airwindows/plugins/MacSignedVST/DeRez3/source/DeRez3Proc.cpp
Christopher Johnson 7623a1c14b Wolfbot
2024-06-23 16:02:36 -04:00

192 lines
6.4 KiB
C++
Executable file

/* ========================================
* DeRez3 - DeRez3.h
* Copyright (c) airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __DeRez3_H
#include "DeRez3.h"
#endif
void DeRez3::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
rezA = rezB;
rezB = pow(A,3.0)/overallscale;
bitA = bitB;
bitB = (B*15.0)+1.0;
wetA = wetB;
wetB = C*2.0;
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 temp = (double)sampleFrames/inFramesToProcess;
double rez = (rezA*temp)+(rezB*(1.0-temp));
double bit = (bitA*temp)+(bitB*(1.0-temp));
double wet = (wetA*temp)+(wetB*(1.0-temp));
if (rez < 0.0005) rez = 0.0005;
double bitFactor = pow(2.0,bit);
double dry = 2.0 - wet;
if (wet > 1.0) wet = 1.0;
if (wet < 0.0) wet = 0.0;
if (dry > 1.0) dry = 1.0;
if (dry < 0.0) dry = 0.0;
//this bitcrush makes 50% full dry AND full wet, not crossfaded.
//that's so it can be on tracks without cutting back dry channel when adjusted
inputSampleL *= bitFactor;
inputSampleL = floor(inputSampleL+(0.5/bitFactor));
inputSampleL /= bitFactor;
inputSampleR *= bitFactor;
inputSampleR = floor(inputSampleR+(0.5/bitFactor));
inputSampleR /= bitFactor;
bez[bez_cycle] += rez;
bez[bez_SampL] += (inputSampleL * rez);
bez[bez_SampR] += (inputSampleR * rez);
if (bez[bez_cycle] > 1.0) {
bez[bez_cycle] -= 1.0;
bez[bez_CL] = bez[bez_BL];
bez[bez_BL] = bez[bez_AL];
bez[bez_AL] = inputSampleL;
bez[bez_SampL] = 0.0;
bez[bez_CR] = bez[bez_BR];
bez[bez_BR] = bez[bez_AR];
bez[bez_AR] = inputSampleR;
bez[bez_SampR] = 0.0;
}
double CBL = (bez[bez_CL]*(1.0-bez[bez_cycle]))+(bez[bez_BL]*bez[bez_cycle]);
double CBR = (bez[bez_CR]*(1.0-bez[bez_cycle]))+(bez[bez_BR]*bez[bez_cycle]);
double BAL = (bez[bez_BL]*(1.0-bez[bez_cycle]))+(bez[bez_AL]*bez[bez_cycle]);
double BAR = (bez[bez_BR]*(1.0-bez[bez_cycle]))+(bez[bez_AR]*bez[bez_cycle]);
double CBAL = (bez[bez_BL]+(CBL*(1.0-bez[bez_cycle]))+(BAL*bez[bez_cycle]))*0.5;
double CBAR = (bez[bez_BR]+(CBR*(1.0-bez[bez_cycle]))+(BAR*bez[bez_cycle]))*0.5;
inputSampleL = (wet*CBAL)+(dry*drySampleL);
inputSampleR = (wet*CBAR)+(dry*drySampleR);
//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 DeRez3::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
rezA = rezB;
rezB = pow(A,3.0)/overallscale;
bitA = bitB;
bitB = (B*15.0)+1.0;
wetA = wetB;
wetB = C*2.0;
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 temp = (double)sampleFrames/inFramesToProcess;
double rez = (rezA*temp)+(rezB*(1.0-temp));
double bit = (bitA*temp)+(bitB*(1.0-temp));
double wet = (wetA*temp)+(wetB*(1.0-temp));
if (rez < 0.0005) rez = 0.0005;
double bitFactor = pow(2.0,bit);
double dry = 2.0 - wet;
if (wet > 1.0) wet = 1.0;
if (wet < 0.0) wet = 0.0;
if (dry > 1.0) dry = 1.0;
if (dry < 0.0) dry = 0.0;
//this bitcrush makes 50% full dry AND full wet, not crossfaded.
//that's so it can be on tracks without cutting back dry channel when adjusted
inputSampleL *= bitFactor;
inputSampleL = floor(inputSampleL+(0.5/bitFactor));
inputSampleL /= bitFactor;
inputSampleR *= bitFactor;
inputSampleR = floor(inputSampleR+(0.5/bitFactor));
inputSampleR /= bitFactor;
bez[bez_cycle] += rez;
bez[bez_SampL] += (inputSampleL * rez);
bez[bez_SampR] += (inputSampleR * rez);
if (bez[bez_cycle] > 1.0) {
bez[bez_cycle] -= 1.0;
bez[bez_CL] = bez[bez_BL];
bez[bez_BL] = bez[bez_AL];
bez[bez_AL] = inputSampleL;
bez[bez_SampL] = 0.0;
bez[bez_CR] = bez[bez_BR];
bez[bez_BR] = bez[bez_AR];
bez[bez_AR] = inputSampleR;
bez[bez_SampR] = 0.0;
}
double CBL = (bez[bez_CL]*(1.0-bez[bez_cycle]))+(bez[bez_BL]*bez[bez_cycle]);
double CBR = (bez[bez_CR]*(1.0-bez[bez_cycle]))+(bez[bez_BR]*bez[bez_cycle]);
double BAL = (bez[bez_BL]*(1.0-bez[bez_cycle]))+(bez[bez_AL]*bez[bez_cycle]);
double BAR = (bez[bez_BR]*(1.0-bez[bez_cycle]))+(bez[bez_AR]*bez[bez_cycle]);
double CBAL = (bez[bez_BL]+(CBL*(1.0-bez[bez_cycle]))+(BAL*bez[bez_cycle]))*0.5;
double CBAR = (bez[bez_BR]+(CBR*(1.0-bez[bez_cycle]))+(BAR*bez[bez_cycle]))*0.5;
inputSampleL = (wet*CBAL)+(dry*drySampleL);
inputSampleR = (wet*CBAR)+(dry*drySampleR);
//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++;
}
}