fili.min.js

/**
 * @name    fili
 * @version 2.0.3 | December 13th 2018
 * @author  Florian Markert
 * @license MIT
 */
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t=r.Fs,e=r.Fc,n=r.order,a=2*Math.PI*e/t,u=0,o=0,i=[];for(u=0;u<=n;u++)u-n/2==0?i[u]=a:(i[u]=Math.sin(a*(u-n/2))/(u-n/2),i[u]*=.54-.46*Math.cos(2*Math.PI*u/n)),o+=i[u];for(u=0;u<=n;u++)i[u]/=o;return i},e=function(r){var t;for(t=0;t<r.length;t++)r[t]=-r[t];return r[(r.length-1)/2]++,r},n=function(r){for(var n=t({order:r.order,Fs:r.Fs,Fc:r.F2}),a=e(t({order:r.order,Fs:r.Fs,Fc:r.F1})),u=[],o=0;o<n.length;o++)u.push(n[o]+a[o]);return u};return{lowpass:function(r){return t(r)},highpass:function(r){return e(t(r))},bandstop:function(r){return n(r)},bandpass:function(r){return e(n(r))},kbFilter:function(t){return r(t)},available:function(){return["lowpass","highpass","bandstop","bandpass","kbFilter"]}}};t.exports=n},{}],5:[function(r,t,e){"use strict";var n=r("./utils"),a=n.runMultiFilter,u=n.runMultiFilterReverse,o=n.complex,i=n.evaluatePhase,s=function(r){var t=r,e=[],n=0;for(n=0;n<t.length;n++)e[n]={re:t[n],im:0};var s=function(r){var t,e=[];for(t=0;t<r;t++)e.push(0);return{buf:e,pointer:0}},c=s(t.length-1),f=function(r,e){e.buf[e.pointer]=r;var a=0;for(n=0;n<e.buf.length;n++)a+=t[n]*e.buf[(e.pointer+n)%e.buf.length];return e.pointer=(e.pointer+1)%e.buf.length,a},l=function(r){var e=s(t.length-1);return a(r,e,f)},h=function(r){for(var n=r.Fs,a=r.Fr,u=-Math.PI*(a/n)*2,i={re:0,im:0},s=0;s<t.length-1;s++)i=o.add(i,o.mul(e[s],{re:Math.cos(u*s),im:Math.sin(u*s)}));var c=o.magnitude(i);return{magnitude:c,phase:o.phase(i),dBmagnitude:20*Math.log(c)*Math.LOG10E}};return{responsePoint:function(r){return h(r)},response:function(r){r=r||100;var t=[],e=0,n=2*r;for(e=0;e<r;e++)t[e]=h({Fs:n,Fr:e});return i(t),t},simulate:function(r){return l(r)},singleStep:function(r){return f(r,c)},multiStep:function(r,t){return a(r,c,f,t)},filtfilt:function(r,t){return u(a(r,c,f,t),c,f,!0)},reinit:function(){c=s(t.length-1)}}};t.exports=s},{"./utils":9}],6:[function(r,t,e){"use strict";var n=function(){var r=function(r,t){var e=r.Q,n=r.Fc,a=r.Fs,u={},o=2*Math.PI*n/a;return r.BW?u.alpha=Math.sin(o)*Math.sinh(Math.log(2)/2*r.BW*o/Math.sin(o)):u.alpha=Math.sin(o)/(2*e),u.cw=Math.cos(o),u.a0=1+u.alpha,t.a0=u.a0,t.a.push(-2*u.cw/u.a0),t.k=1,t.a.push((1-u.alpha)/u.a0),u},t=function(r){var t=r.Q,e=r.Fc,n=r.Fs,a={},u=2*Math.PI*e/n;return a.alpha=Math.sin(u)/(2*t),a.cw=Math.cos(u),a.A=Math.pow(10,r.gain/40),a},e=function(){var r={};return r.z=[0,0],r.a=[],r.b=[],r};return{fromPZ:function(r){var t=e();return