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airwindows/plugins/MacVST/Isolator2/source/Isolator2Proc.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/* ========================================
* Isolator2 - Isolator2.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __Gain_H
#include "Isolator2.h"
#endif
void Isolator2::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
biquadA[biq_freq] = pow(A,(2.0*sqrt(overallscale)))*0.4999;
if (biquadA[biq_freq] < 0.0005) biquadA[biq_freq] = 0.0005;
biquadG[biq_freq] = biquadF[biq_freq] = biquadE[biq_freq] = biquadD[biq_freq] = biquadC[biq_freq] = biquadB[biq_freq] = biquadA[biq_freq];
double reso = pow(B,2);
double resoBoost = reso+1.0;
reso = 1.0-reso;
biquadA[biq_reso] = 4.46570214 * resoBoost;
biquadB[biq_reso] = 1.51387132 * resoBoost;
biquadC[biq_reso] = 0.93979296 * resoBoost;
biquadD[biq_reso] = 0.70710678 * resoBoost;
biquadE[biq_reso] = 0.59051105 * resoBoost;
biquadF[biq_reso] = 0.52972649 * resoBoost;
biquadG[biq_reso] = 0.50316379 * resoBoost;
biquadA[biq_aA0] = biquadA[biq_aB0];
biquadA[biq_aA1] = biquadA[biq_aB1];
biquadA[biq_aA2] = biquadA[biq_aB2];
biquadA[biq_bA1] = biquadA[biq_bB1];
biquadA[biq_bA2] = biquadA[biq_bB2];
biquadB[biq_aA0] = biquadB[biq_aB0];
biquadB[biq_aA1] = biquadB[biq_aB1];
biquadB[biq_aA2] = biquadB[biq_aB2];
biquadB[biq_bA1] = biquadB[biq_bB1];
biquadB[biq_bA2] = biquadB[biq_bB2];
biquadC[biq_aA0] = biquadC[biq_aB0];
biquadC[biq_aA1] = biquadC[biq_aB1];
biquadC[biq_aA2] = biquadC[biq_aB2];
biquadC[biq_bA1] = biquadC[biq_bB1];
biquadC[biq_bA2] = biquadC[biq_bB2];
biquadD[biq_aA0] = biquadD[biq_aB0];
biquadD[biq_aA1] = biquadD[biq_aB1];
biquadD[biq_aA2] = biquadD[biq_aB2];
biquadD[biq_bA1] = biquadD[biq_bB1];
biquadD[biq_bA2] = biquadD[biq_bB2];
biquadE[biq_aA0] = biquadE[biq_aB0];
biquadE[biq_aA1] = biquadE[biq_aB1];
biquadE[biq_aA2] = biquadE[biq_aB2];
biquadE[biq_bA1] = biquadE[biq_bB1];
biquadE[biq_bA2] = biquadE[biq_bB2];
biquadF[biq_aA0] = biquadF[biq_aB0];
biquadF[biq_aA1] = biquadF[biq_aB1];
biquadF[biq_aA2] = biquadF[biq_aB2];
biquadF[biq_bA1] = biquadF[biq_bB1];
biquadF[biq_bA2] = biquadF[biq_bB2];
biquadG[biq_aA0] = biquadG[biq_aB0];
biquadG[biq_aA1] = biquadG[biq_aB1];
biquadG[biq_aA2] = biquadG[biq_aB2];
biquadG[biq_bA1] = biquadG[biq_bB1];
biquadG[biq_bA2] = biquadG[biq_bB2];
//previous run through the buffer is still in the filter, so we move it
//to the A section and now it's the new starting point.
