mirror of
https://github.com/airwindows/airwindows.git
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288 lines
No EOL
8.9 KiB
C++
Executable file
288 lines
No EOL
8.9 KiB
C++
Executable file
/* ========================================
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* Point - Point.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __Point_H
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#include "Point.h"
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#endif
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void Point::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 gaintrim = pow(10.0,((A*24.0)-12.0)/20);
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double nibDiv = 1 / pow(C+0.2,7);
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nibDiv /= overallscale;
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double nobDiv;
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if (((B*2.0)-1.0) > 0) nobDiv = nibDiv / (1.001-((B*2.0)-1.0));
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else nobDiv = nibDiv * (1.001-pow(((B*2.0)-1.0)*0.75,2));
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double nibnobFactor = 0.0; //start with the fallthrough value, why not
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double absolute;
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long double inputSampleL;
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long double inputSampleR;
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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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inputSampleL *= gaintrim;
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absolute = fabs(inputSampleL);
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if (fpFlip)
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{
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nibAL = nibAL + (absolute / nibDiv);
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nibAL = nibAL / (1 + (1/nibDiv));
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nobAL = nobAL + (absolute / nobDiv);
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nobAL = nobAL / (1 + (1/nobDiv));
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if (nobAL > 0)
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{
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nibnobFactor = nibAL / nobAL;
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}
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}
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else
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{
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nibBL = nibBL + (absolute / nibDiv);
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nibBL = nibBL / (1 + (1/nibDiv));
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nobBL = nobBL + (absolute / nobDiv);
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nobBL = nobBL / (1 + (1/nobDiv));
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if (nobBL > 0)
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{
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nibnobFactor = nibBL / nobBL;
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}
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}
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inputSampleL *= nibnobFactor;
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inputSampleR *= gaintrim;
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absolute = fabs(inputSampleR);
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if (fpFlip)
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{
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nibAR = nibAR + (absolute / nibDiv);
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nibAR = nibAR / (1 + (1/nibDiv));
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nobAR = nobAR + (absolute / nobDiv);
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nobAR = nobAR / (1 + (1/nobDiv));
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if (nobAR > 0)
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{
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nibnobFactor = nibAR / nobAR;
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}
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}
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else
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{
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nibBR = nibBR + (absolute / nibDiv);
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nibBR = nibBR / (1 + (1/nibDiv));
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nobBR = nobBR + (absolute / nobDiv);
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nobBR = nobBR / (1 + (1/nobDiv));
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if (nobBR > 0)
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{
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nibnobFactor = nibBR / nobBR;
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}
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}
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inputSampleR *= nibnobFactor;
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fpFlip = !fpFlip;
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//stereo 32 bit dither, made small and tidy.
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int expon; frexpf((float)inputSampleL, &expon);
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long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
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frexpf((float)inputSampleR, &expon);
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dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
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//end 32 bit 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 Point::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 gaintrim = pow(10.0,((A*24.0)-12.0)/20);
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double nibDiv = 1 / pow(C+0.2,7);
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nibDiv /= overallscale;
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double nobDiv;
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if (((B*2.0)-1.0) > 0) nobDiv = nibDiv / (1.001-((B*2.0)-1.0));
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else nobDiv = nibDiv * (1.001-pow(((B*2.0)-1.0)*0.75,2));
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double nibnobFactor = 0.0; //start with the fallthrough value, why not
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double absolute;
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long double inputSampleL;
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long double inputSampleR;
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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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inputSampleL *= gaintrim;
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absolute = fabs(inputSampleL);
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if (fpFlip)
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{
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nibAL = nibAL + (absolute / nibDiv);
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nibAL = nibAL / (1 + (1/nibDiv));
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nobAL = nobAL + (absolute / nobDiv);
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nobAL = nobAL / (1 + (1/nobDiv));
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if (nobAL > 0)
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{
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nibnobFactor = nibAL / nobAL;
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}
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}
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else
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{
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nibBL = nibBL + (absolute / nibDiv);
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nibBL = nibBL / (1 + (1/nibDiv));
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nobBL = nobBL + (absolute / nobDiv);
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nobBL = nobBL / (1 + (1/nobDiv));
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if (nobBL > 0)
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{
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nibnobFactor = nibBL / nobBL;
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}
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}
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inputSampleL *= nibnobFactor;
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inputSampleR *= gaintrim;
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absolute = fabs(inputSampleR);
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if (fpFlip)
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{
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nibAR = nibAR + (absolute / nibDiv);
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nibAR = nibAR / (1 + (1/nibDiv));
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nobAR = nobAR + (absolute / nobDiv);
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nobAR = nobAR / (1 + (1/nobDiv));
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if (nobAR > 0)
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{
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nibnobFactor = nibAR / nobAR;
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}
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}
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else
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{
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nibBR = nibBR + (absolute / nibDiv);
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nibBR = nibBR / (1 + (1/nibDiv));
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nobBR = nobBR + (absolute / nobDiv);
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nobBR = nobBR / (1 + (1/nobDiv));
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if (nobBR > 0)
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{
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nibnobFactor = nibBR / nobBR;
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}
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}
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inputSampleR *= nibnobFactor;
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fpFlip = !fpFlip;
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//stereo 64 bit dither, made small and tidy.
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int expon; frexp((double)inputSampleL, &expon);
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long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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dither /= 536870912.0; //needs this to scale to 64 bit zone
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inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
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frexp((double)inputSampleR, &expon);
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dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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dither /= 536870912.0; //needs this to scale to 64 bit zone
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inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
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//end 64 bit 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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} |