t.a0=1,t.b.push(1),t.b.push(-r.z0.re-r.z1.re),t.b.push(r.z0.re*r.z1.re-r.z0.im*r.z1.im),t.a.push(-r.p0.re-r.p1.re),t.a.push(r.p0.re*r.p1.re-r.p0.im*r.p1.im),"lowpass"===r.type?t.k=(1+t.a[0]+t.a[1])/(1+t.b[1]+t.b[2]):t.k=(1-t.a[0]+t.a[1])/(1-t.b[1]+t.b[2]),t},lowpassMZ:function(r){var t=e();t.a0=1;var n=r.as,a=r.bs,u=2*Math.PI*r.Fc/r.Fs,o=-n/(2*a);return t.a.push(2*-Math.pow(Math.E,o*u)*Math.cos(-u*Math.sqrt(Math.abs(Math.pow(n,2)/(4*Math.pow(a,2))-1/a)))),t.a.push(Math.pow(Math.E,2*o*u)),r.preGain?(t.b.push(1),t.k=t.a0+t.a[0]+t.a[1]):(t.b.push(t.a0+t.a[0]+t.a[1]),t.k=1),t.b.push(0),t.b.push(0),t},lowpassBT:function(r){var t=e();return r.Q=1,t.wp=Math.tan(2*Math.PI*r.Fc/(2*r.Fs)),t.wp2=t.wp*t.wp,r.BW&&delete r.BW,t.k=1,t.a0=3*t.wp+3*t.wp2+1,t.b.push(3*t.wp2*r.Q/t.a0),t.b.push(2*t.b[0]),t.b.push(t.b[0]),t.a.push((6*t.wp2-2)/t.a0),t.a.push((3*t.wp2-3*t.wp+1)/t.a0),t},highpassBT:function(r){var t=e();return r.Q=1,t.wp=Math.tan(2*Math.PI*r.Fc/(2*r.Fs)),t.wp2=t.wp*t.wp,r.BW&&delete r.BW,t.k=1,t.a0=t.wp+t.wp2+3,t.b.push(3*r.Q/t.a0),t.b.push(2*t.b[0]),t.b.push(t.b[0]),t.a.push((2*t.wp2-6)/t.a0),t.a.push((t.wp2-t.wp+3)/t.a0),t},lowpass:function(t){var n=e();t.BW&&delete t.BW;var a=r(t,n);return t.preGain?(n.k=.5*(1-a.cw),n.b.push(1/a.a0)):(n.k=1,n.b.push((1-a.cw)/(2*a.a0))),n.b.push(2*n.b[0]),n.b.push(n.b[0]),n},highpass:function(t){var n=e();t.BW&&delete t.BW;var a=r(t,n);return t.preGain?(n.k=.5*(1+a.cw),n.b.push(1/a.a0)):(n.k=1,n.b.push((1+a.cw)/(2*a.a0))),n.b.push(-2*n.b[0]),n.b.push(n.b[0]),n},allpass:function(t){var n=e();t.BW&&delete t.BW;var a=r(t,n);return n.k=1,n.b.push((1-a.alpha)/a.a0),n.b.push(-2*a.cw/a.a0),n.b.push((1+a.alpha)/a.a0),n},bandpassQ:function(t){var n=e(),a=r(t,n);return n.k=1,n.b.push(a.alpha*t.Q/a.a0),n.b.push(0),n.b.push(-n.b[0]),n},bandpass:function(t){var n=e(),a=r(t,n);return n.k=1,n.b.push(a.alpha/a.a0),n.b.push(0),n.b.push(-n.b[0]),n},bandstop:function(t){var n=e(),a=r(t,n);return n.k=1,n.b.push(1/a.a0),n.b.push(-2*a.cw/a.a0),n.b.push(n.b[0]),n},peak:function(r){var n=e(),a=t(r);return n.k=1,n.a0=1+a.alpha/a.A,n.a.push(-2*a.cw/n.a0),n.a.push((1-a.alpha/a.A)/n.a0),n.b.push((1+a.alpha*a.A)/n.a0),n.b.push(-2*a.cw/n.a0),n.b.push((1-a.alpha*a.A)/n.a0),n},lowshelf:function(r){var n=e();r.BW&&delete r.BW;var a=t(r);n.k=1;var u=2*Math.sqrt(a.A)*a.alpha;return n.a0=a.A+1+(a.A-1)*a.cw+u,n.a.push(-2*(a.A-1+(a.A+1)*a.cw)/n.a0),n.a.push((a.A+1+(a.A-1)*a.cw-u)/n.a0),n.b.push(a.A*(a.A+1-(a.A-1)*a.cw+u)/n.a0),n.b.push(2*a.A*(a.A-1-(a.A+1)*a.cw)/n.a0),n.b.push(a.A*(a.A+1-(a.A-1)*a.cw-u)/n.a0),n},highshelf:function(r){var n=e();r.BW&&delete r.BW;var a=t(r);n.k=1;var u=2*Math.sqrt(a.A)*a.alpha;return