ami-cjs.js/build/ami.min.js

<p align="center"> <img src="https://cloud.githubusercontent.com/assets/214063/23213764/78ade038-f90c-11e6-8208-4fcade5f3832.png" width="60%"> </p>

(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.AMI=f()}})(function(){var define,module,exports;return function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s}({1:[function(require,module,exports){var ColorSpace={Unkown:0,Grayscale:1,AdobeRGB:2,RGB:3,CYMK:4};var JpegImage=function jpegImage(){"use strict";var dctZigZag=new Int32Array([0,1,8,16,9,2,3,10,17,24,32,25,18,11,4,5,12,19,26,33,40,48,41,34,27,20,13,6,7,14,21,28,35,42,49,56,57,50,43,36,29,22,15,23,30,37,44,51,58,59,52,45,38,31,39,46,53,60,61,54,47,55,62,63]);var dctCos1=4017;var dctSin1=799;var dctCos3=3406;var dctSin3=2276;var dctCos6=1567;var dctSin6=3784;var dctSqrt2=5793;var dctSqrt1d2=2896;function constructor(){}function buildHuffmanTable(codeLengths,values){var k=0,code=[],i,j,length=16;while(length>0&&!codeLengths[length-1])length--;code.push({children:[],index:0});var p=code[0],q;for(i=0;i<length;i++){for(j=0;j<codeLengths[i];j++){p=code.pop();p.children[p.index]=values[k];while(p.index>0){p=code.pop()}p.index++;code.push(p);while(code.length<=i){code.push(q={children:[],index:0});p.children[p.index]=q.children;p=q}k++}if(i+1<length){code.push(q={children:[],index:0});p.children[p.index]=q.children;p=q}}return code[0].children}function getBlockBufferOffset(component,row,col){return 64*((component.blocksPerLine+1)*row+col)}function decodeScan(data,offset,frame,components,resetInterval,spectralStart,spectralEnd,successivePrev,successive){var precision=frame.precision;var samplesPerLine=frame.samplesPerLine;var scanLines=frame.scanLines;var mcusPerLine=frame.mcusPerLine;var progressive=frame.progressive;var maxH=frame.maxH,maxV=frame.maxV;var startOffset=offset,bitsData=0,bitsCount=0;function readBit(){if(bitsCount>0){bitsCount--;return bitsData>>bitsCount&1}bitsData=data[offset++];if(bitsData==255){var nextByte=data[offset++];if(nextByte){throw"unexpected marker: "+(bitsData<<8|nextByte).toString(16)}}bitsCount=7;return bitsData>>>7}function decodeHuffman(tree){var node=tree;var bit;while((bit=readBit())!==null){node=node[bit];if(typeof node==="number")return node;if(typeof node!=="object")throw"invalid huffman sequence"}return null}function receive(length){var n=0;while(length>0){var bit=readBit();if(bit===null)return;n=n<<1|bit;length--}return n}function receiveAndExtend(length){var n=receive(length);if(n>=1<<length-1)return n;return n+(-1<<length)+1}function decodeBaseline(component,offset){var t=decodeHuffman(component.huffmanTableDC);var diff=t===0?0:receiveAndExtend(t);component.blockData[offset]=component.pred+=diff;var k=1;while(k<64){var rs=decodeHuffman(component.huffmanTableAC);var s=rs&15,r=rs>>4;if(s===0){if(r<15)break;k+=16;continue}k+=r;var z=dctZigZag[k];component.blockData[offset+z]=receiveAndExtend(s);k++}}function decodeDCFirst(component,offset){var t=decodeHuffman(component.huffmanTableDC);var diff=t===0?0:receiveAndExtend(t)<<successive;component.blockData[offset]=component.pred+=diff}function decodeDCSuccessive(component,offset){component.blockData[offset]|=readBit()<<successive}var eobrun=0;function decodeACFirst(component,offset){if(eobrun>0){eobrun--;return}var k=spectralStart,e=spectralEnd;while(k<=e){var rs=decodeHuffman(component.huffmanTableAC);var s=rs&15,r=rs>>4;if(s===0){if(r<15){eobrun=receive(r)+(1<<r)-1;break}k+=16;continue}k+=r;var z=dctZigZag[k];component.blockData[offset+z]=receiveAndExtend(s)*(1<<successive);k++}}var successiveACState=0,successiveACNextValue;function decodeACSuccessive(component,offset){var k=spectralStart,e=spectralEnd,r=0;while(k<=e){var z=dctZigZag[k];switch(successiveACState){case 0:var rs=decodeHuffman(component.huffmanTableAC);var s=rs&15;r=rs>>4;if(s===0){if(r<15){eobrun=receive(r)+(1<<r);successiveACState=4}else{r=16;successiveACState=1}}else{if(s!==1)throw"invalid ACn encoding";successiveACNextValue=receiveAndExtend(s);successiveACState=r?2:3}continue;case 1:case 2:if(component.blockData[offset+z]){component.blockData[offset+z]+=readBit()<<successive}else{r--;if(r===0)successiveACState=successiveACState==2?3:0}break;case 3:if(component.blockData[offset+z]){component.blockData[offset+z]+=readBit()<<successive}else{component.blockData[offset+z]=successiveACNextValue<<successive;successiveACState=0}break;case 4:if(component.blockData[offset+z]){component.blockData[offset+z]+=readBit()<<successive}break}k++}if(successiveACState===4){eobrun--;if(eobrun===0)successiveACState=0}}function decodeMcu(component,decode,mcu,row,col){var mcuRow=mcu/mcusPerLine|0;var mcuCol=mcu%mcusPerLine;var blockRow=mcuRow*component.v+row;var blockCol=mcuCol*component.h+col;var offset=getBlockBufferOffset(component,blockRow,blockCol);decode(component,offset)}function decodeBlock(component,decode,mcu){var blockRow=mcu/component.blocksPerLine|0;var blockCol=mcu%component.blocksPerLine;var offset=getBlockBufferOffset(component,blockRow,blockCol);decode(component,offset)}var componentsLength=components.length;var component,i,j,k,n;var decodeFn;if(progressive){if(spectralStart===0)decodeFn=successivePrev===0?decodeDCFirst:decodeDCSuccessive;else decodeFn=successivePrev===0?decodeACFirst:decodeACSuccessive}else{decodeFn=decodeBaseline}var mcu=0,marker;var mcuExpected;if(componentsLength==1){mcuExpected=components[0].blocksPerLine*components[0].blocksPerColumn}else{mcuExpected=mcusPerLine*frame.mcusPerColumn}if(!resetInterval){resetInterval=mcuExpected}var h,v;while(mcu<mcuExpected){for(i=0;i<componentsLength;i++){components[i].pred=0}eobrun=0;if(componentsLength==1){component=components[0];for(n=0;n<resetInterval;n++){decodeBlock(component,decodeFn,mcu);mcu++}}else{for(n=0;n<resetInterval;n++){for(i=0;i<componentsLength;i++){component=components[i];h=component.h;v=component.v;for(j=0;j<v;j++){for(k=0;k<h;k++){decodeMcu(component,decodeFn,mcu,j,k)}}}mcu++}}bitsCount=0;marker=data[offset]<<8|data[offset+1];if(marker<=65280){throw"marker was not found"}if(marker>=65488&&marker<=65495){offset+=2}else{break}}return offset-startOffset}function quantizeAndInverse(component,blockBufferOffset,p){var