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https://github.com/airwindows/airwindows.git
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288 lines
No EOL
10 KiB
C++
Executable file
288 lines
No EOL
10 KiB
C++
Executable file
/* ========================================
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* SingleEndedTriode - SingleEndedTriode.h
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* Copyright (c) 2016 airwindows, All rights reserved
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* ======================================== */
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#ifndef __SingleEndedTriode_H
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#include "SingleEndedTriode.h"
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#endif
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void SingleEndedTriode::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 intensity = pow(A,2)*8.0;
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double triode = intensity;
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intensity +=0.001;
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double softcrossover = pow(B,3)/8.0;
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double hardcrossover = pow(C,7)/8.0;
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double wet = D;
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double dry = 1.0 - wet;
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while (--sampleFrames >= 0)
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{
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long double inputSampleL = *in1;
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long double 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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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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if (triode > 0.0)
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{
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inputSampleL *= intensity;
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inputSampleR *= intensity;
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inputSampleL -= 0.5;
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inputSampleR -= 0.5;
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long double bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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if (inputSampleL > 0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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if (inputSampleR > 0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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inputSampleL += postsine;
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inputSampleR += postsine;
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inputSampleL /= intensity;
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inputSampleR /= intensity;
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}
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if (softcrossover > 0.0)
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{
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long double bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 0.0) bridgerectifier -= (softcrossover*(bridgerectifier+sqrt(bridgerectifier)));
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if (bridgerectifier < 0.0) bridgerectifier = 0;
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if (inputSampleL > 0.0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 0.0) bridgerectifier -= (softcrossover*(bridgerectifier+sqrt(bridgerectifier)));
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if (bridgerectifier < 0.0) bridgerectifier = 0;
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if (inputSampleR > 0.0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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}
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if (hardcrossover > 0.0)
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{
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long double bridgerectifier = fabs(inputSampleL);
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bridgerectifier -= hardcrossover;
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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if (inputSampleL > 0.0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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bridgerectifier = fabs(inputSampleR);
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bridgerectifier -= hardcrossover;
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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if (inputSampleR > 0.0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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}
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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 SingleEndedTriode::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 intensity = pow(A,2)*8.0;
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double triode = intensity;
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intensity +=0.001;
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double softcrossover = pow(B,3)/8.0;
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double hardcrossover = pow(C,7)/8.0;
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double wet = D;
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double dry = 1.0 - wet;
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while (--sampleFrames >= 0)
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{
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long double inputSampleL = *in1;
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long double 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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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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if (triode > 0.0)
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{
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inputSampleL *= intensity;
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inputSampleR *= intensity;
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inputSampleL -= 0.5;
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inputSampleR -= 0.5;
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long double bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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if (inputSampleL > 0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier);
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if (inputSampleR > 0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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inputSampleL += postsine;
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inputSampleR += postsine;
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inputSampleL /= intensity;
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inputSampleR /= intensity;
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}
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if (softcrossover > 0.0)
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{
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long double bridgerectifier = fabs(inputSampleL);
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if (bridgerectifier > 0.0) bridgerectifier -= (softcrossover*(bridgerectifier+sqrt(bridgerectifier)));
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if (bridgerectifier < 0.0) bridgerectifier = 0;
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if (inputSampleL > 0.0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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bridgerectifier = fabs(inputSampleR);
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if (bridgerectifier > 0.0) bridgerectifier -= (softcrossover*(bridgerectifier+sqrt(bridgerectifier)));
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if (bridgerectifier < 0.0) bridgerectifier = 0;
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if (inputSampleR > 0.0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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}
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if (hardcrossover > 0.0)
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{
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long double bridgerectifier = fabs(inputSampleL);
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bridgerectifier -= hardcrossover;
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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if (inputSampleL > 0.0) inputSampleL = bridgerectifier;
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else inputSampleL = -bridgerectifier;
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bridgerectifier = fabs(inputSampleR);
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bridgerectifier -= hardcrossover;
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if (bridgerectifier < 0.0) bridgerectifier = 0.0;
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if (inputSampleR > 0.0) inputSampleR = bridgerectifier;
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else inputSampleR = -bridgerectifier;
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}
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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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} |