/*
* File: PurestSquish.cpp
*
* Version: 1.0
*
* Created: 11/29/18
*
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/*=============================================================================
PurestSquish.cpp
=============================================================================*/
#include "PurestSquish.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(PurestSquish)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::PurestSquish
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
PurestSquish::PurestSquish(AudioUnit component)
: AUEffectBase(component)
{
CreateElements();
Globals()->UseIndexedParameters(kNumberOfParameters);
SetParameter(kParam_One, kDefaultValue_ParamOne );
SetParameter(kParam_Two, kDefaultValue_ParamTwo );
SetParameter(kParam_Three, kDefaultValue_ParamThree );
SetParameter(kParam_Four, kDefaultValue_ParamFour );
#if AU_DEBUG_DISPATCHER
mDebugDispatcher = new AUDebugDispatcher (this);
#endif
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult PurestSquish::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult PurestSquish::GetParameterInfo(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
AudioUnitParameterInfo &outParameterInfo )
{
ComponentResult result = noErr;
outParameterInfo.flags = kAudioUnitParameterFlag_IsWritable
| kAudioUnitParameterFlag_IsReadable;
if (inScope == kAudioUnitScope_Global) {
switch(inParameterID)
{
case kParam_One:
AUBase::FillInParameterName (outParameterInfo, kParameterOneName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamOne;
break;
case kParam_Two:
AUBase::FillInParameterName (outParameterInfo, kParameterTwoName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
break;
case kParam_Three:
AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamThree;
break;
case kParam_Four:
AUBase::FillInParameterName (outParameterInfo, kParameterFourName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 1.0;
outParameterInfo.defaultValue = kDefaultValue_ParamFour;
break;
default:
result = kAudioUnitErr_InvalidParameter;
break;
}
} else {
result = kAudioUnitErr_InvalidParameter;
}
return result;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult PurestSquish::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult PurestSquish::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// PurestSquish::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult PurestSquish::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____PurestSquishEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::PurestSquishKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void PurestSquish::PurestSquishKernel::Reset()
{
muSpeedA = 10000;
muSpeedB = 10000;
muSpeedC = 10000;
muSpeedD = 10000;
muSpeedE = 10000;
muCoefficientA = 1;
muCoefficientB = 1;
muCoefficientC = 1;
muCoefficientD = 1;
muCoefficientE = 1;
iirSampleA = 0.0;
iirSampleB = 0.0;
iirSampleC = 0.0;
iirSampleD = 0.0;
iirSampleE = 0.0;
lastCoefficientA = 1;
lastCoefficientB = 1;
lastCoefficientC = 1;
lastCoefficientD = 1;
mergedCoefficients = 1;
muVary = 1;
count = 1;
fpFlip = true;
fpd = 17;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// PurestSquish::PurestSquishKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void PurestSquish::PurestSquishKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
long double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= GetSampleRate();
long double highpassSample;
long double highpassSampleB;
Float64 threshold = 1.01 - (1.0-pow(1.0-(GetParameter( kParam_One )*0.5),4));
Float64 iirAmount = pow(GetParameter( kParam_Two ),4)/overallscale;
