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Diffstat (limited to 'plugins/MacVST/Lowpass2/source/Lowpass2Proc.cpp')
| -rwxr-xr-x | plugins/MacVST/Lowpass2/source/Lowpass2Proc.cpp | 349 |
1 files changed, 349 insertions, 0 deletions
diff --git a/plugins/MacVST/Lowpass2/source/Lowpass2Proc.cpp b/plugins/MacVST/Lowpass2/source/Lowpass2Proc.cpp new file mode 100755 index 0000000..e46b16e --- /dev/null +++ b/plugins/MacVST/Lowpass2/source/Lowpass2Proc.cpp @@ -0,0 +1,349 @@ +/* ======================================== + * Lowpass2 - Lowpass2.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Lowpass2_H +#include "Lowpass2.h" +#endif + +void Lowpass2::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames) +{ + float* in1 = inputs[0]; + float* in2 = inputs[1]; + float* out1 = outputs[0]; + float* out2 = outputs[1]; + + double iirAmount = A; + double tight = (B*2.0)-1.0; + if (iirAmount < 0.0000001) iirAmount = 0.0000001; + if (iirAmount > 1) iirAmount = 1; + if (tight < 0.0) tight *= 0.5; + double offsetL; + double offsetR; + double aWet = 1.0; + double bWet = 1.0; + double cWet = 1.0; + double dWet = C*4.0; + //four-stage wet/dry control using progressive stages that bypass when not engaged + if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;} + else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;} + else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;} + else {dWet -= 3.0;} + //this is one way to make a little set of dry/wet stages that are successively added to the + //output as the control is turned up. Each one independently goes from 0-1 and stays at 1 + //beyond that point: this is a way to progressively add a 'black box' sound processing + //which lets you fall through to simpler processing at lower settings. + double wet = D; + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1; + long double inputSampleR = *in2; + + static int noisesourceL = 0; + static int noisesourceR = 850010; + int residue; + double applyresidue; + + noisesourceL = noisesourceL % 1700021; noisesourceL++; + residue = noisesourceL * noisesourceL; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleL += applyresidue; + if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) { + inputSampleL -= applyresidue; + } + + noisesourceR = noisesourceR % 1700021; noisesourceR++; + residue = noisesourceR * noisesourceR; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleR += applyresidue; + if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) { + inputSampleR -= applyresidue; + } + //for live air, we always apply the dither noise. Then, if our result is + //effectively digital black, we'll subtract it again. We want a 'air' hiss + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + if (tight > 0) offsetL = (1 - tight) + (fabs(inputSampleL)*tight); + else offsetL = (1 + tight) + ((1-fabs(inputSampleL))*tight); + if (offsetL < 0.0000001) offsetL = 0.0000001; if (offsetL > 1) offsetL = 1; + + if (tight > 0) offsetR = (1 - tight) + (fabs(inputSampleR)*tight); + else offsetR = (1 + tight) + ((1-fabs(inputSampleR))*tight); + if (offsetR < 0.0000001) offsetR = 0.0000001; if (offsetR > 1) offsetR = 1; + + if (fpFlip) + { + if (aWet > 0.0) { + iirSampleAL = (iirSampleAL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleAL * aWet) + (inputSampleL * (1.0-aWet)); + + iirSampleAR = (iirSampleAR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleAR * aWet) + (inputSampleR * (1.0-aWet)); + } + if (bWet > 0.0) { + iirSampleCL = (iirSampleCL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleCL * bWet) + (inputSampleL * (1.0-bWet)); + + iirSampleCR = (iirSampleCR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleCR * bWet) + (inputSampleR * (1.0-bWet)); + } + if (cWet > 0.0) { + iirSampleEL = (iirSampleEL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleEL * cWet) + (inputSampleL * (1.0-cWet)); + + iirSampleER = (iirSampleER * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleER * cWet) + (inputSampleR * (1.0-cWet)); + } + if (dWet > 0.0) { + iirSampleGL = (iirSampleGL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleGL * dWet) + (inputSampleL * (1.0-dWet)); + + iirSampleGR = (iirSampleGR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleGR * dWet) + (inputSampleR * (1.0-dWet)); + } + } + else + { + if (aWet > 0.0) { + iirSampleBL = (iirSampleBL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleBL * aWet) + (inputSampleL * (1.0-aWet)); + + iirSampleBR = (iirSampleBR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleBR * aWet) + (inputSampleR * (1.0-aWet)); + } + if (bWet > 0.0) { + iirSampleDL = (iirSampleDL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleDL * bWet) + (inputSampleL * (1.0-bWet)); + + iirSampleDR = (iirSampleDR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleDR * bWet) + (inputSampleR * (1.0-bWet)); + } + if (cWet > 0.0) { + iirSampleFL = (iirSampleFL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleFL * cWet) + (inputSampleL * (1.0-cWet)); + + iirSampleFR = (iirSampleFR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleFR * cWet) + (inputSampleR * (1.0-cWet)); + } + if (dWet > 0.0) { + iirSampleHL = (iirSampleHL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleHL * dWet) + (inputSampleL * (1.0-dWet)); + + iirSampleHR = (iirSampleHR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleHR * dWet) + (inputSampleR * (1.0-dWet)); + } + } + + if (wet !