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airwindows/plugins/MacVST/Channel9/source/Channel9Proc.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/* ========================================
* Channel9 - Channel9.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __Channel9_H
#include "Channel9.h"
#endif
void Channel9::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 localiirAmount = iirAmount / overallscale;
double localthreshold = threshold; //we've learned not to try and adjust threshold for sample rate
double density = B*2.0; //0-2
double phattity = density - 1.0;
if (density > 1.0) density = 1.0; //max out at full wet for Spiral aspect
if (phattity < 0.0) phattity = 0.0; //
double nonLin = 5.0-density; //number is smaller for more intense, larger for more subtle
biquadB[0] = biquadA[0] = cutoff / getSampleRate();
biquadA[1] = 1.618033988749894848204586;
biquadB[1] = 0.618033988749894848204586;
double K = tan(M_PI * biquadA[0]); //lowpass
double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
biquadA[2] = K * K * norm;
biquadA[3] = 2.0 * biquadA[2];
biquadA[4] = biquadA[2];
biquadA[5] = 2.0 * (K * K - 1.0) * norm;
biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm;
K = tan(M_PI * biquadA[0]);
norm = 1.0 / (1.0 + K / biquadB[1] + K * K);
biquadB[2] = K * K * norm;
biquadB[3] = 2.0 * biquadB[2];
biquadB[4] = biquadB[2];
biquadB[5] = 2.0 * (K * K - 1.0) * norm;
biquadB[6] = (1.0 - K / biquadB[1] + K * K) * norm;
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 tempSample;
if (biquadA[0] < 0.49999) {
tempSample = biquadA[2]*inputSampleL+biquadA[3]*biquadA[7]+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10];
biquadA[8] = biquadA[7]; biquadA[7] = inputSampleL; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleL = tempSample;
biquadA[10] = biquadA[9]; biquadA[9] = inputSampleL; //DF1 left
tempSample = biquadA[2]*inputSampleR+biquadA[3]*biquadA[11]+biquadA[4]*biquadA[12]-biquadA[5]*biquadA[13]-biquadA[6]*biquadA[14];
biquadA[12] = biquadA[11]; biquadA[11] = inputSampleR; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleR = tempSample;
biquadA[14] = biquadA[13]; biquadA[13] = inputSampleR; //DF1 right
}
double dielectricScaleL = fabs(2.0-((inputSampleL+nonLin)/nonLin));
double dielectricScaleR = fabs(2.0-((inputSampleR+nonLin)/nonLin));
if (flip)
{
if (fabs(iirSampleLA)<1.18e-37) iirSampleLA = 0.0;
iirSampleLA = (iirSampleLA * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
inputSampleL = inputSampleL - iirSampleLA;
if (fabs(iirSampleRA)<1.18e-37) iirSampleRA = 0.0;
iirSampleRA = (iirSampleRA * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
inputSampleR = inputSampleR - iirSampleRA;
}
else
{
if (fabs(iirSampleLB)<1.18e-37) iirSampleLB = 0.0;
iirSampleLB = (iirSampleLB * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
inputSampleL = inputSampleL - iirSampleLB;
if (fabs(iirSampleRB)<1.18e-37) iirSampleRB = 0.0;
iirSampleRB = (iirSampleRB * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
inputSampleR = inputSampleR - iirSampleRB;
}
//highpass section
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
double phatSampleL = sin(inputSampleL * 1.57079633);
inputSampleL *= 1.2533141373155;
//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
double distSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
inputSampleL = distSampleL; //purest form is full Spiral
if (density < 1.0) inputSampleL = (drySampleL*(1-density))+(distSampleL*density); //fade Spiral aspect
if (phattity > 0.0) inputSampleL = (inputSampleL*(1-phattity))+(phatSampleL*phattity); //apply original Density on top
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
double phatSampleR = sin(inputSampleR * 1.57079633);
inputSampleR *= 1.2533141373155;
//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
double distSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
inputSampleR = distSampleR; //purest form is full Spiral
if (density < 1.0) inputSampleR = (drySampleR*(1-density))+(distSampleR*density); //fade Spiral aspect
if (phattity > 0.0) inputSampleR = (inputSampleR*(1-phattity))+(phatSampleR*phattity); //apply original Density on top
