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https://github.com/airwindows/airwindows.git
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390 lines
No EOL
12 KiB
C++
Executable file
390 lines
No EOL
12 KiB
C++
Executable file
/* ========================================
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* ButterComp - ButterComp.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __ButterComp_H
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#include "ButterComp.h"
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#endif
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void ButterComp::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 = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double inputposL;
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double inputnegL;
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double calcposL;
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double calcnegL;
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double outputposL;
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double outputnegL;
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long double totalmultiplierL;
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long double inputSampleL;
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double drySampleL;
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double inputposR;
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double inputnegR;
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double calcposR;
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double calcnegR;
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double outputposR;
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double outputnegR;
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long double totalmultiplierR;
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long double inputSampleR;
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double drySampleR;
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double inputgain = pow(10.0,(A*14.0)/20.0);
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double wet = B;
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double dry = 1.0 - wet;
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double outputgain = inputgain;
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outputgain -= 1.0;
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outputgain /= 1.5;
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outputgain += 1.0;
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double divisor = 0.012 * (A / 135.0);
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divisor /= overallscale;
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double remainder = divisor;
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divisor = 1.0 - divisor;
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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 *= inputgain;
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inputSampleR *= inputgain;
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inputposL = inputSampleL + 1.0;
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if (inputposL < 0.0) inputposL = 0.0;
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outputposL = inputposL / 2.0;
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if (outputposL > 1.0) outputposL = 1.0;
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inputposL *= inputposL;
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targetposL *= divisor;
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targetposL += (inputposL * remainder);
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calcposL = pow((1.0/targetposL),2);
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inputnegL = (-inputSampleL) + 1.0;
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if (inputnegL < 0.0) inputnegL = 0.0;
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outputnegL = inputnegL / 2.0;
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if (outputnegL > 1.0) outputnegL = 1.0;
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inputnegL *= inputnegL;
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targetnegL *= divisor;
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targetnegL += (inputnegL * remainder);
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calcnegL = pow((1.0/targetnegL),2);
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//now we have mirrored targets for comp
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//outputpos and outputneg go from 0 to 1
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inputposR = inputSampleR + 1.0;
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if (inputposR < 0.0) inputposR = 0.0;
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outputposR = inputposR / 2.0;
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if (outputposR > 1.0) outputposR = 1.0;
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inputposR *= inputposR;
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targetposR *= divisor;
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targetposR += (inputposR * remainder);
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calcposR = pow((1.0/targetposR),2);
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inputnegR = (-inputSampleR) + 1.0;
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if (inputnegR < 0.0) inputnegR = 0.0;
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outputnegR = inputnegR / 2.0;
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if (outputnegR > 1.0) outputnegR = 1.0;
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inputnegR *= inputnegR;
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targetnegR *= divisor;
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targetnegR += (inputnegR * remainder);
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calcnegR = pow((1.0/targetnegR),2);
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//now we have mirrored targets for comp
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//outputpos and outputneg go from 0 to 1
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if (inputSampleL > 0)
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{ //working on pos
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controlAposL *= divisor;
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controlAposL += (calcposL*remainder);
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}
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else
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{ //working on neg
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controlAnegL *= divisor;
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controlAnegL += (calcnegL*remainder);
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}
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//this causes each of the four to update only when active and in the correct 'flip'
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if (inputSampleR > 0)
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{ //working on pos
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controlAposR *= divisor;
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controlAposR += (calcposR*remainder);
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}
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else
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{ //working on neg
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controlAnegR *= divisor;
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controlAnegR += (calcnegR*remainder);
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}
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//this causes each of the four to update only when active and in the correct 'flip'
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totalmultiplierL = (controlAposL * outputposL) + (controlAnegL * outputnegL);
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totalmultiplierR = (controlAposR * outputposR) + (controlAnegR * outputnegR);
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//this combines the sides according to flip, blending relative to the input value
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inputSampleL *= totalmultiplierL;
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inputSampleL /= outputgain;
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inputSampleR *= totalmultiplierR;
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inputSampleR /= outputgain;
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * dry);
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inputSampleR = (inputSampleR * wet) + (drySampleR * dry);
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}
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//stereo 32 bit dither, made small and tidy.