double K = tan(M_PI * biquadA[biq_freq]);
double norm = 1.0 / (1.0 + K / biquadA[biq_reso] + K * K);
biquadA[biq_aB0] = K * K * norm;
biquadA[biq_aB1] = 2.0 * biquadA[biq_aB0];
biquadA[biq_aB2] = biquadA[biq_aB0];
biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadA[biq_bB2] = (1.0 - K / biquadA[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadB[biq_freq]);
norm = 1.0 / (1.0 + K / biquadB[biq_reso] + K * K);
biquadB[biq_aB0] = K * K * norm;
biquadB[biq_aB1] = 2.0 * biquadB[biq_aB0];
biquadB[biq_aB2] = biquadB[biq_aB0];
biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadB[biq_bB2] = (1.0 - K / biquadB[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadC[biq_freq]);
norm = 1.0 / (1.0 + K / biquadC[biq_reso] + K * K);
biquadC[biq_aB0] = K * K * norm;
biquadC[biq_aB1] = 2.0 * biquadC[biq_aB0];
biquadC[biq_aB2] = biquadC[biq_aB0];
biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadC[biq_bB2] = (1.0 - K / biquadC[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadD[biq_freq]);
norm = 1.0 / (1.0 + K / biquadD[biq_reso] + K * K);
biquadD[biq_aB0] = K * K * norm;
biquadD[biq_aB1] = 2.0 * biquadD[biq_aB0];
biquadD[biq_aB2] = biquadD[biq_aB0];
biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadD[biq_bB2] = (1.0 - K / biquadD[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadE[biq_freq]);
norm = 1.0 / (1.0 + K / biquadE[biq_reso] + K * K);
biquadE[biq_aB0] = K * K * norm;
biquadE[biq_aB1] = 2.0 * biquadE[biq_aB0];
biquadE[biq_aB2] = biquadE[biq_aB0];
biquadE[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadE[biq_bB2] = (1.0 - K / biquadE[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadF[biq_freq]);
norm = 1.0 / (1.0 + K / biquadF[biq_reso] + K * K);
biquadF[biq_aB0] = K * K * norm;
biquadF[biq_aB1] = 2.0 * biquadF[biq_aB0];
biquadF[biq_aB2] = biquadF[biq_aB0];
biquadF[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadF[biq_bB2] = (1.0 - K / biquadF[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadG[biq_freq]);
norm = 1.0 / (1.0 + K / biquadG[biq_reso] + K * K);
biquadG[biq_aB0] = K * K * norm;
biquadG[biq_aB1] = 2.0 * biquadG[biq_aB0];
biquadG[biq_aB2] = biquadG[biq_aB0];
biquadG[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadG[biq_bB2] = (1.0 - K / biquadG[biq_reso] + K * K) * norm;
bool bypass = (A == 1.0);
highA = highB;
highB = C*reso;
if (highB > 0.0) bypass = false;
lowA = lowB;
lowB = D*reso;
if (lowB < 1.0) bypass = false;
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;
double temp = (double)sampleFrames/inFramesToProcess;
biquadA[biq_a0] = (biquadA[biq_aA0]*temp)+(biquadA[biq_aB0]*(1.0-temp));
biquadA[biq_a1] = (biquadA[biq_aA1]*temp)+(biquadA[biq_aB1]*(1.0-temp));
biquadA[biq_a2] = (biquadA[biq_aA2]*temp)+(biquadA[biq_aB2]*(1.0-temp));
biquadA[biq_b1] = (biquadA[biq_bA1]*temp)+(biquadA[biq_bB1]*(1.0-temp));
biquadA[biq_b2] = (biquadA[biq_bA2]*temp)+(biquadA[biq_bB2]*(1.0-temp));
biquadB[biq_a0] = (biquadB[biq_aA0]*temp)+(biquadB[biq_aB0]*(1.0-temp));
biquadB[biq_a1] = (biquadB[biq_aA1]*temp)+(biquadB[biq_aB1]*(1.0-temp));
biquadB[biq_a2] = (biquadB[biq_aA2]*temp)+(biquadB[biq_aB2]*(1.0-temp));
biquadB[biq_b1] = (biquadB[biq_bA1]*temp)+(biquadB[biq_bB1]*(1.0-temp));
biquadB[biq_b2] = (biquadB[biq_bA2]*temp)+(biquadB[biq_bB2]*(1.0-temp));
biquadC[biq_a0] = (biquadC[biq_aA0]*temp)+(biquadC[biq_aB0]*(1.0-temp));
biquadC[biq_a1] = (biquadC[biq_aA1]*temp)+(biquadC[biq_aB1]*(1.0-temp));
biquadC[biq_a2] = (biquadC[biq_aA2]*temp)+(biquadC[biq_aB2]*(1.0-temp));
biquadC[biq_b1] = (biquadC[biq_bA1]*temp)+(biquadC[biq_bB1]*(1.0-temp));
