/* ========================================
* PurestAir - PurestAir.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __PurestAir_H
#include "PurestAir.h"
#endif
void PurestAir::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double applyTarget = (A*2.0)-1.0;
double threshold = pow((1-fabs(applyTarget)),3);
if (applyTarget > 0) applyTarget *= 3;
double intensity = pow(B,2)*5.0;
double wet = C;
while (--sampleFrames >= 0)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-37) inputSampleL = fpd * 1.18e-37;
if (fabs(inputSampleR)<1.18e-37) inputSampleR = fpd * 1.18e-37;
long double drySampleL = inputSampleL;
long double drySampleR = inputSampleR;
halfDrySampleL = halfwaySampleL = (inputSampleL + last1SampleL) / 2.0;
last1SampleL = inputSampleL;
s3L = s2L;
s2L = s1L;
s1L = inputSampleL;
double m1 = (s1L-s2L)*((s1L-s2L)/1.3);
double m2 = (s2L-s3L)*((s1L-s2L)/1.3);
double sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
//this will be 0 for smooth, high for SSS
applyL += applyTarget - sense;
applyL *= 0.5;
if (applyL < -1.0) applyL = -1.0;
double clamp = halfwaySampleL - halfDrySampleL;
if (clamp > threshold) halfwaySampleL = lastSampleL + threshold;
if (-clamp > threshold) halfwaySampleL = lastSampleL - threshold;
lastSampleL = halfwaySampleL;
clamp = inputSampleL - lastSampleL;
if (clamp > threshold) inputSampleL = lastSampleL + threshold;
if (-clamp > threshold) inputSampleL = lastSampleL - threshold;
lastSampleL = inputSampleL;
diffSampleL = *in1 - inputSampleL;
halfDiffSampleL = halfDrySampleL - halfwaySampleL;
inputSampleL = *in1 + ((diffSampleL + halfDiffSampleL)*applyL);
//done with left channel
halfDrySampleR = halfwaySampleR = (inputSampleR + last1SampleR) / 2.0;
last1SampleR = inputSampleR;
s3R = s2R;
s2R = s1R;
s1R = inputSampleR;
m1 = (s1R-s2R)*((s1R-s2R)/1.3);
m2 = (s2R-s3R)*((s1R-s2R)/1.3);
sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
//this will be 0 for smooth, high for SSS
applyR += applyTarget - sense;
applyR *= 0.5;
if (applyR < -1.0) applyR = -1.0;
clamp = halfwaySampleR - halfDrySampleR;
if (clamp > threshold) halfwaySampleR = lastSampleR + threshold;
if (-clamp > threshold) halfwaySampleR = lastSampleR - threshold;
lastSampleR = halfwaySampleR;
clamp = inputSampleR - lastSampleR;
if (clamp > threshold) inputSampleR = lastSampleR + threshold;
if (-clamp > threshold) inputSampleR = lastSampleR - threshold;
lastSampleR = inputSampleR;
diffSampleR = *in2 - inputSampleR;
halfDiffSampleR = halfDrySampleR - halfwaySampleR;
inputSampleR = *in2 + ((diffSampleR + halfDiffSampleR)*applyR);
//done with right channel
if (wet !=1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
}
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void PurestAir::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double applyTarget = (A*2.0)-1.0;
double threshold = pow((1-fabs(applyTarget)),3);
if (applyTarget > 0) applyTarget *= 3;
double intensity = pow(B,2)*5.0;
double wet = C;
while (--sampleFrames >= 0)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-43) inputSampleL = fpd * 1.18e-43;
if (fabs(inputSampleR)<1.18e-43) inputSampleR = fpd * 1.18e-43;
long double drySampleL = inputSampleL;
long double drySampleR = inputSampleR;
halfDrySampleL = halfwaySampleL = (inputSampleL + last1SampleL) / 2.0;
last1SampleL = inputSampleL;
s3L = s2L;
s2L = s1L;
s1L = inputSampleL;
double m1 = (s1L-s2L)*((s1L-s2L)/1.3);
double m2 = (s2L-s3L)*((s1L-s2L)/1.3);
double sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
//this will be 0 for smooth, high for SSS
applyL += applyTarget - sense;
applyL *= 0.5;
if (applyL < -1.0) applyL = -1.0;
double clamp = halfwaySampleL - halfDrySampleL;
if (clamp > threshold) halfwaySampleL = lastSampleL + threshold;
if (-clamp > threshold) halfwaySampleL = lastSampleL - threshold;
lastSampleL = halfwaySampleL;
clamp = inputSampleL - lastSampleL;
if (clamp > threshold) inputSampleL = lastSampleL + threshold;
if (-clamp > threshold) inputSampleL = lastSampleL - threshold;
lastSampleL = inputSampleL;
diffSampleL = *in1 - inputSampleL;
halfDiffSampleL = halfDrySampleL - halfwaySampleL;
inputSampleL = *in1 + ((diffSampleL + halfDiffSampleL)*applyL);
//done with left channel
halfDrySampleR = halfwaySampleR = (inputSampleR + last1SampleR) / 2.0;
last1SampleR = inputSampleR;
s3R = s2R;
s2R = s1R;
s1R = inputSampleR;
m1 = (s1R-s2R)*((s1R-s2R)/1.3);
m2 = (s2R-s3R)*((s1R-s2R)/1.3);
sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
//this will be 0 for smooth, high for SSS
applyR += applyTarget - sense;
applyR *= 0.5;
if (applyR < -1.0) applyR = -1.0;
clamp = halfwaySampleR - halfDrySampleR;
if (clamp > threshold) halfwaySampleR = lastSampleR + threshold;
if (-clamp > threshold) halfwaySampleR = lastSampleR - threshold;
lastSampleR = halfwaySampleR;
clamp = inputSampleR - lastSampleR;
if (clamp > threshold) inputSampleR = lastSampleR + threshold;
if (-clamp > threshold) inputSampleR = lastSampleR - threshold;
lastSampleR = inputSampleR;
diffSampleR = *in2 - inputSampleR;
halfDiffSampleR = halfDrySampleR - halfwaySampleR;
inputSampleR = *in2 + ((diffSampleR + halfDiffSampleR)*applyR);
//done with right channel
if (wet !=1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
}
//begin 64 bit stereo floating point dither
int expon; frexp((double)inputSampleL, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
frexp((double)inputSampleR, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//end 64 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
