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Diffstat (limited to 'plugins/MacVST/ButterComp/source/ButterCompProc.cpp')
| -rwxr-xr-x | plugins/MacVST/ButterComp/source/ButterCompProc.cpp | 416 |
1 files changed, 416 insertions, 0 deletions
diff --git a/plugins/MacVST/ButterComp/source/ButterCompProc.cpp b/plugins/MacVST/ButterComp/source/ButterCompProc.cpp new file mode 100755 index 0000000..ea52946 --- /dev/null +++ b/plugins/MacVST/ButterComp/source/ButterCompProc.cpp @@ -0,0 +1,416 @@ +/* ======================================== + * ButterComp - ButterComp.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __ButterComp_H +#include "ButterComp.h" +#endif + +void ButterComp::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; + + double inputposL; + double inputnegL; + double calcposL; + double calcnegL; + double outputposL; + double outputnegL; + long double totalmultiplierL; + long double inputSampleL; + double drySampleL; + + double inputposR; + double inputnegR; + double calcposR; + double calcnegR; + double outputposR; + double outputnegR; + long double totalmultiplierR; + long double inputSampleR; + double drySampleR; + + double inputgain = pow(10.0,(A*14.0)/20.0); + double wet = B; + double dry = 1.0 - wet; + double outputgain = inputgain; + outputgain -= 1.0; + outputgain /= 1.5; + outputgain += 1.0; + double divisor = 0.012 * (A / 135.0); + divisor /= overallscale; + double remainder = divisor; + divisor = 1.0 - divisor; + + 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; + + inputSampleL *= inputgain; + inputSampleR *= inputgain; + + inputposL = inputSampleL + 1.0; + if (inputposL < 0.0) inputposL = 0.0; + outputposL = inputposL / 2.0; + if (outputposL > 1.0) outputposL = 1.0; + inputposL *= inputposL; + targetposL *= divisor; + targetposL += (inputposL * remainder); + calcposL = pow((1.0/targetposL),2); + + inputnegL = (-inputSampleL) + 1.0; + if (inputnegL < 0.0) inputnegL = 0.0; + outputnegL = inputnegL / 2.0; + if (outputnegL > 1.0) outputnegL = 1.0; + inputnegL *= inputnegL; + targetnegL *= divisor; + targetnegL += (inputnegL * remainder); + calcnegL = pow((1.0/targetnegL),2); + //now we have mirrored targets for comp + //outputpos and outputneg go from 0 to 1 + + inputposR = inputSampleR + 1.0; + if (inputposR < 0.0) inputposR = 0.0; + outputposR = inputposR / 2.0; + if (outputposR > 1.0) outputposR = 1.0; + inputposR *= inputposR; + targetposR *= divisor; + targetposR += (inputposR * remainder); + calcposR = pow((1.0/targetposR),2); + + inputnegR = (-inputSampleR) + 1.0; + if (inputnegR < 0.0) inputnegR = 0.0; + outputnegR = inputnegR / 2.0; + if (outputnegR > 1.0) outputnegR = 1.0; + inputnegR *= inputnegR; + targetnegR *= divisor; + targetnegR += (inputnegR * remainder); + calcnegR = pow((1.0/targetnegR),2); + //now we have mirrored targets for comp + //outputpos and outputneg go from 0 to 1 + + + if (inputSampleL > 0) + { //working on pos + controlAposL *= divisor; + controlAposL += (calcposL*remainder); + } + else + { //working on neg + controlAnegL *= divisor; + controlAnegL += (calcnegL*remainder); + } + //this causes each of the four to update only when active and in the correct 'flip' + + if (inputSampleR > 0) + { //working on pos + controlAposR *= divisor; + controlAposR += (calcposR*remainder); + } + else + { //working on neg + controlAnegR *= divisor; + controlAnegR += (calcnegR*remainder); + } + //this causes each of the four to update only when active and in the correct 'flip' + + totalmultiplierL = (controlAposL * outputposL) + (controlAnegL * outputnegL); + totalmultiplierR = (controlAposR * outputposR) + (controlAnegR * outputnegR); + //this combines the sides according to flip, blending relative to the input value + + inputSampleL *= totalmultiplierL; + inputSampleL /= outputgain; + + inputSampleR *= totalmultiplierR; + inputSampleR /= outputgain; + + if (wet !