biquadC[biq_b2] = (biquadC[biq_bA2]*temp)+(biquadC[biq_bB2]*(1.0-temp));
biquadD[biq_a0] = (biquadD[biq_aA0]*temp)+(biquadD[biq_aB0]*(1.0-temp));
biquadD[biq_a1] = (biquadD[biq_aA1]*temp)+(biquadD[biq_aB1]*(1.0-temp));
biquadD[biq_a2] = (biquadD[biq_aA2]*temp)+(biquadD[biq_aB2]*(1.0-temp));
biquadD[biq_b1] = (biquadD[biq_bA1]*temp)+(biquadD[biq_bB1]*(1.0-temp));
biquadD[biq_b2] = (biquadD[biq_bA2]*temp)+(biquadD[biq_bB2]*(1.0-temp));
biquadE[biq_a0] = (biquadE[biq_aA0]*temp)+(biquadE[biq_aB0]*(1.0-temp));
biquadE[biq_a1] = (biquadE[biq_aA1]*temp)+(biquadE[biq_aB1]*(1.0-temp));
biquadE[biq_a2] = (biquadE[biq_aA2]*temp)+(biquadE[biq_aB2]*(1.0-temp));
biquadE[biq_b1] = (biquadE[biq_bA1]*temp)+(biquadE[biq_bB1]*(1.0-temp));
biquadE[biq_b2] = (biquadE[biq_bA2]*temp)+(biquadE[biq_bB2]*(1.0-temp));
biquadF[biq_a0] = (biquadF[biq_aA0]*temp)+(biquadF[biq_aB0]*(1.0-temp));
biquadF[biq_a1] = (biquadF[biq_aA1]*temp)+(biquadF[biq_aB1]*(1.0-temp));
biquadF[biq_a2] = (biquadF[biq_aA2]*temp)+(biquadF[biq_aB2]*(1.0-temp));
biquadF[biq_b1] = (biquadF[biq_bA1]*temp)+(biquadF[biq_bB1]*(1.0-temp));
biquadF[biq_b2] = (biquadF[biq_bA2]*temp)+(biquadF[biq_bB2]*(1.0-temp));
biquadG[biq_a0] = (biquadG[biq_aA0]*temp)+(biquadG[biq_aB0]*(1.0-temp));
biquadG[biq_a1] = (biquadG[biq_aA1]*temp)+(biquadG[biq_aB1]*(1.0-temp));
biquadG[biq_a2] = (biquadG[biq_aA2]*temp)+(biquadG[biq_aB2]*(1.0-temp));
biquadG[biq_b1] = (biquadG[biq_bA1]*temp)+(biquadG[biq_bB1]*(1.0-temp));
biquadG[biq_b2] = (biquadG[biq_bA2]*temp)+(biquadG[biq_bB2]*(1.0-temp));
//this is the interpolation code for the biquad
double high = (highA*temp)+(highB*(1.0-temp));
double low = (lowA*temp)+(lowB*(1.0-temp));
double outSample = (inputSampleL * biquadA[biq_a0]) + biquadA[biq_sL1];
biquadA[biq_sL1] = (inputSampleL * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sL2];
biquadA[biq_sL2] = (inputSampleL * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadA[biq_a0]) + biquadA[biq_sR1];
biquadA[biq_sR1] = (inputSampleR * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sR2];
biquadA[biq_sR2] = (inputSampleR * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadB[biq_a0]) + biquadB[biq_sL1];
biquadB[biq_sL1] = (inputSampleL * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sL2];
biquadB[biq_sL2] = (inputSampleL * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadB[biq_a0]) + biquadB[biq_sR1];
biquadB[biq_sR1] = (inputSampleR * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sR2];
biquadB[biq_sR2] = (inputSampleR * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadC[biq_a0]) + biquadC[biq_sL1];
biquadC[biq_sL1] = (inputSampleL * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sL2];
biquadC[biq_sL2] = (inputSampleL * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadC[biq_a0]) + biquadC[biq_sR1];
biquadC[biq_sR1] = (inputSampleR * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sR2];
biquadC[biq_sR2] = (inputSampleR * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadD[biq_a0]) + biquadD[biq_sL1];
biquadD[biq_sL1] = (inputSampleL * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sL2];
biquadD[biq_sL2] = (inputSampleL * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadD[biq_a0]) + biquadD[biq_sR1];
biquadD[biq_sR1] = (inputSampleR * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sR2];
biquadD[biq_sR2] = (inputSampleR * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadE[biq_a0]) + biquadE[biq_sL1];
biquadE[biq_sL1] = (inputSampleL * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sL2];
