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/*
==============================================================================
This file is part of the IEM plug-in suite.
Author: Daniel Rudrich
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 <JuceHeader.h>
#define ProcessorClass BinauralDecoderAudioProcessor
class BinauralDecoderAudioProcessor
: public AudioProcessorBase<IOTypes::Ambisonics<>, IOTypes::AudioChannels<2>>
{
public:
constexpr static int numberOfInputChannels = 64;
constexpr static int numberOfOutputChannels = 2;
//==============================================================================
BinauralDecoderAudioProcessor();
~BinauralDecoderAudioProcessor();
//==============================================================================
void prepareToPlay (double sampleRate, int samplesPerBlock) override;
void releaseResources() override;
void processBlock (juce::AudioBuffer<float>&, 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; // use this to implement a buffer update method
//======= Parameters ===========================================================
std::vector<std::unique_ptr<juce::RangedAudioParameter>> createParameterLayout();
//==============================================================================
static const juce::StringArray headphoneEQs;
private:
// list of used audio parameters
std::atomic<float>* inputOrderSetting;
std::atomic<float>* useSN3D;
std::atomic<float>* applyHeadphoneEq;
juce::dsp::Convolution EQ;
int fftLength = -1;
int irLength = 236;
int irLengthMinusOne = irLength - 1;
std::vector<std::complex<float>> fftBuffer;
std::vector<std::complex<float>> accumMid;
std::vector<std::complex<float>> accumSide;
std::unique_ptr<juce::dsp::FFT> fft;
juce::AudioBuffer<float> overlapBuffer;
juce::AudioBuffer<float> irs[7];
juce::AudioBuffer<float> irsFrequencyDomain;
double irsSampleRate = 44100.0;
//mapping between mid-channel index and channel index
const int mix2cix[36] = { 0, 2, 3, 6, 7, 8, 12, 13, 14, 15, 20, 21,
22, 23, 24, 30, 31, 32, 33, 34, 35, 42, 43, 44,
45, 46, 47, 48, 56, 57, 58, 59, 60, 61, 62, 63 };
//mapping between side-channel index and channel index
const int six2cix[28] = { 1, 4, 5, 9, 10, 11, 16, 17, 18, 19, 25, 26, 27, 28,
29, 36, 37, 38, 39, 40, 41, 49, 50, 51, 52, 53, 54, 55 };
int nMidCh;
int nSideCh;
//==============================================================================
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (BinauralDecoderAudioProcessor)
};
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