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airwindows/plugins/LinuxVST/src/Capacitor2/Capacitor2Proc.cpp
airwindows 2032a0aa1b Acceleration through Aura
2022-02-28 01:18:26 -05:00

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/* ========================================
* Capacitor2 - Capacitor2.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Capacitor2_H
#include "Capacitor2.h"
#endif
void Capacitor2::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
lowpassChase = pow(A,2);
highpassChase = pow(B,2);
double nonLin = 1.0+((1.0-C)*6.0);
double nonLinTrim = 1.5/cbrt(nonLin);
wetChase = D;
//should not scale with sample rate, because values reaching 1 are important
//to its ability to bypass when set to max
double lowpassSpeed = 300 / (fabs( lastLowpass - lowpassChase)+1.0);
double highpassSpeed = 300 / (fabs( lastHighpass - highpassChase)+1.0);
double wetSpeed = 300 / (fabs( lastWet - wetChase)+1.0);
lastLowpass = lowpassChase;
lastHighpass = highpassChase;
lastWet = wetChase;
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
double dielectricScaleL = fabs(2.0-((inputSampleL+nonLin)/nonLin));
double dielectricScaleR = fabs(2.0-((inputSampleR+nonLin)/nonLin));
lowpassBaseAmount = (((lowpassBaseAmount*lowpassSpeed)+lowpassChase)/(lowpassSpeed + 1.0));
//positive voltage will mean lower capacitance when capacitor is barium titanate
//on the lowpass, higher pressure means positive swings/smaller cap/larger value for lowpassAmount
double lowpassAmountL = lowpassBaseAmount * dielectricScaleL;
double invLowpassL = 1.0 - lowpassAmountL;
double lowpassAmountR = lowpassBaseAmount * dielectricScaleR;
double invLowpassR = 1.0 - lowpassAmountR;
highpassBaseAmount = (((highpassBaseAmount*highpassSpeed)+highpassChase)/(highpassSpeed + 1.0));
//positive voltage will mean lower capacitance when capacitor is barium titanate
//on the highpass, higher pressure means positive swings/smaller cap/larger value for highpassAmount
double highpassAmountL = highpassBaseAmount * dielectricScaleL;
double invHighpassL = 1.0 - highpassAmountL;
double highpassAmountR = highpassBaseAmount * dielectricScaleR;
double invHighpassR = 1.0 - highpassAmountR;
wet = (((wet*wetSpeed)+wetChase)/(wetSpeed+1.0));
count++; if (count > 5) count = 0; switch (count)
{
case 0:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassBL;
iirHighpassDL = (iirHighpassDL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassBR;
iirHighpassDR = (iirHighpassDR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassDR;
break;
case 1:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassCL;
iirHighpassEL = (iirHighpassEL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassCR;
iirHighpassER = (iirHighpassER * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassER;
break;
case 2:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassBL;
iirHighpassFL = (iirHighpassFL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassBR;
iirHighpassFR = (iirHighpassFR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassFR;
break;
case 3:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassCL;
iirHighpassDL = (iirHighpassDL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassCR;
iirHighpassDR = (iirHighpassDR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassDR;
break;
case 4:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassBL;
iirHighpassEL = (iirHighpassEL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassBR;
iirHighpassER = (iirHighpassER * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassER;
break;
case 5:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassCL;
iirHighpassFL = (iirHighpassFL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassCR;
iirHighpassFR = (iirHighpassFR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassFR;
break;
}
//Highpass Filter chunk. This is three poles of IIR highpass, with a 'gearbox' that progressively
//steepens the filter after minimizing artifacts.
