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airwindows/plugins/MacVST/UnBox/source/UnBoxProc.cpp
Christopher Johnson 32162deab5 to Avermatrix, signed
2022-02-28 02:13:35 -05:00

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/* ========================================
* UnBox - UnBox.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __UnBox_H
#include "UnBox.h"
#endif
void UnBox::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 input = A*2.0;
double unbox = B+1.0;
unbox *= unbox; //let's get some more gain into this
double iirAmount = (unbox*0.00052)/overallscale;
double output = C*2.0;
double treble = unbox; //averaging taps 1-4
double gain = treble;
if (gain > 1.0) {e[0] = 1.0; gain -= 1.0;} else {e[0] = gain; gain = 0.0;}
if (gain > 1.0) {e[1] = 1.0; gain -= 1.0;} else {e[1] = gain; gain = 0.0;}
if (gain > 1.0) {e[2] = 1.0; gain -= 1.0;} else {e[2] = gain; gain = 0.0;}
if (gain > 1.0) {e[3] = 1.0; gain -= 1.0;} else {e[3] = gain; gain = 0.0;}
if (gain > 1.0) {e[4] = 1.0; gain -= 1.0;} else {e[4] = gain; gain = 0.0;}
//there, now we have a neat little moving average with remainders
if (treble < 1.0) treble = 1.0;
e[0] /= treble;
e[1] /= treble;
e[2] /= treble;
e[3] /= treble;
e[4] /= treble;
//and now it's neatly scaled, too
treble = unbox*2.0; //averaging taps 1-8
gain = treble;
if (gain > 1.0) {f[0] = 1.0; gain -= 1.0;} else {f[0] = gain; gain = 0.0;}
if (gain > 1.0) {f[1] = 1.0; gain -= 1.0;} else {f[1] = gain; gain = 0.0;}
if (gain > 1.0) {f[2] = 1.0; gain -= 1.0;} else {f[2] = gain; gain = 0.0;}
if (gain > 1.0) {f[3] = 1.0; gain -= 1.0;} else {f[3] = gain; gain = 0.0;}
if (gain > 1.0) {f[4] = 1.0; gain -= 1.0;} else {f[4] = gain; gain = 0.0;}
if (gain > 1.0) {f[5] = 1.0; gain -= 1.0;} else {f[5] = gain; gain = 0.0;}
if (gain > 1.0) {f[6] = 1.0; gain -= 1.0;} else {f[6] = gain; gain = 0.0;}
if (gain > 1.0) {f[7] = 1.0; gain -= 1.0;} else {f[7] = gain; gain = 0.0;}
if (gain > 1.0) {f[8] = 1.0; gain -= 1.0;} else {f[8] = gain; gain = 0.0;}
if (gain > 1.0) {f[9] = 1.0; gain -= 1.0;} else {f[9] = gain; gain = 0.0;}
//there, now we have a neat little moving average with remainders
if (treble < 1.0) treble = 1.0;
f[0] /= treble;
f[1] /= treble;
f[2] /= treble;
f[3] /= treble;
f[4] /= treble;
f[5] /= treble;
f[6] /= treble;
f[7] /= treble;
f[8] /= treble;
f[9] /= treble;
//and now it's neatly scaled, too
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (input != 1.0) {inputSampleL *= input; inputSampleR *= input;}
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;
aL[4] = aL[3]; aL[3] = aL[2]; aL[2] = aL[1];
aL[1] = aL[0]; aL[0] = inputSampleL;
inputSampleL *= e[0];
inputSampleL += (aL[1] * e[1]);
inputSampleL += (aL[2] * e[2]);
inputSampleL += (aL[3] * e[3]);
inputSampleL += (aL[4] * e[4]);
//this is now an average of inputSampleL
aR[4] = aR[3]; aR[3] = aR[2]; aR[2] = aR[1];
aR[1] = aR[0]; aR[0] = inputSampleR;
inputSampleR *= e[0];
inputSampleR += (aR[1] * e[1]);
inputSampleR += (aR[2] * e[2]);
inputSampleR += (aR[3] * e[3]);
