/* ========================================
* Desk - Desk.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Desk_H
#include "Desk.h"
#endif
void Desk::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double gain = 0.135;
double slewgain = 0.208;
double prevslew = 0.333;
double balanceB = 0.0001;
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
slewgain *= overallscale;
prevslew *= overallscale;
balanceB /= overallscale;
double balanceA = 1.0 - balanceB;
double slew;
double bridgerectifier;
double combsample;
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;
//begin L
slew = inputSampleL - lastSampleL;
lastSampleL = inputSampleL;
//Set up direct reference for slew
bridgerectifier = fabs(slew*slewgain);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (slew > 0) slew = bridgerectifier/slewgain;
else slew = -(bridgerectifier/slewgain);
inputSampleL = (lastOutSampleL*balanceA) + (lastSampleL*balanceB) + slew;
//go from last slewed, but include some raw values
lastOutSampleL = inputSampleL;
//Set up slewed reference
combsample = fabs(drySampleL*lastSampleL);
if (combsample > 1.0) combsample = 1.0;
//bailout for very high input gains
inputSampleL -= (lastSlewL * combsample * prevslew);
lastSlewL = slew;
//slew interaction with previous slew
inputSampleL *= gain;
bridgerectifier = fabs(inputSampleL);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (inputSampleL > 0) inputSampleL = bridgerectifier;
else inputSampleL = -bridgerectifier;
//drive section
inputSampleL /= gain;
//end L
//begin R
slew = inputSampleR - lastSampleR;
lastSampleR = inputSampleR;
//Set up direct reference for slew
bridgerectifier = fabs(slew*slewgain);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (slew > 0) slew = bridgerectifier/slewgain;
else slew = -(bridgerectifier/slewgain);
inputSampleR = (lastOutSampleR*balanceA) + (lastSampleR*balanceB) + slew;
//go from last slewed, but include some raw values
lastOutSampleR = inputSampleR;
//Set up slewed reference
combsample = fabs(drySampleR*lastSampleR);
if (combsample > 1.0) combsample = 1.0;
//bailout for very high input gains
inputSampleR -= (lastSlewR * combsample * prevslew);
lastSlewR = slew;
//slew interaction with previous slew
inputSampleR *= gain;
bridgerectifier = fabs(inputSampleR);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (inputSampleR > 0) inputSampleR = bridgerectifier;
else inputSampleR = -bridgerectifier;
//drive section
inputSampleR /= gain;
//end R
//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 Desk::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double gain = 0.135;
double slewgain = 0.208;
double prevslew = 0.333;
double balanceB = 0.0001;
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
slewgain *= overallscale;
prevslew *= overallscale;
balanceB /= overallscale;
double balanceA = 1.0 - balanceB;
double slew;
double bridgerectifier;
double combsample;
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;
//begin L
slew = inputSampleL - lastSampleL;
lastSampleL = inputSampleL;
//Set up direct reference for slew
bridgerectifier = fabs(slew*slewgain);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (slew > 0) slew = bridgerectifier/slewgain;
else slew = -(bridgerectifier/slewgain);
inputSampleL = (lastOutSampleL*balanceA) + (lastSampleL*balanceB) + slew;
//go from last slewed, but include some raw values
lastOutSampleL = inputSampleL;
//Set up slewed reference
combsample = fabs(drySampleL*lastSampleL);
if (combsample > 1.0) combsample = 1.0;
//bailout for very high input gains
inputSampleL -= (lastSlewL * combsample * prevslew);
lastSlewL = slew;
//slew interaction with previous slew
inputSampleL *= gain;
bridgerectifier = fabs(inputSampleL);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (inputSampleL > 0) inputSampleL = bridgerectifier;
else inputSampleL = -bridgerectifier;
//drive section
inputSampleL /= gain;
//end L
//begin R
slew = inputSampleR - lastSampleR;
lastSampleR = inputSampleR;
//Set up direct reference for slew
bridgerectifier = fabs(slew*slewgain);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (slew > 0) slew = bridgerectifier/slewgain;
else slew = -(bridgerectifier/slewgain);
inputSampleR = (lastOutSampleR*balanceA) + (lastSampleR*balanceB) + slew;
//go from last slewed, but include some raw values
lastOutSampleR = inputSampleR;
//Set up slewed reference
combsample = fabs(drySampleR*lastSampleR);
if (combsample > 1.0) combsample = 1.0;
//bailout for very high input gains
inputSampleR -= (lastSlewR * combsample * prevslew);
lastSlewR = slew;
//slew interaction with previous slew
inputSampleR *= gain;
bridgerectifier = fabs(inputSampleR);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
else bridgerectifier = sin(bridgerectifier);
if (inputSampleR > 0) inputSampleR = bridgerectifier;
else inputSampleR = -bridgerectifier;
//drive section
inputSampleR /= gain;
//end R
//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++;
}
}
