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https://github.com/airwindows/airwindows.git
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356 lines
No EOL
12 KiB
C++
Executable file
356 lines
No EOL
12 KiB
C++
Executable file
/* ========================================
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* Desk - Desk.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __Desk_H
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#include "Desk.h"
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#endif
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void Desk::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 gain = 0.135;
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double slewgain = 0.208;
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double prevslew = 0.333;
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double balanceB = 0.0001;
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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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slewgain *= overallscale;
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prevslew *= overallscale;
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balanceB /= overallscale;
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double balanceA = 1.0 - balanceB;
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double slew;
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double bridgerectifier;
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double combsample;
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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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//begin L
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slew = inputSampleL - lastSampleL;
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lastSampleL = inputSampleL;
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//Set up direct reference for slew
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bridgerectifier = fabs(slew*slewgain);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (slew > 0) slew = bridgerectifier/slewgain;
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else slew = -(bridgerectifier/slewgain);
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inputSampleL = (lastOutSampleL*balanceA) + (lastSampleL*balanceB) + slew;
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//go from last slewed, but include some raw values
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lastOutSampleL = inputSampleL;
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//Set up slewed reference
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combsample = fabs(drySampleL*lastSampleL);
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if (combsample > 1.0) combsample = 1.0;
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//bailout for very high input gains
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inputSampleL -= (lastSlewL * combsample * prevslew);
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lastSlewL = slew;
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//slew interaction with previous slew
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inputSampleL *= gain;
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bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleL > 0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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//drive section
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inputSampleL /= gain;
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//end L
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//begin R
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slew = inputSampleR - lastSampleR;
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lastSampleR = inputSampleR;
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//Set up direct reference for slew
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bridgerectifier = fabs(slew*slewgain);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (slew > 0) slew = bridgerectifier/slewgain;
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else slew = -(bridgerectifier/slewgain);
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inputSampleR = (lastOutSampleR*balanceA) + (lastSampleR*balanceB) + slew;
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//go from last slewed, but include some raw values
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lastOutSampleR = inputSampleR;
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//Set up slewed reference
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combsample = fabs(drySampleR*lastSampleR);
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if (combsample > 1.0) combsample = 1.0;
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//bailout for very high input gains
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inputSampleR -= (lastSlewR * combsample * prevslew);
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lastSlewR = slew;
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//slew interaction with previous slew
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inputSampleR *= gain;
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleR > 0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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//drive section
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inputSampleR /= gain;
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//end R
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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 Desk::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 gain = 0.135;
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double slewgain = 0.208;
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double prevslew = 0.333;
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double balanceB = 0.0001;
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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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slewgain *= overallscale;
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prevslew *= overallscale;
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balanceB /= overallscale;
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double balanceA = 1.0 - balanceB;
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double slew;
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double bridgerectifier;
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double combsample;
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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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//begin L
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slew = inputSampleL - lastSampleL;
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lastSampleL = inputSampleL;
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//Set up direct reference for slew
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bridgerectifier = fabs(slew*slewgain);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (slew > 0) slew = bridgerectifier/slewgain;
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else slew = -(bridgerectifier/slewgain);
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inputSampleL = (lastOutSampleL*balanceA) + (lastSampleL*balanceB) + slew;
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//go from last slewed, but include some raw values
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lastOutSampleL = inputSampleL;
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//Set up slewed reference
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combsample = fabs(drySampleL*lastSampleL);
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if (combsample > 1.0) combsample = 1.0;
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//bailout for very high input gains
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inputSampleL -= (lastSlewL * combsample * prevslew);
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lastSlewL = slew;
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//slew interaction with previous slew
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inputSampleL *= gain;
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bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleL > 0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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//drive section
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inputSampleL /= gain;
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//end L
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//begin R
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slew = inputSampleR - lastSampleR;
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lastSampleR = inputSampleR;
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//Set up direct reference for slew
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bridgerectifier = fabs(slew*slewgain);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (slew > 0) slew = bridgerectifier/slewgain;
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else slew = -(bridgerectifier/slewgain);
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inputSampleR = (lastOutSampleR*balanceA) + (lastSampleR*balanceB) + slew;
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//go from last slewed, but include some raw values
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lastOutSampleR = inputSampleR;
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//Set up slewed reference
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combsample = fabs(drySampleR*lastSampleR);
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if (combsample > 1.0) combsample = 1.0;
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//bailout for very high input gains
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inputSampleR -= (lastSlewR * combsample * prevslew);
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lastSlewR = slew;
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//slew interaction with previous slew
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inputSampleR *= gain;
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.0;
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else bridgerectifier = sin(bridgerectifier);
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if (inputSampleR > 0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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//drive section
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inputSampleR /= gain;
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//end R
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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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} |