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316 lines
13 KiB
C++
Executable file
316 lines
13 KiB
C++
Executable file
/* ========================================
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* YBandpass - YBandpass.h
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* Copyright (c) 2016 airwindows, Airwindows uses the MIT license
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* ======================================== */
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#ifndef __YBandpass_H
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#include "YBandpass.h"
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#endif
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void YBandpass::processReplacing(float **inputs, float **outputs, VstInt32 sampleFrames)
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{
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float* in1 = inputs[0];
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float* in2 = inputs[1];
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float* out1 = outputs[0];
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float* out2 = outputs[1];
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VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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inTrimA = inTrimB;
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inTrimB = A*10.0;
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biquad[biq_freq] = pow(B,3)*20000.0;
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if (biquad[biq_freq] < 15.0) biquad[biq_freq] = 15.0;
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biquad[biq_freq] /= getSampleRate();
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biquad[biq_reso] = (pow(C,2)*15.0)+0.5571;
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biquad[biq_aA0] = biquad[biq_aB0];
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//biquad[biq_aA1] = biquad[biq_aB1];
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biquad[biq_aA2] = biquad[biq_aB2];
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biquad[biq_bA1] = biquad[biq_bB1];
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biquad[biq_bA2] = biquad[biq_bB2];
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//previous run through the buffer is still in the filter, so we move it
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//to the A section and now it's the new starting point.
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double K = tan(M_PI * biquad[biq_freq]);
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double norm = 1.0 / (1.0 + K / biquad[biq_reso] + K * K);
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biquad[biq_aB0] = K / biquad[biq_reso] * norm;
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//biquad[biq_aB1] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply
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biquad[biq_aB2] = -biquad[biq_aB0];
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biquad[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquad[biq_bB2] = (1.0 - K / biquad[biq_reso] + K * K) * norm;
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//for the coefficient-interpolated biquad filter
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powFactorA = powFactorB;
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powFactorB = pow(D+0.9,4);
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//1.0 == target neutral
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outTrimA = outTrimB;
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outTrimB = E;
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double wet = F;
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fixA[fix_freq] = fixB[fix_freq] = 20000.0 / getSampleRate();
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fixA[fix_reso] = fixB[fix_reso] = 0.7071; //butterworth Q
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K = tan(M_PI * fixA[fix_freq]);
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norm = 1.0 / (1.0 + K / fixA[fix_reso] + K * K);
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fixA[fix_a0] = fixB[fix_a0] = K * K * norm;
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fixA[fix_a1] = fixB[fix_a1] = 2.0 * fixA[fix_a0];
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fixA[fix_a2] = fixB[fix_a2] = fixA[fix_a0];
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fixA[fix_b1] = fixB[fix_b1] = 2.0 * (K * K - 1.0) * norm;
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fixA[fix_b2] = fixB[fix_b2] = (1.0 - K / fixA[fix_reso] + K * K) * norm;
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//for the fixed-position biquad filter
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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double temp = (double)sampleFrames/inFramesToProcess;
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biquad[biq_a0] = (biquad[biq_aA0]*temp)+(biquad[biq_aB0]*(1.0-temp));
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//biquad[biq_a1] = (biquad[biq_aA1]*temp)+(biquad[biq_aB1]*(1.0-temp));
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biquad[biq_a2] = (biquad[biq_aA2]*temp)+(biquad[biq_aB2]*(1.0-temp));
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biquad[biq_b1] = (biquad[biq_bA1]*temp)+(biquad[biq_bB1]*(1.0-temp));
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biquad[biq_b2] = (biquad[biq_bA2]*temp)+(biquad[biq_bB2]*(1.0-temp));
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//this is the interpolation code for the biquad
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double powFactor = (powFactorA*temp)+(powFactorB*(1.0-temp));
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double inTrim = (inTrimA*temp)+(inTrimB*(1.0-temp));
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double outTrim = (outTrimA*temp)+(outTrimB*(1.0-temp));
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inputSampleL *= inTrim;
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inputSampleR *= inTrim;
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temp = (inputSampleL * fixA[fix_a0]) + fixA[fix_sL1];
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fixA[fix_sL1] = (inputSampleL * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sL2];
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fixA[fix_sL2] = (inputSampleL * fixA[fix_a2]) - (temp * fixA[fix_b2]);
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inputSampleL = temp; //fixed biquad filtering ultrasonics
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temp = (inputSampleR * fixA[fix_a0]) + fixA[fix_sR1];
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fixA[fix_sR1] = (inputSampleR * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sR2];
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fixA[fix_sR2] = (inputSampleR * fixA[fix_a2]) - (temp * fixA[fix_b2]);
