/* ========================================
* Distortion - Distortion.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Distortion_H
#include "Distortion.h"
#endif
void Distortion::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
int stages = (int)floor(getSampleRate()/25000.0);
if (stages > 8) stages = 8;
double input = pow(10.0,((A-0.5)*24.0)/20.0);
int mode = (int) ( B * 4.999 );
double output = pow(10.0,((C-0.5)*24.0)/20.0);
double wet = D;
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;
inputSampleL *= input;
inputSampleR *= input;
for (int x = 0; x < stages; x++) {
long double temp;
temp = (inputSampleL+previousInL[x])*0.5;
previousInL[x] = inputSampleL;
inputSampleL = temp;
temp = (inputSampleR+previousInR[x])*0.5;
previousInR[x] = inputSampleR;
inputSampleR = temp;
}
switch (mode)
{
case 0: //Density
if (inputSampleL > 1.570796326794897) inputSampleL = 1.570796326794897;
if (inputSampleL < -1.570796326794897) inputSampleL = -1.570796326794897;
if (inputSampleR > 1.570796326794897) inputSampleR = 1.570796326794897;
if (inputSampleR < -1.570796326794897) inputSampleR = -1.570796326794897;
//clip to 1.570796326794897 to reach maximum output
inputSampleL = sin(inputSampleL);
inputSampleR = sin(inputSampleR);
break;
case 1: //Drive
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleL -= (inputSampleL * (fabs(inputSampleL) * 0.6) * (fabs(inputSampleL) * 0.6));
inputSampleR -= (inputSampleR * (fabs(inputSampleR) * 0.6) * (fabs(inputSampleR) * 0.6));
inputSampleL *= 1.5;
inputSampleR *= 1.5;
break;
case 2: //Spiral
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
//clip to 1.2533141373155 to reach maximum output
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((inputSampleL == 0.0) ?1:fabs(inputSampleL));
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((inputSampleR == 0.0) ?1:fabs(inputSampleR));
break;
case 3: //Mojo
long double mojo; mojo = pow(fabs(inputSampleL),0.25);
if (mojo > 0.0) inputSampleL = (sin(inputSampleL * mojo * M_PI * 0.5) / mojo) * 0.987654321;
mojo = pow(fabs(inputSampleR),0.25);
if (mojo > 0.0) inputSampleR = (sin(inputSampleR * mojo * M_PI * 0.5) / mojo) * 0.987654321;
//mojo is the one that flattens WAAAAY out very softly before wavefolding
break;
case 4: //Dyno
long double dyno; dyno = pow(fabs(inputSampleL),4);
if (dyno > 0.0) inputSampleL = (sin(inputSampleL * dyno) / dyno) * 1.1654321;
dyno = pow(fabs(inputSampleR),4);
if (dyno > 0.0) inputSampleR = (sin(inputSampleR * dyno) / dyno) * 1.1654321;
//dyno is the one that tries to raise peak energy
break;
}
for (int x = 1; x < (stages/2); x++) {
long double temp;
temp = (inputSampleL+previousOutL[x])*0.5;
previousOutL[x] = inputSampleL;
inputSampleL = temp;
temp = (inputSampleR+previousOutR[x])*0.5;
previousOutR[x] = inputSampleR;
inputSampleR = temp;
}
if (output != 1.0) {
inputSampleL *= output;
inputSampleR *= output;
}
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 Distortion::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
int stages = (int)floor(getSampleRate()/25000.0);
if (stages > 8) stages = 8;
double input = pow(10.0,((A-0.5)*24.0)/20.0);
int mode = (int) ( B * 4.999 );
double output = pow(10.0,((C-0.5)*24.0)/20.0);
double wet = D;
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;
inputSampleL *= input;
inputSampleR *= input;
for (int x = 0; x < stages; x++) {
long double temp;
temp = (inputSampleL+previousInL[x])*0.5;
previousInL[x] = inputSampleL;
inputSampleL = temp;
temp = (inputSampleR+previousInR[x])*0.5;
previousInR[x] = inputSampleR;
inputSampleR = temp;
}
switch (mode)
{
case 0: //Density
if (inputSampleL > 1.570796326794897) inputSampleL = 1.570796326794897;
if (inputSampleL < -1.570796326794897) inputSampleL = -1.570796326794897;
if (inputSampleR > 1.570796326794897) inputSampleR = 1.570796326794897;
if (inputSampleR < -1.570796326794897) inputSampleR = -1.570796326794897;
//clip to 1.570796326794897 to reach maximum output
inputSampleL = sin(inputSampleL);
inputSampleR = sin(inputSampleR);
break;
case 1: //Drive
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleL -= (inputSampleL * (fabs(inputSampleL) * 0.6) * (fabs(inputSampleL) * 0.6));
inputSampleR -= (inputSampleR * (fabs(inputSampleR) * 0.6) * (fabs(inputSampleR) * 0.6));
inputSampleL *= 1.5;
inputSampleR *= 1.5;
break;
case 2: //Spiral
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
//clip to 1.2533141373155 to reach maximum output
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((inputSampleL == 0.0) ?1:fabs(inputSampleL));
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((inputSampleR == 0.0) ?1:fabs(inputSampleR));
break;
case 3: //Mojo
long double mojo; mojo = pow(fabs(inputSampleL),0.25);
if (mojo > 0.0) inputSampleL = (sin(inputSampleL * mojo * M_PI * 0.5) / mojo) * 0.987654321;
mojo = pow(fabs(inputSampleR),0.25);
if (mojo > 0.0) inputSampleR = (sin(inputSampleR * mojo * M_PI * 0.5) / mojo) * 0.987654321;
//mojo is the one that flattens WAAAAY out very softly before wavefolding
break;
case 4: //Dyno
long double dyno; dyno = pow(fabs(inputSampleL),4);
if (dyno > 0.0) inputSampleL = (sin(inputSampleL * dyno) / dyno) * 1.1654321;
dyno = pow(fabs(inputSampleR),4);
if (dyno > 0.0) inputSampleR = (sin(inputSampleR * dyno) / dyno) * 1.1654321;
//dyno is the one that tries to raise peak energy
break;
}
for (int x = 1; x < (stages/2); x++) {
long double temp;
temp = (inputSampleL+previousOutL[x])*0.5;
previousOutL[x] = inputSampleL;
inputSampleL = temp;
temp = (inputSampleR+previousOutR[x])*0.5;
previousOutR[x] = inputSampleR;
inputSampleR = temp;
}
if (output != 1.0) {
inputSampleL *= output;
inputSampleR *= output;
}
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++;
}
}
