airwindows/plugins/MacVST/BezEQ/source/BezEQProc.cpp
Christopher Johnson 14f348fe83 BezEQ
2025-02-02 16:14:46 -05:00

228 lines
8 KiB
C++
Executable file

/* ========================================
* BezEQ - BezEQ.h
* Copyright (c) airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __BezEQ_H
#include "BezEQ.h"
#endif
void BezEQ::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double trebleGain = A * 2.0; trebleGain *= trebleGain;
double derezA = B/overallscale;
if (derezA < 0.01) derezA = 0.01; if (derezA > 1.0) derezA = 1.0;
derezA = 1.0 / ((int)(1.0/derezA));
double midGain = C * 2.0; midGain *= midGain;
double derezB = pow(D,4.0)/overallscale;
if (derezB < 0.0001) derezB = 0.0001; if (derezB > 1.0) derezB = 1.0;
derezB = 1.0 / ((int)(1.0/derezB));
double bassGain = E * 2.0; bassGain *= bassGain;
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;
bezA[bez_cycle] += derezA;
bezA[bez_SampL] += ((inputSampleL+bezA[bez_InL]) * derezA);
bezA[bez_InL] = inputSampleL;
bezA[bez_SampR] += ((inputSampleR+bezA[bez_InR]) * derezA);
bezA[bez_InR] = inputSampleR;
if (bezA[bez_cycle] > 1.0) { //hit the end point and we do a reverb sample
bezA[bez_cycle] = 0.0;
bezA[bez_CL] = bezA[bez_BL];
bezA[bez_BL] = bezA[bez_AL];
bezA[bez_AL] = inputSampleL;
bezA[bez_SampL] = 0.0;
bezA[bez_CR] = bezA[bez_BR];
bezA[bez_BR] = bezA[bez_AR];
bezA[bez_AR] = inputSampleR;
bezA[bez_SampR] = 0.0;
}
double CBL = (bezA[bez_CL]*(1.0-bezA[bez_cycle]))+(bezA[bez_BL]*bezA[bez_cycle]);
double BAL = (bezA[bez_BL]*(1.0-bezA[bez_cycle]))+(bezA[bez_AL]*bezA[bez_cycle]);
double CBAL = (bezA[bez_BL]+(CBL*(1.0-bezA[bez_cycle]))+(BAL*bezA[bez_cycle]))*0.5;
double midL = CBAL;
double trebleL = inputSampleL - CBAL;
double CBR = (bezA[bez_CR]*(1.0-bezA[bez_cycle]))+(bezA[bez_BR]*bezA[bez_cycle]);
double BAR = (bezA[bez_BR]*(1.0-bezA[bez_cycle]))+(bezA[bez_AR]*bezA[bez_cycle]);
double CBAR = (bezA[bez_BR]+(CBR*(1.0-bezA[bez_cycle]))+(BAR*bezA[bez_cycle]))*0.5;
double midR = CBAR;
double trebleR = inputSampleR - CBAR;
bezB[bez_cycle] += derezB;
bezB[bez_SampL] += ((midL+bezB[bez_InL]) * derezB);
bezB[bez_InL] = midL;
bezB[bez_SampR] += ((midR+bezB[bez_InR]) * derezB);
bezB[bez_InR] = midR;
if (bezB[bez_cycle] > 1.0) { //hit the end point and we do a reverb sample
bezB[bez_cycle] = 0.0;
bezB[bez_CL] = bezB[bez_BL];
bezB[bez_BL] = bezB[bez_AL];
bezB[bez_AL] = inputSampleL;
bezB[bez_SampL] = 0.0;
bezB[bez_CR] = bezB[bez_BR];
bezB[bez_BR] = bezB[bez_AR];
bezB[bez_AR] = inputSampleR;
bezB[bez_SampR] = 0.0;
}
CBL = (bezB[bez_CL]*(1.0-bezB[bez_cycle]))+(bezB[bez_BL]*bezB[bez_cycle]);
BAL = (bezB[bez_BL]*(1.0-bezB[bez_cycle]))+(bezB[bez_AL]*bezB[bez_cycle]);
CBAL = (bezB[bez_BL]+(CBL*(1.0-bezB[bez_cycle]))+(BAL*bezB[bez_cycle]))*0.5;
double bassL = CBAL;
midL -= bassL;
CBR = (bezB[bez_CR]*(1.0-bezB[bez_cycle]))+(bezB[bez_BR]*bezB[bez_cycle]);
BAR = (bezB[bez_BR]*(1.0-bezB[bez_cycle]))+(bezB[bez_AR]*bezB[bez_cycle]);
CBAR = (bezB[bez_BR]+(CBR*(1.0-bezB[bez_cycle]))+(BAR*bezB[bez_cycle]))*0.5;
double bassR = CBAR;
midR -= bassR;
inputSampleL = (bassL*bassGain) + (midL*midGain) + (trebleL*trebleGain);
