Java AudioRecord.STATE_INITIALIZED屬性代碼示例

/**
 * <p>Starts the recording, and sets the state to RECORDING.</p>
 */
public void start() {
	if (mRecorder.getState() == AudioRecord.STATE_INITIALIZED) {
		mRecorder.startRecording();
		if (mRecorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
			setState(State.RECORDING);
			new Thread() {
				public void run() {
					while (mRecorder != null && mRecorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
						int status = read(mRecorder);
						if (status < 0) {
							break;
						}
					}
				}
			}.start();
		} else {
			Log.e(LOG_TAG, "startRecording() failed");
			setState(State.ERROR);
		}
	} else {
		Log.e(LOG_TAG, "start() called on illegal state");
		setState(State.ERROR);
	}
}
 

/**
 * 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;
}
 

/**
 * <p>Stops the recording, and sets the state to STOPPED.
 * If stopping fails then sets the state to ERROR.</p>
 */
public void stop() {
	// We check the underlying AudioRecord state trying to avoid IllegalStateException.
	// If it still occurs then we catch it.
	if (mRecorder.getState() == AudioRecord.STATE_INITIALIZED &&
			mRecorder.getRecordingState() == AudioRecord.RECORDSTATE_RECORDING) {
		try {
			mRecorder.stop();
			mRecorder.release();
			setState(State.STOPPED);
		} catch (IllegalStateException e) {
			Log.e(LOG_TAG, "native stop() called in illegal state: " + e.getMessage());
			setState(State.ERROR);
		}
	} else {
		Log.e(LOG_TAG, "stop() called in illegal state");
		setState(State.ERROR);
	}
}
 

/**
 * stop record
 *
 * @throws IOException
 * @throws InterruptedException
 */
public void stopRecord() throws IOException, InterruptedException {
    // specially for OPPO、XIAOMI、MEIZU、HUAWEI and so on
    Thread.sleep(250);
    destroyThread();
    if (mRecorder != null) {
        if (mRecorder.getState() == AudioRecord.STATE_INITIALIZED) {
            mRecorder.stop();
        }
        if (mRecorder != null) {
            mRecorder.release();
        }
    }
    if (dos != null) {
        dos.flush();
        dos.close();
    }
    length = file.length();
    deleteFile();
}
 

public void stopListening() {
    synchronized (API_LOCK) {
        // stops the recording activity
        isListening = false;
        isRecording = false;
        if (recordingThread != null) {
            try {
                recordingThread.join();
            } catch (InterruptedException e) {
                Log.e(TAG, "Failed to join recordingThread", e);
            }
            recordingThread = null;
        }
        if (null != recorder) {
            if (recorder.getState() == AudioRecord.STATE_INITIALIZED) {
                recorder.stop();
            }
            recorder.release();
        }
    }
}
 

public AudioRecord findAudioRecord() {

        for (int rate : mSampleRates) {
            for (short audioFormat : new short[] { AudioFormat.ENCODING_PCM_16BIT }) {
                for (short channelConfig : new short[] { AudioFormat.CHANNEL_IN_MONO }) {
                    try {
                        Log.d("C.TAG", "Attempting rate " + rate + "Hz, bits: " + audioFormat +      ", channel: "
                                + channelConfig);
                        int bufferSize = AudioRecord.getMinBufferSize(rate,      AudioFormat.CHANNEL_IN_MONO , AudioFormat.ENCODING_PCM_16BIT);

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

                            if (recorder.getState() == AudioRecord.STATE_INITIALIZED)
                                return recorder;
                        }
                    } catch (Exception e) {
                        Log.e("C.TAG", rate + "Exception, keep trying.",e);
                    }
                }
            }
        }
        return null;
    }
 

public void start()
{
    if(getState()==AudioRecord.STATE_INITIALIZED)
    {
        startRecording();
        if(getRecordingState()==AudioRecord.RECORDSTATE_RECORDING)
        {
            new Thread() {
                public void run() {
                    recorderLoop();
                }
            }.start();
        }  else {
        Log.e("startRecording()"," failed");
        }
    } else {
        Log.e("start()"," called on illegal state");
    }

