AudioRecord с регулировкой усиления не работает на устройстве Samsung

Я написал код для записи аудиофайла, используя AudioRecord, и при записи файла на SD-карту я делаю две версии.

Версия 1 Записанный файл сохраняется на SD-карте как есть.

Версия 2 Я применяю функцию Gain к записанному файлу и сохраняю его на SD-карту.

Это отлично работает на мобильных телефонах Sony Ericson. Также значительно увеличивается громкость звука.

Но я изо всех сил пытаюсь заставить его работать на устройствах Samsung.

когда я проигрываю записанный файл, он звучит как Talking Tom :P

Сначала я думал, что устройству Samusung не нравятся комбинации, которые я использовал для создания AudioRecorder.

Поэтому я использовал следующий подход, в котором я зацикливаюсь на доступной конфигурации и использую лучшую конфигурацию для инициализации AudioRecord.

public AudioRecord findAudioRecord() {
    for (int rate: mSampleRates) {
        for (short audioFormat: new short[] {
            AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT
        }) {
            for (short channelConfig: new short[] {
                AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO
            }) {
                try {
                    Log.i("vipul", "Attempting rate " + rate + "Hz, bits: " + audioFormat + ", channel: " + channelConfig);
                    int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat);

                    if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
                        // check if we can instantiate and have a success
                        AudioRecord recorder = new AudioRecord(
                        AudioSource.DEFAULT, rate, channelConfig, audioFormat, bufferSize);

                        if (recorder.getState() == AudioRecord.STATE_INITIALIZED) return recorder;
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
    return null;
}

Ниже приведен код, который хорошо работает на мобильных устройствах Sony. Но изо всех сил пытается работать на устройствах Samsung.

public class EnvironmentRecorder extends Activity implements OnClickListener {

    private static final int RECORDER_BPP = 16;
    private static final String AUDIO_RECORDER_FILE_EXT_WAV = ".wav";
    private static final String AUDIO_RECORDER_FOLDER = "MyRecorder";
    private static final String AUDIO_RECORDER_TEMP_FILE = "record_temp.raw";
    private static final int RECORDER_SAMPLERATE = 44100;
    private static final int RECORDER_CHANNELS = AudioFormat.CHANNEL_IN_STEREO;
    private static final int RECORDER_AUDIO_ENCODING = AudioFormat.ENCODING_PCM_16BIT;
    private Button start, stop;
    private AudioRecord recorder = null;
    private int bufferSize = 0;
    private Thread recordingThread = null;
    private boolean isRecording = false;
    private static int[] mSampleRates = new int[] {
        8000, 11025, 22050, 44100
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        start = (Button) findViewById(R.id.start);
        stop = (Button) findViewById(R.id.stop);
        start.setOnClickListener(this);
        stop.setOnClickListener(this);
    }

    @Override
    public void onClick(View view) {
        switch (view.getId()) {
        case R.id.start:
            startRecord();
            break;
        case R.id.stop:
            stopRecording();
            break;
        }
    }

    public EnvironmentRecorder() {

        try {
            bufferSize = AudioRecord.getMinBufferSize(RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING);
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    private String getFilename1() {
        String filepath = Environment.getExternalStorageDirectory().getPath();
        File file = new File(filepath, AUDIO_RECORDER_FOLDER);

        if (!file.exists()) {
            file.mkdirs();
        }

        return (file.getAbsolutePath() + "/" + "NotGained" + AUDIO_RECORDER_FILE_EXT_WAV);
    }

    private String getFilename2() {
        String filepath = Environment.getExternalStorageDirectory().getPath();
        File file = new File(filepath, AUDIO_RECORDER_FOLDER);

        if (!file.exists()) {
            file.mkdirs();
        }

        return (file.getAbsolutePath() + "/" + "Gained" + AUDIO_RECORDER_FILE_EXT_WAV);
    }

    private String getTempFilename() {
        String filepath = Environment.getExternalStorageDirectory().getPath();
        File file = new File(filepath, AUDIO_RECORDER_FOLDER);

        if (!file.exists()) {
            file.mkdirs();
        }

        File tempFile = new File(filepath, AUDIO_RECORDER_TEMP_FILE);

        if (tempFile.exists()) tempFile.delete();

        return (file.getAbsolutePath() + "/" + AUDIO_RECORDER_TEMP_FILE);
    }

    public AudioRecord findAudioRecord() {
        for (int rate: mSampleRates) {
            for (short audioFormat: new short[] {
                AudioFormat.ENCODING_PCM_8BIT, AudioFormat.ENCODING_PCM_16BIT
            }) {
                for (short channelConfig: new short[] {
                    AudioFormat.CHANNEL_IN_MONO, AudioFormat.CHANNEL_IN_STEREO
                }) {
                    try {
                        Log.v("vipul", "Attempting rate " + rate + "Hz, bits: " + audioFormat + ", channel: " + channelConfig);
                        int bufferSize = AudioRecord.getMinBufferSize(rate, channelConfig, audioFormat);

                        if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
                            // check if we can instantiate and have a success
                            AudioRecord recorder = new AudioRecord(
                            AudioSource.DEFAULT, rate, channelConfig, audioFormat, bufferSize);

