Loading...
Searching...
No Matches
juce_Chorus.h
/*
==============================================================================
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>
class Chorus
{
public:
//==============================================================================
Chorus();
//==============================================================================
void setRate (SampleType newRateHz);
void setDepth (SampleType newDepth);
void setCentreDelay (SampleType newDelayMs);
void setFeedback (SampleType newFeedback);
void setMix (SampleType newMix);
//==============================================================================
void prepare (const ProcessSpec& spec);
void reset();
//==============================================================================
template <typename ProcessContext>
void process (const ProcessContext& context) noexcept
{
const auto& inputBlock = context.getInputBlock();
auto& outputBlock = context.getOutputBlock();
const auto numChannels = outputBlock.getNumChannels();
const auto numSamples = outputBlock.getNumSamples();
jassert (inputBlock.getNumChannels() == numChannels);
jassert (inputBlock.getNumChannels() == lastOutput.size());
jassert (inputBlock.getNumSamples() == numSamples);
if (context.isBypassed)
{
outputBlock.copyFrom (inputBlock);
return;
}
auto delayValuesBlock = AudioBlock<SampleType> (bufferDelayTimes).getSubBlock (0, numSamples);
auto contextDelay = ProcessContextReplacing<SampleType> (delayValuesBlock);
delayValuesBlock.clear();
osc.process (contextDelay);
delayValuesBlock.multiplyBy (oscVolume);
auto* delaySamples = bufferDelayTimes.getWritePointer (0);
for (size_t i = 0; i < numSamples; ++i)
{
auto lfo = jmax (static_cast<SampleType> (1.0), maximumDelayModulation * delaySamples[i] + centreDelay);
delaySamples[i] = static_cast<SampleType> (lfo * sampleRate / 1000.0);
}
dryWet.pushDrySamples (inputBlock);
for (size_t channel = 0; channel < numChannels; ++channel)
{
auto* inputSamples = inputBlock .getChannelPointer (channel);
auto* outputSamples = outputBlock.getChannelPointer (channel);
for (size_t i = 0; i < numSamples; ++i)
{
auto input = inputSamples[i];
auto output = input - lastOutput[channel];
delay.pushSample ((int) channel, output);
delay.setDelay (delaySamples[i]);
output = delay.popSample ((int) channel);
outputSamples[i] = output;
lastOutput[channel] = output * feedbackVolume[channel].getNextValue();
}
}
dryWet.mixWetSamples (outputBlock);
}
private:
//==============================================================================
void update();
//==============================================================================
Oscillator<SampleType> osc;
DelayLine<SampleType, DelayLineInterpolationTypes::Linear> delay;
SmoothedValue<SampleType, ValueSmoothingTypes::Linear> oscVolume;
std::vector<SmoothedValue<SampleType, ValueSmoothingTypes::Linear>> feedbackVolume { 2 };
DryWetMixer<SampleType> dryWet;
std::vector<SampleType> lastOutput { 2 };
AudioBuffer<SampleType> bufferDelayTimes;
double sampleRate = 44100.0;
SampleType rate = 1.0, depth = 0.25, feedback = 0.0, mix = 0.5,
centreDelay = 7.0;
static constexpr SampleType maxDepth = 1.0,
maxCentreDelayMs = 100.0,
oscVolumeMultiplier = 0.5,
maximumDelayModulation = 20.0;
};
} // namespace juce::dsp
juce::SmoothedValue
Definition juce_SmoothedValue.h:227
juce::dsp::AudioBlock
Definition juce_AudioBlock.h:68
juce::dsp::AudioBlock::getSubBlock
AudioBlock getSubBlock(size_t newOffset, size_t newLength) const noexcept
Definition juce_AudioBlock.h:369
juce::dsp::Chorus::setFeedback
void setFeedback(SampleType newFeedback)
Definition juce_Chorus.cpp:66
juce::dsp::Chorus::setDepth
void setDepth(SampleType newDepth)
Definition juce_Chorus.cpp:49
juce::dsp::Chorus::prepare
void prepare(const ProcessSpec &spec)
Definition juce_Chorus.cpp:85
juce::dsp::Chorus::setMix
void setMix(SampleType newMix)
Definition juce_Chorus.cpp:75
juce::dsp::Chorus::reset
void reset()
Definition juce_Chorus.cpp:109
juce::dsp::Chorus::process
void process(const ProcessContext &context) noexcept
Definition juce_Chorus.h:87
juce::dsp::Chorus::Chorus
Chorus()
Definition juce_Chorus.cpp:31
juce::dsp::Chorus::setRate
void setRate(SampleType newRateHz)
Definition juce_Chorus.cpp:40
juce::dsp::Chorus::setCentreDelay
void setCentreDelay(SampleType newDelayMs)
Definition juce_Chorus.cpp:58
juce::dsp::DelayLine
Definition juce_DelayLine.h:93
juce::dsp::Oscillator
Definition juce_Oscillator.h:36
juce::dsp::ProcessContextReplacing
Definition juce_ProcessContext.h:89
juce::dsp::ProcessSpec
Definition juce_ProcessContext.h:36