jpeg-lossless-decoder-js - npm Package Compare versions

Comparing version 1.2.10 to 1.2.11

package.json

 {
   "name": "jpeg-lossless-decoder-js",
-  "version": "1.2.10",
+  "version": "1.2.11",
   "description": "A JavaScript JPEG Lossless decoder.",
@@ -5,0 +5,0 @@ "main": "src/main.js",

release/current/lossless-min.js

@@ -1,1 +0,1 @@
-(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.jpeg=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){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ComponentSpec=jpeg.lossless.ComponentSpec||function(){this.hSamp=0;this.quantTableSel=0;this.vSamp=0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.ComponentSpec}},{}],2:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||function(data,offset,length){this.buffer=new DataView(data,offset,length);this.index=0};jpeg.lossless.DataStream.prototype.get16=function(){var value=this.buffer.getUint16(this.index,false);this.index+=2;return value};jpeg.lossless.DataStream.prototype.get8=function(){var value=this.buffer.getUint8(this.index);this.index+=1;return value};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.DataStream}},{}],3:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.HuffmanTable=jpeg.lossless.HuffmanTable||(typeof require!=="undefined"?require("./huffman-table.js"):null);jpeg.lossless.QuantizationTable=jpeg.lossless.QuantizationTable||(typeof require!=="undefined"?require("./quantization-table.js"):null);jpeg.lossless.ScanHeader=jpeg.lossless.ScanHeader||(typeof require!=="undefined"?require("./scan-header.js"):null);jpeg.lossless.FrameHeader=jpeg.lossless.FrameHeader||(typeof require!=="undefined"?require("./frame-header.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);jpeg.lossless.Decoder=jpeg.lossless.Decoder||function(buffer,numBytes){this.buffer=buffer;this.frame=new jpeg.lossless.FrameHeader;this.huffTable=new jpeg.lossless.HuffmanTable;this.quantTable=new jpeg.lossless.QuantizationTable;this.scan=new jpeg.lossless.ScanHeader;this.DU=jpeg.lossless.Utils.createArray(10,4,64);this.HuffTab=jpeg.lossless.Utils.createArray(4,2,50*256);this.IDCT_Source=[];this.nBlock=[];this.acTab=jpeg.lossless.Utils.createArray(10,1);this.dcTab=jpeg.lossless.Utils.createArray(10,1);this.qTab=jpeg.lossless.Utils.createArray(10,1);this.marker=0;this.markerIndex=0;this.numComp=0;this.restartInterval=0;this.selection=0;this.xDim=0;this.yDim=0;this.xLoc=0;this.yLoc=0;this.numBytes=0;this.outputData=null;this.restarting=false;this.mask=0;if(typeof numBytes!=="undefined"){this.numBytes=numBytes}};jpeg.lossless.Decoder.IDCT_P=[0,5,40,16,45,2,7,42,21,56,8,61,18,47,1,4,41,23,58,13,32,24,37,10,63,17,44,3,6,43,20,57,15,34,29,48,53,26,39,9,60,19,46,22,59,12,33,31,50,55,25,36,11,62,14,35,28,49,52,27,38,30,51,54];jpeg.lossless.Decoder.TABLE=[0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18,24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63];jpeg.lossless.Decoder.MAX_HUFFMAN_SUBTREE=50;jpeg.lossless.Decoder.MSB=2147483648;jpeg.lossless.Decoder.RESTART_MARKER_BEGIN=65488;jpeg.lossless.Decoder.RESTART_MARKER_END=65495;jpeg.lossless.Decoder.prototype.decompress=function(buffer,offset,length){return this.decode(buffer,offset,length).buffer};jpeg.lossless.Decoder.prototype.decode=function(buffer,offset,length,numBytes){var current,scanNum=0,pred=[],i,compN,temp=[],index=[],mcuNum;if(typeof buffer!=="undefined"){this.buffer=buffer}if(typeof numBytes!=="undefined"){this.numBytes=numBytes}this.stream=new jpeg.lossless.DataStream(this.buffer,offset,length);this.buffer=null;this.xLoc=0;this.yLoc=0;current=this.stream.get16();if(current!==65496){throw new Error("Not a JPEG file")}current=this.stream.get16();while(current>>4!==4092||current===65476){switch(current){case 65476:this.huffTable.read(this.stream,this.HuffTab);break;case 65484:throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");case 65499:this.quantTable.read(this.stream,jpeg.lossless.Decoder.TABLE);break;case 65501:this.restartInterval=this.readNumber();break;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:this.readApp();break;case 65534:this.readComment();break;default:if(current>>8!==255){throw new Error("ERROR: format throw new IOException! (decode)")}}current=this.stream.get16()}if(current<65472||current>65479){throw new Error("ERROR: could not handle arithmetic code!")}this.frame.read(this.stream);current=this.stream.get16();do{while(current!==65498){switch(current){case 65476:this.huffTable.read(this.stream,this.HuffTab);break;case 65484:throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");case 65499:this.quantTable.read(this.stream,jpeg.lossless.Decoder.TABLE);break;case 65501:this.restartInterval=this.readNumber();break;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:this.readApp();break;case 65534:this.readComment();break;default:if(current>>8!