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int expon; frexpf((float)inputSampleL, &expon);
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long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
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frexpf((float)inputSampleR, &expon);
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dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
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//end 32 bit 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 ButterComp::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 = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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double inputposL;
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double inputnegL;
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double calcposL;
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double calcnegL;
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double outputposL;
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double outputnegL;
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long double totalmultiplierL;
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long double inputSampleL;
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double drySampleL;
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double inputposR;
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double inputnegR;
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double calcposR;
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double calcnegR;
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double outputposR;
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double outputnegR;
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long double totalmultiplierR;
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long double inputSampleR;
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double drySampleR;
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double inputgain = pow(10.0,(A*14.0)/20.0);
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double wet = B;
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double dry = 1.0 - wet;
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double outputgain = inputgain;
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outputgain -= 1.0;
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outputgain /= 1.5;
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outputgain += 1.0;
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double divisor = 0.012 * (A / 135.0);
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divisor /= overallscale;
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double remainder = divisor;
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divisor = 1.0 - divisor;
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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 *= inputgain;
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inputSampleR *= inputgain;
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inputposL = inputSampleL + 1.0;
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if (inputposL < 0.0) inputposL = 0.0;
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outputposL = inputposL / 2.0;
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if (outputposL > 1.0) outputposL = 1.0;
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inputposL *= inputposL;
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targetposL *= divisor;
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targetposL += (inputposL * remainder);
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calcposL = pow((1.0/targetposL),2);
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inputnegL = (-inputSampleL) + 1.0;
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if (inputnegL < 0.0) inputnegL = 0.0;
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outputnegL = inputnegL / 2.0;
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if (outputnegL > 1.0) outputnegL = 1.0;
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inputnegL *= inputnegL;
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targetnegL *= divisor;
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targetnegL += (inputnegL * remainder);
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calcnegL = pow((1.0/targetnegL),2);
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//now we have mirrored targets for comp
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//outputpos and outputneg go from 0 to 1
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inputposR = inputSampleR + 1.0;
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if (inputposR < 0.0) inputposR = 0.0;
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outputposR = inputposR / 2.0;
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if (outputposR > 1.0) outputposR = 1.0;
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inputposR *= inputposR;
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targetposR *= divisor;
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targetposR += (inputposR * remainder);
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calcposR = pow((1.0/targetposR),2);
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inputnegR = (-inputSampleR) + 1.0;
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if (inputnegR < 0.0) inputnegR = 0.0;
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outputnegR = inputnegR / 2.0;
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if (outputnegR > 1.0) outputnegR = 1.0;
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inputnegR *= inputnegR;
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targetnegR *= divisor;
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targetnegR += (inputnegR * remainder);
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calcnegR = pow((1.0/targetnegR),2);
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//now we have mirrored targets for comp
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//outputpos and outputneg go from 0 to 1
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if (inputSampleL > 0)
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{ //working on pos
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controlAposL *= divisor;
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controlAposL += (calcposL*remainder);
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}
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else
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{ //working on neg
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controlAnegL *= divisor;
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controlAnegL += (calcnegL*remainder);
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}
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//this causes each of the four to update only when active and in the correct 'flip'
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if (inputSampleR > 0)
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{ //working on pos
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controlAposR *= divisor;
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controlAposR += (calcposR*remainder);
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}
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else
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{ //working on neg
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controlAnegR *= divisor;
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controlAnegR += (calcnegR*remainder);
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}
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//this causes each of the four to update only when active and in the correct 'flip'
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totalmultiplierL = (controlAposL * outputposL) + (controlAnegL * outputnegL);
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totalmultiplierR = (controlAposR * outputposR) + (controlAnegR * outputnegR);
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//this combines the sides according to flip, blending relative to the input value
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inputSampleL *= totalmultiplierL;
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inputSampleL /= outputgain;
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inputSampleR *= totalmultiplierR;
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inputSampleR /= outputgain;
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * dry);
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inputSampleR = (inputSampleR * wet) + (drySampleR * dry);
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}
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//stereo 64 bit dither, made small and tidy.
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int expon; frexp((double)inputSampleL, &expon);
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long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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dither /= 536870912.0; //needs this to scale to 64 bit zone
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inputSampleL += (dither-fpNShapeL); fpNShapeL = dither;
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frexp((double)inputSampleR, &expon);
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dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62);
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dither /= 536870912.0; //needs this to scale to 64 bit zone
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inputSampleR += (dither-fpNShapeR); fpNShapeR = dither;
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//end 64 bit 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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} |