biquadE[biq_sL2] = (inputSampleL * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadE[biq_a0]) + biquadE[biq_sR1];
biquadE[biq_sR1] = (inputSampleR * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sR2];
biquadE[biq_sR2] = (inputSampleR * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadF[biq_a0]) + biquadF[biq_sL1];
biquadF[biq_sL1] = (inputSampleL * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sL2];
biquadF[biq_sL2] = (inputSampleL * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadF[biq_a0]) + biquadF[biq_sR1];
biquadF[biq_sR1] = (inputSampleR * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sR2];
biquadF[biq_sR2] = (inputSampleR * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadG[biq_a0]) + biquadG[biq_sL1];
biquadG[biq_sL1] = (inputSampleL * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sL2];
biquadG[biq_sL2] = (inputSampleL * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadG[biq_a0]) + biquadG[biq_sR1];
biquadG[biq_sR1] = (inputSampleR * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sR2];
biquadG[biq_sR2] = (inputSampleR * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]);
inputSampleR = outSample;
if (bypass) {
inputSampleL = drySampleL;
inputSampleR = drySampleR;
} else {
inputSampleL = (inputSampleL * low) + ((drySampleL - inputSampleL)*high);
inputSampleR = (inputSampleR * low) + ((drySampleR - inputSampleR)*high);
}
//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 Isolator2::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
biquadA[biq_freq] = pow(A,(2.0*sqrt(overallscale)))*0.4999;
if (biquadA[biq_freq] < 0.0005) biquadA[biq_freq] = 0.0005;
biquadG[biq_freq] = biquadF[biq_freq] = biquadE[biq_freq] = biquadD[biq_freq] = biquadC[biq_freq] = biquadB[biq_freq] = biquadA[biq_freq];
double reso = pow(B,2);
double resoBoost = reso+1.0;
reso = 1.0-reso;
biquadA[biq_reso] = 4.46570214 * resoBoost;
biquadB[biq_reso] = 1.51387132 * resoBoost;
biquadC[biq_reso] = 0.93979296 * resoBoost;
biquadD[biq_reso] = 0.70710678 * resoBoost;
biquadE[biq_reso] = 0.59051105 * resoBoost;
biquadF[biq_reso] = 0.52972649 * resoBoost;
biquadG[biq_reso] = 0.50316379 * resoBoost;
biquadA[biq_aA0] = biquadA[biq_aB0];
biquadA[biq_aA1] = biquadA[biq_aB1];
biquadA[biq_aA2] = biquadA[biq_aB2];
biquadA[biq_bA1] = biquadA[biq_bB1];
biquadA[biq_bA2] = biquadA[biq_bB2];
biquadB[biq_aA0] = biquadB[biq_aB0];
biquadB[biq_aA1] = biquadB[biq_aB1];
biquadB[biq_aA2] = biquadB[biq_aB2];
biquadB[biq_bA1] = biquadB[biq_bB1];
biquadB[biq_bA2] = biquadB[biq_bB2];
biquadC[biq_aA0] = biquadC[biq_aB0];
biquadC[biq_aA1] = biquadC[biq_aB1];
biquadC[biq_aA2] = biquadC[biq_aB2];
biquadC[biq_bA1] = biquadC[biq_bB1];
biquadC[biq_bA2] = biquadC[biq_bB2];
biquadD[biq_aA0] = biquadD[biq_aB0];
biquadD[biq_aA1] = biquadD[biq_aB1];
biquadD[biq_aA2] = biquadD[biq_aB2];
biquadD[biq_bA1] = biquadD[biq_bB1];
biquadD[biq_bA2] = biquadD[biq_bB2];
biquadE[biq_aA0] = biquadE[biq_aB0];
biquadE[biq_aA1] = biquadE[biq_aB1];
biquadE[biq_aA2] = biquadE[biq_aB2];
biquadE[biq_bA1] = biquadE[biq_bB1];
biquadE[biq_bA2] = biquadE[biq_bB2];
biquadF[biq_aA0] = biquadF[biq_aB0];
biquadF[biq_aA1] = biquadF[biq_aB1];
biquadF[biq_aA2] = biquadF[biq_aB2];
biquadF[biq_bA1] = biquadF[biq_bB1];
biquadF[biq_bA2] = biquadF[biq_bB2];
biquadG[biq_aA0] = biquadG[biq_aB0];
biquadG[biq_aA1] = biquadG[biq_aB1];
biquadG[biq_aA2] = biquadG[biq_aB2];
biquadG[biq_bA1] = biquadG[biq_bB1];
biquadG[biq_bA2] = biquadG[biq_bB2];
//previous run through the buffer is still in the filter, so we move it
//to the A section and now it's the new starting point.
