(mAudioSampleRate,
			(mAudioChannels == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO),
			AudioFormat.ENCODING_PCM_16BIT);
		final int max_input_size = format.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);
		mAudioInputBufSize =  min_buf_size > 0 ? min_buf_size * 4 : max_input_size;
		if (mAudioInputBufSize > max_input_size) mAudioInputBufSize = max_input_size;
		final int frameSizeInBytes = mAudioChannels * 2;
		mAudioInputBufSize = (mAudioInputBufSize / frameSizeInBytes) * frameSizeInBytes;
		if (DEBUG) Log.v(TAG, String.format("getMinBufferSize=%d,max_input_size=%d,mAudioInputBufSize=%d",min_buf_size, max_input_size, mAudioInputBufSize));
		//
		mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
			mAudioSampleRate,
			(mAudioChannels == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO),
			AudioFormat.ENCODING_PCM_16BIT,
			mAudioInputBufSize,
			AudioTrack.MODE_STREAM);
		try {
			mAudioTrack.play();
		} catch (final Exception e) {
			Log.e(TAG, "failed to start audio track playing", e);
			mAudioTrack.release();
			mAudioTrack = null;
		}
	}
	return trackindex;
}

Example 19

Source File: WebRtcAudioTrack.java From webrtc_android with MIT License

4 votes

private int channelCountToConfiguration(int channels) {
  return (channels == 1 ? AudioFormat.CHANNEL_OUT_MONO : AudioFormat.CHANNEL_OUT_STEREO);
}

Example 20

Source File: MainActivity.java From android-fskmodem with GNU General Public License v3.0

4 votes

@Override
protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	setContentView(R.layout.activity_main);
	
	/// INIT FSK CONFIG
	
	try {
		mConfig = new FSKConfig(FSKConfig.SAMPLE_RATE_44100, FSKConfig.PCM_16BIT, FSKConfig.CHANNELS_STEREO, FSKConfig.SOFT_MODEM_MODE_4, FSKConfig.THRESHOLD_20P);
	} catch (IOException e1) {
		e1.printStackTrace();
	}

	/// INIT FSK DECODER
	
	mDecoder = new FSKDecoder(mConfig, new FSKDecoderCallback() {
		
		@Override
		public void decoded(byte[] newData) {
			
			final String text = new String(newData);
			
			runOnUiThread(new Runnable() {
				public void run() {
					
					TextView view = ((TextView) findViewById(R.id.result));
					
					view.setText(view.getText()+text);
				}
			});
		}
	});
	
	/// INIT FSK ENCODER
	
	mEncoder = new FSKEncoder(mConfig, new FSKEncoderCallback() {
		
		@Override
		public void encoded(byte[] pcm8, short[] pcm16) {
			if (mConfig.pcmFormat == FSKConfig.PCM_8BIT) {
				//8bit buffer is populated, 16bit buffer is null
				
				mAudioTrack.write(pcm8, 0, pcm8.length);
				
				mDecoder.appendSignal(pcm8);
			}
			else if (mConfig.pcmFormat == FSKConfig.PCM_16BIT) {
				//16bit buffer is populated, 8bit buffer is null
				
				mAudioTrack.write(pcm16, 0, pcm16.length);
				
				mDecoder.appendSignal(pcm16);
			}
		}
	});
	
	///
	
	mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
			mConfig.sampleRate, AudioFormat.CHANNEL_OUT_STEREO,
			AudioFormat.ENCODING_PCM_16BIT, 1024,
			AudioTrack.MODE_STREAM);
	
	mAudioTrack.play();
	
	///
	
	new Thread(mDataFeeder).start();
}