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227 lines
No EOL
9.6 KiB
C++
Executable file
227 lines
No EOL
9.6 KiB
C++
Executable file
/* ========================================
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* Slew2 - Slew2.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Slew2_H
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#include "Slew2.h"
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#endif
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void Slew2::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 overallscale = 2.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double clamp;
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double threshold = pow((1-A),4)/overallscale;
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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 (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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LataDrySample = inputSampleL;
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RataDrySample = inputSampleR;
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LataHalfDrySample = LataHalfwaySample = (inputSampleL + LataLast1Sample + ((-LataLast2Sample + LataLast3Sample) * LataUpsampleHighTweak)) / 2.0;
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LataLast3Sample = LataLast2Sample; LataLast2Sample = LataLast1Sample; LataLast1Sample = inputSampleL;
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//setting up oversampled special antialiasing
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//begin first half- change inputSample -> LataHalfwaySample, LataDrySample -> LataHalfDrySample
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clamp = LataHalfwaySample - LataHalfDrySample;
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if (clamp > threshold)
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LataHalfwaySample = lastSampleL + threshold;
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if (-clamp > threshold)
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LataHalfwaySample = lastSampleL - threshold;
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lastSampleL = LataHalfwaySample;
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//end first half
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//begin antialiasing section for halfway sample
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LataC = LataHalfwaySample - LataHalfDrySample;
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if (LataFlip) {LataA *= LataDecay; LataB *= LataDecay; LataA += LataC; LataB -= LataC; LataC = LataA;}
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else {LataB *= LataDecay; LataA *= LataDecay; LataB += LataC; LataA -= LataC; LataC = LataB;}
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LataHalfDiffSample = (LataC * LataDecay); LataFlip = !LataFlip;
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//end antialiasing section for halfway sample
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//begin second half- inputSample and LataDrySample handled separately here
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clamp = inputSampleL - lastSampleL;
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if (clamp > threshold)
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inputSampleL = lastSampleL + threshold;
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if (-clamp > threshold)
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inputSampleL = lastSampleL - threshold;
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lastSampleL = inputSampleL;
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//end second half
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//begin antialiasing section for input sample
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LataC = inputSampleL - LataDrySample;
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if (LataFlip) {LataA *= LataDecay; LataB *= LataDecay; LataA += LataC; LataB -= LataC; LataC = LataA;}
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else {LataB *= LataDecay; LataA *= LataDecay; LataB += LataC; LataA -= LataC; LataC = LataB;}
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LataDiffSample = (LataC * LataDecay); LataFlip = !LataFlip;
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//end antialiasing section for input sample
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inputSampleL = LataDrySample; inputSampleL += ((LataDiffSample + LataHalfDiffSample + LataPrevDiffSample) / 0.734);
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LataPrevDiffSample = LataDiffSample / 2.0;
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//apply processing as difference to non-oversampled raw input
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RataHalfDrySample = RataHalfwaySample = (inputSampleR + RataLast1Sample + ((-RataLast2Sample + RataLast3Sample) * RataUpsampleHighTweak)) / 2.0;
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RataLast3Sample = RataLast2Sample; RataLast2Sample = RataLast1Sample; RataLast1Sample = inputSampleR;
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//setting up oversampled special antialiasing
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//begin first half- change inputSample -> RataHalfwaySample, RataDrySample -> RataHalfDrySample
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clamp = RataHalfwaySample - RataHalfDrySample;
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if (clamp > threshold)
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RataHalfwaySample = lastSampleR + threshold;
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if (-clamp > threshold)
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RataHalfwaySample = lastSampleR - threshold;
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lastSampleR = RataHalfwaySample;
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//end first half
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//begin antialiasing section for halfway sample
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RataC = RataHalfwaySample - RataHalfDrySample;
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if (RataFlip) {RataA *= RataDecay; RataB *= RataDecay; RataA += RataC; RataB -= RataC; RataC = RataA;}
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else {RataB *= RataDecay; RataA *= RataDecay; RataB += RataC; RataA -= RataC; RataC = RataB;}
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RataHalfDiffSample = (RataC * RataDecay); RataFlip = !RataFlip;
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//end antialiasing section for halfway sample
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//begin second half- inputSample and RataDrySample handled separately here
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clamp = inputSampleR - lastSampleR;
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if (clamp > threshold)
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inputSampleR = lastSampleR + threshold;
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if (-clamp > threshold)
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inputSampleR = lastSampleR - threshold;
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lastSampleR = inputSampleR;
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//end second half
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//begin antialiasing section for input sample
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RataC = inputSampleR - RataDrySample;
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if (RataFlip) {RataA *= RataDecay; RataB *= RataDecay; RataA += RataC; RataB -= RataC; RataC = RataA;}
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else {RataB *= RataDecay; RataA *= RataDecay; RataB += RataC; RataA -= RataC; RataC = RataB;}
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RataDiffSample = (RataC * RataDecay); RataFlip = !RataFlip;
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//end antialiasing section for input sample
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inputSampleR = RataDrySample; inputSampleR += ((RataDiffSample + RataHalfDiffSample + RataPrevDiffSample) / 0.734);
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RataPrevDiffSample = RataDiffSample / 2.0;