double K = tan(M_PI * biquadA[biq_freq]);
double norm = 1.0 / (1.0 + K / biquadA[biq_reso] + K * K);
biquadA[biq_aB0] = K * K * norm;
biquadA[biq_aB1] = 2.0 * biquadA[biq_aB0];
biquadA[biq_aB2] = biquadA[biq_aB0];
biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadA[biq_bB2] = (1.0 - K / biquadA[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadB[biq_freq]);
norm = 1.0 / (1.0 + K / biquadB[biq_reso] + K * K);
biquadB[biq_aB0] = K * K * norm;
biquadB[biq_aB1] = 2.0 * biquadB[biq_aB0];
biquadB[biq_aB2] = biquadB[biq_aB0];
biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadB[biq_bB2] = (1.0 - K / biquadB[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadC[biq_freq]);
norm = 1.0 / (1.0 + K / biquadC[biq_reso] + K * K);
biquadC[biq_aB0] = K * K * norm;
biquadC[biq_aB1] = 2.0 * biquadC[biq_aB0];
biquadC[biq_aB2] = biquadC[biq_aB0];
biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadC[biq_bB2] = (1.0 - K / biquadC[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadD[biq_freq]);
norm = 1.0 / (1.0 + K / biquadD[biq_reso] + K * K);
biquadD[biq_aB0] = K * K * norm;
biquadD[biq_aB1] = 2.0 * biquadD[biq_aB0];
biquadD[biq_aB2] = biquadD[biq_aB0];
biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadD[biq_bB2] = (1.0 - K / biquadD[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadE[biq_freq]);
norm = 1.0 / (1.0 + K / biquadE[biq_reso] + K * K);
biquadE[biq_aB0] = K * K * norm;
biquadE[biq_aB1] = 2.0 * biquadE[biq_aB0];
biquadE[biq_aB2] = biquadE[biq_aB0];
biquadE[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadE[biq_bB2] = (1.0 - K / biquadE[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadF[biq_freq]);
norm = 1.0 / (1.0 + K / biquadF[biq_reso] + K * K);
biquadF[biq_aB0] = K * K * norm;
biquadF[biq_aB1] = 2.0 * biquadF[biq_aB0];
biquadF[biq_aB2] = biquadF[biq_aB0];
biquadF[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadF[biq_bB2] = (1.0 - K / biquadF[biq_reso] + K * K) * norm;
K = tan(M_PI * biquadG[biq_freq]);
norm = 1.0 / (1.0 + K / biquadG[biq_reso] + K * K);
biquadG[biq_aB0] = K * K * norm;
biquadG[biq_aB1] = 2.0 * biquadG[biq_aB0];
biquadG[biq_aB2] = biquadG[biq_aB0];
biquadG[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadG[biq_bB2] = (1.0 - K / biquadG[biq_reso] + K * K) * norm;
bool bypass = (A == 1.0);
highA = highB;
highB = C*reso;
if (highB > 0.0) bypass = false;
lowA = lowB;
lowB = D*reso;
if (lowB < 1.0) bypass = false;
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;
double temp = (double)sampleFrames/inFramesToProcess;
biquadA[biq_a0] = (biquadA[biq_aA0]*temp)+(biquadA[biq_aB0]*(1.0-temp));
biquadA[biq_a1] = (biquadA[biq_aA1]*temp)+(biquadA[biq_aB1]*(1.0-temp));
biquadA[biq_a2] = (biquadA[biq_aA2]*temp)+(biquadA[biq_aB2]*(1.0-temp));
biquadA[biq_b1] = (biquadA[biq_bA1]*temp)+(biquadA[biq_bB1]*(1.0-temp));
biquadA[biq_b2] = (biquadA[biq_bA2]*temp)+(biquadA[biq_bB2]*(1.0-temp));
biquadB[biq_a0] = (biquadB[biq_aA0]*temp)+(biquadB[biq_aB0]*(1.0-temp));
