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Diffstat (limited to 'plugins/WinVST/StereoFX/StereoFXProc.cpp')
| -rwxr-xr-x | plugins/WinVST/StereoFX/StereoFXProc.cpp | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/plugins/WinVST/StereoFX/StereoFXProc.cpp b/plugins/WinVST/StereoFX/StereoFXProc.cpp new file mode 100755 index 0000000..49be44f --- /dev/null +++ b/plugins/WinVST/StereoFX/StereoFXProc.cpp @@ -0,0 +1,330 @@ +/* ======================================== + * StereoFX - StereoFX.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __StereoFX_H +#include "StereoFX.h" +#endif + +void StereoFX::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(); + float fpTemp; + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + long double inputSampleL; + long double inputSampleR; + long double mid; + long double side; + //High Impact section + double stereowide = A; + double centersquish = C; + double density = stereowide * 2.4; + double sustain = 1.0 - (1.0/(1.0 + (density/7.0))); + //this way, enhance increases up to 50% and then mid falls off beyond that + double bridgerectifier; + double count; + //Highpass section + double iirAmount = pow(B,3)/overallscale; + double tight = -0.33333333333333; + double offset; + //we are setting it up so that to either extreme we can get an audible sound, + //but sort of scaled so small adjustments don't shift the cutoff frequency yet. + + while (--sampleFrames >= 0) + { + inputSampleL = *in1; + inputSampleR = *in2; + if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) { + static int noisesource = 0; + //this declares a variable before anything else is compiled. It won't keep assigning + //it to 0 for every sample, it's as if the declaration doesn't exist in this context, + //but it lets me add this denormalization fix in a single place rather than updating + //it in three different locations. The variable isn't thread-safe but this is only + //a random seed and we can share it with whatever. + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleL = applyresidue; + } + if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) { + static int noisesource = 0; + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleR = applyresidue; + //this denormalization routine produces a white noise at -300 dB which the noise + //shaping will interact with to produce a bipolar output, but the noise is actually + //all positive. That should stop any variables from going denormal, and the routine + //only kicks in if digital black is input. As a final touch, if you save to 24-bit + //the silence will return to being digital black again. + } + //assign working variables + mid = inputSampleL + inputSampleR; + side = inputSampleL - inputSampleR; + //assign mid and side. Now, High Impact code + count = density; + while (count > 1.0) + { + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + bridgerectifier = sin(bridgerectifier); + if (side > 0.0) side = bridgerectifier; + else side = -bridgerectifier; + count = count - 1.0; + } + //we have now accounted for any really high density settings. + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + bridgerectifier = sin(bridgerectifier); + if (side > 0) side = (side*(1-count))+(bridgerectifier*count); + else side = (side*(1-count))-(bridgerectifier*count); + //blend according to density control + //done first density. Next, sustain-reducer + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + bridgerectifier = (1-cos(bridgerectifier))*3.141592653589793; + if (side > 0) side = (side*(1-sustain))+(bridgerectifier*sustain); + else side = (side*(1-sustain))-(bridgerectifier*sustain); + //done with High Impact code + + //now, Highpass code + offset = 0.666666666666666 + ((1-fabs(side))*tight); + if (offset < 0) offset = 0; + if (offset > 1) offset = 1; + if (flip) + { + iirSampleA = (iirSampleA * (1 - (offset * iirAmount))) + (side * (offset * iirAmount)); + side = side - iirSampleA; + } + else + { + iirSampleB = (iirSampleB * (1 - (offset * iirAmount))) + (side * (offset * iirAmount)); + side = side - iirSampleB; + } + //done with Highpass code + + bridgerectifier = fabs(mid)/1.273239544735162; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + bridgerectifier = sin(bridgerectifier)*1.273239544735162; + if (mid > 0) mid = (mid*(1-centersquish))+(bridgerectifier*centersquish); + else mid = (mid*(1-centersquish))-(bridgerectifier*centersquish); + //done with the mid saturating section. + + inputSampleL = (mid+side)/2.0; + inputSampleR = (mid-side)/2.0; + + //noise shaping to 32-bit floating point + if (flip) { + fpTemp = inputSampleL; + fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeLA; + fpTemp = inputSampleR; + fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeRA; + } + else { + fpTemp = inputSampleL; + fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeLB; + fpTemp = inputSampleR; + fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeRB; + } + flip = !flip; + //end noise shaping on 32 bit output + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void StereoFX::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 fpTemp; + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + long double inputSampleL; + long double inputSampleR; + long double mid; + long double side; + //High Impact section + double stereowide = A; + double centersquish = C; + double density = stereowide * 2.4; + double sustain = 1.0 - (1.0/(1.0 + (density/7.0))); + //this way, enhance increases up to 50% and then mid falls off beyond that + double bridgerectifier; + double count; + //Highpass section + double iirAmount = pow(B,3)/overallscale; + double tight = -0.33333333333333; + double offset; + //we are setting it up so that to either extreme we can get an audible sound, + //but sort of scaled so small adjustments don't shift the cutoff frequency yet. + + while (--sampleFrames >= 0) + { + inputSampleL = *in1; + inputSampleR = *in2; + if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) { + static int noisesource = 0; + //this declares a variable before anything else is compiled. It won't keep assigning + //it to 0 for every sample, it's as if the declaration doesn't exist in this context, + //but it lets me add this denormalization fix in a single place rather than updating + //it in three different locations. The variable isn't thread-safe but this is only + //a random seed and we can share it with whatever. + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleL = applyresidue; + } + if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) { + static int noisesource = 0; + noisesource = noisesource % 1700021; noisesource++; + int residue = noisesource * noisesource; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + double applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleR = applyresidue; + //this denormalization routine produces a white noise at -300 dB which the noise + //shaping will interact with to produce a bipolar output, but the noise is actually + //all positive. That should stop any variables from going denormal, and the routine + //only kicks in if digital black is input. As a final touch, if you save to 24-bit + //the silence will return to being digital black again. + } + //assign working variables + mid = inputSampleL + inputSampleR; + side = inputSampleL - inputSampleR; + //assign mid and side. Now, High Impact code + count = density; + while (count > 1.0) + { + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + bridgerectifier = sin(bridgerectifier); + if (side > 0.0) side = bridgerectifier; + else side = -bridgerectifier; + count = count - 1.0; + } + //we have now accounted for any really high density settings. + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + bridgerectifier = sin(bridgerectifier); + if (side > 0) side = (side*(1-count))+(bridgerectifier*count); + else side = (side*(1-count))-(bridgerectifier*count); + //blend according to density control + //done first density. Next, sustain-reducer + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + bridgerectifier = (1-cos(bridgerectifier))*3.141592653589793; + if (side > 0) side = (side*(1-sustain))+(bridgerectifier*sustain); + else side = (side*(1-sustain))-(bridgerectifier*sustain); + //done with High Impact code + + //now, Highpass code + offset = 0.666666666666666 + ((1-fabs(side))*tight); + if (offset < 0) offset = 0; + if (offset > 1) offset = 1; + if (flip) + { + iirSampleA = (iirSampleA * (1 - (offset * iirAmount))) + (side * (offset * iirAmount)); + side = side - iirSampleA; + } + else + { + iirSampleB = (iirSampleB * (1 - (offset * iirAmount))) + (side * (offset * iirAmount)); + side = side - iirSampleB; + } + //done with Highpass code + + bridgerectifier = fabs(mid)/1.273239544735162; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + bridgerectifier = sin(bridgerectifier)*1.273239544735162; + if (mid > 0) mid = (mid*(1-centersquish))+(bridgerectifier*centersquish); + else mid = (mid*(1-centersquish))-(bridgerectifier*centersquish); + //done with the mid saturating section. + + inputSampleL = (mid+side)/2.0; + inputSampleR = (mid-side)/2.0; + + //noise shaping to 64-bit floating point + if (flip) { + fpTemp = inputSampleL; + fpNShapeLA = (fpNShapeLA*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeLA; + fpTemp = inputSampleR; + fpNShapeRA = (fpNShapeRA*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeRA; + } + else { + fpTemp = inputSampleL; + fpNShapeLB = (fpNShapeLB*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeLB; + fpTemp = inputSampleR; + fpNShapeRB = (fpNShapeRB*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeRB; + } + flip = !flip; + //end noise shaping on 64 bit output + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +}
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