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248 lines
9.8 KiB
C++
Executable file
248 lines
9.8 KiB
C++
Executable file
/* ========================================
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* Isolator - Isolator.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Isolator_H
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#include "Isolator.h"
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#endif
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void Isolator::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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bool bypass = (A == 1.0);
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double high = B;
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double low = C; //this gives us shelving, and
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//the ability to use the isolator as a highpass
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if (high > 0.0) bypass = false;
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if (low < 1.0) bypass = false;
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biquadA[0] = pow(A,(2.0*sqrt(overallscale)))*0.4999;
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if (biquadA[0] < 0.001) biquadA[0] = 0.001;
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biquadC[0] = biquadB[0] = biquadA[0];
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biquadA[1] = 0.5;
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biquadB[1] = 0.618033988749894848204586;
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biquadC[1] = 1.618033988749894848204586;
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double K = tan(M_PI * biquadA[0]); //lowpass
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double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
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biquadA[2] = K * K * norm;
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biquadA[3] = 2.0 * biquadA[2];
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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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K = tan(M_PI * biquadA[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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K = tan(M_PI * biquadC[0]);
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norm = 1.0 / (1.0 + K / biquadC[1] + K * K);
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biquadC[2] = K * K * norm;
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biquadC[3] = 2.0 * biquadC[2];
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biquadC[4] = biquadC[2];
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biquadC[5] = 2.0 * (K * K - 1.0) * norm;
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biquadC[6] = (1.0 - K / biquadC[1] + K * K) * norm;
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// there is a form for highpass
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// but I would suggest subtracting the lowpass from dry
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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 = *in1;
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double drySampleR = *in2;
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inputSampleL = sin(inputSampleL);
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inputSampleR = sin(inputSampleR);
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//encode Console5: good cleanness
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double outSampleL = biquadA[2]*inputSampleL+biquadA[3]*biquadA[7]+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10];
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biquadA[8] = biquadA[7]; biquadA[7] = inputSampleL; inputSampleL = outSampleL; biquadA[10] = biquadA[9]; biquadA[9] = inputSampleL; //DF1 left
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outSampleL = biquadB[2]*inputSampleL+biquadB[3]*biquadB[7]+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10];
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biquadB[8] = biquadB[7]; biquadB[7] = inputSampleL; inputSampleL = outSampleL; biquadB[10] = biquadB[9]; biquadB[9] = inputSampleL; //DF1 left
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outSampleL = biquadC[2]*inputSampleL+biquadC[3]*biquadC[7]+biquadC[4]*biquadC[8]-biquadC[5]*biquadC[9]-biquadC[6]*biquadC[10];
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biquadC[8] = biquadC[7]; biquadC[7] = inputSampleL; inputSampleL = outSampleL; biquadC[10] = biquadC[9]; biquadC[9] = inputSampleL; //DF1 left
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double outSampleR = biquadA[2]*inputSampleR+biquadA[3]*biquadA[11]+biquadA[4]*biquadA[12]-biquadA[5]*biquadA[13]-biquadA[6]*biquadA[14];
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biquadA[12] = biquadA[11]; biquadA[11] = inputSampleR; inputSampleR = outSampleR; biquadA[14] = biquadA[13]; biquadA[13] = inputSampleR; //DF1 right
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outSampleR = biquadB[2]*inputSampleR+biquadB[3]*biquadB[11]+biquadB[4]*biquadB[12]-biquadB[5]*biquadB[13]-biquadB[6]*biquadB[14];
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biquadB[12] = biquadB[11]; biquadB[11] = inputSampleR; inputSampleR = outSampleR; biquadB[14] = biquadB[13]; biquadB[13] = inputSampleR; //DF1 right
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outSampleR = biquadC[2]*inputSampleR+biquadC[3]*biquadC[11]+biquadC[4]*biquadC[12]-biquadC[5]*biquadC[13]-biquadC[6]*biquadC[14];
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biquadC[12] = biquadC[11]; biquadC[11] = inputSampleR; inputSampleR = outSampleR; biquadC[14] = biquadC[13]; biquadC[13] = inputSampleR; //DF1 right
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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inputSampleL = asin(inputSampleL);
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inputSampleR = asin(inputSampleR);
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//amplitude aspect
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if (bypass) {
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inputSampleL = drySampleL;
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inputSampleR = drySampleR;
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} else {
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inputSampleL = (inputSampleL * low) + ((drySampleL - inputSampleL)*high);
