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Diffstat (limited to 'plugins/MacVST/Tremolo/source/TremoloProc.cpp')
| -rwxr-xr-x | plugins/MacVST/Tremolo/source/TremoloProc.cpp | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/plugins/MacVST/Tremolo/source/TremoloProc.cpp b/plugins/MacVST/Tremolo/source/TremoloProc.cpp new file mode 100755 index 0000000..d0de7cc --- /dev/null +++ b/plugins/MacVST/Tremolo/source/TremoloProc.cpp @@ -0,0 +1,357 @@ +/* ======================================== + * Tremolo - Tremolo.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Tremolo_H +#include "Tremolo.h" +#endif + +void Tremolo::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; + + speedChase = pow(A,4); + depthChase = B; + double speedSpeed = 300 / (fabs( lastSpeed - speedChase)+1.0); + double depthSpeed = 300 / (fabs( lastDepth - depthChase)+1.0); + lastSpeed = speedChase; + lastDepth = depthChase; + + double speed; + double depth; + double skew; + double density; + + double tupi = 3.141592653589793238; + double control; + double tempcontrol; + double thickness; + double out; + double bridgerectifier; + double offset; + + long double inputSampleL; + long double inputSampleR; + long double drySampleL; + long double drySampleR; + + 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; + + speedAmount = (((speedAmount*speedSpeed)+speedChase)/(speedSpeed + 1.0)); + depthAmount = (((depthAmount*depthSpeed)+depthChase)/(depthSpeed + 1.0)); + speed = 0.0001+(speedAmount/1000.0); + speed /= overallscale; + depth = 1.0 - pow(1.0-depthAmount,5); + skew = 1.0+pow(depthAmount,9); + density = ((1.0-depthAmount)*2.0) - 1.0; + + offset = sin(sweep); + sweep += speed; + if (sweep > tupi){sweep -= tupi;} + control = fabs(offset); + if (density > 0) + { + tempcontrol = sin(control); + control = (control * (1.0-density))+(tempcontrol * density); + } + else + { + tempcontrol = 1-cos(control); + control = (control * (1.0+density))+(tempcontrol * -density); + } + //produce either boosted or starved version of control signal + //will go from 0 to 1 + + thickness = ((control * 2.0) - 1.0)*skew; + out = fabs(thickness); + + //do L + bridgerectifier = fabs(inputSampleL); + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (thickness > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-out))+(bridgerectifier*out); + else inputSampleL = (inputSampleL*(1-out))-(bridgerectifier*out); + //blend according to density control + inputSampleL *= (1.0 - control); + inputSampleL *= 2.0; + //apply tremolo, apply gain boost to compensate for volume loss + inputSampleL = (drySampleL * (1-depth)) + (inputSampleL*depth); + //end L + + //do R + bridgerectifier = fabs(inputSampleR); + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (thickness > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-out))+(bridgerectifier*out); + else inputSampleR = (inputSampleR*(1-out))-(bridgerectifier*out); + //blend according to density control + inputSampleR *= (1.0 - control); + inputSampleR *= 2.0; + //apply tremolo, apply gain boost to compensate for volume loss + inputSampleR = (drySampleR * (1-depth)) + (inputSampleR*depth); + //end R + + //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 Tremolo::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; + + speedChase = pow(A,4); + depthChase = B; + double speedSpeed = 300 / (fabs( lastSpeed - speedChase)+1.0); + double depthSpeed = 300 / (fabs( lastDepth - depthChase)+1.0); + lastSpeed = speedChase; + lastDepth = depthChase; + + double speed; + double depth; + double skew; + double density; + + double tupi = 3.141592653589793238; + double control; + double tempcontrol; + double thickness; + double out; + double bridgerectifier; + double offset; + + long double inputSampleL; + long double inputSampleR; + long double drySampleL; + long double drySampleR; + + 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; + + + speedAmount = (((speedAmount*speedSpeed)+speedChase)/(speedSpeed + 1.0)); + depthAmount = (((depthAmount*depthSpeed)+depthChase)/(depthSpeed + 1.0)); + speed = 0.0001+(speedAmount/1000.0); + speed /= overallscale; + depth = 1.0 - pow(1.0-depthAmount,5); + skew = 1.0+pow(depthAmount,9); + density = ((1.0-depthAmount)*2.0) - 1.0; + + offset = sin(sweep); + sweep += speed; + if (sweep > tupi){sweep -= tupi;} + control = fabs(offset); + if (density > 0) + { + tempcontrol = sin(control); + control = (control * (1.0-density))+(tempcontrol * density); + } + else + { + tempcontrol = 1-cos(control); + control = (control * (1.0+density))+(tempcontrol * -density); + } + //produce either boosted or starved version of control signal + //will go from 0 to 1 + + thickness = ((control * 2.0) - 1.0)*skew; + out = fabs(thickness); + + //do L + bridgerectifier = fabs(inputSampleL); + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (thickness > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (inputSampleL > 0) inputSampleL = (inputSampleL*(1-out))+(bridgerectifier*out); + else inputSampleL = (inputSampleL*(1-out))-(bridgerectifier*out); + //blend according to density control + inputSampleL *= (1.0 - control); + inputSampleL *= 2.0; + //apply tremolo, apply gain boost to compensate for volume loss + inputSampleL = (drySampleL * (1-depth)) + (inputSampleL*depth); + //end L + + //do R + bridgerectifier = fabs(inputSampleR); + if (bridgerectifier > 1.57079633) bridgerectifier = 1.57079633; + //max value for sine function + if (thickness > 0) bridgerectifier = sin(bridgerectifier); + else bridgerectifier = 1-cos(bridgerectifier); + //produce either boosted or starved version + if (inputSampleR > 0) inputSampleR = (inputSampleR*(1-out))+(bridgerectifier*out); + else inputSampleR = (inputSampleR*(1-out))-(bridgerectifier*out); + //blend according to density control + inputSampleR *= (1.0 - control); + inputSampleR *= 2.0; + //apply tremolo, apply gain boost to compensate for volume loss + inputSampleR = (drySampleR * (1-depth)) + (inputSampleR*depth); + //end R + + //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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