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airwindows/plugins/MacSignedVST/Pressure5/source/Pressure5Proc.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/* ========================================
* Pressure5 - Pressure5.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __Pressure5_H
#include "Pressure5.h"
#endif
void Pressure5::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();
int spacing = floor(overallscale); //should give us working basic scaling, usually 2 or 4
if (spacing < 1) spacing = 1; if (spacing > 16) spacing = 16;
double threshold = 1.0 - (A * 0.95);
double muMakeupGain = 1.0 / threshold;
//gain settings around threshold
double release = pow((1.28-B),5)*32768.0;
double fastest = sqrt(release);
release /= overallscale;
fastest /= overallscale;
//speed settings around release
double mewinessRef = C;
double pawsClaws = -(D-0.5)*1.618033988749894848204586;
// µ µ µ µ µ µ µ µ µ µ µ µ is the kitten song o/~
double outputGain = pow(E*2.0,2); //max 4.0 gain
double wet = F;
fixA[fix_freq] = 24000.0 / getSampleRate();
fixA[fix_reso] = 0.7071; //butterworth Q
double K = tan(M_PI * fixA[fix_freq]);
double norm = 1.0 / (1.0 + K / fixA[fix_reso] + K * K);
fixA[fix_a0] = K * K * norm;
fixA[fix_a1] = 2.0 * fixA[fix_a0];
fixA[fix_a2] = fixA[fix_a0];
fixA[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixA[fix_b2] = (1.0 - K / fixA[fix_reso] + K * K) * norm;
//for the fixed-position biquad filter
for (int x = 0; x < fix_sL1; x++) fixB[x] = fixA[x];
//make the second filter same as the first, don't use sample slots
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
inputSampleL = inputSampleL * muMakeupGain;
inputSampleR = inputSampleR * muMakeupGain;
if (fixA[fix_freq] < 0.4999) {
double temp = (inputSampleL * fixA[fix_a0]) + fixA[fix_sL1];
fixA[fix_sL1] = (inputSampleL * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sL2];
fixA[fix_sL2] = (inputSampleL * fixA[fix_a2]) - (temp * fixA[fix_b2]);
inputSampleL = temp;
temp = (inputSampleR * fixA[fix_a0]) + fixA[fix_sR1];
fixA[fix_sR1] = (inputSampleR * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sR2];
fixA[fix_sR2] = (inputSampleR * fixA[fix_a2]) - (temp * fixA[fix_b2]);
inputSampleR = temp; //fixed biquad filtering ultrasonics before Pressure
}
double inputSense = fabs(inputSampleL);
if (fabs(inputSampleR) > inputSense)
inputSense = fabs(inputSampleR);
//we will take the greater of either channel and just use that, then apply the result
//to both stereo channels.
double mewiness = sin(mewinessRef + (slewMax * pawsClaws));
bool positivemu = true; if (mewiness < 0) {positivemu = false; mewiness = -mewiness;}
if (flip)
{
if (inputSense > threshold)
{
muVary = threshold / inputSense;
muAttack = sqrt(fabs(muSpeedA));
muCoefficientA = muCoefficientA * (muAttack-1.0);
if (muVary < threshold)
{
muCoefficientA = muCoefficientA + threshold;
}
else
{
muCoefficientA = muCoefficientA + muVary;
}
muCoefficientA = muCoefficientA / muAttack;
}
else
{
muCoefficientA = muCoefficientA * ((muSpeedA * muSpeedA)-1.0);
muCoefficientA = muCoefficientA + 1.0;
muCoefficientA = muCoefficientA / (muSpeedA * muSpeedA);
}
muNewSpeed = muSpeedA * (muSpeedA-1);
muNewSpeed = muNewSpeed + fabs(inputSense*release)+fastest;
muSpeedA = muNewSpeed / muSpeedA;
}
else
{
if (inputSense > threshold)
{
muVary = threshold / inputSense;
muAttack = sqrt(fabs(muSpeedB));
muCoefficientB = muCoefficientB * (muAttack-1);
if (muVary < threshold)
{
muCoefficientB = muCoefficientB + threshold;
}
else
{
muCoefficientB = muCoefficientB + muVary;
}
muCoefficientB = muCoefficientB / muAttack;
}
else
{
muCoefficientB = muCoefficientB * ((muSpeedB * muSpeedB)-1.0);
muCoefficientB = muCoefficientB + 1.0;
muCoefficientB = muCoefficientB / (muSpeedB * muSpeedB);
}
muNewSpeed = muSpeedB * (muSpeedB-1);
muNewSpeed = muNewSpeed + fabs(inputSense*release)+fastest;
muSpeedB = muNewSpeed / muSpeedB;
}
