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206 lines
8.5 KiB
C++
Executable file
206 lines
8.5 KiB
C++
Executable file
/* ========================================
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* Coils2 - Coils2.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Coils2_H
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#include "Coils2.h"
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#endif
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void Coils2::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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double distScaling = pow(1.0-A,2);
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if (distScaling < 0.0001) distScaling = 0.0001;
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biquadA[0] = 600.0/getSampleRate();
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biquadA[1] = 0.01+(pow(B,2)*0.5);
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double iirAmount = biquadA[1]/overallscale;
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double K = tan(M_PI * biquadA[0]);
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double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
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biquadA[2] = K / biquadA[1] * norm;
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biquadA[4] = -biquadA[2];
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biquadA[5] = 2.0 * (K * K - 1.0) * norm;
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biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm;
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biquadB[0] = (21890.0-(biquadA[1]*890.0))/getSampleRate();
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biquadB[1] = 0.89;
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K = tan(M_PI * biquadB[0]);
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norm = 1.0 / (1.0 + K / biquadB[1] + K * K);
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biquadB[2] = K * K * norm;
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biquadB[3] = 2.0 * biquadB[2];
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biquadB[4] = biquadB[2];
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biquadB[5] = 2.0 * (K * K - 1.0) * norm;
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biquadB[6] = (1.0 - K / biquadB[1] + K * K) * norm;
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double wet = C;
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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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if (biquadA[0] < 0.49999) {
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double tempSample = (inputSampleL * biquadA[2]) + biquadA[7];
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biquadA[7] = -(tempSample * biquadA[5]) + biquadA[8];
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biquadA[8] = (inputSampleL * biquadA[4]) - (tempSample * biquadA[6]);
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inputSampleL = tempSample;
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tempSample = (inputSampleR * biquadA[2]) + biquadA[9];
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biquadA[9] = -(tempSample * biquadA[5]) + biquadA[10];
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biquadA[10] = (inputSampleR * biquadA[4]) - (tempSample * biquadA[6]);
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inputSampleR = tempSample; //create bandpass of clean tone
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}
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double diffSampleL = (drySampleL-inputSampleL)/distScaling;
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double diffSampleR = (drySampleR-inputSampleR)/distScaling; //mids notched out
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if (biquadB[0] < 0.49999) {
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double tempSample = (diffSampleL * biquadB[2]) + biquadB[7];
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biquadB[7] = (diffSampleL * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[8];
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biquadB[8] = (diffSampleL * biquadB[4]) - (tempSample * biquadB[6]);
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diffSampleL = tempSample;
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tempSample = (diffSampleR * biquadB[2]) + biquadB[9];
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biquadB[9] = (diffSampleR * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[10];
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biquadB[10] = (diffSampleR * biquadB[4]) - (tempSample * biquadB[6]);
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diffSampleR = tempSample;
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}
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hysteresisL = (hysteresisL * (1.0-iirAmount)) + (diffSampleL * iirAmount);
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if (fabs(hysteresisL)<1.18e-37) hysteresisL = 0.0; else diffSampleL -= hysteresisL;
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if (diffSampleL > 1.571) diffSampleL = 1.571; else if (diffSampleL < -1.571) diffSampleL = -1.571;
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if (hysteresisL > 1.571) hysteresisL = 1.571; else if (hysteresisL < -1.571) hysteresisL = -1.571;
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hysteresisR = (hysteresisR * (1.0-iirAmount)) + (diffSampleR * iirAmount);
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if (fabs(hysteresisR)<1.18e-37) hysteresisR = 0.0; else diffSampleR -= hysteresisR;
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if (diffSampleR > 1.571) diffSampleR = 1.571; else if (diffSampleR < -1.571) diffSampleR = -1.571;
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if (hysteresisR > 1.571) hysteresisR = 1.571; else if (hysteresisR < -1.571) hysteresisR = -1.571;
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inputSampleL += (sin(diffSampleL)-sin(hysteresisL))*distScaling;
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inputSampleR += (sin(diffSampleR)-sin(hysteresisR))*distScaling; //apply transformer distortions
