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airwindows/plugins/WinVST/ZLowpass2/ZLowpass2Proc.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/* ========================================
* ZLowpass2 - ZLowpass2.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __ZLowpass2_H
#include "ZLowpass2.h"
#endif
void ZLowpass2::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(B,3)*18930.0)/getSampleRate())+0.00162;
double clipFactor = 1.212-((1.0-B)*0.496);
biquadA[biq_reso] = 0.7071;
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];
//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;
//opamp stuff
inTrimA = inTrimB;
inTrimB = A*10.0;
inTrimB *= inTrimB; inTrimB *= inTrimB;
outTrimA = outTrimB;
outTrimB = C*10.0;
wetA = wetB;
wetB = pow(D,2);
double iirAmountA = 0.00069/overallscale;
fixA[fix_freq] = fixB[fix_freq] = 15500.0 / getSampleRate();
fixA[fix_reso] = fixB[fix_reso] = 0.935;
K = tan(M_PI * fixB[fix_freq]); //lowpass
norm = 1.0 / (1.0 + K / fixB[fix_reso] + K * K);
fixA[fix_a0] = fixB[fix_a0] = K * K * norm;
fixA[fix_a1] = fixB[fix_a1] = 2.0 * fixB[fix_a0];
fixA[fix_a2] = fixB[fix_a2] = fixB[fix_a0];
fixA[fix_b1] = fixB[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixA[fix_b2] = fixB[fix_b2] = (1.0 - K / fixB[fix_reso] + K * K) * norm;
//end opamp stuff
double trim = 0.1+(3.712*biquadA[biq_freq]);
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 overallDrySampleL = inputSampleL;
double overallDrySampleR = inputSampleR;
double outSample = (double)sampleFrames/inFramesToProcess;
biquadA[biq_a0] = (biquadA[biq_aA0]*outSample)+(biquadA[biq_aB0]*(1.0-outSample));
biquadA[biq_a1] = (biquadA[biq_aA1]*outSample)+(biquadA[biq_aB1]*(1.0-outSample));
biquadA[biq_a2] = (biquadA[biq_aA2]*outSample)+(biquadA[biq_aB2]*(1.0-outSample));
biquadA[biq_b1] = (biquadA[biq_bA1]*outSample)+(biquadA[biq_bB1]*(1.0-outSample));
biquadA[biq_b2] = (biquadA[biq_bA2]*outSample)+(biquadA[biq_bB2]*(1.0-outSample));
for (int x = 0; x < 7; x++) {biquadD[x] = biquadC[x] = biquadB[x] = biquadA[x];}
//this is the interpolation code for the biquad
double inTrim = (inTrimA*outSample)+(inTrimB*(1.0-outSample));
double outTrim = (outTrimA*outSample)+(outTrimB*(1.0-outSample));
double wet = (wetA*outSample)+(wetB*(1.0-outSample));
double aWet = 1.0;
double bWet = 1.0;
double cWet = 1.0;
double dWet = wet*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
if (inTrim != 1.0) {
inputSampleL *= inTrim;
inputSampleR *= inTrim;
}
if (inputSampleL > 1.0) inputSampleL = 1.0; if (inputSampleL < -1.0) inputSampleL = -1.0;
if (inputSampleR > 1.0) inputSampleR = 1.0; if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleL *= trim; inputSampleR *= trim;
inputSampleL /= clipFactor; inputSampleR /= clipFactor;
outSample = (inputSampleL * biquadA[biq_a0]) + biquadA[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = outSample;
outSample = (inputSampleR * biquadA[biq_a0]) + biquadA[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = outSample;
