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262 lines
7.7 KiB
C++
Executable file
262 lines
7.7 KiB
C++
Executable file
/* ========================================
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* Hull2 - Hull2.h
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* Copyright (c) airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Hull2_H
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#include "Hull2.h"
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#endif
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void Hull2::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
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{
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float* in1 = inputs[0];
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float* in2 = inputs[1];
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float* out1 = outputs[0];
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float* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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int cycleEnd = floor(overallscale);
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if (cycleEnd < 1) cycleEnd = 1;
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if (cycleEnd > 4) cycleEnd = 4;
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//max out at 4x, 192k
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double treble = A*2.0;
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double mid = B*2.0;
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double bass = C*2.0;
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double iirAmount = 0.125/cycleEnd;
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int limit = 4*cycleEnd;
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double divisor = 2.0/limit;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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//begin Hull2 treble crossover
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hullp--; if (hullp < 0) hullp += 60;
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hullL[hullp] = hullL[hullp+60] = inputSampleL;
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hullR[hullp] = hullR[hullp+60] = inputSampleR;
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int x = hullp;
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double midSampleL = 0.0;
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double midSampleR = 0.0;
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while (x < hullp+(limit/2)) {
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midSampleL += hullL[x] * divisor;
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midSampleR += hullR[x] * divisor;
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x++;
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}
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midSampleL += midSampleL * 0.125;
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midSampleR += midSampleR * 0.125;
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while (x < hullp+limit) {
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midSampleL -= hullL[x] * 0.125 * divisor;
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midSampleR -= hullR[x] * 0.125 * divisor;
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x++;
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}
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hullL[hullp+20] = hullL[hullp+80] = midSampleL;
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hullR[hullp+20] = hullR[hullp+80] = midSampleR;
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x = hullp+20;
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midSampleL = midSampleR = 0.0;
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while (x < hullp+20+(limit/2)) {
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midSampleL += hullL[x] * divisor;
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midSampleR += hullR[x] * divisor;
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x++;
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}
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midSampleL += midSampleL * 0.125;
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midSampleR += midSampleR * 0.125;
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while (x < hullp+20+limit) {
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midSampleL -= hullL[x] * 0.125 * divisor;
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midSampleR -= hullR[x] * 0.125 * divisor;
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x++;
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}
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hullL[hullp+40] = hullL[hullp+100] = midSampleL;
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hullR[hullp+40] = hullR[hullp+100] = midSampleR;
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x = hullp+40;
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midSampleL = midSampleR = 0.0;
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while (x < hullp+40+(limit/2)) {
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midSampleL += hullL[x] * divisor;
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midSampleR += hullR[x] * divisor;
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x++;
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}
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midSampleL += midSampleL * 0.125;
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midSampleR += midSampleR * 0.125;
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while (x < hullp+40+limit) {
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midSampleL -= hullL[x] * 0.125 * divisor;
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midSampleR -= hullR[x] * 0.125 * divisor;
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x++;
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}
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double trebleSampleL = drySampleL - midSampleL;
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double trebleSampleR = drySampleR - midSampleR;
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//end Hull2 treble crossover
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//begin Hull2 midbass crossover
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double bassSampleL = midSampleL;
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double bassSampleR = midSampleR;
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x = 0;
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while (x < 3) {
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hullbL[x] = (hullbL[x] * (1.0 - iirAmount)) + (bassSampleL * iirAmount);
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hullbR[x] = (hullbR[x] * (1.0 - iirAmount)) + (bassSampleR * iirAmount);
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if (fabs(hullbL[x])<1.18e-37) hullbL[x] = 0.0;
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if (fabs(hullbR[x])<1.18e-37) hullbR[x] = 0.0;
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bassSampleL = hullbL[x];
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bassSampleR = hullbR[x];
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x++;
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}
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midSampleL -= bassSampleL;
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midSampleR -= bassSampleR;
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//end Hull2 midbass crossover
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inputSampleL = (bassSampleL * bass) + (midSampleL * mid) + (trebleSampleL * treble);
