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184 lines
7 KiB
C++
Executable file
184 lines
7 KiB
C++
Executable file
/* ========================================
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* Cabs2 - Cabs2.h
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* Copyright (c) airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Cabs2_H
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#include "Cabs2.h"
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#endif
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void Cabs2::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 lFreq = pow(fmax(A,0.002),overallscale); //the lowpass
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double hFreq = pow(B,overallscale+2.0); //the highpass
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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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if (hFreq > 0.0) {
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double lowSampleL = inputSampleL;
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double lowSampleR = inputSampleR;
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for(int count = 0; count < 21; count++) {
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iirHAngleL[count] = (iirHAngleL[count]*(1.0-hFreq))+((lowSampleL-iirHPositionL[count])*hFreq);
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lowSampleL = ((iirHPositionL[count]+(iirHAngleL[count]*hFreq))*(1.0-hFreq))+(lowSampleL*hFreq);
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iirHPositionL[count] = ((iirHPositionL[count]+(iirHAngleL[count]*hFreq))*(1.0-hFreq))+(lowSampleL*hFreq);
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inputSampleL -= (lowSampleL * (1.0/21.0));//left
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iirHAngleR[count] = (iirHAngleR[count]*(1.0-hFreq))+((lowSampleR-iirHPositionR[count])*hFreq);
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lowSampleR = ((iirHPositionR[count]+(iirHAngleR[count]*hFreq))*(1.0-hFreq))+(lowSampleR*hFreq);
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iirHPositionR[count] = ((iirHPositionR[count]+(iirHAngleR[count]*hFreq))*(1.0-hFreq))+(lowSampleR*hFreq);
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inputSampleR -= (lowSampleR * (1.0/21.0));//right
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} //the highpass
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hBypass = false;
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} else {
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if (!hBypass) {
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hBypass = true;
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for(int count = 0; count < 22; count++) {
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iirHPositionL[count] = 0.0;
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iirHAngleL[count] = 0.0;
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iirHPositionR[count] = 0.0;
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iirHAngleR[count] = 0.0;
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}
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} //blank out highpass if jut switched off
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}
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if (lFreq < 1.0) {
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for(int count = 0; count < 13; count++) {
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iirLAngleL[count] = (iirLAngleL[count]*(1.0-lFreq))+((inputSampleL-iirLPositionL[count])*lFreq);
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inputSampleL = ((iirLPositionL[count]+(iirLAngleL[count]*lFreq))*(1.0-lFreq))+(inputSampleL*lFreq);
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iirLPositionL[count] = ((iirLPositionL[count]+(iirLAngleL[count]*lFreq))*(1.0-lFreq))+(inputSampleL*lFreq);//left
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iirLAngleR[count] = (iirLAngleR[count]*(1.0-lFreq))+((inputSampleR-iirLPositionR[count])*lFreq);
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inputSampleR = ((iirLPositionR[count]+(iirLAngleR[count]*lFreq))*(1.0-lFreq))+(inputSampleR*lFreq);
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iirLPositionR[count] = ((iirLPositionR[count]+(iirLAngleR[count]*lFreq))*(1.0-lFreq))+(inputSampleR*lFreq);//right
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} //the lowpass
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lBypass = false;
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} else {
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if (!lBypass) {
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lBypass = true;
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for(int count = 0; count < 14; count++) {
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iirLPositionL[count] = 0.0;
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iirLAngleL[count] = 0.0;
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iirLPositionR[count] = 0.0;
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iirLAngleR[count] = 0.0;
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}
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} //blank out lowpass if just switched off
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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 Cabs2::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 lFreq = pow(fmax(A,0.002),overallscale); //the lowpass
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double hFreq = pow(B,overallscale+2.0); //the highpass
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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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if (hFreq > 0.0) {
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double lowSampleL = inputSampleL;
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double lowSampleR = inputSampleR;
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for(int count = 0; count < 21; count++) {
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iirHAngleL[count] = (iirHAngleL[count]*(1.0-hFreq))+((lowSampleL-iirHPositionL[count])*hFreq);
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lowSampleL = ((iirHPositionL[count]+(iirHAngleL[count]*hFreq))*(1.0-hFreq))+(lowSampleL*hFreq);
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iirHPositionL[count] = ((iirHPositionL[count]+(iirHAngleL[count]*hFreq))*(1.0-hFreq))+(lowSampleL*hFreq);
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inputSampleL -= (lowSampleL * (1.0/21.0));//left
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iirHAngleR[count] = (iirHAngleR[count]*(1.0-hFreq))+((lowSampleR-iirHPositionR[count])*hFreq);
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lowSampleR = ((iirHPositionR[count]+(iirHAngleR[count]*hFreq))*(1.0-hFreq))+(lowSampleR*hFreq);
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iirHPositionR[count] = ((iirHPositionR[count]+(iirHAngleR[count]*hFreq))*(1.0-hFreq))+(lowSampleR*hFreq);
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inputSampleR -= (lowSampleR * (1.0/21.0));//right
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} //the highpass
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hBypass = false;
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} else {
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if (!hBypass) {
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hBypass = true;
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for(int count = 0; count < 22; count++) {
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iirHPositionL[count] = 0.0;
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iirHAngleL[count] = 0.0;
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iirHPositionR[count] = 0.0;
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iirHAngleR[count] = 0.0;
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}
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} //blank out highpass if jut switched off
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}
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if (lFreq < 1.0) {
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for(int count = 0; count < 13; count++) {
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iirLAngleL[count] = (iirLAngleL[count]*(1.0-lFreq))+((inputSampleL-iirLPositionL[count])*lFreq);
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inputSampleL = ((iirLPositionL[count]+(iirLAngleL[count]*lFreq))*(1.0-lFreq))+(inputSampleL*lFreq);
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iirLPositionL[count] = ((iirLPositionL[count]+(iirLAngleL[count]*lFreq))*(1.0-lFreq))+(inputSampleL*lFreq);//left
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iirLAngleR[count] = (iirLAngleR[count]*(1.0-lFreq))+((inputSampleR-iirLPositionR[count])*lFreq);
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inputSampleR = ((iirLPositionR[count]+(iirLAngleR[count]*lFreq))*(1.0-lFreq))+(inputSampleR*lFreq);
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iirLPositionR[count] = ((iirLPositionR[count]+(iirLAngleR[count]*lFreq))*(1.0-lFreq))+(inputSampleR*lFreq);//right
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} //the lowpass
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lBypass = false;
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} else {
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if (!lBypass) {
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lBypass = true;
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for(int count = 0; count < 14; count++) {
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iirLPositionL[count] = 0.0;
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iirLAngleL[count] = 0.0;
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iirLPositionR[count] = 0.0;
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iirLAngleR[count] = 0.0;
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}
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} //blank out lowpass if just switched off
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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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