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author | Chris Johnson <jinx6568@sover.net> | 2019-09-22 22:52:35 -0400 |
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committer | Chris Johnson <jinx6568@sover.net> | 2019-09-22 22:52:35 -0400 |
commit | 8209ad4ceba452b470c1d6c347612701c4901dec (patch) | |
tree | 212ad0de51cfc391521001be6772b05dcb7d1882 /plugins/WinVST/Biquad2/Biquad2Proc.cpp | |
parent | 25083c28de46d5665fd0f10349f004d17a43df06 (diff) | |
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Biquad2
Diffstat (limited to 'plugins/WinVST/Biquad2/Biquad2Proc.cpp')
-rwxr-xr-x | plugins/WinVST/Biquad2/Biquad2Proc.cpp | 432 |
1 files changed, 432 insertions, 0 deletions
diff --git a/plugins/WinVST/Biquad2/Biquad2Proc.cpp b/plugins/WinVST/Biquad2/Biquad2Proc.cpp new file mode 100755 index 0000000..837a072 --- /dev/null +++ b/plugins/WinVST/Biquad2/Biquad2Proc.cpp @@ -0,0 +1,432 @@ +/* ======================================== + * Biquad2 - Biquad2.h + * Copyright (c) 2016 airwindows, All rights reserved + * ======================================== */ + +#ifndef __Biquad2_H +#include "Biquad2.h" +#endif + +void Biquad2::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 type = ceil((A*3.999)+0.00001); + + double average = B*B; + double frequencytarget = average*0.39; //biquad[0], goes to 1.0 + frequencytarget /= overallscale; + if (frequencytarget < 0.0015/overallscale) frequencytarget = 0.0015/overallscale; + double resonancetarget = (C*C*49.99)+0.01; //biquad[1], goes to 50.0 + if (resonancetarget < 1.0) resonancetarget = 1.0; + double outputtarget = D; //scaled to res + if (type < 3) outputtarget /= sqrt(resonancetarget); + double wettarget = (E*2.0)-1.0; //wet, goes -1.0 to 1.0 + + //biquad contains these values: + //[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist + //[1] is resonance, 0.7071 is Butterworth. Also can't be zero + //[2] is a0 but you need distinct ones for additional biquad instances so it's here + //[3] is a1 but you need distinct ones for additional biquad instances so it's here + //[4] is a2 but you need distinct ones for additional biquad instances so it's here + //[5] is b1 but you need distinct ones for additional biquad instances so it's here + //[6] is b2 but you need distinct ones for additional biquad instances so it's here + //[7] is a stored delayed sample (freq and res are stored so you can move them sample by sample) + //[8] is a stored delayed sample (you have to include the coefficient making code if you do that) + //[9] is a stored delayed sample (you have to include the coefficient making code if you do that) + //[10] is a stored delayed sample (you have to include the coefficient making code if you do that) + double K = tan(M_PI * biquad[0]); + double norm = 1.0 / (1.0 + K / biquad[1] + K * K); + //finished setting up biquad + + average = (1.0-average)*10.0; //max taps is 10, and low settings use more + + if (type == 1 || type == 3) average = 1.0; + + double gain = average; + if (gain > 1.0) {f[0] = 1.0; gain -= 1.0;} else {f[0] = gain; gain = 0.0;} + if (gain > 1.0) {f[1] = 1.0; gain -= 1.0;} else {f[1] = gain; gain = 0.0;} + if (gain > 1.0) {f[2] = 1.0; gain -= 1.0;} else {f[2] = gain; gain = 0.0;} + if (gain > 1.0) {f[3] = 1.0; gain -= 1.0;} else {f[3] = gain; gain = 0.0;} + if (gain > 1.0) {f[4] = 1.0; gain -= 1.0;} else {f[4] = gain; gain = 0.0;} + if (gain > 1.0) {f[5] = 1.0; gain -= 1.0;} else {f[5] = gain; gain = 0.0;} + if (gain > 1.0) {f[6] = 1.0; gain -= 1.0;} else {f[6] = gain; gain = 0.0;} + if (gain > 1.0) {f[7] = 1.0; gain -= 1.0;} else {f[7] = gain; gain = 0.0;} + if (gain > 1.0) {f[8] = 1.0; gain -= 1.0;} else {f[8] = gain; gain = 0.0;} + if (gain > 1.0) {f[9] = 1.0; gain -= 1.0;} else {f[9] = gain; gain = 0.0;} + //there, now we have a neat little moving average with remainders + + if (average < 