/*
* File: Calibre.cpp
*
* Version: 1.0
*
* Created: 1/11/20
*
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/*=============================================================================
Calibre.cpp
=============================================================================*/
#include "Calibre.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Calibre)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::Calibre
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Calibre::Calibre(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
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Calibre::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Calibre::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 = 3.0;
outParameterInfo.defaultValue = kDefaultValue_ParamTwo;
break;
case kParam_Three:
AUBase::FillInParameterName (outParameterInfo, kParameterThreeName, false);
outParameterInfo.unit = kAudioUnitParameterUnit_Generic;
outParameterInfo.minValue = 0.0;
outParameterInfo.maxValue = 3.0;
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;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Calibre::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Calibre::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Calibre::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Calibre::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____CalibreEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::CalibreKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Calibre::CalibreKernel::Reset()
{
for(int count = 0; count < 34; count++) {b[count] = 0;}
lastSample = 0.0;
fpd = 17;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Calibre::CalibreKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Calibre::CalibreKernel::Process( const Float32 *inSourceP,
Float32 *inDestP,
UInt32 inFramesToProcess,
UInt32 inNumChannels,
bool &ioSilence )
{
UInt32 nSampleFrames = inFramesToProcess;
const Float32 *sourceP = inSourceP;
Float32 *destP = inDestP;
Float64 threshold = GetParameter( kParam_One );
Float64 hardness;
Float64 breakup = (1.0-(threshold/2.0))*3.14159265358979;
Float64 bridgerectifier;
Float64 sqdrive = GetParameter( kParam_Two );
if (sqdrive > 1.0) sqdrive *= sqdrive;
sqdrive = sqrt(sqdrive);
Float64 indrive = GetParameter( kParam_Three );
if (indrive > 1.0) indrive *= indrive;
indrive *= (1.0+(0.1935*sqdrive));
//no gain loss of convolution for APIcolypse
//calibrate this to match noise level with character at 1.0
//you get for instance 0.819 and 1.0-0.819 is 0.181
Float64 randy;
Float64 outlevel = GetParameter( kParam_Four );
if (threshold < 1) hardness = 1.0 / (1.0-threshold);
else hardness = 999999999999999999999.0;
//set up hardness to exactly fill gap between threshold and 0db
//if threshold is literally 1 then hardness is infinite, so we make it very big
while (nSampleFrames-- > 0) {
long double inputSample = *sourceP;
if (fabs(inputSample)<1.18e-37) inputSample = fpd * 1.18e-37;
inputSample = *sourceP * indrive;
//calibrated to match gain through convolution and -0.3 correction
if (sqdrive > 0.0){
b[33] = b[32]; b[32] = b[31];
b[31] = b[30]; b[30] = b[29]; b[29] = b[28]; b[28] = b[27]; b[27] = b[26]; b[26] = b[25]; b[25] = b[24]; b[24] = b[23];
b[23] = b[22]; b[22] = b[21]; b[21] = b[20]; b[20] = b[19]; b[19] = b[18]; b[18] = b[17]; b[17] = b[16]; b[16] = b[15];
b[15] = b[14]; b[14] = b[13]; b[13] = b[12]; b[12] = b[11]; b[11] = b[10]; b[10] = b[9]; b[9] = b[8]; b[8] = b[7];
b[7] = b[6]; b[6] = b[5]; b[5] = b[4]; b[4] = b[3]; b[3] = b[2]; b[2] = b[1]; b[1] = b[0]; b[0] = inputSample * sqdrive;
inputSample -= (b[1] * (0.23505923670562212 - (0.00028312859289245*fabs(b[1]))));
