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juce_BallisticsFilter.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
{
enum class BallisticsFilterLevelCalculationType
{
peak,
RMS
};
template <typename SampleType>
class BallisticsFilter
{
public:
//==============================================================================
using LevelCalculationType = BallisticsFilterLevelCalculationType;
//==============================================================================
BallisticsFilter();
//==============================================================================
void setAttackTime (SampleType attackTimeMs);
void setReleaseTime (SampleType releaseTimeMs);
void setLevelCalculationType (LevelCalculationType newCalculationType);
//==============================================================================
void prepare (const ProcessSpec& spec);
void reset();
void reset (SampleType initialValue);
//==============================================================================
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() <= yold.size());
jassert (inputBlock.getNumChannels() == numChannels);
jassert (inputBlock.getNumSamples() == numSamples);
if (context.isBypassed)
{
outputBlock.copyFrom (inputBlock);
return;
}
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)
outputSamples[i] = processSample ((int) channel, inputSamples[i]);
}
#if JUCE_DSP_ENABLE_SNAP_TO_ZERO
snapToZero();
#endif
}
SampleType processSample (int channel, SampleType inputValue);
void snapToZero() noexcept;
private:
//==============================================================================
SampleType calculateLimitedCte (SampleType) const noexcept;
//==============================================================================
std::vector<SampleType> yold;
double sampleRate = 44100.0, expFactor = -0.142;
SampleType attackTime = 1.0, releaseTime = 100.0, cteAT = 0.0, cteRL = 0.0;
LevelCalculationType levelType = LevelCalculationType::peak;
};
} // namespace juce::dsp
juce::dsp::BallisticsFilter::processSample
SampleType processSample(int channel, SampleType inputValue)
Definition juce_BallisticsFilter.cpp:89
juce::dsp::BallisticsFilter::reset
void reset()
Definition juce_BallisticsFilter.cpp:76
juce::dsp::BallisticsFilter::BallisticsFilter
BallisticsFilter()
Definition juce_BallisticsFilter.cpp:31
juce::dsp::BallisticsFilter::setAttackTime
void setAttackTime(SampleType attackTimeMs)
Definition juce_BallisticsFilter.cpp:38
juce::dsp::BallisticsFilter::prepare
void prepare(const ProcessSpec &spec)
Definition juce_BallisticsFilter.cpp:59
juce::dsp::BallisticsFilter::setReleaseTime
void setReleaseTime(SampleType releaseTimeMs)
Definition juce_BallisticsFilter.cpp:45
juce::dsp::BallisticsFilter::process
void process(const ProcessContext &context) noexcept
Definition juce_BallisticsFilter.h:96
juce::dsp::BallisticsFilter::snapToZero
void snapToZero() noexcept
Definition juce_BallisticsFilter.cpp:110
juce::dsp::BallisticsFilter::setLevelCalculationType
void setLevelCalculationType(LevelCalculationType newCalculationType)
Definition juce_BallisticsFilter.cpp:52
juce::dsp::ProcessSpec
Definition juce_ProcessContext.h:36