Example usage for android.media AudioRecord getMinBufferSize

Introduction

In this page you can find the example usage for android.media AudioRecord getMinBufferSize.

Prototype

static public int getMinBufferSize(int sampleRateInHz, int channelConfig, int audioFormat) 

Source Link

Document

Returns the minimum buffer size required for the successful creation of an AudioRecord object, in byte units.

Usage

From source file:Main.java

/**
 * Get a valid sample rate for the device
 *
 * @param channelConfiguration//  w  w  w  .j a  v a2 s . c  o m
 *     the channel configuration
 * @param audioEncoding
 *     the audio encoding
 * @return the valid sample rates
 */
public static int getValidSampleRates(int channelConfiguration, int audioEncoding) {
    for (int rate : new int[] { 8000, 11025, 16000, 22050, 44100 }) { // add the rates you wish to check against
        int bffrSize = AudioRecord.getMinBufferSize(rate, channelConfiguration, audioEncoding);
        if (bffrSize > 0) {
            return bffrSize;
        }
    }
    return 0;
}

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From source file:Main.java

/**
 * Get a valid sample rate for the device
 *
 * @param channelConfiguration/* www . jav a 2s.  c  o m*/
 *     the channel configuration
 * @param audioEncoding
 *     the audio encoding
 * @return the valid sample rates
 */
public static int getValidSampleRates(int channelConfiguration, int audioEncoding) {
    for (int rate : new int[] { 8000, 11025, 16000, 22050, 44100, 48000 }) { // add the rates you wish to check against
        int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfiguration, audioEncoding);
        if (bufferSize > 0) {
            return rate;
        }
    }
    return 0;
}

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From source file:Main.java

public static final int getSampleRate(boolean lowest) {
    int sampleRate = -1;
    for (int rate : POSSIBLE_SAMPLE_RATES) {
        int bufferSize = AudioRecord.getMinBufferSize(rate, AudioFormat.CHANNEL_IN_DEFAULT,
                AudioFormat.ENCODING_PCM_16BIT);
        if (bufferSize > 0) {
            // buffer size is valid, Sample rate supported
            sampleRate = rate;//from www  .  j  a v  a 2  s .  com
            if (lowest) {
                return sampleRate;
            }
        }
    }
    return sampleRate;
}

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From source file:Main.java

public static int getBufferSize() {
    return AudioRecord.getMinBufferSize(getMaxSampleRate(), android.media.AudioFormat.CHANNEL_IN_MONO,
            android.media.AudioFormat.ENCODING_PCM_16BIT);
}

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From source file:Main.java

public static int getMaxSampleRate() {
    int maxSampleRate = -1;
    int[] possibleSampleRates = { 48000, 44100, 22050, 16000, 11025, 8000 };

    for (int i = 0; i < possibleSampleRates.length; i++) {
        int bufferSize = AudioRecord.getMinBufferSize(possibleSampleRates[i], AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT);
        if (bufferSize > 0) {
            maxSampleRate = possibleSampleRates[i];
            return maxSampleRate;
        }//w  w w . j av a  2  s  . com
    }
    return maxSampleRate;
}

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From source file:zlyh.dmitry.recaller.threading.PlayBlockThread.java

@Override
public void run() {
    AudioTrack audioTrack = null;//from  ww  w.  j a v  a  2  s. c  o m
    FileInputStream in = null;

    try {
        File rawpcm = new File(path);
        if (!rawpcm.exists()) {
            this.interrupt();
        }

        togglePlaying(true);

        final int audioLength = (int) rawpcm.length();
        final int minBufferSize = AudioRecord.getMinBufferSize(RecordRunnable.frequency,
                AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT);
        audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC, RecordRunnable.frequency,
                AudioFormat.CHANNEL_OUT_MONO, AudioFormat.ENCODING_PCM_16BIT, minBufferSize,
                AudioTrack.MODE_STREAM);

        final int block = 256 * 1024;
        byte[] byteData = new byte[block];

        try {
            in = new FileInputStream(rawpcm);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
            this.interrupt();
        }

        if (in != null) {
            try {
                int bytesread = 0;
                int offset;
                audioTrack.play();
                while (bytesread < audioLength && !isInterrupted()) {
                    offset = in.read(byteData, 0, block);
                    if (offset != -1) {
                        audioTrack.write(byteData, 0, offset);
                        bytesread += offset;
                    } else {
                        break;
                    }
                }
                in.close();

                togglePlaying(false);

                if (audioTrack.getState() == AudioTrack.PLAYSTATE_PLAYING) {
                    audioTrack.stop();
                }

                if (audioTrack.getState() == AudioTrack.STATE_INITIALIZED) {
                    audioTrack.release();
                }
            } catch (Exception e) {
                e.printStackTrace();
                try {
                    in.close();
                } catch (IOException e1) {
                    e1.printStackTrace();
                }

                if (audioTrack.getState() == AudioTrack.PLAYSTATE_PLAYING) {
                    audioTrack.stop();
                }
                if (audioTrack.getState() == AudioTrack.STATE_INITIALIZED) {
                    audioTrack.release();
                }
                togglePlaying(false);

