(function(){OnlineTuner=function(){this.VERSION="1.0";this.installArray();this.installFloat32Array()};OnlineTuner.prototype={$:function(a){return document.getElementById(a)},virtual:function(){throw"call pure virtual function";},installFloat32Array:function(){Float32Array.prototype.max=function(){return Math.max.apply(null,this)};Float32Array.prototype.indexof=function(a){return Array.prototype.indexOf.call(this,a)};Float32Array.prototype.slice=function(a,b){return Array.prototype.slice.call(this,a,b)};Float32Array.prototype.select=function(f){for(var i=0;i<this.length;i++){this[i]=f(this[i])}}},installArray:function(){Array.prototype.map=function(f){var a=new Array(this.length);for(var i in this){a[i]=f(this[i])};return a};Array.prototype.where=function(f){var a=new Array();for(var i in this){if(f(this[i])){a[i]=this[i]}};return a}},getUserMediaFunction:function(){return navigator.getUserMedia||navigator.webkitGetUserMedia||navigator.mozGetUserMedia||navigator.msGetUserMedia},isHtml5Compatible:function(){return!!this.getUserMediaFunction()},getUserMedia:function(a,b,c){return this.getUserMediaFunction().call(navigator,a,b,c)},createAudioContext:function(){var a=window.AudioContext||window.webkitAudioContext;return new a()}}})();this.OnlineTuner=new OnlineTuner();(function(){var g=["A","A#","B","C","C#","D","D#","E","F","F#","G","G#"];var h=function(a){var b=new Float32Array(a);for(var i=0;i<b.length;i++){b[i]=0.42-0.5*Math.cos(2*Math.PI*i/(b.length-1))+0.08*Math.cos(4*Math.PI*i/(b.length-1))}return b};var j=function(a){var b=new Float32Array(a);for(var i=0;i<b.length;i++){b[i]=0.54-0.46*Math.cos(2*Math.PI*i/b.length)}return b};var k=function(a){return 12*Math.log(a/440.0)/Math.LN2};var l=function(a){return((a-2)/Math.abs(a-2))*Math.floor(Math.abs(a-2)/12)+4};var m=function(a){var b=Math.round(a)%g.length;if(b<0)return g[12+b];else return g[b]};var n=function(c,d,e){this.highFrequency=e||350.0;this.precision=d||(4*16384);this.controllers=c;this.audioContext=OnlineTuner.createAudioContext();this.inputStream=new Float32Array(this.precision);this.fft=new OnlineTuner.FFT(this.precision,this.audioContext.sampleRate);this.scriptNode=this.audioContext.createScriptProcessor(Math.min(this.precision,16384),1,1);var f=this;this.scriptNode.onaudioprocess=function(a){var b=a.inputBuffer.getChannelData(0);f.update(b)};this.scriptNode.connect(this.audioContext.destination);this.input=null;this.window=h(this.precision)};n.prototype={install:function(b,c){if(!OnlineTuner.isHtml5Compatible()){c("Not html5 browser compliant");return}var d=this;OnlineTuner.getUserMedia({audio:true},function(a){d.input=d.audioContext.createMediaStreamSource(a);d.input.connect(d.scriptNode);b()},function(e){c(e)})},update:function(a){this.inputStream.set(this.inputStream.subarray(this.precision));this.inputStream.set(a,this.inputStream.length-a.length);for(var i=0;i<a.length;i++){this.inputStream[i]*=this.window[i]}this.fft.forward(this.inputStream);for(var