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/*
==============================================================================
This file is part of the IEM plug-in suite.
Author: Markus Huber
Copyright (c) 2017 - Institute of Electronic Music and Acoustics (IEM)
https://iem.at
The IEM plug-in suite is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
The IEM plug-in suite is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this software. If not, see <https://www.gnu.org/licenses/>.
==============================================================================
*/
#pragma once
#include "../../resources/AudioProcessorBase.h"
#include "../JuceLibraryCode/JuceHeader.h"
#include "../../resources/Compressor.h"
#include "../../resources/FilterVisualizerHelper.h"
#define ProcessorClass MultiBandCompressorAudioProcessor
#define numFilterBands 4
using namespace juce::dsp;
using ParameterLayout = juce::AudioProcessorValueTreeState::ParameterLayout;
class MultiBandCompressorAudioProcessor
: public AudioProcessorBase<IOTypes::Ambisonics<>, IOTypes::Ambisonics<>>
{
public:
constexpr static int numberOfInputChannels = 64;
constexpr static int numberOfOutputChannels = 64;
//==============================================================================
MultiBandCompressorAudioProcessor();
~MultiBandCompressorAudioProcessor();
//==============================================================================
void prepareToPlay (double sampleRate, int samplesPerBlock) override;
void releaseResources() override;
#ifndef JucePlugin_PreferredChannelConfigurations
bool isBusesLayoutSupported (const BusesLayout& layouts) const override;
#endif
void processBlock (juce::AudioSampleBuffer&, juce::MidiBuffer&) override;
//==============================================================================
juce::AudioProcessorEditor* createEditor() override;
bool hasEditor() const override;
//==============================================================================
int getNumPrograms() override;
int getCurrentProgram() override;
void setCurrentProgram (int index) override;
const juce::String getProgramName (int index) override;
void changeProgramName (int index, const juce::String& newName) override;
//==============================================================================
void getStateInformation (juce::MemoryBlock& destData) override;
void setStateInformation (const void* data, int sizeInBytes) override;
//==============================================================================
void parameterChanged (const juce::String& parameterID, float newValue) override;
void updateBuffers() override;
//======= Parameters ===========================================================
std::vector<std::unique_ptr<juce::RangedAudioParameter>> createParameterLayout();
#if JUCE_USE_SIMD
using IIRfloat = SIMDRegister<float>;
static constexpr int IIRfloat_elements = SIMDRegister<float>::size();
#else /* !JUCE_USE_SIMD */
using IIRfloat = float;
static constexpr int IIRfloat_elements = 1;
#endif
enum FrequencyBands
{
Low,
MidLow,
MidHigh,
High
};
// Interface for gui
double& getSampleRate() { return lastSampleRate; };
IIR::Coefficients<double>::Ptr lowPassLRCoeffs[numFilterBands - 1];
IIR::Coefficients<double>::Ptr highPassLRCoeffs[numFilterBands - 1];
juce::Atomic<bool> repaintFilterVisualization = false;
juce::Atomic<float> inputPeak = juce::Decibels::gainToDecibels (-INFINITY),
outputPeak = juce::Decibels::gainToDecibels (-INFINITY);
juce::Atomic<float> maxGR[numFilterBands], maxPeak[numFilterBands];
juce::Atomic<bool> characteristicHasChanged[numFilterBands];
iem::Compressor* getCompressor (const int i) { return &compressors[i]; };
private:
void calculateCoefficients (const int index);
void copyCoeffsToProcessor();
inline void clear (juce::dsp::AudioBlock<IIRfloat>& ab);
double lastSampleRate { 48000 };
const int maxNumFilters;
// list of used audio parameters
std::atomic<float>* orderSetting;
std::atomic<float>* crossovers[numFilterBands - 1];
std::atomic<float>* threshold[numFilterBands];
std::atomic<float>* knee[numFilterBands];
std::atomic<float>* makeUpGain[numFilterBands];
std::atomic<float>* ratio[numFilterBands];
std::atomic<float>* attack[numFilterBands];
std::atomic<float>* release[numFilterBands];
std::atomic<float>* bypass[numFilterBands];
juce::BigInteger soloArray;
iem::Compressor compressors[numFilterBands];
// filter coefficients
juce::dsp::IIR::Coefficients<float>::Ptr iirLPCoefficients[numFilterBands - 1],
iirHPCoefficients[numFilterBands - 1], iirAPCoefficients[numFilterBands - 1],
iirTempLPCoefficients[numFilterBands - 1], iirTempHPCoefficients[numFilterBands - 1],
iirTempAPCoefficients[numFilterBands - 1];
// filters (cascaded butterworth/linkwitz-riley filters + allpass)
juce::OwnedArray<IIR::Filter<IIRfloat>> iirLP[numFilterBands - 1], iirHP[numFilterBands - 1],
iirLP2[numFilterBands - 1], iirHP2[numFilterBands - 1], iirAP[numFilterBands - 1];
// data for interleaving audio
juce::HeapBlock<char> zeroData;
std::vector<juce::HeapBlock<char>> interleavedBlockData;
juce::OwnedArray<juce::dsp::AudioBlock<IIRfloat>> interleavedData;
juce::dsp::AudioBlock<float> zero;
juce::AudioBuffer<float> tempBuffer;
// filters for processing
juce::OwnedArray<juce::dsp::AudioBlock<IIRfloat>> freqBands[numFilterBands];
std::vector<juce::HeapBlock<char>> freqBandsBlocks[numFilterBands];
// Additional compressor parameters
float* gainChannelPointer;
juce::dsp::AudioBlock<float> gains;
juce::HeapBlock<char> gainData;
juce::Atomic<bool> userChangedFilterSettings = true;
//==============================================================================
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MultiBandCompressorAudioProcessor)
};
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