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airwindows/plugins/MacVST/Holt2/source/Holt2Proc.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/* ========================================
* Holt2 - Holt2.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __Holt2_H
#include "Holt2.h"
#endif
void Holt2::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 alpha = pow(A,4)+0.00001;
if (alpha > 1.0) alpha = 1.0;
double resControl = (B*0.15)+0.12;
double beta = (alpha * pow(resControl,2));
//0.27 max resonance for full stages on white noise keeping below 0dB
//0.12 min resonance for not losing all the level as we go down
//as we remove the 'avoid zero' +0.00001 on beta, our subsonic stability improves
alpha += ((1.0-beta)*pow(A,3)); //correct for droop in frequency
if (alpha > 1.0) alpha = 1.0;
double trend;
double forecast; //defining these here because we're copying the routine eight times
double aWet = 0.0;
double bWet = 0.0;
double cWet = 0.0;
double dWet = 0.0;
double eWet = 0.0;
double fWet = 0.0;
double gWet = 0.0;
double hWet = C*8.0;
//eight-stage wet/dry control using progressive stages that bypass when not engaged
if (hWet < 1.0) {aWet = hWet; hWet = 0.0;}
else if (hWet < 2.0) {bWet = hWet - 1.0; aWet = 1.0; hWet = 0.0;}
else if (hWet < 3.0) {cWet = hWet - 2.0; bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 4.0) {dWet = hWet - 3.0; cWet = bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 5.0) {eWet = hWet - 4.0; dWet = cWet = bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 6.0) {fWet = hWet - 5.0; eWet = dWet = cWet = bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 7.0) {gWet = hWet - 6.0; fWet = eWet = dWet = cWet = bWet = aWet = 1.0; hWet = 0.0;}
else {hWet -= 7.0; gWet = fWet = eWet = dWet = cWet = bWet = aWet = 1.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
double gain = D;
double wet = E;
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;
if (aWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleAL) + ((0.999-beta) * previousTrendAL));
forecast = previousSampleAL + previousTrendAL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleAL = inputSampleL; previousTrendAL = trend;
inputSampleL = (inputSampleL * aWet) + (drySampleL * (1.0-aWet));
trend = (beta * (inputSampleR - previousSampleAR) + ((0.999-beta) * previousTrendAR));
forecast = previousSampleAR + previousTrendAR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleAR = inputSampleR; previousTrendAR = trend;
inputSampleR = (inputSampleR * aWet) + (drySampleR * (1.0-aWet));
}
if (bWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleBL) + ((0.999-beta) * previousTrendBL));
forecast = previousSampleBL + previousTrendBL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleBL = inputSampleL; previousTrendBL = trend;
inputSampleL = (inputSampleL * bWet) + (previousSampleAL * (1.0-bWet));
trend = (beta * (inputSampleR - previousSampleBR) + ((0.999-beta) * previousTrendBR));
forecast = previousSampleBR + previousTrendBR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleBR = inputSampleR; previousTrendBR = trend;
inputSampleR = (inputSampleR * bWet) + (previousSampleAR * (1.0-bWet));
}
if (cWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleCL) + ((0.999-beta) * previousTrendCL));
forecast = previousSampleCL + previousTrendCL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleCL = inputSampleL; previousTrendCL = trend;
inputSampleL = (inputSampleL * cWet) + (previousSampleBL * (1.0-cWet));
trend = (beta * (inputSampleR - previousSampleCR) + ((0.999-beta) * previousTrendCR));
forecast = previousSampleCR + previousTrendCR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleCR = inputSampleR; previousTrendCR = trend;
inputSampleR = (inputSampleR * cWet) + (previousSampleBR * (1.0-cWet));
}
if (dWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleDL) + ((0.999-beta) * previousTrendDL));
forecast = previousSampleDL + previousTrendDL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleDL = inputSampleL; previousTrendDL = trend;
inputSampleL = (inputSampleL * dWet) + (previousSampleCL * (1.0-dWet));
trend = (beta * (inputSampleR - previousSampleDR) + ((0.999-beta) * previousTrendDR));
forecast = previousSampleDR + previousTrendDR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleDR = inputSampleR; previousTrendDR = trend;
inputSampleR = (inputSampleR * dWet) + (previousSampleCR * (1.0-dWet));
}
if (eWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleEL) + ((0.999-beta) * previousTrendEL));
forecast = previousSampleEL + previousTrendEL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleEL = inputSampleL; previousTrendEL = trend;
inputSampleL = (inputSampleL * eWet) + (previousSampleDL * (1.0-eWet));
