/* ========================================
* PowerSag - PowerSag.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __PowerSag_H
#include "PowerSag.h"
#endif
void PowerSag::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double intensity = pow(A,5)*80.0;
double depthA = pow(B,2);
int offsetA = (int)(depthA * 3900) + 1;
double clamp;
double thickness;
double out;
double bridgerectifier;
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.
}
if (gcount < 0 || gcount > 4000) {gcount = 4000;}
//doing L
dL[gcount+4000] = dL[gcount] = fabs(inputSampleL)*intensity;
controlL += (dL[gcount] / offsetA);
controlL -= (dL[gcount+offsetA] / offsetA);
controlL -= 0.000001;
clamp = 1;
if (controlL < 0) {controlL = 0;}
if (controlL > 1) {clamp -= (controlL - 1); controlL = 1;}
if (clamp < 0.5) {clamp = 0.5;}
thickness = ((1.0 - controlL) * 2.0) - 1.0;
out = fabs(thickness);
bridgerectifier = fabs(inputSampleL);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (thickness > 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
inputSampleL *= clamp;
//end L
//doing R
dR[gcount+4000] = dR[gcount] = fabs(inputSampleR)*intensity;
controlR += (dR[gcount] / offsetA);
controlR -= (dR[gcount+offsetA] / offsetA);
controlR -= 0.000001;
clamp = 1;
if (controlR < 0) {controlR = 0;}
if (controlR > 1) {clamp -= (controlR - 1); controlR = 1;}
if (clamp < 0.5) {clamp = 0.5;}
thickness = ((1.0 - controlR) * 2.0) - 1.0;
out = fabs(thickness);
bridgerectifier = fabs(inputSampleR);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (thickness > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-out))+(bridgerectifier*out);
else inputSampleR = (inputSampleR*(1-out))-(bridgerectifier*out);
//blend according to density control
inputSampleR *= clamp;
//end R
gcount--;
//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 PowerSag::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double intensity = pow(A,5)*80.0;
double depthA = pow(B,2);
int offsetA = (int)(depthA * 3900) + 1;
double clamp;
double thickness;
double out;
double bridgerectifier;
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.
}
if (gcount < 0 || gcount > 4000) {gcount = 4000;}
//doing L
dL[gcount+4000] = dL[gcount] = fabs(inputSampleL)*intensity;
controlL += (dL[gcount] / offsetA);
controlL -= (dL[gcount+offsetA] / offsetA);
controlL -= 0.000001;
clamp = 1;
if (controlL < 0) {controlL = 0;}
if (controlL > 1) {clamp -= (controlL - 1); controlL = 1;}
if (clamp < 0.5) {clamp = 0.5;}
thickness = ((1.0 - controlL) * 2.0) - 1.0;
out = fabs(thickness);
bridgerectifier = fabs(inputSampleL);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (thickness > 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
inputSampleL *= clamp;
//end L
//doing R
dR[gcount+4000] = dR[gcount] = fabs(inputSampleR)*intensity;
controlR += (dR[gcount] / offsetA);
controlR -= (dR[gcount+offsetA] / offsetA);
controlR -= 0.000001;
clamp = 1;
if (controlR < 0) {controlR = 0;}
if (controlR > 1) {clamp -= (controlR - 1); controlR = 1;}
if (clamp < 0.5) {clamp = 0.5;}
thickness = ((1.0 - controlR) * 2.0) - 1.0;
out = fabs(thickness);
bridgerectifier = fabs(inputSampleR);
if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
//max value for sine function
if (thickness > 0) bridgerectifier = sin(bridgerectifier);
else bridgerectifier = 1-cos(bridgerectifier);
//produce either boosted or starved version
if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-out))+(bridgerectifier*out);
else inputSampleR = (inputSampleR*(1-out))-(bridgerectifier*out);
//blend according to density control
inputSampleR *= clamp;
//end R
gcount--;
//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++;
}
}