qt=component.quantizationTable;var v0,v1,v2,v3,v4,v5,v6,v7,t;var i;for(i=0;i<64;i++){p[i]=component.blockData[blockBufferOffset+i]*qt[i]}for(i=0;i<8;++i){var row=8*i;if(p[1+row]===0&&p[2+row]===0&&p[3+row]===0&&p[4+row]===0&&p[5+row]===0&&p[6+row]===0&&p[7+row]===0){t=dctSqrt2*p[0+row]+512>>10;p[0+row]=t;p[1+row]=t;p[2+row]=t;p[3+row]=t;p[4+row]=t;p[5+row]=t;p[6+row]=t;p[7+row]=t;continue}v0=dctSqrt2*p[0+row]+128>>8;v1=dctSqrt2*p[4+row]+128>>8;v2=p[2+row];v3=p[6+row];v4=dctSqrt1d2*(p[1+row]-p[7+row])+128>>8;v7=dctSqrt1d2*(p[1+row]+p[7+row])+128>>8;v5=p[3+row]<<4;v6=p[5+row]<<4;t=v0-v1+1>>1;v0=v0+v1+1>>1;v1=t;t=v2*dctSin6+v3*dctCos6+128>>8;v2=v2*dctCos6-v3*dctSin6+128>>8;v3=t;t=v4-v6+1>>1;v4=v4+v6+1>>1;v6=t;t=v7+v5+1>>1;v5=v7-v5+1>>1;v7=t;t=v0-v3+1>>1;v0=v0+v3+1>>1;v3=t;t=v1-v2+1>>1;v1=v1+v2+1>>1;v2=t;t=v4*dctSin3+v7*dctCos3+2048>>12;v4=v4*dctCos3-v7*dctSin3+2048>>12;v7=t;t=v5*dctSin1+v6*dctCos1+2048>>12;v5=v5*dctCos1-v6*dctSin1+2048>>12;v6=t;p[0+row]=v0+v7;p[7+row]=v0-v7;p[1+row]=v1+v6;p[6+row]=v1-v6;p[2+row]=v2+v5;p[5+row]=v2-v5;p[3+row]=v3+v4;p[4+row]=v3-v4}for(i=0;i<8;++i){var col=i;if(p[1*8+col]===0&&p[2*8+col]===0&&p[3*8+col]===0&&p[4*8+col]===0&&p[5*8+col]===0&&p[6*8+col]===0&&p[7*8+col]===0){t=dctSqrt2*p[i+0]+8192>>14;p[0*8+col]=t;p[1*8+col]=t;p[2*8+col]=t;p[3*8+col]=t;p[4*8+col]=t;p[5*8+col]=t;p[6*8+col]=t;p[7*8+col]=t;continue}v0=dctSqrt2*p[0*8+col]+2048>>12;v1=dctSqrt2*p[4*8+col]+2048>>12;v2=p[2*8+col];v3=p[6*8+col];v4=dctSqrt1d2*(p[1*8+col]-p[7*8+col])+2048>>12;v7=dctSqrt1d2*(p[1*8+col]+p[7*8+col])+2048>>12;v5=p[3*8+col];v6=p[5*8+col];t=v0-v1+1>>1;v0=v0+v1+1>>1;v1=t;t=v2*dctSin6+v3*dctCos6+2048>>12;v2=v2*dctCos6-v3*dctSin6+2048>>12;v3=t;t=v4-v6+1>>1;v4=v4+v6+1>>1;v6=t;t=v7+v5+1>>1;v5=v7-v5+1>>1;v7=t;t=v0-v3+1>>1;v0=v0+v3+1>>1;v3=t;t=v1-v2+1>>1;v1=v1+v2+1>>1;v2=t;t=v4*dctSin3+v7*dctCos3+2048>>12;v4=v4*dctCos3-v7*dctSin3+2048>>12;v7=t;t=v5*dctSin1+v6*dctCos1+2048>>12;v5=v5*dctCos1-v6*dctSin1+2048>>12;v6=t;p[0*8+col]=v0+v7;p[7*8+col]=v0-v7;p[1*8+col]=v1+v6;p[6*8+col]=v1-v6;p[2*8+col]=v2+v5;p[5*8+col]=v2-v5;p[3*8+col]=v3+v4;p[4*8+col]=v3-v4}for(i=0;i<64;++i){var index=blockBufferOffset+i;var q=p[i];q=q<=-2056/component.bitConversion?0:q>=2024/component.bitConversion?255/component.bitConversion:q+2056/component.bitConversion>>4;component.blockData[index]=q}}function buildComponentData(frame,component){var lines=[];var blocksPerLine=component.blocksPerLine;var blocksPerColumn=component.blocksPerColumn;var samplesPerLine=blocksPerLine<<3;var computationBuffer=new Int32Array(64);var i,j,ll=0;for(var blockRow=0;blockRow<blocksPerColumn;blockRow++){for(var blockCol=0;blockCol<blocksPerLine;blockCol++){var offset=getBlockBufferOffset(component,blockRow,blockCol);quantizeAndInverse(component,offset,computationBuffer)}}return component.blockData}function clampToUint8(a){return a<=0?0:a>=255?255:a|0}constructor.prototype={load:function load(path){var handleData=function(data){this.parse(data);if(this.onload)this.onload()}.bind(this);if(path.indexOf("data:")>-1){var offset=path.indexOf("base64,")+7;var data=atob(path.substring(offset));var arr=new Uint8Array(data.length);for(var i=data.length-1;i>=0;i--){arr[i]=data.charCodeAt(i)}handleData(data)}else{var xhr=new XMLHttpRequest;xhr.open("GET",path,true);xhr.responseType="arraybuffer";xhr.onload=function(){var data=new Uint8Array(xhr.response);handleData(data)}.bind(this);xhr.send(null)}},parse:function parse(data){function readUint16(){var value=data[offset]<<8|data[offset+1];offset+=2;return value}function readDataBlock(){var length=readUint16();var array=data.subarray(offset,offset+length-2);offset+=array.length;return array}function prepareComponents(frame){var mcusPerLine=Math.ceil(frame.samplesPerLine/8/frame.maxH);var mcusPerColumn=Math.ceil(frame.scanLines/8/frame.maxV);for(var i=0;i<frame.components.length;i++){component=frame.components[i];var blocksPerLine=Math.ceil(Math.ceil(frame.samplesPerLine/8)*component.h/frame.maxH);var blocksPerColumn=Math.ceil(Math.ceil(frame.scanLines/8)*component.v/frame.maxV);var blocksPerLineForMcu=mcusPerLine*component.h;var blocksPerColumnForMcu=mcusPerColumn*component.v;var blocksBufferSize=64*blocksPerColumnForMcu*(blocksPerLineForMcu+1);component.blockData=new Int16Array(blocksBufferSize);component.blocksPerLine=blocksPerLine;component.blocksPerColumn=blocksPerColumn}frame.mcusPerLine=mcusPerLine;frame.mcusPerColumn=mcusPerColumn}var offset=0,length=data.length;var jfif=null;var adobe=null;var pixels=null;var frame,resetInterval;var quantizationTables=[];var huffmanTablesAC=[],huffmanTablesDC=[];var fileMarker=readUint16();if(fileMarker!=65496){throw"SOI not found"}fileMarker=readUint16();while(fileMarker!=65497){var i,j,l;switch(fileMarker){case 65504:case 65505:case 65506:case 65507:case 65508:case 65509:case 65510:case 65511:case 65512:case 65513:case 65514:case 65515:case 65516:case 65517:case 65518:case 65519:case 65534:var appData=readDataBlock();if(fileMarker===65504){if(appData[0]===74&&appData[1]===70&&appData[2]===73&&appData[3]===70&&appData[4]===0){jfif={version:{major:appData[5],minor:appData[6]},densityUnits:appData[7],xDensity:appData[8]<<8|appData[9],yDensity:appData[10]<<8|appData[11],thumbWidth:appData[12],thumbHeight:appData[13],thumbData:appData.subarray(14,14+3*appData[12]*appData[13])}}}if(fileMarker===65518){if(appData[0]===65&&appData[1]===100&&appData[2]===111&&appData[3]===98&&appData[4]===101&&appData[5]===0){adobe={version:appData[6],flags0:appData[7]<<8|appData[8],flags1:appData[9]<<8|appData[10],transformCode:appData[11]}}}break;case 65499:var quantizationTablesLength=readUint16();var quantizationTablesEnd=quantizationTablesLength+offset-2;while(offset<quantizationTablesEnd){var quantizationTableSpec=data[offset++];var tableData=new Int32Array(64);if(quantizationTableSpec>>4===0){for(j=0;j<64;j++){var z=dctZigZag[j];tableData[z]=data[offset++]}}else if(quantizationTableSpec>>4===1){for(j=0;j<64;j++){var zz=dctZigZag[j];tableData[zz]=readUint16()}}else throw"DQT: invalid table spec";quantizationTables[quantizationTableSpec&15]=tableData}break;case 65472:case 65473:case 65474:if(frame){throw"Only single frame JPEGs