}
 

@Override
public void run() {
    byte[] buffer = new byte[audioBufferSize];
    recorder = new AudioRecord(audioSource, sampleRate, channel, audioFormat, audioBufferSize);
    try {
        while (recorder.getState() != AudioRecord.STATE_INITIALIZED)
            Thread.sleep(100, 0);
    } catch (InterruptedException e) {
        recorder.release();
        return;
    }

    recorder.startRecording();
    for (; ; ) {
        int length = recorder.read(buffer, 0, buffer.length);
        if (length < 0)
            Log.e("Record", "error: " + Integer.toString(length));
        else {
            for (WebSocket ws : wss)
                ws.sendBinary(buffer);
        }
        if (Thread.interrupted()) {
            recorder.stop();
            return;
        }
    }
}
 

/**
 * <p>Instantiates a new recorder and sets the state to INITIALIZING.
 * In case of errors, no exception is thrown, but the state is set to ERROR.</p>
 *
 * <p>Android docs say: 44100Hz is currently the only rate that is guaranteed to work on all devices,
 * but other rates such as 22050, 16000, and 11025 may work on some devices.</p>
 *
 * @param audioSource Identifier of the audio source (e.g. microphone)
 * @param sampleRate Sample rate (e.g. 16000)
 */
public RawAudioRecorder(int audioSource, int sampleRate) {
	mSampleRate = sampleRate;
	// E.g. 1 second of 16kHz 16-bit mono audio takes 32000 bytes.
	mOneSec = RESOLUTION_IN_BYTES * CHANNELS * mSampleRate;
	mRecording = new byte[mOneSec * MAX_RECORDING_TIME_IN_SECS];
	try {
		setBufferSizeAndFramePeriod();


		mRecorder = new AudioRecord(audioSource, mSampleRate, AudioFormat.CHANNEL_IN_MONO, RESOLUTION, mBufferSize);
		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
			boolean agcAvailable = AutomaticGainControl.isAvailable();
			if(agcAvailable) {
                   AutomaticGainControl.create(mRecorder.getAudioSessionId());
               }
		}

		if (mRecorder.getState() != AudioRecord.STATE_INITIALIZED) {
			throw new Exception("AudioRecord initialization failed");
		}
		mBuffer = new byte[mFramePeriod * RESOLUTION_IN_BYTES * CHANNELS];
		setState(State.READY);
	} catch (Exception e) {
		release();
		setState(State.ERROR);
		if (e.getMessage() == null) {
			Log.e(LOG_TAG, "Unknown error occured while initializing recording");
		} else {
			Log.e(LOG_TAG, e.getMessage());
		}
	}
}
 

/**
 * Get AudioRecord.
 *
 * @return AudioRecord object instance.
 */
public AudioRecord getAudioRecord() {
    if (mAudioRecord != null && mAudioRecord.getState() == AudioRecord.STATE_INITIALIZED) {
        return mAudioRecord;
    } else {
        return null;
    }
}
 

private void createAudioRecord() throws InitializationException {
    // The AudioRecord configurations parameters used here, are guaranteed
    // to be supported on all devices.

    // AudioFormat.CHANNEL_IN_MONO should be used in place of deprecated
    // AudioFormat.CHANNEL_CONFIGURATION_MONO, but it is not available for
    // API level 3.

