/** This function processes all the change requests to remove all the the
redundant ones, and to tell what kind of initialization must be done.
Depending on the results, the convolution engines might be reset, or
simply updated, or they might not need any change at all.
*/
void processFifo()
{
if (getNumRemainingEntries() == 0 || isThreadRunning() || mustInterpolate)
return;
// retrieve the information from the FIFO for processing
Array<ChangeRequest> requests;
Array<juce::var> requestParameters;
while (getNumRemainingEntries() > 0)
{
ChangeRequest type = ChangeRequest::changeEngine;
juce::var parameter;
readFromFifo (type, parameter);
requests.add (type);
requestParameters.add (parameter);
}
// remove any useless messages
for (int i = 0; i < (int) ChangeRequest::numChangeRequestTypes; ++i)
{
bool exists = false;
for (int n = requests.size(); --n >= 0;)
{
if (requests[n] == (ChangeRequest) i)
{
if (! exists)
{
exists = true;
}
else
{
requests.remove (n);
requestParameters.remove (n);
}
}
}
}
changeLevel = 0;
for (int n = 0; n < requests.size(); ++n)
{
switch (requests[n])
{
case ChangeRequest::changeEngine:
changeLevel = 3;
break;
case ChangeRequest::changeSampleRate:
{
double newSampleRate = requestParameters[n];
if (currentInfo.sampleRate != newSampleRate)
changeLevel = 3;
currentInfo.sampleRate = newSampleRate;
}
break;
case ChangeRequest::changeMaximumBufferSize:
{
int newMaximumBufferSize = requestParameters[n];
if (currentInfo.maximumBufferSize != (size_t) newMaximumBufferSize)
changeLevel = 3;
currentInfo.maximumBufferSize = (size_t) newMaximumBufferSize;
}
break;
case ChangeRequest::changeSource:
{
auto* arrayParameters = requestParameters[n].getArray();
auto newSourceType = static_cast<SourceType> (static_cast<int> (arrayParameters->getUnchecked (0)));
if (currentInfo.sourceType != newSourceType)
changeLevel = jmax (2, changeLevel);
if (newSourceType == SourceType::sourceBinaryData)
{
auto& prm = arrayParameters->getRawDataPointer()[1];
auto* newMemoryBlock = prm.getBinaryData();
auto* newPtr = newMemoryBlock->getData();
auto newSize = newMemoryBlock->getSize();
if (currentInfo.sourceData != newPtr || currentInfo.sourceDataSize != newSize)
changeLevel = jmax (2, changeLevel);
currentInfo.sourceType = SourceType::sourceBinaryData;
currentInfo.sourceData = newPtr;
currentInfo.sourceDataSize = newSize;
currentInfo.fileImpulseResponse = File();
}
else if (newSourceType == SourceType::sourceAudioFile)
{
File newFile (arrayParameters->getUnchecked (1).toString());
if (currentInfo.fileImpulseResponse != newFile)
changeLevel = jmax (2, changeLevel);
currentInfo.sourceType = SourceType::sourceAudioFile;
currentInfo.fileImpulseResponse = newFile;
currentInfo.sourceData = nullptr;
currentInfo.sourceDataSize = 0;
}
else if (newSourceType == SourceType::sourceAudioBuffer)
{
double bufferSampleRate (arrayParameters->getUnchecked (1));
changeLevel = jmax (2, changeLevel);
currentInfo.sourceType = SourceType::sourceAudioBuffer;
currentInfo.bufferSampleRate = bufferSampleRate;
currentInfo.fileImpulseResponse = File();
currentInfo.sourceData = nullptr;
currentInfo.sourceDataSize = 0;
}
}
break;
case ChangeRequest::changeImpulseResponseSize:
{
int64 newSize = requestParameters[n];
if (currentInfo.impulseResponseSize != (size_t) newSize)
changeLevel = jmax (1, changeLevel);
currentInfo.impulseResponseSize = (size_t) newSize;
}
break;
case ChangeRequest::changeStereo:
{
bool newWantsStereo = requestParameters[n];
if (currentInfo.wantsStereo != newWantsStereo)
changeLevel = jmax (1, changeLevel);
currentInfo.wantsStereo = newWantsStereo;
}
break;
case ChangeRequest::changeTrimming:
{
bool newWantsTrimming = requestParameters[n];
if (currentInfo.wantsTrimming != newWantsTrimming)
changeLevel = jmax(1, changeLevel);
currentInfo.wantsTrimming = newWantsTrimming;
}
break;
default:
jassertfalse;
break;
}
}
if (currentInfo.sourceType == SourceType::sourceNone)
{
currentInfo.sourceType = SourceType::sourceAudioBuffer;
if (currentInfo.sampleRate == 0)
currentInfo.sampleRate = 44100;
if (currentInfo.maximumBufferSize == 0)
currentInfo.maximumBufferSize = 128;
currentInfo.bufferSampleRate = currentInfo.sampleRate;
currentInfo.impulseResponseSize = 1;
currentInfo.fileImpulseResponse = File();
currentInfo.sourceData = nullptr;
currentInfo.sourceDataSize = 0;
AudioBuffer<float> newBuffer;
newBuffer.setSize (1, 1);
newBuffer.setSample (0, 0, 1.f);
copyBufferToTemporaryLocation (newBuffer);
}
// action depending on the change level
if (changeLevel == 3)
{
interpolationBuffer.setSize (2, static_cast<int> (currentInfo.maximumBufferSize));
processImpulseResponse();
initializeConvolutionEngines();
}
else if (changeLevel == 2)
{
startThread();
}
else if (changeLevel == 1)
{
startThread();
}
}
