Java Code Examples for android.media.AudioRecord#getMinBufferSize()

The following examples show how to use android.media.AudioRecord#getMinBufferSize() . 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: VoiceRecorder.java From black-mirror with MIT License

6 votes

/**
 * Creates a new {@link AudioRecord}.
 *
 * @return A newly created {@link AudioRecord}, or null if it cannot be created (missing
 * permissions?).
 */
private AudioRecord createAudioRecord() {
    for (int sampleRate : SAMPLE_RATE_CANDIDATES) {
        final int sizeInBytes = AudioRecord.getMinBufferSize(sampleRate, CHANNEL, ENCODING);
        if (sizeInBytes == AudioRecord.ERROR_BAD_VALUE) {
            continue;
        }
        final AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
                sampleRate, CHANNEL, ENCODING, sizeInBytes);
        if (audioRecord.getState() == AudioRecord.STATE_INITIALIZED) {
            mBuffer = new byte[sizeInBytes];
            return audioRecord;
        } else {
            audioRecord.release();
        }
    }
    return null;
}

Example 2

Source File: MicrophoneSource.java From media-for-mobile with Apache License 2.0

6 votes

public synchronized void configure(int sampleRate, int channels) {
    this.sampleRate = sampleRate;
    recordChannels = channels;

    switch (recordChannels) {
        case 1: {
            androidChannels = AudioFormat.CHANNEL_IN_MONO;
        }
        break;

        case 2: {
            androidChannels = AudioFormat.CHANNEL_IN_STEREO;
        }
        break;
    }

    minBufferSize = AudioRecord.getMinBufferSize(sampleRate, androidChannels, audioEncoding);

    if (minBufferSize < 0) {
        this.sampleRate = 8000;
        minBufferSize = AudioRecord.getMinBufferSize(sampleRate, androidChannels, audioEncoding);
    }
}

Example 3

Source File: AudioDispatcherFactory.java From cythara with GNU General Public License v3.0

6 votes

/**
 * Create a new AudioDispatcher connected to the default microphone.
 * 
 * @param sampleRate
 *            The requested sample rate.
 * @param audioBufferSize
 *            The size of the audio buffer (in samples).
 * 
 * @param bufferOverlap
 *            The size of the overlap (in samples).
 * @return A new AudioDispatcher
 */
public static AudioDispatcher fromDefaultMicrophone(final int sampleRate,
		final int audioBufferSize, final int bufferOverlap) {
	int minAudioBufferSize = AudioRecord.getMinBufferSize(sampleRate,
			android.media.AudioFormat.CHANNEL_IN_MONO,
			android.media.AudioFormat.ENCODING_PCM_16BIT);
	int minAudioBufferSizeInSamples =  minAudioBufferSize/2;
	if(minAudioBufferSizeInSamples <= audioBufferSize ){
	AudioRecord audioInputStream = new AudioRecord(
			MediaRecorder.AudioSource.MIC, sampleRate,
			android.media.AudioFormat.CHANNEL_IN_MONO,
			android.media.AudioFormat.ENCODING_PCM_16BIT,
			audioBufferSize * 2);

	TarsosDSPAudioFormat format = new TarsosDSPAudioFormat(sampleRate, 16,1, true, false);
	
	TarsosDSPAudioInputStream audioStream = new AndroidAudioInputStream(audioInputStream, format);
	//start recording ! Opens the stream.
	audioInputStream.startRecording();
	return new AudioDispatcher(audioStream,audioBufferSize,bufferOverlap);
	}else{
		throw new IllegalArgumentException("Buffer size too small should be at least " + (minAudioBufferSize *2));
	}
}

Example 4

Source File: Doppler.java From doppler-android with MIT License

6 votes

public Doppler() {
    //write a check to see if stereo is supported
    bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
    buffer = new short[bufferSize];

    frequency = PRELIM_FREQ;
    freqIndex = PRELIM_FREQ_INDEX;

    frequencyPlayer = new FrequencyPlayer(PRELIM_FREQ);

    microphone = new AudioRecord(MediaRecorder.AudioSource.VOICE_RECOGNITION, DEFAULT_SAMPLE_RATE,
            AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, bufferSize);

    mHandler = new Handler();

    calibrator = new Calibrator();
}

Example 5

Source File: SpeaktoitRecognitionServiceImpl.java From dialogflow-android-client with Apache License 2.0

