/* ========================================
* Lowpass2 - Lowpass2.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Lowpass2_H
#include "Lowpass2.h"
#endif
void Lowpass2::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double iirAmount = A;
double tight = (B*2.0)-1.0;
if (iirAmount < 0.0000001) iirAmount = 0.0000001;
if (iirAmount > 1) iirAmount = 1;
if (tight < 0.0) tight *= 0.5;
double offsetL;
double offsetR;
double aWet = 1.0;
double bWet = 1.0;
double cWet = 1.0;
double dWet = C*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
double wet = D;
while (--sampleFrames >= 0)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
static int noisesourceL = 0;
static int noisesourceR = 850010;
int residue;
double applyresidue;
noisesourceL = noisesourceL % 1700021; noisesourceL++;
residue = noisesourceL * noisesourceL;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL += applyresidue;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
inputSampleL -= applyresidue;
}
noisesourceR = noisesourceR % 1700021; noisesourceR++;
residue = noisesourceR * noisesourceR;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR += applyresidue;
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
inputSampleR -= applyresidue;
}
//for live air, we always apply the dither noise. Then, if our result is
//effectively digital black, we'll subtract it again. We want a 'air' hiss
long double drySampleL = inputSampleL;
long double drySampleR = inputSampleR;
if (tight > 0) offsetL = (1 - tight) + (fabs(inputSampleL)*tight);
else offsetL = (1 + tight) + ((1-fabs(inputSampleL))*tight);
if (offsetL < 0.0000001) offsetL = 0.0000001; if (offsetL > 1) offsetL = 1;
if (tight > 0) offsetR = (1 - tight) + (fabs(inputSampleR)*tight);
else offsetR = (1 + tight) + ((1-fabs(inputSampleR))*tight);
if (offsetR < 0.0000001) offsetR = 0.0000001; if (offsetR > 1) offsetR = 1;
if (fpFlip)
{
if (aWet > 0.0) {
iirSampleAL = (iirSampleAL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleAL * aWet) + (inputSampleL * (1.0-aWet));
iirSampleAR = (iirSampleAR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleAR * aWet) + (inputSampleR * (1.0-aWet));
}
if (bWet > 0.0) {
iirSampleCL = (iirSampleCL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleCL * bWet) + (inputSampleL * (1.0-bWet));
iirSampleCR = (iirSampleCR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleCR * bWet) + (inputSampleR * (1.0-bWet));
}
if (cWet > 0.0) {
iirSampleEL = (iirSampleEL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleEL * cWet) + (inputSampleL * (1.0-cWet));
iirSampleER = (iirSampleER * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleER * cWet) + (inputSampleR * (1.0-cWet));
}
if (dWet > 0.0) {
iirSampleGL = (iirSampleGL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleGL * dWet) + (inputSampleL * (1.0-dWet));
iirSampleGR = (iirSampleGR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleGR * dWet) + (inputSampleR * (1.0-dWet));
}
}
else
{
if (aWet > 0.0) {
iirSampleBL = (iirSampleBL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleBL * aWet) + (inputSampleL * (1.0-aWet));
iirSampleBR = (iirSampleBR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleBR * aWet) + (inputSampleR * (1.0-aWet));
}
if (bWet > 0.0) {
iirSampleDL = (iirSampleDL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleDL * bWet) + (inputSampleL * (1.0-bWet));
iirSampleDR = (iirSampleDR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleDR * bWet) + (inputSampleR * (1.0-bWet));
}
if (cWet > 0.0) {
iirSampleFL = (iirSampleFL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleFL * cWet) + (inputSampleL * (1.0-cWet));
iirSampleFR = (iirSampleFR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleFR * cWet) + (inputSampleR * (1.0-cWet));
}
if (dWet > 0.0) {
iirSampleHL = (iirSampleHL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleHL * dWet) + (inputSampleL * (1.0-dWet));
iirSampleHR = (iirSampleHR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleHR * dWet) + (inputSampleR * (1.0-dWet));
}
}
if (wet !=1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
}
//Dry/Wet control, defaults to the last slider
fpFlip = !fpFlip;