if (bWet > 0.0) {
inputSampleL /= clipFactor;
outSample = (inputSampleL * biquadB[biq_a0]) + biquadB[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = (outSample * bWet) + (drySampleL * (1.0-bWet));
inputSampleR /= clipFactor;
outSample = (inputSampleR * biquadB[biq_a0]) + biquadB[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = (outSample * bWet) + (drySampleR * (1.0-bWet));
}
if (cWet > 0.0) {
inputSampleL /= clipFactor;
outSample = (inputSampleL * biquadC[biq_a0]) + biquadC[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = (outSample * cWet) + (drySampleL * (1.0-cWet));
inputSampleR /= clipFactor;
outSample = (inputSampleR * biquadC[biq_a0]) + biquadC[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = (outSample * cWet) + (drySampleR * (1.0-cWet));
}
if (dWet > 0.0) {
inputSampleL /= clipFactor;
outSample = (inputSampleL * biquadD[biq_a0]) + biquadD[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = (outSample * dWet) + (drySampleL * (1.0-dWet));
inputSampleR /= clipFactor;
outSample = (inputSampleR * biquadD[biq_a0]) + biquadD[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = (outSample * dWet) + (drySampleR * (1.0-dWet));
}
inputSampleL /= clipFactor;
inputSampleR /= clipFactor;
//opamp stage
if (fabs(iirSampleAL)<1.18e-37) iirSampleAL = 0.0;
iirSampleAL = (iirSampleAL * (1.0 - iirAmountA)) + (inputSampleL * iirAmountA);
inputSampleL -= iirSampleAL;
if (fabs(iirSampleAR)<1.18e-37) iirSampleAR = 0.0;
iirSampleAR = (iirSampleAR * (1.0 - iirAmountA)) + (inputSampleR * iirAmountA);
inputSampleR -= iirSampleAR;
outSample = (inputSampleL * fixA[fix_a0]) + fixA[fix_sL1];
fixA[fix_sL1] = (inputSampleL * fixA[fix_a1]) - (outSample * fixA[fix_b1]) + fixA[fix_sL2];
fixA[fix_sL2] = (inputSampleL * fixA[fix_a2]) - (outSample * fixA[fix_b2]);
inputSampleL = outSample; //fixed biquad filtering ultrasonics
outSample = (inputSampleR * fixA[fix_a0]) + fixA[fix_sR1];
fixA[fix_sR1] = (inputSampleR * fixA[fix_a1]) - (outSample * fixA[fix_b1]) + fixA[fix_sR2];
fixA[fix_sR2] = (inputSampleR * fixA[fix_a2]) - (outSample * fixA[fix_b2]);
inputSampleR = outSample; //fixed biquad filtering ultrasonics
if (inputSampleL > 1.0) inputSampleL = 1.0; if (inputSampleL < -1.0) inputSampleL = -1.0;
inputSampleL -= (inputSampleL*inputSampleL*inputSampleL*inputSampleL*inputSampleL*0.1768);
if (inputSampleR > 1.0) inputSampleR = 1.0; if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleR -= (inputSampleR*inputSampleR*inputSampleR*inputSampleR*inputSampleR*0.1768);
outSample = (inputSampleL * fixB[fix_a0]) + fixB[fix_sL1];
fixB[fix_sL1] = (inputSampleL * fixB[fix_a1]) - (outSample * fixB[fix_b1]) + fixB[fix_sL2];
fixB[fix_sL2] = (inputSampleL * fixB[fix_a2]) - (outSample * fixB[fix_b2]);
inputSampleL = outSample; //fixed biquad filtering ultrasonics
outSample = (inputSampleR * fixB[fix_a0]) + fixB[fix_sR1];
fixB[fix_sR1] = (inputSampleR * fixB[fix_a1]) - (outSample * fixB[fix_b1]) + fixB[fix_sR2];
