/* ========================================
* Spiral2 - Spiral2.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Spiral2_H
#include "Spiral2.h"
#endif
void Spiral2::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 gain = pow(A*2.0,2.0);
double iirAmount = pow(B,3.0)/overallscale;
double presence = C;
double output = 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 aSpiral2. We want a 'air' hiss
long double drySampleL = inputSampleL;
long double drySampleR = inputSampleR;
if (gain != 1.0) {
inputSampleL *= gain;
inputSampleR *= gain;
prevSampleL *= gain;
prevSampleR *= gain;
}
if (flip)
{
iirSampleAL = (iirSampleAL * (1 - iirAmount)) + (inputSampleL * iirAmount);
iirSampleAR = (iirSampleAR * (1 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleL -= iirSampleAL;
inputSampleR -= iirSampleAR;
}
else
{
iirSampleBL = (iirSampleBL * (1 - iirAmount)) + (inputSampleL * iirAmount);
iirSampleBR = (iirSampleBR * (1 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleL -= iirSampleBL;
inputSampleR -= iirSampleBR;
}
//highpass section
long double presenceSampleL = sin(inputSampleL * fabs(prevSampleL)) / ((prevSampleL == 0.0) ?1:fabs(prevSampleL));
long double presenceSampleR = sin(inputSampleR * fabs(prevSampleR)) / ((prevSampleR == 0.0) ?1:fabs(prevSampleR));
//change from first Spiral: delay of one sample on the scaling factor.
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((inputSampleL == 0.0) ?1:fabs(inputSampleL));
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((inputSampleR == 0.0) ?1:fabs(inputSampleR));
if (output < 1.0) {
inputSampleL *= output;
inputSampleR *= output;
presenceSampleL *= output;
presenceSampleR *= output;
}
if (presence > 0.0) {
inputSampleL = (inputSampleL * (1.0-presence)) + (presenceSampleL * presence);
inputSampleR = (inputSampleR * (1.0-presence)) + (presenceSampleR * presence);
}
if (wet < 1.0) {
inputSampleL = (drySampleL * (1.0-wet)) + (inputSampleL * wet);
inputSampleR = (drySampleR * (1.0-wet)) + (inputSampleR * wet);
}
//nice little output stage template: if we have another scale of floating point
//number, we really don't want to meaninglessly multiply that by 1.0.
prevSampleL = drySampleL;
prevSampleR = drySampleR;
flip = !flip;
//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 Spiral2::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 gain = pow(A*2.0,2.0);
double iirAmount = pow(B,3.0)/overallscale;
double presence = C;
double output = 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 aSpiral2. We want a 'air' hiss
long double drySampleL = inputSampleL;
long double drySampleR = inputSampleR;
if (gain != 1.0) {
inputSampleL *= gain;
inputSampleR *= gain;
prevSampleL *= gain;
prevSampleR *= gain;
}
if (flip)
{
iirSampleAL = (iirSampleAL * (1 - iirAmount)) + (inputSampleL * iirAmount);
iirSampleAR = (iirSampleAR * (1 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleL -= iirSampleAL;
inputSampleR -= iirSampleAR;
}
else
{
iirSampleBL = (iirSampleBL * (1 - iirAmount)) + (inputSampleL * iirAmount);
iirSampleBR = (iirSampleBR * (1 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleL -= iirSampleBL;
inputSampleR -= iirSampleBR;
}
//highpass section
long double presenceSampleL = sin(inputSampleL * fabs(prevSampleL)) / ((prevSampleL == 0.0) ?1:fabs(prevSampleL));
long double presenceSampleR = sin(inputSampleR * fabs(prevSampleR)) / ((prevSampleR == 0.0) ?1:fabs(prevSampleR));
//change from first Spiral: delay of one sample on the scaling factor.
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((inputSampleL == 0.0) ?1:fabs(inputSampleL));
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((inputSampleR == 0.0) ?1:fabs(inputSampleR));
if (output < 1.0) {
inputSampleL *= output;
inputSampleR *= output;
presenceSampleL *= output;
presenceSampleR *= output;
}
if (presence > 0.0) {
inputSampleL = (inputSampleL * (1.0-presence)) + (presenceSampleL * presence);
inputSampleR = (inputSampleR * (1.0-presence)) + (presenceSampleR * presence);
}
if (wet < 1.0) {
inputSampleL = (drySampleL * (1.0-wet)) + (inputSampleL * wet);
inputSampleR = (drySampleR * (1.0-wet)) + (inputSampleR * wet);
}
//nice little output stage template: if we have another scale of floating point
//number, we really don't want to meaninglessly multiply that by 1.0.
prevSampleL = drySampleL;
prevSampleR = drySampleR;
flip = !flip;
//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++;
}
}
