void OnAudioFilterRead(float [] data, int numChannels)
{
#if GAT_DEBUG
if (_FiltersHandler.NbOfFilteredChannels != numChannels)
{
Debug.LogError("This player was setup for " + GATInfo.NbOfChannels + " channels output, current is " + numChannels + ". Disabling player.");
_shouldDisable = true;
return;
}
#endif
BufferedSample sample;
bool shouldRemove;
int i;
int dataLength;
bool noData = false;
dataLength = data.Length;
//*********************************************************************************************
//First, we check if any samples in the scheduled queue need to be moved to the playing queue
shouldRemove = false;
sample = _scheduledSamples.head.next; // caching the first item of the linked queue: thread safe iteration
if (sample != null)
{
double nextBufferDSPTime = AudioSettings.dspTime + GATInfo.AudioBufferDuration;
while (sample != null)
{
if (nextBufferDSPTime > sample.scheduledDspTime) //flag samples which need to be moved
{
sample.shouldBeRemoved = true;
shouldRemove = true;
sample.OffsetInBuffer = ( int )((sample.scheduledDspTime - AudioSettings.dspTime) * GATInfo.OutputSampleRate);
}
sample = sample.next;
}
if (shouldRemove) //move to playing queue
{
lock ( _scheduledSamples ) // make sure no sample is added from the main thread whilst removing
{
_scheduledSamples.TrimAndKeepDiscarded(_discardedSamples);
}
_playingSamples.Enqueue(_discardedSamples); // no need to lock on the playing queue: it is only accessed by the audio thread
}
}
//*************************************************************************
//Second, we check the PlayImmediate queue
lock ( _samplesToEnqueue ) //make sure no play immediate sample gets added by the main thread whilst we concatenate the 2 queues
{
if (_samplesToEnqueue.head.next != null)
{
_playingSamples.Enqueue(_samplesToEnqueue);
_samplesToEnqueue.Clear();
}
}
//***********************************************************
//Third, we mix the samples of the Playing queue
sample = _playingSamples.head.next;
if (onPlayerWillMix != null)
{
onPlayerWillMix();
}
//Even if there is no samples to play, filters might add to the mix:
if (sample == null)
{
noData = true;
//Check tracks
for (i = 0; i < _tracks.Count; i++)
{
if (ReferenceEquals(_tracks[i], null) == false)
{
if (_tracks[i].FXAndMixTo(data))
{
noData = false;
}
}
}
//Check Master Filters
if (_FiltersHandler.HasFilters)
{
if (_FiltersHandler.ApplyFilters(data, 0, dataLength, noData))
{
noData = false;
}
}
//Broadcast stream
_audioThreadStreamProxy.BroadcastStream(data, 0, noData);
//Stop there.
if (onPlayerDidMix != null)
{
onPlayerDidMix();
}
return;
}
shouldRemove = false;
while (sample != null)
{
if (sample.MixNow(data) == true)
{
shouldRemove = true;
}
sample = sample.next;
}
//****************************************************
//Then, we remove samples which ended and clip the mix if needed
if (shouldRemove)
{
_playingSamples.TrimAndReleaseDiscarded();
}
//****************************************************
//Now, we check and mix tracks
for (i = 0; i < _tracks.Count; i++)
{
if (ReferenceEquals(_tracks[i], null) == false)
{
_tracks[i].FXAndMixTo(data);
}
}
//Filter the mix, includes a default gain filter which will clip if set so
if (_FiltersHandler.HasFilters)
{
_FiltersHandler.ApplyFilters(data, 0, dataLength, false);
}
//****************************************************
//Finally, we fire the last callback
_audioThreadStreamProxy.BroadcastStream(data, 0, false);
if (onPlayerDidMix != null)
{
onPlayerDidMix();
}
if (_releasePlaying)
{
_playingSamples.ReleaseAllAndPool(this);
_releasePlaying = false;
float deltaGain = 1f / (data.Length / numChannels);
float gain = 1f;
for (i = 0; i < data.Length; i += numChannels)
{
data[i] *= gain;
data[i + 1] *= gain;
gain -= deltaGain;
}
}
}
// Called by GATPlayer.
// Applies effects, and pan-mixes
// to the audio buffer.
public bool FXAndMixTo(float[] audioBuffer)
{
if (!_active)
{
return(false);
}
int i;
bool isEmptyData = false;
if (_hasData == false) //no sample overwrote the buffer, let's clear it
{
if (_bufferIsDirty)
{
_trackBuffer.Clear();
_bufferIsDirty = false;
}
isEmptyData = true;
}
if (_contributor != null)
{
isEmptyData = !(_contributor.MixToTrack(_trackBuffer, _trackNb));
}
if (_filtersHandler.HasFilters)
{
if (_filtersHandler.ApplyFilters(_trackBuffer.ParentArray, _trackBuffer.MemOffset, GATInfo.AudioBufferSizePerChannel, isEmptyData))
{
isEmptyData = false;
}
}
if (isEmptyData)
{
_audioThreadStreamProxy.BroadcastStream(_trackBuffer.ParentArray, _trackBuffer.MemOffset, isEmptyData);
return(false);
}
if (_shouldToggleMute)
{
if (_nextMute)
{
_trackBuffer.FadeOut(GATInfo.AudioBufferSizePerChannel);
}
else
{
_trackBuffer.FadeIn(GATInfo.AudioBufferSizePerChannel);
_mute = false;
}
_shouldToggleMute = false;
}
_bufferIsDirty = true;
_audioThreadStreamProxy.BroadcastStream(_trackBuffer.ParentArray, _trackBuffer.MemOffset, false);
if (_mute)
{
return(false);
}
GATDynamicChannelGain channelGain;
for (i = 0; i < _panInfo.channelGains.Count; i++)
{
channelGain = _panInfo.channelGains[i];
if (channelGain.ShouldInterpolate)
{
_trackBuffer.SmoothedGainMixToInterlaced(audioBuffer, 0, 0, GATInfo.AudioBufferSizePerChannel, channelGain);
continue;
}
if (channelGain.Gain != 0f)
{
_trackBuffer.GainMixToInterlaced(audioBuffer, 0, 0, GATInfo.AudioBufferSizePerChannel, channelGain);
}
}
if (_nextMute) //only set mute here to allow for mixing of faded data : elegant stop
{
_mute = true;
}
return(!isEmptyData);
}