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Diffstat (limited to 'plugins/MacVST/DeRez/source/DeRezProc.cpp')
| -rwxr-xr-x | plugins/MacVST/DeRez/source/DeRezProc.cpp | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/plugins/MacVST/DeRez/source/DeRezProc.cpp b/plugins/MacVST/DeRez/source/DeRezProc.cpp new file mode 100755 index 0000000..0fed9b4 --- /dev/null +++ b/plugins/MacVST/DeRez/source/DeRezProc.cpp @@ -0,0 +1,320 @@ +/* ======================================== + * DeRez - DeRez.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __DeRez_H +#include "DeRez.h" +#endif + +void DeRez::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(); + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + + double targetA = pow(A,3)+0.0005; + if (targetA > 1.0) targetA = 1.0; + double soften = (1.0 + targetA)/2; + double targetB = pow(1.0-B,3) / 3; + targetA /= overallscale; + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1; + long double 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. + } + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + incrementA = ((incrementA*999.0)+targetA)/1000.0; + incrementB = ((incrementB*999.0)+targetB)/1000.0; + //incrementA is the frequency derez + //incrementB is the bit depth derez + position += incrementA; + + long double outputSampleL = heldSampleL; + long double outputSampleR = heldSampleR; + if (position > 1.0) + { + position -= 1.0; + heldSampleL = (lastSampleL * position) + (inputSampleL * (1.0-position)); + outputSampleL = (outputSampleL * (1.0-soften)) + (heldSampleL * soften); + //softens the edge of the derez + heldSampleR = (lastSampleR * position) + (inputSampleR * (1.0-position)); + outputSampleR = (outputSampleR * (1.0-soften)) + (heldSampleR * soften); + //softens the edge of the derez + } + inputSampleL = outputSampleL; + inputSampleR = outputSampleR; + + long double offset; + if (incrementB > 0.0005) + { + if (inputSampleL > 0) + { + offset = inputSampleL; + while (offset > 0) {offset -= incrementB;} + inputSampleL -= offset; + //it's below 0 so subtracting adds the remainder + } + if (inputSampleR > 0) + { + offset = inputSampleR; + while (offset > 0) {offset -= incrementB;} + inputSampleR -= offset; + //it's below 0 so subtracting adds the remainder + } + + if (inputSampleL < 0) + { + offset = inputSampleL; + while (offset < 0) {offset += incrementB;} + inputSampleL -= offset; + //it's above 0 so subtracting subtracts the remainder + } + if (inputSampleR < 0) + { + offset = inputSampleR; + while (offset < 0) {offset += incrementB;} + inputSampleR -= offset; + //it's above 0 so subtracting subtracts the remainder + } + + inputSampleL *= (1.0 - incrementB); + inputSampleR *= (1.0 - incrementB); + } + + lastSampleL = drySampleL; + lastSampleR = drySampleR; + + //noise shaping to 32-bit floating point + float fpTemp; + 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 DeRez::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(); + long double fpOld = 0.618033988749894848204586; //golden ratio! + long double fpNew = 1.0 - fpOld; + + double targetA = pow(A,3)+0.0005; + if (targetA > 1.0) targetA = 1.0; + double soften = (1.0 + targetA)/2; + double targetB = pow(1.0-B,3) / 3; + targetA /= overallscale; + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1; + long double 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. + } + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + incrementA = ((incrementA*999.0)+targetA)/1000.0; + incrementB = ((incrementB*999.0)+targetB)/1000.0; + //incrementA is the frequency derez + //incrementB is the bit depth derez + position += incrementA; + + long double outputSampleL = heldSampleL; + long double outputSampleR = heldSampleR; + if (position > 1.0) + { + position -= 1.0; + heldSampleL = (lastSampleL * position) + (inputSampleL * (1.0-position)); + outputSampleL = (outputSampleL * (1.0-soften)) + (heldSampleL * soften); + //softens the edge of the derez + heldSampleR = (lastSampleR * position) + (inputSampleR * (1.0-position)); + outputSampleR = (outputSampleR * (1.0-soften)) + (heldSampleR * soften); + //softens the edge of the derez + } + inputSampleL = outputSampleL; + inputSampleR = outputSampleR; + + long double offset; + if (incrementB > 0.0005) + { + if (inputSampleL > 0) + { + offset = inputSampleL; + while (offset > 0) {offset -= incrementB;} + inputSampleL -= offset; + //it's below 0 so subtracting adds the remainder + } + if (inputSampleR > 0) + { + offset = inputSampleR; + while (offset > 0) {offset -= incrementB;} + inputSampleR -= offset; + //it's below 0 so subtracting adds the remainder + } + + if (inputSampleL < 0) + { + offset = inputSampleL; + while (offset < 0) {offset += incrementB;} + inputSampleL -= offset; + //it's above 0 so subtracting subtracts the remainder + } + if (inputSampleR < 0) + { + offset = inputSampleR; + while (offset < 0) {offset += incrementB;} + inputSampleR -= offset; + //it's above 0 so subtracting subtracts the remainder + } + + inputSampleL *= (1.0 - incrementB); + inputSampleR *= (1.0 - incrementB); + } + + lastSampleL = drySampleL; + lastSampleR = drySampleR; + + //noise shaping to 64-bit floating point + double fpTemp; + 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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