//begin L
double clamp = (lastSampleBL - lastSampleCL) * 0.381966011250105;
clamp -= (lastSampleAL - lastSampleBL) * 0.6180339887498948482045;
clamp += inputSampleL - lastSampleAL; //regular slew clamping added
lastSampleCL = lastSampleBL;
lastSampleBL = lastSampleAL;
lastSampleAL = inputSampleL; //now our output relates off lastSampleB
if (clamp > localthreshold)
inputSampleL = lastSampleBL + localthreshold;
if (-clamp > localthreshold)
inputSampleL = lastSampleBL - localthreshold;
lastSampleAL = (lastSampleAL*0.381966011250105)+(inputSampleL*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
//end L
//begin R
clamp = (lastSampleBR - lastSampleCR) * 0.381966011250105;
clamp -= (lastSampleAR - lastSampleBR) * 0.6180339887498948482045;
clamp += inputSampleR - lastSampleAR; //regular slew clamping added
lastSampleCR = lastSampleBR;
lastSampleBR = lastSampleAR;
lastSampleAR = inputSampleR; //now our output relates off lastSampleB
if (clamp > localthreshold)
inputSampleR = lastSampleBR + localthreshold;
if (-clamp > localthreshold)
inputSampleR = lastSampleBR - localthreshold;
lastSampleAR = (lastSampleAR*0.381966011250105)+(inputSampleR*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
//end R
flip = !flip;
if (C < 1.0) {
inputSampleL *= C;
inputSampleR *= C;
}
if (biquadB[0] < 0.49999) {
tempSample = biquadB[2]*inputSampleL+biquadB[3]*biquadB[7]+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10];
biquadB[8] = biquadB[7]; biquadB[7] = inputSampleL; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleL = tempSample;
biquadB[10] = biquadB[9]; biquadB[9] = inputSampleL; //DF1 left
tempSample = biquadB[2]*inputSampleR+biquadB[3]*biquadB[11]+biquadB[4]*biquadB[12]-biquadB[5]*biquadB[13]-biquadB[6]*biquadB[14];
biquadB[12] = biquadB[11]; biquadB[11] = inputSampleR; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleR = tempSample;
biquadB[14] = biquadB[13]; biquadB[13] = inputSampleR; //DF1 right
}
//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 Channel9::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 localiirAmount = iirAmount / overallscale;
double localthreshold = threshold; //we've learned not to try and adjust threshold for sample rate
double density = B*2.0; //0-2
double phattity = density - 1.0;
if (density > 1.0) density = 1.0; //max out at full wet for Spiral aspect
if (phattity < 0.0) phattity = 0.0; //
double nonLin = 5.0-density; //number is smaller for more intense, larger for more subtle
biquadB[0] = biquadA[0] = cutoff / getSampleRate();
biquadA[1] = 1.618033988749894848204586;
biquadB[1] = 0.618033988749894848204586;
double K = tan(M_PI * biquadA[0]); //lowpass
double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
biquadA[2] = K * K * norm;
biquadA[3] = 2.0 * biquadA[2];
biquadA[4] = biquadA[2];
biquadA[5] = 2.0 * (K * K - 1.0) * norm;
biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm;
K = tan(M_PI * biquadA[0]);
norm = 1.0 / (1.0 + K / biquadB[1] + K * K);
biquadB[2] = K * K * norm;
biquadB[3] = 2.0 * biquadB[2];
biquadB[4] = biquadB[2];
biquadB[5] = 2.0 * (K * K - 1.0) * norm;
biquadB[6] = (1.0 - K / biquadB[1] + K * K) * norm;
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 tempSample;
if (biquadA[0] < 0.49999) {
tempSample = biquadA[2]*inputSampleL+biquadA[3]*biquadA[7]+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10];
biquadA[8] = biquadA[7]; biquadA[7] = inputSampleL; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleL = tempSample;
biquadA[10] = biquadA[9]; biquadA[9] = inputSampleL; //DF1 left
tempSample = biquadA[2]*inputSampleR+biquadA[3]*biquadA[11]+biquadA[4]*biquadA[12]-biquadA[5]*biquadA[13]-biquadA[6]*biquadA[14];
biquadA[12] = biquadA[11]; biquadA[11] = inputSampleR; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleR = tempSample;
biquadA[14] = biquadA[13]; biquadA[13] = inputSampleR; //DF1 right
}
double dielectricScaleL = fabs(2.0-((inputSampleL+nonLin)/nonLin));
double dielectricScaleR = fabs(2.0-((inputSampleR+nonLin)/nonLin));
if (flip)
{
if (fabs(iirSampleLA)<1.18e-37) iirSampleLA = 0.0;
iirSampleLA = (iirSampleLA * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