//got coefficients, adjusted speeds
double coefficient;
if (flip) {
if (positivemu) coefficient = pow(muCoefficientA,2);
else coefficient = sqrt(muCoefficientA);
coefficient = (coefficient*mewiness)+(muCoefficientA*(1.0-mewiness));
inputSampleL *= coefficient;
inputSampleR *= coefficient;
} else {
if (positivemu) coefficient = pow(muCoefficientB,2);
else coefficient = sqrt(muCoefficientB);
coefficient = (coefficient*mewiness)+(muCoefficientB*(1.0-mewiness));
inputSampleL *= coefficient;
inputSampleR *= coefficient;
}
//applied compression with vari-vari-µ-µ-µ-µ-µ-µ-is-the-kitten-song o/~
//applied gain correction to control output level- tends to constrain sound rather than inflate it
if (outputGain != 1.0) {
inputSampleL *= outputGain;
inputSampleR *= outputGain;
}
flip = !flip;
if (fixB[fix_freq] < 0.49999) {
double temp = (inputSampleL * fixB[fix_a0]) + fixB[fix_sL1];
fixB[fix_sL1] = (inputSampleL * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sL2];
fixB[fix_sL2] = (inputSampleL * fixB[fix_a2]) - (temp * fixB[fix_b2]);
inputSampleL = temp;
temp = (inputSampleR * fixB[fix_a0]) + fixB[fix_sR1];
fixB[fix_sR1] = (inputSampleR * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sR2];
fixB[fix_sR2] = (inputSampleR * fixB[fix_a2]) - (temp * fixB[fix_b2]);
inputSampleR = temp; //fixed biquad filtering ultrasonics between Pressure and ClipOnly
}
if (wet != 1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
}
//Dry/Wet control, BEFORE ClipOnly
slewMax = fabs(inputSampleL - lastSampleL);
if (slewMax < fabs(inputSampleR - lastSampleR)) slewMax = fabs(inputSampleR - lastSampleR);
//set up for fiddling with mewiness. Largest amount of slew in any direction
//begin ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
if (inputSampleL > 4.0) inputSampleL = 4.0; if (inputSampleL < -4.0) inputSampleL = -4.0;
if (wasPosClipL == true) { //current will be over
if (inputSampleL<lastSampleL) lastSampleL=0.7058208+(inputSampleL*0.2609148);
else lastSampleL = 0.2491717+(lastSampleL*0.7390851);
} wasPosClipL = false;
if (inputSampleL>0.9549925859) {wasPosClipL=true;inputSampleL=0.7058208+(lastSampleL*0.2609148);}
if (wasNegClipL == true) { //current will be -over
if (inputSampleL > lastSampleL) lastSampleL=-0.7058208+(inputSampleL*0.2609148);
else lastSampleL=-0.2491717+(lastSampleL*0.7390851);
} wasNegClipL = false;
if (inputSampleL<-0.9549925859) {wasNegClipL=true;inputSampleL=-0.7058208+(lastSampleL*0.2609148);}
intermediateL[spacing] = inputSampleL;
inputSampleL = lastSampleL; //Latency is however many samples equals one 44.1k sample
for (int x = spacing; x > 0; x--) intermediateL[x-1] = intermediateL[x];
lastSampleL = intermediateL[0]; //run a little buffer to handle this
if (inputSampleR > 4.0) inputSampleR = 4.0; if (inputSampleR < -4.0) inputSampleR = -4.0;
if (wasPosClipR == true) { //current will be over
if (inputSampleR<lastSampleR) lastSampleR=0.7058208+(inputSampleR*0.2609148);
else lastSampleR = 0.2491717+(lastSampleR*0.7390851);
} wasPosClipR = false;
if (inputSampleR>0.9549925859) {wasPosClipR=true;inputSampleR=0.7058208+(lastSampleR*0.2609148);}
if (wasNegClipR == true) { //current will be -over
if (inputSampleR > lastSampleR) lastSampleR=-0.7058208+(inputSampleR*0.2609148);
else lastSampleR=-0.2491717+(lastSampleR*0.7390851);
} wasNegClipR = false;
if (inputSampleR<-0.9549925859) {wasNegClipR=true;inputSampleR=-0.7058208+(lastSampleR*0.2609148);}
intermediateR[spacing] = inputSampleR;
inputSampleR = lastSampleR; //Latency is however many samples equals one 44.1k sample
for (int x = spacing; x > 0; x--) intermediateR[x-1] = intermediateR[x];
lastSampleR = intermediateR[0]; //run a little buffer to handle this
//end ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
//final clip runs AFTER the Dry/Wet. It serves as a safety clip even if you're not full wet
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