inputSampleR += (aR[4] * e[4]);
//this is now an average of inputSampleR
bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1];
bL[1] = bL[0]; bL[0] = inputSampleL;
inputSampleL *= e[0];
inputSampleL += (bL[1] * e[1]);
inputSampleL += (bL[2] * e[2]);
inputSampleL += (bL[3] * e[3]);
inputSampleL += (bL[4] * e[4]);
//this is now an average of an average of inputSampleL. Two poles
bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1];
bR[1] = bR[0]; bR[0] = inputSampleR;
inputSampleR *= e[0];
inputSampleR += (bR[1] * e[1]);
inputSampleR += (bR[2] * e[2]);
inputSampleR += (bR[3] * e[3]);
inputSampleR += (bR[4] * e[4]);
//this is now an average of an average of inputSampleR. Two poles
inputSampleL *= unbox;
inputSampleR *= unbox;
//clip to 1.2533141373155 to reach maximum output
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
inputSampleL /= unbox;
inputSampleR /= unbox;
//now we have a distorted inputSample at the correct volume relative to drySample
double accumulatorSampleL = (drySampleL - inputSampleL);
cL[9] = cL[8]; cL[8] = cL[7]; cL[7] = cL[6]; cL[6] = cL[5];
cL[5] = cL[4]; cL[4] = cL[3]; cL[3] = cL[2]; cL[2] = cL[1];
cL[1] = cL[0]; cL[0] = accumulatorSampleL;
accumulatorSampleL *= f[0];
accumulatorSampleL += (cL[1] * f[1]);
accumulatorSampleL += (cL[2] * f[2]);
accumulatorSampleL += (cL[3] * f[3]);
accumulatorSampleL += (cL[4] * f[4]);
accumulatorSampleL += (cL[5] * f[5]);
accumulatorSampleL += (cL[6] * f[6]);
accumulatorSampleL += (cL[7] * f[7]);
accumulatorSampleL += (cL[8] * f[8]);
accumulatorSampleL += (cL[9] * f[9]);
//this is now an average of all the recent variances from dry
double accumulatorSampleR = (drySampleR - inputSampleR);
cR[9] = cR[8]; cR[8] = cR[7]; cR[7] = cR[6]; cR[6] = cR[5];
cR[5] = cR[4]; cR[4] = cR[3]; cR[3] = cR[2]; cR[2] = cR[1];
cR[1] = cR[0]; cR[0] = accumulatorSampleR;
accumulatorSampleR *= f[0];
accumulatorSampleR += (cR[1] * f[1]);
accumulatorSampleR += (cR[2] * f[2]);
accumulatorSampleR += (cR[3] * f[3]);
accumulatorSampleR += (cR[4] * f[4]);
accumulatorSampleR += (cR[5] * f[5]);
accumulatorSampleR += (cR[6] * f[6]);
accumulatorSampleR += (cR[7] * f[7]);
accumulatorSampleR += (cR[8] * f[8]);
accumulatorSampleR += (cR[9] * f[9]);
//this is now an average of all the recent variances from dry
iirSampleAL = (iirSampleAL * (1 - iirAmount)) + (accumulatorSampleL * iirAmount);
accumulatorSampleL -= iirSampleAL;
//two poles of IIR
iirSampleAR = (iirSampleAR * (1 - iirAmount)) + (accumulatorSampleR * iirAmount);
accumulatorSampleR -= iirSampleAR;
//two poles of IIR
iirSampleBL = (iirSampleBL * (1 - iirAmount)) + (accumulatorSampleL * iirAmount);
accumulatorSampleL -= iirSampleBL;
//highpass section
iirSampleBR = (iirSampleBR * (1 - iirAmount)) + (accumulatorSampleR * iirAmount);
accumulatorSampleR -= iirSampleBR;
//highpass section
//this is now a highpassed average of all the recent variances from dry
inputSampleL = drySampleL - accumulatorSampleL;
inputSampleR = drySampleR - accumulatorSampleR;
//we apply it as one operation, to get the result.