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inputSampleR = temp; //fixed biquad filtering ultrasonics
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//encode/decode courtesy of torridgristle under the MIT license
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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else if (inputSampleL > 0.0) inputSampleL = 1.0 - pow(1.0-inputSampleL,powFactor);
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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else if (inputSampleL < 0.0) inputSampleL = -1.0 + pow(1.0+inputSampleL,powFactor);
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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else if (inputSampleR > 0.0) inputSampleR = 1.0 - pow(1.0-inputSampleR,powFactor);
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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else if (inputSampleR < 0.0) inputSampleR = -1.0 + pow(1.0+inputSampleR,powFactor);
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temp = (inputSampleL * biquad[biq_a0]) + biquad[biq_sL1];
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biquad[biq_sL1] = -(temp * biquad[biq_b1]) + biquad[biq_sL2];
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biquad[biq_sL2] = (inputSampleL * biquad[biq_a2]) - (temp * biquad[biq_b2]);
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inputSampleL = temp; //coefficient interpolating biquad filter
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temp = (inputSampleR * biquad[biq_a0]) + biquad[biq_sR1];
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biquad[biq_sR1] = -(temp * biquad[biq_b1]) + biquad[biq_sR2];
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biquad[biq_sR2] = (inputSampleR * biquad[biq_a2]) - (temp * biquad[biq_b2]);
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inputSampleR = temp; //coefficient interpolating biquad filter
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//encode/decode courtesy of torridgristle under the MIT license
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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else if (inputSampleL > 0.0) inputSampleL = 1.0 - pow(1.0-inputSampleL,(1.0/powFactor));
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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else if (inputSampleL < 0.0) inputSampleL = -1.0 + pow(1.0+inputSampleL,(1.0/powFactor));
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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else if (inputSampleR > 0.0) inputSampleR = 1.0 - pow(1.0-inputSampleR,(1.0/powFactor));
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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else if (inputSampleR < 0.0) inputSampleR = -1.0 + pow(1.0+inputSampleR,(1.0/powFactor));
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inputSampleL *= outTrim;
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inputSampleR *= outTrim;
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temp = (inputSampleL * fixB[fix_a0]) + fixB[fix_sL1];
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fixB[fix_sL1] = (inputSampleL * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sL2];
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fixB[fix_sL2] = (inputSampleL * fixB[fix_a2]) - (temp * fixB[fix_b2]);
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inputSampleL = temp; //fixed biquad filtering ultrasonics
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temp = (inputSampleR * fixB[fix_a0]) + fixB[fix_sR1];
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fixB[fix_sR1] = (inputSampleR * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sR2];
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fixB[fix_sR2] = (inputSampleR * fixB[fix_a2]) - (temp * fixB[fix_b2]);
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inputSampleR = temp; //fixed biquad filtering ultrasonics
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if (wet < 1.0) {
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inputSampleL = (inputSampleL*wet) + (drySampleL*(1.0-wet));
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inputSampleR = (inputSampleR*wet) + (drySampleR*(1.0-wet));
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}
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//begin 32 bit stereo floating point dither
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int expon; frexpf((float)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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frexpf((float)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 5.5e-36l * pow(2,expon+62));
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//end 32 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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void YBandpass::processDoubleReplacing(double **inputs, double **outputs, VstInt32 sampleFrames)
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{
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double* in1 = inputs[0];
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double* in2 = inputs[1];
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double* out1 = outputs[0];
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double* out2 = outputs[1];
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VstInt32 inFramesToProcess = sampleFrames; //vst doesn't give us this as a separate variable so we'll make it
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double overallscale = 1.0;
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overallscale /= 44100.0;
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overallscale *= getSampleRate();
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inTrimA = inTrimB;
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inTrimB = A*10.0;
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biquad[biq_freq] = pow(B,3)*20000.0;
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if (biquad[biq_freq] < 15.0) biquad[biq_freq] = 15.0;
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biquad[biq_freq] /= getSampleRate();
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biquad[biq_reso] = (pow(C,2)*15.0)+0.5571;
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biquad[biq_aA0] = biquad[biq_aB0];
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//biquad[biq_aA1] = biquad[biq_aB1];
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biquad[biq_aA2] = biquad[biq_aB2];
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biquad[biq_bA1] = biquad[biq_bB1];
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biquad[biq_bA2] = biquad[biq_bB2];
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//previous run through the buffer is still in the filter, so we move it
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//to the A section and now it's the new starting point.
