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airwindows/plugins/MacVST/Distance3/source/Distance3Proc.cpp

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/* ========================================
* Distance3 - Distance3.h
* Copyright (c) airwindows, Airwindows uses the MIT license
* ======================================== */
#ifndef __Distance3_H
#include "Distance3.h"
#endif
void Distance3::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
{
float* in1 = inputs[0];
float* in2 = inputs[1];
float* out1 = outputs[0];
float* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double softslew = (A*100.0)+0.5;
softslew *= overallscale;
double outslew = softslew * (1.0-(A*0.333));
double refdB = (B*70.0)+70.0;
double topdB = 0.000000075 * pow(10.0,refdB/20.0) * overallscale;
double wet = C;
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
inputSampleL *= softslew;
lastclampAL = clampAL; clampAL = inputSampleL - lastAL;
double postfilter = changeAL = fabs(clampAL - lastclampAL);
postfilter += (softslew / 2.0);
inputSampleL /= outslew;
inputSampleL += (prevresultAL * postfilter);
inputSampleL /= (postfilter + 1.0);
prevresultAL = inputSampleL;
//do an IIR like thing to further squish superdistant stuff
inputSampleL *= topdB;
if (inputSampleL < -0.222) inputSampleL = -0.222; if (inputSampleL > 0.222) inputSampleL = 0.222;
//Air Discontinuity A begin
dBaL[dBaXL] = inputSampleL; dBaPosL *= 0.5; dBaPosL += fabs((inputSampleL*((inputSampleL*0.25)-0.5))*0.5);
int dBdly = floor(dBaPosL*dscBuf);
double dBi = (dBaPosL*dscBuf)-dBdly;
inputSampleL = dBaL[dBaXL-dBdly +((dBaXL-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleL += dBaL[dBaXL-dBdly +((dBaXL-dBdly < 0)?dscBuf:0)]*dBi;
dBaXL++; if (dBaXL < 0 || dBaXL >= dscBuf) dBaXL = 0;
//Air Discontinuity A end
inputSampleL /= topdB;
inputSampleL *= softslew;
lastclampBL = clampBL; clampBL = inputSampleL - lastBL;
postfilter = changeBL = fabs(clampBL - lastclampBL);
postfilter += (softslew / 2.0);
lastBL = inputSampleL;
inputSampleL /= outslew;
inputSampleL += (prevresultBL * postfilter);
inputSampleL /= (postfilter + 1.0);
prevresultBL = inputSampleL;
//do an IIR like thing to further squish superdistant stuff
inputSampleL *= topdB;
if (inputSampleL < -0.222) inputSampleL = -0.222; if (inputSampleL > 0.222) inputSampleL = 0.222;
//Air Discontinuity B begin
dBbL[dBbXL] = inputSampleL; dBbPosL *= 0.5; dBbPosL += fabs((inputSampleL*((inputSampleL*0.25)-0.5))*0.5);
dBdly = floor(dBbPosL*dscBuf); dBi = (dBbPosL*dscBuf)-dBdly;
inputSampleL = dBbL[dBbXL-dBdly +((dBbXL-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleL += dBbL[dBbXL-dBdly +((dBbXL-dBdly < 0)?dscBuf:0)]*dBi;
dBbXL++; if (dBbXL < 0 || dBbXL >= dscBuf) dBbXL = 0;
//Air Discontinuity B end
inputSampleL /= topdB;
inputSampleL *= softslew;
lastclampCL = clampCL; clampCL = inputSampleL - lastCL;
postfilter = changeCL = fabs(clampCL - lastclampCL);
postfilter += (softslew / 2.0);
lastCL = inputSampleL;
inputSampleL /= softslew; //don't boost the final time!