inputSampleR += ((double(fpdR)-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 Pressure5::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();
int spacing = floor(overallscale); //should give us working basic scaling, usually 2 or 4
if (spacing < 1) spacing = 1; if (spacing > 16) spacing = 16;
double threshold = 1.0 - (A * 0.95);
double muMakeupGain = 1.0 / threshold;
//gain settings around threshold
double release = pow((1.28-B),5)*32768.0;
double fastest = sqrt(release);
release /= overallscale;
fastest /= overallscale;
//speed settings around release
double mewinessRef = C;
double pawsClaws = -(D-0.5)*1.618033988749894848204586;
// µ µ µ µ µ µ µ µ µ µ µ µ is the kitten song o/~
double outputGain = pow(E*2.0,2); //max 4.0 gain
double wet = F;
fixA[fix_freq] = 24000.0 / getSampleRate();
fixA[fix_reso] = 0.7071; //butterworth Q
double K = tan(M_PI * fixA[fix_freq]);
double norm = 1.0 / (1.0 + K / fixA[fix_reso] + K * K);
fixA[fix_a0] = K * K * norm;
fixA[fix_a1] = 2.0 * fixA[fix_a0];
fixA[fix_a2] = fixA[fix_a0];
fixA[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixA[fix_b2] = (1.0 - K / fixA[fix_reso] + K * K) * norm;
//for the fixed-position biquad filter
for (int x = 0; x < fix_sL1; x++) fixB[x] = fixA[x];
//make the second filter same as the first, don't use sample slots
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
inputSampleL = inputSampleL * muMakeupGain;
inputSampleR = inputSampleR * muMakeupGain;
if (fixA[fix_freq] < 0.4999) {
double temp = (inputSampleL * fixA[fix_a0]) + fixA[fix_sL1];
fixA[fix_sL1] = (inputSampleL * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sL2];
fixA[fix_sL2] = (inputSampleL * fixA[fix_a2]) - (temp * fixA[fix_b2]);
inputSampleL = temp;
temp = (inputSampleR * fixA[fix_a0]) + fixA[fix_sR1];
fixA[fix_sR1] = (inputSampleR * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sR2];
fixA[fix_sR2] = (inputSampleR * fixA[fix_a2]) - (temp * fixA[fix_b2]);
inputSampleR = temp; //fixed biquad filtering ultrasonics before Pressure
}
double inputSense = fabs(inputSampleL);
if (fabs(inputSampleR) > inputSense)
inputSense = fabs(inputSampleR);
//we will take the greater of either channel and just use that, then apply the result
//to both stereo channels.
double mewiness = sin(mewinessRef + (slewMax * pawsClaws));
bool positivemu = true; if (mewiness < 0) {positivemu = false; mewiness = -mewiness;}
if (flip)
{
if (inputSense > threshold)
{
muVary = threshold / inputSense;
muAttack = sqrt(fabs(muSpeedA));
muCoefficientA = muCoefficientA * (muAttack-1.0);
if (muVary < threshold)
{
muCoefficientA = muCoefficientA + threshold;
}
else
{
muCoefficientA = muCoefficientA + muVary;
}
muCoefficientA = muCoefficientA / muAttack;
}
else
{
muCoefficientA = muCoefficientA * ((muSpeedA * muSpeedA)-1.0);
muCoefficientA = muCoefficientA + 1.0;
muCoefficientA = muCoefficientA / (muSpeedA * muSpeedA);
}
muNewSpeed = muSpeedA * (muSpeedA-1);
muNewSpeed = muNewSpeed + fabs(inputSense*release)+fastest;
muSpeedA = muNewSpeed / muSpeedA;
}
else
{
if (inputSense > threshold)
{
muVary = threshold / inputSense;
muAttack = sqrt(fabs(muSpeedB));
muCoefficientB = muCoefficientB * (muAttack-1);
if (muVary < threshold)
{
muCoefficientB = muCoefficientB + threshold;
}
else
{
muCoefficientB = muCoefficientB + muVary;
}
muCoefficientB = muCoefficientB / muAttack;
}
else
{
muCoefficientB = muCoefficientB * ((muSpeedB * muSpeedB)-1.0);
muCoefficientB = muCoefficientB + 1.0;
muCoefficientB = muCoefficientB / (muSpeedB * muSpeedB);
}
muNewSpeed = muSpeedB * (muSpeedB-1);
muNewSpeed = muNewSpeed + fabs(inputSense*release)+fastest;
muSpeedB = muNewSpeed / muSpeedB;
}
//got coefficients, adjusted speeds
double coefficient;
if (flip) {
if (positivemu) coefficient = pow(muCoefficientA,2);
else coefficient = sqrt(muCoefficientA);
coefficient = (coefficient*mewiness)+(muCoefficientA*(1.0-mewiness));
inputSampleL *= coefficient;
inputSampleR *= coefficient;
} else {
