void Synthesiser::processNextBlock (AudioBuffer<floatType>& outputAudio,
const MidiBuffer& midiData,
int startSample,
int numSamples)
{
// must set the sample rate before using this!
jassert (sampleRate != 0);
const int targetChannels = outputAudio.getNumChannels();
MidiBuffer::Iterator midiIterator (midiData);
midiIterator.setNextSamplePosition (startSample);
bool firstEvent = true;
int midiEventPos;
MidiMessage m;
const ScopedLock sl (lock);
while (numSamples > 0)
{
if (! midiIterator.getNextEvent (m, midiEventPos))
{
if (targetChannels > 0)
renderVoices (outputAudio, startSample, numSamples);
return;
}
const int samplesToNextMidiMessage = midiEventPos - startSample;
if (samplesToNextMidiMessage >= numSamples)
{
if (targetChannels > 0)
renderVoices (outputAudio, startSample, numSamples);
handleMidiEvent (m);
break;
}
if (samplesToNextMidiMessage < ((firstEvent && ! subBlockSubdivisionIsStrict) ? 1 : minimumSubBlockSize))
{
handleMidiEvent (m);
continue;
}
firstEvent = false;
if (targetChannels > 0)
renderVoices (outputAudio, startSample, samplesToNextMidiMessage);
handleMidiEvent (m);
startSample += samplesToNextMidiMessage;
numSamples -= samplesToNextMidiMessage;
}
while (midiIterator.getNextEvent (m, midiEventPos))
handleMidiEvent (m);
}
void MPESynthesiserBase::renderNextBlock (AudioBuffer<floatType>& outputAudio,
const MidiBuffer& inputMidi,
int startSample,
int numSamples)
{
// you must set the sample rate before using this!
jassert (sampleRate != 0);
MidiBuffer::Iterator midiIterator (inputMidi);
midiIterator.setNextSamplePosition (startSample);
bool firstEvent = true;
int midiEventPos;
MidiMessage m;
const ScopedLock sl (noteStateLock);
while (numSamples > 0)
{
if (! midiIterator.getNextEvent (m, midiEventPos))
{
renderNextSubBlock (outputAudio, startSample, numSamples);
return;
}
const int samplesToNextMidiMessage = midiEventPos - startSample;
if (samplesToNextMidiMessage >= numSamples)
{
renderNextSubBlock (outputAudio, startSample, numSamples);
handleMidiEvent (m);
break;
}
if (samplesToNextMidiMessage < ((firstEvent && ! subBlockSubdivisionIsStrict) ? 1 : minimumSubBlockSize))
{
handleMidiEvent (m);
continue;
}
firstEvent = false;
renderNextSubBlock (outputAudio, startSample, samplesToNextMidiMessage);
handleMidiEvent (m);
startSample += samplesToNextMidiMessage;
numSamples -= samplesToNextMidiMessage;
}
while (midiIterator.getNextEvent (m, midiEventPos))
handleMidiEvent (m);
}
void Synthesiser::renderNextBlock (AudioSampleBuffer& outputBuffer, const MidiBuffer& midiData,
int startSample, int numSamples)
{
// must set the sample rate before using this!
jassert (sampleRate != 0);
const ScopedLock sl (lock);
MidiBuffer::Iterator midiIterator (midiData);
midiIterator.setNextSamplePosition (startSample);
MidiMessage m (0xf4, 0.0);
while (numSamples > 0)
{
int midiEventPos;
const bool useEvent = midiIterator.getNextEvent (m, midiEventPos)
&& midiEventPos < startSample + numSamples;
const int numThisTime = useEvent ? midiEventPos - startSample
: numSamples;
if (numThisTime > 0)
renderVoices (outputBuffer, startSample, numThisTime);
if (useEvent)
handleMidiEvent (m);
startSample += numThisTime;
numSamples -= numThisTime;
}
}
void Synthesiser::renderNextBlock (AudioSampleBuffer& outputBuffer, const MidiBuffer& midiData,
int startSample, int numSamples)
{
// must set the sample rate before using this!
jassert (sampleRate != 0);
MidiBuffer::Iterator midiIterator (midiData);
midiIterator.setNextSamplePosition (startSample);
int midiEventPos;
MidiMessage m;
const ScopedLock sl (lock);
while (numSamples > 0)
{
if (! midiIterator.getNextEvent (m, midiEventPos))
{
renderVoices (outputBuffer, startSample, numSamples);
return;
}
const int samplesToNextMidiMessage = midiEventPos - startSample;
if (samplesToNextMidiMessage >= numSamples)
{
renderVoices (outputBuffer, startSample, numSamples);
handleMidiEvent (m);
break;
}
if (samplesToNextMidiMessage < minimumSubBlockSize)
{
handleMidiEvent (m);
continue;
}
renderVoices (outputBuffer, startSample, samplesToNextMidiMessage);
handleMidiEvent (m);
startSample += samplesToNextMidiMessage;
numSamples -= samplesToNextMidiMessage;
}
while (midiIterator.getNextEvent (m, midiEventPos))
handleMidiEvent (m);
}
DSP_EXPORT void processBlock(BlockData& data)
{
// smooth gain update: use begin and end values
// since the actual gain is exponential, we can use the ratio between begin and end values
// as an incremental multiplier for the actual gain
double gainDiff=data.endParamValues[kGainParam]-data.beginParamValues[kGainParam];
double gainRatio=1;
if(gainDiff!=0)
gainRatio=pow(10,gainDiff/double(data.samplesToProcess)*2);
uint nextEventIndex=0;
for(uint i=0;i<data.samplesToProcess;i++)
{
// manage MIDI events
while(nextEventIndex!=data.inputMidiEvents.length && data.inputMidiEvents[nextEventIndex].timeStamp<=double(i))
{
handleMidiEvent(data.inputMidiEvents[nextEventIndex]);
nextEventIndex++;
}
// compute sample value
double sampleValue=0;
for(uint v=0;v<activeVoicesCount;v++)
{
sampleValue+=voices[v].ProcessSample();
}
sampleValue*=gain;
// copy value to all outputs
for(uint ch=0;ch<audioOutputsCount;ch++)
{
data.samples[ch][i]=sampleValue;
}
// update the gain
gain*=gainRatio;
}
// to avoid overflow, reduce phase for all active voices
for(uint i=0;i<activeVoicesCount;i++)
{
voices[i].ReducePhase();
}
}
void ZynAddSubFxInstrument::sendControlChange( MidiControllers midiCtl, float value )
{
handleMidiEvent( MidiEvent( MidiControlChange, instrumentTrack()->midiPort()->realOutputChannel(), midiCtl, (int) value, this ) );
}