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//apply processing as difference to non-oversampled raw input
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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 Slew2::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 overallscale = 2.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double clamp;
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double threshold = pow((1-A),4)/overallscale;
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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 (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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LataDrySample = inputSampleL;
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RataDrySample = inputSampleR;
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LataHalfDrySample = LataHalfwaySample = (inputSampleL + LataLast1Sample + ((-LataLast2Sample + LataLast3Sample) * LataUpsampleHighTweak)) / 2.0;
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LataLast3Sample = LataLast2Sample; LataLast2Sample = LataLast1Sample; LataLast1Sample = inputSampleL;
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//setting up oversampled special antialiasing
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//begin first half- change inputSample -> LataHalfwaySample, LataDrySample -> LataHalfDrySample
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clamp = LataHalfwaySample - LataHalfDrySample;
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if (clamp > threshold)
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LataHalfwaySample = lastSampleL + threshold;
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if (-clamp > threshold)
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LataHalfwaySample = lastSampleL - threshold;
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lastSampleL = LataHalfwaySample;
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//end first half
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//begin antialiasing section for halfway sample
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LataC = LataHalfwaySample - LataHalfDrySample;
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if (LataFlip) {LataA *= LataDecay; LataB *= LataDecay; LataA += LataC; LataB -= LataC; LataC = LataA;}
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else {LataB *= LataDecay; LataA *= LataDecay; LataB += LataC; LataA -= LataC; LataC = LataB;}
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LataHalfDiffSample = (LataC * LataDecay); LataFlip = !LataFlip;
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//end antialiasing section for halfway sample
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//begin second half- inputSample and LataDrySample handled separately here
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clamp = inputSampleL - lastSampleL;
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if (clamp > threshold)
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inputSampleL = lastSampleL + threshold;
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if (-clamp > threshold)
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inputSampleL = lastSampleL - threshold;
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lastSampleL = inputSampleL;
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//end second half
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//begin antialiasing section for input sample
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LataC = inputSampleL - LataDrySample;
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if (LataFlip) {LataA *= LataDecay; LataB *= LataDecay; LataA += LataC; LataB -= LataC; LataC = LataA;}
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else {LataB *= LataDecay; LataA *= LataDecay; LataB += LataC; LataA -= LataC; LataC = LataB;}
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LataDiffSample = (LataC * LataDecay); LataFlip = !LataFlip;
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//end antialiasing section for input sample
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inputSampleL = LataDrySample; inputSampleL += ((LataDiffSample + LataHalfDiffSample + LataPrevDiffSample) / 0.734);
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LataPrevDiffSample = LataDiffSample / 2.0;
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//apply processing as difference to non-oversampled raw input
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RataHalfDrySample = RataHalfwaySample = (inputSampleR + RataLast1Sample + ((-RataLast2Sample + RataLast3Sample) * RataUpsampleHighTweak)) / 2.0;
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RataLast3Sample = RataLast2Sample; RataLast2Sample = RataLast1Sample; RataLast1Sample = inputSampleR;
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//setting up oversampled special antialiasing
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//begin first half- change inputSample -> RataHalfwaySample, RataDrySample -> RataHalfDrySample
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clamp = RataHalfwaySample - RataHalfDrySample;
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if (clamp > threshold)
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RataHalfwaySample = lastSampleR + threshold;
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if (-clamp > threshold)
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RataHalfwaySample = lastSampleR - threshold;
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lastSampleR = RataHalfwaySample;
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//end first half
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//begin antialiasing section for halfway sample
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RataC = RataHalfwaySample - RataHalfDrySample;
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if (RataFlip) {RataA *= RataDecay; RataB *= RataDecay; RataA += RataC; RataB -= RataC; RataC = RataA;}
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else {RataB *= RataDecay; RataA *= RataDecay; RataB += RataC; RataA -= RataC; RataC = RataB;}
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RataHalfDiffSample = (RataC * RataDecay); RataFlip = !RataFlip;
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//end antialiasing section for halfway sample
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//begin second half- inputSample and RataDrySample handled separately here
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clamp = inputSampleR - lastSampleR;
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if (clamp > threshold)
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inputSampleR = lastSampleR + threshold;
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if (-clamp > threshold)
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inputSampleR = lastSampleR - threshold;
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lastSampleR = inputSampleR;
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//end second half
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//begin antialiasing section for input sample
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RataC = inputSampleR - RataDrySample;
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if (RataFlip) {RataA *= RataDecay; RataB *= RataDecay; RataA += RataC; RataB -= RataC; RataC = RataA;}
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else {RataB *= RataDecay; RataA *= RataDecay; RataB += RataC; RataA -= RataC; RataC = RataB;}
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RataDiffSample = (RataC * RataDecay); RataFlip = !RataFlip;
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//end antialiasing section for input sample
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inputSampleR = RataDrySample; inputSampleR += ((RataDiffSample + RataHalfDiffSample + RataPrevDiffSample) / 0.734);
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RataPrevDiffSample = RataDiffSample / 2.0;
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//apply processing as difference to non-oversampled raw input
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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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} |