if (output != 1.0) {inputSampleL *= output; inputSampleR *= output;}
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleL += static_cast<int32_t>(fpd) * 5.960464655174751e-36L * pow(2,expon+62);
frexpf((float)inputSampleR, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleR += static_cast<int32_t>(fpd) * 5.960464655174751e-36L * pow(2,expon+62);
//end 32 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void UnBox::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 input = A*2.0;
double unbox = B+1.0;
unbox *= unbox; //let's get some more gain into this
double iirAmount = (unbox*0.00052)/overallscale;
double output = C*2.0;
double treble = unbox; //averaging taps 1-4
double gain = treble;
if (gain > 1.0) {e[0] = 1.0; gain -= 1.0;} else {e[0] = gain; gain = 0.0;}
if (gain > 1.0) {e[1] = 1.0; gain -= 1.0;} else {e[1] = gain; gain = 0.0;}
if (gain > 1.0) {e[2] = 1.0; gain -= 1.0;} else {e[2] = gain; gain = 0.0;}
if (gain > 1.0) {e[3] = 1.0; gain -= 1.0;} else {e[3] = gain; gain = 0.0;}
if (gain > 1.0) {e[4] = 1.0; gain -= 1.0;} else {e[4] = gain; gain = 0.0;}
//there, now we have a neat little moving average with remainders
if (treble < 1.0) treble = 1.0;
e[0] /= treble;
e[1] /= treble;
e[2] /= treble;
e[3] /= treble;
e[4] /= treble;
//and now it's neatly scaled, too
treble = unbox*2.0; //averaging taps 1-8
gain = treble;
if (gain > 1.0) {f[0] = 1.0; gain -= 1.0;} else {f[0] = gain; gain = 0.0;}
if (gain > 1.0) {f[1] = 1.0; gain -= 1.0;} else {f[1] = gain; gain = 0.0;}
if (gain > 1.0) {f[2] = 1.0; gain -= 1.0;} else {f[2] = gain; gain = 0.0;}
if (gain > 1.0) {f[3] = 1.0; gain -= 1.0;} else {f[3] = gain; gain = 0.0;}
if (gain > 1.0) {f[4] = 1.0; gain -= 1.0;} else {f[4] = gain; gain = 0.0;}
if (gain > 1.0) {f[5] = 1.0; gain -= 1.0;} else {f[5] = gain; gain = 0.0;}
if (gain > 1.0) {f[6] = 1.0; gain -= 1.0;} else {f[6] = gain; gain = 0.0;}
if (gain > 1.0) {f[7] = 1.0; gain -= 1.0;} else {f[7] = gain; gain = 0.0;}
if (gain > 1.0) {f[8] = 1.0; gain -= 1.0;} else {f[8] = gain; gain = 0.0;}
if (gain > 1.0) {f[9] = 1.0; gain -= 1.0;} else {f[9] = gain; gain = 0.0;}
//there, now we have a neat little moving average with remainders
if (treble < 1.0) treble = 1.0;
f[0] /= treble;
f[1] /= treble;
f[2] /= treble;
f[3] /= treble;
f[4] /= treble;
f[5] /= treble;
f[6] /= treble;
f[7] /= treble;
f[8] /= treble;
f[9] /= treble;
//and now it's neatly scaled, too
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (input != 1.0) {inputSampleL *= input; inputSampleR *= input;}
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;
aL[4] = aL[3]; aL[3] = aL[2]; aL[2] = aL[1];
aL[1] = aL[0]; aL[0] = inputSampleL;
inputSampleL *= e[0];
inputSampleL += (aL[1] * e[1]);
inputSampleL += (aL[2] * e[2]);
inputSampleL += (aL[3] * e[3]);
inputSampleL += (aL[4] * e[4]);
//this is now an average of inputSampleL
aR[4] = aR[3]; aR[3] = aR[2]; aR[2] = aR[1];
aR[1] = aR[0]; aR[0] = inputSampleR;
inputSampleR *= e[0];
inputSampleR += (aR[1] * e[1]);
inputSampleR += (aR[2] * e[2]);
inputSampleR += (aR[3] * e[3]);
inputSampleR += (aR[4] * e[4]);
//this is now an average of inputSampleR
bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1];
bL[1] = bL[0]; bL[0] = inputSampleL;
inputSampleL *= e[0];
inputSampleL += (bL[1] * e[1]);
inputSampleL += (bL[2] * e[2]);
inputSampleL += (bL[3] * e[3]);
inputSampleL += (bL[4] * e[4]);
//this is now an average of an average of inputSampleL. Two poles
bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1];
