25bd5d8adb
subrepo: subdir: "deps/juce" merged: "b13f9084e" upstream: origin: "https://github.com/essej/JUCE.git" branch: "sono6good" commit: "b13f9084e" git-subrepo: version: "0.4.3" origin: "https://github.com/ingydotnet/git-subrepo.git" commit: "2f68596"
106 lines
3.6 KiB
C++
106 lines
3.6 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2020 - Raw Material Software Limited
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 6 End-User License
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Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
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End User License Agreement: www.juce.com/juce-6-licence
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Privacy Policy: www.juce.com/juce-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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namespace dsp
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{
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/**
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A simple limiter with standard threshold and release time controls, featuring
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two compressors and a hard clipper at 0 dB.
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@tags{DSP}
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*/
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template <typename SampleType>
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class Limiter
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{
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public:
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//==============================================================================
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/** Constructor. */
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Limiter() = default;
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//==============================================================================
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/** Sets the threshold in dB of the limiter.*/
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void setThreshold (SampleType newThreshold);
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/** Sets the release time in milliseconds of the limiter.*/
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void setRelease (SampleType newRelease);
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//==============================================================================
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/** Initialises the processor. */
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void prepare (const ProcessSpec& spec);
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/** Resets the internal state variables of the processor. */
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void reset();
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//==============================================================================
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/** Processes the input and output samples supplied in the processing context. */
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template <typename ProcessContext>
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void process (const ProcessContext& context) noexcept
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{
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const auto& inputBlock = context.getInputBlock();
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auto& outputBlock = context.getOutputBlock();
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const auto numChannels = outputBlock.getNumChannels();
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const auto numSamples = outputBlock.getNumSamples();
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jassert (inputBlock.getNumChannels() == numChannels);
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jassert (inputBlock.getNumSamples() == numSamples);
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if (context.isBypassed)
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{
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outputBlock.copyFrom (inputBlock);
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return;
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}
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firstStageCompressor.process (context);
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auto secondContext = ProcessContextReplacing<SampleType> (outputBlock);
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secondStageCompressor.process (secondContext);
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outputBlock.multiplyBy (outputVolume);
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for (size_t channel = 0; channel < numChannels; ++channel)
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{
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FloatVectorOperations::clip (outputBlock.getChannelPointer (channel), outputBlock.getChannelPointer (channel),
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(SampleType) -1.0, (SampleType) 1.0, (int) numSamples);
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}
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}
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private:
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//==============================================================================
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void update();
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//==============================================================================
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Compressor<SampleType> firstStageCompressor, secondStageCompressor;
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SmoothedValue<SampleType, ValueSmoothingTypes::Linear> outputVolume;
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double sampleRate = 44100.0;
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SampleType thresholddB = -10.0, releaseTime = 100.0;
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};
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} // namespace dsp
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} // namespace juce
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