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/* ========================================
* BuildATPDF - BuildATPDF.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __BuildATPDF_H
#include "BuildATPDF.h"
#endif
void BuildATPDF::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
f[0] = (A*2)-1;
f[1] = (B*2)-1;
f[2] = (C*2)-1;
f[3] = (D*2)-1;
f[4] = (E*2)-1;
f[5] = (F*2)-1;
f[6] = (G*2)-1;
f[7] = (H*2)-1;
f[8] = (I*2)-1;
f[9] = (J*2)-1;
double currentDither;
double inputSampleL;
double inputSampleR;
while (--sampleFrames >= 0)
{
inputSampleL = *in1;
inputSampleR = *in2;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL = applyresidue;
}
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
static int noisesource = 0;
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
inputSampleL *= 8388608.0;
inputSampleR *= 8388608.0;
//0-1 is now one bit, now we dither
bL[9] = bL[8]; bL[8] = bL[7]; bL[7] = bL[6]; bL[6] = bL[5];
bL[5] = bL[4]; bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1];
bL[1] = bL[0]; bL[0] = (rand()/(double)RAND_MAX);
currentDither = (bL[0] * f[0]);
currentDither += (bL[1] * f[1]);
currentDither += (bL[2] * f[2]);
currentDither += (bL[3] * f[3]);
currentDither += (bL[4] * f[4]);
currentDither += (bL[5] * f[5]);
currentDither += (bL[6] * f[6]);
currentDither += (bL[7] * f[7]);
currentDither += (bL[8] * f[8]);
currentDither += (bL[9] * f[9]);
inputSampleL += currentDither;
bR[9] = bR[8]; bR[8] = bR[7]; bR[7] = bR[6]; bR[6] = bR[5];
bR[5] = bR[4]; bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1];
bR[1] = bR[0]; bR[0] = (rand()/(double)RAND_MAX);
currentDither = (bR[0] * f[0]);
currentDither += (bR[1] * f[1]);
currentDither += (bR[2] * f[2]);
currentDither += (bR[3] * f[3]);
currentDither += (bR[4] * f[4]);
currentDither += (bR[5] * f[5]);
currentDither += (bR[6] * f[6]);
currentDither += (bR[7] * f[7]);
currentDither += (bR[8] * f[8]);
currentDither += (bR[9] * f[9]);
inputSampleR += currentDither;
inputSampleL = floor(inputSampleL);
inputSampleR = floor(inputSampleR);
inputSampleL /= 8388608.0;
inputSampleR /= 8388608.0;
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void BuildATPDF::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
f[0] = (A*2)-1;
f[1] = (B*2)-1;
f[2] = (C*2)-1;
f[3] = (D*2)-1;
f[4] = (E*2)-1;
f[5] = (F*2)-1;
f[6] = (G*2)-1;
f[7] = (H*2)-1;
f[8] = (I*2)-1;
f[9] = (J*2)-1;
double currentDither;
double inputSampleL;
double inputSampleR;
while (--sampleFrames >= 0)
{
inputSampleL = *in1;
inputSampleR = *in2;
if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
static int noisesource = 0;
//this declares a variable before anything else is compiled. It won't keep assigning
//it to 0 for every sample, it's as if the declaration doesn't exist in this context,
//but it lets me add this denormalization fix in a single place rather than updating
//it in three different locations. The variable isn't thread-safe but this is only
//a random seed and we can share it with whatever.
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleL = applyresidue;
}
if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
static int noisesource = 0;
noisesource = noisesource % 1700021; noisesource++;
int residue = noisesource * noisesource;
residue = residue % 170003; residue *= residue;
residue = residue % 17011; residue *= residue;
residue = residue % 1709; residue *= residue;
residue = residue % 173; residue *= residue;
residue = residue % 17;
double applyresidue = residue;
applyresidue *= 0.00000001;
applyresidue *= 0.00000001;
inputSampleR = applyresidue;
//this denormalization routine produces a white noise at -300 dB which the noise
//shaping will interact with to produce a bipolar output, but the noise is actually
//all positive. That should stop any variables from going denormal, and the routine
//only kicks in if digital black is input. As a final touch, if you save to 24-bit
//the silence will return to being digital black again.
}
inputSampleL *= 8388608.0;
inputSampleR *= 8388608.0;
//0-1 is now one bit, now we dither
bL[9] = bL[8]; bL[8] = bL[7]; bL[7] = bL[6]; bL[6] = bL[5];
bL[5] = bL[4]; bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1];
bL[1] = bL[0]; bL[0] = (rand()/(double)RAND_MAX);
currentDither = (bL[0] * f[0]);
currentDither += (bL[1] * f[1]);
currentDither += (bL[2] * f[2]);
currentDither += (bL[3] * f[3]);
currentDither += (bL[4] * f[4]);
currentDither += (bL[5] * f[5]);
currentDither += (bL[6] * f[6]);
currentDither += (bL[7] * f[7]);
currentDither += (bL[8] * f[8]);
currentDither += (bL[9] * f[9]);
inputSampleL += currentDither;
bR[9] = bR[8]; bR[8] = bR[7]; bR[7] = bR[6]; bR[6] = bR[5];
bR[5] = bR[4]; bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1];
bR[1] = bR[0]; bR[0] = (rand()/(double)RAND_MAX);
currentDither = (bR[0] * f[0]);
currentDither += (bR[1] * f[1]);
currentDither += (bR[2] * f[2]);
currentDither += (bR[3] * f[3]);
currentDither += (bR[4] * f[4]);
currentDither += (bR[5] * f[5]);
currentDither += (bR[6] * f[6]);
currentDither += (bR[7] * f[7]);
currentDither += (bR[8] * f[8]);
currentDither += (bR[9] * f[9]);
inputSampleR += currentDither;
inputSampleL = floor(inputSampleL);
inputSampleR = floor(inputSampleR);
inputSampleL /= 8388608.0;
inputSampleR /= 8388608.0;
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
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