    // Unlike AudioTrack buffer, AudioRecord buffer could be larger than
    // minimum without causing any problems. But minimum works well.
    final int audioRecordBufferSizeInBytes = AudioRecord.getMinBufferSize(
            SpeechTrainerConfig.SAMPLE_RATE_HZ, AudioFormat.CHANNEL_CONFIGURATION_MONO,
            AudioFormat.ENCODING_PCM_16BIT);
    if (audioRecordBufferSizeInBytes <= 0) {
        throw new InitializationException("Failed to initialize recording.");
    }

    // CHANNEL_IN_MONO is guaranteed to work on all devices.
    // ENCODING_PCM_16BIT is guaranteed to work on all devices.
    audioRecord = new AudioRecord(AudioSource.MIC, SpeechTrainerConfig.SAMPLE_RATE_HZ,
            AudioFormat.CHANNEL_CONFIGURATION_MONO, AudioFormat.ENCODING_PCM_16BIT,
            audioRecordBufferSizeInBytes);
    if (audioRecord.getState() != AudioRecord.STATE_INITIALIZED) {
        audioRecord = null;
        throw new InitializationException("Failed to initialize recording.");
    }
}
 

/**
 * 查找可用的音頻錄製器
 *
 * @return
 */
private AudioRecord findAudioRecord() {
    int[] samplingRates = new int[]{44100, 22050, 11025, 8000};
    int[] audioFormats = new int[]{
            AudioFormat.ENCODING_PCM_16BIT,
            AudioFormat.ENCODING_PCM_8BIT};
    int[] channelConfigs = new int[]{
            AudioFormat.CHANNEL_IN_STEREO,
            AudioFormat.CHANNEL_IN_MONO};

    for (int rate : samplingRates) {
        for (int format : audioFormats) {
            for (int config : channelConfigs) {
                try {
                    int bufferSize = AudioRecord.getMinBufferSize(rate, config, format);
                    if (bufferSize != AudioRecord.ERROR_BAD_VALUE) {
                        for (int source : AUDIO_SOURCES) {
                            AudioRecord recorder = new AudioRecord(source, rate, config, format, bufferSize * 4);
                            if (recorder.getState() == AudioRecord.STATE_INITIALIZED) {
                                return recorder;
                            }
                        }
                    }
                } catch (Exception e) {
                    Log.e(TAG, "Init AudioRecord Error." + Log.getStackTraceString(e));
                }
            }
        }
    }
    return null;
}
 

/**
 * Initialise the Voice Recorder
 *
 * @return The audio record initialisation state.
 */
public int initialise() {

    int count = 0;

    while (count < 4) {
        count++;

        saiyAudio = new SaiyAudio(audioSource, sampleRateInHz, channelConfig, audioFormat,
                bufferSizeInBytes, enhance);

        if (saiyAudio.getState() == AudioRecord.STATE_INITIALIZED) {
            return AudioRecord.STATE_INITIALIZED;
        } else {
            if (DEBUG) {
                MyLog.w(CLS_NAME, "SaiyAudio reinitialisation attempt ~ " + count);
            }

            if (Looper.myLooper() != null && Looper.myLooper() != Looper.getMainLooper()) {

                // Give the audio object a small chance to sort itself out
                try {
                    Thread.sleep(250);
                } catch (InterruptedException e) {
                    if (DEBUG) {
                        MyLog.w(CLS_NAME, "SaiyAudio InterruptedException");
                        e.printStackTrace();
                    }
                }
            }
        }
    }

    if (DEBUG) {
        MyLog.w(CLS_NAME, "SaiyAudio initialisation failed");
    }

    return AudioRecord.STATE_UNINITIALIZED;
}
 

private boolean initAudioRecord(Context context, int audioSource, int sampleRate, int channelConfig, int chanelNumber, int audioFormat, int nbBitsPerSample, int bufferSize)
{
	witchRecorder = 1;
	isAudioRecordRunning = false;
	
	try
	{
		audioRecordSampleRate = sampleRate;
		int timerInterval = 120;
		audioRecordPeriodInFrames = sampleRate * timerInterval / 1000;
		bufferSize = audioRecordPeriodInFrames * 2 * chanelNumber * nbBitsPerSample / 8;
		
		if(bufferSize < AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat))
		{
			bufferSize = AudioRecord.getMinBufferSize(sampleRate, channelConfig, audioFormat);
			audioRecordPeriodInFrames = bufferSize / ( 2 * nbBitsPerSample * chanelNumber / 8 );
		}
		