inputSampleL += (prevresultCL * postfilter);
inputSampleL /= (postfilter + 1.0);
prevresultCL = inputSampleL;
//do an IIR like thing to further squish superdistant stuff
inputSampleL *= topdB;
if (inputSampleL < -0.222) inputSampleL = -0.222; if (inputSampleL > 0.222) inputSampleL = 0.222;
//Air Discontinuity C begin
dBcL[dBcXL] = inputSampleL; dBcPosL *= 0.5; dBcPosL += fabs((inputSampleL*((inputSampleL*0.25)-0.5))*0.5);
dBdly = floor(dBcPosL*dscBuf); dBi = (dBcPosL*dscBuf)-dBdly;
inputSampleL = dBcL[dBcXL-dBdly +((dBcXL-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleL += dBcL[dBcXL-dBdly +((dBcXL-dBdly < 0)?dscBuf:0)]*dBi;
dBcXL++; if (dBcXL < 0 || dBcXL >= dscBuf) dBcXL = 0;
//Air Discontinuity C end
inputSampleL /= topdB;
if (wet < 1.0) inputSampleL = (drySampleL * (1.0-wet))+(inputSampleL*wet);
inputSampleR *= softslew;
lastclampAR = clampAR; clampAR = inputSampleR - lastAR;
postfilter = changeAR = fabs(clampAR - lastclampAR);
postfilter += (softslew / 2.0);
inputSampleR /= outslew;
inputSampleR += (prevresultAR * postfilter);
inputSampleR /= (postfilter + 1.0);
prevresultAR = inputSampleR;
//do an IIR like thing to further squish superdistant stuff
inputSampleR *= topdB;
if (inputSampleR < -0.222) inputSampleR = -0.222; if (inputSampleR > 0.222) inputSampleR = 0.222;
//Air Discontinuity A begin
dBaR[dBaXR] = inputSampleR; dBaPosR *= 0.5; dBaPosR += fabs((inputSampleR*((inputSampleR*0.25)-0.5))*0.5);
dBdly = floor(dBaPosR*dscBuf);
dBi = (dBaPosR*dscBuf)-dBdly;
inputSampleR = dBaR[dBaXR-dBdly +((dBaXR-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleR += dBaR[dBaXR-dBdly +((dBaXR-dBdly < 0)?dscBuf:0)]*dBi;
dBaXR++; if (dBaXR < 0 || dBaXR >= dscBuf) dBaXR = 0;
//Air Discontinuity A end
inputSampleR /= topdB;
inputSampleR *= softslew;
lastclampBR = clampBR; clampBR = inputSampleR - lastBR;
postfilter = changeBR = fabs(clampBR - lastclampBR);
postfilter += (softslew / 2.0);
lastBR = inputSampleR;
inputSampleR /= outslew;
inputSampleR += (prevresultBR * postfilter);
inputSampleR /= (postfilter + 1.0);
prevresultBR = inputSampleR;
//do an IIR like thing to further squish superdistant stuff
inputSampleR *= topdB;
if (inputSampleR < -0.222) inputSampleR = -0.222; if (inputSampleR > 0.222) inputSampleR = 0.222;
//Air Discontinuity B begin
dBbR[dBbXR] = inputSampleR; dBbPosR *= 0.5; dBbPosR += fabs((inputSampleR*((inputSampleR*0.25)-0.5))*0.5);
dBdly = floor(dBbPosR*dscBuf); dBi = (dBbPosR*dscBuf)-dBdly;
inputSampleR = dBbR[dBbXR-dBdly +((dBbXR-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleR += dBbR[dBbXR-dBdly +((dBbXR-dBdly < 0)?dscBuf:0)]*dBi;
dBbXR++; if (dBbXR < 0 || dBbXR >= dscBuf) dBbXR = 0;
//Air Discontinuity B end
inputSampleR /= topdB;
inputSampleR *= softslew;
lastclampCR = clampCR; clampCR = inputSampleR - lastCR;
postfilter = changeCR = fabs(clampCR - lastclampCR);
postfilter += (softslew / 2.0);
lastCR = inputSampleR;
inputSampleR /= softslew; //don't boost the final time!
inputSampleR += (prevresultCR * postfilter);
inputSampleR /= (postfilter + 1.0);
prevresultCR = inputSampleR;
//do an IIR like thing to further squish superdistant stuff
inputSampleR *= topdB;
if (inputSampleR < -0.222) inputSampleR = -0.222; if (inputSampleR > 0.222) inputSampleR = 0.222;
//Air Discontinuity C begin
dBcR[dBcXR] = inputSampleR; dBcPosR *= 0.5; dBcPosR += fabs((inputSampleR*((inputSampleR*0.25)-0.5))*0.5);
dBdly = floor(dBcPosR*dscBuf); dBi = (dBcPosR*dscBuf)-dBdly;