inputSampleL = inputSampleL - iirSampleLA;
if (fabs(iirSampleRA)<1.18e-37) iirSampleRA = 0.0;
iirSampleRA = (iirSampleRA * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
inputSampleR = inputSampleR - iirSampleRA;
}
else
{
if (fabs(iirSampleLB)<1.18e-37) iirSampleLB = 0.0;
iirSampleLB = (iirSampleLB * (1.0 - (localiirAmount * dielectricScaleL))) + (inputSampleL * localiirAmount * dielectricScaleL);
inputSampleL = inputSampleL - iirSampleLB;
if (fabs(iirSampleRB)<1.18e-37) iirSampleRB = 0.0;
iirSampleRB = (iirSampleRB * (1.0 - (localiirAmount * dielectricScaleR))) + (inputSampleR * localiirAmount * dielectricScaleR);
inputSampleR = inputSampleR - iirSampleRB;
}
//highpass section
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
if (inputSampleL > 1.0) inputSampleL = 1.0;
if (inputSampleL < -1.0) inputSampleL = -1.0;
double phatSampleL = sin(inputSampleL * 1.57079633);
inputSampleL *= 1.2533141373155;
//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
double distSampleL = sin(inputSampleL * fabs(inputSampleL)) / ((fabs(inputSampleL) == 0.0) ?1:fabs(inputSampleL));
inputSampleL = distSampleL; //purest form is full Spiral
if (density < 1.0) inputSampleL = (drySampleL*(1-density))+(distSampleL*density); //fade Spiral aspect
if (phattity > 0.0) inputSampleL = (inputSampleL*(1-phattity))+(phatSampleL*phattity); //apply original Density on top
if (inputSampleR > 1.0) inputSampleR = 1.0;
if (inputSampleR < -1.0) inputSampleR = -1.0;
double phatSampleR = sin(inputSampleR * 1.57079633);
inputSampleR *= 1.2533141373155;
//clip to 1.2533141373155 to reach maximum output, or 1.57079633 for pure sine 'phat' version
double distSampleR = sin(inputSampleR * fabs(inputSampleR)) / ((fabs(inputSampleR) == 0.0) ?1:fabs(inputSampleR));
inputSampleR = distSampleR; //purest form is full Spiral
if (density < 1.0) inputSampleR = (drySampleR*(1-density))+(distSampleR*density); //fade Spiral aspect
if (phattity > 0.0) inputSampleR = (inputSampleR*(1-phattity))+(phatSampleR*phattity); //apply original Density on top
//begin L
double clamp = (lastSampleBL - lastSampleCL) * 0.381966011250105;
clamp -= (lastSampleAL - lastSampleBL) * 0.6180339887498948482045;
clamp += inputSampleL - lastSampleAL; //regular slew clamping added
lastSampleCL = lastSampleBL;
lastSampleBL = lastSampleAL;
lastSampleAL = inputSampleL; //now our output relates off lastSampleB
if (clamp > localthreshold)
inputSampleL = lastSampleBL + localthreshold;
if (-clamp > localthreshold)
inputSampleL = lastSampleBL - localthreshold;
lastSampleAL = (lastSampleAL*0.381966011250105)+(inputSampleL*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
//end L
//begin R
clamp = (lastSampleBR - lastSampleCR) * 0.381966011250105;
clamp -= (lastSampleAR - lastSampleBR) * 0.6180339887498948482045;
clamp += inputSampleR - lastSampleAR; //regular slew clamping added
lastSampleCR = lastSampleBR;
lastSampleBR = lastSampleAR;
lastSampleAR = inputSampleR; //now our output relates off lastSampleB
if (clamp > localthreshold)
inputSampleR = lastSampleBR + localthreshold;
if (-clamp > localthreshold)
inputSampleR = lastSampleBR - localthreshold;
lastSampleAR = (lastSampleAR*0.381966011250105)+(inputSampleR*0.6180339887498948482045); //split the difference between raw and smoothed for buffer
//end R
flip = !flip;
if (C < 1.0) {
inputSampleL *= C;
inputSampleR *= C;
}
if (biquadB[0] < 0.49999) {
tempSample = biquadB[2]*inputSampleL+biquadB[3]*biquadB[7]+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10];
biquadB[8] = biquadB[7]; biquadB[7] = inputSampleL; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleL = tempSample;
biquadB[10] = biquadB[9]; biquadB[9] = inputSampleL; //DF1 left
tempSample = biquadB[2]*inputSampleR+biquadB[3]*biquadB[11]+biquadB[4]*biquadB[12]-biquadB[5]*biquadB[13]-biquadB[6]*biquadB[14];
biquadB[12] = biquadB[11]; biquadB[11] = inputSampleR; if (fabs(tempSample)<1.18e-37) tempSample = 0.0; inputSampleR = tempSample;
biquadB[14] = biquadB[13]; biquadB[13] = inputSampleR; //DF1 right
}
//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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