            }
        }
    } catch (Exception e) {
        e.printStackTrace();
        if (audioTrack != null) {
            if (audioTrack.getState() == AudioTrack.PLAYSTATE_PLAYING) {
                audioTrack.stop();
            }
            if (audioTrack.getState() == AudioTrack.STATE_INITIALIZED) {
                audioTrack.release();
            }
        }

        if (in != null) {
            try {
                in.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
        togglePlaying(false);

    }

}

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From source file:com.inmobi.ultrapush.InfoRecActivity.java

@Override
protected void onResume() {
    super.onResume();
    TextView tv = (TextView) findViewById(R.id.textview_info_rec);
    tv.setMovementMethod(new ScrollingMovementMethod());

    tv.setText("Testing..."); // TODO: No use...
    tv.invalidate();//from w  w w .j a va2s . c  om

    // Show supported sample rate and corresponding minimum buffer size.
    String[] requested = new String[] { "8000", "11025", "16000", "22050", "32000", "44100", "48000", "96000" };
    String st = "sampleRate minBufSize\n";
    ArrayList<String> validated = new ArrayList<String>();
    for (String s : requested) {
        int rate = Integer.parseInt(s);
        int minBufSize = AudioRecord.getMinBufferSize(rate, AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT);
        if (minBufSize != AudioRecord.ERROR_BAD_VALUE) {
            validated.add(s);
            st += s + "  \t" + Integer.toString(minBufSize) + "\n";
        }
    }
    requested = validated.toArray(new String[0]);

    tv.setText(st);
    tv.invalidate();

    // Test audio source
    String[] audioSourceString = new String[] { "DEFAULT", "MIC", "VOICE_UPLINK", "VOICE_DOWNLINK",
            "VOICE_CALL", "CAMCORDER", "VOICE_RECOGNITION" };
    int[] audioSourceId = new int[] { MediaRecorder.AudioSource.DEFAULT, // Default audio source
            MediaRecorder.AudioSource.MIC, // Microphone audio source
            MediaRecorder.AudioSource.VOICE_UPLINK, // Voice call uplink (Tx) audio source
            MediaRecorder.AudioSource.VOICE_DOWNLINK, // Voice call downlink (Rx) audio source
            MediaRecorder.AudioSource.VOICE_CALL, // Voice call uplink + downlink audio source
            MediaRecorder.AudioSource.CAMCORDER, // Microphone audio source with same orientation as camera if available, the main device microphone otherwise (apilv7)
            MediaRecorder.AudioSource.VOICE_RECOGNITION, // Microphone audio source tuned for voice recognition if available, behaves like DEFAULT otherwise. (apilv7)
            //            MediaRecorder.AudioSource.VOICE_COMMUNICATION, // Microphone audio source tuned for voice communications such as VoIP. It will for instance take advantage of echo cancellation or automatic gain control if available. It otherwise behaves like DEFAULT if no voice processing is applied. (apilv11)
            //            MediaRecorder.AudioSource.REMOTE_SUBMIX,       // Audio source for a submix of audio streams to be presented remotely. (apilv19)
    };
    tv.append("\n-- Audio Source Test --");
    for (String s : requested) {
        int sampleRate = Integer.parseInt(s);
        int recBufferSize = AudioRecord.getMinBufferSize(sampleRate, AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT);
        tv.append("\n(" + Integer.toString(sampleRate) + "Hz, MONO, 16BIT)\n");
        for (int iass = 0; iass < audioSourceId.length; iass++) {
            st = "";
            // wait for AudioRecord fully released...
            try {
                Thread.sleep(100);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            AudioRecord record;
            record = new AudioRecord(audioSourceId[iass], sampleRate, AudioFormat.CHANNEL_IN_MONO,
                    AudioFormat.ENCODING_PCM_16BIT, recBufferSize);
            if (record.getState() == AudioRecord.STATE_INITIALIZED) {
                st += audioSourceString[iass] + " successed";
                int as = record.getAudioSource();
                if (as != audioSourceId[iass]) {
                    int i = 0;
                    while (i < audioSourceId.length) {
                        if (as == audioSourceId[iass]) {
                            break;
                        }
                        i++;
                    }
                    if (i >= audioSourceId.length) {
                        st += "(auto set to \"unknown source\")";
                    } else {
                        st += "(auto set to " + audioSourceString[i] + ")";
                    }
                }
                st += "\n";
            } else {
                st += audioSourceString[iass] + " failed\n";
            }
            record.release();
            record = null;
            tv.append(st);
            tv.invalidate();
        }
    }