supported"}readUint16();frame={};frame.extended=fileMarker===65473;frame.progressive=fileMarker===65474;frame.precision=data[offset++];frame.scanLines=readUint16();frame.samplesPerLine=readUint16();frame.components=[];frame.componentIds={};var componentsCount=data[offset++],componentId;var maxH=0,maxV=0;for(i=0;i<componentsCount;i++){componentId=data[offset];var h=data[offset+1]>>4;var v=data[offset+1]&15;if(maxH<h)maxH=h;if(maxV<v)maxV=v;var qId=data[offset+2];l=frame.components.push({h:h,v:v,quantizationTable:quantizationTables[qId],quantizationTableId:qId,bitConversion:255/((1<<frame.precision)-1)});frame.componentIds[componentId]=l-1;offset+=3}frame.maxH=maxH;frame.maxV=maxV;prepareComponents(frame);break;case 65476:var huffmanLength=readUint16();for(i=2;i<huffmanLength;){var huffmanTableSpec=data[offset++];var codeLengths=new Uint8Array(16);var codeLengthSum=0;for(j=0;j<16;j++,offset++)codeLengthSum+=codeLengths[j]=data[offset];var huffmanValues=new Uint8Array(codeLengthSum);for(j=0;j<codeLengthSum;j++,offset++)huffmanValues[j]=data[offset];i+=17+codeLengthSum;(huffmanTableSpec>>4===0?huffmanTablesDC:huffmanTablesAC)[huffmanTableSpec&15]=buildHuffmanTable(codeLengths,huffmanValues)}break;case 65501:readUint16();resetInterval=readUint16();break;case 65498:var scanLength=readUint16();var selectorsCount=data[offset++];var components=[],component;for(i=0;i<selectorsCount;i++){var componentIndex=frame.componentIds[data[offset++]];component=frame.components[componentIndex];var tableSpec=data[offset++];component.huffmanTableDC=huffmanTablesDC[tableSpec>>4];component.huffmanTableAC=huffmanTablesAC[tableSpec&15];components.push(component)}var spectralStart=data[offset++];var spectralEnd=data[offset++];var successiveApproximation=data[offset++];var processed=decodeScan(data,offset,frame,components,resetInterval,spectralStart,spectralEnd,successiveApproximation>>4,successiveApproximation&15);offset+=processed;break;default:if(data[offset-3]==255&&data[offset-2]>=192&&data[offset-2]<=254){offset-=3;break}throw"unknown JPEG marker "+fileMarker.toString(16)}fileMarker=readUint16()}this.width=frame.samplesPerLine;this.height=frame.scanLines;this.jfif=jfif;this.adobe=adobe;this.components=[];switch(frame.components.length){case 1:this.colorspace=ColorSpace.Grayscale;break;case 3:if(this.adobe)this.colorspace=ColorSpace.AdobeRGB;else this.colorspace=ColorSpace.RGB;break;case 4:this.colorspace=ColorSpace.CYMK;break;default:this.colorspace=ColorSpace.Unknown}for(var i=0;i<frame.components.length;i++){var component=frame.components[i];if(!component.quantizationTable&&component.quantizationTableId!==null)component.quantizationTable=quantizationTables[component.quantizationTableId];this.components.push({output:buildComponentData(frame,component),scaleX:component.h/frame.maxH,scaleY:component.v/frame.maxV,blocksPerLine:component.blocksPerLine,blocksPerColumn:component.blocksPerColumn,bitConversion:component.bitConversion})}},getData16:function getData16(width,height){if(this.components.length!==1)throw"Unsupported color mode";var scaleX=this.width/width,scaleY=this.height/height;var component,componentScaleX,componentScaleY;var x,y,i;var offset=0;var numComponents=this.components.length;var dataLength=width*height*numComponents;var data=new Uint16Array(dataLength);var componentLine;var lineData=new Uint16Array((this.components[0].blocksPerLine<<3)*this.components[0].blocksPerColumn*8);for(i=0;i<numComponents;i++){component=this.components[i];var blocksPerLine=component.blocksPerLine;var blocksPerColumn=component.blocksPerColumn;var samplesPerLine=blocksPerLine<<3;var j,k,ll=0;var lineOffset=0;for(var blockRow=0;blockRow<blocksPerColumn;blockRow++){var scanLine=blockRow<<3;for(var blockCol=0;blockCol<blocksPerLine;blockCol++){var bufferOffset=getBlockBufferOffset(component,blockRow,blockCol);var offset=0,sample=blockCol<<3;for(j=0;j<8;j++){var lineOffset=(scanLine+j)*samplesPerLine;for(k=0;k<8;k++){lineData[lineOffset+sample+k]=component.output[bufferOffset+offset++]}}}}componentScaleX=component.scaleX*scaleX;componentScaleY=component.scaleY*scaleY;offset=i;var cx,cy;var index;for(y=0;y<height;y++){for(x=0;x<width;x++){cy=0|y*componentScaleY;cx=0|x*componentScaleX;index=cy*samplesPerLine+cx;data[offset]=lineData[index];offset+=numComponents}}}return data},getData:function getData(width,height){var scaleX=this.width/width,scaleY=this.height/height;var component,componentScaleX,componentScaleY;var x,y,i;var offset=0;var Y,Cb,Cr,K,C,M,Ye,R,G,B;var colorTransform;var numComponents=this.components.length;var dataLength=width*height*numComponents;var data=new Uint8Array(dataLength);var componentLine;var lineData=new Uint8Array((this.components[0].blocksPerLine<<3)*this.components[0].blocksPerColumn*8);for(i=0;i<numComponents;i++){component=this.components[i];var blocksPerLine=component.blocksPerLine;var blocksPerColumn=component.blocksPerColumn;var samplesPerLine=blocksPerLine<<3;var j,k,ll=0;var lineOffset=0;for(var blockRow=0;blockRow<blocksPerColumn;blockRow++){var scanLine=blockRow<<3;for(var blockCol=0;blockCol<blocksPerLine;blockCol++){var bufferOffset=getBlockBufferOffset(component,blockRow,blockCol);var offset=0,sample=blockCol<<3;for(j=0;j<8;j++){var lineOffset=(scanLine+j)*samplesPerLine;for(k=0;k<8;k++){lineData[lineOffset+sample+k]=component.output[bufferOffset+offset++]*component.bitConversion}}}}componentScaleX=component.scaleX*scaleX;componentScaleY=component.scaleY*scaleY;offset=i;var cx,cy;var index;for(y=0;y<height;y++){for(x=0;x<width;x++){cy=0|y*componentScaleY;cx=0|x*componentScaleX;index=cy*samplesPerLine+cx;data[offset]=lineData[index];offset+=numComponents}}}switch(numComponents){case 1:case 2:break;case 3:colorTransform=true;if(this.adobe&&this.adobe.transformCode)colorTransform=true;else if(typeof this.colorTransform!=="undefined")colorTransform=!!this.colorTransform;if(colorTransform){for(i=0;i<dataLength;i+=numComponents){Y=data[i];Cb=data[i+1];Cr=data[i+2];R=clampToUint8(Y-179.456+1.402*Cr);G=clampToUint8(Y+135.459-.344*Cb-.714*Cr);B=clampToUint8(Y-226.816+1.772*Cb);data[i]=R;data[i+1]=G;data[i+2]=B}}break;case 4:if(!this.adobe)throw"Unsupported color mode (4 components)";colorTransform=false;if(this.adobe&&this.adobe.transformCode)colorTransform=true;else if(typeof this.colorTransform!