trend = (beta * (inputSampleR - previousSampleER) + ((0.999-beta) * previousTrendER));
forecast = previousSampleER + previousTrendER;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleER = inputSampleR; previousTrendER = trend;
inputSampleR = (inputSampleR * eWet) + (previousSampleDR * (1.0-eWet));
}
if (fWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleFL) + ((0.999-beta) * previousTrendFL));
forecast = previousSampleFL + previousTrendFL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleFL = inputSampleL; previousTrendFL = trend;
inputSampleL = (inputSampleL * fWet) + (previousSampleEL * (1.0-fWet));
trend = (beta * (inputSampleR - previousSampleFR) + ((0.999-beta) * previousTrendFR));
forecast = previousSampleFR + previousTrendFR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleFR = inputSampleR; previousTrendFR = trend;
inputSampleR = (inputSampleR * fWet) + (previousSampleER * (1.0-fWet));
}
if (gWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleGL) + ((0.999-beta) * previousTrendGL));
forecast = previousSampleGL + previousTrendGL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleGL = inputSampleL; previousTrendGL = trend;
inputSampleL = (inputSampleL * gWet) + (previousSampleFL * (1.0-gWet));
trend = (beta * (inputSampleR - previousSampleGR) + ((0.999-beta) * previousTrendGR));
forecast = previousSampleGR + previousTrendGR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleGR = inputSampleR; previousTrendGR = trend;
inputSampleR = (inputSampleR * gWet) + (previousSampleFR * (1.0-gWet));
}
if (hWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleHL) + ((0.999-beta) * previousTrendHL));
forecast = previousSampleHL + previousTrendHL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleHL = inputSampleL; previousTrendHL = trend;
inputSampleL = (inputSampleL * hWet) + (previousSampleGL * (1.0-hWet));
trend = (beta * (inputSampleR - previousSampleHR) + ((0.999-beta) * previousTrendHR));
forecast = previousSampleHR + previousTrendHR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleHR = inputSampleR; previousTrendHR = trend;
inputSampleR = (inputSampleR * hWet) + (previousSampleGR * (1.0-hWet));
}
if (gain < 1.0) {
inputSampleL *= gain;
inputSampleR *= gain;
}
if (wet < 1.0) {
inputSampleL = (inputSampleL*wet)+(drySampleL*(1.0-wet));
inputSampleR = (inputSampleR*wet)+(drySampleR*(1.0-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 Holt2::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 alpha = pow(A,4)+0.00001;
if (alpha > 1.0) alpha = 1.0;
double resControl = (B*0.15)+0.12;
double beta = (alpha * pow(resControl,2));
//0.27 max resonance for full stages on white noise keeping below 0dB
//0.12 min resonance for not losing all the level as we go down
//as we remove the 'avoid zero' +0.00001 on beta, our subsonic stability improves
alpha += ((1.0-beta)*pow(A,3)); //correct for droop in frequency
if (alpha > 1.0) alpha = 1.0;
double trend;
double forecast; //defining these here because we're copying the routine eight times
double aWet = 0.0;
double bWet = 0.0;
double cWet = 0.0;
double dWet = 0.0;
double eWet = 0.0;
double fWet = 0.0;
double gWet = 0.0;
double hWet = C*8.0;
//eight-stage wet/dry control using progressive stages that bypass when not engaged
if (hWet < 1.0) {aWet = hWet; hWet = 0.0;}
else if (hWet < 2.0) {bWet = hWet - 1.0; aWet = 1.0; hWet = 0.0;}
else if (hWet < 3.0) {cWet = hWet - 2.0; bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 4.0) {dWet = hWet - 3.0; cWet = bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 5.0) {eWet = hWet - 4.0; dWet = cWet = bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 6.0) {fWet = hWet - 5.0; eWet = dWet = cWet = bWet = aWet = 1.0; hWet = 0.0;}
else if (hWet < 7.0) {gWet = hWet - 6.0; fWet = eWet = dWet = cWet = bWet = aWet = 1.0; hWet = 0.0;}
else {hWet -= 7.0; gWet = fWet = eWet = dWet = cWet = bWet = aWet = 1.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
double gain = D;
double wet = E;
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;
if (aWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleAL) + ((0.999-beta) * previousTrendAL));
forecast = previousSampleAL + previousTrendAL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleAL = inputSampleL; previousTrendAL = trend;
inputSampleL = (inputSampleL * aWet) + (drySampleL * (1.0-aWet));
trend = (beta * (inputSampleR - previousSampleAR) + ((0.999-beta) * previousTrendAR));
forecast = previousSampleAR + previousTrendAR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleAR = inputSampleR; previousTrendAR = trend;
inputSampleR = (inputSampleR * aWet) + (drySampleR * (1.0-aWet));
}
