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124 lines
4.4 KiB
C++
Executable file
124 lines
4.4 KiB
C++
Executable file
/* ========================================
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* PurestDualPan - PurestDualPan.h
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* Copyright (c) airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __PurestDualPan_H
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#include "PurestDualPan.h"
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#endif
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void PurestDualPan::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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VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
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gainLA = gainLB; gainLB = A;
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panLA = panLB; panLB = B;
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gainRA = gainRB; gainRB = C;
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panRA = panRB; panRB = D;
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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 (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 temp = (double)sampleFrames/inFramesToProcess;
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long double LpanR = ((panLA*temp) + (panLB*(1.0-temp)))*1.57079633;
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long double LpanL = 1.57079633 - LpanR;
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LpanR = sin(LpanR); LpanL = sin(LpanL);
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long double gainL = ((gainLA*temp) + (gainLB*(1.0-temp)))*2.0;
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gainL = pow(gainL,gainL + 0.618033988749894848204586);
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long double RpanR = ((panRA*temp) + (panRB*(1.0-temp)))*1.57079633;
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long double RpanL = 1.57079633 - RpanR;
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RpanR = sin(RpanR); RpanL = sin(RpanL);
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long double gainR = ((gainRA*temp) + (gainRB*(1.0-temp)))*2.0;
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gainR = pow(gainR,gainR + 0.618033988749894848204586);
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long double LoutL = LpanL*gainL*inputSampleL;
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long double LoutR = LpanR*gainL*inputSampleL;
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long double RoutL = RpanL*gainR*inputSampleR;
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long double RoutR = RpanR*gainR*inputSampleR;
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inputSampleL = LoutL + RoutL;
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inputSampleR = LoutR + RoutR;
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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 PurestDualPan::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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VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
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gainLA = gainLB; gainLB = A;
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panLA = panLB; panLB = B;
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gainRA = gainRB; gainRB = C;
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panRA = panRB; panRB = D;
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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 (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 temp = (double)sampleFrames/inFramesToProcess;
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long double LpanR = ((panLA*temp) + (panLB*(1.0-temp)))*1.57079633;
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long double LpanL = 1.57079633 - LpanR;
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LpanR = sin(LpanR); LpanL = sin(LpanL);
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long double gainL = ((gainLA*temp) + (gainLB*(1.0-temp)))*2.0;
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gainL = pow(gainL,gainL + 0.618033988749894848204586);
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long double RpanR = ((panRA*temp) + (panRB*(1.0-temp)))*1.57079633;
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long double RpanL = 1.57079633 - RpanR;
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RpanR = sin(RpanR); RpanL = sin(RpanL);
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long double gainR = ((gainRA*temp) + (gainRB*(1.0-temp)))*2.0;
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gainR = pow(gainR,gainR + 0.618033988749894848204586);
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long double LoutL = LpanL*gainL*inputSampleL;
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long double LoutR = LpanR*gainL*inputSampleL;
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long double RoutL = RpanL*gainR*inputSampleR;
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long double RoutR = RpanR*gainR*inputSampleR;
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inputSampleL = LoutL + RoutL;
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inputSampleR = LoutR + RoutR;
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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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