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PluginProcessor.cpp
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283 lines (243 loc) · 8.51 KB
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/*
==============================================================================
This file contains the basic framework code for a JUCE plugin processor.
==============================================================================
*/
#include "PluginProcessor.h"
#include "PluginEditor.h"
//==============================================================================
AndrewHp05compressorAudioProcessor::AndrewHp05compressorAudioProcessor()
#ifndef JucePlugin_PreferredChannelConfigurations
: AudioProcessor (BusesProperties()
#if ! JucePlugin_IsMidiEffect
#if ! JucePlugin_IsSynth
.withInput ("Input", juce::AudioChannelSet::stereo(), true)
#endif
.withOutput ("Output", juce::AudioChannelSet::stereo(), true)
#endif
)
#endif
{
addParameter(mThresholdParam = new juce::AudioParameterFloat("Threshold",
"Threshold",
-50.0f,
0.0f,
-15.0f
));
addParameter(mRatioParam = new juce::AudioParameterFloat("Ratio",
"Ratio",
1.0f,
20.0f,
5.0f
));
addParameter(mAttackParam = new juce::AudioParameterFloat("Attack Time",
"Attack",
0.1f,
10.0f,
0.20f
));
addParameter(mReleaseParam = new juce::AudioParameterFloat("Release Time",
"Release",
0.1f,
30.0f,
0.20f
));
}
AndrewHp05compressorAudioProcessor::~AndrewHp05compressorAudioProcessor()
{
}
//==============================================================================
const juce::String AndrewHp05compressorAudioProcessor::getName() const
{
return JucePlugin_Name;
}
bool AndrewHp05compressorAudioProcessor::acceptsMidi() const
{
#if JucePlugin_WantsMidiInput
return true;
#else
return false;
#endif
}
bool AndrewHp05compressorAudioProcessor::producesMidi() const
{
#if JucePlugin_ProducesMidiOutput
return true;
#else
return false;
#endif
}
bool AndrewHp05compressorAudioProcessor::isMidiEffect() const
{
#if JucePlugin_IsMidiEffect
return true;
#else
return false;
#endif
}
double AndrewHp05compressorAudioProcessor::getTailLengthSeconds() const
{
return 0.0;
}
int AndrewHp05compressorAudioProcessor::getNumPrograms()
{
return 1; // NB: some hosts don't cope very well if you tell them there are 0 programs,
// so this should be at least 1, even if you're not really implementing programs.
}
int AndrewHp05compressorAudioProcessor::getCurrentProgram()
{
return 0;
}
void AndrewHp05compressorAudioProcessor::setCurrentProgram (int index)
{
}
const juce::String AndrewHp05compressorAudioProcessor::getProgramName (int index)
{
return {};
}
void AndrewHp05compressorAudioProcessor::changeProgramName (int index, const juce::String& newName)
{
}
//==============================================================================
void AndrewHp05compressorAudioProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
{
// Use this method as the place to do any pre-playback
// initialisation that you need..
mFs = sampleRate;
mEnvB0 = 1 - exp(-1 / (mEnvTau * mFs));
}
void AndrewHp05compressorAudioProcessor::releaseResources()
{
// When playback stops, you can use this as an opportunity to free up any
// spare memory, etc.
}
#ifndef JucePlugin_PreferredChannelConfigurations
bool AndrewHp05compressorAudioProcessor::isBusesLayoutSupported (const BusesLayout& layouts) const
{
#if JucePlugin_IsMidiEffect
juce::ignoreUnused (layouts);
return true;
#else
// This is the place where you check if the layout is supported.
