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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 7 End-User License
Agreement and JUCE Privacy Policy.
End User License Agreement: www.juce.com/juce-7-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce::dsp
{
//==============================================================================
template <typename SampleType>
Chorus<SampleType>::Chorus()
{
auto oscFunction = [] (SampleType x) { return std::sin (x); };
osc.initialise (oscFunction);
dryWet.setMixingRule (DryWetMixingRule::linear);
}
template <typename SampleType>
void Chorus<SampleType>::setRate (SampleType newRateHz)
{
jassert (isPositiveAndBelow (newRateHz, static_cast<SampleType> (100.0)));
rate = newRateHz;
update();
}
template <typename SampleType>
void Chorus<SampleType>::setDepth (SampleType newDepth)
{
jassert (isPositiveAndNotGreaterThan (newDepth, maxDepth));
depth = newDepth;
update();
}
template <typename SampleType>
void Chorus<SampleType>::setCentreDelay (SampleType newDelayMs)
{
jassert (isPositiveAndBelow (newDelayMs, maxCentreDelayMs));
centreDelay = jlimit (static_cast<SampleType> (1.0), maxCentreDelayMs, newDelayMs);
}
template <typename SampleType>
void Chorus<SampleType>::setFeedback (SampleType newFeedback)
{
jassert (newFeedback >= static_cast<SampleType> (-1.0) && newFeedback <= static_cast<SampleType> (1.0));
feedback = newFeedback;
update();
}
template <typename SampleType>
void Chorus<SampleType>::setMix (SampleType newMix)
{
jassert (isPositiveAndNotGreaterThan (newMix, static_cast<SampleType> (1.0)));
mix = newMix;
update();
}
//==============================================================================
template <typename SampleType>
void Chorus<SampleType>::prepare (const ProcessSpec& spec)
{
jassert (spec.sampleRate > 0);
jassert (spec.numChannels > 0);
sampleRate = spec.sampleRate;
const auto maxPossibleDelay = std::ceil ((maximumDelayModulation * maxDepth * oscVolumeMultiplier + maxCentreDelayMs)
* sampleRate / 1000.0);
delay = DelayLine<SampleType, DelayLineInterpolationTypes::Linear>{ static_cast<int> (maxPossibleDelay) };
delay.prepare (spec);
dryWet.prepare (spec);
feedbackVolume.resize (spec.numChannels);
lastOutput.resize (spec.numChannels);
osc.prepare (spec);
bufferDelayTimes.setSize (1, (int) spec.maximumBlockSize, false, false, true);
update();
reset();
}
template <typename SampleType>
void Chorus<SampleType>::reset()
{
std::fill (lastOutput.begin(), lastOutput.end(), static_cast<SampleType> (0));
delay.reset();
osc.reset();
dryWet.reset();
oscVolume.reset (sampleRate, 0.05);
for (auto& vol : feedbackVolume)
vol.reset (sampleRate, 0.05);
}
template <typename SampleType>
void Chorus<SampleType>::update()
{
osc.setFrequency (rate);
oscVolume.setTargetValue (depth * oscVolumeMultiplier);
dryWet.setWetMixProportion (mix);
for (auto& vol : feedbackVolume)
vol.setTargetValue (feedback);
}
//==============================================================================
template class Chorus<float>;
template class Chorus<double>;
} // namespace juce::dsp
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