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/* ========================================
* Capacitor - Capacitor.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Capacitor_H
#include "Capacitor.h"
#endif
void Capacitor::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);
wetChase = C;
//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;
double invLowpass;
double invHighpass;
double dry;
long double inputSampleL;
long double inputSampleR;
float drySampleL;
float drySampleR;
while (--sampleFrames >= 0)
{
inputSampleL = *in1;
inputSampleR = *in2;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int 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;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL = applyresidue;
}
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
static int noisesource = 0;
noisesource = noisesource % 1700021; noisesource++;
int 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;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
drySampleL = inputSampleL;
drySampleR = inputSampleR;
lowpassAmount = (((lowpassAmount*lowpassSpeed)+lowpassChase)/(lowpassSpeed + 1.0)); invLowpass = 1.0 - lowpassAmount;
highpassAmount = (((highpassAmount*highpassSpeed)+highpassChase)/(highpassSpeed + 1.0)); invHighpass = 1.0 - highpassAmount;
wet = (((wet*wetSpeed)+wetChase)/(wetSpeed+1.0)); dry = 1.0 - wet;
count++; if (count > 5) count = 0; switch (count)
{
case 0:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassBL;
iirHighpassDL = (iirHighpassDL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassBR;
iirHighpassDR = (iirHighpassDR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassDR;
break;
case 1:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassCL;
iirHighpassEL = (iirHighpassEL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassCR;
iirHighpassER = (iirHighpassER * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassER;
break;
case 2:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassBL;
iirHighpassFL = (iirHighpassFL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassBR;
iirHighpassFR = (iirHighpassFR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassFR;
break;
case 3:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassCL;
iirHighpassDL = (iirHighpassDL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassCR;
iirHighpassDR = (iirHighpassDR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassDR;
break;
case 4:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassBL;
iirHighpassEL = (iirHighpassEL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassBR;
iirHighpassER = (iirHighpassER * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassER;
break;
case 5:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassCL;
iirHighpassFL = (iirHighpassFL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassCR;
iirHighpassFR = (iirHighpassFR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpass) + (inputSampleR * lowpassAmount); 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 * dry) + (inputSampleL * wet);
inputSampleR = (drySampleR * dry) + (inputSampleR * wet);
//stereo 32 bit dither, made small and tidy.
int expon; frexpf((float)inputSampleL, &expon);
long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
frexpf((float)inputSampleR, &expon);
dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
//end 32 bit dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void Capacitor::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);
wetChase = C;
//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;
double invLowpass;
double invHighpass;
double dry;
long double inputSampleL;
long double inputSampleR;
double drySampleL;
double drySampleR;
while (--sampleFrames >= 0)
{
inputSampleL = *in1;
inputSampleR = *in2;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int 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;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL = applyresidue;
}
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
static int noisesource = 0;
noisesource = noisesource % 1700021; noisesource++;
int 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;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
drySampleL = inputSampleL;
drySampleR = inputSampleR;
lowpassAmount = (((lowpassAmount*lowpassSpeed)+lowpassChase)/(lowpassSpeed + 1.0)); invLowpass = 1.0 - lowpassAmount;
highpassAmount = (((highpassAmount*highpassSpeed)+highpassChase)/(highpassSpeed + 1.0)); invHighpass = 1.0 - highpassAmount;
wet = (((wet*wetSpeed)+wetChase)/(wetSpeed+1.0)); dry = 1.0 - wet;
count++; if (count > 5) count = 0; switch (count)
{
case 0:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassBL;
iirHighpassDL = (iirHighpassDL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassBR;
iirHighpassDR = (iirHighpassDR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassDR;
break;
case 1:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassCL;
iirHighpassEL = (iirHighpassEL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassCR;
iirHighpassER = (iirHighpassER * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassER;
break;
case 2:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassBL;
iirHighpassFL = (iirHighpassFL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassBR;
iirHighpassFR = (iirHighpassFR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassFR;
break;
case 3:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassCL;
iirHighpassDL = (iirHighpassDL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassDL;
iirLowpassDL = (iirLowpassDL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassDL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassCR;
iirHighpassDR = (iirHighpassDR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassDR;
iirLowpassDR = (iirLowpassDR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassDR;
break;
case 4:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassBL = (iirHighpassBL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassBL;
iirLowpassBL = (iirLowpassBL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassBL;
iirHighpassEL = (iirHighpassEL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassEL;
iirLowpassEL = (iirLowpassEL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassEL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassBR = (iirHighpassBR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassBR;
iirLowpassBR = (iirLowpassBR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassBR;
iirHighpassER = (iirHighpassER * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassER;
iirLowpassER = (iirLowpassER * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassER;
break;
case 5:
iirHighpassAL = (iirHighpassAL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassAL;
iirLowpassAL = (iirLowpassAL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassAL;
iirHighpassCL = (iirHighpassCL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassCL;
iirLowpassCL = (iirLowpassCL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassCL;
iirHighpassFL = (iirHighpassFL * invHighpass) + (inputSampleL * highpassAmount); inputSampleL -= iirHighpassFL;
iirLowpassFL = (iirLowpassFL * invLowpass) + (inputSampleL * lowpassAmount); inputSampleL = iirLowpassFL;
iirHighpassAR = (iirHighpassAR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassAR;
iirLowpassAR = (iirLowpassAR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassAR;
iirHighpassCR = (iirHighpassCR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassCR;
iirLowpassCR = (iirLowpassCR * invLowpass) + (inputSampleR * lowpassAmount); inputSampleR = iirLowpassCR;
iirHighpassFR = (iirHighpassFR * invHighpass) + (inputSampleR * highpassAmount); inputSampleR -= iirHighpassFR;
iirLowpassFR = (iirLowpassFR * invLowpass) + (inputSampleR * lowpassAmount); 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 * dry) + (inputSampleL * wet);
inputSampleR = (drySampleR * dry) + (inputSampleR * wet);
//stereo 64 bit dither, made small and tidy.
int expon; frexp((double)inputSampleL, &expon);
long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
dither /= 536870912.0; //needs this to scale to 64 bit zone
inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
frexp((double)inputSampleR, &expon);
dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
dither /= 536870912.0; //needs this to scale to 64 bit zone
inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
//end 64 bit dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
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