/* ========================================
* Holt - Holt.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Holt_H
#include "Holt.h"
#endif
void Holt::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double alpha = pow(A,4)+0.00001;
if (alpha > 1.0) alpha = 1.0;
double beta = (alpha * pow(B,2))+0.00001;
alpha += ((1.0-beta)*pow(A,3)); //correct for droop in frequency
if (alpha > 1.0) alpha = 1.0;
long double trend;
long double forecast; //defining these here because we're copying the routine four times
double aWet = 1.0;
double bWet = 1.0;
double cWet = 1.0;
double dWet = C*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//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)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
static int noisesourceL = 0;
static int noisesourceR = 850010;
int residue;
double applyresidue;
noisesourceL = noisesourceL % 1700021; noisesourceL++;
residue = noisesourceL * noisesourceL;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL += applyresidue;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
inputSampleL -= applyresidue;
}
noisesourceR = noisesourceR % 1700021; noisesourceR++;
residue = noisesourceR * noisesourceR;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR += applyresidue;
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
inputSampleR -= applyresidue;
}
//for live air, we always apply the dither noise. Then, if our result is
//effectively digital black, we'll subtract it again. We want a 'air' hiss
long double drySampleL = inputSampleL;
long 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 (gain < 1.0) {
inputSampleL *= gain;
inputSampleR *= gain;
}
//clip to 1.2533141373155 to reach maximum output
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((inputSampleL == 0.0) ?1:fabs(inputSampleL));
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((inputSampleR == 0.0) ?1:fabs(inputSampleR));
if (wet < 1.0) {
inputSampleL = (inputSampleL*wet)+(drySampleL*(1.0-wet));
inputSampleR = (inputSampleR*wet)+(drySampleR*(1.0-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 Holt::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double alpha = pow(A,4)+0.00001;
if (alpha > 1.0) alpha = 1.0;
double beta = (alpha * pow(B,2))+0.00001;
alpha += ((1.0-beta)*pow(A,3)); //correct for droop in frequency
if (alpha > 1.0) alpha = 1.0;
long double trend;
long double forecast; //defining these here because we're copying the routine four times
double aWet = 1.0;
double bWet = 1.0;
double cWet = 1.0;
double dWet = C*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//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)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
static int noisesourceL = 0;
static int noisesourceR = 850010;
int residue;
double applyresidue;
noisesourceL = noisesourceL % 1700021; noisesourceL++;
residue = noisesourceL * noisesourceL;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL += applyresidue;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
inputSampleL -= applyresidue;
}
noisesourceR = noisesourceR % 1700021; noisesourceR++;
residue = noisesourceR * noisesourceR;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR += applyresidue;
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
inputSampleR -= applyresidue;
}
//for live air, we always apply the dither noise. Then, if our result is
//effectively digital black, we'll subtract it again. We want a 'air' hiss
long double drySampleL = inputSampleL;
long 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 (gain < 1.0) {
inputSampleL *= gain;
inputSampleR *= gain;
}
//clip to 1.2533141373155 to reach maximum output
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((inputSampleL == 0.0) ?1:fabs(inputSampleL));
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((inputSampleR == 0.0) ?1:fabs(inputSampleR));
if (wet < 1.0) {
inputSampleL = (inputSampleL*wet)+(drySampleL*(1.0-wet));
inputSampleR = (inputSampleR*wet)+(drySampleR*(1.0-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++;
}
}