==255){throw new Error("ERROR: format throw new IOException! (Parser.decode)")}}current=this.stream.get16()}this.precision=this.frame.precision;this.components=this.frame.components;if(!this.numBytes){this.numBytes=parseInt(Math.ceil(this.precision/8))}if(this.numBytes==1){this.mask=255}else{this.mask=65535}this.scan.read(this.stream);this.numComp=this.scan.numComp;this.selection=this.scan.selection;if(this.numBytes===1){if(this.numComp===3){this.getter=this.getValueRGB;this.setter=this.setValueRGB;this.output=this.outputRGB}else{this.getter=this.getValue8;this.setter=this.setValue8;this.output=this.outputSingle}}else{this.getter=this.getValue16;this.setter=this.setValue16;this.output=this.outputSingle}switch(this.selection){case 2:this.selector=this.select2;break;case 3:this.selector=this.select3;break;case 4:this.selector=this.select4;break;case 5:this.selector=this.select5;break;case 6:this.selector=this.select6;break;case 7:this.selector=this.select7;break;default:this.selector=this.select1;break}this.scanComps=this.scan.components;this.quantTables=this.quantTable.quantTables;for(i=0;i<this.numComp;i+=1){compN=this.scanComps[i].scanCompSel;this.qTab[i]=this.quantTables[this.components[compN].quantTableSel];this.nBlock[i]=this.components[compN].vSamp*this.components[compN].hSamp;this.dcTab[i]=this.HuffTab[this.scanComps[i].dcTabSel][0];this.acTab[i]=this.HuffTab[this.scanComps[i].acTabSel][1]}this.xDim=this.frame.dimX;this.yDim=this.frame.dimY;this.outputData=new DataView(new ArrayBuffer(this.xDim*this.yDim*this.numBytes*this.numComp));scanNum+=1;while(true){temp[0]=0;index[0]=0;for(i=0;i<10;i+=1){pred[i]=1<<this.precision-1}if(this.restartInterval===0){current=this.decodeUnit(pred,temp,index);while(current===0&&(this.xLoc<this.xDim&&this.yLoc<this.yDim)){this.output(pred);current=this.decodeUnit(pred,temp,index)}break}for(mcuNum=0;mcuNum<this.restartInterval;mcuNum+=1){this.restarting=mcuNum==0;current=this.decodeUnit(pred,temp,index);this.output(pred);if(current!==0){break}}if(current===0){if(this.markerIndex!==0){current=65280|this.marker;this.markerIndex=0}else{current=this.stream.get16()}}if(!(current>=jpeg.lossless.Decoder.RESTART_MARKER_BEGIN&&current<=jpeg.lossless.Decoder.RESTART_MARKER_END)){break}}if(current===65500&&scanNum===1){this.readNumber();current=this.stream.get16()}}while(current!==65497&&(this.xLoc<this.xDim&&this.yLoc<this.yDim)&&scanNum===0);return this.outputData};jpeg.lossless.Decoder.prototype.decodeUnit=function(prev,temp,index){if(this.numComp==1){return this.decodeSingle(prev,temp,index)}else if(this.numComp==3){return this.decodeRGB(prev,temp,index)}else{return-1}};jpeg.lossless.Decoder.prototype.select1=function(compOffset){return this.getPreviousX(compOffset)};jpeg.lossless.Decoder.prototype.select2=function(compOffset){return this.getPreviousY(compOffset)};jpeg.lossless.Decoder.prototype.select3=function(compOffset){return this.getPreviousXY(compOffset)};jpeg.lossless.Decoder.prototype.select4=function(compOffset){return this.getPreviousX(compOffset)+this.getPreviousY(compOffset)-this.getPreviousXY(compOffset)};jpeg.lossless.Decoder.prototype.select5=function(compOffset){return this.getPreviousX(compOffset)+(this.getPreviousY(compOffset)-this.getPreviousXY(compOffset)>>1)};jpeg.lossless.Decoder.prototype.select6=function(compOffset){return this.getPreviousY(compOffset)+(this.getPreviousX(compOffset)-this.getPreviousXY(compOffset)>>1)};jpeg.lossless.Decoder.prototype.select7=function(compOffset){return(this.getPreviousX(compOffset)+this.getPreviousY(compOffset))/2};jpeg.lossless.Decoder.prototype.decodeRGB=function(prev,temp,index){var value,actab,dctab,qtab,ctrC,i,k,j;prev[0]=this.selector(0);prev[1]=this.selector(1);prev[2]=this.selector(2);for(ctrC=0;ctrC<this.numComp;ctrC+=1){qtab=this.qTab[ctrC];actab=this.acTab[ctrC];dctab=this.dcTab[ctrC];for(i=0;i<this.nBlock[ctrC];i+=1){for(k=0;k<this.IDCT_Source.length;k+=1){this.IDCT_Source[k]=0}value=this.getHuffmanValue(dctab,temp,index);if(value>=65280){return value}prev[ctrC]=this.IDCT_Source[0]=prev[ctrC]+this.getn(index,value,temp,index);this.IDCT_Source[0]*=qtab[0];for(j=1;j<64;j+=1){value=this.getHuffmanValue(actab,temp,index);if(value>=65280){return value}j+=value>>4;if((value&15)===0){if(value>>4===0){break}}else{this.IDCT_Source[jpeg.lossless.Decoder.IDCT_P[j]]=this.getn(index,value&15,temp,index)*qtab[j]}}}}return 0};jpeg.lossless.Decoder.prototype.decodeSingle=function(prev,temp,index){var value,i,n,nRestart;if(this.restarting){this.restarting=false;prev[0]=1<<this.frame.precision-1}else{prev[0]=this.selector()}for(i=0;i<this.nBlock[0];i+=1){value=this.getHuffmanValue(this.dcTab[0],temp,index);if(value>=65280){return value}n=this.getn(prev,value,temp,index);nRestart=n>>8;if(nRestart>=jpeg.lossless.Decoder.RESTART_MARKER_BEGIN&&nRestart<=jpeg.lossless.Decoder.RESTART_MARKER_END){return nRestart}prev[0]+=n}return 0};jpeg.lossless.Decoder.prototype.getHuffmanValue=function(table,temp,index){var code,input,mask;mask=65535;if(index[0]<8){temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input}else{index[0]-=8}code=table[temp[0]>>index[0]];if((code&jpeg.lossless.Decoder.MSB)!==0){if(this.markerIndex!==0){this.markerIndex=0;return 65280|this.marker}temp[0]&=mask>>16-index[0];temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input;code=table[(code&255)*256+(temp[0]>>index[0])];index[0]+=8}index[0]+=8-(code>>8);if(index[0]<0){throw new Error("index="+index[0]+" temp="+temp[0]+" code="+code+" in HuffmanValue()")}if(index[0]<this.markerIndex){this.markerIndex=0;return 65280|this.marker}temp[0]&=mask>>16-index[0];return code&255};jpeg.lossless.Decoder.prototype.getn=function(PRED,n,temp,index){var result,one,n_one,mask,input;one=1;n_one=-1;mask=65535;if(n===0){return 0}if(n===16){if(PRED[0]>=0){return-32768}else{return 32768}}index[0]-=n;if(index[0]>=0){if(index[0]<this.markerIndex&&!this.isLastPixel()){this.markerIndex=0;return(65280|this.marker)<<8}result=temp[0]>>index[0];temp[0]&=mask>>16-index[0]}else{temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input;index[0]+=8;if(index[0]<0){if(this.markerIndex!