n.a0=a.A+1-(a.A-1)*a.cw+u,n.a.push(2*(a.A-1-(a.A+1)*a.cw)/n.a0),n.a.push((a.A+1-(a.A-1)*a.cw-u)/n.a0),n.b.push(a.A*(a.A+1+(a.A-1)*a.cw+u)/n.a0),n.b.push(-2*a.A*(a.A-1+(a.A+1)*a.cw)/n.a0),n.b.push(a.A*(a.A+1+(a.A-1)*a.cw-u)/n.a0),n},aweighting:function(r){var t=e();t.k=1;var n=2*Math.PI*r.Fc/r.Fs,a=2*Math.tan(n/2),u=r.Q,o=Math.pow(a,2);return t.a0=4*u+o*u+2*a,t.a.push(2*o*u-8*u),t.a.push(4*u+o*u-2*a),t.b.push(o*u),t.b.push(2*o*u),t.b.push(o*u),t}}};t.exports=n},{}],7:[function(r,t,e){"use strict";var n=r("./utils"),a=n.complex,u=n.runMultiFilter,o=n.runMultiFilterReverse,i=n.evaluatePhase,s=function(r){for(var t=r,e={re:1,im:0},n=[],s=[],c=0;c<t.length;c++){n[c]={};var f=t[c];n[c].b0={re:f.b[0],im:0},n[c].b1={re:f.b[1],im:0},n[c].b2={re:f.b[2],im:0},n[c].a1={re:f.a[0],im:0},n[c].a2={re:f.a[1],im:0},n[c].k={re:f.k,im:0},n[c].z=[0,0],s[c]={},s[c].b1=f.b[1]/f.b[0],s[c].b2=f.b[2]/f.b[0],s[c].a1=f.a[0],s[c].a2=f.a[1]}var l=function(r,t){var e=t*r.k.re-r.a1.re*r.z[0]-r.a2.re*r.z[1],n=r.b0.re*e+r.b1.re*r.z[0]+r.b2.re*r.z[1];return r.z[1]=r.z[0],r.z[0]=e,n},h=function(r,t){var e=r,n=0;for(n=0;n<t.length;n++)e=l(t[n],e);return e},p=function(r,t){var n=r.Fs,u=r.Fr,o=-Math.PI*(u/n)*2,i={re:Math.cos(o),im:Math.sin(o)},s=a.mul(t.k,a.add(t.b0,a.mul(i,a.add(t.b1,a.mul(t.b2,i))))),c=a.add(e,a.mul(i,a.add(t.a1,a.mul(t.a2,i)))),f=a.div(s,c);return{magnitude:a.magnitude(f),phase:a.phase(f)}},v=function(r){var t=0,e={magnitude:1,phase:0};for(t=0;t<n.length;t++){var a=p(r,n[t]);e.magnitude*=a.magnitude,e.phase+=a.phase}return e.dBmagnitude=20*Math.log(e.magnitude)*Math.LOG10E,e},b=function(){for(var r=[],e=0;e<t.length;e++)r[e]={b0:{re:f.b[0],im:0},b1:{re:f.b[1],im:0},b2:{re:f.b[2],im:0},a1:{re:f.a[0],im:0},a2:{re:f.a[1],im:0},k:{re:f.k,im:0},z:[0,0]};return r},m=function(r){var t=b();return u(r,t,h)},d=function(r,t){var e={},n=[],a=0;for(a=0;a<t;a++)n.push(r(a));e.out=m(n);var u=!1,o=!1;for(a=0;a<t-1;a++)if(e.out[a]>e.out[a+1]&&!u&&(u=!0,e.max={sample:a,value:e.out[a]}),u&&!o&&e.out[a]<e.out[a+1]){o=!0,e.min={sample:a,value:e.out[a]};break}return e},M=function(r,t){var e=Math.pow(r/2,2)-t;return e<0?[{re:-r/2,im:Math.sqrt(Math.abs(e))},{re:-r/2,im:-Math.sqrt(Math.abs(e))}]:[{re:-r/2+Math.sqrt(e),im:0},{re:-r/2-Math.sqrt(e),im:0}]},g=function(){for(var r=[],t=0;t<s.length;t++)r[t]={},r[t].z=M(s[t].b1,s[t].b2),r[t].p=M(s[t].a1,s[t].a2);return r};return{singleStep:function(r){return h(r,n)},multiStep:function(r,t){return u(r,n,h,t)},filtfilt:function(r,t){return o(u(r,n,h,t),n,h,!0)},simulate:function(r){return m(r)},stepResponse:function(r){return d(function(){return 