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Diffstat (limited to 'plugins/WinVST/PDChannel/PDChannelProc.cpp')
| -rwxr-xr-x | plugins/WinVST/PDChannel/PDChannelProc.cpp | 284 |
1 files changed, 284 insertions, 0 deletions
diff --git a/plugins/WinVST/PDChannel/PDChannelProc.cpp b/plugins/WinVST/PDChannel/PDChannelProc.cpp new file mode 100755 index 0000000..d8f79df --- /dev/null +++ b/plugins/WinVST/PDChannel/PDChannelProc.cpp @@ -0,0 +1,284 @@ +/* ======================================== + * PDChannel - PDChannel.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __PDChannel_H +#include "PDChannel.h" +#endif + +void PDChannel::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) +{ + float* in1 = inputs[0]; + float* in2 = inputs[1]; + float* out1 = outputs[0]; + float* out2 = outputs[1]; + float fpTemp; + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + + double inputgain = A; + double intensity = B; + double applyL; + double applyR; + + double drySampleL; + double drySampleR; + long double inputSampleL; + long double inputSampleR; + + if (settingchase != inputgain) { + chasespeed *= 2.0; + settingchase = inputgain; + } + if (chasespeed > 2500.0) chasespeed = 2500.0; + if (gainchase < 0.0) gainchase = inputgain; + + 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. + } + + chasespeed *= 0.9999; + chasespeed -= 0.01; + if (chasespeed < 350.0) chasespeed = 350.0; + //we have our chase speed compensated for recent fader activity + + gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0)); + //gainchase is chasing the target, as a simple multiply gain factor + + if (1.0 != gainchase) { + inputSampleL *= gainchase; + inputSampleR *= gainchase; + } + //done with trim control + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //amplitude aspect + + drySampleL = inputSampleL; + drySampleR = inputSampleR; + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //basic distortion factor + + applyL = (fabs(previousSampleL + inputSampleL) / 2.0) * intensity; + applyR = (fabs(previousSampleR + inputSampleR) / 2.0) * intensity; + //saturate less if previous sample was undistorted and low level, or if it was + //inverse polarity. Lets through highs and brightness more. + + inputSampleL = (drySampleL * (1.0 - applyL)) + (inputSampleL * applyL); + inputSampleR = (drySampleR * (1.0 - applyR)) + (inputSampleR * applyR); + //dry-wet control for intensity also has FM modulation to clean up highs + + previousSampleL = sin(drySampleL); + previousSampleR = sin(drySampleR); + //apply the sine while storing previous sample + + //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 PDChannel::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) +{ + double* in1 = inputs[0]; + double* in2 = inputs[1]; + double* out1 = outputs[0]; + double* out2 = outputs[1]; + double fpTemp; + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + + double inputgain = A; + double intensity = B; + double applyL; + double applyR; + + double drySampleL; + double drySampleR; + long double inputSampleL; + long double inputSampleR; + + if (settingchase != inputgain) { + chasespeed *= 2.0; + settingchase = inputgain; + } + if (chasespeed > 2500.0) chasespeed = 2500.0; + if (gainchase < 0.0) gainchase = inputgain; + + 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. + } + + chasespeed *= 0.9999; + chasespeed -= 0.01; + if (chasespeed < 350.0) chasespeed = 350.0; + //we have our chase speed compensated for recent fader activity + + gainchase = (((gainchase*chasespeed)+inputgain)/(chasespeed+1.0)); + //gainchase is chasing the target, as a simple multiply gain factor + + if (1.0 != gainchase) { + inputSampleL *= gainchase; + inputSampleR *= gainchase; + } + //done with trim control + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //amplitude aspect + + drySampleL = inputSampleL; + drySampleR = inputSampleR; + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //basic distortion factor + + applyL = (fabs(previousSampleL + inputSampleL) / 2.0) * intensity; + applyR = (fabs(previousSampleR + inputSampleR) / 2.0) * intensity; + //saturate less if previous sample was undistorted and low level, or if it was + //inverse polarity. Lets through highs and brightness more. + + inputSampleL = (drySampleL * (1.0 - applyL)) + (inputSampleL * applyL); + inputSampleR = (drySampleR * (1.0 - applyR)) + (inputSampleR * applyR); + //dry-wet control for intensity also has FM modulation to clean up highs + + previousSampleL = sin(drySampleL); + previousSampleR = sin(drySampleR); + //apply the sine while storing previous sample + + //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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