==0){this.markerIndex=0;return(65280|this.marker)<<8}temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input;index[0]+=8}if(index[0]<0){throw new Error("index="+index[0]+" in getn()")}if(index[0]<this.markerIndex){this.markerIndex=0;return(65280|this.marker)<<8}result=temp[0]>>index[0];temp[0]&=mask>>16-index[0]}if(result<one<<n-1){result+=(n_one<<n)+1}return result};jpeg.lossless.Decoder.prototype.getPreviousX=function(compOffset){if(this.xLoc>0){return this.getter(this.yLoc*this.xDim+this.xLoc-1,compOffset)}else if(this.yLoc>0){return this.getPreviousY(compOffset)}else{return 1<<this.frame.precision-1}};jpeg.lossless.Decoder.prototype.getPreviousXY=function(compOffset){if(this.xLoc>0&&this.yLoc>0){return this.getter((this.yLoc-1)*this.xDim+this.xLoc-1,compOffset)}else{return this.getPreviousY(compOffset)}};jpeg.lossless.Decoder.prototype.getPreviousY=function(compOffset){if(this.yLoc>0){return this.getter((this.yLoc-1)*this.xDim+this.xLoc,compOffset)}else{return this.getPreviousX(compOffset)}};jpeg.lossless.Decoder.prototype.isLastPixel=function(){return this.xLoc===this.xDim-1&&this.yLoc===this.yDim-1};jpeg.lossless.Decoder.prototype.outputSingle=function(PRED){if(this.xLoc<this.xDim&&this.yLoc<this.yDim){this.setter(this.yLoc*this.xDim+this.xLoc,this.mask&PRED[0]);this.xLoc+=1;if(this.xLoc>=this.xDim){this.yLoc+=1;this.xLoc=0}}};jpeg.lossless.Decoder.prototype.outputRGB=function(PRED){var offset=this.yLoc*this.xDim+this.xLoc;if(this.xLoc<this.xDim&&this.yLoc<this.yDim){this.setter(offset,PRED[0],0);this.setter(offset,PRED[1],1);this.setter(offset,PRED[2],2);this.xLoc+=1;if(this.xLoc>=this.xDim){this.yLoc+=1;this.xLoc=0}}};jpeg.lossless.Decoder.prototype.setValue16=function(index,val){this.outputData.setInt16(index*2,val,true)};jpeg.lossless.Decoder.prototype.getValue16=function(index){return this.outputData.getInt16(index*2,true)};jpeg.lossless.Decoder.prototype.setValue8=function(index,val){this.outputData.setInt8(index,val)};jpeg.lossless.Decoder.prototype.getValue8=function(index){return this.outputData.getInt8(index)};jpeg.lossless.Decoder.prototype.setValueRGB=function(index,val,compOffset){this.outputData.setUint8(index*3+compOffset,val)};jpeg.lossless.Decoder.prototype.getValueRGB=function(index,compOffset){return this.outputData.getUint8(index*3+compOffset)};jpeg.lossless.Decoder.prototype.readApp=function(){var count=0,length=this.stream.get16();count+=2;while(count<length){this.stream.get8();count+=1}return length};jpeg.lossless.Decoder.prototype.readComment=function(){var sb="",count=0,length;length=this.stream.get16();count+=2;while(count<length){sb+=this.stream.get8();count+=1}return sb};jpeg.lossless.Decoder.prototype.readNumber=function(){var Ld=this.stream.get16();if(Ld!==4){throw new Error("ERROR: Define number format throw new IOException [Ld!=4]")}return this.stream.get16()};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.Decoder}},{"./data-stream.js":2,"./frame-header.js":4,"./huffman-table.js":5,"./quantization-table.js":7,"./scan-header.js":9,"./utils.js":10}],4:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ComponentSpec=jpeg.lossless.ComponentSpec||(typeof require!=="undefined"?require("./component-spec.js"):null);jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.FrameHeader=jpeg.lossless.FrameHeader||function(){this.components=[];this.dimX=0;this.dimY=0;this.numComp=0;this.precision=0};jpeg.lossless.FrameHeader.prototype.read=function(data){var count=0,length,i,c,temp;length=data.get16();count+=2;this.precision=data.get8();count+=1;this.dimY=data.get16();count+=2;this.dimX=data.get16();count+=2;this.numComp=data.get8();count+=1;for(i=1;i<=this.numComp;i+=1){if(count>length){throw new Error("ERROR: frame format error")}c=data.get8();count+=1;if(count>=length){throw new Error("ERROR: frame format error [c>=Lf]")}temp=data.get8();count+=1;if(!this.components[c]){this.components[c]=new jpeg.lossless.ComponentSpec}this.components[c].hSamp=temp>>4;this.components[c].vSamp=temp&15;this.components[c].quantTableSel=data.get8();count+=1}if(count!==length){throw new Error("ERROR: frame format error [Lf!=count]")}return 1};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.FrameHeader}},{"./component-spec.js":1,"./data-stream.js":2}],5:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);jpeg.lossless.HuffmanTable=jpeg.lossless.HuffmanTable||function(){this.l=jpeg.lossless.Utils.createArray(4,2,16);this.th=[];this.v=jpeg.lossless.Utils.createArray(4,2,16,200);this.tc=jpeg.lossless.Utils.createArray(4,2);this.tc[0][0]=0;this.tc[1][0]=0;this.tc[2][0]=0;this.tc[3][0]=0;this.tc[0][1]=0;this.tc[1][1]=0;this.tc[2][1]=0;this.tc[3][1]=0;this.th[0]=0;this.th[1]=0;this.th[2]=0;this.th[3]=0};jpeg.lossless.HuffmanTable.MSB=2147483648;jpeg.lossless.HuffmanTable.prototype.read=function(data,HuffTab){var count=0,length,temp,t,c,i,j;length=data.get16();count+=2;while(count<length){temp=data.get8();count+=1;t=temp&15;if(t>3){throw new Error("ERROR: Huffman table ID > 3")}c=temp>>4;if(c>2){throw new Error("ERROR: Huffman table [Table class > 2 ]")}this.th[t]=1;this.tc[t][c]=1;for(i=0;i<16;i+=1){this.l[t][c][i]=data.get8();count+=1}for(i=0;i<16;i+=1){for(j=0;j<this.l[t][c][i];j+=1){if(count>length){throw new Error("ERROR: Huffman table format error [count>Lh]")}this.v[t][c][i][j]=data.get8();count+=1}}}if(count!==length){throw new Error("ERROR: Huffman table format error [count!=Lf]")}for(i=0;i<4;i+=1){for(j=0;j<2;j+=1){if(this.tc[i][j]!