diff options
Diffstat (limited to 'plugins/LinuxVST/src/Interstage/InterstageProc.cpp')
| -rwxr-xr-x | plugins/LinuxVST/src/Interstage/InterstageProc.cpp | 182 |
1 files changed, 182 insertions, 0 deletions
diff --git a/plugins/LinuxVST/src/Interstage/InterstageProc.cpp b/plugins/LinuxVST/src/Interstage/InterstageProc.cpp new file mode 100755 index 0000000..16f3ba1 --- /dev/null +++ b/plugins/LinuxVST/src/Interstage/InterstageProc.cpp @@ -0,0 +1,182 @@ +/* ======================================== + * Interstage - Interstage.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Interstage_H +#include "Interstage.h" +#endif + +void Interstage::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(); + + double firstStage = 0.381966011250105 / overallscale; + double iirAmount = 0.00295 / overallscale; + double threshold = 0.381966011250105 / overallscale; + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1; + long double inputSampleR = *in2; + if (fabs(inputSampleL)<1.18e-37) inputSampleL = fpd * 1.18e-37; + if (fabs(inputSampleR)<1.18e-37) inputSampleR = fpd * 1.18e-37; + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + inputSampleL = (inputSampleL+lastSampleL)*0.5; + inputSampleR = (inputSampleR+lastSampleR)*0.5; //start the lowpassing with an average + + if (flip) { + iirSampleAL = (iirSampleAL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleAL; + iirSampleCL = (iirSampleCL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleCL; + iirSampleEL = (iirSampleEL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleEL; + inputSampleL = drySampleL - inputSampleL; + //make highpass + if (inputSampleL - iirSampleAL > threshold) inputSampleL = iirSampleAL + threshold; + if (inputSampleL - iirSampleAL < -threshold) inputSampleL = iirSampleAL - threshold; + //slew limit against lowpassed reference point + + iirSampleAR = (iirSampleAR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleAR; + iirSampleCR = (iirSampleCR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleCR; + iirSampleER = (iirSampleER * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleER; + inputSampleR = drySampleR - inputSampleR; + //make highpass + if (inputSampleR - iirSampleAR > threshold) inputSampleR = iirSampleAR + threshold; + if (inputSampleR - iirSampleAR < -threshold) inputSampleR = iirSampleAR - threshold; + //slew limit against lowpassed reference point + } else { + iirSampleBL = (iirSampleBL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleBL; + iirSampleDL = (iirSampleDL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleDL; + iirSampleFL = (iirSampleFL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleFL; + inputSampleL = drySampleL - inputSampleL; + //make highpass + if (inputSampleL - iirSampleBL > threshold) inputSampleL = iirSampleBL + threshold; + if (inputSampleL - iirSampleBL < -threshold) inputSampleL = iirSampleBL - threshold; + //slew limit against lowpassed reference point + + iirSampleBR = (iirSampleBR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleBR; + iirSampleDR = (iirSampleDR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleDR; + iirSampleFR = (iirSampleFR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleFR; + inputSampleR = drySampleR - inputSampleR; + //make highpass + if (inputSampleR - iirSampleBR > threshold) inputSampleR = iirSampleBR + threshold; + if (inputSampleR - iirSampleBR < -threshold) inputSampleR = iirSampleBR - threshold; + //slew limit against lowpassed reference point + } + flip = !flip; + lastSampleL = inputSampleL; + lastSampleR = inputSampleR; + + //begin 32 bit stereo floating point dither + int expon; frexpf((float)inputSampleL, &expon); + fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; + inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62)); + frexpf((float)inputSampleR, &expon); + fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; + inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62)); + //end 32 bit stereo floating point dither + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} + +void Interstage::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 firstStage = 0.381966011250105 / overallscale; + double iirAmount = 0.00295 / overallscale; + double threshold = 0.381966011250105 / overallscale; + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1; + long double inputSampleR = *in2; + if (fabs(inputSampleL)<1.18e-43) inputSampleL = fpd * 1.18e-43; + if (fabs(inputSampleR)<1.18e-43) inputSampleR = fpd * 1.18e-43; + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + inputSampleL = (inputSampleL+lastSampleL)*0.5; + inputSampleR = (inputSampleR+lastSampleR)*0.5; //start the lowpassing with an average + + if (flip) { + iirSampleAL = (iirSampleAL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleAL; + iirSampleCL = (iirSampleCL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleCL; + iirSampleEL = (iirSampleEL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleEL; + inputSampleL = drySampleL - inputSampleL; + //make highpass + if (inputSampleL - iirSampleAL > threshold) inputSampleL = iirSampleAL + threshold; + if (inputSampleL - iirSampleAL < -threshold) inputSampleL = iirSampleAL - threshold; + //slew limit against lowpassed reference point + + iirSampleAR = (iirSampleAR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleAR; + iirSampleCR = (iirSampleCR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleCR; + iirSampleER = (iirSampleER * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleER; + inputSampleR = drySampleR - inputSampleR; + //make highpass + if (inputSampleR - iirSampleAR > threshold) inputSampleR = iirSampleAR + threshold; + if (inputSampleR - iirSampleAR < -threshold) inputSampleR = iirSampleAR - threshold; + //slew limit against lowpassed reference point + } else { + iirSampleBL = (iirSampleBL * (1 - firstStage)) + (inputSampleL * firstStage); inputSampleL = iirSampleBL; + iirSampleDL = (iirSampleDL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleDL; + iirSampleFL = (iirSampleFL * (1 - iirAmount)) + (inputSampleL * iirAmount); inputSampleL = iirSampleFL; + inputSampleL = drySampleL - inputSampleL; + //make highpass + if (inputSampleL - iirSampleBL > threshold) inputSampleL = iirSampleBL + threshold; + if (inputSampleL - iirSampleBL < -threshold) inputSampleL = iirSampleBL - threshold; + //slew limit against lowpassed reference point + + iirSampleBR = (iirSampleBR * (1 - firstStage)) + (inputSampleR * firstStage); inputSampleR = iirSampleBR; + iirSampleDR = (iirSampleDR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleDR; + iirSampleFR = (iirSampleFR * (1 - iirAmount)) + (inputSampleR * iirAmount); inputSampleR = iirSampleFR; + inputSampleR = drySampleR - inputSampleR; + //make highpass + if (inputSampleR - iirSampleBR > threshold) inputSampleR = iirSampleBR + threshold; + if (inputSampleR - iirSampleBR < -threshold) inputSampleR = iirSampleBR - threshold; + //slew limit against lowpassed reference point + } + flip = !flip; + lastSampleL = inputSampleL; + lastSampleR = inputSampleR; + + //begin 64 bit stereo floating point dither + int expon; frexp((double)inputSampleL, &expon); + fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; + inputSampleL += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62)); + frexp((double)inputSampleR, &expon); + fpd ^= fpd << 13; fpd ^= fpd >> 17; fpd ^= fpd << 5; + inputSampleR += ((double(fpd)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62)); + //end 64 bit stereo floating point dither + + *out1 = inputSampleL; + *out2 = inputSampleR; + + *in1++; + *in2++; + *out1++; + *out2++; + } +} |