/*****************************************************************************
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* Aout.java
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*****************************************************************************
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* Copyright © 2011-2012 VLC authors and VideoLAN
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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package org.videolan.libvlc;
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import android.media.AudioFormat;
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import android.media.AudioManager;
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import android.media.AudioTrack;
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import android.util.Log;
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public class Aout {
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/**
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* Java side of the audio output module for Android.
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* Uses an AudioTrack to play decoded audio buffers.
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*
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* TODO Use MODE_STATIC instead of MODE_STREAM with a MemoryFile (ashmem)
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*/
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public Aout() {
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}
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private AudioTrack mAudioTrack;
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private static final String TAG = "LibVLC/aout";
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public void init(int sampleRateInHz, int channels, int samples) {
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Log.d(TAG, sampleRateInHz + ", " + channels + ", " + samples + "=>" + channels * samples);
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int minBufferSize = AudioTrack.getMinBufferSize(sampleRateInHz,
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AudioFormat.CHANNEL_OUT_STEREO,
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AudioFormat.ENCODING_PCM_16BIT);
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mAudioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
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sampleRateInHz,
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AudioFormat.CHANNEL_OUT_STEREO,
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AudioFormat.ENCODING_PCM_16BIT,
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Math.max(minBufferSize, channels * samples * 2),
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AudioTrack.MODE_STREAM);
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}
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public void release() {
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if (mAudioTrack != null) {
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mAudioTrack.release();
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}
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mAudioTrack = null;
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}
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public void playBuffer(byte[] audioData, int bufferSize) {
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if (mAudioTrack.getState() == AudioTrack.STATE_UNINITIALIZED)
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return;
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if (mAudioTrack.write(audioData, 0, bufferSize) != bufferSize) {
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Log.w(TAG, "Could not write all the samples to the audio device");
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}
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mAudioTrack.play();
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}
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public void pause() {
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mAudioTrack.pause();
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}
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}
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