==0){this.buildHuffTable(HuffTab[i][j],this.l[i][j],this.v[i][j])}}}return 1};jpeg.lossless.HuffmanTable.prototype.buildHuffTable=function(tab,L,V){var currentTable,temp,k,i,j,n;temp=256;k=0;for(i=0;i<8;i+=1){for(j=0;j<L[i];j+=1){for(n=0;n<temp>>i+1;n+=1){tab[k]=V[i][j]|i+1<<8;k+=1}}}for(i=1;k<256;i+=1,k+=1){tab[k]=i|jpeg.lossless.HuffmanTable.MSB}currentTable=1;k=0;for(i=8;i<16;i+=1){for(j=0;j<L[i];j+=1){for(n=0;n<temp>>i-7;n+=1){tab[currentTable*256+k]=V[i][j]|i+1<<8;k+=1}if(k>=256){if(k>256){throw new Error("ERROR: Huffman table error(1)!")}k=0;currentTable+=1}}}};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.HuffmanTable}},{"./data-stream.js":2,"./utils.js":10}],6:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ComponentSpec=jpeg.lossless.ComponentSpec||(typeof require!=="undefined"?require("./component-spec.js"):null);jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.Decoder=jpeg.lossless.Decoder||(typeof require!=="undefined"?require("./decoder.js"):null);jpeg.lossless.FrameHeader=jpeg.lossless.FrameHeader||(typeof require!=="undefined"?require("./frame-header.js"):null);jpeg.lossless.HuffmanTable=jpeg.lossless.HuffmanTable||(typeof require!=="undefined"?require("./huffman-table.js"):null);jpeg.lossless.QuantizationTable=jpeg.lossless.QuantizationTable||(typeof require!=="undefined"?require("./quantization-table.js"):null);jpeg.lossless.ScanComponent=jpeg.lossless.ScanComponent||(typeof require!=="undefined"?require("./scan-component.js"):null);jpeg.lossless.ScanHeader=jpeg.lossless.ScanHeader||(typeof require!=="undefined"?require("./scan-header.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg}},{"./component-spec.js":1,"./data-stream.js":2,"./decoder.js":3,"./frame-header.js":4,"./huffman-table.js":5,"./quantization-table.js":7,"./scan-component.js":8,"./scan-header.js":9,"./utils.js":10}],7:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);jpeg.lossless.QuantizationTable=jpeg.lossless.QuantizationTable||function(){this.precision=[];this.tq=[];this.quantTables=jpeg.lossless.Utils.createArray(4,64);this.tq[0]=0;this.tq[1]=0;this.tq[2]=0;this.tq[3]=0};jpeg.lossless.QuantizationTable.enhanceQuantizationTable=function(qtab,table){var i;for(i=0;i<8;i+=1){qtab[table[0*8+i]]*=90;qtab[table[4*8+i]]*=90;qtab[table[2*8+i]]*=118;qtab[table[6*8+i]]*=49;qtab[table[5*8+i]]*=71;qtab[table[1*8+i]]*=126;qtab[table[7*8+i]]*=25;qtab[table[3*8+i]]*=106}for(i=0;i<8;i+=1){qtab[table[0+8*i]]*=90;qtab[table[4+8*i]]*=90;qtab[table[2+8*i]]*=118;qtab[table[6+8*i]]*=49;qtab[table[5+8*i]]*=71;qtab[table[1+8*i]]*=126;qtab[table[7+8*i]]*=25;qtab[table[3+8*i]]*=106}for(i=0;i<64;i+=1){qtab[i]>>=6}};jpeg.lossless.QuantizationTable.prototype.read=function(data,table){var count=0,length,temp,t,i;length=data.get16();count+=2;while(count<length){temp=data.get8();count+=1;t=temp&15;if(t>3){throw new Error("ERROR: Quantization table ID > 3")}this.precision[t]=temp>>4;if(this.precision[t]===0){this.precision[t]=8}else if(this.precision[t]===1){this.precision[t]=16}else{throw new Error("ERROR: Quantization table precision error")}this.tq[t]=1;if(this.precision[t]===8){for(i=0;i<64;i+=1){if(count>length){throw new Error("ERROR: Quantization table format error")}this.quantTables[t][i]=data.get8();count+=1}jpeg.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[t],table)}else{for(i=0;i<64;i+=1){if(count>length){throw new Error("ERROR: Quantization table format error")}this.quantTables[t][i]=data.get16();count+=2}jpeg.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[t],table)}}if(count!==length){throw new Error("ERROR: Quantization table error [count!=Lq]")}return 1};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.QuantizationTable}},{"./data-stream.js":2,"./utils.js":10}],8:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ScanComponent=jpeg.lossless.ScanComponent||function(){this.acTabSel=0;this.dcTabSel=0;this.scanCompSel=0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.ScanComponent}},{}],9:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.ScanComponent=jpeg.lossless.ScanComponent||(typeof require!=="undefined"?require("./scan-component.js"):null);jpeg.lossless.ScanHeader=jpeg.lossless.ScanHeader||function(){this.ah=0;this.al=0;this.numComp=0;this.selection=0;this.spectralEnd=0;this.components=[]};jpeg.lossless.ScanHeader.prototype.read=function(data){var count=0,length,i,temp;length=data.get16();count+=2;this.numComp=data.get8();count+=1;for(i=0;i<this.numComp;i+=1){this.components[i]=new jpeg.lossless.ScanComponent;if(count>length){throw new Error("ERROR: scan header format error")}this.components[i].scanCompSel=data.get8();count+=1;temp=data.get8();count+=1;this.components[i].dcTabSel=temp>>4;this.components[i].acTabSel=temp&15}this.selection=data.get8();count+=1;this.spectralEnd=data.get8();count+=1;temp=data.get8();this.ah=temp>>4;this.al=temp&15;count+=1;if(count!==length){throw new Error("ERROR: scan header format error [count!=Ns]")}return 1};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.ScanHeader}},{"./data-stream.js":2,"./scan-component.js":8}],10:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.Utils=jpeg.lossless.Utils||{};jpeg.lossless.Utils.createArray=function(length){var arr=new Array(length||0),i=length;if(arguments.length>1){var args=Array.prototype.slice.call(arguments,1);while(i--)arr[length-1-i]=jpeg.lossless.Utils.createArray.apply(this,args)}return arr};jpeg.lossless.Utils.makeCRCTable=function(){var c;var crcTable=[];for(var n=0;n<256;n++){c=n;for(var k=0;k<8;k++){c=c&1?3988292384^c>>>1:c>>>1}crcTable[n]=c}return crcTable};jpeg.lossless.Utils.crc32=function(dataView){var crcTable=jpeg.lossless.Utils.crcTable||(jpeg.lossless.Utils.crcTable=jpeg.lossless.Utils.makeCRCTable());var crc=0^-1;for(var i=0;i<dataView.byteLength;i++){crc=crc>>>8^crcTable[(crc^dataView.getUint8(i))&255]}return(crc^-1)>>>0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.Utils}},{}]},{},[6])(6)});
