/* ========================================
* Point - Point.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Point_H
#include "Point.h"
#endif
void Point::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 gaintrim = pow(10.0,((A*24.0)-12.0)/20);
double nibDiv = 1 / pow(C+0.2,7);
nibDiv /= overallscale;
double nobDiv;
if (((B*2.0)-1.0) > 0) nobDiv = nibDiv / (1.001-((B*2.0)-1.0));
else nobDiv = nibDiv * (1.001-pow(((B*2.0)-1.0)*0.75,2));
double nibnobFactor = 0.0; //start with the fallthrough value, why not
double absolute;
long double inputSampleL;
long double inputSampleR;
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.
}
inputSampleL *= gaintrim;
absolute = fabs(inputSampleL);
if (fpFlip)
{
nibAL = nibAL + (absolute / nibDiv);
nibAL = nibAL / (1 + (1/nibDiv));
nobAL = nobAL + (absolute / nobDiv);
nobAL = nobAL / (1 + (1/nobDiv));
if (nobAL > 0)
{
nibnobFactor = nibAL / nobAL;
}
}
else
{
nibBL = nibBL + (absolute / nibDiv);
nibBL = nibBL / (1 + (1/nibDiv));
nobBL = nobBL + (absolute / nobDiv);
nobBL = nobBL / (1 + (1/nobDiv));
if (nobBL > 0)
{
nibnobFactor = nibBL / nobBL;
}
}
inputSampleL *= nibnobFactor;
inputSampleR *= gaintrim;
absolute = fabs(inputSampleR);
if (fpFlip)
{
nibAR = nibAR + (absolute / nibDiv);
nibAR = nibAR / (1 + (1/nibDiv));
nobAR = nobAR + (absolute / nobDiv);
nobAR = nobAR / (1 + (1/nobDiv));
if (nobAR > 0)
{
nibnobFactor = nibAR / nobAR;
}
}
else
{
nibBR = nibBR + (absolute / nibDiv);
nibBR = nibBR / (1 + (1/nibDiv));
nobBR = nobBR + (absolute / nobDiv);
nobBR = nobBR / (1 + (1/nobDiv));
if (nobBR > 0)
{
nibnobFactor = nibBR / nobBR;
}
}
inputSampleR *= nibnobFactor;
fpFlip = !fpFlip;
//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 Point::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 gaintrim = pow(10.0,((A*24.0)-12.0)/20);
double nibDiv = 1 / pow(C+0.2,7);
nibDiv /= overallscale;
double nobDiv;
if (((B*2.0)-1.0) > 0) nobDiv = nibDiv / (1.001-((B*2.0)-1.0));
else nobDiv = nibDiv * (1.001-pow(((B*2.0)-1.0)*0.75,2));
double nibnobFactor = 0.0; //start with the fallthrough value, why not
double absolute;
long double inputSampleL;
long double inputSampleR;
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.
}
inputSampleL *= gaintrim;
absolute = fabs(inputSampleL);
if (fpFlip)
{
nibAL = nibAL + (absolute / nibDiv);
nibAL = nibAL / (1 + (1/nibDiv));
nobAL = nobAL + (absolute / nobDiv);
nobAL = nobAL / (1 + (1/nobDiv));
if (nobAL > 0)
{
nibnobFactor = nibAL / nobAL;
}
}
else
{
nibBL = nibBL + (absolute / nibDiv);
nibBL = nibBL / (1 + (1/nibDiv));
nobBL = nobBL + (absolute / nobDiv);
nobBL = nobBL / (1 + (1/nobDiv));
if (nobBL > 0)
{
nibnobFactor = nibBL / nobBL;
}
}
inputSampleL *= nibnobFactor;
inputSampleR *= gaintrim;
absolute = fabs(inputSampleR);
if (fpFlip)
{
nibAR = nibAR + (absolute / nibDiv);
nibAR = nibAR / (1 + (1/nibDiv));
nobAR = nobAR + (absolute / nobDiv);
nobAR = nobAR / (1 + (1/nobDiv));
if (nobAR > 0)
{
nibnobFactor = nibAR / nobAR;
}
}
else
{
nibBR = nibBR + (absolute / nibDiv);
nibBR = nibBR / (1 + (1/nibDiv));
nobBR = nobBR + (absolute / nobDiv);
nobBR = nobBR / (1 + (1/nobDiv));
if (nobBR > 0)
{
nibnobFactor = nibBR / nobBR;
}
}
inputSampleR *= nibnobFactor;
fpFlip = !fpFlip;
//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++;
}
}
