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Diffstat (limited to 'plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp')
| -rwxr-xr-x | plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp b/plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp new file mode 100755 index 0000000..a09429b --- /dev/null +++ b/plugins/LinuxVST/src/SoftGate/SoftGateProc.cpp @@ -0,0 +1,146 @@ +/* ======================================== + * SoftGate - SoftGate.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __SoftGate_H +#include "SoftGate.h" +#endif + +void SoftGate::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 threshold = pow(A,6); + double recovery = pow((B*0.5),6); + recovery /= overallscale; + double baseline = pow(C,6); + double invrec = 1.0 - recovery; + + 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; + + storedL[1] = storedL[0]; + storedL[0] = inputSampleL; + diffL = storedL[0] - storedL[1]; + + storedR[1] = storedR[0]; + storedR[0] = inputSampleR; + diffR = storedR[0] - storedR[1]; + + if (gate > 0) {gate = ((gate-baseline) * invrec) + baseline;} + + if ((fabs(diffR) > threshold) || (fabs(diffL) > threshold)) {gate = 1.1;} + else {gate = (gate * invrec); if (threshold > 0) {gate += ((fabs(inputSampleL)/threshold) * recovery);gate += ((fabs(inputSampleR)/threshold) * recovery);}} + + if (gate < 0) gate = 0; + + if (gate < 1.0) + { + storedL[0] = storedL[1] + (diffL * gate); + storedR[0] = storedR[1] + (diffR * gate); + } + + if (gate < 1) { + inputSampleL = (inputSampleL * gate) + (storedL[0] * (1.0-gate)); + inputSampleR = (inputSampleR * gate) + (storedR[0] * (1.0-gate)); + } + + //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 SoftGate::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 threshold = pow(A,6); + double recovery = pow((B*0.5),6); + recovery /= overallscale; + double baseline = pow(C,6); + double invrec = 1.0 - recovery; + + 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; + + storedL[1] = storedL[0]; + storedL[0] = inputSampleL; + diffL = storedL[0] - storedL[1]; + + storedR[1] = storedR[0]; + storedR[0] = inputSampleR; + diffR = storedR[0] - storedR[1]; + + if (gate > 0) {gate = ((gate-baseline) * invrec) + baseline;} + + if ((fabs(diffR) > threshold) || (fabs(diffL) > threshold)) {gate = 1.1;} + else {gate = (gate * invrec); if (threshold > 0) {gate += ((fabs(inputSampleL)/threshold) * recovery);gate += ((fabs(inputSampleR)/threshold) * recovery);}} + + if (gate < 0) gate = 0; + + if (gate < 1.0) + { + storedL[0] = storedL[1] + (diffL * gate); + storedR[0] = storedR[1] + (diffR * gate); + } + + if (gate < 1) { + inputSampleL = (inputSampleL * gate) + (storedL[0] * (1.0-gate)); + inputSampleR = (inputSampleR * gate) + (storedR[0] * (1.0-gate)); + } + + //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++; + } +} |