}

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From source file:edu.nchu.cs.dmlab.firemap.mjpeg.RecMicToMp3.java

/**
 * Start recording//from  w  w  w  .  j a  v a2s.c o m
 */
public void start() {
    // just skip if recording has happened
    if (mIsRecording) {
        return;
    }

    new Thread() {
        @Override
        public void run() {
            if (mHandler != null)
                mHandler.sendEmptyMessage(Message.MSG_DIALOG_OPEN);
            android.os.Process.setThreadPriority(android.os.Process.THREAD_PRIORITY_URGENT_AUDIO);
            // caculate minimax buffersize
            final int minBufferSize = AudioRecord.getMinBufferSize(mSampleRate, AudioFormat.CHANNEL_IN_MONO,
                    AudioFormat.ENCODING_PCM_16BIT);
            if (minBufferSize < 0) {
                if (mHandler != null) {
                    mHandler.sendEmptyMessage(Message.MSG_ERROR_GET_MIN_BUFFERSIZE);
                }
                return;
            }
            AudioRecord audioRecord = new AudioRecord(MediaRecorder.AudioSource.MIC, mSampleRate,
                    AudioFormat.CHANNEL_IN_MONO, AudioFormat.ENCODING_PCM_16BIT, minBufferSize * 2);
            // PCM buffer size (5sec)
            short[] buffer = new short[mSampleRate * (16 / 8) * 1 * 5]; // SampleRate[Hz] * 16bit * Mono * 5sec
            byte[] mp3buffer = new byte[(int) (7200 + buffer.length * 2 * 1.25)];

            FileOutputStream output = null;
            try {
                output = new FileOutputStream(mFile);
            } catch (FileNotFoundException e) {
                if (mHandler != null) {
                    mHandler.sendEmptyMessage(Message.MSG_ERROR_CREATE_FILE);
                }
                return;
            }

            // Lame init
            SimpleLame.init(mSampleRate, 1, mSampleRate, 32);

            try {
                try {
                    audioRecord.startRecording();
                    mIsRecording = true;
                } catch (IllegalStateException e) {
                    if (mHandler != null) {
                        mHandler.sendEmptyMessage(Message.MSG_ERROR_REC_START);
                    }
                    return;
                }

                try {
                    if (mHandler != null) {
                        mHandler.sendEmptyMessage(Message.MSG_REC_STARTED);
                    }

                    int readSize = 0;
                    while (mIsRecording) {
                        readSize = audioRecord.read(buffer, 0, minBufferSize);
                        if (readSize < 0) {
                            if (mHandler != null) {
                                mHandler.sendEmptyMessage(Message.MSG_ERROR_AUDIO_RECORD);
                            }
                            break;
                            // no data
                        } else if (readSize == 0) {
                            ;
                            // fetch data
                        } else {
                            int encResult = SimpleLame.encode(buffer, buffer, readSize, mp3buffer);
                            if (encResult < 0) {
                                if (mHandler != null) {
                                    mHandler.sendEmptyMessage(Message.MSG_ERROR_AUDIO_ENCODE);
                                }
                                break;
                            }
                            if (encResult != 0) {
                                try {
                                    output.write(mp3buffer, 0, encResult);
                                } catch (IOException e) {
                                    if (mHandler != null) {
                                        mHandler.sendEmptyMessage(Message.MSG_ERROR_WRITE_FILE);
                                    }
                                    break;
                                }
                            }
                        }
                    }
                    int flushResult = SimpleLame.flush(mp3buffer);
                    if (flushResult < 0) {
                        if (mHandler != null) {
                            mHandler.sendEmptyMessage(Message.MSG_ERROR_AUDIO_ENCODE);
                        }
                    }
                    if (flushResult != 0) {
                        try {
                            output.write(mp3buffer, 0, flushResult);
                        } catch (IOException e) {
                            if (mHandler != null) {
                                mHandler.sendEmptyMessage(Message.MSG_ERROR_WRITE_FILE);
                            }
                        }
                    }

                    try {
                        output.close();
                    } catch (IOException e) {
                        if (mHandler != null) {
                            mHandler.sendEmptyMessage(Message.MSG_ERROR_CLOSE_FILE);
                        }
                    }
                } finally {
                    audioRecord.stop();
                    audioRecord.release();
                }
            } finally {
                SimpleLame.close();
                mIsRecording = false;
            }

            if (mHandler != null) {
                mHandler.sendEmptyMessage(Message.MSG_REC_STOPPED);
            }

