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/* ========================================
* VinylDither - VinylDither.h
* Copyright (c) 2016 airwindows, All rights reserved
* ======================================== */
#ifndef __VinylDither_H
#include "VinylDither.h"
#endif
void VinylDither::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double absSample;
long double inputSampleL;
long 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
absSample = ((rand()/(double)RAND_MAX) - 0.5);
nsL[0] += absSample; nsL[0] /= 2; absSample -= nsL[0];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[1] += absSample; nsL[1] /= 2; absSample -= nsL[1];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[2] += absSample; nsL[2] /= 2; absSample -= nsL[2];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[3] += absSample; nsL[3] /= 2; absSample -= nsL[3];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[4] += absSample; nsL[4] /= 2; absSample -= nsL[4];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[5] += absSample; nsL[5] /= 2; absSample -= nsL[5];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[6] += absSample; nsL[6] /= 2; absSample -= nsL[6];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[7] += absSample; nsL[7] /= 2; absSample -= nsL[7];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[8] += absSample; nsL[8] /= 2; absSample -= nsL[8];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[9] += absSample; nsL[9] /= 2; absSample -= nsL[9];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[10] += absSample; nsL[10] /= 2; absSample -= nsL[10];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[11] += absSample; nsL[11] /= 2; absSample -= nsL[11];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[12] += absSample; nsL[12] /= 2; absSample -= nsL[12];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[13] += absSample; nsL[13] /= 2; absSample -= nsL[13];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[14] += absSample; nsL[14] /= 2; absSample -= nsL[14];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[15] += absSample; nsL[15] /= 2; absSample -= nsL[15];
//install noise and then shape it
absSample += inputSampleL;
if (NSOddL > 0) NSOddL -= 0.97;
if (NSOddL < 0) NSOddL += 0.97;
NSOddL -= (NSOddL * NSOddL * NSOddL * 0.475);
NSOddL += prevL;
absSample += (NSOddL*0.475);
prevL = floor(absSample) - inputSampleL;
inputSampleL = floor(absSample);
//TenNines dither L
absSample = ((rand()/(double)RAND_MAX) - 0.5);
nsR[0] += absSample; nsR[0] /= 2; absSample -= nsR[0];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[1] += absSample; nsR[1] /= 2; absSample -= nsR[1];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[2] += absSample; nsR[2] /= 2; absSample -= nsR[2];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[3] += absSample; nsR[3] /= 2; absSample -= nsR[3];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[4] += absSample; nsR[4] /= 2; absSample -= nsR[4];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[5] += absSample; nsR[5] /= 2; absSample -= nsR[5];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[6] += absSample; nsR[6] /= 2; absSample -= nsR[6];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[7] += absSample; nsR[7] /= 2; absSample -= nsR[7];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[8] += absSample; nsR[8] /= 2; absSample -= nsR[8];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[9] += absSample; nsR[9] /= 2; absSample -= nsR[9];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[10] += absSample; nsR[10] /= 2; absSample -= nsR[10];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[11] += absSample; nsR[11] /= 2; absSample -= nsR[11];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[12] += absSample; nsR[12] /= 2; absSample -= nsR[12];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[13] += absSample; nsR[13] /= 2; absSample -= nsR[13];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[14] += absSample; nsR[14] /= 2; absSample -= nsR[14];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[15] += absSample; nsR[15] /= 2; absSample -= nsR[15];
//install noise and then shape it
absSample += inputSampleR;
if (NSOddR > 0) NSOddR -= 0.97;
if (NSOddR < 0) NSOddR += 0.97;
NSOddR -= (NSOddR * NSOddR * NSOddR * 0.475);
NSOddR += prevR;
absSample += (NSOddR*0.475);
prevR = floor(absSample) - inputSampleR;
inputSampleR = floor(absSample);
//TenNines dither R
