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airwindows/plugins/MacVST/ZRegion2/source/ZRegion2Proc.cpp
Christopher Johnson f06250c082 Clarifying Licensing in boilerplate code generation
2022-11-21 09:20:21 -05:00

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/* ========================================
* ZRegion2 - ZRegion2.h
* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __ZRegion2_H
#include "ZRegion2.h"
#endif
void ZRegion2::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();
//begin from XRegion
double high = B;
double low = C;
double mid = (high+low)*0.5;
double spread = 1.001-fabs(high-low);
biquad[biq_freq] = (pow(high,3)*20000.0)/getSampleRate();
if (biquad[biq_freq] < 0.00009) biquad[biq_freq] = 0.00009;
double compensation = sqrt(biquad[biq_freq])*6.4*spread;
double clipFactor = 0.75+(biquad[biq_freq]*D*37.0);
biquadA[biq_freq] = (pow((high+mid)*0.5,3)*20000.0)/getSampleRate();
if (biquadA[biq_freq] < 0.00009) biquadA[biq_freq] = 0.00009;
double compensationA = sqrt(biquadA[biq_freq])*6.4*spread;
double clipFactorA = 0.75+(biquadA[biq_freq]*D*37.0);
biquadB[biq_freq] = (pow(mid,3)*20000.0)/getSampleRate();
if (biquadB[biq_freq] < 0.00009) biquadB[biq_freq] = 0.00009;
double compensationB = sqrt(biquadB[biq_freq])*6.4*spread;
double clipFactorB = 0.75+(biquadB[biq_freq]*D*37.0);
biquadC[biq_freq] = (pow((mid+low)*0.5,3)*20000.0)/getSampleRate();
if (biquadC[biq_freq] < 0.00009) biquadC[biq_freq] = 0.00009;
double compensationC = sqrt(biquadC[biq_freq])*6.4*spread;
double clipFactorC = 0.75+(biquadC[biq_freq]*D*37.0);
biquadD[biq_freq] = (pow(low,3)*20000.0)/getSampleRate();
if (biquadD[biq_freq] < 0.00009) biquadD[biq_freq] = 0.00009;
double compensationD = sqrt(biquadD[biq_freq])*6.4*spread;
double clipFactorD = 0.75+(biquadD[biq_freq]*D*37.0);
//set up all the interpolations
biquad[biq_aA0] = biquad[biq_aB0];
biquad[biq_aA1] = biquad[biq_aB1];
biquad[biq_aA2] = biquad[biq_aB2];
biquad[biq_bA1] = biquad[biq_bB1];
biquad[biq_bA2] = biquad[biq_bB2];
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];
//since this is Region, they are all different
double K = tan(M_PI * biquad[biq_freq]);
double norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquad[biq_aB0] = K / 0.7071 * norm;
biquad[biq_aB2] = -biquad[biq_aB0];
biquad[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquad[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadA[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadA[biq_aB0] = K / 0.7071 * norm;
biquadA[biq_aB2] = -biquadA[biq_aB0];
biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadA[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadB[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadB[biq_aB0] = K / 0.7071 * norm;
biquadB[biq_aB2] = -biquadB[biq_aB0];
biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadB[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadC[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadC[biq_aB0] = K / 0.7071 * norm;
biquadC[biq_aB2] = -biquadC[biq_aB0];
biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadC[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadD[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadD[biq_aB0] = K / 0.7071 * norm;
biquadD[biq_aB2] = -biquadD[biq_aB0];
biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadD[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
//opamp stuff
inTrimA = inTrimB;
inTrimB = A*10.0;
inTrimB *= inTrimB; inTrimB *= inTrimB;
wetA = wetB;
wetB = D;
overallWetA = overallWetB;
overallWetB = E;
double iirAmountA = 0.00069/overallscale;
fixB[fix_freq] = fixA[fix_freq] = 15500.0 / getSampleRate();
fixB[fix_reso] = fixA[fix_reso] = 0.935;
K = tan(M_PI * fixA[fix_freq]); //lowpass
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 (int x = 0; x < 7; x++) fixB[x] = fixA[x];
//end opamp stuff
double outSample = 0.0;
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 overallDrySampleL = inputSampleL;
double overallDrySampleR = inputSampleR;
double nukeLevelL = inputSampleL;
double nukeLevelR = inputSampleR;
double temp = (double)sampleFrames/inFramesToProcess;
biquad[biq_a0] = (biquad[biq_aA0]*temp)+(biquad[biq_aB0]*(1.0-temp));
biquad[biq_a1] = (biquad[biq_aA1]*temp)+(biquad[biq_aB1]*(1.0-temp));
biquad[biq_a2] = (biquad[biq_aA2]*temp)+(biquad[biq_aB2]*(1.0-temp));
biquad[biq_b1] = (biquad[biq_bA1]*temp)+(biquad[biq_bB1]*(1.0-temp));
biquad[biq_b2] = (biquad[biq_bA2]*temp)+(biquad[biq_bB2]*(1.0-temp));
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));
//this is the interpolation code for all the biquads
double inTrim = (inTrimA*temp)+(inTrimB*(1.0-temp));
double wet = (wetA*temp)+(wetB*(1.0-temp));
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.
