diff options
Diffstat (limited to 'plugins/LinuxVST/src/DitherFloat/DitherFloatProc.cpp')
| -rwxr-xr-x | plugins/LinuxVST/src/DitherFloat/DitherFloatProc.cpp | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/plugins/LinuxVST/src/DitherFloat/DitherFloatProc.cpp b/plugins/LinuxVST/src/DitherFloat/DitherFloatProc.cpp new file mode 100755 index 0000000..3c76a1a --- /dev/null +++ b/plugins/LinuxVST/src/DitherFloat/DitherFloatProc.cpp @@ -0,0 +1,184 @@ +/* ======================================== + * DitherFloat - DitherFloat.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __DitherFloat_H +#include "DitherFloat.h" +#endif + +void DitherFloat::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(); + + int floatOffset = (A * 32); + long double blend = B; + + long double gain = 0; + + switch (floatOffset) + { + case 0: gain = 1.0; break; + case 1: gain = 2.0; break; + case 2: gain = 4.0; break; + case 3: gain = 8.0; break; + case 4: gain = 16.0; break; + case 5: gain = 32.0; break; + case 6: gain = 64.0; break; + case 7: gain = 128.0; break; + case 8: gain = 256.0; break; + case 9: gain = 512.0; break; + case 10: gain = 1024.0; break; + case 11: gain = 2048.0; break; + case 12: gain = 4096.0; break; + case 13: gain = 8192.0; break; + case 14: gain = 16384.0; break; + case 15: gain = 32768.0; break; + case 16: gain = 65536.0; break; + case 17: gain = 131072.0; break; + case 18: gain = 262144.0; break; + case 19: gain = 524288.0; break; + case 20: gain = 1048576.0; break; + case 21: gain = 2097152.0; break; + case 22: gain = 4194304.0; break; + case 23: gain = 8388608.0; break; + case 24: gain = 16777216.0; break; + case 25: gain = 33554432.0; break; + case 26: gain = 67108864.0; break; + case 27: gain = 134217728.0; break; + case 28: gain = 268435456.0; break; + case 29: gain = 536870912.0; break; + case 30: gain = 1073741824.0; break; + case 31: gain = 2147483648.0; break; + case 32: gain = 4294967296.0; break; + } + //we are directly punching in the gain values rather than calculating them + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1 + (gain-1); + long double inputSampleR = *in2 + (gain-1); + + + + //stereo 32 bit dither, made small and tidy. + int expon; frexpf((float)inputSampleL, &expon); + long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62) * blend; //remove 'blend' for real use, it's for the demo; + inputSampleL += (dither-fpNShapeL); fpNShapeL = dither; + frexpf((float)inputSampleR, &expon); + dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62) * blend; //remove 'blend' for real use, it's for the demo; + inputSampleR += (dither-fpNShapeR); fpNShapeR = dither; + //end 32 bit dither + + + + inputSampleL = (float)inputSampleL; //equivalent of 'floor' for 32 bit floating point + inputSampleR = (float)inputSampleR; //equivalent of 'floor' for 32 bit floating point + //We do that separately, we're truncating to floating point WHILE heavily offset. + + *out1 = inputSampleL - (gain-1); + *out2 = inputSampleR - (gain-1); + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void DitherFloat::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(); + + int floatOffset = (A * 32); + long double blend = B; + + long double gain = 0; + + switch (floatOffset) + { + case 0: gain = 1.0; break; + case 1: gain = 2.0; break; + case 2: gain = 4.0; break; + case 3: gain = 8.0; break; + case 4: gain = 16.0; break; + case 5: gain = 32.0; break; + case 6: gain = 64.0; break; + case 7: gain = 128.0; break; + case 8: gain = 256.0; break; + case 9: gain = 512.0; break; + case 10: gain = 1024.0; break; + case 11: gain = 2048.0; break; + case 12: gain = 4096.0; break; + case 13: gain = 8192.0; break; + case 14: gain = 16384.0; break; + case 15: gain = 32768.0; break; + case 16: gain = 65536.0; break; + case 17: gain = 131072.0; break; + case 18: gain = 262144.0; break; + case 19: gain = 524288.0; break; + case 20: gain = 1048576.0; break; + case 21: gain = 2097152.0; break; + case 22: gain = 4194304.0; break; + case 23: gain = 8388608.0; break; + case 24: gain = 16777216.0; break; + case 25: gain = 33554432.0; break; + case 26: gain = 67108864.0; break; + case 27: gain = 134217728.0; break; + case 28: gain = 268435456.0; break; + case 29: gain = 536870912.0; break; + case 30: gain = 1073741824.0; break; + case 31: gain = 2147483648.0; break; + case 32: gain = 4294967296.0; break; + } + //we are directly punching in the gain values rather than calculating them + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1 + (gain-1); + long double inputSampleR = *in2 + (gain-1); + + + + //stereo 32 bit dither, made small and tidy. + int expon; frexpf((float)inputSampleL, &expon); + long double dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62) * blend; //remove 'blend' for real use, it's for the demo; + inputSampleL += (dither-fpNShapeL); fpNShapeL = dither; + frexpf((float)inputSampleR, &expon); + dither = (rand()/(RAND_MAX*7.737125245533627e+25))*pow(2,expon+62) * blend; //remove 'blend' for real use, it's for the demo; + inputSampleR += (dither-fpNShapeR); fpNShapeR = dither; + //end 32 bit dither + + + + inputSampleL = (float)inputSampleL; //equivalent of 'floor' for 32 bit floating point + inputSampleR = (float)inputSampleR; //equivalent of 'floor' for 32 bit floating point + //We do that separately, we're truncating to floating point WHILE heavily offset. + + //note for 64 bit version: this is not for actually dithering 64 bit floats! + //This is specifically for demonstrating the sound of 32 bit floating point dither + //even over a 64 bit buss. Therefore it should be using float, above! + + *out1 = inputSampleL - (gain-1); + *out2 = inputSampleR - (gain-1); + + *in1++; + *in2++; + *out1++; + *out2++; + } +} |