+(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.jpeg=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){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ComponentSpec=jpeg.lossless.ComponentSpec||function(){this.hSamp=0;this.quantTableSel=0;this.vSamp=0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.ComponentSpec}},{}],2:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||function(data,offset,length){this.buffer=new DataView(data,offset,length);this.index=0};jpeg.lossless.DataStream.prototype.get16=function(){var value=this.buffer.getUint16(this.index,false);this.index+=2;return value};jpeg.lossless.DataStream.prototype.get8=function(){var value=this.buffer.getUint8(this.index);this.index+=1;return value};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.DataStream}},{}],3:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.HuffmanTable=jpeg.lossless.HuffmanTable||(typeof require!=="undefined"?require("./huffman-table.js"):null);jpeg.lossless.QuantizationTable=jpeg.lossless.QuantizationTable||(typeof require!=="undefined"?require("./quantization-table.js"):null);jpeg.lossless.ScanHeader=jpeg.lossless.ScanHeader||(typeof require!=="undefined"?require("./scan-header.js"):null);jpeg.lossless.FrameHeader=jpeg.lossless.FrameHeader||(typeof require!=="undefined"?require("./frame-header.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);jpeg.lossless.Decoder=jpeg.lossless.Decoder||function(buffer,numBytes){this.buffer=buffer;this.frame=new jpeg.lossless.FrameHeader;this.huffTable=new jpeg.lossless.HuffmanTable;this.quantTable=new jpeg.lossless.QuantizationTable;this.scan=new jpeg.lossless.ScanHeader;this.DU=jpeg.lossless.Utils.createArray(10,4,64);this.HuffTab=jpeg.lossless.Utils.createArray(4,2,50*256);this.IDCT_Source=[];this.nBlock=[];this.acTab=jpeg.lossless.Utils.createArray(10,1);this.dcTab=jpeg.lossless.Utils.createArray(10,1);this.qTab=jpeg.lossless.Utils.createArray(10,1);this.marker=0;this.markerIndex=0;this.numComp=0;this.restartInterval=0;this.selection=0;this.xDim=0;this.yDim=0;this.xLoc=0;this.yLoc=0;this.numBytes=0;this.outputData=null;this.restarting=false;this.mask=0;if(typeof numBytes!=="undefined"){this.numBytes=numBytes}};jpeg.lossless.Decoder.IDCT_P=[0,5,40,16,45,2,7,42,21,56,8,61,18,47,1,4,41,23,58,13,32,24,37,10,63,17,44,3,6,43,20,57,15,34,29,48,53,26,39,9,60,19,46,22,59,12,33,31,50,55,25,36,11,62,14,35,28,49,52,27,38,30,51,54];jpeg.lossless.Decoder.TABLE=[0,1,5,6,14,15,27,28,2,4,7,13,16,26,29,42,3,8,12,17,25,30,41,43,9,11,18,24,31,40,44,53,10,19,23,32,39,45,52,54,20,22,33,38,46,51,55,60,21,34,37,47,50,56,59,61,35,36,48,49,57,58,62,63];jpeg.lossless.Decoder.MAX_HUFFMAN_SUBTREE=50;jpeg.lossless.Decoder.MSB=2147483648;jpeg.lossless.Decoder.RESTART_MARKER_BEGIN=65488;jpeg.lossless.Decoder.RESTART_MARKER_END=65495;jpeg.lossless.Decoder.prototype.decompress=function(buffer,offset,length){return this.decode(buffer,offset,length).buffer};jpeg.lossless.Decoder.prototype.decode=function(buffer,offset,length,numBytes){var current,scanNum=0,pred=[],i,compN,temp=[],index=[],mcuNum;if(typeof buffer!=="undefined"){this.buffer=buffer}if(typeof numBytes!=="undefined"){this.numBytes=numBytes}this.stream=new jpeg.lossless.DataStream(this.buffer,offset,length);this.buffer=null;this.xLoc=0;this.yLoc=0;current=this.stream.get16();if(current!==65496){throw new Error("Not a JPEG file")}current=this.stream.get16();while(current>>4!==4092||current===65476){switch(current){case 65476:this.huffTable.read(this.stream,this.HuffTab);break;case 65484:throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");case 65499:this.quantTable.read(this.stream,jpeg.lossless.Decoder.TABLE);break;case 65501:this.restartInterval=this.readNumber();break;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:this.readApp();break;case 65534:this.readComment();break;default:if(current>>8!==255){throw new Error("ERROR: format throw new IOException! (decode)")}}current=this.stream.get16()}if(current<65472||current>65479){throw new Error("ERROR: could not handle arithmetic code!")}this.frame.read(this.stream);current=this.stream.get16();do{while(current!==65498){switch(current){case 65476:this.huffTable.read(this.stream,this.HuffTab);break;case 65484:throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");case 65499:this.quantTable.read(this.stream,jpeg.lossless.Decoder.TABLE);break;case 65501:this.restartInterval=this.readNumber();break;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:this.readApp();break;case 65534:this.readComment();break;default:if(current>>8!