public long play(float volume) {
if (audio.noDevice) return 0;
int sourceID = audio.obtainSource(false);
if (sourceID == -1) {
// Attempt to recover by stopping the least recently played sound
audio.retain(this, true);
sourceID = audio.obtainSource(false);
} else audio.retain(this, false);
// In case it still didn't work
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;
}
@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 writeSamples(byte[] data, int offset, int length) {
if (length < 0) throw new IllegalArgumentException("length cannot be < 0.");
if (sourceID == -1) {
sourceID = audio.obtainSource(true);
if (sourceID == -1) return;
if (buffers == null) {
buffers = BufferUtils.createIntBuffer(bufferCount);
alGenBuffers(buffers);
if (alGetError() != AL_NO_ERROR)
throw new GdxRuntimeException("Unabe to allocate audio buffers.");
}
alSourcei(sourceID, AL_LOOPING, AL_FALSE);
alSourcef(sourceID, AL_GAIN, volume);
// Fill initial buffers.
int queuedBuffers = 0;
for (int i = 0; i < bufferCount; i++) {
int bufferID = buffers.get(i);
int written = Math.min(bufferSize, length);
tempBuffer.clear();
tempBuffer.put(data, offset, written).flip();
alBufferData(bufferID, format, tempBuffer, sampleRate);
alSourceQueueBuffers(sourceID, bufferID);
length -= written;
offset += written;
queuedBuffers++;
}
// Queue rest of buffers, empty.
tempBuffer.clear().flip();
for (int i = queuedBuffers; i < bufferCount; i++) {
int bufferID = buffers.get(i);
alBufferData(bufferID, format, tempBuffer, sampleRate);
alSourceQueueBuffers(sourceID, bufferID);
}
alSourcePlay(sourceID);
isPlaying = true;
}
while (length > 0) {
int written = fillBuffer(data, offset, length);
length -= written;
offset += written;
}
}