                            if (recorder.getState() == AudioRecord.STATE_INITIALIZED) return recorder;
                        }
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        }
        return null;
    }

    public void startRecord() {
        /*
         * recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
         * RECORDER_SAMPLERATE, RECORDER_CHANNELS, RECORDER_AUDIO_ENCODING,
         * bufferSize);
         */

        recorder = findAudioRecord();

        recorder.startRecording();

        isRecording = true;

        recordingThread = new Thread(new Runnable() {

            @Override
            public void run() {
                writeAudioDataToFile();
            }
        }, "AudioRecorder Thread");

        recordingThread.start();
    }

    private void writeAudioDataToFile() {
        byte data[] = new byte[bufferSize];
        String filename = getTempFilename();
        FileOutputStream os = null;

        try {
            os = new FileOutputStream(filename);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        int read = 0;

        if (null != os) {
            while (isRecording) {
                read = recorder.read(data, 0, bufferSize);

                if (AudioRecord.ERROR_INVALID_OPERATION != read) {
                    try {
                        os.write(data);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                }
            }

            try {
                os.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    public void stopRecording() {
        if (null != recorder) {
            isRecording = false;

            recorder.stop();
            recorder.release();

            recorder = null;
            recordingThread = null;
            copyWaveFile(getTempFilename(), getFilename1(), getFilename2());
            deleteTempFile();
        }

    }

    private void deleteTempFile() {
        File file = new File(getTempFilename());

        file.delete();
    }

    private void copyWaveFile(String inFilename, String outFileName1, String outFileName2) {
        FileInputStream in = null;
        FileOutputStream out1 = null, out2 = null;
        long totalAudioLen = 0;
        long totalDataLen = totalAudioLen + 36;
        long longSampleRate = RECORDER_SAMPLERATE;
        int channels = 2;
        long byteRate = RECORDER_BPP * RECORDER_SAMPLERATE * channels / 8;

        byte[] data = new byte[bufferSize];

        try { in = new FileInputStream(inFilename);
            out1 = new FileOutputStream(outFileName1);
            out2 = new FileOutputStream(outFileName2);
            totalAudioLen = in.getChannel().size();
            totalDataLen = totalAudioLen + 36;

            WriteWaveFileHeader(out1, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate);
            WriteWaveFileHeader(out2, totalAudioLen, totalDataLen, longSampleRate, channels, byteRate);

            while ( in.read(data) != -1) {

                out1.write(data); // Writing Non-Gained Data

                float rGain = 2.5f;
                for (int i = 0; i < data.length / 2; i++) {

                    short curSample = getShort(data[i * 2], data[i * 2 + 1]);
                    if (rGain != 1) {
                        // apply gain
                        curSample *= rGain;
                        // convert back from short sample that was "gained" to
                        // byte data
                        byte[] a = getByteFromShort(curSample);
                        // modify buffer to contain the gained sample
                        data[i * 2] = a[0];
                        data[i * 2 + 1] = a[1];
                    }

                }

                out2.write(data); // Writing Gained Data
            }
            out1.close();
            out2.close(); in.close();

            Toast.makeText(this, "Done!!", Toast.LENGTH_LONG).show();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private short getShort(byte argB1, byte argB2) {
        return (short)((argB1 & 0xff) | (argB2 << 8));

    }

    private byte[] getByteFromShort(short x) {
        // variant 1 - noise
        byte[] a = new byte[2];
        a[0] = (byte)(x & 0xff);
        a[1] = (byte)((x >> 8) & 0xff);

        // variant 2 - noise and almost broke my ears - very loud
        // ByteBuffer buffer = ByteBuffer.allocate(2);
        // buffer.putShort(x);
        // buffer.flip();

        return a;
    }

    private void WriteWaveFileHeader(FileOutputStream out, long totalAudioLen, long totalDataLen, long longSampleRate, int channels, long byteRate)
    throws IOException {

        byte[] header = new byte[44];

        header[0] = 'R';
        header[1] = 'I';
        header[2] = 'F';
        header[3] = 'F';
        header[4] = (byte)(totalDataLen & 0xff);
        header[5] = (byte)((totalDataLen >> 8) & 0xff);
        header[6] = (byte)((totalDataLen >> 16) & 0xff);
        header[7] = (byte)((totalDataLen >> 24) & 0xff);
        header[8] = 'W';
        header[9] = 'A';
        header[10] = 'V';
        header[11] = 'E';
        header[12] = 'f';
        header[13] = 'm';
        header[14] = 't';
        header[15] = ' ';
        header[16] = 16;
        header[17] = 0;
        header[18] = 0;
        header[19] = 0;
        header[20] = 1;
        header[21] = 0;
        header[22] = (byte) channels;
        header[23] = 0;
        header[24] = (byte)(longSampleRate & 0xff);
        header[25] = (byte)((longSampleRate >> 8) & 0xff);
        header[26] = (byte)((longSampleRate >> 16) & 0xff);
        header[27] = (byte)((longSampleRate >> 24) & 0xff);
        header[28] = (byte)(byteRate & 0xff);
        header[29] = (byte)((byteRate >> 8) & 0xff);
        header[30] = (byte)((byteRate >> 16) & 0xff);
        header[31] = (byte)((byteRate >> 24) & 0xff);
        header[32] = (byte)(2 * 16 / 8);
        header[33] = 0;
        header[34] = RECORDER_BPP;
        header[35] = 0;
        header[36] = 'd';
        header[37] = 'a';
        header[38] = 't';
        header[39] = 'a';
        header[40] = (byte)(totalAudioLen & 0xff);
        header[41] = (byte)((totalAudioLen >> 8) & 0xff);
        header[42] = (byte)((totalAudioLen >> 16) & 0xff);
        header[43] = (byte)((totalAudioLen >> 24) & 0xff);

        out.write(header, 0, 44);
    }

}

Я хотел бы знать, нужно ли мне добавить какую-либо дополнительную локацию, чтобы сделать мой AudioRecord удобным для устройств Samsung.