if (bWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleBL) + ((0.999-beta) * previousTrendBL));
forecast = previousSampleBL + previousTrendBL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleBL = inputSampleL; previousTrendBL = trend;
inputSampleL = (inputSampleL * bWet) + (previousSampleAL * (1.0-bWet));
trend = (beta * (inputSampleR - previousSampleBR) + ((0.999-beta) * previousTrendBR));
forecast = previousSampleBR + previousTrendBR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleBR = inputSampleR; previousTrendBR = trend;
inputSampleR = (inputSampleR * bWet) + (previousSampleAR * (1.0-bWet));
}
if (cWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleCL) + ((0.999-beta) * previousTrendCL));
forecast = previousSampleCL + previousTrendCL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleCL = inputSampleL; previousTrendCL = trend;
inputSampleL = (inputSampleL * cWet) + (previousSampleBL * (1.0-cWet));
trend = (beta * (inputSampleR - previousSampleCR) + ((0.999-beta) * previousTrendCR));
forecast = previousSampleCR + previousTrendCR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleCR = inputSampleR; previousTrendCR = trend;
inputSampleR = (inputSampleR * cWet) + (previousSampleBR * (1.0-cWet));
}
if (dWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleDL) + ((0.999-beta) * previousTrendDL));
forecast = previousSampleDL + previousTrendDL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleDL = inputSampleL; previousTrendDL = trend;
inputSampleL = (inputSampleL * dWet) + (previousSampleCL * (1.0-dWet));
trend = (beta * (inputSampleR - previousSampleDR) + ((0.999-beta) * previousTrendDR));
forecast = previousSampleDR + previousTrendDR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleDR = inputSampleR; previousTrendDR = trend;
inputSampleR = (inputSampleR * dWet) + (previousSampleCR * (1.0-dWet));
}
if (eWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleEL) + ((0.999-beta) * previousTrendEL));
forecast = previousSampleEL + previousTrendEL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleEL = inputSampleL; previousTrendEL = trend;
inputSampleL = (inputSampleL * eWet) + (previousSampleDL * (1.0-eWet));
trend = (beta * (inputSampleR - previousSampleER) + ((0.999-beta) * previousTrendER));
forecast = previousSampleER + previousTrendER;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleER = inputSampleR; previousTrendER = trend;
inputSampleR = (inputSampleR * eWet) + (previousSampleDR * (1.0-eWet));
}
if (fWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleFL) + ((0.999-beta) * previousTrendFL));
forecast = previousSampleFL + previousTrendFL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleFL = inputSampleL; previousTrendFL = trend;
inputSampleL = (inputSampleL * fWet) + (previousSampleEL * (1.0-fWet));
trend = (beta * (inputSampleR - previousSampleFR) + ((0.999-beta) * previousTrendFR));
forecast = previousSampleFR + previousTrendFR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleFR = inputSampleR; previousTrendFR = trend;
inputSampleR = (inputSampleR * fWet) + (previousSampleER * (1.0-fWet));
}
if (gWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleGL) + ((0.999-beta) * previousTrendGL));
forecast = previousSampleGL + previousTrendGL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleGL = inputSampleL; previousTrendGL = trend;
inputSampleL = (inputSampleL * gWet) + (previousSampleFL * (1.0-gWet));
trend = (beta * (inputSampleR - previousSampleGR) + ((0.999-beta) * previousTrendGR));
forecast = previousSampleGR + previousTrendGR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleGR = inputSampleR; previousTrendGR = trend;
inputSampleR = (inputSampleR * gWet) + (previousSampleFR * (1.0-gWet));
}
if (hWet > 0.0) {
trend = (beta * (inputSampleL - previousSampleHL) + ((0.999-beta) * previousTrendHL));
forecast = previousSampleHL + previousTrendHL;
inputSampleL = (alpha * inputSampleL) + ((0.999-alpha) * forecast);
previousSampleHL = inputSampleL; previousTrendHL = trend;
inputSampleL = (inputSampleL * hWet) + (previousSampleGL * (1.0-hWet));
trend = (beta * (inputSampleR - previousSampleHR) + ((0.999-beta) * previousTrendHR));
forecast = previousSampleHR + previousTrendHR;
inputSampleR = (alpha * inputSampleR) + ((0.999-alpha) * forecast);
previousSampleHR = inputSampleR; previousTrendHR = trend;
inputSampleR = (inputSampleR * hWet) + (previousSampleGR * (1.0-hWet));
}
if (gain < 1.0) {
inputSampleL *= gain;
inputSampleR *= gain;
}
if (wet < 1.0) {
inputSampleL = (inputSampleL*wet)+(drySampleL*(1.0-wet));
inputSampleR = (inputSampleR*wet)+(drySampleR*(1.0-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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