Float64 output = GetParameter( kParam_Three );
Float64 wet = GetParameter( kParam_Four );
while (nSampleFrames-- > 0) {
long double inputSample = *sourceP;
static int noisesource = 0;
int residue;
double applyresidue;
noisesource = noisesource % 1700021; noisesource++;
residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSample += applyresidue;
if (inputSample<1.2e-38 && -inputSample<1.2e-38) {
inputSample -= applyresidue;
}
//for live air, we always apply the dither noise. Then, if our result is
//effectively digital black, we'll subtract it again. We want a 'air' hiss
long double drySample = inputSample;
Float64 muMakeupGain = 1.0 / threshold;
Float64 outMakeupGain = sqrt(muMakeupGain);
muMakeupGain += outMakeupGain;
muMakeupGain *= 0.5;
outMakeupGain *= 0.5;
//gain settings around threshold
Float64 release = mergedCoefficients * 32768.0;
release /= overallscale;
Float64 fastest = sqrt(release);
//speed settings around release
Float64 lastCorrection = mergedCoefficients;
// � � � � � � � � � � � � is the kitten song o/~
if (muMakeupGain != 1.0) inputSample = inputSample * muMakeupGain;
highpassSampleB = highpassSample = inputSample;
if (count < 1 || count > 3) count = 1;
switch (count)
{
case 1:
iirSampleA = (iirSampleA * (1 - iirAmount)) + (highpassSample * iirAmount);
highpassSample -= iirSampleA;
if (fabs(highpassSample) > threshold)
{
muVary = threshold / fabs(highpassSample);
muAttack = sqrt(fabs(muSpeedA));
muCoefficientA = muCoefficientA * (muAttack-1.0);
if (muVary < threshold)
{
muCoefficientA = muCoefficientA + threshold;
}
else
{
muCoefficientA = muCoefficientA + muVary;
}
muCoefficientA = muCoefficientA / muAttack;
}
else
{
muCoefficientA = muCoefficientA * ((muSpeedA * muSpeedA)-1.0);
muCoefficientA = muCoefficientA + 1.0;
muCoefficientA = muCoefficientA / (muSpeedA * muSpeedA);
}
muNewSpeed = muSpeedA * (muSpeedA-1);
muNewSpeed = muNewSpeed + fabs(highpassSample*release)+fastest;
muSpeedA = muNewSpeed / muSpeedA;
lastCoefficientA = pow(muCoefficientA,2);
mergedCoefficients = lastCoefficientB;
mergedCoefficients += lastCoefficientA;
lastCoefficientA *= (1.0 - lastCorrection);
lastCoefficientA += (muCoefficientA * lastCorrection);
lastCoefficientB = lastCoefficientA;
break;
case 2:
iirSampleB = (iirSampleB * (1 - iirAmount)) + (highpassSample * iirAmount);
highpassSample -= iirSampleB;
if (fabs(highpassSample) > threshold)
{
muVary = threshold / fabs(highpassSample);
muAttack = sqrt(fabs(muSpeedB));
muCoefficientB = muCoefficientB * (muAttack-1);
if (muVary < threshold)
{
muCoefficientB = muCoefficientB + threshold;
}
else
{
muCoefficientB = muCoefficientB + muVary;
}
muCoefficientB = muCoefficientB / muAttack;
}
else
{
muCoefficientB = muCoefficientB * ((muSpeedB * muSpeedB)-1.0);
muCoefficientB = muCoefficientB + 1.0;
muCoefficientB = muCoefficientB / (muSpeedB * muSpeedB);
}
muNewSpeed = muSpeedB * (muSpeedB-1);
muNewSpeed = muNewSpeed + fabs(highpassSample*release)+fastest;
muSpeedB = muNewSpeed / muSpeedB;
lastCoefficientA = pow(muCoefficientB,2);
mergedCoefficients = lastCoefficientB;
mergedCoefficients += lastCoefficientA;
lastCoefficientA *= (1.0 - lastCorrection);
lastCoefficientA += (muCoefficientB * lastCorrection);
lastCoefficientB = lastCoefficientA;
break;
case 3:
iirSampleC = (iirSampleC * (1 - iirAmount)) + (highpassSample * iirAmount);
highpassSample -= iirSampleC;
if (fabs(highpassSample) > threshold)
{
muVary = threshold / fabs(highpassSample);
muAttack = sqrt(fabs(muSpeedC));
muCoefficientC = muCoefficientC * (muAttack-1);