inputSampleR = dBcR[dBcXR-dBdly +((dBcXR-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleR += dBcR[dBcXR-dBdly +((dBcXR-dBdly < 0)?dscBuf:0)]*dBi;
dBcXR++; if (dBcXR < 0 || dBcXR >= dscBuf) dBcXR = 0;
//Air Discontinuity C end
inputSampleR /= topdB;
if (wet < 1.0) inputSampleR = (drySampleR * (1.0-wet))+(inputSampleR*wet);
//begin 32 bit stereo floating point dither
int expon; frexpf((float)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
frexpf((float)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
//end 32 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
in1++;
in2++;
out1++;
out2++;
}
}
void Distance3::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
{
double* in1 = inputs[0];
double* in2 = inputs[1];
double* out1 = outputs[0];
double* out2 = outputs[1];
double overallscale = 1.0;
overallscale /= 44100.0;
overallscale *= getSampleRate();
double softslew = (A*100.0)+0.5;
softslew *= overallscale;
double outslew = softslew * (1.0-(A*0.333));
double refdB = (B*70.0)+70.0;
double topdB = 0.000000075 * pow(10.0,refdB/20.0) * overallscale;
double wet = C;
while (--sampleFrames >= 0)
{
double inputSampleL = *in1;
double inputSampleR = *in2;
if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
double drySampleL = inputSampleL;
double drySampleR = inputSampleR;
inputSampleL *= softslew;
lastclampAL = clampAL; clampAL = inputSampleL - lastAL;
double postfilter = changeAL = fabs(clampAL - lastclampAL);
postfilter += (softslew / 2.0);
inputSampleL /= outslew;
inputSampleL += (prevresultAL * postfilter);
inputSampleL /= (postfilter + 1.0);
prevresultAL = inputSampleL;
//do an IIR like thing to further squish superdistant stuff
inputSampleL *= topdB;
if (inputSampleL < -0.222) inputSampleL = -0.222; if (inputSampleL > 0.222) inputSampleL = 0.222;
//Air Discontinuity A begin
dBaL[dBaXL] = inputSampleL; dBaPosL *= 0.5; dBaPosL += fabs((inputSampleL*((inputSampleL*0.25)-0.5))*0.5);
int dBdly = floor(dBaPosL*dscBuf);
double dBi = (dBaPosL*dscBuf)-dBdly;
inputSampleL = dBaL[dBaXL-dBdly +((dBaXL-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleL += dBaL[dBaXL-dBdly +((dBaXL-dBdly < 0)?dscBuf:0)]*dBi;
dBaXL++; if (dBaXL < 0 || dBaXL >= dscBuf) dBaXL = 0;
//Air Discontinuity A end
inputSampleL /= topdB;
inputSampleL *= softslew;
lastclampBL = clampBL; clampBL = inputSampleL - lastBL;
postfilter = changeBL = fabs(clampBL - lastclampBL);
postfilter += (softslew / 2.0);
lastBL = inputSampleL;
inputSampleL /= outslew;
inputSampleL += (prevresultBL * postfilter);
inputSampleL /= (postfilter + 1.0);
prevresultBL = inputSampleL;
//do an IIR like thing to further squish superdistant stuff
inputSampleL *= topdB;
if (inputSampleL < -0.222) inputSampleL = -0.222; if (inputSampleL > 0.222) inputSampleL = 0.222;
//Air Discontinuity B begin
dBbL[dBbXL] = inputSampleL; dBbPosL *= 0.5; dBbPosL += fabs((inputSampleL*((inputSampleL*0.25)-0.5))*0.5);
dBdly = floor(dBbPosL*dscBuf); dBi = (dBbPosL*dscBuf)-dBdly;
inputSampleL = dBbL[dBbXL-dBdly +((dBbXL-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleL += dBbL[dBbXL-dBdly +((dBbXL-dBdly < 0)?dscBuf:0)]*dBi;
dBbXL++; if (dBbXL < 0 || dBbXL >= dscBuf) dBbXL = 0;
//Air Discontinuity B end
inputSampleL /= topdB;
inputSampleL *= softslew;
lastclampCL = clampCL; clampCL = inputSampleL - lastCL;
postfilter = changeCL = fabs(clampCL - lastclampCL);
postfilter += (softslew / 2.0);
lastCL = inputSampleL;
inputSampleL /= softslew; //don't boost the final time!
