/*******************************************************************************
* Copyright 2011 See AUTHORS file.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
******************************************************************************/
package com.badlogic.gdx.backends.openal;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import com.badlogic.gdx.audio.Sound;
import static org.lwjgl.openal.AL10.*;
/** @author Nathan Sweet */
public class OpenALSound implements Sound {
private int bufferID = -1;
private final OpenALAudio audio;
private float duration;
public OpenALSound (OpenALAudio audio) {
this.audio = audio;
}
void setup (byte[] pcm, int channels, int sampleRate) {
int bytes = pcm.length - (pcm.length % (channels > 1 ? 4 : 2));
int samples = bytes / (2 * channels);
duration = samples / (float)sampleRate;
ByteBuffer buffer = ByteBuffer.allocateDirect(bytes);
buffer.order(ByteOrder.nativeOrder());
buffer.put(pcm, 0, bytes);
buffer.flip();
if (bufferID == -1) {
bufferID = alGenBuffers();
alBufferData(bufferID, channels > 1 ? AL_FORMAT_STEREO16 : AL_FORMAT_MONO16, buffer.asShortBuffer(), sampleRate);
}
}
public long play () {
return play(1);
}
public long play (float volume) {
if (audio.noDevice) return 0;
int sourceID = audio.obtainSource(false);
if (sourceID == -1) return -1;
long soundId = audio.getSoundId(sourceID);
alSourcei(sourceID, AL_BUFFER, bufferID);
alSourcei(sourceID, AL_LOOPING, AL_FALSE);
alSourcef(sourceID, AL_GAIN, volume);
alSourcePlay(sourceID);
return soundId;
}
public long loop () {
return loop(1);
}
@Override
public long loop (float volume) {
if (audio.noDevice) return 0;
int sourceID = audio.obtainSource(false);
if (sourceID == -1) return -1;
long soundId = audio.getSoundId(sourceID);
alSourcei(sourceID, AL_BUFFER, bufferID);
alSourcei(sourceID, AL_LOOPING, AL_TRUE);
alSourcef(sourceID, AL_GAIN, volume);
alSourcePlay(sourceID);
return soundId;
}
public void stop () {
if (audio.noDevice) return;
audio.stopSourcesWithBuffer(bufferID);
}
public void dispose () {
if (audio.noDevice) return;
if (bufferID == -1) return;
audio.freeBuffer(bufferID);
alDeleteBuffers(bufferID);
bufferID = -1;
}
@Override
public void stop (long soundId) {
if (audio.noDevice) return;
audio.stopSound(soundId);
}
@Override
public void pause () {
if (audio.noDevice) return;
audio.pauseSourcesWithBuffer(bufferID);
}
@Override
public void pause (long soundId) {
if (audio.noDevice) return;
audio.pauseSound(soundId);
}
@Override
public void resume () {
if (audio.noDevice) return;
audio.resumeSourcesWithBuffer(bufferID);
}
@Override
public void resume (long soundId) {
if (audio.noDevice) return;
audio.resumeSound(soundId);
}
@Override
public void setPitch (long soundId, float pitch) {
if (audio.noDevice) return;
audio.setSoundPitch(soundId, pitch);
}
@Override
public void setVolume (long soundId, float volume) {
if (audio.noDevice) return;
audio.setSoundGain(soundId, volume);
}
@Override
public void setLooping (long soundId, boolean looping) {
if (audio.noDevice) return;
audio.setSoundLooping(soundId, looping);
}
@Override
public void setPan (long soundId, float pan, float volume) {
if (audio.noDevice) return;
audio.setSoundPan(soundId, pan, volume);
}
@Override
public long play (float volume, float pitch, float pan) {
long id = play();
setPitch(id, pitch);
setPan(id, pan, volume);
return id;
}
@Override
public long loop (float volume, float pitch, float pan) {
long id = loop();
setPitch(id, pitch);
setPan(id, pan, volume);
return id;
}
/** Returns the length of the sound in seconds. */
public float duration () {
return duration;
}
@Override
public void setPriority (long soundId, int priority) {
// TODO Auto-generated method stub
}
}