=="undefined")colorTransform=!!this.colorTransform;if(colorTransform){for(i=0;i<dataLength;i+=numComponents){Y=data[i];Cb=data[i+1];Cr=data[i+2];C=clampToUint8(434.456-Y-1.402*Cr);M=clampToUint8(119.541-Y+.344*Cb+.714*Cr);Y=clampToUint8(481.816-Y-1.772*Cb);data[i]=C;data[i+1]=M;data[i+2]=Y}}break;default:throw"Unsupported color mode"}return data}};return constructor}();var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=JpegImage}},{}],2:[function(require,module,exports){"use strict";var JpxImage=function JpxImageClosure(){var SubbandsGainLog2={LL:0,LH:1,HL:1,HH:2};function JpxImage(){this.failOnCorruptedImage=false}JpxImage.prototype={parse:function JpxImage_parse(data){var head=readUint16(data,0);if(head===65359){this.parseCodestream(data,0,data.length);return}var position=0,length=data.length;while(position<length){var headerSize=8;var lbox=readUint32(data,position);var tbox=readUint32(data,position+4);position+=headerSize;if(lbox===1){lbox=readUint32(data,position)*4294967296+readUint32(data,position+4);position+=8;headerSize+=8}if(lbox===0){lbox=length-position+headerSize}if(lbox<headerSize){throw new Error("JPX Error: Invalid box field size")}var dataLength=lbox-headerSize;var jumpDataLength=true;switch(tbox){case 1785737832:jumpDataLength=false;break;case 1668246642:var method=data[position];var precedence=data[position+1];var approximation=data[position+2];if(method===1){var colorspace=readUint32(data,position+3);switch(colorspace){case 16:case 17:case 18:break;default:warn("Unknown colorspace "+colorspace);break}}else if(method===2){info("ICC profile not supported")}break;case 1785737827:this.parseCodestream(data,position,position+dataLength);break;case 1783636e3:if(218793738!==readUint32(data,position)){warn("Invalid JP2 signature")}break;case 1783634458:case 1718909296:case 1920099697:case 1919251232:case 1768449138:break;default:var headerType=String.fromCharCode(tbox>>24&255,tbox>>16&255,tbox>>8&255,tbox&255);warn("Unsupported header type "+tbox+" ("+headerType+")");break}if(jumpDataLength){position+=dataLength}}},parseImageProperties:function JpxImage_parseImageProperties(stream){var newByte=stream.getByte();while(newByte>=0){var oldByte=newByte;newByte=stream.getByte();var code=oldByte<<8|newByte;if(code===65361){stream.skip(4);var Xsiz=stream.getInt32()>>>0;var Ysiz=stream.getInt32()>>>0;var XOsiz=stream.getInt32()>>>0;var YOsiz=stream.getInt32()>>>0;stream.skip(16);var Csiz=stream.getUint16();this.width=Xsiz-XOsiz;this.height=Ysiz-YOsiz;this.componentsCount=Csiz;this.bitsPerComponent=8;return}}throw new Error("JPX Error: No size marker found in JPX stream")},parseCodestream:function JpxImage_parseCodestream(data,start,end){var context={};try{var doNotRecover=false;var position=start;while(position+1<end){var code=readUint16(data,position);position+=2;var length=0,j,sqcd,spqcds,spqcdSize,scalarExpounded,tile;switch(code){case 65359:context.mainHeader=true;break;case 65497:break;case 65361:length=readUint16(data,position);var siz={};siz.Xsiz=readUint32(data,position+4);siz.Ysiz=readUint32(data,position+8);siz.XOsiz=readUint32(data,position+12);siz.YOsiz=readUint32(data,position+16);siz.XTsiz=readUint32(data,position+20);siz.YTsiz=readUint32(data,position+24);siz.XTOsiz=readUint32(data,position+28);siz.YTOsiz=readUint32(data,position+32);var componentsCount=readUint16(data,position+36);siz.Csiz=componentsCount;var components=[];j=position+38;for(var i=0;i<componentsCount;i++){var component={precision:(data[j]&127)+1,isSigned:!!(data[j]&128),XRsiz:data[j+1],YRsiz:data[j+1]};calculateComponentDimensions(component,siz);components.push(component)}context.SIZ=siz;context.components=components;calculateTileGrids(context,components);context.QCC=[];context.COC=[];break;case 65372:length=readUint16(data,position);var qcd={};j=position+2;sqcd=data[j++];switch(sqcd&31){case 0:spqcdSize=8;scalarExpounded=true;break;case 1:spqcdSize=16;scalarExpounded=false;break;case 2:spqcdSize=16;scalarExpounded=true;break;default:throw new Error("JPX Error: Invalid SQcd value "+sqcd)}qcd.noQuantization=spqcdSize===8;qcd.scalarExpounded=scalarExpounded;qcd.guardBits=sqcd>>5;spqcds=[];while(j<length+position){var spqcd={};if(spqcdSize===8){spqcd.epsilon=data[j++]>>3;spqcd.mu=0}else{spqcd.epsilon=data[j]>>3;spqcd.mu=(data[j]&7)<<8|data[j+1];j+=2}spqcds.push(spqcd)}qcd.SPqcds=spqcds;if(context.mainHeader){context.QCD=qcd}else{context.currentTile.QCD=qcd;context.currentTile.QCC=[]}break;case 65373:length=readUint16(data,position);var qcc={};j=position+2;var cqcc;if(context.SIZ.Csiz<257){cqcc=data[j++]}else{cqcc=readUint16(data,j);j+=2}sqcd=data[j++];switch(sqcd&31){case 0:spqcdSize=8;scalarExpounded=true;break;case 1:spqcdSize=16;scalarExpounded=false;break;case 2:spqcdSize=16;scalarExpounded=true;break;default:throw new Error("JPX Error: Invalid SQcd value "+sqcd)}qcc.noQuantization=spqcdSize===8;qcc.scalarExpounded=scalarExpounded;qcc.guardBits=sqcd>>5;spqcds=[];while(j<length+position){spqcd={};if(spqcdSize===8){spqcd.epsilon=data[j++]>>3;spqcd.mu=0}else{spqcd.epsilon=data[j]>>3;spqcd.mu=(data[j]&7)<<8|data[j+1];j+=2}spqcds.push(spqcd)}qcc.SPqcds=spqcds;if(context.mainHeader){context.QCC[cqcc]=qcc}else{context.currentTile.QCC[cqcc]=qcc}break;case 65362:length=readUint16(data,position);var cod={};j=position+2;var scod=data[j++];cod.entropyCoderWithCustomPrecincts=!!(scod&1);cod.sopMarkerUsed=!!(scod&2);cod.ephMarkerUsed=!!(scod&4);cod.progressionOrder=data[j++];cod.layersCount=readUint16(data,j);j+=2;cod.multipleComponentTransform=data[j++];cod.decompositionLevelsCount=data[j++];cod.xcb=(data[j++]&15)+2;cod.ycb=(data[j++]&15)+2;var blockStyle=data[j++];cod.selectiveArithmeticCodingBypass=!!(blockStyle&1);cod.resetContextProbabilities=!!(blockStyle&2);cod.terminationOnEachCodingPass=!!(blockStyle&4);cod.verticalyStripe=!!(blockStyle&8);cod.predictableTermination=!!(blockStyle&16);cod.segmentationSymbolUsed=!!