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154 lines
6.4 KiB
C++
Executable file
154 lines
6.4 KiB
C++
Executable file
/* ========================================
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* ConsoleXSubIn - ConsoleXSubIn.h
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* Copyright (c) airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __ConsoleXSubIn_H
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#include "ConsoleXSubIn.h"
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#endif
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void ConsoleXSubIn::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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biquad[biq_freq] = 25000.0/getSampleRate();
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biquad[biq_reso] = 0.60134489;
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double K = tan(M_PI * biquad[biq_freq]);
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double norm = 1.0 / (1.0 + K / biquad[biq_reso] + K * K);
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biquad[biq_a0] = K * K * norm;
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biquad[biq_a1] = 2.0 * biquad[biq_a0];
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biquad[biq_a2] = biquad[biq_a0];
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biquad[biq_b1] = 2.0 * (K * K - 1.0) * norm;
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biquad[biq_b2] = (1.0 - K / biquad[biq_reso] + K * K) * norm;
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//ultrasonic nonlinear filter
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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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if (biquad[biq_freq] < 0.5) {
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double nlBiq = fabs(biquad[biq_a0]*(1.0+(inputSampleL*0.25))); if (nlBiq > 1.0) nlBiq = 1.0;
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double tmp = (inputSampleL * nlBiq) + biquad[biq_sL1];
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biquad[biq_sL1] = (inputSampleL * biquad[biq_a1]) - (tmp * biquad[biq_b1]) + biquad[biq_sL2];
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biquad[biq_sL2] = (inputSampleL * nlBiq) - (tmp * biquad[biq_b2]);
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inputSampleL = tmp;
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nlBiq = fabs(biquad[biq_a0]*(1.0+(inputSampleR*0.25))); if (nlBiq > 1.0) nlBiq = 1.0;
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tmp = (inputSampleR * nlBiq) + biquad[biq_sR1];
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biquad[biq_sR1] = (inputSampleR * biquad[biq_a1]) - (tmp * biquad[biq_b1]) + biquad[biq_sR2];
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biquad[biq_sR2] = (inputSampleR * nlBiq) - (tmp * biquad[biq_b2]);
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inputSampleR = tmp;
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//ultrasonic filter before anything else is done
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}
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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else if (inputSampleL > 0.0) inputSampleL = -expm1((log1p(-inputSampleL) * 0.6180339887498949));
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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else if (inputSampleL < 0.0) inputSampleL = expm1((log1p(inputSampleL) * 0.6180339887498949));
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inputSampleL *= 1.6180339887498949;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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else if (inputSampleR > 0.0) inputSampleR = -expm1((log1p(-inputSampleR) * 0.6180339887498949));
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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else if (inputSampleR < 0.0) inputSampleR = expm1((log1p(inputSampleR) * 0.6180339887498949));
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inputSampleR *= 1.6180339887498949;
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//ConsoleXSubIn is purely a decode that is followed with encode on ConsoleXSubOut
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//It allows for another filtering stage for steep distributed ultrasonic filtering
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//but pointedly has no controls: it just has to be there, first on the submix
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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 ConsoleXSubIn::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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biquad[biq_freq] = 25000.0/getSampleRate();
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biquad[biq_reso] = 0.60134489;
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double K = tan(M_PI * biquad[biq_freq]);
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double norm = 1.0 / (1.0 + K / biquad[biq_reso] + K * K);
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biquad[biq_a0] = K * K * norm;
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biquad[biq_a1] = 2.0 * biquad[biq_a0];
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biquad[biq_a2] = biquad[biq_a0];
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biquad[biq_b1] = 2.0 * (K * K - 1.0) * norm;
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biquad[biq_b2] = (1.0 - K / biquad[biq_reso] + K * K) * norm;
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//ultrasonic nonlinear filter
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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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if (biquad[biq_freq] < 0.5) {
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double nlBiq = fabs(biquad[biq_a0]*(1.0+(inputSampleL*0.25))); if (nlBiq > 1.0) nlBiq = 1.0;
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double tmp = (inputSampleL * nlBiq) + biquad[biq_sL1];
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biquad[biq_sL1] = (inputSampleL * biquad[biq_a1]) - (tmp * biquad[biq_b1]) + biquad[biq_sL2];
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biquad[biq_sL2] = (inputSampleL * nlBiq) - (tmp * biquad[biq_b2]);
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inputSampleL = tmp;
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nlBiq = fabs(biquad[biq_a0]*(1.0+(inputSampleR*0.25))); if (nlBiq > 1.0) nlBiq = 1.0;
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tmp = (inputSampleR * nlBiq) + biquad[biq_sR1];
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biquad[biq_sR1] = (inputSampleR * biquad[biq_a1]) - (tmp * biquad[biq_b1]) + biquad[biq_sR2];
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biquad[biq_sR2] = (inputSampleR * nlBiq) - (tmp * biquad[biq_b2]);
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inputSampleR = tmp;
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//ultrasonic filter before anything else is done
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}
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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else if (inputSampleL > 0.0) inputSampleL = -expm1((log1p(-inputSampleL) * 0.6180339887498949));
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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else if (inputSampleL < 0.0) inputSampleL = expm1((log1p(inputSampleL) * 0.6180339887498949));
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inputSampleL *= 1.6180339887498949;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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else if (inputSampleR > 0.0) inputSampleR = -expm1((log1p(-inputSampleR) * 0.6180339887498949));
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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else if (inputSampleR < 0.0) inputSampleR = expm1((log1p(inputSampleR) * 0.6180339887498949));
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inputSampleR *= 1.6180339887498949;
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//ConsoleXSubIn is purely a decode that is followed with encode on ConsoleXSubOut
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//It allows for another filtering stage for steep distributed ultrasonic filtering
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//but pointedly has no controls: it just has to be there, first on the submix
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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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