/* ========================================
* ChorusEnsemble - ChorusEnsemble.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __ChorusEnsemble_H
#include "ChorusEnsemble.h"
#endif
void ChorusEnsemble::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 speed = pow(A,3) * 0.001;
speed *= overallscale;
int loopLimit = (int)(totalsamples * 0.499);
int count;
double range = pow(B,3) * loopLimit * 0.12;
double wet = C;
double modulation = range*wet;
double dry = 1.0 - wet;
double tupi = 3.141592653589793238 * 2.0;
double offset;
double start[4];
long double inputSampleL;
long double inputSampleR;
double drySampleL;
double drySampleR;
//now we'll precalculate some stuff that needn't be in every sample
start[0] = range;
start[1] = range * 2;
start[2] = range * 3;
start[3] = range * 4;
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;
airFactorL = airPrevL - inputSampleL;
if (fpFlip) {airEvenL += airFactorL; airOddL -= airFactorL; airFactorL = airEvenL;}
else {airOddL += airFactorL; airEvenL -= airFactorL; airFactorL = airOddL;}
airOddL = (airOddL - ((airOddL - airEvenL)/256.0)) / 1.0001;
airEvenL = (airEvenL - ((airEvenL - airOddL)/256.0)) / 1.0001;
airPrevL = inputSampleL;
inputSampleL += (airFactorL*wet);
//air, compensates for loss of highs in flanger's interpolation
airFactorR = airPrevR - inputSampleR;
if (fpFlip) {airEvenR += airFactorR; airOddR -= airFactorR; airFactorR = airEvenR;}
else {airOddR += airFactorR; airEvenR -= airFactorR; airFactorR = airOddR;}
airOddR = (airOddR - ((airOddR - airEvenR)/256.0)) / 1.0001;
airEvenR = (airEvenR - ((airEvenR - airOddR)/256.0)) / 1.0001;
airPrevR = inputSampleR;
inputSampleR += (airFactorR*wet);
//air, compensates for loss of highs in flanger's interpolation
if (gcount < 1 || gcount > loopLimit) {gcount = loopLimit;}
count = gcount;
dL[count+loopLimit] = dL[count] = inputSampleL;
dR[count+loopLimit] = dR[count] = inputSampleR;
gcount--;
//double buffer
offset = start[0] + (modulation * sin(sweep));
count = gcount + (int)floor(offset);
inputSampleL = dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR = dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
offset = start[1] + (modulation * sin(sweep + 1.0));
count = gcount + (int)floor(offset);
inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
offset = start[2] + (modulation * sin(sweep + 2.0));
count = gcount + (int)floor(offset);
inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
offset = start[3] + (modulation * sin(sweep + 3.0));
count = gcount + (int)floor(offset);
inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
inputSampleL *= 0.125; //to get a comparable level
inputSampleR *= 0.125; //to get a comparable level
sweep += speed;
if (sweep > tupi){sweep -= tupi;}
//still scrolling through the samples, remember
if (wet !=1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * dry);
inputSampleR = (inputSampleR * wet) + (drySampleR * dry);
}
fpFlip = !fpFlip;
//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 ChorusEnsemble::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 speed = pow(A,3) * 0.001;
speed *= overallscale;
int loopLimit = (int)(totalsamples * 0.499);
int count;
double range = pow(B,3) * loopLimit * 0.12;
double wet = C;
double modulation = range*wet;
double dry = 1.0 - wet;
double tupi = 3.141592653589793238 * 2.0;
double offset;
double start[4];
long double inputSampleL;
long double inputSampleR;
double drySampleL;
double drySampleR;
//now we'll precalculate some stuff that needn't be in every sample
start[0] = range;
start[1] = range * 2;
start[2] = range * 3;
start[3] = range * 4;
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;
airFactorL = airPrevL - inputSampleL;
if (fpFlip) {airEvenL += airFactorL; airOddL -= airFactorL; airFactorL = airEvenL;}
else {airOddL += airFactorL; airEvenL -= airFactorL; airFactorL = airOddL;}
airOddL = (airOddL - ((airOddL - airEvenL)/256.0)) / 1.0001;
airEvenL = (airEvenL - ((airEvenL - airOddL)/256.0)) / 1.0001;
airPrevL = inputSampleL;
inputSampleL += (airFactorL*wet);
//air, compensates for loss of highs in flanger's interpolation
airFactorR = airPrevR - inputSampleR;
if (fpFlip) {airEvenR += airFactorR; airOddR -= airFactorR; airFactorR = airEvenR;}
else {airOddR += airFactorR; airEvenR -= airFactorR; airFactorR = airOddR;}
airOddR = (airOddR - ((airOddR - airEvenR)/256.0)) / 1.0001;
airEvenR = (airEvenR - ((airEvenR - airOddR)/256.0)) / 1.0001;
airPrevR = inputSampleR;
inputSampleR += (airFactorR*wet);
//air, compensates for loss of highs in flanger's interpolation
if (gcount < 1 || gcount > loopLimit) {gcount = loopLimit;}
count = gcount;
dL[count+loopLimit] = dL[count] = inputSampleL;
dR[count+loopLimit] = dR[count] = inputSampleR;
gcount--;
//double buffer
offset = start[0] + (modulation * sin(sweep));
count = gcount + (int)floor(offset);
inputSampleL = dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR = dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
offset = start[1] + (modulation * sin(sweep + 1.0));
count = gcount + (int)floor(offset);
inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
offset = start[2] + (modulation * sin(sweep + 2.0));
count = gcount + (int)floor(offset);
inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
offset = start[3] + (modulation * sin(sweep + 3.0));
count = gcount + (int)floor(offset);
inputSampleL += dL[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleL += dL[count+1]; //we can assume always using this in one way or another?
inputSampleL += (dL[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleL -= (((dL[count]-dL[count+1])-(dL[count+1]-dL[count+2]))/50); //interpolation hacks 'r us
inputSampleR += dR[count] * (1-(offset-floor(offset))); //less as value moves away from .0
inputSampleR += dR[count+1]; //we can assume always using this in one way or another?
inputSampleR += (dR[count+2] * (offset-floor(offset))); //greater as value moves away from .0
inputSampleR -= (((dR[count]-dR[count+1])-(dR[count+1]-dR[count+2]))/50); //interpolation hacks 'r us
inputSampleL *= 0.125; //to get a comparable level
inputSampleR *= 0.125; //to get a comparable level
sweep += speed;
if (sweep > tupi){sweep -= tupi;}
//still scrolling through the samples, remember
if (wet !=1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * dry);
inputSampleR = (inputSampleR * wet) + (drySampleR * dry);
}
fpFlip = !fpFlip;
//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++;
}
}
