diff options
Diffstat (limited to 'plugins/WinVST/SideDull/SideDullProc.cpp')
| -rwxr-xr-x | plugins/WinVST/SideDull/SideDullProc.cpp | 234 |
1 files changed, 234 insertions, 0 deletions
diff --git a/plugins/WinVST/SideDull/SideDullProc.cpp b/plugins/WinVST/SideDull/SideDullProc.cpp new file mode 100755 index 0000000..347e5e8 --- /dev/null +++ b/plugins/WinVST/SideDull/SideDullProc.cpp @@ -0,0 +1,234 @@ +/* ======================================== + * SideDull - SideDull.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __SideDull_H +#include "SideDull.h" +#endif + +void SideDull::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; + double side; + double iirAmount = pow(A,3)/overallscale; + + 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. + } + + mid = inputSampleL + inputSampleR; + side = inputSampleL - inputSampleR; + + if (flip) + { + iirSampleA = (iirSampleA * (1 - iirAmount)) + (side * iirAmount); + side = iirSampleA; + } + else + { + iirSampleB = (iirSampleB * (1 - iirAmount)) + (side * iirAmount); + side = iirSampleB; + } + //highpass section + + inputSampleL = (mid+side)/2.0; + inputSampleR = (mid-side)/2.0; + + //noise shaping to 32-bit floating point + if (flip) { + fpTemp = inputSampleL; + fpNShapeAL = (fpNShapeAL*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeAL; + + fpTemp = inputSampleR; + fpNShapeAR = (fpNShapeAR*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeAR; + } + else { + fpTemp = inputSampleL; + fpNShapeBL = (fpNShapeBL*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeBL; + + fpTemp = inputSampleR; + fpNShapeBR = (fpNShapeBR*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeBR; + } + flip = !flip; + //end noise shaping on 32 bit output + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void SideDull::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; //this is different from singlereplacing + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + + long double inputSampleL; + long double inputSampleR; + long double mid; + double side; + double iirAmount = pow(A,3)/overallscale; + + 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. + } + + mid = inputSampleL + inputSampleR; + side = inputSampleL - inputSampleR; + + if (flip) + { + iirSampleA = (iirSampleA * (1 - iirAmount)) + (side * iirAmount); + side = iirSampleA; + } + else + { + iirSampleB = (iirSampleB * (1 - iirAmount)) + (side * iirAmount); + side = iirSampleB; + } + //highpass section + + inputSampleL = (mid+side)/2.0; + inputSampleR = (mid-side)/2.0; + + //noise shaping to 64-bit floating point + if (flip) { + fpTemp = inputSampleL; + fpNShapeAL = (fpNShapeAL*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeAL; + + fpTemp = inputSampleR; + fpNShapeAR = (fpNShapeAR*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeAR; + } + else { + fpTemp = inputSampleL; + fpNShapeBL = (fpNShapeBL*fpOld)+((inputSampleL-fpTemp)*fpNew); + inputSampleL += fpNShapeBL; + + fpTemp = inputSampleR; + fpNShapeBR = (fpNShapeBR*fpOld)+((inputSampleR-fpTemp)*fpNew); + inputSampleR += fpNShapeBR; + } + flip = !flip; + //end noise shaping on 64 bit output + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +}
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