(blockStyle&32);cod.reversibleTransformation=data[j++];if(cod.entropyCoderWithCustomPrecincts){var precinctsSizes=[];while(j<length+position){var precinctsSize=data[j++];precinctsSizes.push({PPx:precinctsSize&15,PPy:precinctsSize>>4})}cod.precinctsSizes=precinctsSizes}var unsupported=[];if(cod.selectiveArithmeticCodingBypass){unsupported.push("selectiveArithmeticCodingBypass")}if(cod.resetContextProbabilities){unsupported.push("resetContextProbabilities")}if(cod.terminationOnEachCodingPass){unsupported.push("terminationOnEachCodingPass")}if(cod.verticalyStripe){unsupported.push("verticalyStripe")}if(cod.predictableTermination){unsupported.push("predictableTermination")}if(unsupported.length>0){doNotRecover=true;throw new Error("JPX Error: Unsupported COD options ("+unsupported.join(", ")+")")}if(context.mainHeader){context.COD=cod}else{context.currentTile.COD=cod;context.currentTile.COC=[]}break;case 65424:length=readUint16(data,position);tile={};tile.index=readUint16(data,position+2);tile.length=readUint32(data,position+4);tile.dataEnd=tile.length+position-2;tile.partIndex=data[position+8];tile.partsCount=data[position+9];context.mainHeader=false;if(tile.partIndex===0){tile.COD=context.COD;tile.COC=context.COC.slice(0);tile.QCD=context.QCD;tile.QCC=context.QCC.slice(0)}context.currentTile=tile;break;case 65427:tile=context.currentTile;if(tile.partIndex===0){initializeTile(context,tile.index);buildPackets(context)}length=tile.dataEnd-position;parseTilePackets(context,data,position,length);break;case 65365:case 65367:case 65368:case 65380:length=readUint16(data,position);break;case 65363:throw new Error("JPX Error: Codestream code 0xFF53 (COC) is "+"not implemented");default:throw new Error("JPX Error: Unknown codestream code: "+code.toString(16))}position+=length}}catch(e){if(doNotRecover||this.failOnCorruptedImage){throw e}else{warn("Trying to recover from "+e.message)}}this.tiles=transformComponents(context);this.width=context.SIZ.Xsiz-context.SIZ.XOsiz;this.height=context.SIZ.Ysiz-context.SIZ.YOsiz;this.componentsCount=context.SIZ.Csiz}};function calculateComponentDimensions(component,siz){component.x0=Math.ceil(siz.XOsiz/component.XRsiz);component.x1=Math.ceil(siz.Xsiz/component.XRsiz);component.y0=Math.ceil(siz.YOsiz/component.YRsiz);component.y1=Math.ceil(siz.Ysiz/component.YRsiz);component.width=component.x1-component.x0;component.height=component.y1-component.y0}function calculateTileGrids(context,components){var siz=context.SIZ;var tile,tiles=[];var numXtiles=Math.ceil((siz.Xsiz-siz.XTOsiz)/siz.XTsiz);var numYtiles=Math.ceil((siz.Ysiz-siz.YTOsiz)/siz.YTsiz);for(var q=0;q<numYtiles;q++){for(var p=0;p<numXtiles;p++){tile={};tile.tx0=Math.max(siz.XTOsiz+p*siz.XTsiz,siz.XOsiz);tile.ty0=Math.max(siz.YTOsiz+q*siz.YTsiz,siz.YOsiz);tile.tx1=Math.min(siz.XTOsiz+(p+1)*siz.XTsiz,siz.Xsiz);tile.ty1=Math.min(siz.YTOsiz+(q+1)*siz.YTsiz,siz.Ysiz);tile.width=tile.tx1-tile.tx0;tile.height=tile.ty1-tile.ty0;tile.components=[];tiles.push(tile)}}context.tiles=tiles;var componentsCount=siz.Csiz;for(var i=0,ii=componentsCount;i<ii;i++){var component=components[i];for(var j=0,jj=tiles.length;j<jj;j++){var tileComponent={};tile=tiles[j];tileComponent.tcx0=Math.ceil(tile.tx0/component.XRsiz);tileComponent.tcy0=Math.ceil(tile.ty0/component.YRsiz);tileComponent.tcx1=Math.ceil(tile.tx1/component.XRsiz);tileComponent.tcy1=Math.ceil(tile.ty1/component.YRsiz);tileComponent.width=tileComponent.tcx1-tileComponent.tcx0;tileComponent.height=tileComponent.tcy1-tileComponent.tcy0;tile.components[i]=tileComponent}}}function getBlocksDimensions(context,component,r){var codOrCoc=component.codingStyleParameters;var result={};if(!codOrCoc.entropyCoderWithCustomPrecincts){result.PPx=15;result.PPy=15}else{result.PPx=codOrCoc.precinctsSizes[r].PPx;result.PPy=codOrCoc.precinctsSizes[r].PPy}result.xcb_=r>0?Math.min(codOrCoc.xcb,result.PPx-1):Math.min(codOrCoc.xcb,result.PPx);result.ycb_=r>0?Math.min(codOrCoc.ycb,result.PPy-1):Math.min(codOrCoc.ycb,result.PPy);return result}function buildPrecincts(context,resolution,dimensions){var precinctWidth=1<<dimensions.PPx;var precinctHeight=1<<dimensions.PPy;var isZeroRes=resolution.resLevel===0;var precinctWidthInSubband=1<<dimensions.PPx+(isZeroRes?0:-1);var precinctHeightInSubband=1<<dimensions.PPy+(isZeroRes?0:-1);var numprecinctswide=resolution.trx1>resolution.trx0?Math.ceil(resolution.trx1/precinctWidth)-Math.floor(resolution.trx0/precinctWidth):0;var numprecinctshigh=resolution.try1>resolution.try0?Math.ceil(resolution.try1/precinctHeight)-Math.floor(resolution.try0/precinctHeight):0;var numprecincts=numprecinctswide*numprecinctshigh;resolution.precinctParameters={precinctWidth:precinctWidth,precinctHeight:precinctHeight,numprecinctswide:numprecinctswide,numprecinctshigh:numprecinctshigh,numprecincts:numprecincts,precinctWidthInSubband:precinctWidthInSubband,precinctHeightInSubband:precinctHeightInSubband}}function buildCodeblocks(context,subband,dimensions){var xcb_=dimensions.xcb_;var ycb_=dimensions.ycb_;var codeblockWidth=1<<xcb_;var codeblockHeight=1<<ycb_;var cbx0=subband.tbx0>>xcb_;var cby0=subband.tby0>>ycb_;var cbx1=subband.tbx1+codeblockWidth-1>>xcb_;var cby1=subband.tby1+codeblockHeight-1>>ycb_;var precinctParameters=subband.resolution.precinctParameters;var codeblocks=[];var precincts=[];var i,j,codeblock,precinctNumber;for(j=cby0;j<cby1;j++){for(i=cbx0;i<cbx1;i++){codeblock={cbx:i,cby:j,tbx0:codeblockWidth*i,tby0:codeblockHeight*j,tbx1:codeblockWidth*(i+1),tby1:codeblockHeight*(j+1)};codeblock.tbx0_=Math.max(subband.tbx0,codeblock.tbx0);codeblock.tby0_=Math.max(subband.tby0,codeblock.tby0);codeblock.tbx1_=Math.min(subband.tbx1,codeblock.tbx1);codeblock.tby1_=Math.min(subband.tby1,codeblock.tby1);var pi=Math.floor((codeblock.tbx0_-subband.tbx0)/precinctParameters.precinctWidthInSubband);var pj=Math.floor((codeblock.tby0_-subband.tby0)/precinctParameters.precinctHeightInSubband);precinctNumber=pi+pj*precinctParameters.numprecinctswide;codeblock.precinctNumber=precinctNumber;codeblock.subbandType=subband.type;codeblock.Lblock=3;if(codeblock.tbx1_<=codeblock.tbx0_||codeblock.tby1_<=codeblock.tby0_){continue}codeblocks.push(codeblock);var precinct=precincts[precinctNumber];if(precinct!==undefined){if(i<precinct.cbxMin){precinct.cbxMin=i}else if(i>precinct.cbxMax){precinct.cbxMax=i}if(j<precinct.cbyMin){precinct.cbxMin=j}else if(j>precinct.cbyMax){precinct.cbyMax=j}}else{precincts[precinctNumber]=precinct={cbxMin:i,cbyMin:j,cbxMax:i,cbyMax:j}}codeblock.precinct=precinct}}subband.codeblockParameters={codeblockWidth:xcb_,codeblockHeight:ycb_,numcodeblockwide:cbx1-cbx0+1,numcodeblockhigh:cby1-cby0+1};subband.codeblocks=codeblocks;subband.precincts=precincts}function createPacket(resolution,precinctNumber,layerNumber){var precinctCodeblocks=[];var subbands=resolution.subbands;for(var i=0,ii=subbands.length;i<ii;i++){var subband=subbands[i];var codeblocks=subband.codeblocks;for(var j=0,jj=codeblocks.length;j<jj;j++){