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inputSampleR = (inputSampleR * low) + ((drySampleR - inputSampleR)*high);
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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 Isolator::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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bool bypass = (A == 1.0);
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double high = B;
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double low = C; //this gives us shelving, and
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//the ability to use the isolator as a highpass
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if (high > 0.0) bypass = false;
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if (low < 1.0) bypass = false;
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biquadA[0] = pow(A,(2.0*sqrt(overallscale)))*0.4999;
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if (biquadA[0] < 0.001) biquadA[0] = 0.001;
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biquadC[0] = biquadB[0] = biquadA[0];
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biquadA[1] = 0.5;
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biquadB[1] = 0.618033988749894848204586;
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biquadC[1] = 1.618033988749894848204586;
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double K = tan(M_PI * biquadA[0]); //lowpass
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double norm = 1.0 / (1.0 + K / biquadA[1] + K * K);
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biquadA[2] = K * K * norm;
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biquadA[3] = 2.0 * biquadA[2];
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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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K = tan(M_PI * biquadA[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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K = tan(M_PI * biquadC[0]);
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norm = 1.0 / (1.0 + K / biquadC[1] + K * K);
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biquadC[2] = K * K * norm;
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biquadC[3] = 2.0 * biquadC[2];
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biquadC[4] = biquadC[2];
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biquadC[5] = 2.0 * (K * K - 1.0) * norm;
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biquadC[6] = (1.0 - K / biquadC[1] + K * K) * norm;
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// there is a form for highpass
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// but I would suggest subtracting the lowpass from dry
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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 = *in1;
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double drySampleR = *in2;
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inputSampleL = sin(inputSampleL);
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inputSampleR = sin(inputSampleR);
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//encode Console5: good cleanness
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double outSampleL = biquadA[2]*inputSampleL+biquadA[3]*biquadA[7]+biquadA[4]*biquadA[8]-biquadA[5]*biquadA[9]-biquadA[6]*biquadA[10];
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biquadA[8] = biquadA[7]; biquadA[7] = inputSampleL; inputSampleL = outSampleL; biquadA[10] = biquadA[9]; biquadA[9] = inputSampleL; //DF1 left
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outSampleL = biquadB[2]*inputSampleL+biquadB[3]*biquadB[7]+biquadB[4]*biquadB[8]-biquadB[5]*biquadB[9]-biquadB[6]*biquadB[10];
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biquadB[8] = biquadB[7]; biquadB[7] = inputSampleL; inputSampleL = outSampleL; biquadB[10] = biquadB[9]; biquadB[9] = inputSampleL; //DF1 left
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outSampleL = biquadC[2]*inputSampleL+biquadC[3]*biquadC[7]+biquadC[4]*biquadC[8]-biquadC[5]*biquadC[9]-biquadC[6]*biquadC[10];
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biquadC[8] = biquadC[7]; biquadC[7] = inputSampleL; inputSampleL = outSampleL; biquadC[10] = biquadC[9]; biquadC[9] = inputSampleL; //DF1 left
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double outSampleR = biquadA[2]*inputSampleR+biquadA[3]*biquadA[11]+biquadA[4]*biquadA[12]-biquadA[5]*biquadA[13]-biquadA[6]*biquadA[14];
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biquadA[12] = biquadA[11]; biquadA[11] = inputSampleR; inputSampleR = outSampleR; biquadA[14] = biquadA[13]; biquadA[13] = inputSampleR; //DF1 right
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outSampleR = biquadB[2]*inputSampleR+biquadB[3]*biquadB[11]+biquadB[4]*biquadB[12]-biquadB[5]*biquadB[13]-biquadB[6]*biquadB[14];
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biquadB[12] = biquadB[11]; biquadB[11] = inputSampleR; inputSampleR = outSampleR; biquadB[14] = biquadB[13]; biquadB[13] = inputSampleR; //DF1 right
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outSampleR = biquadC[2]*inputSampleR+biquadC[3]*biquadC[11]+biquadC[4]*biquadC[12]-biquadC[5]*biquadC[13]-biquadC[6]*biquadC[14];
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biquadC[12] = biquadC[11]; biquadC[11] = inputSampleR; inputSampleR = outSampleR; biquadC[14] = biquadC[13]; biquadC[13] = inputSampleR; //DF1 right
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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inputSampleL = asin(inputSampleL);
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inputSampleR = asin(inputSampleR);
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//amplitude aspect
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if (bypass) {
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inputSampleL = drySampleL;
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inputSampleR = drySampleR;
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} else {
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inputSampleL = (inputSampleL * low) + ((drySampleL - inputSampleL)*high);
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inputSampleR = (inputSampleR * low) + ((drySampleR - inputSampleR)*high);
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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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