/* ========================================
* Console5Channel - Console5Channel.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __Console5Channel_H
#include "Console5Channel.h"
#endif
void Console5Channel::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 = A;
double differenceL;
double differenceR;
double nearZeroL;
double nearZeroR;
double servoTrim = 0.0000001 / overallscale;
double bassTrim = 0.005 / overallscale;
long double inputSampleL;
long double inputSampleR;
if (settingchase != inputgain) {
chasespeed *= 2.0;
settingchase = inputgain;
}
if (chasespeed > 2500.0) chasespeed = 2500.0;
if (gainchase < 0.0) gainchase = inputgain;
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.
}
chasespeed *= 0.9999;
chasespeed -= 0.01;
if (chasespeed < 350.0) chasespeed = 350.0;
//we have our chase speed compensated for recent fader activity
gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0));
//gainchase is chasing the target, as a simple multiply gain factor
if (1.0 != gainchase) {
inputSampleL *= gainchase;
inputSampleR *= gainchase;
}
//done with trim control
differenceL = lastSampleChannelL - inputSampleL;
lastSampleChannelL = inputSampleL;
differenceR = lastSampleChannelR - inputSampleR;
lastSampleChannelR = inputSampleR;
//derive slew part off direct sample measurement + from last time
if (differenceL > 1.0) differenceL = 1.0;
if (differenceL < -1.0) differenceL = -1.0;
if (differenceR > 1.0) differenceR = 1.0;
if (differenceR < -1.0) differenceR = -1.0;
//clamp the slew correction to prevent invalid math results
differenceL = lastFXChannelL + asin(differenceL);
differenceR = lastFXChannelR + asin(differenceR);
//we're about to use this twice and then not use difference again, so we'll reuse it
//enhance slew is arcsin(): cutting it back is sin()
iirCorrectL += inputSampleL - differenceL;
inputSampleL = differenceL;
iirCorrectR += inputSampleR - differenceR;
inputSampleR = differenceR;
//apply the slew to stored value: can develop DC offsets.
//store the change we made so we can dial it back
lastFXChannelL = inputSampleL;
lastFXChannelR = inputSampleR;
if (lastFXChannelL > 1.0) lastFXChannelL = 1.0;
if (lastFXChannelL < -1.0) lastFXChannelL = -1.0;
if (lastFXChannelR > 1.0) lastFXChannelR = 1.0;
if (lastFXChannelR < -1.0) lastFXChannelR = -1.0;
//store current sample as new base for next offset
nearZeroL = pow(fabs(fabs(lastFXChannelL)-1.0), 2);
nearZeroR = pow(fabs(fabs(lastFXChannelR)-1.0), 2);
//if the sample is very near zero this number is higher.
if (iirCorrectL > 0) iirCorrectL -= servoTrim;
if (iirCorrectL < 0) iirCorrectL += servoTrim;
if (iirCorrectR > 0) iirCorrectR -= servoTrim;
if (iirCorrectR < 0) iirCorrectR += servoTrim;
//cut back the servo by which we're pulling back the DC
lastFXChannelL += (iirCorrectL * 0.0000005);
lastFXChannelR += (iirCorrectR * 0.0000005);
//apply the servo to the stored value, pulling back the DC
lastFXChannelL *= (1.0 - (nearZeroL * bassTrim));
lastFXChannelR *= (1.0 - (nearZeroR * bassTrim));
//this cuts back the DC offset directly, relative to how near zero we are
if (inputSampleL > 1.57079633) inputSampleL= 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
//amplitude aspect
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
//amplitude aspect
//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 Console5Channel::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 = A;
double differenceL;
double differenceR;
double nearZeroL;
double nearZeroR;
double servoTrim = 0.0000001 / overallscale;
double bassTrim = 0.005 / overallscale;
long double inputSampleL;
long double inputSampleR;
if (settingchase != inputgain) {
chasespeed *= 2.0;
settingchase = inputgain;
}
if (chasespeed > 2500.0) chasespeed = 2500.0;
if (gainchase < 0.0) gainchase = inputgain;
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.
}
chasespeed *= 0.9999;
chasespeed -= 0.01;
if (chasespeed < 350.0) chasespeed = 350.0;
//we have our chase speed compensated for recent fader activity
gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0));
//gainchase is chasing the target, as a simple multiply gain factor
if (1.0 != gainchase) {
inputSampleL *= gainchase;
inputSampleR *= gainchase;
}
//done with trim control
differenceL = lastSampleChannelL - inputSampleL;
lastSampleChannelL = inputSampleL;
differenceR = lastSampleChannelR - inputSampleR;
lastSampleChannelR = inputSampleR;
//derive slew part off direct sample measurement + from last time
if (differenceL > 1.0) differenceL = 1.0;
if (differenceL < -1.0) differenceL = -1.0;
if (differenceR > 1.0) differenceR = 1.0;
if (differenceR < -1.0) differenceR = -1.0;
//clamp the slew correction to prevent invalid math results
differenceL = lastFXChannelL + asin(differenceL);
differenceR = lastFXChannelR + asin(differenceR);
//we're about to use this twice and then not use difference again, so we'll reuse it
//enhance slew is arcsin(): cutting it back is sin()
iirCorrectL += inputSampleL - differenceL;
inputSampleL = differenceL;
iirCorrectR += inputSampleR - differenceR;
inputSampleR = differenceR;
//apply the slew to stored value: can develop DC offsets.
//store the change we made so we can dial it back
lastFXChannelL = inputSampleL;
lastFXChannelR = inputSampleR;
if (lastFXChannelL > 1.0) lastFXChannelL = 1.0;
if (lastFXChannelL < -1.0) lastFXChannelL = -1.0;
if (lastFXChannelR > 1.0) lastFXChannelR = 1.0;
if (lastFXChannelR < -1.0) lastFXChannelR = -1.0;
//store current sample as new base for next offset
nearZeroL = pow(fabs(fabs(lastFXChannelL)-1.0), 2);
nearZeroR = pow(fabs(fabs(lastFXChannelR)-1.0), 2);
//if the sample is very near zero this number is higher.
if (iirCorrectL > 0) iirCorrectL -= servoTrim;
if (iirCorrectL < 0) iirCorrectL += servoTrim;
if (iirCorrectR > 0) iirCorrectR -= servoTrim;
if (iirCorrectR < 0) iirCorrectR += servoTrim;
//cut back the servo by which we're pulling back the DC
lastFXChannelL += (iirCorrectL * 0.0000005);
lastFXChannelR += (iirCorrectR * 0.0000005);
//apply the servo to the stored value, pulling back the DC
lastFXChannelL *= (1.0 - (nearZeroL * bassTrim));
lastFXChannelR *= (1.0 - (nearZeroR * bassTrim));
//this cuts back the DC offset directly, relative to how near zero we are
if (inputSampleL > 1.57079633) inputSampleL= 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
//amplitude aspect
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
//amplitude aspect
//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++;
}
}
