diff options
Diffstat (limited to 'plugins/MacVST/SlewOnly/source/SlewOnlyProc.cpp')
| -rwxr-xr-x | plugins/MacVST/SlewOnly/source/SlewOnlyProc.cpp | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/plugins/MacVST/SlewOnly/source/SlewOnlyProc.cpp b/plugins/MacVST/SlewOnly/source/SlewOnlyProc.cpp new file mode 100755 index 0000000..5fc12c3 --- /dev/null +++ b/plugins/MacVST/SlewOnly/source/SlewOnlyProc.cpp @@ -0,0 +1,159 @@ +/* ======================================== + * SlewOnly - SlewOnly.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __SlewOnly_H +#include "SlewOnly.h" +#endif + +void SlewOnly::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) +{ + float* in1 = inputs[0]; + float* in2 = inputs[1]; + float* out1 = outputs[0]; + float* out2 = outputs[1]; + + long double inputSampleL; + long double inputSampleR; + long double outputSampleL; + long double outputSampleR; + double trim = 2.302585092994045684017991; //natural logarithm of 10 + + 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. + } + + outputSampleL = (inputSampleL - lastSampleL)*trim; + outputSampleR = (inputSampleR - lastSampleR)*trim; + lastSampleL = inputSampleL; + lastSampleR = inputSampleR; + if (outputSampleL > 1.0) outputSampleL = 1.0; + if (outputSampleR > 1.0) outputSampleR = 1.0; + if (outputSampleL < -1.0) outputSampleL = -1.0; + if (outputSampleR < -1.0) outputSampleR = -1.0; + + *out1 = outputSampleL; + *out2 = outputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void SlewOnly::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) +{ + double* in1 = inputs[0]; + double* in2 = inputs[1]; + double* out1 = outputs[0]; + double* out2 = outputs[1]; + + long double inputSampleL; + long double inputSampleR; + long double outputSampleL; + long double outputSampleR; + double trim = 2.302585092994045684017991; //natural logarithm of 10 + + 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. + } + + + outputSampleL = (inputSampleL - lastSampleL)*trim; + outputSampleR = (inputSampleR - lastSampleR)*trim; + lastSampleL = inputSampleL; + lastSampleR = inputSampleR; + if (outputSampleL > 1.0) outputSampleL = 1.0; + if (outputSampleR > 1.0) outputSampleR = 1.0; + if (outputSampleL < -1.0) outputSampleL = -1.0; + if (outputSampleR < -1.0) outputSampleR = -1.0; + + *out1 = outputSampleL; + *out2 = outputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +}
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