6 votes

private void init() {
    synchronized (recognizerLock) {
        final int bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE_IN_HZ, CHANNEL_CONFIG, AUDIO_FORMAT);

        audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
                SAMPLE_RATE_IN_HZ,
                CHANNEL_CONFIG,
                AUDIO_FORMAT,
                bufferSize);

        vad.setEnabled(config.isVoiceActivityDetectionEnabled());
        vad.setSpeechListener(this);

        mediaPlayer = new MediaPlayer();
        mediaPlayer.setOnErrorListener(this);
        mediaPlayer.setOnCompletionListener(this);
    }
}

Example 6

Source File: PcmToWavUtil.java From PhotoMovie with Apache License 2.0

5 votes

/**
 * @param sampleRate sample rate、采样率
 * @param channelConfig    channel、声道
 * @param encoding   Audio data format、音频格式
 */
public PcmToWavUtil(int sampleRate, int channelConfig, int channelCount, int encoding) {
    this.mSampleRate = sampleRate;
    this.mChannelConfig = channelConfig;
    this.mChannelCount = channelCount;
    this.mEncoding = encoding;
    this.mBufferSize = AudioRecord.getMinBufferSize(mSampleRate, mChannelConfig, mEncoding);
}

Example 7

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

5 votes

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

Example 8

Source File: AudioRecordThread.java From dcs-sdk-java with Apache License 2.0

5 votes

public AudioRecordThread(LinkedBlockingDeque<byte[]> linkedBlockingDeque) {
    this.linkedBlockingDeque = linkedBlockingDeque;
    bufferSize = AudioRecord.getMinBufferSize(SAMPLE_RATE_HZ, AudioFormat.CHANNEL_IN_MONO,
            AudioFormat.ENCODING_PCM_16BIT);
    audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, SAMPLE_RATE_HZ, AudioFormat.CHANNEL_IN_MONO,
            AudioFormat.ENCODING_PCM_16BIT, bufferSize);
}

Example 9

Source File: AudioRecorder.java From euphony with Apache License 2.0

5 votes

/**
 * Constructor.
 * 
 * @param sampleRate
 *            The sample rate (e.g. 44100 Hz).
 */
public AudioRecorder(int sampleRate) {
	int bufferSize = AudioRecord.getMinBufferSize(sampleRate,
			AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT);
	
	audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
			sampleRate, AudioFormat.CHANNEL_CONFIGURATION_MONO,
			AudioFormat.ENCODING_PCM_16BIT, bufferSize);
	swtWindowing = false;
}

Example 10

Source File: MediaAudioEncoder.java From UVCCameraZxing with Apache License 2.0

5 votes

@Override
 	public void run() {
 		try {
          final int buf_sz = AudioRecord.getMinBufferSize(
          	SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT) * 4;
          final AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
          	SAMPLE_RATE, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, buf_sz);
          try {
          	if (mIsCapturing) {
  				if (DEBUG) Log.v(TAG, "AudioThread:start audio recording");
               final byte[] buf = new byte[buf_sz];
               int readBytes;
               audioRecord.startRecording();
               try {
	    		while (mIsCapturing && !mRequestStop && !mIsEOS) {
	    			// read audio data from internal mic
	    			readBytes = audioRecord.read(buf, 0, buf_sz);
	    			if (readBytes > 0) {
	    			    // set audio data to encoder
	    				encode(buf, readBytes, getPTSUs());
	    				frameAvailableSoon();
	    			}
	    		}
   				frameAvailableSoon();
               } finally {
               	audioRecord.stop();
               }
          	}
          } finally {
          	audioRecord.release();
          }
 		} catch (final Exception e) {
 			Log.e(TAG, "AudioThread#run", e);
 		}
if (DEBUG) Log.v(TAG, "AudioThread:finished");
 	}

Example 11

Source File: RecordAudioTester.java From PermissionAgent with Apache License 2.0

5 votes

private static AudioRecord findAudioRecord() {
    for (int rate : RATES) {
        for (short format : new short[] {AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT}) {
            for (short channel : new short[] {AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO}) {
                int buffer = AudioRecord.getMinBufferSize(rate, channel, format);
                if (buffer != AudioRecord.ERROR_BAD_VALUE) {
                    AudioRecord recorder = new AudioRecord(MediaRecorder.AudioSource.MIC, rate, channel, format,
                        buffer);
                    if (recorder.getState() == AudioRecord.STATE_INITIALIZED) return recorder;
                }
            }
        }
    }
    return null;
}

Example 12

Source File: StreamPublisher.java From AndroidInstantVideo with Apache License 2.0