double overallWet = (overallWetA*temp)+(overallWetB*(1.0-temp));
if (inTrim != 1.0) {inputSampleL *= inTrim; inputSampleR *= inTrim;}
//begin XRegion
inputSampleL *= clipFactor;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
outSample = (inputSampleL * biquad[biq_a0]) + biquad[biq_sL1];
biquad[biq_sL1] = (inputSampleL * biquad[biq_a1]) - (outSample * biquad[biq_b1]) + biquad[biq_sL2];
biquad[biq_sL2] = (inputSampleL * biquad[biq_a2]) - (outSample * biquad[biq_b2]);
inputSampleL = outSample / compensation; nukeLevelL = inputSampleL;
inputSampleR *= clipFactor;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
outSample = (inputSampleR * biquad[biq_a0]) + biquad[biq_sR1];
biquad[biq_sR1] = (inputSampleR * biquad[biq_a1]) - (outSample * biquad[biq_b1]) + biquad[biq_sR2];
biquad[biq_sR2] = (inputSampleR * biquad[biq_a2]) - (outSample * biquad[biq_b2]);
inputSampleR = outSample / compensation; nukeLevelR = inputSampleR;
if (aWet > 0.0) {
inputSampleL *= clipFactorA;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationA; inputSampleL = (inputSampleL * aWet) + (nukeLevelL * (1.0-aWet));
nukeLevelL = inputSampleL;
inputSampleR *= clipFactorA;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationA; inputSampleR = (inputSampleR * aWet) + (nukeLevelR * (1.0-aWet));
nukeLevelR = inputSampleR;
}
if (bWet > 0.0) {
inputSampleL *= clipFactorB;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationB; inputSampleL = (inputSampleL * bWet) + (nukeLevelL * (1.0-bWet));
nukeLevelL = inputSampleL;
inputSampleR *= clipFactorB;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationB; inputSampleR = (inputSampleR * bWet) + (nukeLevelR * (1.0-bWet));
nukeLevelR = inputSampleR;
}
if (cWet > 0.0) {
inputSampleL *= clipFactorC;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationC; inputSampleL = (inputSampleL * cWet) + (nukeLevelL * (1.0-cWet));
nukeLevelL = inputSampleL;
inputSampleR *= clipFactorC;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationC; inputSampleR = (inputSampleR * cWet) + (nukeLevelR * (1.0-cWet));
nukeLevelR = inputSampleR;
}
if (dWet > 0.0) {
inputSampleL *= clipFactorD;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationD; inputSampleL = (inputSampleL * dWet) + (nukeLevelL * (1.0-dWet));
inputSampleR *= clipFactorD;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationD; inputSampleR = (inputSampleR * dWet) + (nukeLevelR * (1.0-dWet));
}
//end XRegion
//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
//end opamp stage
if (overallWet !=1.0) {
inputSampleL = (inputSampleL * overallWet) + (overallDrySampleL * (1.0-overallWet));
inputSampleR = (inputSampleR * overallWet) + (overallDrySampleR * (1.0-overallWet));
}
//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 ZRegion2::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();
//begin from XRegion
double high = B;
double low = C;
double mid = (high+low)*0.5;
double spread = 1.001-fabs(high-low);
biquad[biq_freq] = (pow(high,3)*20000.0)/getSampleRate();
if (biquad[biq_freq] < 0.00009) biquad[biq_freq] = 0.00009;
double compensation = sqrt(biquad[biq_freq])*6.4*spread;
double clipFactor = 0.75+(biquad[biq_freq]*D*37.0);
biquadA[biq_freq] = (pow((high+mid)*0.5,3)*20000.0)/getSampleRate();
if (biquadA[biq_freq] < 0.00009) biquadA[biq_freq] = 0.00009;
double compensationA = sqrt(biquadA[biq_freq])*6.4*spread;
double clipFactorA = 0.75+(biquadA[biq_freq]*D*37.0);
biquadB[biq_freq] = (pow(mid,3)*20000.0)/getSampleRate();
if (biquadB[biq_freq] < 0.00009) biquadB[biq_freq] = 0.00009;
