mirror of
https://github.com/airwindows/airwindows.git
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242 lines
No EOL
7.9 KiB
C++
Executable file
242 lines
No EOL
7.9 KiB
C++
Executable file
/* ========================================
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* BuildATPDF - BuildATPDF.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __BuildATPDF_H
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#include "BuildATPDF.h"
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#endif
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void BuildATPDF::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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f[0] = (A*2)-1;
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f[1] = (B*2)-1;
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f[2] = (C*2)-1;
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f[3] = (D*2)-1;
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f[4] = (E*2)-1;
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f[5] = (F*2)-1;
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f[6] = (G*2)-1;
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f[7] = (H*2)-1;
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f[8] = (I*2)-1;
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f[9] = (J*2)-1;
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double currentDither;
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double inputSampleL;
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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 *= 8388608.0;
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inputSampleR *= 8388608.0;
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//0-1 is now one bit, now we dither
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bL[9] = bL[8]; bL[8] = bL[7]; bL[7] = bL[6]; bL[6] = bL[5];
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bL[5] = bL[4]; bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1];
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bL[1] = bL[0]; bL[0] = (rand()/(double)RAND_MAX);
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currentDither = (bL[0] * f[0]);
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currentDither += (bL[1] * f[1]);
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currentDither += (bL[2] * f[2]);
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currentDither += (bL[3] * f[3]);
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currentDither += (bL[4] * f[4]);
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currentDither += (bL[5] * f[5]);
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currentDither += (bL[6] * f[6]);
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currentDither += (bL[7] * f[7]);
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currentDither += (bL[8] * f[8]);
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currentDither += (bL[9] * f[9]);
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inputSampleL += currentDither;
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bR[9] = bR[8]; bR[8] = bR[7]; bR[7] = bR[6]; bR[6] = bR[5];
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bR[5] = bR[4]; bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1];
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bR[1] = bR[0]; bR[0] = (rand()/(double)RAND_MAX);
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currentDither = (bR[0] * f[0]);
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currentDither += (bR[1] * f[1]);
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currentDither += (bR[2] * f[2]);
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currentDither += (bR[3] * f[3]);
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currentDither += (bR[4] * f[4]);
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currentDither += (bR[5] * f[5]);
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currentDither += (bR[6] * f[6]);
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currentDither += (bR[7] * f[7]);
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currentDither += (bR[8] * f[8]);
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currentDither += (bR[9] * f[9]);
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inputSampleR += currentDither;
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inputSampleL = floor(inputSampleL);
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inputSampleR = floor(inputSampleR);
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inputSampleL /= 8388608.0;
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inputSampleR /= 8388608.0;
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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 BuildATPDF::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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f[0] = (A*2)-1;
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f[1] = (B*2)-1;
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f[2] = (C*2)-1;
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f[3] = (D*2)-1;
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f[4] = (E*2)-1;
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f[5] = (F*2)-1;
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f[6] = (G*2)-1;
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f[7] = (H*2)-1;
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f[8] = (I*2)-1;
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f[9] = (J*2)-1;
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double currentDither;
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double inputSampleL;
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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 *= 8388608.0;
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inputSampleR *= 8388608.0;
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//0-1 is now one bit, now we dither
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bL[9] = bL[8]; bL[8] = bL[7]; bL[7] = bL[6]; bL[6] = bL[5];
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bL[5] = bL[4]; bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1];
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bL[1] = bL[0]; bL[0] = (rand()/(double)RAND_MAX);
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currentDither = (bL[0] * f[0]);
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currentDither += (bL[1] * f[1]);
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currentDither += (bL[2] * f[2]);
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currentDither += (bL[3] * f[3]);
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currentDither += (bL[4] * f[4]);
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currentDither += (bL[5] * f[5]);
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currentDither += (bL[6] * f[6]);
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currentDither += (bL[7] * f[7]);
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currentDither += (bL[8] * f[8]);
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currentDither += (bL[9] * f[9]);
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inputSampleL += currentDither;
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bR[9] = bR[8]; bR[8] = bR[7]; bR[7] = bR[6]; bR[6] = bR[5];
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bR[5] = bR[4]; bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1];
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bR[1] = bR[0]; bR[0] = (rand()/(double)RAND_MAX);
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currentDither = (bR[0] * f[0]);
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currentDither += (bR[1] * f[1]);
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currentDither += (bR[2] * f[2]);
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currentDither += (bR[3] * f[3]);
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currentDither += (bR[4] * f[4]);
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currentDither += (bR[5] * f[5]);
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currentDither += (bR[6] * f[6]);
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currentDither += (bR[7] * f[7]);
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currentDither += (bR[8] * f[8]);
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currentDither += (bR[9] * f[9]);
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inputSampleR += currentDither;
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inputSampleL = floor(inputSampleL);
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inputSampleR = floor(inputSampleR);
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inputSampleL /= 8388608.0;
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inputSampleR /= 8388608.0;
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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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} |