/* ========================================
* Density - Density.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Density_H
#include "Density.h"
#endif
void Density::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 density = (A*5.0)-1.0;
double iirAmount = pow(B,3)/overallscale;
double output = C;
double wet = D;
double dry = 1.0-wet;
double bridgerectifier;
double out = fabs(density);
density = density * fabs(density);
double count;
long double inputSampleL;
long double inputSampleR;
long double drySampleL;
long double drySampleR;
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;
if (fpFlip)
{
iirSampleAL = (iirSampleAL * (1.0 - iirAmount)) + (inputSampleL * iirAmount);
inputSampleL -= iirSampleAL;
iirSampleAR = (iirSampleAR * (1.0 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleR -= iirSampleAR;
}
else
{
iirSampleBL = (iirSampleBL * (1.0 - iirAmount)) + (inputSampleL * iirAmount);
inputSampleL -= iirSampleBL;
iirSampleBR = (iirSampleBR * (1.0 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleR -= iirSampleBR;
}
//highpass section
fpFlip = !fpFlip;
count = density;
while (count > 1.0)
{
bridgerectifier = fabs(inputSampleL)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
bridgerectifier = sin(bridgerectifier);
if (inputSampleL > 0.0) inputSampleL = bridgerectifier;
else inputSampleL = -bridgerectifier;
bridgerectifier = fabs(inputSampleR)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
bridgerectifier = sin(bridgerectifier);
if (inputSampleR > 0.0) inputSampleR = bridgerectifier;
else inputSampleR = -bridgerectifier;
count = count - 1.0;
}
//we have now accounted for any really high density settings.
while (out > 1.0) out = out - 1.0;
bridgerectifier = fabs(inputSampleL)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (density > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-out))+(bridgerectifier*out);
else inputSampleL = (inputSampleL*(1-out))-(bridgerectifier*out);
//blend according to density control
bridgerectifier = fabs(inputSampleR)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (density > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSampleR > 0) inputSampleR = (inputSampleR*(1.0-out))+(bridgerectifier*out);
else inputSampleR = (inputSampleR*(1.0-out))-(bridgerectifier*out);
//blend according to density control
if (output < 1.0) {
inputSampleL *= output;
inputSampleR *= output;
}
if (wet < 1.0) {
inputSampleL = (drySampleL * dry)+(inputSampleL * wet);
inputSampleR = (drySampleR * dry)+(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.
//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 Density::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 density = (A*5.0)-1.0;
double iirAmount = pow(B,3)/overallscale;
double output = C;
double wet = D;
double dry = 1.0-wet;
double bridgerectifier;
double out = fabs(density);
density = density * fabs(density);
double count;
long double inputSampleL;
long double inputSampleR;
long double drySampleL;
long double drySampleR;
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;
if (fpFlip)
{
iirSampleAL = (iirSampleAL * (1.0 - iirAmount)) + (inputSampleL * iirAmount);
inputSampleL -= iirSampleAL;
iirSampleAR = (iirSampleAR * (1.0 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleR -= iirSampleAR;
}
else
{
iirSampleBL = (iirSampleBL * (1.0 - iirAmount)) + (inputSampleL * iirAmount);
inputSampleL -= iirSampleBL;
iirSampleBR = (iirSampleBR * (1.0 - iirAmount)) + (inputSampleR * iirAmount);
inputSampleR -= iirSampleBR;
}
//highpass section
fpFlip = !fpFlip;
count = density;
while (count > 1.0)
{
bridgerectifier = fabs(inputSampleL)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
bridgerectifier = sin(bridgerectifier);
if (inputSampleL > 0.0) inputSampleL = bridgerectifier;
else inputSampleL = -bridgerectifier;
bridgerectifier = fabs(inputSampleR)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
bridgerectifier = sin(bridgerectifier);
if (inputSampleR > 0.0) inputSampleR = bridgerectifier;
else inputSampleR = -bridgerectifier;
count = count - 1.0;
}
//we have now accounted for any really high density settings.
while (out > 1.0) out = out - 1.0;
bridgerectifier = fabs(inputSampleL)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (density > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-out))+(bridgerectifier*out);
else inputSampleL = (inputSampleL*(1-out))-(bridgerectifier*out);
//blend according to density control
bridgerectifier = fabs(inputSampleR)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (density > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSampleR > 0) inputSampleR = (inputSampleR*(1.0-out))+(bridgerectifier*out);
else inputSampleR = (inputSampleR*(1.0-out))-(bridgerectifier*out);
//blend according to density control
if (output < 1.0) {
inputSampleL *= output;
inputSampleR *= output;
}
if (wet < 1.0) {
inputSampleL = (drySampleL * dry)+(inputSampleL * wet);
inputSampleR = (drySampleR * dry)+(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.
//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++;
}
}
