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147 lines
4.6 KiB
C++
147 lines
4.6 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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namespace juce::dsp
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{
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//==============================================================================
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template <typename SampleType>
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Chorus<SampleType>::Chorus()
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{
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auto oscFunction = [] (SampleType x) { return std::sin (x); };
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osc.initialise (oscFunction);
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dryWet.setMixingRule (DryWetMixingRule::linear);
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}
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template <typename SampleType>
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void Chorus<SampleType>::setRate (SampleType newRateHz)
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{
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jassert (isPositiveAndBelow (newRateHz, static_cast<SampleType> (100.0)));
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rate = newRateHz;
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update();
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}
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template <typename SampleType>
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void Chorus<SampleType>::setDepth (SampleType newDepth)
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{
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jassert (isPositiveAndNotGreaterThan (newDepth, maxDepth));
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depth = newDepth;
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update();
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}
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template <typename SampleType>
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void Chorus<SampleType>::setCentreDelay (SampleType newDelayMs)
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{
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jassert (isPositiveAndBelow (newDelayMs, maxCentreDelayMs));
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centreDelay = jlimit (static_cast<SampleType> (1.0), maxCentreDelayMs, newDelayMs);
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}
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template <typename SampleType>
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void Chorus<SampleType>::setFeedback (SampleType newFeedback)
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{
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jassert (newFeedback >= static_cast<SampleType> (-1.0) && newFeedback <= static_cast<SampleType> (1.0));
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feedback = newFeedback;
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update();
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}
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template <typename SampleType>
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void Chorus<SampleType>::setMix (SampleType newMix)
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{
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jassert (isPositiveAndNotGreaterThan (newMix, static_cast<SampleType> (1.0)));
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mix = newMix;
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update();
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}
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//==============================================================================
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template <typename SampleType>
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void Chorus<SampleType>::prepare (const ProcessSpec& spec)
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{
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jassert (spec.sampleRate > 0);
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jassert (spec.numChannels > 0);
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sampleRate = spec.sampleRate;
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const auto maxPossibleDelay = std::ceil ((maximumDelayModulation * maxDepth * oscVolumeMultiplier + maxCentreDelayMs)
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* sampleRate / 1000.0);
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delay = DelayLine<SampleType, DelayLineInterpolationTypes::Linear>{ static_cast<int> (maxPossibleDelay) };
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delay.prepare (spec);
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dryWet.prepare (spec);
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feedbackVolume.resize (spec.numChannels);
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lastOutput.resize (spec.numChannels);
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osc.prepare (spec);
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bufferDelayTimes.setSize (1, (int) spec.maximumBlockSize, false, false, true);
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update();
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reset();
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}
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template <typename SampleType>
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void Chorus<SampleType>::reset()
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{
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std::fill (lastOutput.begin(), lastOutput.end(), static_cast<SampleType> (0));
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delay.reset();
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osc.reset();
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dryWet.reset();
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oscVolume.reset (sampleRate, 0.05);
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for (auto& vol : feedbackVolume)
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vol.reset (sampleRate, 0.05);
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}
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template <typename SampleType>
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void Chorus<SampleType>::update()
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{
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osc.setFrequency (rate);
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oscVolume.setTargetValue (depth * oscVolumeMultiplier);
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dryWet.setWetMixProportion (mix);
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for (auto& vol : feedbackVolume)
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vol.setTargetValue (feedback);
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}
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//==============================================================================
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template class Chorus<float>;
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template class Chorus<double>;
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} // namespace juce::dsp
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