inputSampleL /= 8388608.0;
inputSampleR /= 8388608.0;
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
void VinylDither::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double absSample;
long double inputSampleL;
long 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
absSample = ((rand()/(double)RAND_MAX) - 0.5);
nsL[0] += absSample; nsL[0] /= 2; absSample -= nsL[0];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[1] += absSample; nsL[1] /= 2; absSample -= nsL[1];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[2] += absSample; nsL[2] /= 2; absSample -= nsL[2];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[3] += absSample; nsL[3] /= 2; absSample -= nsL[3];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[4] += absSample; nsL[4] /= 2; absSample -= nsL[4];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[5] += absSample; nsL[5] /= 2; absSample -= nsL[5];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[6] += absSample; nsL[6] /= 2; absSample -= nsL[6];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[7] += absSample; nsL[7] /= 2; absSample -= nsL[7];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[8] += absSample; nsL[8] /= 2; absSample -= nsL[8];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[9] += absSample; nsL[9] /= 2; absSample -= nsL[9];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[10] += absSample; nsL[10] /= 2; absSample -= nsL[10];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[11] += absSample; nsL[11] /= 2; absSample -= nsL[11];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[12] += absSample; nsL[12] /= 2; absSample -= nsL[12];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[13] += absSample; nsL[13] /= 2; absSample -= nsL[13];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[14] += absSample; nsL[14] /= 2; absSample -= nsL[14];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsL[15] += absSample; nsL[15] /= 2; absSample -= nsL[15];
//install noise and then shape it
absSample += inputSampleL;
if (NSOddL > 0) NSOddL -= 0.97;
if (NSOddL < 0) NSOddL += 0.97;
NSOddL -= (NSOddL * NSOddL * NSOddL * 0.475);
NSOddL += prevL;
absSample += (NSOddL*0.475);
prevL = floor(absSample) - inputSampleL;
inputSampleL = floor(absSample);
//TenNines dither L
absSample = ((rand()/(double)RAND_MAX) - 0.5);
nsR[0] += absSample; nsR[0] /= 2; absSample -= nsR[0];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[1] += absSample; nsR[1] /= 2; absSample -= nsR[1];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[2] += absSample; nsR[2] /= 2; absSample -= nsR[2];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[3] += absSample; nsR[3] /= 2; absSample -= nsR[3];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[4] += absSample; nsR[4] /= 2; absSample -= nsR[4];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[5] += absSample; nsR[5] /= 2; absSample -= nsR[5];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[6] += absSample; nsR[6] /= 2; absSample -= nsR[6];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[7] += absSample; nsR[7] /= 2; absSample -= nsR[7];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[8] += absSample; nsR[8] /= 2; absSample -= nsR[8];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[9] += absSample; nsR[9] /= 2; absSample -= nsR[9];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[10] += absSample; nsR[10] /= 2; absSample -= nsR[10];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[11] += absSample; nsR[11] /= 2; absSample -= nsR[11];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[12] += absSample; nsR[12] /= 2; absSample -= nsR[12];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[13] += absSample; nsR[13] /= 2; absSample -= nsR[13];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[14] += absSample; nsR[14] /= 2; absSample -= nsR[14];
absSample += ((rand()/(double)RAND_MAX) - 0.5);
nsR[15] += absSample; nsR[15] /= 2; absSample -= nsR[15];
//install noise and then shape it
absSample += inputSampleR;
if (NSOddR > 0) NSOddR -= 0.97;
if (NSOddR < 0) NSOddR += 0.97;
NSOddR -= (NSOddR * NSOddR * NSOddR * 0.475);
NSOddR += prevR;
absSample += (NSOddR*0.475);
prevR = floor(absSample) - inputSampleR;
inputSampleR = floor(absSample);
//TenNines dither R
inputSampleL /= 8388608.0;
inputSampleR /= 8388608.0;
*out1 = inputSampleL;
*out2 = inputSampleR;
*in1++;
*in2++;
*out1++;
*out2++;
}
}
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