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230 lines
No EOL
7.8 KiB
C++
Executable file
230 lines
No EOL
7.8 KiB
C++
Executable file
/* ========================================
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* StereoFX - StereoFX.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __StereoFX_H
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#include "StereoFX.h"
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#endif
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void StereoFX::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 inputSampleL;
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double inputSampleR;
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double mid;
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double side;
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//High Impact section
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double stereowide = A;
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double centersquish = C;
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double density = stereowide * 2.4;
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double sustain = 1.0 - (1.0/(1.0 + (density/7.0)));
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//this way, enhance increases up to 50% and then mid falls off beyond that
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double bridgerectifier;
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double count;
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//Highpass section
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double iirAmount = pow(B,3)/overallscale;
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double tight = -0.33333333333333;
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double offset;
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//we are setting it up so that to either extreme we can get an audible sound,
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//but sort of scaled so small adjustments don't shift the cutoff frequency yet.
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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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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//assign working variables
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mid = inputSampleL + inputSampleR;
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side = inputSampleL - inputSampleR;
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//assign mid and side. Now, High Impact code
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count = density;
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while (count > 1.0)
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{
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bridgerectifier = fabs(side)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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bridgerectifier = sin(bridgerectifier);
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if (side > 0.0) side = bridgerectifier;
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else side = -bridgerectifier;
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count = count - 1.0;
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}
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//we have now accounted for any really high density settings.
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bridgerectifier = fabs(side)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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bridgerectifier = sin(bridgerectifier);
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if (side > 0) side = (side*(1-count))+(bridgerectifier*count);
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else side = (side*(1-count))-(bridgerectifier*count);
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//blend according to density control
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//done first density. Next, sustain-reducer
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bridgerectifier = fabs(side)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = (1-cos(bridgerectifier))*3.141592653589793;
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if (side > 0) side = (side*(1-sustain))+(bridgerectifier*sustain);
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else side = (side*(1-sustain))-(bridgerectifier*sustain);
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//done with High Impact code
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//now, Highpass code
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offset = 0.666666666666666 + ((1-fabs(side))*tight);
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if (offset < 0) offset = 0;
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if (offset > 1) offset = 1;
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if (flip)
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{
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iirSampleA = (iirSampleA * (1 - (offset * iirAmount))) + (side * (offset * iirAmount));
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side = side - iirSampleA;
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}
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else
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{
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iirSampleB = (iirSampleB * (1 - (offset * iirAmount))) + (side * (offset * iirAmount));
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side = side - iirSampleB;
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}
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//done with Highpass code
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bridgerectifier = fabs(mid)/1.273239544735162;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier)*1.273239544735162;
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if (mid > 0) mid = (mid*(1-centersquish))+(bridgerectifier*centersquish);
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else mid = (mid*(1-centersquish))-(bridgerectifier*centersquish);
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//done with the mid saturating section.
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inputSampleL = (mid+side)/2.0;
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inputSampleR = (mid-side)/2.0;
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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 StereoFX::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 inputSampleL;
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double inputSampleR;
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double mid;
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double side;
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//High Impact section
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double stereowide = A;
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double centersquish = C;
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double density = stereowide * 2.4;
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double sustain = 1.0 - (1.0/(1.0 + (density/7.0)));
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//this way, enhance increases up to 50% and then mid falls off beyond that
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double bridgerectifier;
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double count;
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//Highpass section
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double iirAmount = pow(B,3)/overallscale;
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double tight = -0.33333333333333;
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double offset;
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//we are setting it up so that to either extreme we can get an audible sound,
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//but sort of scaled so small adjustments don't shift the cutoff frequency yet.
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while (--sampleFrames >= 0)
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{
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inputSampleL = *in1;
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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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//assign working variables
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mid = inputSampleL + inputSampleR;
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side = inputSampleL - inputSampleR;
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//assign mid and side. Now, High Impact code
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count = density;
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while (count > 1.0)
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{
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bridgerectifier = fabs(side)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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bridgerectifier = sin(bridgerectifier);
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if (side > 0.0) side = bridgerectifier;
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else side = -bridgerectifier;
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count = count - 1.0;
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}
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//we have now accounted for any really high density settings.
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bridgerectifier = fabs(side)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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//max value for sine function
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bridgerectifier = sin(bridgerectifier);
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if (side > 0) side = (side*(1-count))+(bridgerectifier*count);
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else side = (side*(1-count))-(bridgerectifier*count);
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//blend according to density control
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//done first density. Next, sustain-reducer
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bridgerectifier = fabs(side)*1.57079633;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = (1-cos(bridgerectifier))*3.141592653589793;
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if (side > 0) side = (side*(1-sustain))+(bridgerectifier*sustain);
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else side = (side*(1-sustain))-(bridgerectifier*sustain);
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//done with High Impact code
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//now, Highpass code
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offset = 0.666666666666666 + ((1-fabs(side))*tight);
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if (offset < 0) offset = 0;
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if (offset > 1) offset = 1;
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if (flip)
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{
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iirSampleA = (iirSampleA * (1 - (offset * iirAmount))) + (side * (offset * iirAmount));
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side = side - iirSampleA;
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}
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else
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{
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iirSampleB = (iirSampleB * (1 - (offset * iirAmount))) + (side * (offset * iirAmount));
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side = side - iirSampleB;
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}
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//done with Highpass code
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bridgerectifier = fabs(mid)/1.273239544735162;
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if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633;
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bridgerectifier = sin(bridgerectifier)*1.273239544735162;
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if (mid > 0) mid = (mid*(1-centersquish))+(bridgerectifier*centersquish);
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else mid = (mid*(1-centersquish))-(bridgerectifier*centersquish);
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//done with the mid saturating section.
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inputSampleL = (mid+side)/2.0;
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inputSampleR = (mid-side)/2.0;
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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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} |