Java AudioRecord.getState方法代碼示例

import android.media.AudioRecord; //導入方法依賴的package包/類
/**
 * 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;
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
private void startRecording(){
    recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
            RECORDER_SAMPLERATE, RECORDER_CHANNELS,RECORDER_AUDIO_ENCODING, bufferSize);

    int i = recorder.getState();
    if(i==1)
        recorder.startRecording();

    isRecording = true;

    recordingThread = new Thread(new Runnable() {

        @Override
        public void run() {
            writeAudioDataToArrayList();
            reorganiseDataArray(flattenArray());
        }
    },"AudioRecorder Thread");

    recordingThread.start();
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
public RecognizerThread(int timeout) {
    if (timeout != NO_TIMEOUT) {
        this.timeoutSamples = timeout * sampleRate / 1000;
    } else {
        this.timeoutSamples = NO_TIMEOUT;
    }
    this.remainingSamples = this.timeoutSamples;
    recorder = new AudioRecord(6, sampleRate, 16, 2, bufferSize * 2);
    if (recorder.getState() == AudioRecord.STATE_UNINITIALIZED) {
        recorder.release();
        try {
            throw new IOException(
                    "Failed to initialize recorder. Microphone might be already in use.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
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;
    }
 

import android.media.AudioRecord; //導入方法依賴的package包/類
private void startRecording(final String filename) {
    recorder = new AudioRecord(MediaRecorder.AudioSource.MIC,
            RECORDER_SAMPLERATE,
            RECORDER_CHANNELS,
            RECORDER_AUDIO_ENCODING,
            bufferSize);
    int i = recorder.getState();
    if (i==1)
        recorder.startRecording();

    isRecording = true;

    recordingThread = new Thread(new Runnable() {
        @Override
        public void run() {
            writeAudioDataToFile(filename);
        }
    }, "AudioRecorder Thread");

    recordingThread.start();
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
@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;
        }
    }
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
/**
 * <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());
		}
	}
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
public boolean startCapture(int audioSource, int sampleRateInHz, int channelConfig, int audioFormat) {
    if (mIsCaptureStarted) {
        Log.e(TAG, "Capture already started !");
        return false;
    }

    int minBufferSize = AudioRecord.getMinBufferSize(sampleRateInHz, channelConfig, audioFormat);
    if (minBufferSize == AudioRecord.ERROR_BAD_VALUE) {
        Log.e(TAG, "Invalid parameter !");
        return false;
    }

    mAudioRecord = new AudioRecord(audioSource, sampleRateInHz, channelConfig, audioFormat, minBufferSize * 4);
    if (mAudioRecord.getState() == AudioRecord.STATE_UNINITIALIZED) {
        Log.e(TAG, "AudioRecord initialize fail !");
        return false;
    }

    mAudioRecord.startRecording();

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

    mIsCaptureStarted = true;

    Log.d(TAG, "Start audio capture success !");

    return true;
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
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.");
    }
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
/**
 * 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;
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
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;
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
/**
 * 
 * 
 * Default constructor
 * 
 * Instantiates a new recorder, in case of compressed recording the
 * parameters can be left as 0. In case of errors, no exception is thrown,
 * but the state is set to ERROR
 * 
 */
@SuppressWarnings("deprecation")
public ExtAudioRecorder(boolean uncompressed, int audioSource,
		int sampleRate, int channelConfig, int audioFormat) {
	try {
		rUncompressed = uncompressed;
		if (rUncompressed) { // RECORDING_UNCOMPRESSED
			if (audioFormat == AudioFormat.ENCODING_PCM_16BIT) {
				bSamples = 16;
			} else {
				bSamples = 8;
			}

			if (channelConfig == AudioFormat.CHANNEL_CONFIGURATION_MONO) {
				nChannels = 1;
			} else {
				nChannels = 2;
			}

			aSource = audioSource;
			sRate = sampleRate;
			aFormat = audioFormat;

			framePeriod = sampleRate * TIMER_INTERVAL / 1000;
			bufferSize = framePeriod * 2 * bSamples * nChannels / 8;
			if (bufferSize < AudioRecord.getMinBufferSize(sampleRate,
					channelConfig, audioFormat)) { // Check to make sure
													// buffer size is not
													// smaller than the
													// smallest allowed one
				bufferSize = AudioRecord.getMinBufferSize(sampleRate,
						channelConfig, audioFormat);
				// Set frame period and timer interval accordingly
				framePeriod = bufferSize / (2 * bSamples * nChannels / 8);
				Log.w(ExtAudioRecorder.class.getName(),
						"Increasing buffer size to "
								+ Integer.toString(bufferSize));
			}

			audioRecorder = new AudioRecord(audioSource, sampleRate,
					channelConfig, audioFormat, bufferSize);

			if (audioRecorder.getState() != AudioRecord.STATE_INITIALIZED)
				throw new Exception("AudioRecord initialization failed");
			audioRecorder.setRecordPositionUpdateListener(updateListener);
			audioRecorder.setPositionNotificationPeriod(framePeriod);
		} else { // RECORDING_COMPRESSED
			mediaRecorder = new MediaRecorder();
			mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);
			mediaRecorder
					.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);
			mediaRecorder
					.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);
		}
		cAmplitude = 0;
		filePath = null;
		state = State.INITIALIZING;
	} catch (Exception e) {
		if (e.getMessage() != null) {
			Log.e(ExtAudioRecorder.class.getName(), e.getMessage());
		} else {
			Log.e(ExtAudioRecorder.class.getName(),
					"Unknown error occured while initializing recording");
		}
		state = State.ERROR;
	}
}
 

import android.media.AudioRecord; //導入方法依賴的package包/類
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;

    }