/* ========================================
* OneCornerClip - OneCornerClip.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __OneCornerClip_H
#include "OneCornerClip.h"
#endif
void OneCornerClip::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 inputGain = pow(10.0,(((A*36.0)-12.0)/20.0));
double posThreshold = B;
double posTargetL = posThreshold;
double posTargetR = posThreshold;
double negThreshold = -C;
double negTargetL = negThreshold;
double negTargetR = negThreshold;
double voicing = D;
if (voicing == 0.618) voicing = 0.618033988749894848204586;
//special case: we will do a perfect golden ratio as the default 0.618
//just 'cos magic universality sauce (seriously, it seems a sweetspot)
if (overallscale > 0.0) voicing /= overallscale;
//translate to desired sample rate, 44.1K is the base
if (voicing < 0.0) voicing = 0.0;
if (voicing > 1.0) voicing = 1.0;
//some insanity checking
double inverseHardness = 1.0 - voicing;
bool clipEngage = false;
double wet = E;
double dry = 1.0 - wet;
double drySampleL;
double drySampleR;
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.
}
drySampleL = inputSampleL;
drySampleR = inputSampleR;
if (inputGain != 1.0)
{
inputSampleL *= inputGain;
inputSampleR *= inputGain;
clipEngage = true;
//if we are altering gain we will always process
}
else
{
clipEngage = false;
//if we are not touching gain, we will bypass unless
//a clip is actively being softened.
}
if (inputSampleL > posTargetL)
{
inputSampleL = (lastSampleL * voicing) + (posThreshold * inverseHardness);
posTargetL = inputSampleL;
clipEngage = true;
}
else
{
posTargetL = posThreshold;
}
if (inputSampleR > posTargetR)
{
inputSampleR = (lastSampleR * voicing) + (posThreshold * inverseHardness);
posTargetR = inputSampleR;
clipEngage = true;
}
else
{
posTargetR = posThreshold;
}
if (inputSampleL < negTargetL)
{
inputSampleL = (lastSampleL * voicing) + (negThreshold * inverseHardness);
negTargetL = inputSampleL;
clipEngage = true;
}
else {
negTargetL = negThreshold;
}
if (inputSampleR < negTargetR)
{
inputSampleR = (lastSampleR * voicing) + (negThreshold * inverseHardness);
negTargetR = inputSampleR;
clipEngage = true;
}
else {
negTargetR = negThreshold;
}
lastSampleL = inputSampleL;
lastSampleR = inputSampleR;
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
if (clipEngage == false)
{
inputSampleL = *in1;
inputSampleR = *in2;
}
//fall back to raw passthrough if at all possible
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void OneCornerClip::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 inputGain = pow(10.0,(((A*36.0)-12.0)/20.0));
double posThreshold = B;
double posTargetL = posThreshold;
double posTargetR = posThreshold;
double negThreshold = -C;
double negTargetL = negThreshold;
double negTargetR = negThreshold;
double voicing = D;
if (voicing == 0.618) voicing = 0.618033988749894848204586;
//special case: we will do a perfect golden ratio as the default 0.618
//just 'cos magic universality sauce (seriously, it seems a sweetspot)
if (overallscale > 0.0) voicing /= overallscale;
//translate to desired sample rate, 44.1K is the base
if (voicing < 0.0) voicing = 0.0;
if (voicing > 1.0) voicing = 1.0;
//some insanity checking
double inverseHardness = 1.0 - voicing;
bool clipEngage = false;
double wet = E;
double dry = 1.0 - wet;
double drySampleL;
double drySampleR;
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.
}
drySampleL = inputSampleL;
drySampleR = inputSampleR;
if (inputGain != 1.0)
{
inputSampleL *= inputGain;
inputSampleR *= inputGain;
clipEngage = true;
//if we are altering gain we will always process
}
else
{
clipEngage = false;
//if we are not touching gain, we will bypass unless
//a clip is actively being softened.
}
if (inputSampleL > posTargetL)
{
inputSampleL = (lastSampleL * voicing) + (posThreshold * inverseHardness);
posTargetL = inputSampleL;
clipEngage = true;
}
else
{
posTargetL = posThreshold;
}
if (inputSampleR > posTargetR)
{
inputSampleR = (lastSampleR * voicing) + (posThreshold * inverseHardness);
posTargetR = inputSampleR;
clipEngage = true;
}
else
{
posTargetR = posThreshold;
}
if (inputSampleL < negTargetL)
{
inputSampleL = (lastSampleL * voicing) + (negThreshold * inverseHardness);
negTargetL = inputSampleL;
clipEngage = true;
}
else {
negTargetL = negThreshold;
}
if (inputSampleR < negTargetR)
{
inputSampleR = (lastSampleR * voicing) + (negThreshold * inverseHardness);
negTargetR = inputSampleR;
clipEngage = true;
}
else {
negTargetR = negThreshold;
}
lastSampleL = inputSampleL;
lastSampleR = inputSampleR;
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
if (clipEngage == false)
{
inputSampleL = *in1;
inputSampleR = *in2;
}
//fall back to raw passthrough if at all possible
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
