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Diffstat (limited to 'plugins/WinVST/Wider/WiderProc.cpp')
| -rwxr-xr-x | plugins/WinVST/Wider/WiderProc.cpp | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/plugins/WinVST/Wider/WiderProc.cpp b/plugins/WinVST/Wider/WiderProc.cpp new file mode 100755 index 0000000..618e651 --- /dev/null +++ b/plugins/WinVST/Wider/WiderProc.cpp @@ -0,0 +1,336 @@ +/* ======================================== + * Wider - Wider.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Wider_H +#include "Wider.h" +#endif + +void Wider::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; + double drySampleL; + double drySampleR; + long double mid; + long double side; + double out; + double densityside = (A*2.0)-1.0; + double densitymid = (B*2.0)-1.0; + double wet = C; + double dry = 1.0 - wet; + wet *= 0.5; //we make mid-side by adding/subtracting both channels into each channel + //and that's why we gotta divide it by 2: otherwise everything's doubled. So, premultiply it to save an extra 'math' + double offset = (densityside-densitymid)/2; + if (offset > 0) offset = sin(offset); + if (offset < 0) offset = -sin(-offset); + offset = -(pow(offset,4) * 20 * overallscale); + int near = (int)floor(fabs(offset)); + double farLevel = fabs(offset) - near; + int far = near + 1; + double nearLevel = 1.0 - farLevel; + double bridgerectifier; + //interpolating the sample + + 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. + } + drySampleL = inputSampleL; + drySampleR = inputSampleR; + //assign working variables + mid = inputSampleL + inputSampleR; + side = inputSampleL - inputSampleR; + //assign mid and side. Now, High Impact code + + if (densityside != 0.0) + { + out = fabs(densityside); + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (densityside > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (side > 0) side = (side*(1-out))+(bridgerectifier*out); + else side = (side*(1-out))-(bridgerectifier*out); + //blend according to density control + } + + if (densitymid != 0.0) + { + out = fabs(densitymid); + bridgerectifier = fabs(mid)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (densitymid > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (mid > 0) mid = (mid*(1-out))+(bridgerectifier*out); + else mid = (mid*(1-out))-(bridgerectifier*out); + //blend according to density control + } + + if (count < 1 || count > 2048) {count = 2048;} + if (offset > 0) + { + p[count+2048] = p[count] = mid; + mid = p[count+near]*nearLevel; + mid += p[count+far]*farLevel; + } + + if (offset < 0) + { + p[count+2048] = p[count] = side; + side = p[count+near]*nearLevel; + side += p[count+far]*farLevel; + } + count -= 1; + + inputSampleL = (drySampleL * dry) + ((mid+side) * wet); + inputSampleR = (drySampleR * dry) + ((mid-side) * wet); + + //noise shaping to 32-bit floating point + if (fpFlip) { + 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; + } + fpFlip = !fpFlip; + //end noise shaping on 32 bit output + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void Wider::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; + double drySampleL; + double drySampleR; + long double mid; + long double side; + double out; + double densityside = (A*2.0)-1.0; + double densitymid = (B*2.0)-1.0; + double wet = C; + double dry = 1.0 - wet; + wet *= 0.5; //we make mid-side by adding/subtracting both channels into each channel + //and that's why we gotta divide it by 2: otherwise everything's doubled. So, premultiply it to save an extra 'math' + double offset = (densityside-densitymid)/2; + if (offset > 0) offset = sin(offset); + if (offset < 0) offset = -sin(-offset); + offset = -(pow(offset,4) * 20 * overallscale); + int near = (int)floor(fabs(offset)); + double farLevel = fabs(offset) - near; + int far = near + 1; + double nearLevel = 1.0 - farLevel; + double bridgerectifier; + //interpolating the sample + + 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. + } + drySampleL = inputSampleL; + drySampleR = inputSampleR; + //assign working variables + mid = inputSampleL + inputSampleR; + side = inputSampleL - inputSampleR; + //assign mid and side. Now, High Impact code + + if (densityside != 0.0) + { + out = fabs(densityside); + bridgerectifier = fabs(side)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (densityside > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (side > 0) side = (side*(1-out))+(bridgerectifier*out); + else side = (side*(1-out))-(bridgerectifier*out); + //blend according to density control + } + + if (densitymid != 0.0) + { + out = fabs(densitymid); + bridgerectifier = fabs(mid)*1.57079633; + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (densitymid > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (mid > 0) mid = (mid*(1-out))+(bridgerectifier*out); + else mid = (mid*(1-out))-(bridgerectifier*out); + //blend according to density control + } + + if (count < 1 || count > 2048) {count = 2048;} + if (offset > 0) + { + p[count+2048] = p[count] = mid; + mid = p[count+near]*nearLevel; + mid += p[count+far]*farLevel; + } + + if (offset < 0) + { + p[count+2048] = p[count] = side; + side = p[count+near]*nearLevel; + side += p[count+far]*farLevel; + } + count -= 1; + + inputSampleL = (drySampleL * dry) + ((mid+side) * wet); + inputSampleR = (drySampleR * dry) + ((mid-side) * wet); + + //noise shaping to 64-bit floating point + if (fpFlip) { + 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; + } + fpFlip = !fpFlip; + //end noise shaping on 64 bit output + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +}
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