inputSampleR = (bassR*bassGain) + (midR*midGain) + (trebleR*trebleGain);
//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 BezEQ::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double trebleGain = A * 2.0; trebleGain *= trebleGain;
double derezA = B/overallscale;
if (derezA < 0.01) derezA = 0.01; if (derezA > 1.0) derezA = 1.0;
derezA = 1.0 / ((int)(1.0/derezA));
double midGain = C * 2.0; midGain *= midGain;
double derezB = pow(D,4.0)/overallscale;
if (derezB < 0.0001) derezB = 0.0001; if (derezB > 1.0) derezB = 1.0;
derezB = 1.0 / ((int)(1.0/derezB));
double bassGain = E * 2.0; bassGain *= bassGain;
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;
bezA[bez_cycle] += derezA;
bezA[bez_SampL] += ((inputSampleL+bezA[bez_InL]) * derezA);
bezA[bez_InL] = inputSampleL;
bezA[bez_SampR] += ((inputSampleR+bezA[bez_InR]) * derezA);
bezA[bez_InR] = inputSampleR;
if (bezA[bez_cycle] > 1.0) { //hit the end point and we do a reverb sample
bezA[bez_cycle] = 0.0;
bezA[bez_CL] = bezA[bez_BL];
bezA[bez_BL] = bezA[bez_AL];
bezA[bez_AL] = inputSampleL;
bezA[bez_SampL] = 0.0;
bezA[bez_CR] = bezA[bez_BR];
bezA[bez_BR] = bezA[bez_AR];
bezA[bez_AR] = inputSampleR;
bezA[bez_SampR] = 0.0;
}
double CBL = (bezA[bez_CL]*(1.0-bezA[bez_cycle]))+(bezA[bez_BL]*bezA[bez_cycle]);
double BAL = (bezA[bez_BL]*(1.0-bezA[bez_cycle]))+(bezA[bez_AL]*bezA[bez_cycle]);
double CBAL = (bezA[bez_BL]+(CBL*(1.0-bezA[bez_cycle]))+(BAL*bezA[bez_cycle]))*0.5;
double midL = CBAL;
double trebleL = inputSampleL - CBAL;
double CBR = (bezA[bez_CR]*(1.0-bezA[bez_cycle]))+(bezA[bez_BR]*bezA[bez_cycle]);
double BAR = (bezA[bez_BR]*(1.0-bezA[bez_cycle]))+(bezA[bez_AR]*bezA[bez_cycle]);
double CBAR = (bezA[bez_BR]+(CBR*(1.0-bezA[bez_cycle]))+(BAR*bezA[bez_cycle]))*0.5;
double midR = CBAR;
double trebleR = inputSampleR - CBAR;
bezB[bez_cycle] += derezB;
bezB[bez_SampL] += ((midL+bezB[bez_InL]) * derezB);
bezB[bez_InL] = midL;
bezB[bez_SampR] += ((midR+bezB[bez_InR]) * derezB);
bezB[bez_InR] = midR;
if (bezB[bez_cycle] > 1.0) { //hit the end point and we do a reverb sample
bezB[bez_cycle] = 0.0;
bezB[bez_CL] = bezB[bez_BL];
bezB[bez_BL] = bezB[bez_AL];
bezB[bez_AL] = inputSampleL;
bezB[bez_SampL] = 0.0;
bezB[bez_CR] = bezB[bez_BR];
bezB[bez_BR] = bezB[bez_AR];
bezB[bez_AR] = inputSampleR;
bezB[bez_SampR] = 0.0;
}
CBL = (bezB[bez_CL]*(1.0-bezB[bez_cycle]))+(bezB[bez_BL]*bezB[bez_cycle]);
BAL = (bezB[bez_BL]*(1.0-bezB[bez_cycle]))+(bezB[bez_AL]*bezB[bez_cycle]);
CBAL = (bezB[bez_BL]+(CBL*(1.0-bezB[bez_cycle]))+(BAL*bezB[bez_cycle]))*0.5;
double bassL = CBAL;
midL -= bassL;
CBR = (bezB[bez_CR]*(1.0-bezB[bez_cycle]))+(bezB[bez_BR]*bezB[bez_cycle]);
BAR = (bezB[bez_BR]*(1.0-bezB[bez_cycle]))+(bezB[bez_AR]*bezB[bez_cycle]);
CBAR = (bezB[bez_BR]+(CBR*(1.0-bezB[bez_cycle]))+(BAR*bezB[bez_cycle]))*0.5;
double bassR = CBAR;
midR -= bassR;
inputSampleL = (bassL*bassGain) + (midL*midGain) + (trebleL*trebleGain);
inputSampleR = (bassR*bassGain) + (midR*midGain) + (trebleR*trebleGain);
//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++;
}
}