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double K = tan(M_PI * biquad[biq_freq]);
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double norm = 1.0 / (1.0 + K / biquad[biq_reso] + K * K);
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biquad[biq_aB0] = K / biquad[biq_reso] * norm;
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//biquad[biq_aB1] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply
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biquad[biq_aB2] = -biquad[biq_aB0];
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biquad[biq_bB1] = 2.0 * (K * K - 1.0) * norm;
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biquad[biq_bB2] = (1.0 - K / biquad[biq_reso] + K * K) * norm;
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//for the coefficient-interpolated biquad filter
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powFactorA = powFactorB;
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powFactorB = pow(D+0.9,4);
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//1.0 == target neutral
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outTrimA = outTrimB;
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outTrimB = E;
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double wet = F;
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fixA[fix_freq] = fixB[fix_freq] = 20000.0 / getSampleRate();
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fixA[fix_reso] = fixB[fix_reso] = 0.7071; //butterworth Q
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K = tan(M_PI * fixA[fix_freq]);
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norm = 1.0 / (1.0 + K / fixA[fix_reso] + K * K);
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fixA[fix_a0] = fixB[fix_a0] = K * K * norm;
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fixA[fix_a1] = fixB[fix_a1] = 2.0 * fixA[fix_a0];
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fixA[fix_a2] = fixB[fix_a2] = fixA[fix_a0];
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fixA[fix_b1] = fixB[fix_b1] = 2.0 * (K * K - 1.0) * norm;
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fixA[fix_b2] = fixB[fix_b2] = (1.0 - K / fixA[fix_reso] + K * K) * norm;
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//for the fixed-position biquad filter
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while (--sampleFrames >= 0)
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{
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double inputSampleL = *in1;
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double inputSampleR = *in2;
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if (fabs(inputSampleL)<1.18e-23) inputSampleL = fpdL * 1.18e-17;
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if (fabs(inputSampleR)<1.18e-23) inputSampleR = fpdR * 1.18e-17;
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double drySampleL = inputSampleL;
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double drySampleR = inputSampleR;
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double temp = (double)sampleFrames/inFramesToProcess;
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biquad[biq_a0] = (biquad[biq_aA0]*temp)+(biquad[biq_aB0]*(1.0-temp));
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//biquad[biq_a1] = (biquad[biq_aA1]*temp)+(biquad[biq_aB1]*(1.0-temp));
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biquad[biq_a2] = (biquad[biq_aA2]*temp)+(biquad[biq_aB2]*(1.0-temp));
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biquad[biq_b1] = (biquad[biq_bA1]*temp)+(biquad[biq_bB1]*(1.0-temp));
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biquad[biq_b2] = (biquad[biq_bA2]*temp)+(biquad[biq_bB2]*(1.0-temp));
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//this is the interpolation code for the biquad
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double powFactor = (powFactorA*temp)+(powFactorB*(1.0-temp));
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double inTrim = (inTrimA*temp)+(inTrimB*(1.0-temp));
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double outTrim = (outTrimA*temp)+(outTrimB*(1.0-temp));
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inputSampleL *= inTrim;
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inputSampleR *= inTrim;
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temp = (inputSampleL * fixA[fix_a0]) + fixA[fix_sL1];
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fixA[fix_sL1] = (inputSampleL * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sL2];
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fixA[fix_sL2] = (inputSampleL * fixA[fix_a2]) - (temp * fixA[fix_b2]);
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inputSampleL = temp; //fixed biquad filtering ultrasonics
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temp = (inputSampleR * fixA[fix_a0]) + fixA[fix_sR1];
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fixA[fix_sR1] = (inputSampleR * fixA[fix_a1]) - (temp * fixA[fix_b1]) + fixA[fix_sR2];
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fixA[fix_sR2] = (inputSampleR * fixA[fix_a2]) - (temp * fixA[fix_b2]);
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inputSampleR = temp; //fixed biquad filtering ultrasonics
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//encode/decode courtesy of torridgristle under the MIT license
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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else if (inputSampleL > 0.0) inputSampleL = 1.0 - pow(1.0-inputSampleL,powFactor);