// In this template code we only support mono or stereo.
if (layouts.getMainOutputChannelSet() != juce::AudioChannelSet::mono()
&& layouts.getMainOutputChannelSet() != juce::AudioChannelSet::stereo())
return false;
// This checks if the input layout matches the output layout
#if ! JucePlugin_IsSynth
if (layouts.getMainOutputChannelSet() != layouts.getMainInputChannelSet())
return false;
#endif
return true;
#endif
}
#endif
void AndrewHp05compressorAudioProcessor::calcAlgorithmParams()
{
threshold = mThresholdParam->get();
ratio = mRatioParam->get();
tauAttack = mAttackParam->get();
attackCoeff = 1 - exp(-1 / ((.1 * tauAttack) * mFs));
tauRelease = mReleaseParam->get();
releaseCoeff = 1 - exp(-1 / ((.1 * tauRelease) * mFs));
}
void AndrewHp05compressorAudioProcessor::processBlock (juce::AudioBuffer<float>& buffer, juce::MidiBuffer& midiMessages)
{
juce::ScopedNoDenormals noDenormals;
auto totalNumInputChannels = getTotalNumInputChannels();
auto totalNumOutputChannels = getTotalNumOutputChannels();
for (auto i = totalNumInputChannels; i < totalNumOutputChannels; ++i)
buffer.clear (i, 0, buffer.getNumSamples());
auto* channelDataLeft = buffer.getWritePointer(0);
auto* channelDataRight = buffer.getWritePointer(1);
calcAlgorithmParams();
float tempDiff = 1;
float cDb;
//float gOut;
float gainCoeff;
float tempL, tempR, tempEnv, tempEnvDb, outL, outR;
float cDbToLin;
for (int samp = 0; samp < buffer.getNumSamples(); samp++)
{
outL = channelDataLeft[samp];
outR = channelDataRight[samp];
//DBG(outL);
///////////////////////////////////////////////////////
//Level detector
//Square input for RMS
tempL = channelDataLeft[samp] * channelDataLeft[samp];
tempR = channelDataRight[samp] * channelDataRight[samp];
//mix input
tempEnv = 0.5 * (tempL + tempR);
//1-pole LPF (Mean)
mEnvOut += mEnvB0 * (tempEnv - mEnvOut);
//take root for RMS
tempEnv = sqrt(mEnvOut);
//convert to dB
tempEnvDb = 20 * log10(tempEnv);
//tempEnvDb = 10 * log(tempEnv);
//DBG(tempEnvDb);
///////////////////////////////////////////////////////
//Gain computer
if (tempEnvDb > threshold)
{
cDb = (tempEnvDb - threshold) * ((1 / ratio) - 1);
//DBG(cDb);
cDbToLin = pow(10.0, cDb / 20);
//DBG(cDbToLin);
//outL = channelDataLeft[samp];
//outR = 0.1 * cDbToLin;
//DBG(outL);
//gOut = cDb;
}
else
{
cDbToLin = 1;
}
if (cDbToLin <= gOut)
{
gainCoeff = attackCoeff;
//DBG("ATTACK");
}
else
{
gainCoeff = releaseCoeff;
//DBG("RELEASE");
}
//DBG(gainCoeff);
gOut += gainCoeff * (cDbToLin - gOut);
//DBG(gOut);
outL = channelDataLeft[samp] * gOut;
outR = channelDataRight[samp] * gOut;
// Debug Envelope Follower
channelDataLeft[samp] = outL; // write input to output
channelDataRight[samp] = outR; // write env to an audio output for debugging
}
}
//==============================================================================
bool AndrewHp05compressorAudioProcessor::hasEditor() const
{
return true; // (change this to false if you choose to not supply an editor)
}
juce::AudioProcessorEditor* AndrewHp05compressorAudioProcessor::createEditor()
{
return new AndrewHp05compressorAudioProcessorEditor (*this);
}
//==============================================================================
void AndrewHp05compressorAudioProcessor::getStateInformation (juce::MemoryBlock& destData)
{
// You should use this method to store your parameters in the memory block.
// You could do that either as raw data, or use the XML or ValueTree classes
// as intermediaries to make it easy to save and load complex data.
}
void AndrewHp05compressorAudioProcessor::setStateInformation (const void* data, int sizeInBytes)
{
// You should use this method to restore your parameters from this memory block,
// whose contents will have been created by the getStateInformation() call.
}
//==============================================================================
// This creates new instances of the plugin..
juce::AudioProcessor* JUCE_CALLTYPE createPluginFilter()
{
return new AndrewHp05compressorAudioProcessor();
}