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https://github.com/airwindows/airwindows.git
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306 lines
No EOL
10 KiB
C++
Executable file
306 lines
No EOL
10 KiB
C++
Executable file
/* ========================================
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* Distance - Distance.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __Distance_H
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#include "Distance.h"
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#endif
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void Distance::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 softslew = (pow(A*2.0,3.0)*12.0)+0.6;
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softslew *= overallscale;
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double filtercorrect = softslew / 2.0;
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double thirdfilter = softslew / 3.0;
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double levelcorrect = 1.0 + (softslew / 6.0);
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double postfilter;
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double wet = B;
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double dry = 1.0-wet;
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double bridgerectifier;
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float fpTemp;
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long double fpOld = 0.618033988749894848204586; //golden ratio!
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long double fpNew = 1.0 - fpOld;
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long double inputSampleL;
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long double inputSampleR;
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long double drySampleL;
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long double drySampleR;
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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inputSampleR = *in2;
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if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
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static int noisesource = 0;
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//this declares a variable before anything else is compiled. It won't keep assigning
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//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
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//but it lets me add this denormalization fix in a single place rather than updating
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//it in three different locations. The variable isn't thread-safe but this is only
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//a random seed and we can share it with whatever.
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleL = applyresidue;
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}
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if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
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static int noisesource = 0;
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleR = applyresidue;
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//this denormalization routine produces a white noise at -300 dB which the noise
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//shaping will interact with to produce a bipolar output, but the noise is actually
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//all positive. That should stop any variables from going denormal, and the routine
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//only kicks in if digital black is input. As a final touch, if you save to 24-bit
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//the silence will return to being digital black again.
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}
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drySampleL = inputSampleL;
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drySampleR = inputSampleR;
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inputSampleL *= softslew;
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lastclampL = clampL;
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clampL = inputSampleL - lastL;
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postfilter = changeL = fabs(clampL - lastclampL);
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postfilter += filtercorrect;
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if (changeL > 1.5707963267949) changeL = 1.5707963267949;
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bridgerectifier = (1.0-sin(changeL));
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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inputSampleL = lastL + (clampL * bridgerectifier);
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lastL = inputSampleL;
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inputSampleL /= softslew;
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inputSampleL += (thirdresultL * thirdfilter);
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inputSampleL /= (thirdfilter + 1.0);
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inputSampleL += (prevresultL * postfilter);
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inputSampleL /= (postfilter + 1.0);
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//do an IIR like thing to further squish superdistant stuff
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thirdresultL = prevresultL;
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prevresultL = inputSampleL;
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inputSampleL *= levelcorrect;
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inputSampleR *= softslew;
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lastclampR = clampR;
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clampR = inputSampleR - lastR;
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postfilter = changeR = fabs(clampR - lastclampR);
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postfilter += filtercorrect;
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if (changeR > 1.5707963267949) changeR = 1.5707963267949;
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bridgerectifier = (1.0-sin(changeR));
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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inputSampleR = lastR + (clampR * bridgerectifier);
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lastR = inputSampleR;
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inputSampleR /= softslew;
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inputSampleR += (thirdresultR * thirdfilter);
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inputSampleR /= (thirdfilter + 1.0);
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inputSampleR += (prevresultR * postfilter);
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inputSampleR /= (postfilter + 1.0);
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//do an IIR like thing to further squish superdistant stuff
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thirdresultR = prevresultR;
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prevresultR = inputSampleR;
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inputSampleR *= levelcorrect;
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if (wet < 1.0) {
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inputSampleL = (drySampleL * dry)+(inputSampleL*wet);
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inputSampleR = (drySampleR * dry)+(inputSampleR*wet);
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}
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//noise shaping to 32-bit floating point
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if (fpFlip) {
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fpTemp = inputSampleL;
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fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLA;
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fpTemp = inputSampleR;
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fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRA;
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}
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else {
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fpTemp = inputSampleL;
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fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLB;
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fpTemp = inputSampleR;
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fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRB;
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}
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fpFlip = !fpFlip;
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//end noise shaping on 32 bit output
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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 Distance::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 softslew = (pow(A*2.0,3.0)*12.0)+0.6;
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softslew *= overallscale;
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double filtercorrect = softslew / 2.0;
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double thirdfilter = softslew / 3.0;
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double levelcorrect = 1.0 + (softslew / 6.0);
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double postfilter;
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double wet = B;
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double dry = 1.0-wet;
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double bridgerectifier;
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double fpTemp; //this is different from singlereplacing
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long double fpOld = 0.618033988749894848204586; //golden ratio!