if (muVary < threshold)
{
muCoefficientC = muCoefficientC + threshold;
}
else
{
muCoefficientC = muCoefficientC + muVary;
}
muCoefficientC = muCoefficientC / muAttack;
}
else
{
muCoefficientC = muCoefficientC * ((muSpeedC * muSpeedC)-1.0);
muCoefficientC = muCoefficientC + 1.0;
muCoefficientC = muCoefficientC / (muSpeedC * muSpeedC);
}
muNewSpeed = muSpeedC * (muSpeedC-1);
muNewSpeed = muNewSpeed + fabs(highpassSample*release)+fastest;
muSpeedC = muNewSpeed / muSpeedC;
lastCoefficientA = pow(muCoefficientC,2);
mergedCoefficients = lastCoefficientB;
mergedCoefficients += lastCoefficientA;
lastCoefficientA *= (1.0 - lastCorrection);
lastCoefficientA += (muCoefficientC * lastCorrection);
lastCoefficientB = lastCoefficientA;
break;
}
count++;
//applied compression with vari-vari-�-�-�-�-�-�-is-the-kitten-song o/~
//applied gain correction to control output level- tends to constrain sound rather than inflate it
if (fpFlip) {
iirSampleD = (iirSampleD * (1 - iirAmount)) + (highpassSampleB * iirAmount);
highpassSampleB -= iirSampleD;
if (fabs(highpassSampleB) > threshold)
{
muVary = threshold / fabs(highpassSampleB);
muAttack = sqrt(fabs(muSpeedD));
muCoefficientD = muCoefficientD * (muAttack-1.0);
if (muVary < threshold)
{
muCoefficientD = muCoefficientD + threshold;
}
else
{
muCoefficientD = muCoefficientD + muVary;
}
muCoefficientD = muCoefficientD / muAttack;
}
else
{
muCoefficientD = muCoefficientD * ((muSpeedD * muSpeedD)-1.0);
muCoefficientD = muCoefficientD + 1.0;
muCoefficientD = muCoefficientD / (muSpeedD * muSpeedD);
}
muNewSpeed = muSpeedD * (muSpeedD-1);
muNewSpeed = muNewSpeed + fabs(highpassSampleB*release)+fastest;
muSpeedD = muNewSpeed / muSpeedD;
lastCoefficientC = pow(muCoefficientE,2);
mergedCoefficients += lastCoefficientD;
mergedCoefficients += lastCoefficientC;
lastCoefficientC *= (1.0 - lastCorrection);
lastCoefficientC += (muCoefficientD * lastCorrection);
lastCoefficientD = lastCoefficientC;
} else {
iirSampleE = (iirSampleE * (1 - iirAmount)) + (highpassSampleB * iirAmount);
highpassSampleB -= iirSampleE;
if (fabs(highpassSampleB) > threshold)
{
muVary = threshold / fabs(highpassSampleB);
muAttack = sqrt(fabs(muSpeedE));
muCoefficientE = muCoefficientE * (muAttack-1.0);
if (muVary < threshold)
{
muCoefficientE = muCoefficientE + threshold;
}
else
{
muCoefficientE = muCoefficientE + muVary;
}
muCoefficientE = muCoefficientE / muAttack;
}
else
{
muCoefficientE = muCoefficientE * ((muSpeedE * muSpeedE)-1.0);
muCoefficientE = muCoefficientE + 1.0;
muCoefficientE = muCoefficientE / (muSpeedE * muSpeedE);
}
muNewSpeed = muSpeedE * (muSpeedE-1);
muNewSpeed = muNewSpeed + fabs(highpassSampleB*release)+fastest;
muSpeedE = muNewSpeed / muSpeedE;
lastCoefficientC = pow(muCoefficientE,2);
mergedCoefficients += lastCoefficientD;
mergedCoefficients += lastCoefficientC;
lastCoefficientC *= (1.0 - lastCorrection);
lastCoefficientC += (muCoefficientE * lastCorrection);
lastCoefficientD = lastCoefficientC;
}
mergedCoefficients *= 0.25;
inputSample *= mergedCoefficients;
if (outMakeupGain != 1.0) inputSample = inputSample * outMakeupGain;
fpFlip = !fpFlip;
if (output < 1.0) {
inputSample *= output;
}
if (wet < 1.0) {
inputSample = (inputSample * wet) + (drySample * (1.0-wet));
}
//begin 32 bit floating point dither
int expon; frexpf((float)inputSample, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSample += static_cast<int32_t>(fpd) * 5.960464655174751e-36L * pow(2,expon+62);
//end 32 bit floating point dither
*destP = inputSample;
sourceP += inNumChannels; destP += inNumChannels;
}
}