void VAOscillator::fillBufferTriangle(AudioBuffer<float>& buffer, AudioBuffer<float>& phaseModBuffer, AudioBuffer<float>& volumeModBuffer, AudioBuffer<float>& pitchModBuffer)
{
if(isActive)
{
float* const data = buffer.getWritePointer(0);
float const *phaseMod = phaseModBuffer.getReadPointer(0);
float const *volMod = volumeModBuffer.getReadPointer(0);
float const *pitchMod = pitchModBuffer.getReadPointer(0);
for(int sampleIndex = 0; sampleIndex < buffer.getNumSamples(); sampleIndex++)
{
double phase = currentPhase + phaseModAmp * phaseMod[sampleIndex];
while (phase < 0)
{
phase += 2 * double_Pi;
}
while (phase > 2 * double_Pi)
{
phase -= 2 * double_Pi;
}
currentPhase += 2 * double_Pi * ((currentFrequency * (pitchMod[sampleIndex] + 2.0))/currentSampleRate);
if(currentPhase > 2 * double_Pi)
{
currentPhase -= 2 * double_Pi;
}
if(phase < double_Pi)
{
data[sampleIndex] = (float)((2 * phase)/double_Pi - 1);
}
else
{
data[sampleIndex] = (float)((3 - 2 * phase/double_Pi));
}
//the 0.000026 is kind of a magic number i didnt calculate it just found it by trying out
data[sampleIndex] += (float)(0.000026 * currentFrequency * getTriRes(phase, currentFrequency));
if(phase < double_Pi)
{
data[sampleIndex] -= (float)(0.000026 * currentFrequency * getTriRes(phase + double_Pi, currentFrequency));
}
else if(phase >= double_Pi)
{
data[sampleIndex] -= (float)(0.000026 * currentFrequency * getTriRes(phase - double_Pi, currentFrequency));
}
data[sampleIndex] *= (float)std::abs(0.5 * (volMod[sampleIndex] + 1));
}
}
else
{
buffer.clear();
}
}// end triangle
void NoiseOscillator::fillBufferNoise(AudioBuffer<float> &buffer)
{
float* const data = buffer.getWritePointer(0);
for(int sampleIndex = 0; sampleIndex < buffer.getNumSamples(); sampleIndex++)
{
data[sampleIndex] = (2 * rand.nextFloat()) - 1;
}
}
void VAOscillator::fillBufferSine(AudioBuffer<float>& buffer, AudioBuffer<float>& phaseModBuffer, AudioBuffer<float>& volumeModBuffer, AudioBuffer<float>& pitchModBuffer, Array<int>& midiOns)// add midi buffer and know channel with control Voltage
{
if(isActive)
{
float* const data = buffer.getWritePointer(0);
float const *phaseMod = phaseModBuffer.getReadPointer(0);
float const *volMod = volumeModBuffer.getReadPointer(0);
float const *pitchMod = pitchModBuffer.getReadPointer(0);
for(int sampleIndex = 0; sampleIndex < buffer.getNumSamples(); sampleIndex++)
{
//check if this is the best i can do
if(midiOns.size() != 0)
{
if(sampleIndex == midiOns[0])
{
resetPhase();
midiOns.remove(0);
}
}
double phase = currentPhase + phaseModAmp * phaseMod[sampleIndex] + currentPhaseOffset;
while (phase < 0)
{
phase += 2 * double_Pi;
}
while (phase > 2 * double_Pi)
{
phase -= 2 * double_Pi;
}
data[sampleIndex] = static_cast<float>(sin(phase) * std::abs(0.5 * (volMod[sampleIndex] + 1)));
currentPhase += 2 * double_Pi * ((currentFrequency * (pitchMod[sampleIndex] + 2.0))/currentSampleRate);
if(currentPhase > 2 * double_Pi)
{
currentPhase -= 2 * double_Pi;
}
}
}
else
{
buffer.clear();
}
}// end sine
void VAOscillator::fillBufferFallingSaw(AudioBuffer<float>& buffer, AudioBuffer<float>& phaseModBuffer, AudioBuffer<float>& volumeModBuffer, AudioBuffer<float>& pitchModBuffer)
{
if(isActive)
{
fillBufferRisingSaw(buffer, phaseModBuffer, volumeModBuffer, pitchModBuffer);
float* const data = buffer.getWritePointer(0);
for(int sampleIndex = 0; sampleIndex < buffer.getNumSamples(); sampleIndex++)
{
data[sampleIndex] *= -1;
}
}
else
{
buffer.clear();
}
}// end falling Saw
void VAOscillator::fillBufferRisingSaw(AudioBuffer<float>& buffer, AudioBuffer<float>& phaseModBuffer, AudioBuffer<float>& volumeModBuffer, AudioBuffer<float>& pitchModBuffer)
{
if(isActive)
{
float* const data = buffer.getWritePointer(0);
