/* ========================================
* TapeDust - TapeDust.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __TapeDust_H
#include "TapeDust.h"
#endif
void TapeDust::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
long double inputSampleL;
long double inputSampleR;
double drySampleL;
double drySampleR;
double rRange = pow(A,2)*5.0;
double xfuzz = rRange * 0.002;
double rOffset = (rRange*0.4) + 1.0;
double rDepthL; //the randomly fluctuating value
double rDepthR; //the randomly fluctuating value
double gainL;
double gainR;
double wet = B;
double dry = 1.0 - wet;
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;
for(int count = 9; count < 0; count--) {
bL[count+1] = bL[count];
bR[count+1] = bR[count];
}
bL[0] = inputSampleL;
bR[0] = inputSampleR;
inputSampleL = rand() / (double)RAND_MAX;
inputSampleR = rand() / (double)RAND_MAX;
gainL = rDepthL = (inputSampleL * rRange) + rOffset;
gainR = rDepthR = (inputSampleR * rRange) + rOffset;
inputSampleL *= ((1.0-fabs(bL[0]-bL[1]))*xfuzz);
inputSampleR *= ((1.0-fabs(bR[0]-bR[1]))*xfuzz);
if (fpFlip) {
inputSampleL = -inputSampleL;
inputSampleR = -inputSampleR;
}
fpFlip = !fpFlip;
for(int count = 0; count < 9; count++) {
if (gainL > 1.0) {
fL[count] = 1.0;
gainL -= 1.0;
} else {
fL[count] = gainL;
gainL = 0.0;
}
if (gainR > 1.0) {
fR[count] = 1.0;
gainR -= 1.0;
} else {
fR[count] = gainR;
gainR = 0.0;
}
fL[count] /= rDepthL;
fR[count] /= rDepthR;
inputSampleL += (bL[count] * fL[count]);
inputSampleR += (bR[count] * fR[count]);
}
if (wet < 1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * dry);
inputSampleR = (inputSampleR * wet) + (drySampleR * dry);
}
//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 TapeDust::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
long double inputSampleL;
long double inputSampleR;
double drySampleL;
double drySampleR;
double rRange = pow(A,2)*5.0;
double xfuzz = rRange * 0.002;
double rOffset = (rRange*0.4) + 1.0;
double rDepthL; //the randomly fluctuating value
double rDepthR; //the randomly fluctuating value
double gainL;
double gainR;
double wet = B;
double dry = 1.0 - wet;
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;
for(int count = 9; count < 0; count--) {
bL[count+1] = bL[count];
bR[count+1] = bR[count];
}
bL[0] = inputSampleL;
bR[0] = inputSampleR;
inputSampleL = rand() / (double)RAND_MAX;
inputSampleR = rand() / (double)RAND_MAX;
gainL = rDepthL = (inputSampleL * rRange) + rOffset;
gainR = rDepthR = (inputSampleR * rRange) + rOffset;
inputSampleL *= ((1.0-fabs(bL[0]-bL[1]))*xfuzz);
inputSampleR *= ((1.0-fabs(bR[0]-bR[1]))*xfuzz);
if (fpFlip) {
inputSampleL = -inputSampleL;
inputSampleR = -inputSampleR;
}
fpFlip = !fpFlip;
for(int count = 0; count < 9; count++) {
if (gainL > 1.0) {
fL[count] = 1.0;
gainL -= 1.0;
} else {
fL[count] = gainL;
gainL = 0.0;
}
if (gainR > 1.0) {
fR[count] = 1.0;
gainR -= 1.0;
} else {
fR[count] = gainR;
gainR = 0.0;
}
fL[count] /= rDepthL;
fR[count] /= rDepthR;
inputSampleL += (bL[count] * fL[count]);
inputSampleR += (bR[count] * fR[count]);
}
if (wet < 1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * dry);
inputSampleR = (inputSampleR * wet) + (drySampleR * dry);
}
//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++;
}
}