==255){throw new Error("ERROR: format throw new IOException! (Parser.decode)")}}current=this.stream.get16()}this.precision=this.frame.precision;this.components=this.frame.components;if(!this.numBytes){this.numBytes=parseInt(Math.ceil(this.precision/8))}if(this.numBytes==1){this.mask=255}else{this.mask=65535}this.scan.read(this.stream);this.numComp=this.scan.numComp;this.selection=this.scan.selection;if(this.numBytes===1){if(this.numComp===3){this.getter=this.getValueRGB;this.setter=this.setValueRGB;this.output=this.outputRGB}else{this.getter=this.getValue8;this.setter=this.setValue8;this.output=this.outputSingle}}else{this.getter=this.getValue16;this.setter=this.setValue16;this.output=this.outputSingle}switch(this.selection){case 2:this.selector=this.select2;break;case 3:this.selector=this.select3;break;case 4:this.selector=this.select4;break;case 5:this.selector=this.select5;break;case 6:this.selector=this.select6;break;case 7:this.selector=this.select7;break;default:this.selector=this.select1;break}this.scanComps=this.scan.components;this.quantTables=this.quantTable.quantTables;for(i=0;i<this.numComp;i+=1){compN=this.scanComps[i].scanCompSel;this.qTab[i]=this.quantTables[this.components[compN].quantTableSel];this.nBlock[i]=this.components[compN].vSamp*this.components[compN].hSamp;this.dcTab[i]=this.HuffTab[this.scanComps[i].dcTabSel][0];this.acTab[i]=this.HuffTab[this.scanComps[i].acTabSel][1]}this.xDim=this.frame.dimX;this.yDim=this.frame.dimY;this.outputData=new DataView(new ArrayBuffer(this.xDim*this.yDim*this.numBytes*this.numComp));scanNum+=1;while(true){temp[0]=0;index[0]=0;for(i=0;i<10;i+=1){pred[i]=1<<this.precision-1}if(this.restartInterval===0){current=this.decodeUnit(pred,temp,index);while(current===0&&(this.xLoc<this.xDim&&this.yLoc<this.yDim)){this.output(pred);current=this.decodeUnit(pred,temp,index)}break}for(mcuNum=0;mcuNum<this.restartInterval;mcuNum+=1){this.restarting=mcuNum==0;current=this.decodeUnit(pred,temp,index);this.output(pred);if(current!==0){break}}if(current===0){if(this.markerIndex!==0){current=65280|this.marker;this.markerIndex=0}else{current=this.stream.get16()}}if(!(current>=jpeg.lossless.Decoder.RESTART_MARKER_BEGIN&&current<=jpeg.lossless.Decoder.RESTART_MARKER_END)){break}}if(current===65500&&scanNum===1){this.readNumber();current=this.stream.get16()}}while(current!==65497&&(this.xLoc<this.xDim&&this.yLoc<this.yDim)&&scanNum===0);return this.outputData};jpeg.lossless.Decoder.prototype.decodeUnit=function(prev,temp,index){if(this.numComp==1){return this.decodeSingle(prev,temp,index)}else if(this.numComp==3){return this.decodeRGB(prev,temp,index)}else{return-1}};jpeg.lossless.Decoder.prototype.select1=function(compOffset){return this.getPreviousX(compOffset)};jpeg.lossless.Decoder.prototype.select2=function(compOffset){return this.getPreviousY(compOffset)};jpeg.lossless.Decoder.prototype.select3=function(compOffset){return this.getPreviousXY(compOffset)};jpeg.lossless.Decoder.prototype.select4=function(compOffset){return this.getPreviousX(compOffset)+this.getPreviousY(compOffset)-this.getPreviousXY(compOffset)};jpeg.lossless.Decoder.prototype.select5=function(compOffset){return this.getPreviousX(compOffset)+(this.getPreviousY(compOffset)-this.getPreviousXY(compOffset)>>1)};jpeg.lossless.Decoder.prototype.select6=function(compOffset){return this.getPreviousY(compOffset)+(this.getPreviousX(compOffset)-this.getPreviousXY(compOffset)>>1)};jpeg.lossless.Decoder.prototype.select7=function(compOffset){return(this.getPreviousX(compOffset)+this.getPreviousY(compOffset))/2};jpeg.lossless.Decoder.prototype.decodeRGB=function(prev,temp,index){var value,actab,dctab,qtab,ctrC,i,k,j;prev[0]=this.selector(0);prev[1]=this.selector(1);prev[2]=this.selector(2);for(ctrC=0;ctrC<this.numComp;ctrC+=1){qtab=this.qTab[ctrC];actab=this.acTab[ctrC];dctab=this.dcTab[ctrC];for(i=0;i<this.nBlock[ctrC];i+=1){for(k=0;k<this.IDCT_Source.length;k+=1){this.IDCT_Source[k]=0}value=this.getHuffmanValue(dctab,temp,index);if(value>=65280){return value}prev[ctrC]=this.IDCT_Source[0]=prev[ctrC]+this.getn(index,value,temp,index);this.IDCT_Source[0]*=qtab[0];for(j=1;j<64;j+=1){value=this.getHuffmanValue(actab,temp,index);if(value>=65280){return value}j+=value>>4;if((value&15)===0){if(value>>4===0){break}}else{this.IDCT_Source[jpeg.lossless.Decoder.IDCT_P[j]]=this.getn(index,value&15,temp,index)*qtab[j]}}}}return 0};jpeg.lossless.Decoder.prototype.decodeSingle=function(prev,temp,index){var value,i,n,nRestart;if(this.restarting){this.restarting=false;prev[0]=1<<this.frame.precision-1}else{prev[0]=this.selector()}for(i=0;i<this.nBlock[0];i+=1){value=this.getHuffmanValue(this.dcTab[0],temp,index);if(value>=65280){return value}n=this.getn(prev,value,temp,index);nRestart=n>>8;if(nRestart>=jpeg.lossless.Decoder.RESTART_MARKER_BEGIN&&nRestart<=jpeg.lossless.Decoder.RESTART_MARKER_END){return nRestart}prev[0]+=n}return 0};jpeg.lossless.Decoder.prototype.getHuffmanValue=function(table,temp,index){var code,input,mask;mask=65535;if(index[0]<8){temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input}else{index[0]-=8}code=table[temp[0]>>index[0]];if((code&jpeg.lossless.Decoder.MSB)!==0){if(this.markerIndex!==0){this.markerIndex=0;return 65280|this.marker}temp[0]&=mask>>16-index[0];temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input;code=table[(code&255)*256+(temp[0]>>index[0])];index[0]+=8}index[0]+=8-(code>>8);if(index[0]<0){throw new Error("index="+index[0]+" temp="+temp[0]+" code="+code+" in HuffmanValue()")}if(index[0]<this.markerIndex){this.markerIndex=0;return 65280|this.marker}temp[0]&=mask>>16-index[0];return code&255};jpeg.lossless.Decoder.prototype.getn=function(PRED,n,temp,index){var result,one,n_one,mask,input;one=1;n_one=-1;mask=65535;if(n===0){return 0}if(n===16){if(PRED[0]>=0){return-32768}else{return 32768}}index[0]-=n;if(index[0]>=0){if(index[0]<this.markerIndex&&!this.isLastPixel()){this.markerIndex=0;return(65280|this.marker)<<8}result=temp[0]>>index[0];temp[0]&=mask>>16-index[0]}else{temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input;index[0]+=8;if(index[0]<0){if(this.markerIndex!