		audioRecord = new AudioRecord(audioSource, sampleRate, channelConfig, audioFormat, bufferSize);
		
		if (audioRecord.getState() != AudioRecord.STATE_INITIALIZED)
		{
			Log.w("RecordFileWriter", "initAudioRecord : " + context.getString(R.string.log_record_file_writer_error_audiorecord_init));
			databaseManager.insertLog(context, "" + context.getString(R.string.log_record_file_writer_error_audiorecord_init), new Date().getTime(), 2, false);
			return false;
		}
		
		audioRecord.setRecordPositionUpdateListener(onAudioRecordPositionUpdateListener);
		audioRecord.setPositionNotificationPeriod(audioRecordPeriodInFrames);
	}
	catch (Exception e)
	{
		Log.w("RecordFileWriter", "initAudioRecord : " + context.getString(R.string.log_record_file_writer_error_audiorecord_init) + " : " + e);
		databaseManager.insertLog(context, "" + context.getString(R.string.log_record_file_writer_error_audiorecord_init), new Date().getTime(), 2, false);
		return false;
	}
	
	return true;
}
 

private boolean prepareAudioRecord(Context context, File recordFile, int audioRecordChannelConfig, int chanelNumber, int audioRecordAudioFormat, int nbBitsPerSample)
{
	try
	{
		if (audioRecord.getState() == AudioRecord.STATE_INITIALIZED)
		{
			audioRecordRandomAccessFile = new RandomAccessFile(recordFile.getAbsolutePath(), "rw");
			audioRecordRandomAccessFile.setLength(0);
			audioRecordRandomAccessFile.writeBytes("RIFF"); // 00 - Marks the file as a riff file
			audioRecordRandomAccessFile.writeInt(0); // 04 - Size of the overall file
			audioRecordRandomAccessFile.writeBytes("WAVE"); // 08 - File Type Header
			audioRecordRandomAccessFile.writeBytes("fmt "); // 12 - Format chunk marker
			audioRecordRandomAccessFile.writeInt(Integer.reverseBytes(16)); // 16 - Length of format data as listed above
			audioRecordRandomAccessFile.writeShort(Short.reverseBytes((short) 1)); // 20 - Type of format
			audioRecordRandomAccessFile.writeShort(Short.reverseBytes((short) chanelNumber)); // 22 - Number of Channels
			audioRecordRandomAccessFile.writeInt(Integer.reverseBytes(audioRecordSampleRate)); // 24 - Sample Rate
			audioRecordRandomAccessFile.writeInt(Integer.reverseBytes(audioRecordSampleRate * chanelNumber * (short)nbBitsPerSample / 8)); // 28 - ByteRate
			audioRecordRandomAccessFile.writeShort(Short.reverseBytes((short)(chanelNumber * nbBitsPerSample / 8))); // 32 - Alignment
			audioRecordRandomAccessFile.writeShort(Short.reverseBytes((short) nbBitsPerSample)); // 34 - Bits per sample
			audioRecordRandomAccessFile.writeBytes("data"); // 36 - "data" chunk header
			audioRecordRandomAccessFile.writeInt(0); // 40 - Size of the data section
			audioRecordBuffer = new byte[audioRecordPeriodInFrames * (short)nbBitsPerSample / 8 * chanelNumber];
		}
		else
		{
			Log.w("RecordFileWriter", "prepareAudioRecord : " + context.getString(R.string.log_record_file_writer_error_audiorecord_prepare));
			databaseManager.insertLog(context, "" + context.getString(R.string.log_record_file_writer_error_audiorecord_prepare), new Date().getTime(), 2, false);
			return false;
		}
	}
	catch (Exception e)
	{
		Log.w("RecordFileWriter", "prepareAudioRecord : " + context.getString(R.string.log_record_file_writer_error_audiorecord_prepare) + " : " + e);
		databaseManager.insertLog(context, "" + context.getString(R.string.log_record_file_writer_error_audiorecord_prepare), new Date().getTime(), 2, false);
		return false;
	}
	
	return true;
}