            // Upload Audio
            uploadVoice();
            if (mHandler != null)
                mHandler.sendEmptyMessage(Message.MSG_DIALOG_CLOSE);
        }
    }.start();
}

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From source file:re.serialout.MainScreen.java

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);/*from ww  w.j a  v a 2  s  .  c  o m*/
    //Set up patient tracking
    dbhelper = new PatientDbHelper(this);
    //Set up communications
    AudioSerialOutMono.activate();
    AudioSerialOutMono.context = this.getApplicationContext();
    for (int rate : new int[] { 8000, 11025, 16000, 22050, 44100 }) {
        //Just here to make sure that the buffer types we are using are ok for the phone.
        //Debug thing.
        int bufferSize = AudioRecord.getMinBufferSize(rate, AudioFormat.CHANNEL_CONFIGURATION_DEFAULT,
                AudioFormat.ENCODING_PCM_16BIT);
        if (bufferSize > 0) {
            System.out.println("Buffer size not 0 for rate: " + rate);
        }
    }
    am = (AudioManager) this.getSystemService(Context.AUDIO_SERVICE);
    am.registerMediaButtonEventReceiver(new ComponentName(this, ButtonReciver.class));
    setUpFreqSlider();
    //        playSine.start();
    playSine.adjustFreq(14000);
    TextView pHoutput = (TextView) findViewById(R.id.instrText);
    //Check for pateint ID and log patient in
    commandInterface = new CommandInterface(buadRate, this.getApplicationContext(), pHoutput);
    if (savedInstanceState != null) {
        idSet = savedInstanceState.getBoolean("idSet");
        if (idSet) {
            idText = savedInstanceState.getString("idText");
            hideIDViews();
            settings = dbhelper.getSettings(Integer.parseInt(idText));
            if (settings.isFirstTime()) {
                Intent intent = new Intent(this, DemographicActivity.class);
                intent.putExtra("patientID", idText);
                startActivity(intent);
            }
            if (settings.isSurveyReady()) {
                (findViewById(R.id.startSurvey)).setVisibility(View.VISIBLE);
            }
        }
    }

    SharedPreferences sharedPreferences = getPreferences(MODE_PRIVATE);
    clincMode = sharedPreferences.getBoolean("clincMode", false);
    if (!clincMode) {
        System.out.println("Not in clinic mode");
        idSet = sharedPreferences.getBoolean("idSet", false);
        if (idSet) {
            idText = sharedPreferences.getString("idText", "");
            System.out.println("id is: " + idText);
            hideIDViews();
        }
    }
    //        new checkForUpdates().execute();
}

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From source file:com.example.rttytranslator.Dsp_service.java

public void startAudio() {
    if (!_enableDecoder)
        return;//w w w.  ja v  a2s  .  com

    //boolean mic = this.getPackageManager().hasSystemFeature(PackageManager.FEATURE_MICROPHONE);

    System.out.println("isRecording: " + isRecording);

    if (!isRecording) {
        isRecording = true;

        buffsize = AudioRecord.getMinBufferSize(8000, AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT);
        buffsize = Math.max(buffsize, 3000);

        mRecorder = new AudioRecord(AudioSource.MIC, 8000, AudioFormat.CHANNEL_IN_MONO,
                AudioFormat.ENCODING_PCM_16BIT, buffsize);

        mPlayer = new AudioTrack(AudioManager.STREAM_MUSIC, 8000, AudioFormat.CHANNEL_OUT_MONO,
                AudioFormat.ENCODING_PCM_16BIT, 2 * buffsize, AudioTrack.MODE_STREAM);

        if (enableEcho) {
            AudioManager manager = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
            manager.setMode(AudioManager.MODE_IN_CALL);
            manager.setSpeakerphoneOn(true);
        }

        if (mRecorder.getState() != AudioRecord.STATE_INITIALIZED) {

            mRecorder = new AudioRecord(AudioSource.DEFAULT, 8000, AudioFormat.CHANNEL_IN_MONO,
                    AudioFormat.ENCODING_PCM_16BIT, buffsize);

        }

        mRecorder.startRecording();
        System.out.println("STARTING THREAD");
        Thread ct = new captureThread();

        ct.start();
    }
}

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