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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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 Coils2::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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double distScaling = pow(1.0-A,2);
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if (distScaling < 0.0001) distScaling = 0.0001;
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biquadA[0] = 600.0/getSampleRate();
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biquadA[1] = 0.01+(pow(B,2)*0.5);
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double iirAmount = biquadA[1]/overallscale;
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double K = tan(M_PI * biquadA[0]);
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double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
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biquadA[2] = K / biquadA[1] * norm;
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biquadA[4] = -biquadA[2];
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biquadA[5] = 2.0 * (K * K - 1.0) * norm;
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biquadA[6] = (1.0 - K / biquadA[1] + K * K) * norm;
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biquadB[0] = (21890.0-(biquadA[1]*890.0))/getSampleRate();
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biquadB[1] = 0.89;
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K = tan(M_PI * biquadB[0]);
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norm = 1.0 / (1.0 + K / biquadB[1] + K * K);
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biquadB[2] = K * K * norm;
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biquadB[3] = 2.0 * biquadB[2];
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biquadB[4] = biquadB[2];
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biquadB[5] = 2.0 * (K * K - 1.0) * norm;
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biquadB[6] = (1.0 - K / biquadB[1] + K * K) * norm;
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double wet = C;
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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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if (biquadA[0] < 0.49999) {
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double tempSample = (inputSampleL * biquadA[2]) + biquadA[7];
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biquadA[7] = -(tempSample * biquadA[5]) + biquadA[8];
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biquadA[8] = (inputSampleL * biquadA[4]) - (tempSample * biquadA[6]);
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inputSampleL = tempSample;
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tempSample = (inputSampleR * biquadA[2]) + biquadA[9];
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biquadA[9] = -(tempSample * biquadA[5]) + biquadA[10];
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biquadA[10] = (inputSampleR * biquadA[4]) - (tempSample * biquadA[6]);
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inputSampleR = tempSample; //create bandpass of clean tone
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}
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double diffSampleL = (drySampleL-inputSampleL)/distScaling;
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double diffSampleR = (drySampleR-inputSampleR)/distScaling; //mids notched out
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if (biquadB[0] < 0.49999) {
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double tempSample = (diffSampleL * biquadB[2]) + biquadB[7];
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biquadB[7] = (diffSampleL * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[8];
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biquadB[8] = (diffSampleL * biquadB[4]) - (tempSample * biquadB[6]);
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diffSampleL = tempSample;
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tempSample = (diffSampleR * biquadB[2]) + biquadB[9];
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biquadB[9] = (diffSampleR * biquadB[3]) - (tempSample * biquadB[5]) + biquadB[10];
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biquadB[10] = (diffSampleR * biquadB[4]) - (tempSample * biquadB[6]);
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diffSampleR = tempSample;
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}
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hysteresisL = (hysteresisL * (1.0-iirAmount)) + (diffSampleL * iirAmount);
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if (fabs(hysteresisL)<1.18e-37) hysteresisL = 0.0; else diffSampleL -= hysteresisL;
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if (diffSampleL > 1.571) diffSampleL = 1.571; else if (diffSampleL < -1.571) diffSampleL = -1.571;
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if (hysteresisL > 1.571) hysteresisL = 1.571; else if (hysteresisL < -1.571) hysteresisL = -1.571;
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hysteresisR = (hysteresisR * (1.0-iirAmount)) + (diffSampleR * iirAmount);
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if (fabs(hysteresisR)<1.18e-37) hysteresisR = 0.0; else diffSampleR -= hysteresisR;
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if (diffSampleR > 1.571) diffSampleR = 1.571; else if (diffSampleR < -1.571) diffSampleR = -1.571;
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if (hysteresisR > 1.571) hysteresisR = 1.571; else if (hysteresisR < -1.571) hysteresisR = -1.571;
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inputSampleL += (sin(diffSampleL)-sin(hysteresisL))*distScaling;
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inputSampleR += (sin(diffSampleR)-sin(hysteresisR))*distScaling; //apply transformer distortions
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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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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