mirror of
https://github.com/airwindows/airwindows.git
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235 lines
No EOL
8.6 KiB
C++
235 lines
No EOL
8.6 KiB
C++
/* ========================================
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* PurestDrive - PurestDrive.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __PurestDrive_H
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#include "PurestDrive.h"
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#endif
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void PurestDrive::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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float fpTemp;
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long double fpOld = 0.618033988749894848204586; //golden ratio!
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long double fpNew = 1.0 - fpOld;
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double intensity = A;
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double drySampleL;
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double drySampleR;
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long double inputSampleL;
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long double inputSampleR;
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double apply;
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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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drySampleL = inputSampleL;
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drySampleR = inputSampleR;
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inputSampleL = sin(inputSampleL);
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//basic distortion factor
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apply = (fabs(previousSampleL + inputSampleL) / 2.0) * intensity;
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//saturate less if previous sample was undistorted and low level, or if it was
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//inverse polarity. Lets through highs and brightness more.
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inputSampleL = (drySampleL * (1.0 - apply)) + (inputSampleL * apply);
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//dry-wet control for intensity also has FM modulation to clean up highs
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previousSampleL = sin(drySampleL);
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//apply the sine while storing previous sample
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inputSampleR = sin(inputSampleR);
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//basic distortion factor
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apply = (fabs(previousSampleR + inputSampleR) / 2.0) * intensity;
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//saturate less if previous sample was undistorted and low level, or if it was
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//inverse polarity. Lets through highs and brightness more.
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inputSampleR = (drySampleR * (1.0 - apply)) + (inputSampleR * apply);
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//dry-wet control for intensity also has FM modulation to clean up highs
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previousSampleR = sin(drySampleR);
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//apply the sine while storing previous sample
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//noise shaping to 32-bit floating point
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if (fpFlip) {
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fpTemp = inputSampleL;
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fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLA;
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fpTemp = inputSampleR;
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fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRA;
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}
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else {
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fpTemp = inputSampleL;
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fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLB;
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fpTemp = inputSampleR;
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fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRB;
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}
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fpFlip = !fpFlip;
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//end noise shaping on 32 bit output
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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 PurestDrive::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 fpTemp;
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long double fpOld = 0.618033988749894848204586; //golden ratio!
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long double fpNew = 1.0 - fpOld;
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double intensity = A;
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double drySampleL;
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double drySampleR;
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long double inputSampleL;
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long double inputSampleR;
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double apply;
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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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drySampleL = inputSampleL;
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drySampleR = inputSampleR;
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inputSampleL = sin(inputSampleL);
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//basic distortion factor
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apply = (fabs(previousSampleL + inputSampleL) / 2.0) * intensity;
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//saturate less if previous sample was undistorted and low level, or if it was
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//inverse polarity. Lets through highs and brightness more.
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inputSampleL = (drySampleL * (1.0 - apply)) + (inputSampleL * apply);
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//dry-wet control for intensity also has FM modulation to clean up highs
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previousSampleL = sin(drySampleL);
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//apply the sine while storing previous sample
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inputSampleR = sin(inputSampleR);
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//basic distortion factor
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apply = (fabs(previousSampleR + inputSampleR) / 2.0) * intensity;
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//saturate less if previous sample was undistorted and low level, or if it was
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//inverse polarity. Lets through highs and brightness more.
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inputSampleR = (drySampleR * (1.0 - apply)) + (inputSampleR * apply);
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//dry-wet control for intensity also has FM modulation to clean up highs
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previousSampleR = sin(drySampleR);
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//apply the sine while storing previous sample
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//noise shaping to 64-bit floating point
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if (fpFlip) {
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fpTemp = inputSampleL;
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fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLA;
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fpTemp = inputSampleR;
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fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRA;
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}
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else {
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fpTemp = inputSampleL;
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fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew);
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inputSampleL += fpNShapeLB;
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fpTemp = inputSampleR;
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fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew);
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inputSampleR += fpNShapeRB;
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}
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fpFlip = !fpFlip;
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//end noise shaping on 64 bit output
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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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} |