5 votes

private StreamPublisherParam(int width, int height, int videoBitRate, int frameRate,
                            int iframeInterval, int samplingRate, int audioBitRate, int audioSource, int channelCfg) {
    this.width = width;
    this.height = height;
    this.videoBitRate = videoBitRate;
    this.frameRate = frameRate;
    this.iframeInterval = iframeInterval;
    this.samplingRate = samplingRate;
    this.audioBitRate = audioBitRate;
    this.audioBufferSize = AudioRecord.getMinBufferSize(samplingRate, channelCfg, AudioFormat.ENCODING_PCM_16BIT) * 2;
    this.audioSource = audioSource;
    this.channelCfg = channelCfg;
}

Example 13

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

5 votes

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

Example 14

Source File: MyAudioRecord.java From AndroidScreenShare with Apache License 2.0

4 votes

private void init(){
    int minBufferSize = AudioRecord.getMinBufferSize(mSampleRate, mChannelMode,
            mEncodeFormat);
    mAudioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC,
            mSampleRate, mChannelMode, mEncodeFormat, minBufferSize * 2);
}

Example 15

Source File: CheckPermission.java From EasyPhotos with Apache License 2.0

4 votes

/**
 * 用于检测是否具有录音权限
 *
 * @return
 */
public static int getRecordState() {
    int minBuffer = AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat
            .ENCODING_PCM_16BIT);
    AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, 44100, AudioFormat
            .CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, (minBuffer * 100));
    short[] point = new short[minBuffer];
    int readSize = 0;
    try {

        audioRecord.startRecording();//检测是否可以进入初始化状态
    } catch (Exception e) {
        if (audioRecord != null) {
            audioRecord.release();
            audioRecord = null;
        }
        return STATE_NO_PERMISSION;
    }
    if (audioRecord.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
        //6.0以下机型都会返回此状态，故使用时需要判断bulid版本
        //检测是否在录音中
        if (audioRecord != null) {
            audioRecord.stop();
            audioRecord.release();
            audioRecord = null;
            LogUtil.d("录音机被占用");
        }
        return STATE_RECORDING;
    } else {
        //检测是否可以获取录音结果

        readSize = audioRecord.read(point, 0, point.length);


        if (readSize <= 0) {
            if (audioRecord != null) {
                audioRecord.stop();
                audioRecord.release();
                audioRecord = null;

            }
            LogUtil.d("录音的结果为空");
            return STATE_NO_PERMISSION;

        } else {
            if (audioRecord != null) {
                audioRecord.stop();
                audioRecord.release();
                audioRecord = null;

            }

            return STATE_SUCCESS;
        }
    }
}

Example 16

Source File: AudioRecorder.java From connectivity-samples with Apache License 2.0

4 votes

@Override
protected int getMinBufferSize(int sampleRate) {
  return AudioRecord.getMinBufferSize(
      sampleRate, AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
}

Example 17

Source File: CheckPermission.java From CameraView with Apache License 2.0

4 votes

/**
 * 用于检测是否具有录音权限
 *
 * @return
 */
public static int getRecordState() {
    int minBuffer = AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat
            .ENCODING_PCM_16BIT);
    AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, 44100, AudioFormat
            .CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, (minBuffer * 100));
    short[] point = new short[minBuffer];
    int readSize = 0;
    try {

        audioRecord.startRecording();//检测是否可以进入初始化状态
    } catch (Exception e) {
        if (audioRecord != null) {
            audioRecord.release();
            audioRecord = null;
        }
        return STATE_NO_PERMISSION;
    }
    if (audioRecord.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
        //6.0以下机型都会返回此状态，故使用时需要判断bulid版本
        //检测是否在录音中
        if (audioRecord != null) {
            audioRecord.stop();
            audioRecord.release();
            audioRecord = null;
            Log.d("CheckAudioPermission", "录音机被占用");
        }
        return STATE_RECORDING;
    } else {
        //检测是否可以获取录音结果

        readSize = audioRecord.read(point, 0, point.length);


        if (readSize <= 0) {
            if (audioRecord != null) {
                audioRecord.stop();
                audioRecord.release();
                audioRecord = null;

            }
            Log.d("CheckAudioPermission", "录音的结果为空");
            return STATE_NO_PERMISSION;

        } else {
            if (audioRecord != null) {
                audioRecord.stop();
                audioRecord.release();
                audioRecord = null;