i=0;i<this.fft.spectrum.length;i++){this.fft.spectrum[i]*=this.microResponse(i)}for(var i=0;i<this.controllers.length;i++){this.controllers[i].notify(this.getInfo())}},getError:function(){return this.audioContext.sampleRate/this.precision},getData:function(){return this.fft.spectrum},getStepError:function(a){return k(a+this.getError())-k(a)},getInfo:function(){var a=this.getData().subarray(0,this.highFrequency/this.getError());var b=(a.indexof(a.max())*this.getError());if(b==0)b=440.0;var c=k(b);return{frequency:b,step:c,error:this.getError(b),stepError:this.getStepError(b),note:m(c),octave:l(c)}},microResponse:function(i){if(i*this.getError()<this.microphoneResponseFrequency){return-1*0.06*this.getError()*i+13}else{return 1.0}}};OnlineTuner.Analyser=n})();(function(){var f=[-5,-10,-14,-19,-24,-29];var g=["E","B","G","D","A","E"];var h=function(a){var b=f.map(function(e){return Math.abs(e-a.step)});var c=b.indexOf(Math.min.apply(null,b));var d=f[c]-a.step;if(Math.abs(d)-a.stepError<0){d=0}return{string:c+1,note:g[c],delta:d}};var i=function(){};i.prototype={notify:OnlineTuner.virtual};var j=function(a){i.call(this);this.widget=a};j.prototype={notify:function(a){var b=h(a);this.widget.show(-(b.delta)/5.0,b.note,"string "+b.string,a.note+""+a.octave+"("+Math.round(a.frequency)+"Hz)")}};OnlineTuner.Controller={GuitareTuner:j}})();(function(){function FourierTransform(b,c){this.bufferSize=b;this.sampleRate=c;this.bandwidth=2/b*c/2;this.spectrum=new Float32Array(b/2);this.real=new Float32Array(b);this.imag=new Float32Array(b);this.peakBand=0;this.peak=0;this.getBandFrequency=function(a){return this.bandwidth*a+this.bandwidth/2};this.calculateSpectrum=function(){var a=this.spectrum,real=this.real,imag=this.imag,bSi=2/this.bufferSize,sqrt=Math.sqrt,rval,ival,mag;for(var i=0,N=b/2;i<N;i++){rval=real[i];ival=imag[i];mag=bSi*sqrt(rval*rval+ival*ival);if(mag>this.peak){this.peakBand=i;this.peak=mag}a[i]=mag}}}function FFT(a,b){FourierTransform.call(this,a,b);this.reverseTable=new Uint32Array(a);var c=1;var d=a>>1;var i;while(c<a){for(i=0;i<c;i++){this.reverseTable[i+c]=this.reverseTable[i]+d}c=c<<1;d=d>>1}this.sinTable=new Float32Array(a);this.cosTable=new Float32Array(a);for(i=0;i<a;i++){this.sinTable[i]=Math.sin(-Math.PI/i);this.cosTable[i]=Math.cos(-Math.PI/i)}}FFT.prototype={forward:function(a){var b=this.bufferSize,cosTable=this.cosTable,sinTable=this.sinTable,reverseTable=this.reverseTable,real=this.real,imag=this.imag,spectrum=this.spectrum;var k=Math.floor(Math.log(b)/Math.LN2);if(Math.pow(2,k)!==b){throw"Invalid buffer size, must be a power of 2.";}if(b!