fixB[fix_sR2] = (inputSampleR * fixB[fix_a2]) - (outSample * fixB[fix_b2]);
inputSampleR = outSample; //fixed biquad filtering ultrasonics
if (outTrim != 1.0) {
inputSampleL *= outTrim;
inputSampleR *= outTrim;
}
//end opamp stage
if (aWet != 1.0) {
inputSampleL = (inputSampleL*aWet) + (overallDrySampleL*(1.0-aWet));
inputSampleR = (inputSampleR*aWet) + (overallDrySampleR*(1.0-aWet));
}
//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 ZLowpass2::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(B,3)*18930.0)/getSampleRate())+0.00162;
double clipFactor = 1.212-((1.0-B)*0.496);
biquadA[biq_reso] = 0.7071;
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];
//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;
//opamp stuff
inTrimA = inTrimB;
inTrimB = A*10.0;
inTrimB *= inTrimB; inTrimB *= inTrimB;
outTrimA = outTrimB;
outTrimB = C*10.0;
wetA = wetB;
wetB = pow(D,2);
double iirAmountA = 0.00069/overallscale;
fixA[fix_freq] = fixB[fix_freq] = 15500.0 / getSampleRate();
fixA[fix_reso] = fixB[fix_reso] = 0.935;
K = tan(M_PI * fixB[fix_freq]); //lowpass
norm = 1.0 / (1.0 + K / fixB[fix_reso] + K * K);
fixA[fix_a0] = fixB[fix_a0] = K * K * norm;
fixA[fix_a1] = fixB[fix_a1] = 2.0 * fixB[fix_a0];
fixA[fix_a2] = fixB[fix_a2] = fixB[fix_a0];
fixA[fix_b1] = fixB[fix_b1] = 2.0 * (K * K - 1.0) * norm;
fixA[fix_b2] = fixB[fix_b2] = (1.0 - K / fixB[fix_reso] + K * K) * norm;
//end opamp stuff
double trim = 0.1+(3.712*biquadA[biq_freq]);
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 overallDrySampleL = inputSampleL;
double overallDrySampleR = inputSampleR;
double outSample = (double)sampleFrames/inFramesToProcess;
biquadA[biq_a0] = (biquadA[biq_aA0]*outSample)+(biquadA[biq_aB0]*(1.0-outSample));
biquadA[biq_a1] = (biquadA[biq_aA1]*outSample)+(biquadA[biq_aB1]*(1.0-outSample));
biquadA[biq_a2] = (biquadA[biq_aA2]*outSample)+(biquadA[biq_aB2]*(1.0-outSample));
biquadA[biq_b1] = (biquadA[biq_bA1]*outSample)+(biquadA[biq_bB1]*(1.0-outSample));
biquadA[biq_b2] = (biquadA[biq_bA2]*outSample)+(biquadA[biq_bB2]*(1.0-outSample));
for (int x = 0; x < 7; x++) {biquadD[x] = biquadC[x] = biquadB[x] = biquadA[x];}
//this is the interpolation code for the biquad
double inTrim = (inTrimA*outSample)+(inTrimB*(1.0-outSample));
double outTrim = (outTrimA*outSample)+(outTrimB*(1.0-outSample));
double wet = (wetA*outSample)+(wetB*(1.0-outSample));
double aWet = 1.0;
double bWet = 1.0;
double cWet = 1.0;
double dWet = wet*4.0;
//four-stage wet/dry control using progressive stages that bypass when not engaged
if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;}
else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;}
else {dWet -= 3.0;}
//this is one way to make a little set of dry/wet stages that are successively added to the
//output as the control is turned up. Each one independently goes from 0-1 and stays at 1
//beyond that point: this is a way to progressively add a 'black box' sound processing
//which lets you fall through to simpler processing at lower settings.
