/* ========================================
* Surge - Surge.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Surge_H
#include "Surge.h"
#endif
void Surge::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();
long double inputSampleL;
long double inputSampleR;
long double drySampleL;
long double drySampleR;
double chaseMax = 0.0;
double intensity = (1.0-(pow((1.0-A),2)))*0.7;
double attack = ((intensity+0.1)*0.0005)/overallscale;
double decay = ((intensity+0.001)*0.00005)/overallscale;
double wet = B;
double dry = 1.0 - wet;
double inputSense;
while (--sampleFrames >= 0)
{
inputSampleL = *in1;
inputSampleR = *in2;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL = applyresidue;
}
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
static int noisesource = 0;
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
drySampleL = inputSampleL;
drySampleR = inputSampleR;
inputSampleL *= 8.0;
inputSampleR *= 8.0;
inputSampleL *= intensity;
inputSampleR *= intensity;
inputSense = fabs(inputSampleL);
if (fabs(inputSampleR) > inputSense)
inputSense = fabs(inputSampleR);
if (chaseMax < inputSense) chaseA += attack;
if (chaseMax > inputSense) chaseA -= decay;
if (chaseA > decay) chaseA = decay;
if (chaseA < -attack) chaseA = -attack;
chaseB += (chaseA/overallscale);
if (chaseB > decay) chaseB = decay;
if (chaseB < -attack) chaseB = -attack;
chaseC += (chaseB/overallscale);
if (chaseC > decay) chaseC = decay;
if (chaseC < -attack) chaseC = -attack;
chaseD += (chaseC/overallscale);
if (chaseD > 1.0) chaseD = 1.0;
if (chaseD < 0.0) chaseD = 0.0;
chaseMax = chaseA;
if (chaseMax < chaseB) chaseMax = chaseB;
if (chaseMax < chaseC) chaseMax = chaseC;
if (chaseMax < chaseD) chaseMax = chaseD;
inputSampleL *= chaseMax;
inputSampleL = drySampleL - (inputSampleL * intensity);
inputSampleL = (drySampleL * dry) + (inputSampleL * wet);
inputSampleR *= chaseMax;
inputSampleR = drySampleR - (inputSampleR * intensity);
inputSampleR = (drySampleR * dry) + (inputSampleR * 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 Surge::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();
long double inputSampleL;
long double inputSampleR;
long double drySampleL;
long double drySampleR;
double chaseMax = 0.0;
double intensity = (1.0-(pow((1.0-A),2)))*0.7;
double attack = ((intensity+0.1)*0.0005)/overallscale;
double decay = ((intensity+0.001)*0.00005)/overallscale;
double wet = B;
double dry = 1.0 - wet;
double inputSense;
while (--sampleFrames >= 0)
{
inputSampleL = *in1;
inputSampleR = *in2;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL = applyresidue;
}
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
static int noisesource = 0;
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
drySampleL = inputSampleL;
drySampleR = inputSampleR;
inputSampleL *= 8.0;
inputSampleR *= 8.0;
inputSampleL *= intensity;
inputSampleR *= intensity;
inputSense = fabs(inputSampleL);
if (fabs(inputSampleR) > inputSense)
inputSense = fabs(inputSampleR);
if (chaseMax < inputSense) chaseA += attack;
if (chaseMax > inputSense) chaseA -= decay;
if (chaseA > decay) chaseA = decay;
if (chaseA < -attack) chaseA = -attack;
chaseB += (chaseA/overallscale);
if (chaseB > decay) chaseB = decay;
if (chaseB < -attack) chaseB = -attack;
chaseC += (chaseB/overallscale);
if (chaseC > decay) chaseC = decay;
if (chaseC < -attack) chaseC = -attack;
chaseD += (chaseC/overallscale);
if (chaseD > 1.0) chaseD = 1.0;
if (chaseD < 0.0) chaseD = 0.0;
chaseMax = chaseA;
if (chaseMax < chaseB) chaseMax = chaseB;
if (chaseMax < chaseC) chaseMax = chaseC;
if (chaseMax < chaseD) chaseMax = chaseD;
inputSampleL *= chaseMax;
inputSampleL = drySampleL - (inputSampleL * intensity);
inputSampleL = (drySampleL * dry) + (inputSampleL * wet);
inputSampleR *= chaseMax;
inputSampleR = drySampleR - (inputSampleR * intensity);
inputSampleR = (drySampleR * dry) + (inputSampleR * 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++;
}
}