double compensationB = sqrt(biquadB[biq_freq])*6.4*spread;
double clipFactorB = 0.75+(biquadB[biq_freq]*D*37.0);
biquadC[biq_freq] = (pow((mid+low)*0.5,3)*20000.0)/getSampleRate();
if (biquadC[biq_freq] < 0.00009) biquadC[biq_freq] = 0.00009;
double compensationC = sqrt(biquadC[biq_freq])*6.4*spread;
double clipFactorC = 0.75+(biquadC[biq_freq]*D*37.0);
biquadD[biq_freq] = (pow(low,3)*20000.0)/getSampleRate();
if (biquadD[biq_freq] < 0.00009) biquadD[biq_freq] = 0.00009;
double compensationD = sqrt(biquadD[biq_freq])*6.4*spread;
double clipFactorD = 0.75+(biquadD[biq_freq]*D*37.0);
//set up all the interpolations
biquad[biq_aA0] = biquad[biq_aB0];
biquad[biq_aA1] = biquad[biq_aB1];
biquad[biq_aA2] = biquad[biq_aB2];
biquad[biq_bA1] = biquad[biq_bB1];
biquad[biq_bA2] = biquad[biq_bB2];
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];
//since this is Region, they are all different
double K = tan(M_PI * biquad[biq_freq]);
double norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquad[biq_aB0] = K / 0.7071 * norm;
biquad[biq_aB2] = -biquad[biq_aB0];
biquad[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquad[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadA[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadA[biq_aB0] = K / 0.7071 * norm;
biquadA[biq_aB2] = -biquadA[biq_aB0];
biquadA[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadA[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadB[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadB[biq_aB0] = K / 0.7071 * norm;
biquadB[biq_aB2] = -biquadB[biq_aB0];
biquadB[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadB[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadC[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadC[biq_aB0] = K / 0.7071 * norm;
biquadC[biq_aB2] = -biquadC[biq_aB0];
biquadC[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadC[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
K = tan(M_PI * biquadD[biq_freq]);
norm = 1.0 / (1.0 + K / 0.7071 + K * K);
biquadD[biq_aB0] = K / 0.7071 * norm;
biquadD[biq_aB2] = -biquadD[biq_aB0];
biquadD[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
biquadD[biq_bB2] = (1.0 - K / 0.7071 + K * K) * norm;
//opamp stuff
inTrimA = inTrimB;
inTrimB = A*10.0;
inTrimB *= inTrimB; inTrimB *= inTrimB;
wetA = wetB;
wetB = D;
overallWetA = overallWetB;
overallWetB = E;
double iirAmountA = 0.00069/overallscale;
fixB[fix_freq] = fixA[fix_freq] = 15500.0 / getSampleRate();
fixB[fix_reso] = fixA[fix_reso] = 0.935;
K = tan(M_PI * fixA[fix_freq]); //lowpass
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 (int x = 0; x < 7; x++) fixB[x] = fixA[x];
//end opamp stuff
double outSample = 0.0;
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 overallDrySampleL = inputSampleL;
double overallDrySampleR = inputSampleR;
double nukeLevelL = inputSampleL;
double nukeLevelR = inputSampleR;
double temp = (double)sampleFrames/inFramesToProcess;
biquad[biq_a0] = (biquad[biq_aA0]*temp)+(biquad[biq_aB0]*(1.0-temp));
biquad[biq_a1] = (biquad[biq_aA1]*temp)+(biquad[biq_aB1]*(1.0-temp));
biquad[biq_a2] = (biquad[biq_aA2]*temp)+(biquad[biq_aB2]*(1.0-temp));
biquad[biq_b1] = (biquad[biq_bA1]*temp)+(biquad[biq_bB1]*(1.0-temp));
biquad[biq_b2] = (biquad[biq_bA2]*temp)+(biquad[biq_bB2]*(1.0-temp));
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));
//this is the interpolation code for all the biquads
double inTrim = (inTrimA*temp)+(inTrimB*(1.0-temp));
double wet = (wetA*temp)+(wetB*(1.0-temp));
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.