=1.0) { + inputSampleL = (inputSampleL * wet) + (drySampleL * dry); + inputSampleR = (inputSampleR * wet) + (drySampleR * dry); + } + + //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 ButterComp::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; + + double inputposL; + double inputnegL; + double calcposL; + double calcnegL; + double outputposL; + double outputnegL; + long double totalmultiplierL; + long double inputSampleL; + double drySampleL; + + double inputposR; + double inputnegR; + double calcposR; + double calcnegR; + double outputposR; + double outputnegR; + long double totalmultiplierR; + long double inputSampleR; + double drySampleR; + + double inputgain = pow(10.0,(A*14.0)/20.0); + double wet = B; + double dry = 1.0 - wet; + double outputgain = inputgain; + outputgain -= 1.0; + outputgain /= 1.5; + outputgain += 1.0; + double divisor = 0.012 * (A / 135.0); + divisor /= overallscale; + double remainder = divisor; + divisor = 1.0 - divisor; + + 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; + + inputSampleL *= inputgain; + inputSampleR *= inputgain; + + inputposL = inputSampleL + 1.0; + if (inputposL < 0.0) inputposL = 0.0; + outputposL = inputposL / 2.0; + if (outputposL > 1.0) outputposL = 1.0; + inputposL *= inputposL; + targetposL *= divisor; + targetposL += (inputposL * remainder); + calcposL = pow((1.0/targetposL),2); + + inputnegL = (-inputSampleL) + 1.0; + if (inputnegL < 0.0) inputnegL = 0.0; + outputnegL = inputnegL / 2.0; + if (outputnegL > 1.0) outputnegL = 1.0; + inputnegL *= inputnegL; + targetnegL *= divisor; + targetnegL += (inputnegL * remainder); + calcnegL = pow((1.0/targetnegL),2); + //now we have mirrored targets for comp + //outputpos and outputneg go from 0 to 1 + + inputposR = inputSampleR + 1.0; + if (inputposR < 0.0) inputposR = 0.0; + outputposR = inputposR / 2.0; + if (outputposR > 1.0) outputposR = 1.0; + inputposR *= inputposR; + targetposR *= divisor; + targetposR += (inputposR * remainder); + calcposR = pow((1.0/targetposR),2); + + inputnegR = (-inputSampleR) + 1.0; + if (inputnegR < 0.0) inputnegR = 0.0; + outputnegR = inputnegR / 2.0; + if (outputnegR > 1.0) outputnegR = 1.0; + inputnegR *= inputnegR; + targetnegR *= divisor; + targetnegR += (inputnegR * remainder); + calcnegR = pow((1.0/targetnegR),2); + //now we have mirrored targets for comp + //outputpos and outputneg go from 0 to 1 + + + if (inputSampleL > 0) + { //working on pos + controlAposL *= divisor; + controlAposL += (calcposL*remainder); + } + else + { //working on neg + controlAnegL *= divisor; + controlAnegL += (calcnegL*remainder); + } + //this causes each of the four to update only when active and in the correct 'flip' + + if (inputSampleR > 0) + { //working on pos + controlAposR *= divisor; + controlAposR += (calcposR*remainder); + } + else + { //working on neg + controlAnegR *= divisor; + controlAnegR += (calcnegR*remainder); + } + //this causes each of the four to update only when active and in the correct 'flip' + + totalmultiplierL = (controlAposL * outputposL) + (controlAnegL * outputnegL); + totalmultiplierR = (controlAposR * outputposR) + (controlAnegR * outputnegR); + //this combines the sides according to flip, blending relative to the input value + + inputSampleL *= totalmultiplierL; + inputSampleL /= outputgain; + + inputSampleR *= totalmultiplierR; + inputSampleR /= outputgain; + + if (wet !=1.0) { + inputSampleL = (inputSampleL * wet) + (drySampleL * dry); + inputSampleR = (inputSampleR * wet) + (drySampleR * dry); + } + + //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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