==a.length){throw"Supplied buffer is not the same size as defined FFT. FFT Size: "+b+" Buffer Size: "+a.length;}var c=1,phaseShiftStepReal,phaseShiftStepImag,currentPhaseShiftReal,currentPhaseShiftImag,off,tr,ti,tmpReal,i;for(i=0;i<b;i++){real[i]=a[reverseTable[i]];imag[i]=0}while(c<b){phaseShiftStepReal=cosTable[c];phaseShiftStepImag=sinTable[c];currentPhaseShiftReal=1;currentPhaseShiftImag=0;for(var d=0;d<c;d++){i=d;while(i<b){off=i+c;tr=(currentPhaseShiftReal*real[off])-(currentPhaseShiftImag*imag[off]);ti=(currentPhaseShiftReal*imag[off])+(currentPhaseShiftImag*real[off]);real[off]=real[i]-tr;imag[off]=imag[i]-ti;real[i]+=tr;imag[i]+=ti;i+=c<<1}tmpReal=currentPhaseShiftReal;currentPhaseShiftReal=(tmpReal*phaseShiftStepReal)-(currentPhaseShiftImag*phaseShiftStepImag);currentPhaseShiftImag=(tmpReal*phaseShiftStepImag)+(currentPhaseShiftImag*phaseShiftStepReal)}c=c<<1}return this.calculateSpectrum()},inverse:function(a,b){var c=this.bufferSize,cosTable=this.cosTable,sinTable=this.sinTable,reverseTable=this.reverseTable,spectrum=this.spectrum;a=a||this.real;b=b||this.imag;var d=1,phaseShiftStepReal,phaseShiftStepImag,currentPhaseShiftReal,currentPhaseShiftImag,off,tr,ti,tmpReal,i;for(i=0;i<c;i++){b[i]*=-1}var e=new Float32Array(c);var f=new Float32Array(c);for(i=0;i<a.length;i++){e[i]=a[reverseTable[i]];f[i]=b[reverseTable[i]]}a=e;b=f;while(d<c){phaseShiftStepReal=cosTable[d];phaseShiftStepImag=sinTable[d];currentPhaseShiftReal=1;currentPhaseShiftImag=0;for(var g=0;g<d;g++){i=g;while(i<c){off=i+d;tr=(currentPhaseShiftReal*a[off])-(currentPhaseShiftImag*b[off]);ti=(currentPhaseShiftReal*b[off])+(currentPhaseShiftImag*a[off]);a[off]=a[i]-tr;b[off]=b[i]-ti;a[i]+=tr;b[i]+=ti;i+=d<<1}tmpReal=currentPhaseShiftReal;currentPhaseShiftReal=(tmpReal*phaseShiftStepReal)-(currentPhaseShiftImag*phaseShiftStepImag);currentPhaseShiftImag=(tmpReal*phaseShiftStepImag)+(currentPhaseShiftImag*phaseShiftStepReal)}d=d<<1}var h=new Float32Array(c);for(i=0;i<c;i++){h[i]=a[i]/c}return h}};OnlineTuner.FFT=FFT})();(function(){var f=function(a,b,c,d,e){this.canvas=a;this.bgColor=b;this.deltaColor=c;this.okColor=d;this.fontColor=e;this.ctx=this.canvas.getContext("2d")};f.prototype={show:function(a,b,c,d){this.ctx.fillStyle=this.bgColor;this.ctx.fillRect(0,0,this.canvas.width,this.canvas.height);this.ctx.beginPath();this.ctx.moveTo(this.canvas.width/2,this.canvas.height/2);this.ctx.arc(this.canvas.width/2,this.canvas.height/2,this.canvas.width/2,-Math.PI/2.0,-Math.PI/2.0+a*Math.PI,a<=0);this.ctx.lineTo(this.canvas.width/2,this.canvas.height/2);this.ctx.fillStyle=this.deltaColor;this.ctx.fill();this.ctx.closePath();this.ctx.beginPath();this.ctx.arc(this.canvas.width/2,this.canvas.height/2,(4*this.canvas.width)/10,0,2*Math.PI);this.ctx.fillStyle=a==0?this.okColor:this.bgColor;this.ctx.fill();this.ctx.closePath();this.ctx.font='70pt Arial';this.ctx.textAlign='center';this.ctx.fillStyle=this.fontColor;this.ctx.fillText(b,this.canvas.width/2,this.canvas.height/2+15);this.ctx.font='20pt Arial';this.ctx.textAlign='center';this.ctx.fillStyle=this.fontColor;this.ctx.fillText(c,this.canvas.width/2,this.canvas.height/2+55);this.ctx.font='15pt Arial';this.ctx.textAlign='center';this.ctx.fillStyle=this.fontColor;this.ctx.fillText(d,this.canvas.width/2,this.canvas.height/2+85)}};OnlineTuner.Widget={CircleWidget:f}})();