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https://github.com/airwindows/airwindows.git
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208 lines
6.6 KiB
C++
Executable file
208 lines
6.6 KiB
C++
Executable file
/* ========================================
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* uLawEncode - uLawEncode.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __uLawEncode_H
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#include "uLawEncode.h"
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#endif
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void uLawEncode::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 gain = A;
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double wet = B;
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//removed extra dry variable
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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static int noisesourceL = 0;
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static int noisesourceR = 850010;
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int residue;
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double applyresidue;
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noisesourceL = noisesourceL % 1700021; noisesourceL++;
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residue = noisesourceL * noisesourceL;
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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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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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if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
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inputSampleL -= applyresidue;
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}
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noisesourceR = noisesourceR % 1700021; noisesourceR++;
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residue = noisesourceR * noisesourceR;
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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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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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if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
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inputSampleR -= applyresidue;
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}
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//for live air, we always apply the dither noise. Then, if our result is
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//effectively digital black, we'll subtract it auLawEncode. We want a 'air' hiss
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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if (gain != 1.0) {
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inputSampleL *= gain;
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inputSampleR *= gain;
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}
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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if (inputSampleL > 0) inputSampleL = log(1.0+(255*fabs(inputSampleL))) / log(256);
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if (inputSampleL < 0) inputSampleL = -log(1.0+(255*fabs(inputSampleL))) / log(256);
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if (inputSampleR > 0) inputSampleR = log(1.0+(255*fabs(inputSampleR))) / log(256);
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if (inputSampleR < 0) inputSampleR = -log(1.0+(255*fabs(inputSampleR))) / log(256);
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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}
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void uLawEncode::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 gain = A;
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double wet = B;
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//removed extra dry variable
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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static int noisesourceL = 0;
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static int noisesourceR = 850010;
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int residue;
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double applyresidue;
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noisesourceL = noisesourceL % 1700021; noisesourceL++;
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residue = noisesourceL * noisesourceL;
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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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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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if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) {
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inputSampleL -= applyresidue;
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}
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noisesourceR = noisesourceR % 1700021; noisesourceR++;
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residue = noisesourceR * noisesourceR;
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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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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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if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) {
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inputSampleR -= applyresidue;
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}
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//for live air, we always apply the dither noise. Then, if our result is
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//effectively digital black, we'll subtract it auLawEncode. We want a 'air' hiss
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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if (gain != 1.0) {
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inputSampleL *= gain;
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inputSampleR *= gain;
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}
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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if (inputSampleL > 0) inputSampleL = log(1.0+(255*fabs(inputSampleL))) / log(256);
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if (inputSampleL < 0) inputSampleL = -log(1.0+(255*fabs(inputSampleL))) / log(256);
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if (inputSampleR > 0) inputSampleR = log(1.0+(255*fabs(inputSampleR))) / log(256);
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if (inputSampleR < 0) inputSampleR = -log(1.0+(255*fabs(inputSampleR))) / log(256);
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if (wet !=1.0) {
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inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet));
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inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet));
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}
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//begin 64 bit stereo floating point dither
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//int expon; frexp((double)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//frexp((double)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//end 64 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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*in1++;
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*in2++;
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*out1++;
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*out2++;
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}
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}
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