var codeblock=codeblocks[j];if(codeblock.precinctNumber!==precinctNumber){continue}precinctCodeblocks.push(codeblock)}}return{layerNumber:layerNumber,codeblocks:precinctCodeblocks}}function LayerResolutionComponentPositionIterator(context){var siz=context.SIZ;var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var layersCount=tile.codingStyleDefaultParameters.layersCount;var componentsCount=siz.Csiz;var maxDecompositionLevelsCount=0;for(var q=0;q<componentsCount;q++){maxDecompositionLevelsCount=Math.max(maxDecompositionLevelsCount,tile.components[q].codingStyleParameters.decompositionLevelsCount)}var l=0,r=0,i=0,k=0;this.nextPacket=function JpxImage_nextPacket(){for(;l<layersCount;l++){for(;r<=maxDecompositionLevelsCount;r++){for(;i<componentsCount;i++){var component=tile.components[i];if(r>component.codingStyleParameters.decompositionLevelsCount){continue}var resolution=component.resolutions[r];var numprecincts=resolution.precinctParameters.numprecincts;for(;k<numprecincts;){var packet=createPacket(resolution,k,l);k++;return packet}k=0}i=0}r=0}}}function ResolutionLayerComponentPositionIterator(context){var siz=context.SIZ;var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var layersCount=tile.codingStyleDefaultParameters.layersCount;var componentsCount=siz.Csiz;var maxDecompositionLevelsCount=0;for(var q=0;q<componentsCount;q++){maxDecompositionLevelsCount=Math.max(maxDecompositionLevelsCount,tile.components[q].codingStyleParameters.decompositionLevelsCount)}var r=0,l=0,i=0,k=0;this.nextPacket=function JpxImage_nextPacket(){for(;r<=maxDecompositionLevelsCount;r++){for(;l<layersCount;l++){for(;i<componentsCount;i++){var component=tile.components[i];if(r>component.codingStyleParameters.decompositionLevelsCount){continue}var resolution=component.resolutions[r];var numprecincts=resolution.precinctParameters.numprecincts;for(;k<numprecincts;){var packet=createPacket(resolution,k,l);k++;return packet}k=0}i=0}l=0}}}function ResolutionPositionComponentLayerIterator(context){var siz=context.SIZ;var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var layersCount=tile.codingStyleDefaultParameters.layersCount;var componentsCount=siz.Csiz;var l,r,c,p;var maxDecompositionLevelsCount=0;for(c=0;c<componentsCount;c++){var component=tile.components[c];maxDecompositionLevelsCount=Math.max(maxDecompositionLevelsCount,component.codingStyleParameters.decompositionLevelsCount)}var maxNumPrecinctsInLevel=new Int32Array(maxDecompositionLevelsCount+1);for(r=0;r<=maxDecompositionLevelsCount;++r){var maxNumPrecincts=0;for(c=0;c<componentsCount;++c){var resolutions=tile.components[c].resolutions;if(r<resolutions.length){maxNumPrecincts=Math.max(maxNumPrecincts,resolutions[r].precinctParameters.numprecincts)}}maxNumPrecinctsInLevel[r]=maxNumPrecincts}l=0;r=0;c=0;p=0;this.nextPacket=function JpxImage_nextPacket(){for(;r<=maxDecompositionLevelsCount;r++){for(;p<maxNumPrecinctsInLevel[r];p++){for(;c<componentsCount;c++){var component=tile.components[c];if(r>component.codingStyleParameters.decompositionLevelsCount){continue}var resolution=component.resolutions[r];var numprecincts=resolution.precinctParameters.numprecincts;if(p>=numprecincts){continue}for(;l<layersCount;){var packet=createPacket(resolution,p,l);l++;return packet}l=0}c=0}p=0}}}function PositionComponentResolutionLayerIterator(context){var siz=context.SIZ;var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var layersCount=tile.codingStyleDefaultParameters.layersCount;var componentsCount=siz.Csiz;var precinctsSizes=getPrecinctSizesInImageScale(tile);var precinctsIterationSizes=precinctsSizes;var l=0,r=0,c=0,px=0,py=0;this.nextPacket=function JpxImage_nextPacket(){for(;py<precinctsIterationSizes.maxNumHigh;py++){for(;px<precinctsIterationSizes.maxNumWide;px++){for(;c<componentsCount;c++){var component=tile.components[c];var decompositionLevelsCount=component.codingStyleParameters.decompositionLevelsCount;for(;r<=decompositionLevelsCount;r++){var resolution=component.resolutions[r];var sizeInImageScale=precinctsSizes.components[c].resolutions[r];var k=getPrecinctIndexIfExist(px,py,sizeInImageScale,precinctsIterationSizes,resolution);if(k===null){continue}for(;l<layersCount;){var packet=createPacket(resolution,k,l);l++;return packet}l=0}r=0}c=0}px=0}}}function ComponentPositionResolutionLayerIterator(context){var siz=context.SIZ;var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var layersCount=tile.codingStyleDefaultParameters.layersCount;var componentsCount=siz.Csiz;var precinctsSizes=getPrecinctSizesInImageScale(tile);var l=0,r=0,c=0,px=0,py=0;this.nextPacket=function JpxImage_nextPacket(){for(;c<componentsCount;++c){var component=tile.components[c];var precinctsIterationSizes=precinctsSizes.components[c];var decompositionLevelsCount=component.codingStyleParameters.decompositionLevelsCount;for(;py<precinctsIterationSizes.maxNumHigh;py++){for(;px<precinctsIterationSizes.maxNumWide;px++){for(;r<=decompositionLevelsCount;r++){var resolution=component.resolutions[r];var sizeInImageScale=precinctsIterationSizes.resolutions[r];var k=getPrecinctIndexIfExist(px,py,sizeInImageScale,precinctsIterationSizes,resolution);if(k===null){continue}for(;l<layersCount;){var packet=createPacket(resolution,k,l);l++;return packet}l=0}r=0}px=0}py=0}}}function getPrecinctIndexIfExist(pxIndex,pyIndex,sizeInImageScale,precinctIterationSizes,resolution){var posX=pxIndex*precinctIterationSizes.minWidth;var posY=pyIndex*precinctIterationSizes.minHeight;if(posX%sizeInImageScale.width!==0||posY%sizeInImageScale.height!