biquadB[biq_a1] = (biquadB[biq_aA1]*temp)+(biquadB[biq_aB1]*(1.0-temp));
biquadB[biq_a2] = (biquadB[biq_aA2]*temp)+(biquadB[biq_aB2]*(1.0-temp));
biquadB[biq_b1] = (biquadB[biq_bA1]*temp)+(biquadB[biq_bB1]*(1.0-temp));
biquadB[biq_b2] = (biquadB[biq_bA2]*temp)+(biquadB[biq_bB2]*(1.0-temp));
biquadC[biq_a0] = (biquadC[biq_aA0]*temp)+(biquadC[biq_aB0]*(1.0-temp));
biquadC[biq_a1] = (biquadC[biq_aA1]*temp)+(biquadC[biq_aB1]*(1.0-temp));
biquadC[biq_a2] = (biquadC[biq_aA2]*temp)+(biquadC[biq_aB2]*(1.0-temp));
biquadC[biq_b1] = (biquadC[biq_bA1]*temp)+(biquadC[biq_bB1]*(1.0-temp));
biquadC[biq_b2] = (biquadC[biq_bA2]*temp)+(biquadC[biq_bB2]*(1.0-temp));
biquadD[biq_a0] = (biquadD[biq_aA0]*temp)+(biquadD[biq_aB0]*(1.0-temp));
biquadD[biq_a1] = (biquadD[biq_aA1]*temp)+(biquadD[biq_aB1]*(1.0-temp));
biquadD[biq_a2] = (biquadD[biq_aA2]*temp)+(biquadD[biq_aB2]*(1.0-temp));
biquadD[biq_b1] = (biquadD[biq_bA1]*temp)+(biquadD[biq_bB1]*(1.0-temp));
biquadD[biq_b2] = (biquadD[biq_bA2]*temp)+(biquadD[biq_bB2]*(1.0-temp));
biquadE[biq_a0] = (biquadE[biq_aA0]*temp)+(biquadE[biq_aB0]*(1.0-temp));
biquadE[biq_a1] = (biquadE[biq_aA1]*temp)+(biquadE[biq_aB1]*(1.0-temp));
biquadE[biq_a2] = (biquadE[biq_aA2]*temp)+(biquadE[biq_aB2]*(1.0-temp));
biquadE[biq_b1] = (biquadE[biq_bA1]*temp)+(biquadE[biq_bB1]*(1.0-temp));
biquadE[biq_b2] = (biquadE[biq_bA2]*temp)+(biquadE[biq_bB2]*(1.0-temp));
biquadF[biq_a0] = (biquadF[biq_aA0]*temp)+(biquadF[biq_aB0]*(1.0-temp));
biquadF[biq_a1] = (biquadF[biq_aA1]*temp)+(biquadF[biq_aB1]*(1.0-temp));
biquadF[biq_a2] = (biquadF[biq_aA2]*temp)+(biquadF[biq_aB2]*(1.0-temp));
biquadF[biq_b1] = (biquadF[biq_bA1]*temp)+(biquadF[biq_bB1]*(1.0-temp));
biquadF[biq_b2] = (biquadF[biq_bA2]*temp)+(biquadF[biq_bB2]*(1.0-temp));
biquadG[biq_a0] = (biquadG[biq_aA0]*temp)+(biquadG[biq_aB0]*(1.0-temp));
biquadG[biq_a1] = (biquadG[biq_aA1]*temp)+(biquadG[biq_aB1]*(1.0-temp));
biquadG[biq_a2] = (biquadG[biq_aA2]*temp)+(biquadG[biq_aB2]*(1.0-temp));
biquadG[biq_b1] = (biquadG[biq_bA1]*temp)+(biquadG[biq_bB1]*(1.0-temp));
biquadG[biq_b2] = (biquadG[biq_bA2]*temp)+(biquadG[biq_bB2]*(1.0-temp));
//this is the interpolation code for the biquad
double high = (highA*temp)+(highB*(1.0-temp));
double low = (lowA*temp)+(lowB*(1.0-temp));
double outSample = (inputSampleL * biquadA[biq_a0]) + biquadA[biq_sL1];
biquadA[biq_sL1] = (inputSampleL * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sL2];
biquadA[biq_sL2] = (inputSampleL * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadA[biq_a0]) + biquadA[biq_sR1];
biquadA[biq_sR1] = (inputSampleR * biquadA[biq_a1]) - (outSample * biquadA[biq_b1]) + biquadA[biq_sR2];
biquadA[biq_sR2] = (inputSampleR * biquadA[biq_a2]) - (outSample * biquadA[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadB[biq_a0]) + biquadB[biq_sL1];
biquadB[biq_sL1] = (inputSampleL * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sL2];
biquadB[biq_sL2] = (inputSampleL * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadB[biq_a0]) + biquadB[biq_sR1];