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inputSampleR = (bassSampleR * bass) + (midSampleR * mid) + (trebleSampleR * treble);
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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void Hull2::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
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{
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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int cycleEnd = floor(overallscale);
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if (cycleEnd < 1) cycleEnd = 1;
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if (cycleEnd > 4) cycleEnd = 4;
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//max out at 4x, 192k
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double treble = A*2.0;
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double mid = B*2.0;
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double bass = C*2.0;
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double iirAmount = 0.125/cycleEnd;
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int limit = 4*cycleEnd;
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double divisor = 2.0/limit;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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//begin Hull2 treble crossover
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hullp--; if (hullp < 0) hullp += 60;
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hullL[hullp] = hullL[hullp+60] = inputSampleL;
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hullR[hullp] = hullR[hullp+60] = inputSampleR;
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int x = hullp;
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double midSampleL = 0.0;
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double midSampleR = 0.0;
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while (x < hullp+(limit/2)) {
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midSampleL += hullL[x] * divisor;
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midSampleR += hullR[x] * divisor;
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x++;
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}
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midSampleL += midSampleL * 0.125;
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midSampleR += midSampleR * 0.125;
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while (x < hullp+limit) {
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midSampleL -= hullL[x] * 0.125 * divisor;
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midSampleR -= hullR[x] * 0.125 * divisor;
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x++;
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}
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hullL[hullp+20] = hullL[hullp+80] = midSampleL;
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hullR[hullp+20] = hullR[hullp+80] = midSampleR;
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x = hullp+20;
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midSampleL = midSampleR = 0.0;
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while (x < hullp+20+(limit/2)) {
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midSampleL += hullL[x] * divisor;
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midSampleR += hullR[x] * divisor;
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x++;
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}
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midSampleL += midSampleL * 0.125;
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midSampleR += midSampleR * 0.125;
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while (x < hullp+20+limit) {
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midSampleL -= hullL[x] * 0.125 * divisor;
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midSampleR -= hullR[x] * 0.125 * divisor;
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x++;
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}
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hullL[hullp+40] = hullL[hullp+100] = midSampleL;
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hullR[hullp+40] = hullR[hullp+100] = midSampleR;
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x = hullp+40;
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midSampleL = midSampleR = 0.0;
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while (x < hullp+40+(limit/2)) {
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midSampleL += hullL[x] * divisor;
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midSampleR += hullR[x] * divisor;
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x++;
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}
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midSampleL += midSampleL * 0.125;
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midSampleR += midSampleR * 0.125;
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while (x < hullp+40+limit) {
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midSampleL -= hullL[x] * 0.125 * divisor;
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midSampleR -= hullR[x] * 0.125 * divisor;
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x++;
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}
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double trebleSampleL = drySampleL - midSampleL;
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double trebleSampleR = drySampleR - midSampleR;
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//end Hull2 treble crossover
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//begin Hull2 midbass crossover
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double bassSampleL = midSampleL;
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double bassSampleR = midSampleR;
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x = 0;
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while (x < 3) {
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hullbL[x] = (hullbL[x] * (1.0 - iirAmount)) + (bassSampleL * iirAmount);
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hullbR[x] = (hullbR[x] * (1.0 - iirAmount)) + (bassSampleR * iirAmount);
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if (fabs(hullbL[x])<1.18e-37) hullbL[x] = 0.0;
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if (fabs(hullbR[x])<1.18e-37) hullbR[x] = 0.0;
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bassSampleL = hullbL[x];
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bassSampleR = hullbR[x];
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x++;
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}
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midSampleL -= bassSampleL;
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midSampleR -= bassSampleR;
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//end Hull2 midbass crossover
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inputSampleL = (bassSampleL * bass) + (midSampleL * mid) + (trebleSampleL * treble);
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inputSampleR = (bassSampleR * bass) + (midSampleR * mid) + (trebleSampleR * treble);
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//begin 64 bit stereo floating point dither
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//int expon; frexp((double)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//frexp((double)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//end 64 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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