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122 lines
3.9 KiB
C++
Executable file
122 lines
3.9 KiB
C++
Executable file
/* ========================================
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* Balanced - Balanced.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Balanced_H
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#include "Balanced.h"
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#endif
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void Balanced::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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int bitshiftBalanced = (A * 8);
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double gain = 1.0;
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switch (bitshiftBalanced)
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{
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case 0: gain = 0.5; break;
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case 1: gain = 1.0; break;
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case 2: gain = 2.0; break;
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case 3: gain = 4.0; break;
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case 4: gain = 8.0; break;
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case 5: gain = 16.0; break;
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case 6: gain = 32.0; break;
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case 7: gain = 64.0; break;
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case 8: gain = 128.0; break;
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}
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//we are directly punching in the gain values rather than calculating them
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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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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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double side = inputSampleL - inputSampleR;
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//tip is left, to add negative ring (right) to combine 'em is the same as subtracting them
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//end result is, mono output is made up of half of each balanced input combined. Note that we don't just
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//flip the ring input, because we need to combine them to cancel out interference.
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inputSampleL = side*gain;
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inputSampleR = side*gain;
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//assign mono as result of balancing of channels
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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 Balanced::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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int bitshiftBalanced = (A * 8);
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double gain = 1.0;
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switch (bitshiftBalanced)
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{
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case 0: gain = 0.5; break;
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case 1: gain = 1.0; break;
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case 2: gain = 2.0; break;
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case 3: gain = 4.0; break;
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case 4: gain = 8.0; break;
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case 5: gain = 16.0; break;
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case 6: gain = 32.0; break;
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case 7: gain = 64.0; break;
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case 8: gain = 128.0; break;
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}
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//we are directly punching in the gain values rather than calculating them
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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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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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double side = inputSampleL - inputSampleR;
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//tip is left, to add negative ring (right) to combine 'em is the same as subtracting them
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//end result is, mono output is made up of half of each balanced input combined. Note that we don't just
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//flip the ring input, because we need to combine them to cancel out interference.
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inputSampleL = side*gain;
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inputSampleR = side*gain;
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//assign mono as result of balancing of channels
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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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