/* ========================================
* Wider - Wider.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Wider_H
#include "Wider.h"
#endif
void Wider::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;
double drySampleL;
double drySampleR;
long double mid;
long double side;
double out;
double densityside = (A*2.0)-1.0;
double densitymid = (B*2.0)-1.0;
double wet = C;
double dry = 1.0 - wet;
wet *= 0.5; //we make mid-side by adding/subtracting both channels into each channel
//and that's why we gotta divide it by 2: otherwise everything's doubled. So, premultiply it to save an extra 'math'
double offset = (densityside-densitymid)/2;
if (offset > 0) offset = sin(offset);
if (offset < 0) offset = -sin(-offset);
offset = -(pow(offset,4) * 20 * overallscale);
int near = (int)floor(fabs(offset));
double farLevel = fabs(offset) - near;
int far = near + 1;
double nearLevel = 1.0 - farLevel;
double bridgerectifier;
//interpolating the sample
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;
//assign working variables
mid = inputSampleL + inputSampleR;
side = inputSampleL - inputSampleR;
//assign mid and side. Now, High Impact code
if (densityside != 0.0)
{
out = fabs(densityside);
bridgerectifier = fabs(side)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densityside > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (side > 0) side = (side*(1-out))+(bridgerectifier*out);
else side = (side*(1-out))-(bridgerectifier*out);
//blend according to density control
}
if (densitymid != 0.0)
{
out = fabs(densitymid);
bridgerectifier = fabs(mid)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densitymid > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (mid > 0) mid = (mid*(1-out))+(bridgerectifier*out);
else mid = (mid*(1-out))-(bridgerectifier*out);
//blend according to density control
}
if (count < 1 || count > 2048) {count = 2048;}
if (offset > 0)
{
p[count+2048] = p[count] = mid;
mid = p[count+near]*nearLevel;
mid += p[count+far]*farLevel;
}
if (offset < 0)
{
p[count+2048] = p[count] = side;
side = p[count+near]*nearLevel;
side += p[count+far]*farLevel;
}
count -= 1;
inputSampleL = (drySampleL * dry) + ((mid+side) * wet);
inputSampleR = (drySampleR * dry) + ((mid-side) * 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 Wider::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;
double drySampleL;
double drySampleR;
long double mid;
long double side;
double out;
double densityside = (A*2.0)-1.0;
double densitymid = (B*2.0)-1.0;
double wet = C;
double dry = 1.0 - wet;
wet *= 0.5; //we make mid-side by adding/subtracting both channels into each channel
//and that's why we gotta divide it by 2: otherwise everything's doubled. So, premultiply it to save an extra 'math'
double offset = (densityside-densitymid)/2;
if (offset > 0) offset = sin(offset);
if (offset < 0) offset = -sin(-offset);
offset = -(pow(offset,4) * 20 * overallscale);
int near = (int)floor(fabs(offset));
double farLevel = fabs(offset) - near;
int far = near + 1;
double nearLevel = 1.0 - farLevel;
double bridgerectifier;
//interpolating the sample
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;
//assign working variables
mid = inputSampleL + inputSampleR;
side = inputSampleL - inputSampleR;
//assign mid and side. Now, High Impact code
if (densityside != 0.0)
{
out = fabs(densityside);
bridgerectifier = fabs(side)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densityside > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (side > 0) side = (side*(1-out))+(bridgerectifier*out);
else side = (side*(1-out))-(bridgerectifier*out);
//blend according to density control
}
if (densitymid != 0.0)
{
out = fabs(densitymid);
bridgerectifier = fabs(mid)*1.57079633;
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (densitymid > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (mid > 0) mid = (mid*(1-out))+(bridgerectifier*out);
else mid = (mid*(1-out))-(bridgerectifier*out);
//blend according to density control
}
if (count < 1 || count > 2048) {count = 2048;}
if (offset > 0)
{
p[count+2048] = p[count] = mid;
mid = p[count+near]*nearLevel;
mid += p[count+far]*farLevel;
}
if (offset < 0)
{
p[count+2048] = p[count] = side;
side = p[count+near]*nearLevel;
side += p[count+far]*farLevel;
}
count -= 1;
inputSampleL = (drySampleL * dry) + ((mid+side) * wet);
inputSampleR = (drySampleR * dry) + ((mid-side) * 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++;
}
}