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long double fpNew = 1.0 - fpOld;
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long double inputSampleL;
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long double inputSampleR;
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long double drySampleL;
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long double drySampleR;
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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inputSampleR = *in2;
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if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
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static int noisesource = 0;
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//this declares a variable before anything else is compiled. It won't keep assigning
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//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
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//but it lets me add this denormalization fix in a single place rather than updating
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//it in three different locations. The variable isn't thread-safe but this is only
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//a random seed and we can share it with whatever.
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleL = applyresidue;
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}
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if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
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static int noisesource = 0;
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noisesource = noisesource % 1700021; noisesource++;
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int residue = noisesource * noisesource;
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residue = residue % 170003; residue *= residue;
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residue = residue % 17011; residue *= residue;
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residue = residue % 1709; residue *= residue;
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residue = residue % 173; residue *= residue;
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residue = residue % 17;
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double applyresidue = residue;
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applyresidue *= 0.00000001;
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applyresidue *= 0.00000001;
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inputSampleR = applyresidue;
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//this denormalization routine produces a white noise at -300 dB which the noise
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//shaping will interact with to produce a bipolar output, but the noise is actually
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//all positive. That should stop any variables from going denormal, and the routine
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//only kicks in if digital black is input. As a final touch, if you save to 24-bit
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//the silence will return to being digital black again.
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}
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drySampleL = inputSampleL;
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drySampleR = inputSampleR;
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inputSampleL *= softslew;
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lastclampL = clampL;
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clampL = inputSampleL - lastL;
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postfilter = changeL = fabs(clampL - lastclampL);
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postfilter += filtercorrect;
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if (changeL > 1.5707963267949) changeL = 1.5707963267949;
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bridgerectifier = (1.0-sin(changeL));
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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inputSampleL = lastL + (clampL * bridgerectifier);
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lastL = inputSampleL;
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inputSampleL /= softslew;
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inputSampleL += (thirdresultL * thirdfilter);
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inputSampleL /= (thirdfilter + 1.0);
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inputSampleL += (prevresultL * postfilter);
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inputSampleL /= (postfilter + 1.0);
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//do an IIR like thing to further squish superdistant stuff
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thirdresultL = prevresultL;
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prevresultL = inputSampleL;
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inputSampleL *= levelcorrect;
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inputSampleR *= softslew;
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lastclampR = clampR;
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clampR = inputSampleR - lastR;
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postfilter = changeR = fabs(clampR - lastclampR);
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postfilter += filtercorrect;
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if (changeR > 1.5707963267949) changeR = 1.5707963267949;
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bridgerectifier = (1.0-sin(changeR));
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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inputSampleR = lastR + (clampR * bridgerectifier);
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lastR = inputSampleR;
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inputSampleR /= softslew;
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inputSampleR += (thirdresultR * thirdfilter);
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inputSampleR /= (thirdfilter + 1.0);
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inputSampleR += (prevresultR * postfilter);
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inputSampleR /= (postfilter + 1.0);
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//do an IIR like thing to further squish superdistant stuff
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thirdresultR = prevresultR;
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prevresultR = inputSampleR;
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inputSampleR *= levelcorrect;
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if (wet < 1.0) {
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inputSampleL = (drySampleL * dry)+(inputSampleL*wet);
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inputSampleR = (drySampleR * dry)+(inputSampleR*wet);
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}
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//noise shaping to 64-bit floating point
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if (fpFlip) {
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fpTemp = inputSampleL;
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fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLA;
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fpTemp = inputSampleR;
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fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRA;
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}
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else {
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fpTemp = inputSampleL;
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fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLB;
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fpTemp = inputSampleR;
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fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRB;
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}
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fpFlip = !fpFlip;
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//end noise shaping on 64 bit output
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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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} |