//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 Lowpass2::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double iirAmount = A;
double tight = (B*2.0)-1.0;
iirAmount += fabs(tight);
if (iirAmount < 0.0000001) iirAmount = 0.0000001;
if (iirAmount > 1) iirAmount = 1;
if (tight < 0.0) tight *= 0.5;
double offsetL;
double offsetR;
double aWet = 1.0;
double bWet = 1.0;
double cWet = 1.0;
double dWet = C*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
double wet = D;
while (--sampleFrames >= 0)
{
long double inputSampleL = *in1;
long double inputSampleR = *in2;
static int noisesourceL = 0;
static int noisesourceR = 850010;
int residue;
double applyresidue;
noisesourceL = noisesourceL % 1700021; noisesourceL++;
residue = noisesourceL * noisesourceL;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL += applyresidue;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
inputSampleL -= applyresidue;
}
noisesourceR = noisesourceR % 1700021; noisesourceR++;
residue = noisesourceR * noisesourceR;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR += applyresidue;
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
inputSampleR -= applyresidue;
}
//for live air, we always apply the dither noise. Then, if our result is
//effectively digital black, we'll subtract it again. We want a 'air' hiss
long double drySampleL = inputSampleL;
long double drySampleR = inputSampleR;
if (tight > 0) offsetL = (1 - tight) + (fabs(inputSampleL)*tight);
else offsetL = (1 + tight) + ((1-fabs(inputSampleL))*tight);
if (offsetL < 0.0000001) offsetL = 0.0000001; if (offsetL > 1) offsetL = 1;
if (tight > 0) offsetR = (1 - tight) + (fabs(inputSampleR)*tight);
else offsetR = (1 + tight) + ((1-fabs(inputSampleR))*tight);
if (offsetR < 0.0000001) offsetR = 0.0000001; if (offsetR > 1) offsetR = 1;
if (fpFlip)
{
if (aWet > 0.0) {
iirSampleAL = (iirSampleAL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleAL * aWet) + (inputSampleL * (1.0-aWet));
iirSampleAR = (iirSampleAR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleAR * aWet) + (inputSampleR * (1.0-aWet));
}
if (bWet > 0.0) {
iirSampleCL = (iirSampleCL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleCL * bWet) + (inputSampleL * (1.0-bWet));
iirSampleCR = (iirSampleCR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleCR * bWet) + (inputSampleR * (1.0-bWet));
}
if (cWet > 0.0) {
iirSampleEL = (iirSampleEL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleEL * cWet) + (inputSampleL * (1.0-cWet));
iirSampleER = (iirSampleER * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleER * cWet) + (inputSampleR * (1.0-cWet));
}
if (dWet > 0.0) {
iirSampleGL = (iirSampleGL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleGL * dWet) + (inputSampleL * (1.0-dWet));
iirSampleGR = (iirSampleGR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleGR * dWet) + (inputSampleR * (1.0-dWet));
}
}
else
{
if (aWet > 0.0) {
iirSampleBL = (iirSampleBL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleBL * aWet) + (inputSampleL * (1.0-aWet));
iirSampleBR = (iirSampleBR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleBR * aWet) + (inputSampleR * (1.0-aWet));
}
if (bWet > 0.0) {
iirSampleDL = (iirSampleDL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleDL * bWet) + (inputSampleL * (1.0-bWet));
iirSampleDR = (iirSampleDR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleDR * bWet) + (inputSampleR * (1.0-bWet));
}
if (cWet > 0.0) {
iirSampleFL = (iirSampleFL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleFL * cWet) + (inputSampleL * (1.0-cWet));
iirSampleFR = (iirSampleFR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleFR * cWet) + (inputSampleR * (1.0-cWet));
}
if (dWet > 0.0) {
iirSampleHL = (iirSampleHL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount));
inputSampleL = (iirSampleHL * dWet) + (inputSampleL * (1.0-dWet));
iirSampleHR = (iirSampleHR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount));
inputSampleR = (iirSampleHR * dWet) + (inputSampleR * (1.0-dWet));
}
}
if (wet !=1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
}
//Dry/Wet control, defaults to the last slider
fpFlip = !fpFlip;
//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++;
}
}