double overallWet = (overallWetA*temp)+(overallWetB*(1.0-temp));
if (inTrim != 1.0) {inputSampleL *= inTrim; inputSampleR *= inTrim;}
//begin XRegion
inputSampleL *= clipFactor;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
outSample = (inputSampleL * biquad[biq_a0]) + biquad[biq_sL1];
biquad[biq_sL1] = (inputSampleL * biquad[biq_a1]) - (outSample * biquad[biq_b1]) + biquad[biq_sL2];
biquad[biq_sL2] = (inputSampleL * biquad[biq_a2]) - (outSample * biquad[biq_b2]);
inputSampleL = outSample / compensation; nukeLevelL = inputSampleL;
inputSampleR *= clipFactor;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
outSample = (inputSampleR * biquad[biq_a0]) + biquad[biq_sR1];
biquad[biq_sR1] = (inputSampleR * biquad[biq_a1]) - (outSample * biquad[biq_b1]) + biquad[biq_sR2];
biquad[biq_sR2] = (inputSampleR * biquad[biq_a2]) - (outSample * biquad[biq_b2]);
inputSampleR = outSample / compensation; nukeLevelR = inputSampleR;
if (aWet > 0.0) {
inputSampleL *= clipFactorA;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationA; inputSampleL = (inputSampleL * aWet) + (nukeLevelL * (1.0-aWet));
nukeLevelL = inputSampleL;
inputSampleR *= clipFactorA;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationA; inputSampleR = (inputSampleR * aWet) + (nukeLevelR * (1.0-aWet));
nukeLevelR = inputSampleR;
}
if (bWet > 0.0) {
inputSampleL *= clipFactorB;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationB; inputSampleL = (inputSampleL * bWet) + (nukeLevelL * (1.0-bWet));
nukeLevelL = inputSampleL;
inputSampleR *= clipFactorB;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationB; inputSampleR = (inputSampleR * bWet) + (nukeLevelR * (1.0-bWet));
nukeLevelR = inputSampleR;
}
if (cWet > 0.0) {
inputSampleL *= clipFactorC;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationC; inputSampleL = (inputSampleL * cWet) + (nukeLevelL * (1.0-cWet));
nukeLevelL = inputSampleL;
inputSampleR *= clipFactorC;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationC; inputSampleR = (inputSampleR * cWet) + (nukeLevelR * (1.0-cWet));
nukeLevelR = inputSampleR;
}
if (dWet > 0.0) {
inputSampleL *= clipFactorD;
if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
inputSampleL = sin(inputSampleL);
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 / compensationD; inputSampleL = (inputSampleL * dWet) + (nukeLevelL * (1.0-dWet));
inputSampleR *= clipFactorD;
if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
inputSampleR = sin(inputSampleR);
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 / compensationD; inputSampleR = (inputSampleR * dWet) + (nukeLevelR * (1.0-dWet));
}
//end XRegion
//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
//end opamp stage
if (overallWet !=1.0) {
inputSampleL = (inputSampleL * overallWet) + (overallDrySampleL * (1.0-overallWet));
inputSampleR = (inputSampleR * overallWet) + (overallDrySampleR * (1.0-overallWet));
}
//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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