            }

            return STATE_SUCCESS;
        }
    }
}

Example 18

Source File: PermissionUtil.java From AlbumCameraRecorder with MIT License

4 votes

/**
 * 用于检测是否具有录音权限
 *
 * @return 状态：是否具有
 */
public static int getRecordState() {
    int minBuffer = AudioRecord.getMinBufferSize(44100, AudioFormat.CHANNEL_IN_MONO, AudioFormat
            .ENCODING_PCM_16BIT);
    AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.DEFAULT, 44100, AudioFormat
            .CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, (minBuffer * 100));
    short[] point = new short[minBuffer];
    int readSize;
    try {

        audioRecord.startRecording();//检测是否可以进入初始化状态
    } catch (Exception e) {
        if (audioRecord != null) {
            audioRecord.release();
            audioRecord = null;
        }
        return STATE_NO_PERMISSION;
    }
    if (audioRecord.getRecordingState() != AudioRecord.RECORDSTATE_RECORDING) {
        //6.0以下机型都会返回此状态，故使用时需要判断bulid版本
        //检测是否在录音中
        if (audioRecord != null) {
            audioRecord.stop();
            audioRecord.release();
            Log.d("CheckAudioPermission", "录音机被占用");
        }
        return STATE_RECORDING;
    } else {
        //检测是否可以获取录音结果

        readSize = audioRecord.read(point, 0, point.length);


        if (readSize <= 0) {
            if (audioRecord != null) {
                audioRecord.stop();
                audioRecord.release();

            }
            Log.d("CheckAudioPermission", "录音的结果为空");
            return STATE_NO_PERMISSION;

        } else {
            if (audioRecord != null) {
                audioRecord.stop();
                audioRecord.release();

            }

            return STATE_SUCCESS;
        }
    }
}

Example 19

Source File: Record.java From SinVoiceDemo with Apache License 2.0

4 votes

public void start() {
    if (STATE_STOP == mState) {
        mState = STATE_START;

        switch (mChannel) {
        case CHANNEL_1:
            mChannelConfig = AudioFormat.CHANNEL_IN_MONO;
            break;
        case CHANNEL_2:
            mChannelConfig = AudioFormat.CHANNEL_IN_STEREO;
            break;
        }

        switch (mBits) {
        case BITS_8:
            mAudioEncoding = AudioFormat.ENCODING_PCM_8BIT;
            break;

        case BITS_16:
            mAudioEncoding = AudioFormat.ENCODING_PCM_16BIT;
            break;
        }

        int minBufferSize = AudioRecord.getMinBufferSize(mFrequence, mChannelConfig, mAudioEncoding);
        LogHelper.d(TAG, "minBufferSize:" + minBufferSize);

        AudioRecord record = new AudioRecord(MediaRecorder.AudioSource.MIC, mFrequence, mChannelConfig, mAudioEncoding, mBufferSize);
        record.startRecording();
        LogHelper.d(TAG, "record start");

        if (null != mCallback) {
            if (null != mListener) {
                mListener.onStartRecord();
            }

            while (STATE_START == mState) {
                BufferData data = mCallback.getRecordBuffer();
                if (null != data) {
                    if (null != data.byteData) {
                        int bufferReadResult = record.read(data.byteData, 0, mBufferSize);
                        data.setFilledSize(bufferReadResult);

                        mCallback.freeRecordBuffer(data);
                    } else {
                        // end of input
                        LogHelper.d(TAG, "get end input data, so stop");
                        break;
                    }
                } else {
                    LogHelper.d(TAG, "get null data");
                    break;
                }
            }

            if (null != mListener) {
                mListener.onStopRecord();
            }
        }

        record.stop();
        record.release();

        LogHelper.d(TAG, "record stop");
    }
}

Example 20

Source File: AudioCapture.java From EvilsLive with MIT License

3 votes

public boolean startCapture(int audioSource, int sampleRateInHz, int channelConfig, int audioFormat) {

        if (mIsCaptureStarted) {
            Log.e(TAG, "hujd Capture already started !");
            return false;
        }

        mMinBufferSize = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);

        if (mMinBufferSize == AudioRecord.ERROR_BAD_VALUE) {
            Log.e(TAG, "hujd Invalid parameter !");
            return false;
        }

        Log.e(TAG, "hujd getMinBufferSize = " + mMinBufferSize + " bytes !");

        mAudioRecord = new AudioRecord(audioSource, sampleRateInHz, channelConfig, audioFormat, mMinBufferSize);

        if (mAudioRecord.getState() == AudioRecord.STATE_UNINITIALIZED) {
            Log.e(TAG, "hujd AudioRecord initialize fail !");
            return false;
        }

        mAudioRecord.startRecording();


        mIsLoopExit = false;
        mCaptureThread = new Thread(new AudioCaptureRunnable());

        mCaptureThread.start();

        mIsCaptureStarted = true;

        Log.e(TAG, "hujd Start audio capture success !");
        return true;

    }