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https://github.com/airwindows/airwindows.git
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228 lines
8.2 KiB
C++
Executable file
228 lines
8.2 KiB
C++
Executable file
/* ========================================
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* Dubly3 - Dubly3.h
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* Copyright (c) airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __Dubly3_H
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#include "Dubly3.h"
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#endif
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void Dubly3::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 inputGain = pow(A*2.0,2.0);
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double dublyAmount = B*2.0;
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double outlyAmount = (1.0-B)*-2.0;
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if (outlyAmount < -1.0) outlyAmount = -1.0;
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double iirEncFreq = (1.0-C)/overallscale;
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double iirDecFreq = C/overallscale;
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double outputGain = D*2.0;
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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 (inputGain != 1.0) {
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inputSampleL *= inputGain;
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inputSampleR *= inputGain;
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}
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//Dubly encode
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iirEncL = (iirEncL * (1.0 - iirEncFreq)) + (inputSampleL * iirEncFreq);
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double highPart = ((inputSampleL-iirEncL)*2.848);
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highPart += avgEncL; avgEncL = (inputSampleL-iirEncL)*1.152;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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double dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compEncL = (compEncL*(1.0-iirEncFreq))+(dubly*iirEncFreq);
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inputSampleL += ((highPart*compEncL)*dublyAmount);
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} //end Dubly encode L
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iirEncR = (iirEncR * (1.0 - iirEncFreq)) + (inputSampleR * iirEncFreq);
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highPart = ((inputSampleR-iirEncR)*2.848);
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highPart += avgEncR; avgEncR = (inputSampleR-iirEncR)*1.152;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compEncR = (compEncR*(1.0-iirEncFreq))+(dubly*iirEncFreq);
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inputSampleR += ((highPart*compEncR)*dublyAmount);
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} //end Dubly encode R
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if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
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if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
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inputSampleL = sin(inputSampleL);
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if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
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if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
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inputSampleR = sin(inputSampleR);
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//Dubly decode
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iirDecL = (iirDecL * (1.0 - iirDecFreq)) + (inputSampleL * iirDecFreq);
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highPart = ((inputSampleL-iirDecL)*2.628);
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highPart += avgDecL; avgDecL = (inputSampleL-iirDecL)*1.372;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compDecL = (compDecL*(1.0-iirDecFreq))+(dubly*iirDecFreq);
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inputSampleL += ((highPart*compDecL)*outlyAmount);
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} //end Dubly decode L
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iirDecR = (iirDecR * (1.0 - iirDecFreq)) + (inputSampleR * iirDecFreq);
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highPart = ((inputSampleR-iirDecR)*2.628);
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highPart += avgDecR; avgDecR = (inputSampleR-iirDecR)*1.372;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compDecR = (compDecR*(1.0-iirDecFreq))+(dubly*iirDecFreq);
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inputSampleR += ((highPart*compDecR)*outlyAmount);
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} //end Dubly decode R
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if (outputGain != 1.0) {
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inputSampleL *= outputGain;
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inputSampleR *= outputGain;
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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 Dubly3::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 inputGain = pow(A*2.0,2.0);
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double dublyAmount = B*2.0;
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double outlyAmount = (1.0-B)*-2.0;
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if (outlyAmount < -1.0) outlyAmount = -1.0;
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double iirEncFreq = (1.0-C)/overallscale;
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double iirDecFreq = C/overallscale;
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double outputGain = D*2.0;
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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 (inputGain != 1.0) {
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inputSampleL *= inputGain;
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inputSampleR *= inputGain;
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}
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//Dubly encode
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iirEncL = (iirEncL * (1.0 - iirEncFreq)) + (inputSampleL * iirEncFreq);
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double highPart = ((inputSampleL-iirEncL)*2.848);
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highPart += avgEncL; avgEncL = (inputSampleL-iirEncL)*1.152;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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double dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compEncL = (compEncL*(1.0-iirEncFreq))+(dubly*iirEncFreq);
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inputSampleL += ((highPart*compEncL)*dublyAmount);
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} //end Dubly encode L
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iirEncR = (iirEncR * (1.0 - iirEncFreq)) + (inputSampleR * iirEncFreq);
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highPart = ((inputSampleR-iirEncR)*2.848);
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highPart += avgEncR; avgEncR = (inputSampleR-iirEncR)*1.152;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compEncR = (compEncR*(1.0-iirEncFreq))+(dubly*iirEncFreq);
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inputSampleR += ((highPart*compEncR)*dublyAmount);
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} //end Dubly encode R
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if (inputSampleL > 1.57079633) inputSampleL = 1.57079633;
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if (inputSampleL < -1.57079633) inputSampleL = -1.57079633;
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inputSampleL = sin(inputSampleL);
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if (inputSampleR > 1.57079633) inputSampleR = 1.57079633;
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if (inputSampleR < -1.57079633) inputSampleR = -1.57079633;
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inputSampleR = sin(inputSampleR);
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//Dubly decode
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iirDecL = (iirDecL * (1.0 - iirDecFreq)) + (inputSampleL * iirDecFreq);
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highPart = ((inputSampleL-iirDecL)*2.628);
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highPart += avgDecL; avgDecL = (inputSampleL-iirDecL)*1.372;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compDecL = (compDecL*(1.0-iirDecFreq))+(dubly*iirDecFreq);
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inputSampleL += ((highPart*compDecL)*outlyAmount);
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} //end Dubly decode L
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iirDecR = (iirDecR * (1.0 - iirDecFreq)) + (inputSampleR * iirDecFreq);
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highPart = ((inputSampleR-iirDecR)*2.628);
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highPart += avgDecR; avgDecR = (inputSampleR-iirDecR)*1.372;
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if (highPart > 1.0) highPart = 1.0; if (highPart < -1.0) highPart = -1.0;
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dubly = fabs(highPart);
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if (dubly > 0.0) {
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double adjust = log(1.0+(255.0*dubly))/2.40823996531;
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if (adjust > 0.0) dubly /= adjust;
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compDecR = (compDecR*(1.0-iirDecFreq))+(dubly*iirDecFreq);
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inputSampleR += ((highPart*compDecR)*outlyAmount);
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} //end Dubly decode R
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if (outputGain != 1.0) {
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inputSampleL *= outputGain;
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inputSampleR *= outputGain;
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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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