public void dispose() {
if (buffers == null) return;
if (sourceID != -1) {
audio.freeSource(sourceID);
sourceID = -1;
}
audio.getAL().alDeleteBuffers(buffers.limit(), buffers);
buffers = null;
}
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 = Buffers.newDirectIntBuffer(bufferCount);
audio.getAL().alGenBuffers(buffers.limit(), buffers);
if (audio.getAL().alGetError() != ALConstants.AL_NO_ERROR)
throw new GdxRuntimeException("Unabe to allocate audio buffers.");
}
audio.getAL().alSourcei(sourceID, ALConstants.AL_LOOPING, ALConstants.AL_FALSE);
audio.getAL().alSourcef(sourceID, ALConstants.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();
audio
.getAL()
.alBufferData(bufferID, format, tempBuffer, tempBuffer.remaining(), sampleRate);
ib.put(0, bufferID).rewind();
audio.getAL().alSourceQueueBuffers(sourceID, ib.limit(), ib);
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);
audio
.getAL()
.alBufferData(bufferID, format, tempBuffer, tempBuffer.remaining(), sampleRate);
audio.getAL().alSourceQueueBuffers(sourceID, ib.limit(), ib);
}
audio.getAL().alSourcePlay(sourceID);
isPlaying = true;
}
while (length > 0) {
int written = fillBuffer(data, offset, length);
length -= written;
offset += written;
}
}
/** Blocks until some of the data could be buffered. */
private int fillBuffer(byte[] data, int offset, int length) {
int written = Math.min(bufferSize, length);
outer:
while (true) {
audio.getAL().alGetSourcei(sourceID, ALConstants.AL_BUFFERS_PROCESSED, ib);
int buffers = ib.get(0);
while (buffers-- > 0) {
// FIXME
ib.put(0, buffers).rewind();
audio.getAL().alSourceUnqueueBuffers(sourceID, ib.limit(), ib);
int bufferID = ib.get(0);
if (bufferID == ALConstants.AL_INVALID_VALUE) break;
renderedSeconds += secondsPerBuffer;
tempBuffer.clear();
tempBuffer.put(data, offset, written).flip();
audio
.getAL()
.alBufferData(bufferID, format, tempBuffer, tempBuffer.remaining(), sampleRate);
ib.put(0, bufferID).rewind();
audio.getAL().alSourceQueueBuffers(sourceID, ib.limit(), ib);
break outer;
}
// Wait for buffer to be free.
try {
Thread.sleep((long) (1000 * secondsPerBuffer / bufferCount));
} catch (InterruptedException ignored) {
}
}
// A buffer underflow will cause the source to stop.
if (!isPlaying || !isCurrentSourcePlaying()) {
audio.getAL().alSourcePlay(sourceID);
isPlaying = true;
}
return written;
}
public float getPosition() {
if (sourceID == -1) return 0;
audio.getAL().alGetSourcef(sourceID, ALConstants.AL_SEC_OFFSET, fb);
return renderedSeconds + fb.get(0);
}
public void setVolume(float volume) {
this.volume = volume;
if (sourceID != -1) audio.getAL().alSourcef(sourceID, ALConstants.AL_GAIN, volume);
}
private boolean isCurrentSourcePlaying() {
audio.getAL().alGetSourcei(sourceID, ALConstants.AL_SOURCE_STATE, ib);
return (ib.get(0) == ALConstants.AL_PLAYING);
}