1.0) average = 1.0; + f[0] /= average; + f[1] /= average; + f[2] /= average; + f[3] /= average; + f[4] /= average; + f[5] /= average; + f[6] /= average; + f[7] /= average; + f[8] /= average; + f[9] /= average; + //and now it's neatly scaled, too + //finished setting up average + + 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; + + double chasespeed = 50000; + if (frequencychase < frequencytarget) chasespeed = 500000; + chasespeed /= resonancechase; + chasespeed *= overallscale; + + frequencychase = (((frequencychase*chasespeed)+frequencytarget)/(chasespeed+1.0)); + + double fasterchase = 1000 * overallscale; + resonancechase = (((resonancechase*fasterchase)+resonancetarget)/(fasterchase+1.0)); + outputchase = (((outputchase*fasterchase)+outputtarget)/(fasterchase+1.0)); + wetchase = (((wetchase*fasterchase)+wettarget)/(fasterchase+1.0)); + if (biquad[0] != frequencychase) {biquad[0] = frequencychase; K = tan(M_PI * biquad[0]);} + if (biquad[1] != resonancechase) {biquad[1] = resonancechase; norm = 1.0 / (1.0 + K / biquad[1] + K * K);} + + if (type == 1) { //lowpass + biquad[2] = K * K * norm; + biquad[3] = 2.0 * biquad[2]; + biquad[4] = biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + } + + if (type == 2) { //highpass + biquad[2] = norm; + biquad[3] = -2.0 * biquad[2]; + biquad[4] = biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + } + + if (type == 3) { //bandpass + biquad[2] = K / biquad[1] * norm; + biquad[3] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply + biquad[4] = -biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + } + + if (type == 4) { //notch + biquad[2] = (1.0 + K * K) * norm; + biquad[3] = 2.0 * (K * K - 1) * norm; + biquad[4] = biquad[2]; + biquad[5] = biquad[3]; + } + + biquad[6] = (1.0 - K / biquad[1] + K * K) * norm; + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //encode Console5: good cleanness + + long double outSampleL = biquad[2]*inputSampleL+biquad[3]*biquad[7]+biquad[4]*biquad[8]-biquad[5]*biquad[9]-biquad[6]*biquad[10]; + biquad[8] = biquad[7]; biquad[7] = inputSampleL; inputSampleL = outSampleL; biquad[10] = biquad[9]; biquad[9] = inputSampleL; //DF1 left + + long double outSampleR = biquad[2]*inputSampleR+biquad[3]*biquad[11]+biquad[4]*biquad[12]-biquad[5]*biquad[13]-biquad[6]*biquad[14]; + biquad[12] = biquad[11]; biquad[11] = inputSampleR; inputSampleR = outSampleR; biquad[14] = biquad[13]; biquad[13] = inputSampleR; //DF1 right + + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + + bL[9] = bL[8]; bL[8] = bL[7]; bL[7] = bL[6]; bL[6] = bL[5]; + bL[5] = bL[4]; bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1]; + bL[1] = bL[0]; bL[0] = inputSampleL; + + bR[9] = bR[8]; bR[8] = bR[7]; bR[7] = bR[6]; bR[6] = bR[5]; + bR[5] = bR[4]; bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1]; + bR[1] = bR[0]; bR[0] = inputSampleR; + + inputSampleL *= f[0]; + inputSampleL += (bL[1] * f[1]); + inputSampleL += (bL[2] * f[2]); + inputSampleL += (bL[3] * f[3]); + inputSampleL += (bL[4] * f[4]); + inputSampleL += (bL[5] * f[5]); + inputSampleL += (bL[6] * f[6]); + inputSampleL += (bL[7] * f[7]); + inputSampleL += (bL[8] * f[8]); + inputSampleL += (bL[9] * f[9]); //intense averaging on deeper cutoffs + + inputSampleR *= f[0]; + inputSampleR += (bR[1] * f[1]); + inputSampleR += (bR[2] * f[2]); + inputSampleR += (bR[3] * f[3]); + inputSampleR += (bR[4] * f[4]); + inputSampleR += (bR[5] * f[5]); + inputSampleR += (bR[6] * f[6]); + inputSampleR += (bR[7] * f[7]); + inputSampleR += (bR[8] * f[8]); + inputSampleR += (bR[9] * f[9]); //intense averaging on deeper cutoffs + + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + //without this, you can get a NaN condition where it spits out DC offset at full blast! + inputSampleL = asin(inputSampleL); + inputSampleR = asin(inputSampleR); + //amplitude aspect + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + //and then Console5 will spit out overs if you let it + + if (outputchase < 1.0) { + inputSampleL *= outputchase; + inputSampleR *= outputchase; + } + + if (wetchase < 1.0) { + inputSampleL = (inputSampleL*wetchase) + (drySampleL*(1.0-fabs(wetchase))); + inputSampleR = (inputSampleR*wetchase) + (drySampleR*(1.0-fabs(wetchase))); + //inv/dry/wet lets us turn LP into HP and band into notch + } + + //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 Biquad2::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 type = ceil((A*3.999)+0.00001); + + double average = B*B; + double frequencytarget = average*0.39; //biquad[0], goes to 1.0 + frequencytarget /= overallscale; + if (frequencytarget < 0.0015/overallscale) frequencytarget = 0.0015/overallscale; + double resonancetarget = (C*C*49.99)+0.01; //biquad[1], goes to 50.0 + if (resonancetarget < 1.0) resonancetarget = 1.0; + double outputtarget = D; //scaled to res + if (type < 3) outputtarget /= sqrt(resonancetarget); + double wettarget = (E*2.0)-1.0; //wet, goes -1.0 to 1.0 + + //biquad contains these values: + //[0] is frequency: 0.000001 to 0.499999 is near-zero to near-Nyquist + //[1] is resonance, 0.7071 is Butterworth. Also can't be zero + //[2] is a0 but you need distinct ones for additional biquad instances so it's here + //[3] is a1 but you need distinct ones for additional biquad instances so it's here + //[4] is a2 but you need distinct ones for additional biquad instances so it's here + //[5] is b1 but you need distinct ones for additional biquad instances so it's here + //[6] is b2 but you need distinct ones for additional biquad instances so it's here + //[7] is a stored delayed sample (freq and res are stored so you can move them sample by sample) + //[8] is a stored delayed sample (you have to include the coefficient making code if you do that) + //[9] is a stored delayed sample (you have to include the coefficient making code if you do that) + //[10] is a stored delayed sample (you have to include the coefficient making code if you do that) + double K = tan(M_PI * biquad[0]); + double norm = 1.0 / (1.0 + K / biquad[1] + K * K); + //finished setting up biquad + + average = (1.0-average)*10.0; //max taps is 10, and low settings use more + + if (type == 1 || type == 3) average = 1.0; + + double gain = average; + if (gain > 1.0) {f[0] = 1.0; gain -= 1.0;} else {f[0] = gain; gain = 0.0;} + if (gain > 1.0) {f[1] = 1.0; gain -= 1.0;} else {f[1] = gain; gain = 0.0;} + if (gain > 1.0) {f[2] = 1.0; gain -= 1.0;} else {f[2] = gain; gain = 0.0;} + if (gain > 1.0) {f[3] = 1.0; gain -= 1.0;} else {f[3] = gain; gain = 0.0;} + if (gain > 1.0) {f[4] = 1.0; gain -= 1.0;} else {f[4] = gain; gain = 0.0;} + if (gain > 1.0) {f[5] = 1.0; gain -= 1.0;} else {f[5] = gain; gain = 0.0;} + if (gain > 1.0) {f[6] = 1.0; gain -= 1.0;} else {f[6] = gain; gain = 0.0;} + if (gain > 1.0) {f[7] = 1.0; gain -= 1.0;} else {f[7] = gain; gain = 0.0;} + if (gain > 1.0) {f[8] = 1.0; gain -= 1.0;} else {f[8] = gain; gain = 0.0;} + if (gain > 1.0) {f[9] = 1.0; gain -= 1.0;} else {f[9] = gain; gain = 0.0;} + //there, now we have a neat little moving average with remainders + + if (average < 1.0) average = 1.0; + f[0] /= average; + f[1] /= average; + f[2] /= average; + f[3] /= average; + f[4] /= average; + f[5] /= average; + f[6] /= average; + f[7] /= average; + f[8] /= average; + f[9] /= average; + //and now it's neatly scaled, too + //finished setting up average + + 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; + + double chasespeed = 50000; + if (frequencychase < frequencytarget) chasespeed = 500000; + chasespeed /= resonancechase; + chasespeed *= overallscale; + + frequencychase = (((frequencychase*chasespeed)+frequencytarget)/(chasespeed+1.0)); + + double fasterchase = 1000 * overallscale; + resonancechase = (((resonancechase*fasterchase)+resonancetarget)/(fasterchase+1.0)); + outputchase = (((outputchase*fasterchase)+outputtarget)/(fasterchase+1.0)); + wetchase = (((wetchase*fasterchase)+wettarget)/(fasterchase+1.0)); + if (biquad[0] != frequencychase) {biquad[0] = frequencychase; K = tan(M_PI * biquad[0]);} + if (biquad[1] != resonancechase) {biquad[1] = resonancechase; norm = 1.0 / (1.0 + K / biquad[1] + K * K);} + + if (type == 1) { //lowpass + biquad[2] = K * K * norm; + biquad[3] = 2.0 * biquad[2]; + biquad[4] = biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + } + + if (type == 2) { //highpass + biquad[2] = norm; + biquad[3] = -2.0 * biquad[2]; + biquad[4] = biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + } + + if (type == 3) { //bandpass + biquad[2] = K / biquad[1] * norm; + biquad[3] = 0.0; //bandpass can simplify the biquad kernel: leave out this multiply + biquad[4] = -biquad[2]; + biquad[5] = 2.0 * (K * K - 1.0) * norm; + } + + if (type == 4) { //notch + biquad[2] = (1.0 + K * K) * norm; + biquad[3] = 2.0 * (K * K - 1) * norm; + biquad[4] = biquad[2]; + biquad[5] = biquad[3]; + } + + biquad[6] = (1.0 - K / biquad[1] + K * K) * norm; + + inputSampleL = sin(inputSampleL); + inputSampleR = sin(inputSampleR); + //encode Console5: good cleanness + + long double outSampleL = biquad[2]*inputSampleL+biquad[3]*biquad[7]+biquad[4]*biquad[8]-biquad[5]*biquad[9]-biquad[6]*biquad[10]; + biquad[8] = biquad[7]; biquad[7] = inputSampleL; inputSampleL = outSampleL; biquad[10] = biquad[9]; biquad[9] = inputSampleL; //DF1 left + + long double outSampleR = biquad[2]*inputSampleR+biquad[3]*biquad[11]+biquad[4]*biquad[12]-biquad[5]*biquad[13]-biquad[6]*biquad[14]; + biquad[12] = biquad[11]; biquad[11] = inputSampleR; inputSampleR = outSampleR; biquad[14] = biquad[13]; biquad[13] = inputSampleR; //DF1 right + + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + + bL[9] = bL[8]; bL[8] = bL[7]; bL[7] = bL[6]; bL[6] = bL[5]; + bL[5] = bL[4]; bL[4] = bL[3]; bL[3] = bL[2]; bL[2] = bL[1]; + bL[1] = bL[0]; bL[0] = inputSampleL; + + bR[9] = bR[8]; bR[8] = bR[7]; bR[7] = bR[6]; bR[6] = bR[5]; + bR[5] = bR[4]; bR[4] = bR[3]; bR[3] = bR[2]; bR[2] = bR[1]; + bR[1] = bR[0]; bR[0] = inputSampleR; + + inputSampleL *= f[0]; + inputSampleL += (bL[1] * f[1]); + inputSampleL += (bL[2] * f[2]); + inputSampleL += (bL[3] * f[3]); + inputSampleL += (bL[4] * f[4]); + inputSampleL += (bL[5] * f[5]); + inputSampleL += (bL[6] * f[6]); + inputSampleL += (bL[7] * f[7]); + inputSampleL += (bL[8] * f[8]); + inputSampleL += (bL[9] * f[9]); //intense averaging on deeper cutoffs + + inputSampleR *= f[0]; + inputSampleR += (bR[1] * f[1]); + inputSampleR += (bR[2] * f[2]); + inputSampleR += (bR[3] * f[3]); + inputSampleR += (bR[4] * f[4]); + inputSampleR += (bR[5] * f[5]); + inputSampleR += (bR[6] * f[6]); + inputSampleR += (bR[7] * f[7]); + inputSampleR += (bR[8] * f[8]); + inputSampleR += (bR[9] * f[9]); //intense averaging on deeper cutoffs + + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + //without this, you can get a NaN condition where it spits out DC offset at full blast! + inputSampleL = asin(inputSampleL); + inputSampleR = asin(inputSampleR); + //amplitude aspect + if (inputSampleL > 1.0) inputSampleL = 1.0; + if (inputSampleL < -1.0) inputSampleL = -1.0; + if (inputSampleR > 1.0) inputSampleR = 1.0; + if (inputSampleR < -1.0) inputSampleR = -1.0; + //and then Console5 will spit out overs if you let it + + if (outputchase < 1.0) { + inputSampleL *= outputchase; + inputSampleR *= outputchase; + } + + if (wetchase < 1.0) { + inputSampleL = (inputSampleL*wetchase) + (drySampleL*(1.0-fabs(wetchase))); + inputSampleR = (inputSampleR*wetchase) + (drySampleR*(1.0-fabs(wetchase))); + //inv/dry/wet lets us turn LP into HP and band into notch + } + + //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++; + } +} |