==0){return null}var startPrecinctRowIndex=posY/sizeInImageScale.width*resolution.precinctParameters.numprecinctswide;return posX/sizeInImageScale.height+startPrecinctRowIndex}function getPrecinctSizesInImageScale(tile){var componentsCount=tile.components.length;var minWidth=Number.MAX_VALUE;var minHeight=Number.MAX_VALUE;var maxNumWide=0;var maxNumHigh=0;var sizePerComponent=new Array(componentsCount);for(var c=0;c<componentsCount;c++){var component=tile.components[c];var decompositionLevelsCount=component.codingStyleParameters.decompositionLevelsCount;var sizePerResolution=new Array(decompositionLevelsCount+1);var minWidthCurrentComponent=Number.MAX_VALUE;var minHeightCurrentComponent=Number.MAX_VALUE;var maxNumWideCurrentComponent=0;var maxNumHighCurrentComponent=0;var scale=1;for(var r=decompositionLevelsCount;r>=0;--r){var resolution=component.resolutions[r];var widthCurrentResolution=scale*resolution.precinctParameters.precinctWidth;var heightCurrentResolution=scale*resolution.precinctParameters.precinctHeight;minWidthCurrentComponent=Math.min(minWidthCurrentComponent,widthCurrentResolution);minHeightCurrentComponent=Math.min(minHeightCurrentComponent,heightCurrentResolution);maxNumWideCurrentComponent=Math.max(maxNumWideCurrentComponent,resolution.precinctParameters.numprecinctswide);maxNumHighCurrentComponent=Math.max(maxNumHighCurrentComponent,resolution.precinctParameters.numprecinctshigh);sizePerResolution[r]={width:widthCurrentResolution,height:heightCurrentResolution};scale<<=1}minWidth=Math.min(minWidth,minWidthCurrentComponent);minHeight=Math.min(minHeight,minHeightCurrentComponent);maxNumWide=Math.max(maxNumWide,maxNumWideCurrentComponent);maxNumHigh=Math.max(maxNumHigh,maxNumHighCurrentComponent);sizePerComponent[c]={resolutions:sizePerResolution,minWidth:minWidthCurrentComponent,minHeight:minHeightCurrentComponent,maxNumWide:maxNumWideCurrentComponent,maxNumHigh:maxNumHighCurrentComponent}}return{components:sizePerComponent,minWidth:minWidth,minHeight:minHeight,maxNumWide:maxNumWide,maxNumHigh:maxNumHigh}}function buildPackets(context){var siz=context.SIZ;var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var componentsCount=siz.Csiz;for(var c=0;c<componentsCount;c++){var component=tile.components[c];var decompositionLevelsCount=component.codingStyleParameters.decompositionLevelsCount;var resolutions=[];var subbands=[];for(var r=0;r<=decompositionLevelsCount;r++){var blocksDimensions=getBlocksDimensions(context,component,r);var resolution={};var scale=1<<decompositionLevelsCount-r;resolution.trx0=Math.ceil(component.tcx0/scale);resolution.try0=Math.ceil(component.tcy0/scale);resolution.trx1=Math.ceil(component.tcx1/scale);resolution.try1=Math.ceil(component.tcy1/scale);resolution.resLevel=r;buildPrecincts(context,resolution,blocksDimensions);resolutions.push(resolution);var subband;if(r===0){subband={};subband.type="LL";subband.tbx0=Math.ceil(component.tcx0/scale);subband.tby0=Math.ceil(component.tcy0/scale);subband.tbx1=Math.ceil(component.tcx1/scale);subband.tby1=Math.ceil(component.tcy1/scale);subband.resolution=resolution;buildCodeblocks(context,subband,blocksDimensions);subbands.push(subband);resolution.subbands=[subband]}else{var bscale=1<<decompositionLevelsCount-r+1;var resolutionSubbands=[];subband={};subband.type="HL";subband.tbx0=Math.ceil(component.tcx0/bscale-.5);subband.tby0=Math.ceil(component.tcy0/bscale);subband.tbx1=Math.ceil(component.tcx1/bscale-.5);subband.tby1=Math.ceil(component.tcy1/bscale);subband.resolution=resolution;buildCodeblocks(context,subband,blocksDimensions);subbands.push(subband);resolutionSubbands.push(subband);subband={};subband.type="LH";subband.tbx0=Math.ceil(component.tcx0/bscale);subband.tby0=Math.ceil(component.tcy0/bscale-.5);subband.tbx1=Math.ceil(component.tcx1/bscale);subband.tby1=Math.ceil(component.tcy1/bscale-.5);subband.resolution=resolution;buildCodeblocks(context,subband,blocksDimensions);subbands.push(subband);resolutionSubbands.push(subband);subband={};subband.type="HH";subband.tbx0=Math.ceil(component.tcx0/bscale-.5);subband.tby0=Math.ceil(component.tcy0/bscale-.5);subband.tbx1=Math.ceil(component.tcx1/bscale-.5);subband.tby1=Math.ceil(component.tcy1/bscale-.5);subband.resolution=resolution;buildCodeblocks(context,subband,blocksDimensions);subbands.push(subband);resolutionSubbands.push(subband);resolution.subbands=resolutionSubbands}}component.resolutions=resolutions;component.subbands=subbands}var progressionOrder=tile.codingStyleDefaultParameters.progressionOrder;switch(progressionOrder){case 0:tile.packetsIterator=new LayerResolutionComponentPositionIterator(context);break;case 1:tile.packetsIterator=new ResolutionLayerComponentPositionIterator(context);break;case 2:tile.packetsIterator=new ResolutionPositionComponentLayerIterator(context);break;case 3:tile.packetsIterator=new PositionComponentResolutionLayerIterator(context);break;case 4:tile.packetsIterator=new ComponentPositionResolutionLayerIterator(context);break;default:throw new Error("JPX Error: Unsupported progression order "+progressionOrder)}}function parseTilePackets(context,data,offset,dataLength){var position=0;var buffer,bufferSize=0,skipNextBit=false;function readBits(count){while(bufferSize<count){if(offset+position>=data.length){throw new Error("Unexpected EOF")}var b=data[offset+position];position++;if(skipNextBit){buffer=buffer<<7|b;bufferSize+=7;skipNextBit=false}else{buffer=buffer<<8|b;bufferSize+=8}if(b===255){skipNextBit=true}}bufferSize-=count;return buffer>>>bufferSize&(1<<count)-1}function skipMarkerIfEqual(value){if(data[offset+position-1]===255&&data[offset+position]===value){skipBytes(1);return true}else if(data[offset+position]===255&&data[offset+position+1]===value){skipBytes(2);return true}return false}function skipBytes(count){position+=count}function alignToByte(){bufferSize=0;if(skipNextBit){position++;skipNextBit=false}}function readCodingpasses(){if(readBits(1)===0){return 1}if(readBits(1)===0){return 2}var value=readBits(2);if(value<3){return value+3}value=readBits(5);if(value<31){return value+6}value=readBits(7);return value+37}var tileIndex=context.currentTile.index;var tile=context.tiles[tileIndex];var sopMarkerUsed=context.COD.sopMarkerUsed;var ephMarkerUsed=context.COD.ephMarkerUsed;var packetsIterator=tile.packetsIterator;while(position<dataLength){try{alignToByte();if(sopMarkerUsed&&skipMarkerIfEqual(145)){skipBytes(4)}var packet=packetsIterator.nextPacket();if(packet===undefined){return}if(!readBits(1)){continue}var layerNumber=packet.layerNumber;var queue=[],codeblock;for(var i=0,ii=packet.codeblocks.length;i<ii;i++){codeblock=packet.codeblocks[i];var precinct=codeblock.precinct;var codeblockColumn=codeblock.cbx-precinct.cbxMin;var codeblockRow=codeblock.cby-precinct.cbyMin;var codeblockIncluded=false;var firstTimeInclusion=false;var valueReady;if(codeblock["included"]!