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-rwxr-xr-xplugins/WinVST/Biquad2/Biquad2Proc.cpp432
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
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--- /dev/null
+++ b/plugins/WinVST/Biquad2/Biquad2Proc.cpp
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+/* ========================================
+ * 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++;
+ }
+}
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