float const *phaseMod = phaseModBuffer.getReadPointer(0);
float const *volMod = volumeModBuffer.getReadPointer(0);
float const *pitchMod = pitchModBuffer.getReadPointer(0);
//write momentary phase values into the buffer
for(int sampleIndex = 0; sampleIndex < buffer.getNumSamples(); sampleIndex++)
{
double phase = currentPhase + phaseModAmp * phaseMod[sampleIndex];
while (phase < 0)
{
phase += 2 * double_Pi;
}
while (phase > 2 * double_Pi)
{
phase -= 2 * double_Pi;
}
currentPhase += 2 * double_Pi * ((currentFrequency * (pitchMod[sampleIndex] + 2.0))/currentSampleRate);
if(currentPhase > 2 * double_Pi)
{
currentPhase -= 2 * double_Pi;
}
data[sampleIndex] = (float)((2 * phase)/(2 * double_Pi) - 1);
data[sampleIndex] += getBlep(phase , currentFrequency);// i have to watch out here because actually currentFrequency is not valid for this calculation
data[sampleIndex] *= std::abs(0.5f * (volMod[sampleIndex] + 1));
}
}
else
{
buffer.clear();
}
}// end rising Saw
Result Upsampler::upsample(AudioBuffer<float> const &inputBuffer, int const inputChannel, AudioBuffer<float> &outputBuffer_, int const outputChannel, int &outputSampleCount_)
{
int outputSamplesNeeded = roundDoubleToInt( (outputSampleRate * inputBuffer.getNumSamples())/ inputSampleRate);
if (outputBuffer_.getNumSamples() < outputSamplesNeeded)
return Result::fail("Output buffer too small");
//DBG("upsample inputSampleCount:" << inputSampleCount);
if (nullptr == resampler)
return Result::fail("No resampler object");
//
// Clear the resample and pump some initial zeros into it
//
resampler->clear();
#if 0
int preloadSamples = resampler->getInLenBeforeOutStart(MAX_RESAMPLER_INPUT_SAMPLES);
inputBlockBuffer.clear(MAX_RESAMPLER_INPUT_SAMPLES);
while (preloadSamples > 0)
{
int count = jmin((int)MAX_RESAMPLER_INPUT_SAMPLES, preloadSamples);
double* outputBlock = nullptr;
resampler->process(inputBlockBuffer, count, outputBlock);
preloadSamples -= count;
}
#endif
//
// Flush the output buffer
//
outputBuffer_.clear();
//
// Do the actual upsample
//
outputSampleCount_ = 0;
int inputSampleCount = inputBuffer.getNumSamples();
const float * source = inputBuffer.getReadPointer(inputChannel);
while (inputSampleCount > 0)
{
//
// Convert float to double
//
int inputConvertCount = jmin(inputSampleCount, (int)MAX_RESAMPLER_INPUT_SAMPLES);
for (int i = 0; i < inputConvertCount; ++i)
{
inputBlockBuffer[i] = *source;
source++;
}
inputSampleCount -= inputConvertCount;
//
// Run the SRC
//
double* outputBlock = nullptr;
int outputBlockSampleCount = resampler->process(inputBlockBuffer, inputConvertCount, outputBlock);
int outputSpaceRemaining = outputBuffer_.getNumSamples() - outputSampleCount_;
int outputCopyCount = jmin( outputSpaceRemaining, outputBlockSampleCount);
float *destination = outputBuffer_.getWritePointer(outputChannel, outputSampleCount_);
for (int i = 0; i < outputCopyCount; ++i)
{
*destination = (float)outputBlock[i];
destination++;
}
outputSampleCount_ += outputCopyCount;
}
//
// Keep filling the output buffer
//
inputBlockBuffer.clear(MAX_RESAMPLER_INPUT_SAMPLES);
while (outputSampleCount_ < outputBuffer_.getNumSamples())
{
//
// Run the SRC
//
double* outputBlock = nullptr;
int outputBlockSampleCount = resampler->process(inputBlockBuffer, MAX_RESAMPLER_INPUT_SAMPLES, outputBlock);
int outputSpaceRemaining = outputBuffer_.getNumSamples() - outputSampleCount_;
int outputCopyCount = jmin( outputSpaceRemaining, outputBlockSampleCount);
float *destination = outputBuffer_.getWritePointer(outputChannel, outputSampleCount_);
for (int i = 0; i < outputCopyCount; ++i)
{
*destination = (float)outputBlock[i];
destination++;
}
outputSampleCount_ += outputCopyCount;
}
//DBG(" outputSampleCount:" << outputSampleCount);
return Result::ok();
}