biquadB[biq_sR1] = (inputSampleR * biquadB[biq_a1]) - (outSample * biquadB[biq_b1]) + biquadB[biq_sR2];
biquadB[biq_sR2] = (inputSampleR * biquadB[biq_a2]) - (outSample * biquadB[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadC[biq_a0]) + biquadC[biq_sL1];
biquadC[biq_sL1] = (inputSampleL * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sL2];
biquadC[biq_sL2] = (inputSampleL * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadC[biq_a0]) + biquadC[biq_sR1];
biquadC[biq_sR1] = (inputSampleR * biquadC[biq_a1]) - (outSample * biquadC[biq_b1]) + biquadC[biq_sR2];
biquadC[biq_sR2] = (inputSampleR * biquadC[biq_a2]) - (outSample * biquadC[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadD[biq_a0]) + biquadD[biq_sL1];
biquadD[biq_sL1] = (inputSampleL * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sL2];
biquadD[biq_sL2] = (inputSampleL * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadD[biq_a0]) + biquadD[biq_sR1];
biquadD[biq_sR1] = (inputSampleR * biquadD[biq_a1]) - (outSample * biquadD[biq_b1]) + biquadD[biq_sR2];
biquadD[biq_sR2] = (inputSampleR * biquadD[biq_a2]) - (outSample * biquadD[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadE[biq_a0]) + biquadE[biq_sL1];
biquadE[biq_sL1] = (inputSampleL * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sL2];
biquadE[biq_sL2] = (inputSampleL * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadE[biq_a0]) + biquadE[biq_sR1];
biquadE[biq_sR1] = (inputSampleR * biquadE[biq_a1]) - (outSample * biquadE[biq_b1]) + biquadE[biq_sR2];
biquadE[biq_sR2] = (inputSampleR * biquadE[biq_a2]) - (outSample * biquadE[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadF[biq_a0]) + biquadF[biq_sL1];
biquadF[biq_sL1] = (inputSampleL * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sL2];
biquadF[biq_sL2] = (inputSampleL * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadF[biq_a0]) + biquadF[biq_sR1];
biquadF[biq_sR1] = (inputSampleR * biquadF[biq_a1]) - (outSample * biquadF[biq_b1]) + biquadF[biq_sR2];
biquadF[biq_sR2] = (inputSampleR * biquadF[biq_a2]) - (outSample * biquadF[biq_b2]);
inputSampleR = outSample;
outSample = (inputSampleL * biquadG[biq_a0]) + biquadG[biq_sL1];
biquadG[biq_sL1] = (inputSampleL * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sL2];
biquadG[biq_sL2] = (inputSampleL * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]);
inputSampleL = outSample;
outSample = (inputSampleR * biquadG[biq_a0]) + biquadG[biq_sR1];
biquadG[biq_sR1] = (inputSampleR * biquadG[biq_a1]) - (outSample * biquadG[biq_b1]) + biquadG[biq_sR2];
biquadG[biq_sR2] = (inputSampleR * biquadG[biq_a2]) - (outSample * biquadG[biq_b2]);
inputSampleR = outSample;
if (bypass) {
inputSampleL = drySampleL;
inputSampleR = drySampleR;
} else {
inputSampleL = (inputSampleL * low) + ((drySampleL - inputSampleL)*high);
inputSampleR = (inputSampleR * low) + ((drySampleR - inputSampleR)*high);
}
//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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