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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else if (inputSampleL < 0.0) inputSampleL = -1.0 + pow(1.0+inputSampleL,powFactor);
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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else if (inputSampleR > 0.0) inputSampleR = 1.0 - pow(1.0-inputSampleR,powFactor);
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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else if (inputSampleR < 0.0) inputSampleR = -1.0 + pow(1.0+inputSampleR,powFactor);
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temp = (inputSampleL * biquad[biq_a0]) + biquad[biq_sL1];
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biquad[biq_sL1] = -(temp * biquad[biq_b1]) + biquad[biq_sL2];
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biquad[biq_sL2] = (inputSampleL * biquad[biq_a2]) - (temp * biquad[biq_b2]);
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inputSampleL = temp; //coefficient interpolating biquad filter
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temp = (inputSampleR * biquad[biq_a0]) + biquad[biq_sR1];
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biquad[biq_sR1] = -(temp * biquad[biq_b1]) + biquad[biq_sR2];
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biquad[biq_sR2] = (inputSampleR * biquad[biq_a2]) - (temp * biquad[biq_b2]);
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inputSampleR = temp; //coefficient interpolating biquad filter
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//encode/decode courtesy of torridgristle under the MIT license
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if (inputSampleL > 1.0) inputSampleL = 1.0;
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else if (inputSampleL > 0.0) inputSampleL = 1.0 - pow(1.0-inputSampleL,(1.0/powFactor));
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if (inputSampleL < -1.0) inputSampleL = -1.0;
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else if (inputSampleL < 0.0) inputSampleL = -1.0 + pow(1.0+inputSampleL,(1.0/powFactor));
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if (inputSampleR > 1.0) inputSampleR = 1.0;
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else if (inputSampleR > 0.0) inputSampleR = 1.0 - pow(1.0-inputSampleR,(1.0/powFactor));
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if (inputSampleR < -1.0) inputSampleR = -1.0;
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else if (inputSampleR < 0.0) inputSampleR = -1.0 + pow(1.0+inputSampleR,(1.0/powFactor));
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inputSampleL *= outTrim;
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inputSampleR *= outTrim;
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temp = (inputSampleL * fixB[fix_a0]) + fixB[fix_sL1];
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fixB[fix_sL1] = (inputSampleL * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sL2];
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fixB[fix_sL2] = (inputSampleL * fixB[fix_a2]) - (temp * fixB[fix_b2]);
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inputSampleL = temp; //fixed biquad filtering ultrasonics
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temp = (inputSampleR * fixB[fix_a0]) + fixB[fix_sR1];
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fixB[fix_sR1] = (inputSampleR * fixB[fix_a1]) - (temp * fixB[fix_b1]) + fixB[fix_sR2];
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fixB[fix_sR2] = (inputSampleR * fixB[fix_a2]) - (temp * fixB[fix_b2]);
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inputSampleR = temp; //fixed biquad filtering ultrasonics
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if (wet < 1.0) {
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inputSampleL = (inputSampleL*wet) + (drySampleL*(1.0-wet));
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inputSampleR = (inputSampleR*wet) + (drySampleR*(1.0-wet));
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}
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//begin 64 bit stereo floating point dither
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//int expon; frexp((double)inputSampleL, &expon);
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fpdL ^= fpdL << 13; fpdL ^= fpdL >> 17; fpdL ^= fpdL << 5;
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//inputSampleL += ((double(fpdL)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//frexp((double)inputSampleR, &expon);
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fpdR ^= fpdR << 13; fpdR ^= fpdR >> 17; fpdR ^= fpdR << 5;
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//inputSampleR += ((double(fpdR)-uint32_t(0x7fffffff)) * 1.1e-44l * pow(2,expon+62));
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//end 64 bit stereo floating point dither
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*out1 = inputSampleL;
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*out2 = inputSampleR;
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in1++;
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in2++;
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out1++;
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out2++;
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}
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}
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