inputSampleL = (drySampleL * (1.0-wet)) + (inputSampleL * nonLinTrim * wet);
inputSampleR = (drySampleR * (1.0-wet)) + (inputSampleR * nonLinTrim * wet);
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void Capacitor2::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
lowpassChase = pow(A,2);
highpassChase = pow(B,2);
double nonLin = 1.0+((1.0-C)*6.0);
double nonLinTrim = 1.5/cbrt(nonLin);
wetChase = D;
//should not scale with sample rate, because values reaching 1 are important
//to its ability to bypass when set to max
double lowpassSpeed = 300 / (fabs( lastLowpass - lowpassChase)+1.0);
double highpassSpeed = 300 / (fabs( lastHighpass - highpassChase)+1.0);
double wetSpeed = 300 / (fabs( lastWet - wetChase)+1.0);
lastLowpass = lowpassChase;
lastHighpass = highpassChase;
lastWet = wetChase;
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-43) inputSampleL = fpd * 1.18e-43;
if (fabs(inputSampleR)<1.18e-43) inputSampleR = fpd * 1.18e-43;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
double dielectricScaleL = fabs(2.0-((inputSampleL+nonLin)/nonLin));
double dielectricScaleR = fabs(2.0-((inputSampleR+nonLin)/nonLin));
lowpassBaseAmount = (((lowpassBaseAmount*lowpassSpeed)+lowpassChase)/(lowpassSpeed + 1.0));
//positive voltage will mean lower capacitance when capacitor is barium titanate
//on the lowpass, higher pressure means positive swings/smaller cap/larger value for lowpassAmount
double lowpassAmountL = lowpassBaseAmount * dielectricScaleL;
double invLowpassL = 1.0 - lowpassAmountL;
double lowpassAmountR = lowpassBaseAmount * dielectricScaleR;
double invLowpassR = 1.0 - lowpassAmountR;
highpassBaseAmount = (((highpassBaseAmount*highpassSpeed)+highpassChase)/(highpassSpeed + 1.0));
//positive voltage will mean lower capacitance when capacitor is barium titanate
//on the highpass, higher pressure means positive swings/smaller cap/larger value for highpassAmount
double highpassAmountL = highpassBaseAmount * dielectricScaleL;
double invHighpassL = 1.0 - highpassAmountL;
double highpassAmountR = highpassBaseAmount * dielectricScaleR;
double invHighpassR = 1.0 - highpassAmountR;
wet = (((wet*wetSpeed)+wetChase)/(wetSpeed+1.0));
count++; if (count > 5) count = 0; switch (count)
{
case 0:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassBL;
iirHighpassDL = (iirHighpassDL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassBR;
iirHighpassDR = (iirHighpassDR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassDR;
break;
case 1:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassCL;
iirHighpassEL = (iirHighpassEL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassCR;
iirHighpassER = (iirHighpassER * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassER;
break;
case 2:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassBL;
iirHighpassFL = (iirHighpassFL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassBR;
iirHighpassFR = (iirHighpassFR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassFR;
break;
case 3:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassCL;
iirHighpassDL = (iirHighpassDL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassCR;
iirHighpassDR = (iirHighpassDR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassDR;
break;
case 4:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassBL;
iirHighpassEL = (iirHighpassEL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassBR;
iirHighpassER = (iirHighpassER * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassER;
break;
case 5:
iirHighpassAL = (iirHighpassAL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassCL;
iirHighpassFL = (iirHighpassFL * invHighpassL) + (inputSampleL * highpassAmountL); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpassL) + (inputSampleL * lowpassAmountL); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassCR;
iirHighpassFR = (iirHighpassFR * invHighpassR) + (inputSampleR * highpassAmountR); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpassR) + (inputSampleR * lowpassAmountR); inputSampleR = iirLowpassFR;
break;
}
//Highpass Filter chunk. This is three poles of IIR highpass, with a 'gearbox' that progressively
//steepens the filter after minimizing artifacts.
inputSampleL = (drySampleL * (1.0-wet)) + (inputSampleL * nonLinTrim * wet);
inputSampleR = (drySampleR * (1.0-wet)) + (inputSampleR * nonLinTrim * wet);
//begin 64 bit stereo floating point dither
//int expon; frexp((double)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//frexp((double)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//end 64 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
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