==0){this.markerIndex=0;return(65280|this.marker)<<8}temp[0]<<=8;input=this.stream.get8();if(input===255){this.marker=this.stream.get8();if(this.marker!==0){this.markerIndex=9}}temp[0]|=input;index[0]+=8}if(index[0]<0){throw new Error("index="+index[0]+" in getn()")}if(index[0]<this.markerIndex){this.markerIndex=0;return(65280|this.marker)<<8}result=temp[0]>>index[0];temp[0]&=mask>>16-index[0]}if(result<one<<n-1){result+=(n_one<<n)+1}return result};jpeg.lossless.Decoder.prototype.getPreviousX=function(compOffset){if(this.xLoc>0){return this.getter(this.yLoc*this.xDim+this.xLoc-1,compOffset)}else if(this.yLoc>0){return this.getPreviousY(compOffset)}else{return 1<<this.frame.precision-1}};jpeg.lossless.Decoder.prototype.getPreviousXY=function(compOffset){if(this.xLoc>0&&this.yLoc>0){return this.getter((this.yLoc-1)*this.xDim+this.xLoc-1,compOffset)}else{return this.getPreviousY(compOffset)}};jpeg.lossless.Decoder.prototype.getPreviousY=function(compOffset){if(this.yLoc>0){return this.getter((this.yLoc-1)*this.xDim+this.xLoc,compOffset)}else{return this.getPreviousX(compOffset)}};jpeg.lossless.Decoder.prototype.isLastPixel=function(){return this.xLoc===this.xDim-1&&this.yLoc===this.yDim-1};jpeg.lossless.Decoder.prototype.outputSingle=function(PRED){if(this.xLoc<this.xDim&&this.yLoc<this.yDim){this.setter(this.yLoc*this.xDim+this.xLoc,this.mask&PRED[0]);this.xLoc+=1;if(this.xLoc>=this.xDim){this.yLoc+=1;this.xLoc=0}}};jpeg.lossless.Decoder.prototype.outputRGB=function(PRED){var offset=this.yLoc*this.xDim+this.xLoc;if(this.xLoc<this.xDim&&this.yLoc<this.yDim){this.setter(offset,PRED[0],0);this.setter(offset,PRED[1],1);this.setter(offset,PRED[2],2);this.xLoc+=1;if(this.xLoc>=this.xDim){this.yLoc+=1;this.xLoc=0}}};jpeg.lossless.Decoder.prototype.setValue16=function(index,val){this.outputData.setInt16(index*2,val,true)};jpeg.lossless.Decoder.prototype.getValue16=function(index){return this.outputData.getInt16(index*2,true)&this.mask};jpeg.lossless.Decoder.prototype.setValue8=function(index,val){this.outputData.setInt8(index,val)};jpeg.lossless.Decoder.prototype.getValue8=function(index){return this.outputData.getInt8(index)&this.mask};jpeg.lossless.Decoder.prototype.setValueRGB=function(index,val,compOffset){this.outputData.setUint8(index*3+compOffset,val)};jpeg.lossless.Decoder.prototype.getValueRGB=function(index,compOffset){return this.outputData.getUint8(index*3+compOffset)};jpeg.lossless.Decoder.prototype.readApp=function(){var count=0,length=this.stream.get16();count+=2;while(count<length){this.stream.get8();count+=1}return length};jpeg.lossless.Decoder.prototype.readComment=function(){var sb="",count=0,length;length=this.stream.get16();count+=2;while(count<length){sb+=this.stream.get8();count+=1}return sb};jpeg.lossless.Decoder.prototype.readNumber=function(){var Ld=this.stream.get16();if(Ld!==4){throw new Error("ERROR: Define number format throw new IOException [Ld!=4]")}return this.stream.get16()};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.Decoder}},{"./data-stream.js":2,"./frame-header.js":4,"./huffman-table.js":5,"./quantization-table.js":7,"./scan-header.js":9,"./utils.js":10}],4:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ComponentSpec=jpeg.lossless.ComponentSpec||(typeof require!=="undefined"?require("./component-spec.js"):null);jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.FrameHeader=jpeg.lossless.FrameHeader||function(){this.components=[];this.dimX=0;this.dimY=0;this.numComp=0;this.precision=0};jpeg.lossless.FrameHeader.prototype.read=function(data){var count=0,length,i,c,temp;length=data.get16();count+=2;this.precision=data.get8();count+=1;this.dimY=data.get16();count+=2;this.dimX=data.get16();count+=2;this.numComp=data.get8();count+=1;for(i=1;i<=this.numComp;i+=1){if(count>length){throw new Error("ERROR: frame format error")}c=data.get8();count+=1;if(count>=length){throw new Error("ERROR: frame format error [c>=Lf]")}temp=data.get8();count+=1;if(!this.components[c]){this.components[c]=new jpeg.lossless.ComponentSpec}this.components[c].hSamp=temp>>4;this.components[c].vSamp=temp&15;this.components[c].quantTableSel=data.get8();count+=1}if(count!==length){throw new Error("ERROR: frame format error [Lf!=count]")}return 1};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.FrameHeader}},{"./component-spec.js":1,"./data-stream.js":2}],5:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);jpeg.lossless.HuffmanTable=jpeg.lossless.HuffmanTable||function(){this.l=jpeg.lossless.Utils.createArray(4,2,16);this.th=[];this.v=jpeg.lossless.Utils.createArray(4,2,16,200);this.tc=jpeg.lossless.Utils.createArray(4,2);this.tc[0][0]=0;this.tc[1][0]=0;this.tc[2][0]=0;this.tc[3][0]=0;this.tc[0][1]=0;this.tc[1][1]=0;this.tc[2][1]=0;this.tc[3][1]=0;this.th[0]=0;this.th[1]=0;this.th[2]=0;this.th[3]=0};jpeg.lossless.HuffmanTable.MSB=2147483648;jpeg.lossless.HuffmanTable.prototype.read=function(data,HuffTab){var count=0,length,temp,t,c,i,j;length=data.get16();count+=2;while(count<length){temp=data.get8();count+=1;t=temp&15;if(t>3){throw new Error("ERROR: Huffman table ID > 3")}c=temp>>4;if(c>2){throw new Error("ERROR: Huffman table [Table class > 2 ]")}this.th[t]=1;this.tc[t][c]=1;for(i=0;i<16;i+=1){this.l[t][c][i]=data.get8();count+=1}for(i=0;i<16;i+=1){for(j=0;j<this.l[t][c][i];j+=1){if(count>length){throw new Error("ERROR: Huffman table format error [count>Lh]")}this.v[t][c][i][j]=data.get8();count+=1}}}if(count!