inputSampleL += (prevresultCL * postfilter);
inputSampleL /= (postfilter + 1.0);
prevresultCL = inputSampleL;
//do an IIR like thing to further squish superdistant stuff
inputSampleL *= topdB;
if (inputSampleL < -0.222) inputSampleL = -0.222; if (inputSampleL > 0.222) inputSampleL = 0.222;
//Air Discontinuity C begin
dBcL[dBcXL] = inputSampleL; dBcPosL *= 0.5; dBcPosL += fabs((inputSampleL*((inputSampleL*0.25)-0.5))*0.5);
dBdly = floor(dBcPosL*dscBuf); dBi = (dBcPosL*dscBuf)-dBdly;
inputSampleL = dBcL[dBcXL-dBdly +((dBcXL-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleL += dBcL[dBcXL-dBdly +((dBcXL-dBdly < 0)?dscBuf:0)]*dBi;
dBcXL++; if (dBcXL < 0 || dBcXL >= dscBuf) dBcXL = 0;
//Air Discontinuity C end
inputSampleL /= topdB;
if (wet < 1.0) inputSampleL = (drySampleL * (1.0-wet))+(inputSampleL*wet);
inputSampleR *= softslew;
lastclampAR = clampAR; clampAR = inputSampleR - lastAR;
postfilter = changeAR = fabs(clampAR - lastclampAR);
postfilter += (softslew / 2.0);
inputSampleR /= outslew;
inputSampleR += (prevresultAR * postfilter);
inputSampleR /= (postfilter + 1.0);
prevresultAR = inputSampleR;
//do an IIR like thing to further squish superdistant stuff
inputSampleR *= topdB;
if (inputSampleR < -0.222) inputSampleR = -0.222; if (inputSampleR > 0.222) inputSampleR = 0.222;
//Air Discontinuity A begin
dBaR[dBaXR] = inputSampleR; dBaPosR *= 0.5; dBaPosR += fabs((inputSampleR*((inputSampleR*0.25)-0.5))*0.5);
dBdly = floor(dBaPosR*dscBuf);
dBi = (dBaPosR*dscBuf)-dBdly;
inputSampleR = dBaR[dBaXR-dBdly +((dBaXR-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleR += dBaR[dBaXR-dBdly +((dBaXR-dBdly < 0)?dscBuf:0)]*dBi;
dBaXR++; if (dBaXR < 0 || dBaXR >= dscBuf) dBaXR = 0;
//Air Discontinuity A end
inputSampleR /= topdB;
inputSampleR *= softslew;
lastclampBR = clampBR; clampBR = inputSampleR - lastBR;
postfilter = changeBR = fabs(clampBR - lastclampBR);
postfilter += (softslew / 2.0);
lastBR = inputSampleR;
inputSampleR /= outslew;
inputSampleR += (prevresultBR * postfilter);
inputSampleR /= (postfilter + 1.0);
prevresultBR = inputSampleR;
//do an IIR like thing to further squish superdistant stuff
inputSampleR *= topdB;
if (inputSampleR < -0.222) inputSampleR = -0.222; if (inputSampleR > 0.222) inputSampleR = 0.222;
//Air Discontinuity B begin
dBbR[dBbXR] = inputSampleR; dBbPosR *= 0.5; dBbPosR += fabs((inputSampleR*((inputSampleR*0.25)-0.5))*0.5);
dBdly = floor(dBbPosR*dscBuf); dBi = (dBbPosR*dscBuf)-dBdly;
inputSampleR = dBbR[dBbXR-dBdly +((dBbXR-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleR += dBbR[dBbXR-dBdly +((dBbXR-dBdly < 0)?dscBuf:0)]*dBi;
dBbXR++; if (dBbXR < 0 || dBbXR >= dscBuf) dBbXR = 0;
//Air Discontinuity B end
inputSampleR /= topdB;
inputSampleR *= softslew;
lastclampCR = clampCR; clampCR = inputSampleR - lastCR;
postfilter = changeCR = fabs(clampCR - lastclampCR);
postfilter += (softslew / 2.0);
lastCR = inputSampleR;
inputSampleR /= softslew; //don't boost the final time!
inputSampleR += (prevresultCR * postfilter);
inputSampleR /= (postfilter + 1.0);
prevresultCR = inputSampleR;
//do an IIR like thing to further squish superdistant stuff
inputSampleR *= topdB;
if (inputSampleR < -0.222) inputSampleR = -0.222; if (inputSampleR > 0.222) inputSampleR = 0.222;
//Air Discontinuity C begin
dBcR[dBcXR] = inputSampleR; dBcPosR *= 0.5; dBcPosR += fabs((inputSampleR*((inputSampleR*0.25)-0.5))*0.5);
dBdly = floor(dBcPosR*dscBuf); dBi = (dBcPosR*dscBuf)-dBdly;
inputSampleR = dBcR[dBcXR-dBdly +((dBcXR-dBdly < 0)?dscBuf:0)]*(1.0-dBi);
dBdly++; inputSampleR += dBcR[dBcXR-dBdly +((dBcXR-dBdly < 0)?dscBuf:0)]*dBi;
dBcXR++; if (dBcXR < 0 || dBcXR >= dscBuf) dBcXR = 0;
//Air Discontinuity C end
inputSampleR /= topdB;
if (wet < 1.0) inputSampleR = (drySampleR * (1.0-wet))+(inputSampleR*wet);
//begin 64 bit stereo floating point dither
//int expon; frexp((double)inputSampleL, &expon);
fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//frexp((double)inputSampleR, &expon);
fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
//end 64 bit stereo floating point dither
*out1 = inputSampleL;
*out2 = inputSampleR;
in1++;
in2++;
out1++;
out2++;
}
}
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