void OnAudioFilterRead(float[] samples, int channelCount)
{
lock (this)
{
int coeffCount = Ambisonic.GetCoeffCount(_order);
if (_sink != null && coeffCount > 0)
{
int samplesOffset = 0;
// While there are sample to process
while (samplesOffset < samples.Length)
{
// If the pending buffer is full, move it to the full ist
if (_activeSamples != null && _activeSamples.Length == _activeSampleIndex)
{
_fullBuffers.Enqueue(_activeSamples);
_activeSamples = null;
_activeSampleIndex = 0;
}
// Assign a new pending queue
if (_activeSamples == null && _emptyBuffers.Count > 0)
{
_activeSamples = _emptyBuffers.Dequeue();
}
if (_activeSamples == null)
{
// Remaining samples are lost!
break;
}
int remainingFrameCount = (samples.Length - samplesOffset) / channelCount;
int generatedSampleCount = remainingFrameCount * coeffCount;
int remainingSampleSpace = (_activeSamples.Length - _activeSampleIndex);
int samplesToProcess = Mathf.Min(remainingSampleSpace, generatedSampleCount);
// TODO: should we specify Floor/Ceil rounding behaviour?
int framesToProcess = samplesToProcess / coeffCount;
generatedSampleCount = framesToProcess * coeffCount;
if (framesToProcess > 0)
{
NativePlugin.EncodeMonoToAmbisonic(_sourceInstance, samples, samplesOffset, framesToProcess, channelCount, _activeSamples, _activeSampleIndex, _activeSamples.Length, _order);
_activeSampleIndex += generatedSampleCount;
samplesOffset += framesToProcess * channelCount;
}
else
{
Debug.Log(coeffCount + " " + framesToProcess + " " + remainingSampleSpace + " >> " + samplesOffset + " / " + samples.Length);
break;
}
}
}
}
}