=1.0) { + inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet)); + inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet)); + } + //Dry/Wet control, defaults to the last slider + fpFlip = !fpFlip; + + //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 Lowpass2::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames) +{ + double* in1 = inputs[0]; + double* in2 = inputs[1]; + double* out1 = outputs[0]; + double* out2 = outputs[1]; + + double iirAmount = A; + double tight = (B*2.0)-1.0; + iirAmount += fabs(tight); + if (iirAmount < 0.0000001) iirAmount = 0.0000001; + if (iirAmount > 1) iirAmount = 1; + if (tight < 0.0) tight *= 0.5; + double offsetL; + double offsetR; + double aWet = 1.0; + double bWet = 1.0; + double cWet = 1.0; + double dWet = C*4.0; + //four-stage wet/dry control using progressive stages that bypass when not engaged + if (dWet < 1.0) {aWet = dWet; bWet = 0.0; cWet = 0.0; dWet = 0.0;} + else if (dWet < 2.0) {bWet = dWet - 1.0; cWet = 0.0; dWet = 0.0;} + else if (dWet < 3.0) {cWet = dWet - 2.0; dWet = 0.0;} + else {dWet -= 3.0;} + //this is one way to make a little set of dry/wet stages that are successively added to the + //output as the control is turned up. Each one independently goes from 0-1 and stays at 1 + //beyond that point: this is a way to progressively add a 'black box' sound processing + //which lets you fall through to simpler processing at lower settings. + double wet = D; + + while (--sampleFrames >= 0) + { + long double inputSampleL = *in1; + long double inputSampleR = *in2; + + static int noisesourceL = 0; + static int noisesourceR = 850010; + int residue; + double applyresidue; + + noisesourceL = noisesourceL % 1700021; noisesourceL++; + residue = noisesourceL * noisesourceL; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleL += applyresidue; + if (inputSampleL<1.2e-38 && -inputSampleL<1.2e-38) { + inputSampleL -= applyresidue; + } + + noisesourceR = noisesourceR % 1700021; noisesourceR++; + residue = noisesourceR * noisesourceR; + residue = residue % 170003; residue *= residue; + residue = residue % 17011; residue *= residue; + residue = residue % 1709; residue *= residue; + residue = residue % 173; residue *= residue; + residue = residue % 17; + applyresidue = residue; + applyresidue *= 0.00000001; + applyresidue *= 0.00000001; + inputSampleR += applyresidue; + if (inputSampleR<1.2e-38 && -inputSampleR<1.2e-38) { + inputSampleR -= applyresidue; + } + //for live air, we always apply the dither noise. Then, if our result is + //effectively digital black, we'll subtract it again. We want a 'air' hiss + long double drySampleL = inputSampleL; + long double drySampleR = inputSampleR; + + if (tight > 0) offsetL = (1 - tight) + (fabs(inputSampleL)*tight); + else offsetL = (1 + tight) + ((1-fabs(inputSampleL))*tight); + if (offsetL < 0.0000001) offsetL = 0.0000001; if (offsetL > 1) offsetL = 1; + + if (tight > 0) offsetR = (1 - tight) + (fabs(inputSampleR)*tight); + else offsetR = (1 + tight) + ((1-fabs(inputSampleR))*tight); + if (offsetR < 0.0000001) offsetR = 0.0000001; if (offsetR > 1) offsetR = 1; + + if (fpFlip) + { + if (aWet > 0.0) { + iirSampleAL = (iirSampleAL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleAL * aWet) + (inputSampleL * (1.0-aWet)); + + iirSampleAR = (iirSampleAR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleAR * aWet) + (inputSampleR * (1.0-aWet)); + } + if (bWet > 0.0) { + iirSampleCL = (iirSampleCL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleCL * bWet) + (inputSampleL * (1.0-bWet)); + + iirSampleCR = (iirSampleCR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleCR * bWet) + (inputSampleR * (1.0-bWet)); + } + if (cWet > 0.0) { + iirSampleEL = (iirSampleEL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleEL * cWet) + (inputSampleL * (1.0-cWet)); + + iirSampleER = (iirSampleER * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleER * cWet) + (inputSampleR * (1.0-cWet)); + } + if (dWet > 0.0) { + iirSampleGL = (iirSampleGL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleGL * dWet) + (inputSampleL * (1.0-dWet)); + + iirSampleGR = (iirSampleGR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleGR * dWet) + (inputSampleR * (1.0-dWet)); + } + } + else + { + if (aWet > 0.0) { + iirSampleBL = (iirSampleBL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleBL * aWet) + (inputSampleL * (1.0-aWet)); + + iirSampleBR = (iirSampleBR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleBR * aWet) + (inputSampleR * (1.0-aWet)); + } + if (bWet > 0.0) { + iirSampleDL = (iirSampleDL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleDL * bWet) + (inputSampleL * (1.0-bWet)); + + iirSampleDR = (iirSampleDR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleDR * bWet) + (inputSampleR * (1.0-bWet)); + } + if (cWet > 0.0) { + iirSampleFL = (iirSampleFL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleFL * cWet) + (inputSampleL * (1.0-cWet)); + + iirSampleFR = (iirSampleFR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleFR * cWet) + (inputSampleR * (1.0-cWet)); + } + if (dWet > 0.0) { + iirSampleHL = (iirSampleHL * (1 - (offsetL * iirAmount))) + (inputSampleL * (offsetL * iirAmount)); + inputSampleL = (iirSampleHL * dWet) + (inputSampleL * (1.0-dWet)); + + iirSampleHR = (iirSampleHR * (1 - (offsetR * iirAmount))) + (inputSampleR * (offsetR * iirAmount)); + inputSampleR = (iirSampleHR * dWet) + (inputSampleR * (1.0-dWet)); + } + } + + if (wet !=1.0) { + inputSampleL = (inputSampleL * wet) + (drySampleL * (1.0-wet)); + inputSampleR = (inputSampleR * wet) + (drySampleR * (1.0-wet)); + } + //Dry/Wet control, defaults to the last slider + fpFlip = !fpFlip; + + //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++; + } +} |