if (positivemu) coefficient = pow(muCoefficientB,2);
else coefficient = sqrt(muCoefficientB);
coefficient = (coefficient*mewiness)+(muCoefficientB*(1.0-mewiness));
inputSampleL *= coefficient;
inputSampleR *= coefficient;
}
//applied compression with vari-vari-µ-µ-µ-µ-µ-µ-is-the-kitten-song o/~
//applied gain correction to control output level- tends to constrain sound rather than inflate it
if (outputGain != 1.0) {
inputSampleL *= outputGain;
inputSampleR *= outputGain;
}
flip = !flip;
if (fixB[fix_freq] < 0.49999) {
double temp = (inputSampleL * fixB[fix_a0]) + fixB[fix_sL1];
fixB[fix_sL1] = (inputSampleL * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sL2];
fixB[fix_sL2] = (inputSampleL * fixB[fix_a2]) - (temp * fixB[fix_b2]);
inputSampleL = temp;
temp = (inputSampleR * fixB[fix_a0]) + fixB[fix_sR1];
fixB[fix_sR1] = (inputSampleR * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sR2];
fixB[fix_sR2] = (inputSampleR * fixB[fix_a2]) - (temp * fixB[fix_b2]);
inputSampleR = temp; //fixed biquad filtering ultrasonics between Pressure and ClipOnly
}
if (wet != 1.0) {
inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
}
//Dry/Wet control, BEFORE ClipOnly
slewMax = fabs(inputSampleL - lastSampleL);
if (slewMax < fabs(inputSampleR - lastSampleR)) slewMax = fabs(inputSampleR - lastSampleR);
//set up for fiddling with mewiness. Largest amount of slew in any direction
//begin ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
if (inputSampleL > 4.0) inputSampleL = 4.0; if (inputSampleL < -4.0) inputSampleL = -4.0;
if (wasPosClipL == true) { //current will be over
if (inputSampleL<lastSampleL) lastSampleL=0.7058208+(inputSampleL*0.2609148);
else lastSampleL = 0.2491717+(lastSampleL*0.7390851);
} wasPosClipL = false;
if (inputSampleL>0.9549925859) {wasPosClipL=true;inputSampleL=0.7058208+(lastSampleL*0.2609148);}
if (wasNegClipL == true) { //current will be -over
if (inputSampleL > lastSampleL) lastSampleL=-0.7058208+(inputSampleL*0.2609148);
else lastSampleL=-0.2491717+(lastSampleL*0.7390851);
} wasNegClipL = false;
if (inputSampleL<-0.9549925859) {wasNegClipL=true;inputSampleL=-0.7058208+(lastSampleL*0.2609148);}
intermediateL[spacing] = inputSampleL;
inputSampleL = lastSampleL; //Latency is however many samples equals one 44.1k sample
for (int x = spacing; x > 0; x--) intermediateL[x-1] = intermediateL[x];
lastSampleL = intermediateL[0]; //run a little buffer to handle this
if (inputSampleR > 4.0) inputSampleR = 4.0; if (inputSampleR < -4.0) inputSampleR = -4.0;
if (wasPosClipR == true) { //current will be over
if (inputSampleR<lastSampleR) lastSampleR=0.7058208+(inputSampleR*0.2609148);
else lastSampleR = 0.2491717+(lastSampleR*0.7390851);
} wasPosClipR = false;
if (inputSampleR>0.9549925859) {wasPosClipR=true;inputSampleR=0.7058208+(lastSampleR*0.2609148);}
if (wasNegClipR == true) { //current will be -over
if (inputSampleR > lastSampleR) lastSampleR=-0.7058208+(inputSampleR*0.2609148);
else lastSampleR=-0.2491717+(lastSampleR*0.7390851);
} wasNegClipR = false;
if (inputSampleR<-0.9549925859) {wasNegClipR=true;inputSampleR=-0.7058208+(lastSampleR*0.2609148);}
intermediateR[spacing] = inputSampleR;
inputSampleR = lastSampleR; //Latency is however many samples equals one 44.1k sample
for (int x = spacing; x > 0; x--) intermediateR[x-1] = intermediateR[x];
lastSampleR = intermediateR[0]; //run a little buffer to handle this
//end ClipOnly2 stereo as a little, compressed chunk that can be dropped into code
//final clip runs AFTER the Dry/Wet. It serves as a safety clip even if you're not full wet
//begin 64 bit stereo floating point dither
//int expon; frexp((double)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//frexp((double)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
//inputSampleR += ((double(fpdR)-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++;
}
}
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