bR[1] = bR[0]; bR[0] = inputSampleR;
inputSampleR *= e[0];
inputSampleR += (bR[1] * e[1]);
inputSampleR += (bR[2] * e[2]);
inputSampleR += (bR[3] * e[3]);
inputSampleR += (bR[4] * e[4]);
//this is now an average of an average of inputSampleR. Two poles
inputSampleL *= unbox;
inputSampleR *= unbox;
//clip to 1.2533141373155 to reach maximum output
if (inputSampleL > 1.2533141373155) inputSampleL = 1.2533141373155;
if (inputSampleL < -1.2533141373155) inputSampleL = -1.2533141373155;
inputSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
if (inputSampleR > 1.2533141373155) inputSampleR = 1.2533141373155;
if (inputSampleR < -1.2533141373155) inputSampleR = -1.2533141373155;
inputSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
inputSampleL /= unbox;
inputSampleR /= unbox;
//now we have a distorted inputSample at the correct volume relative to drySample
double accumulatorSampleL = (drySampleL - inputSampleL);
cL[9] = cL[8]; cL[8] = cL[7]; cL[7] = cL[6]; cL[6] = cL[5];
cL[5] = cL[4]; cL[4] = cL[3]; cL[3] = cL[2]; cL[2] = cL[1];
cL[1] = cL[0]; cL[0] = accumulatorSampleL;
accumulatorSampleL *= f[0];
accumulatorSampleL += (cL[1] * f[1]);
accumulatorSampleL += (cL[2] * f[2]);
accumulatorSampleL += (cL[3] * f[3]);
accumulatorSampleL += (cL[4] * f[4]);
accumulatorSampleL += (cL[5] * f[5]);
accumulatorSampleL += (cL[6] * f[6]);
accumulatorSampleL += (cL[7] * f[7]);
accumulatorSampleL += (cL[8] * f[8]);
accumulatorSampleL += (cL[9] * f[9]);
//this is now an average of all the recent variances from dry
double accumulatorSampleR = (drySampleR - inputSampleR);
cR[9] = cR[8]; cR[8] = cR[7]; cR[7] = cR[6]; cR[6] = cR[5];
cR[5] = cR[4]; cR[4] = cR[3]; cR[3] = cR[2]; cR[2] = cR[1];
cR[1] = cR[0]; cR[0] = accumulatorSampleR;
accumulatorSampleR *= f[0];
accumulatorSampleR += (cR[1] * f[1]);
accumulatorSampleR += (cR[2] * f[2]);
accumulatorSampleR += (cR[3] * f[3]);
accumulatorSampleR += (cR[4] * f[4]);
accumulatorSampleR += (cR[5] * f[5]);
accumulatorSampleR += (cR[6] * f[6]);
accumulatorSampleR += (cR[7] * f[7]);
accumulatorSampleR += (cR[8] * f[8]);
accumulatorSampleR += (cR[9] * f[9]);
//this is now an average of all the recent variances from dry
iirSampleAL = (iirSampleAL * (1 - iirAmount)) + (accumulatorSampleL * iirAmount);
accumulatorSampleL -= iirSampleAL;
//two poles of IIR
iirSampleAR = (iirSampleAR * (1 - iirAmount)) + (accumulatorSampleR * iirAmount);
accumulatorSampleR -= iirSampleAR;
//two poles of IIR
iirSampleBL = (iirSampleBL * (1 - iirAmount)) + (accumulatorSampleL * iirAmount);
accumulatorSampleL -= iirSampleBL;
//highpass section
iirSampleBR = (iirSampleBR * (1 - iirAmount)) + (accumulatorSampleR * iirAmount);
accumulatorSampleR -= iirSampleBR;
//highpass section
//this is now a highpassed average of all the recent variances from dry
inputSampleL = drySampleL - accumulatorSampleL;
inputSampleR = drySampleR - accumulatorSampleR;
//we apply it as one operation, to get the result.
if (output != 1.0) {inputSampleL *= output; inputSampleR *= output;}
//begin 64 bit stereo floating point dither
int expon; frexp((double)inputSampleL, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleL += static_cast<int32_t>(fpd) * 1.110223024625156e-44L * pow(2,expon+62);
frexp((double)inputSampleR, &expon);
fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5;
inputSampleR += static_cast<int32_t>(fpd) * 1.110223024625156e-44L * pow(2,expon+62);
//end 64 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
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