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109 lines
No EOL
2.7 KiB
C++
Executable file
109 lines
No EOL
2.7 KiB
C++
Executable file
/* ========================================
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* MidSide - MidSide.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __MidSide_H
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#include "MidSide.h"
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#endif
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void MidSide::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 inputSampleL;
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double inputSampleR;
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double mid;
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double side;
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double sidegain = A * 2.0;
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double midgain = 2.0 - sidegain;
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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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mid = inputSampleL + inputSampleR;
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side = inputSampleL - inputSampleR;
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mid *= midgain;
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side *= sidegain;
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//begin 32 bit floating point dither
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int expon; frexpf((float)mid, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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mid += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit floating point dither
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//begin 32 bit floating point dither
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frexpf((float)side, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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side += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit floating point dither
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*out1 = mid;
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*out2 = side;
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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 MidSide::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 inputSampleL;
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double inputSampleR;
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double mid;
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double side;
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double sidegain = A * 2.0;
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double midgain = 2.0 - sidegain;
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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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mid = inputSampleL + inputSampleR;
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side = inputSampleL - inputSampleR;
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mid *= midgain;
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side *= sidegain;
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//stereo 64 bit dither, made small and tidy.
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//int expon; frexpf((float)mid, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//mid += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit floating point dither
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//frexpf((float)side, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//side += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 64 bit dither
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*out1 = mid;
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*out2 = side;
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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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} |