inputSample += (b[2] * (0.08188436704577637 - (0.00008817721351341*fabs(b[2]))));
inputSample -= (b[3] * (0.05075798481700617 - (0.00018817166632483*fabs(b[3]))));
inputSample -= (b[4] * (0.00455811821873093 + (0.00001922902995296*fabs(b[4]))));
inputSample -= (b[5] * (0.00027610521433660 - (0.00013252525469291*fabs(b[5]))));
inputSample -= (b[6] * (0.03529246280346626 - (0.00002772989223299*fabs(b[6]))));
inputSample += (b[7] * (0.01784111585586136 + (0.00010230276997291*fabs(b[7]))));
inputSample -= (b[8] * (0.04394950700298298 - (0.00005910607126944*fabs(b[8]))));
inputSample += (b[9] * (0.01990770780547606 + (0.00007640328340556*fabs(b[9]))));
inputSample -= (b[10] * (0.04073629569741782 - (0.00007712327117090*fabs(b[10]))));
inputSample += (b[11] * (0.01349648572795252 + (0.00005959130575917*fabs(b[11]))));
inputSample -= (b[12] * (0.03191590248003717 - (0.00008418000575151*fabs(b[12]))));
inputSample += (b[13] * (0.00348795527924766 + (0.00005489156318238*fabs(b[13]))));
inputSample -= (b[14] * (0.02198496281481767 - (0.00008471601187581*fabs(b[14]))));
inputSample -= (b[15] * (0.00504771152505089 - (0.00005525060587917*fabs(b[15]))));
inputSample -= (b[16] * (0.01391075698598491 - (0.00007929630732607*fabs(b[16]))));
inputSample -= (b[17] * (0.01142762504081717 - (0.00005967036737742*fabs(b[17]))));
inputSample -= (b[18] * (0.00893541815021255 - (0.00007535697758141*fabs(b[18]))));
inputSample -= (b[19] * (0.01459704973464936 - (0.00005969199602841*fabs(b[19]))));
inputSample -= (b[20] * (0.00694755135226282 - (0.00006930127097865*fabs(b[20]))));
inputSample -= (b[21] * (0.01516695630808575 - (0.00006365800069826*fabs(b[21]))));
inputSample -= (b[22] * (0.00705917318113651 - (0.00006497209096539*fabs(b[22]))));
inputSample -= (b[23] * (0.01420501209177591 - (0.00006555654576113*fabs(b[23]))));
inputSample -= (b[24] * (0.00815905656808701 - (0.00006105622534761*fabs(b[24]))));
inputSample -= (b[25] * (0.01274326525552961 - (0.00006542652857017*fabs(b[25]))));
inputSample -= (b[26] * (0.00937146927845488 - (0.00006051267868722*fabs(b[26]))));
inputSample -= (b[27] * (0.01146573981165209 - (0.00006381511607749*fabs(b[27]))));
inputSample -= (b[28] * (0.01021294359409007 - (0.00005930397856398*fabs(b[28]))));
inputSample -= (b[29] * (0.01065217095323532 - (0.00006371505438319*fabs(b[29]))));
inputSample -= (b[30] * (0.01058751196699751 - (0.00006042857480233*fabs(b[30]))));
inputSample -= (b[31] * (0.01026557827762401 - (0.00006007776163871*fabs(b[31]))));
inputSample -= (b[32] * (0.01060929183604604 - (0.00006114703012726*fabs(b[32]))));
inputSample -= (b[33] * (0.01014533525058528 - (0.00005963567932887*fabs(b[33]))));}
if (fabs(inputSample) > threshold)
{
bridgerectifier = (fabs(inputSample)-threshold)*hardness;
//skip flat area if any, scale to distortion limit
if (bridgerectifier > breakup) bridgerectifier = breakup;
//max value for sine function, 'breakup' modeling for trashed console tone
//more hardness = more solidness behind breakup modeling. more softness, more 'grunge' and sag
bridgerectifier = sin(bridgerectifier)/hardness;
//do the sine factor, scale back to proper amount
if (inputSample > 0) inputSample = bridgerectifier+threshold;
else inputSample = -(bridgerectifier+threshold);
}
//otherwise we leave it untouched by the overdrive stuff
randy = ((rand()/(double)RAND_MAX)*0.042);
inputSample = ((inputSample*(1-randy))+(lastSample*randy)) * outlevel;
lastSample = inputSample;
//begin 32 bit floating point dither
int expon; frexpf((float)inputSample, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSample += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit floating point dither
*destP = inputSample;
sourceP += inNumChannels; destP += inNumChannels;
}
}
