/*
* File: Cider.cpp
*
* Version: 1.0
*
* Created: 1/11/20
*
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/*=============================================================================
Cider.cpp
=============================================================================*/
#include "Cider.h"
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
COMPONENT_ENTRY(Cider)
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::Cider
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Cider::Cider(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
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::GetParameterValueStrings
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Cider::GetParameterValueStrings(AudioUnitScope inScope,
AudioUnitParameterID inParameterID,
CFArrayRef * outStrings)
{
return kAudioUnitErr_InvalidProperty;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::GetParameterInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Cider::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;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::GetPropertyInfo
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Cider::GetPropertyInfo (AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
UInt32 & outDataSize,
Boolean & outWritable)
{
return AUEffectBase::GetPropertyInfo (inID, inScope, inElement, outDataSize, outWritable);
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::GetProperty
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Cider::GetProperty( AudioUnitPropertyID inID,
AudioUnitScope inScope,
AudioUnitElement inElement,
void * outData )
{
return AUEffectBase::GetProperty (inID, inScope, inElement, outData);
}
// Cider::Initialize
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ComponentResult Cider::Initialize()
{
ComponentResult result = AUEffectBase::Initialize();
if (result == noErr)
Reset(kAudioUnitScope_Global, 0);
return result;
}
#pragma mark ____CiderEffectKernel
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::CiderKernel::Reset()
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Cider::CiderKernel::Reset()
{
for(int count = 0; count < 34; count++) {b[count] = 0;}
lastSample = 0.0;
fpd = 17;
}
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
// Cider::CiderKernel::Process
//~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
void Cider::CiderKernel::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-(0.216*sqdrive));
//correct for gain loss of convolution
//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 *= 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] * (0.61283288942201319 + (0.00024011410669522*fabs(b[1]))));
inputSample -= (b[2] * (0.24036380659761222 - (0.00020789518206241*fabs(b[2]))));
inputSample += (b[3] * (0.09104669761717916 + (0.00012829642741548*fabs(b[3]))));
inputSample -= (b[4] * (0.02378290768554025 - (0.00017673646470440*fabs(b[4]))));
inputSample -= (b[5] * (0.02832818490275965 - (0.00013536187747384*fabs(b[5]))));
inputSample += (b[6] * (0.03268797679215937 + (0.00015035126653359*fabs(b[6]))));
inputSample -= (b[7] * (0.04024464202655586 - (0.00015034923056735*fabs(b[7]))));
inputSample += (b[8] * (0.01864890074318696 + (0.00014513281680642*fabs(b[8]))));
inputSample -= (b[9] * (0.01632731954100322 - (0.00015509089075614*fabs(b[9]))));
inputSample -= (b[10] * (0.00318907090555589 - (0.00014784812076550*fabs(b[10]))));
inputSample -= (b[11] * (0.00208573465221869 - (0.00015350520779465*fabs(b[11]))));
inputSample -= (b[12] * (0.00907033901519614 - (0.00015442964157250*fabs(b[12]))));
inputSample -= (b[13] * (0.00199458794148013 - (0.00015595640046297*fabs(b[13]))));
inputSample -= (b[14] * (0.00705979153201755 - (0.00015730069418051*fabs(b[14]))));
inputSample -= (b[15] * (0.00429488975412722 - (0.00015743697943505*fabs(b[15]))));
inputSample -= (b[16] * (0.00497724878704936 - (0.00016014760011861*fabs(b[16]))));
inputSample -= (b[17] * (0.00506059305562353 - (0.00016194824072466*fabs(b[17]))));
inputSample -= (b[18] * (0.00483432223285621 - (0.00016329050124225*fabs(b[18]))));
inputSample -= (b[19] * (0.00495100420886005 - (0.00016297509798749*fabs(b[19]))));
inputSample -= (b[20] * (0.00489319520555115 - (0.00016472839684661*fabs(b[20]))));
inputSample -= (b[21] * (0.00489177657970308 - (0.00016791875866630*fabs(b[21]))));
inputSample -= (b[22] * (0.00487900894707044 - (0.00016755993898534*fabs(b[22]))));
inputSample -= (b[23] * (0.00486234009335561 - (0.00016968157345446*fabs(b[23]))));
inputSample -= (b[24] * (0.00485737490288736 - (0.00017180713324431*fabs(b[24]))));
inputSample -= (b[25] * (0.00484106070563455 - (0.00017251073661092*fabs(b[25]))));
inputSample -= (b[26] * (0.00483219429408410 - (0.00017321683790891*fabs(b[26]))));
inputSample -= (b[27] * (0.00482013597437550 - (0.00017392186866488*fabs(b[27]))));
inputSample -= (b[28] * (0.00480949628051497 - (0.00017569098775602*fabs(b[28]))));
inputSample -= (b[29] * (0.00479992055604049 - (0.00017746046369449*fabs(b[29]))));
inputSample -= (b[30] * (0.00478750757986987 - (0.00017745630047554*fabs(b[30]))));
inputSample -= (b[31] * (0.00477828651185740 - (0.00017958043287604*fabs(b[31]))));
inputSample -= (b[32] * (0.00476906544384494 - (0.00018170456527653*fabs(b[32]))));
inputSample -= (b[33] * (0.00475700712413634 - (0.00018099144598088*fabs(b[33]))));}
//we apply the first samples of the Focusrite impulse- dynamically adjusted.
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)*0.057);
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;
}
}
