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juce_Limiter.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 Limiter
{
public:
//==============================================================================
Limiter() = default;
//==============================================================================
void setThreshold (SampleType newThreshold);
void setRelease (SampleType newRelease);
//==============================================================================
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.getNumSamples() == numSamples);
if (context.isBypassed)
{
outputBlock.copyFrom (inputBlock);
return;
}
firstStageCompressor.process (context);
auto secondContext = ProcessContextReplacing<SampleType> (outputBlock);
secondStageCompressor.process (secondContext);
outputBlock.multiplyBy (outputVolume);
for (size_t channel = 0; channel < numChannels; ++channel)
{
FloatVectorOperations::clip (outputBlock.getChannelPointer (channel), outputBlock.getChannelPointer (channel),
(SampleType) -1.0, (SampleType) 1.0, (int) numSamples);
}
}
private:
//==============================================================================
void update();
//==============================================================================
Compressor<SampleType> firstStageCompressor, secondStageCompressor;
SmoothedValue<SampleType, ValueSmoothingTypes::Linear> outputVolume;
double sampleRate = 44100.0;
SampleType thresholddB = -10.0, releaseTime = 100.0;
};
} // namespace juce::dsp
juce::SmoothedValue
Definition juce_SmoothedValue.h:227
juce::dsp::Compressor
Definition juce_Compressor.h:37
juce::dsp::Limiter::process
void process(const ProcessContext &context) noexcept
Definition juce_Limiter.h:60
juce::dsp::Limiter::setThreshold
void setThreshold(SampleType newThreshold)
Definition juce_Limiter.cpp:31
juce::dsp::Limiter::prepare
void prepare(const ProcessSpec &spec)
Definition juce_Limiter.cpp:46
juce::dsp::Limiter::setRelease
void setRelease(SampleType newRelease)
Definition juce_Limiter.cpp:38
juce::dsp::Limiter::Limiter
Limiter()=default
juce::dsp::Limiter::reset
void reset()
Definition juce_Limiter.cpp:61
juce::dsp::ProcessContextReplacing
Definition juce_ProcessContext.h:89
juce::dsp::ProcessSpec
Definition juce_ProcessContext.h:36