==undefined){codeblockIncluded=!!readBits(1)}else{precinct=codeblock.precinct;var inclusionTree,zeroBitPlanesTree;if(precinct["inclusionTree"]!==undefined){inclusionTree=precinct.inclusionTree}else{var width=precinct.cbxMax-precinct.cbxMin+1;var height=precinct.cbyMax-precinct.cbyMin+1;inclusionTree=new InclusionTree(width,height);zeroBitPlanesTree=new TagTree(width,height);precinct.inclusionTree=inclusionTree;precinct.zeroBitPlanesTree=zeroBitPlanesTree}inclusionTree.reset(codeblockColumn,codeblockRow,layerNumber);while(true){if(position>=data.length){return}if(inclusionTree.isAboveThreshold()){break}if(inclusionTree.isKnown()){inclusionTree.nextLevel();continue}if(readBits(1)){inclusionTree.setKnown();if(inclusionTree.isLeaf()){codeblock.included=true;codeblockIncluded=firstTimeInclusion=true;break}else{inclusionTree.nextLevel()}}else{inclusionTree.incrementValue()}}}if(!codeblockIncluded){continue}if(firstTimeInclusion){zeroBitPlanesTree=precinct.zeroBitPlanesTree;zeroBitPlanesTree.reset(codeblockColumn,codeblockRow);while(true){if(position>=data.length){return}if(readBits(1)){valueReady=!zeroBitPlanesTree.nextLevel();if(valueReady){break}}else{zeroBitPlanesTree.incrementValue()}}codeblock.zeroBitPlanes=zeroBitPlanesTree.value}var codingpasses=readCodingpasses();while(readBits(1)){codeblock.Lblock++}var codingpassesLog2=log2(codingpasses);var bits=(codingpasses<1<<codingpassesLog2?codingpassesLog2-1:codingpassesLog2)+codeblock.Lblock;var codedDataLength=readBits(bits);queue.push({codeblock:codeblock,codingpasses:codingpasses,dataLength:codedDataLength})}alignToByte();if(ephMarkerUsed){skipMarkerIfEqual(146)}while(queue.length>0){var packetItem=queue.shift();codeblock=packetItem.codeblock;if(codeblock["data"]===undefined){codeblock.data=[]}codeblock.data.push({data:data,start:offset+position,end:offset+position+packetItem.dataLength,codingpasses:packetItem.codingpasses});position+=packetItem.dataLength}}catch(e){return}}return position}function copyCoefficients(coefficients,levelWidth,levelHeight,subband,delta,mb,reversible,segmentationSymbolUsed){var x0=subband.tbx0;var y0=subband.tby0;var width=subband.tbx1-subband.tbx0;var codeblocks=subband.codeblocks;var right=subband.type.charAt(0)==="H"?1:0;var bottom=subband.type.charAt(1)==="H"?levelWidth:0;for(var i=0,ii=codeblocks.length;i<ii;++i){var codeblock=codeblocks[i];var blockWidth=codeblock.tbx1_-codeblock.tbx0_;var blockHeight=codeblock.tby1_-codeblock.tby0_;if(blockWidth===0||blockHeight===0){continue}if(codeblock["data"]===undefined){continue}var bitModel,currentCodingpassType;bitModel=new BitModel(blockWidth,blockHeight,codeblock.subbandType,codeblock.zeroBitPlanes,mb);currentCodingpassType=2;var data=codeblock.data,totalLength=0,codingpasses=0;var j,jj,dataItem;for(j=0,jj=data.length;j<jj;j++){dataItem=data[j];totalLength+=dataItem.end-dataItem.start;codingpasses+=dataItem.codingpasses}var encodedData=new Int16Array(totalLength);var position=0;for(j=0,jj=data.length;j<jj;j++){dataItem=data[j];var chunk=dataItem.data.subarray(dataItem.start,dataItem.end);encodedData.set(chunk,position);position+=chunk.length}var decoder=new ArithmeticDecoder(encodedData,0,totalLength);bitModel.setDecoder(decoder);for(j=0;j<codingpasses;j++){switch(currentCodingpassType){case 0:bitModel.runSignificancePropogationPass();break;case 1:bitModel.runMagnitudeRefinementPass();break;case 2:bitModel.runCleanupPass();if(segmentationSymbolUsed){bitModel.checkSegmentationSymbol()}break}currentCodingpassType=(currentCodingpassType+1)%3}var offset=codeblock.tbx0_-x0+(codeblock.tby0_-y0)*width;var sign=bitModel.coefficentsSign;var magnitude=bitModel.coefficentsMagnitude;var bitsDecoded=bitModel.bitsDecoded;var magnitudeCorrection=reversible?0:.5;var k,n,nb;position=0;var interleave=subband.type!=="LL";for(j=0;j<blockHeight;j++){var row=offset/width|0;var levelOffset=2*row*(levelWidth-width)+right+bottom;for(k=0;k<blockWidth;k++){n=magnitude[position];if(n!==0){n=(n+magnitudeCorrection)*delta;if(sign[position]!==0){n=-n}nb=bitsDecoded[position];var pos=interleave?levelOffset+(offset<<1):offset;if(reversible&&nb>=mb){coefficients[pos]=n}else{coefficients[pos]=n*(1<<mb-nb)}}offset++;position++}offset+=width-blockWidth}}}function transformTile(context,tile,c){var component=tile.components[c];var codingStyleParameters=component.codingStyleParameters;var quantizationParameters=component.quantizationParameters;var decompositionLevelsCount=codingStyleParameters.decompositionLevelsCount;var spqcds=quantizationParameters.SPqcds;var scalarExpounded=quantizationParameters.scalarExpounded;var guardBits=quantizationParameters.guardBits;var segmentationSymbolUsed=codingStyleParameters.segmentationSymbolUsed;var precision=context.components[c].precision;var reversible=codingStyleParameters.reversibleTransformation;var transform=reversible?new ReversibleTransform:new IrreversibleTransform;var subbandCoefficients=[];var b=0;for(var i=0;i<=decompositionLevelsCount;i++){var resolution=component.resolutions[i];var width=resolution.trx1-resolution.trx0;var height=resolution.try1-resolution.try0;var coefficients=new Float32Array(width*height);for(var j=0,jj=resolution.subbands.length;j<jj;j++){var mu,epsilon;if(!scalarExpounded){mu=spqcds[0].mu;epsilon=spqcds[0].epsilon+(i>0?1-i:0)}else{mu=spqcds[b].mu;epsilon=spqcds[b].epsilon;b++}var subband=resolution.subbands[j];var gainLog2=SubbandsGainLog2[subband.type];var delta=reversible?1:Math.pow(2,precision+gainLog2-epsi