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a=r.offset+r.pp,u=r.offset-r.pp,o=u,i=(a-u)/100;for(t=0;t<r.steps;t++)t%200<100?o+=i:o-=i,n.push(e.singleStep(o))};return{randomStability:function(r){for(e.reinit(),n.length=0,a(r),t=r.setup;t<n.length;t++)if(n[t]>r.maxStable||n[t]<r.minStable)return n[t];return!0},directedRandomStability:function(r){e.reinit(),n.length=0;var s;for(s=0;s<r.tests;s++){var c=Math.random();c<.25?a(r):c<.5?u(r):c<.75?o(r):i(r)}for(a(r),t=r.setup;t<n.length;t++)if(n[t]>r.maxStable||n[t]<r.minStable)return n[t];return!0},evaluateBehavior:function(){}}};t.exports=n},{}],9:[function(r,t,e){"use strict";e.evaluatePhase=function(r){var t=0,e=0,n=Math.PI,a=2*n,u=[];for(e=0;e<r.length;e++)u.push(r[e].phase);for(r[0].unwrappedPhase=r[0].phase,r[0].groupDelay=0,e=1;e<u.length;e++){var o=u[e]-u[e-1];if(o>n)for(t=e;t<u.length;t++)u[t]-=a;else if(o<-n)for(t=e;t<u.length;t++)u[t]+=a;u[e]<0?r[e].unwrappedPhase=-u[e]:r[e].unwrappedPhase=u[e],r[e].phaseDelay=r[e].unwrappedPhase/(e/r.length),r[e].groupDelay=(r[e].unwrappedPhase-r[e-1].unwrappedPhase)/(n/r.length),r[e].groupDelay<0&&(r[e].groupDelay=-r[e].groupDelay)}0!==r[0].magnitude?(r[0].phaseDelay=r[1].phaseDelay,r[0].groupDelay=r[1].groupDelay):(r[0].phaseDelay=r[2].phaseDelay,r[0].groupDelay=r[2].groupDelay,r[1].phaseDelay=r[2].phaseDelay,r[1].groupDelay=r[2].groupDelay)},e.runMultiFilter=function(r,t,e,n){var a=[];n&&(a=r);var u;for(u=0;u<r.length;u++)a[u]=e(r[u],t);return a},e.runMultiFilterReverse=function(r,t,e,n){var a=[];n&&(a=r);var u;for(u=r.length-1;u>=0;u--)a[u]=e(r[u],t);return a};var n=function(r,t){for(var e=!0;e;){var n=r,a=t;if(e=!1,a||(a=1),n!==Math.floor(n)||a!==Math.floor(a))return 1;if(0===n||1===n)return a;r=n-1,t=a*n,e=!0}};e.besselFactors=function(r){for(var t=[],e=0;e<r+1;e++){var a=n(2*r-e),u=Math.pow(2,r-e)*n(e)*n(r-e);t.unshift(Math.floor(a/u))}return t};var a=function(r,t){for(var e=0,n=0;n<t;n++){var a=1/Math.pow(2,n+1);r>a&&(r-=a,e+=a)}return e},u=function(r,t){return r&Math.pow(2,t)},o=function(r,t,e){var n=Math.abs(r),o=r-n;return{number:u(n,t).toString(),fraction:a(o,e).toString(),numberBits:t,fractionBits:e}};e.fixedPoint={convert:function(r,t,e){return o(r,t,e)},add:function(r,t){},sub:function(r,t){},mul:function(r,t){},div:function(r,t){}},e.complex={div:function(r,t){var e=r.re,n=r.im,a=t.re,u=t.im,o=a*a+u*u;return{re:(e*a+n*u)/o,im:(n*a-e*u)/o}},mul:function(r,t){var e=r.re,n=r.im,a=t.re,u=t.im;return{re:e*a-n*u,im:(e+n)*(a+u)-e*a-n*u}},add:function(r,t){return{re:r.re+t.re,im:r.im+t.im}},sub:function(r,t){return{re:r.re-t.re,im:r.im-t.im}},phase:function(r){return Math.atan2(r.im,r.re)},magnitude:function(r){return Math.sqrt(r.re*r.re+r.im*r.im)}}},{}]},{},[1])(1)});