if (inTrim != 1.0) {
inputSampleL *= inTrim;
inputSampleR *= inTrim;
}
if (inputSampleL > 1.0) inputSampleL = 1.0; if (inputSampleL < -1.0) inputSampleL = -1.0;
if (inputSampleR > 1.0) inputSampleR = 1.0; if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleL *= trim; inputSampleR *= trim;
inputSampleL /= clipFactor; inputSampleR /= clipFactor;
outSample = (inputSampleL * biquadA[biq_a0]) + biquadA[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = outSample;
outSample = (inputSampleR * biquadA[biq_a0]) + biquadA[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = outSample;
if (bWet > 0.0) {
inputSampleL /= clipFactor;
outSample = (inputSampleL * biquadB[biq_a0]) + biquadB[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = (outSample * bWet) + (drySampleL * (1.0-bWet));
inputSampleR /= clipFactor;
outSample = (inputSampleR * biquadB[biq_a0]) + biquadB[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = (outSample * bWet) + (drySampleR * (1.0-bWet));
}
if (cWet > 0.0) {
inputSampleL /= clipFactor;
outSample = (inputSampleL * biquadC[biq_a0]) + biquadC[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = (outSample * cWet) + (drySampleL * (1.0-cWet));
inputSampleR /= clipFactor;
outSample = (inputSampleR * biquadC[biq_a0]) + biquadC[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = (outSample * cWet) + (drySampleR * (1.0-cWet));
}
if (dWet > 0.0) {
inputSampleL /= clipFactor;
outSample = (inputSampleL * biquadD[biq_a0]) + biquadD[biq_sL1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleL = inputSampleL = (outSample * dWet) + (drySampleL * (1.0-dWet));
inputSampleR /= clipFactor;
outSample = (inputSampleR * biquadD[biq_a0]) + biquadD[biq_sR1];
if (outSample > 1.0) outSample = 1.0; if (outSample < -1.0) outSample = -1.0;
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]);
drySampleR = inputSampleR = (outSample * dWet) + (drySampleR * (1.0-dWet));
}
inputSampleL /= clipFactor;
inputSampleR /= clipFactor;
//opamp stage
if (fabs(iirSampleAL)<1.18e-37) iirSampleAL = 0.0;
iirSampleAL = (iirSampleAL * (1.0 - iirAmountA)) + (inputSampleL * iirAmountA);
inputSampleL -= iirSampleAL;
if (fabs(iirSampleAR)<1.18e-37) iirSampleAR = 0.0;
iirSampleAR = (iirSampleAR * (1.0 - iirAmountA)) + (inputSampleR * iirAmountA);
inputSampleR -= iirSampleAR;
outSample = (inputSampleL * fixA[fix_a0]) + fixA[fix_sL1];
fixA[fix_sL1] = (inputSampleL * fixA[fix_a1]) - (outSample * fixA[fix_b1]) + fixA[fix_sL2];
fixA[fix_sL2] = (inputSampleL * fixA[fix_a2]) - (outSample * fixA[fix_b2]);
inputSampleL = outSample; //fixed biquad filtering ultrasonics
outSample = (inputSampleR * fixA[fix_a0]) + fixA[fix_sR1];
fixA[fix_sR1] = (inputSampleR * fixA[fix_a1]) - (outSample * fixA[fix_b1]) + fixA[fix_sR2];
fixA[fix_sR2] = (inputSampleR * fixA[fix_a2]) - (outSample * fixA[fix_b2]);
inputSampleR = outSample; //fixed biquad filtering ultrasonics
if (inputSampleL > 1.0) inputSampleL = 1.0; if (inputSampleL < -1.0) inputSampleL = -1.0;
inputSampleL -= (inputSampleL*inputSampleL*inputSampleL*inputSampleL*inputSampleL*0.1768);
if (inputSampleR > 1.0) inputSampleR = 1.0; if (inputSampleR < -1.0) inputSampleR = -1.0;
inputSampleR -= (inputSampleR*inputSampleR*inputSampleR*inputSampleR*inputSampleR*0.1768);
outSample = (inputSampleL * fixB[fix_a0]) + fixB[fix_sL1];
fixB[fix_sL1] = (inputSampleL * fixB[fix_a1]) - (outSample * fixB[fix_b1]) + fixB[fix_sL2];
fixB[fix_sL2] = (inputSampleL * fixB[fix_a2]) - (outSample * fixB[fix_b2]);
inputSampleL = outSample; //fixed biquad filtering ultrasonics
outSample = (inputSampleR * fixB[fix_a0]) + fixB[fix_sR1];
fixB[fix_sR1] = (inputSampleR * fixB[fix_a1]) - (outSample * fixB[fix_b1]) + fixB[fix_sR2];
fixB[fix_sR2] = (inputSampleR * fixB[fix_a2]) - (outSample * fixB[fix_b2]);
inputSampleR = outSample; //fixed biquad filtering ultrasonics
if (outTrim != 1.0) {
inputSampleL *= outTrim;
inputSampleR *= outTrim;
}
//end opamp stage
if (aWet != 1.0) {
inputSampleL = (inputSampleL*aWet) + (overallDrySampleL*(1.0-aWet));
inputSampleR = (inputSampleR*aWet) + (overallDrySampleR*(1.0-aWet));
}
//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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