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218 lines
7 KiB
C++
Executable file
218 lines
7 KiB
C++
Executable file
/* ========================================
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* PurestAir - PurestAir.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __PurestAir_H
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#include "PurestAir.h"
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#endif
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void PurestAir::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 applyTarget = (A*2.0)-1.0;
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double threshold = pow((1-fabs(applyTarget)),3);
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if (applyTarget > 0) applyTarget *= 3;
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double intensity = pow(B,2)*5.0;
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double wet = C;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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halfDrySampleL = halfwaySampleL = (inputSampleL + last1SampleL) / 2.0;
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last1SampleL = inputSampleL;
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s3L = s2L;
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s2L = s1L;
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s1L = inputSampleL;
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double m1 = (s1L-s2L)*((s1L-s2L)/1.3);
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double m2 = (s2L-s3L)*((s1L-s2L)/1.3);
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double sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
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//this will be 0 for smooth, high for SSS
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applyL += applyTarget - sense;
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applyL *= 0.5;
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if (applyL < -1.0) applyL = -1.0;
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double clamp = halfwaySampleL - halfDrySampleL;
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if (clamp > threshold) halfwaySampleL = lastSampleL + threshold;
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if (-clamp > threshold) halfwaySampleL = lastSampleL - threshold;
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lastSampleL = halfwaySampleL;
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clamp = inputSampleL - lastSampleL;
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if (clamp > threshold) inputSampleL = lastSampleL + threshold;
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if (-clamp > threshold) inputSampleL = lastSampleL - threshold;
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lastSampleL = inputSampleL;
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diffSampleL = *in1 - inputSampleL;
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halfDiffSampleL = halfDrySampleL - halfwaySampleL;
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inputSampleL = *in1 + ((diffSampleL + halfDiffSampleL)*applyL);
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//done with left channel
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halfDrySampleR = halfwaySampleR = (inputSampleR + last1SampleR) / 2.0;
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last1SampleR = inputSampleR;
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s3R = s2R;
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s2R = s1R;
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s1R = inputSampleR;
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m1 = (s1R-s2R)*((s1R-s2R)/1.3);
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m2 = (s2R-s3R)*((s1R-s2R)/1.3);
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sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
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//this will be 0 for smooth, high for SSS
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applyR += applyTarget - sense;
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applyR *= 0.5;
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if (applyR < -1.0) applyR = -1.0;
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clamp = halfwaySampleR - halfDrySampleR;
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if (clamp > threshold) halfwaySampleR = lastSampleR + threshold;
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if (-clamp > threshold) halfwaySampleR = lastSampleR - threshold;
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lastSampleR = halfwaySampleR;
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clamp = inputSampleR - lastSampleR;
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if (clamp > threshold) inputSampleR = lastSampleR + threshold;
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if (-clamp > threshold) inputSampleR = lastSampleR - threshold;
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lastSampleR = inputSampleR;
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diffSampleR = *in2 - inputSampleR;
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halfDiffSampleR = halfDrySampleR - halfwaySampleR;
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inputSampleR = *in2 + ((diffSampleR + halfDiffSampleR)*applyR);
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//done with right channel
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point 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 PurestAir::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 applyTarget = (A*2.0)-1.0;
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double threshold = pow((1-fabs(applyTarget)),3);
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if (applyTarget > 0) applyTarget *= 3;
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double intensity = pow(B,2)*5.0;
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double wet = C;
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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halfDrySampleL = halfwaySampleL = (inputSampleL + last1SampleL) / 2.0;
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last1SampleL = inputSampleL;
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s3L = s2L;
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s2L = s1L;
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s1L = inputSampleL;
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double m1 = (s1L-s2L)*((s1L-s2L)/1.3);
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double m2 = (s2L-s3L)*((s1L-s2L)/1.3);
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double sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
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//this will be 0 for smooth, high for SSS
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applyL += applyTarget - sense;
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applyL *= 0.5;
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if (applyL < -1.0) applyL = -1.0;
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double clamp = halfwaySampleL - halfDrySampleL;
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if (clamp > threshold) halfwaySampleL = lastSampleL + threshold;
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if (-clamp > threshold) halfwaySampleL = lastSampleL - threshold;
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lastSampleL = halfwaySampleL;
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clamp = inputSampleL - lastSampleL;
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if (clamp > threshold) inputSampleL = lastSampleL + threshold;
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if (-clamp > threshold) inputSampleL = lastSampleL - threshold;
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lastSampleL = inputSampleL;
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diffSampleL = *in1 - inputSampleL;
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halfDiffSampleL = halfDrySampleL - halfwaySampleL;
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inputSampleL = *in1 + ((diffSampleL + halfDiffSampleL)*applyL);
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//done with left channel
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halfDrySampleR = halfwaySampleR = (inputSampleR + last1SampleR) / 2.0;
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last1SampleR = inputSampleR;
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s3R = s2R;
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s2R = s1R;
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s1R = inputSampleR;
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m1 = (s1R-s2R)*((s1R-s2R)/1.3);
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m2 = (s2R-s3R)*((s1R-s2R)/1.3);
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sense = fabs((m1-m2)*((m1-m2)/1.3))*intensity;
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//this will be 0 for smooth, high for SSS
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applyR += applyTarget - sense;
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applyR *= 0.5;
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if (applyR < -1.0) applyR = -1.0;
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clamp = halfwaySampleR - halfDrySampleR;
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if (clamp > threshold) halfwaySampleR = lastSampleR + threshold;
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if (-clamp > threshold) halfwaySampleR = lastSampleR - threshold;
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lastSampleR = halfwaySampleR;
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clamp = inputSampleR - lastSampleR;
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if (clamp > threshold) inputSampleR = lastSampleR + threshold;
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if (-clamp > threshold) inputSampleR = lastSampleR - threshold;
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lastSampleR = inputSampleR;
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diffSampleR = *in2 - inputSampleR;
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halfDiffSampleR = halfDrySampleR - halfwaySampleR;
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inputSampleR = *in2 + ((diffSampleR + halfDiffSampleR)*applyR);
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//done with right channel
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//begin 64 bit stereo floating point dither
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//int expon; frexp((double)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//frexp((double)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//end 64 bit stereo floating point 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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