Java Code Examples for android.media.AudioTrack#getState()

The following examples show how to use android.media.AudioTrack#getState() . 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: BlockingAudioTrack.java From android_9.0.0_r45 with Apache License 2.0

6 votes

private AudioTrack createStreamingAudioTrack() {
    final int channelConfig = getChannelConfig(mChannelCount);

    int minBufferSizeInBytes
            = AudioTrack.getMinBufferSize(mSampleRateInHz, channelConfig, mAudioFormat);
    int bufferSizeInBytes = Math.max(MIN_AUDIO_BUFFER_SIZE, minBufferSizeInBytes);

    AudioFormat audioFormat = (new AudioFormat.Builder())
            .setChannelMask(channelConfig)
            .setEncoding(mAudioFormat)
            .setSampleRate(mSampleRateInHz).build();
    AudioTrack audioTrack = new AudioTrack(mAudioParams.mAudioAttributes,
            audioFormat, bufferSizeInBytes, AudioTrack.MODE_STREAM,
            mAudioParams.mSessionId);

    if (audioTrack.getState() != AudioTrack.STATE_INITIALIZED) {
        Log.w(TAG, "Unable to create audio track.");
        audioTrack.release();
        return null;
    }

    mAudioBufferSize = bufferSizeInBytes;

    setupVolume(audioTrack, mAudioParams.mVolume, mAudioParams.mPan);
    return audioTrack;
}

Example 2

Source File: AudioPlayer.java From EvilsLive with MIT License

6 votes

public boolean startPlayer(int streamType, int sampleRateInHz, int channelConfig, int audioFormat) {
    
    if (mIsPlayStarted) {
        Log.e(TAG, "Player already started !");
        return false;
    }
    
    mMinBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz,channelConfig,audioFormat);
    if (mMinBufferSize == AudioTrack.ERROR_BAD_VALUE) {
        Log.e(TAG, "Invalid parameter !");
        return false;
    }
    Log.d(TAG , "getMinBufferSize = "+mMinBufferSize+" bytes !");
    
    mAudioTrack = new AudioTrack(streamType,sampleRateInHz,channelConfig,audioFormat,mMinBufferSize,DEFAULT_PLAY_MODE);
    if (mAudioTrack.getState() == AudioTrack.STATE_UNINITIALIZED) {
        Log.e(TAG, "AudioTrack initialize fail !");
        return false;
    }            
    
    mIsPlayStarted = true;
    
    Log.d(TAG, "Start audio player success !");
    
    return true;
}

Example 3

Source File: AudioPlayer.java From Android with Apache License 2.0

6 votes

public boolean startPlayer(int streamType, int sampleRateInHz, int channelConfig, int audioFormat) {
    
    if (mIsPlayStarted) {
        Log.e(TAG, "Player already started !");
        return false;
    }
    
    mMinBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz,channelConfig,audioFormat);
    if (mMinBufferSize == AudioTrack.ERROR_BAD_VALUE) {
        Log.e(TAG, "Invalid parameter !");
        return false;
    }
    Log.d(TAG , "getMinBufferSize = "+mMinBufferSize+" bytes !");
    
    mAudioTrack = new AudioTrack(streamType,sampleRateInHz,channelConfig,audioFormat,mMinBufferSize,DEFAULT_PLAY_MODE);
    if (mAudioTrack.getState() == AudioTrack.STATE_UNINITIALIZED) {
        Log.e(TAG, "AudioTrack initialize fail !");
        return false;
    }            
    
    mIsPlayStarted = true;
    
    Log.d(TAG, "Start audio player success !");
    
    return true;
}

Example 4

Source File: AACHelper.java From CameraV with GNU General Public License v3.0

6 votes

public boolean setPlayer(int rate)
{
    int bufferSizePlayer = AudioTrack.getMinBufferSize(rate, AudioFormat.CHANNEL_OUT_MONO, audioFormat);
    Log.d("====buffer Size player ", String.valueOf(bufferSizePlayer));

    player= new AudioTrack(AudioManager.STREAM_MUSIC, rate, AudioFormat.CHANNEL_OUT_MONO, audioFormat, bufferSizePlayer, AudioTrack.MODE_STREAM);


    if (player.getState() == AudioTrack.STATE_INITIALIZED)
    {

        return true;
    }
    else
    {
        return false;
    }

}

Example 5

Source File: AudioPlayback.java From MediaPlayer-Extended with Apache License 2.0

4 votes

/**
 * Initializes or reinitializes the audio track with the supplied format for playback
 * while keeping the playstate. Keeps the current configuration and skips reinitialization
 * if the new format is the same as the current format.
 */
public void init(MediaFormat format) {
    Log.d(TAG, "init");

    boolean playing = false;

    if(isInitialized()) {
        if(!checkIfReinitializationRequired(format)) {
            // Set new format that equals the old one (in case we compare references somewhere)
            mAudioFormat = format;
            return;
        }

        playing = isPlaying();
        pause();
        stopAndRelease(false);
    } else {
        // deferred creation of the audio thread until its first use
        mAudioThread = new AudioThread();
        mAudioThread.setPaused(true);
        mAudioThread.start();
    }

    mAudioFormat = format;

    int channelCount = format.getInteger(MediaFormat.KEY_CHANNEL_COUNT);
    int bytesPerSample = 2;
    mFrameSize = bytesPerSample * channelCount;
    mSampleRate = format.getInteger(MediaFormat.KEY_SAMPLE_RATE);

    int channelConfig = AudioFormat.CHANNEL_OUT_DEFAULT;
    switch(channelCount) {
        case 1:
            channelConfig = AudioFormat.CHANNEL_OUT_MONO;
            break;
        case 2:
            channelConfig = AudioFormat.CHANNEL_OUT_STEREO;
            break;
        case 4:
            channelConfig = AudioFormat.CHANNEL_OUT_QUAD;
            break;
        case 6:
            channelConfig = AudioFormat.CHANNEL_OUT_5POINT1;
            break;
        case 8:
            channelConfig = AudioFormat.CHANNEL_OUT_7POINT1;
    }

    mPlaybackBufferSize = mFrameChunkSize * channelCount;

    mAudioTrack = new AudioTrack(
            mAudioStreamType,
            mSampleRate,
            channelConfig,
            AudioFormat.ENCODING_PCM_16BIT,
            mPlaybackBufferSize, // at least twice the size to enable double buffering (according to docs)
            AudioTrack.MODE_STREAM, mAudioSessionId);

    if(mAudioTrack.getState() != AudioTrack.STATE_INITIALIZED) {
        stopAndRelease();
        throw new IllegalStateException("audio track init failed");
    }

    mAudioSessionId = mAudioTrack.getAudioSessionId();
    mAudioStreamType = mAudioTrack.getStreamType();
    setStereoVolume(mVolumeLeft, mVolumeRight);
    mPresentationTimeOffsetUs = PTS_NOT_SET;

    if(playing) {
        play();
    }
}