==length){throw new Error("ERROR: Huffman table format error [count!=Lf]")}for(i=0;i<4;i+=1){for(j=0;j<2;j+=1){if(this.tc[i][j]!==0){this.buildHuffTable(HuffTab[i][j],this.l[i][j],this.v[i][j])}}}return 1};jpeg.lossless.HuffmanTable.prototype.buildHuffTable=function(tab,L,V){var currentTable,temp,k,i,j,n;temp=256;k=0;for(i=0;i<8;i+=1){for(j=0;j<L[i];j+=1){for(n=0;n<temp>>i+1;n+=1){tab[k]=V[i][j]|i+1<<8;k+=1}}}for(i=1;k<256;i+=1,k+=1){tab[k]=i|jpeg.lossless.HuffmanTable.MSB}currentTable=1;k=0;for(i=8;i<16;i+=1){for(j=0;j<L[i];j+=1){for(n=0;n<temp>>i-7;n+=1){tab[currentTable*256+k]=V[i][j]|i+1<<8;k+=1}if(k>=256){if(k>256){throw new Error("ERROR: Huffman table error(1)!")}k=0;currentTable+=1}}}};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.HuffmanTable}},{"./data-stream.js":2,"./utils.js":10}],6:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ComponentSpec=jpeg.lossless.ComponentSpec||(typeof require!=="undefined"?require("./component-spec.js"):null);jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.Decoder=jpeg.lossless.Decoder||(typeof require!=="undefined"?require("./decoder.js"):null);jpeg.lossless.FrameHeader=jpeg.lossless.FrameHeader||(typeof require!=="undefined"?require("./frame-header.js"):null);jpeg.lossless.HuffmanTable=jpeg.lossless.HuffmanTable||(typeof require!=="undefined"?require("./huffman-table.js"):null);jpeg.lossless.QuantizationTable=jpeg.lossless.QuantizationTable||(typeof require!=="undefined"?require("./quantization-table.js"):null);jpeg.lossless.ScanComponent=jpeg.lossless.ScanComponent||(typeof require!=="undefined"?require("./scan-component.js"):null);jpeg.lossless.ScanHeader=jpeg.lossless.ScanHeader||(typeof require!=="undefined"?require("./scan-header.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg}},{"./component-spec.js":1,"./data-stream.js":2,"./decoder.js":3,"./frame-header.js":4,"./huffman-table.js":5,"./quantization-table.js":7,"./scan-component.js":8,"./scan-header.js":9,"./utils.js":10}],7:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.Utils=jpeg.lossless.Utils||(typeof require!=="undefined"?require("./utils.js"):null);jpeg.lossless.QuantizationTable=jpeg.lossless.QuantizationTable||function(){this.precision=[];this.tq=[];this.quantTables=jpeg.lossless.Utils.createArray(4,64);this.tq[0]=0;this.tq[1]=0;this.tq[2]=0;this.tq[3]=0};jpeg.lossless.QuantizationTable.enhanceQuantizationTable=function(qtab,table){var i;for(i=0;i<8;i+=1){qtab[table[0*8+i]]*=90;qtab[table[4*8+i]]*=90;qtab[table[2*8+i]]*=118;qtab[table[6*8+i]]*=49;qtab[table[5*8+i]]*=71;qtab[table[1*8+i]]*=126;qtab[table[7*8+i]]*=25;qtab[table[3*8+i]]*=106}for(i=0;i<8;i+=1){qtab[table[0+8*i]]*=90;qtab[table[4+8*i]]*=90;qtab[table[2+8*i]]*=118;qtab[table[6+8*i]]*=49;qtab[table[5+8*i]]*=71;qtab[table[1+8*i]]*=126;qtab[table[7+8*i]]*=25;qtab[table[3+8*i]]*=106}for(i=0;i<64;i+=1){qtab[i]>>=6}};jpeg.lossless.QuantizationTable.prototype.read=function(data,table){var count=0,length,temp,t,i;length=data.get16();count+=2;while(count<length){temp=data.get8();count+=1;t=temp&15;if(t>3){throw new Error("ERROR: Quantization table ID > 3")}this.precision[t]=temp>>4;if(this.precision[t]===0){this.precision[t]=8}else if(this.precision[t]===1){this.precision[t]=16}else{throw new Error("ERROR: Quantization table precision error")}this.tq[t]=1;if(this.precision[t]===8){for(i=0;i<64;i+=1){if(count>length){throw new Error("ERROR: Quantization table format error")}this.quantTables[t][i]=data.get8();count+=1}jpeg.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[t],table)}else{for(i=0;i<64;i+=1){if(count>length){throw new Error("ERROR: Quantization table format error")}this.quantTables[t][i]=data.get16();count+=2}jpeg.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[t],table)}}if(count!==length){throw new Error("ERROR: Quantization table error [count!=Lq]")}return 1};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.QuantizationTable}},{"./data-stream.js":2,"./utils.js":10}],8:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.ScanComponent=jpeg.lossless.ScanComponent||function(){this.acTabSel=0;this.dcTabSel=0;this.scanCompSel=0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.ScanComponent}},{}],9:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.DataStream=jpeg.lossless.DataStream||(typeof require!=="undefined"?require("./data-stream.js"):null);jpeg.lossless.ScanComponent=jpeg.lossless.ScanComponent||(typeof require!=="undefined"?require("./scan-component.js"):null);jpeg.lossless.ScanHeader=jpeg.lossless.ScanHeader||function(){this.ah=0;this.al=0;this.numComp=0;this.selection=0;this.spectralEnd=0;this.components=[]};jpeg.lossless.ScanHeader.prototype.read=function(data){var count=0,length,i,temp;length=data.get16();count+=2;this.numComp=data.get8();count+=1;for(i=0;i<this.numComp;i+=1){this.components[i]=new jpeg.lossless.ScanComponent;if(count>length){throw new Error("ERROR: scan header format error")}this.components[i].scanCompSel=data.get8();count+=1;temp=data.get8();count+=1;this.components[i].dcTabSel=temp>>4;this.components[i].acTabSel=temp&15}this.selection=data.get8();count+=1;this.spectralEnd=data.get8();count+=1;temp=data.get8();this.ah=temp>>4;this.al=temp&15;count+=1;if(count!==length){throw new Error("ERROR: scan header format error [count!=Ns]")}return 1};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.ScanHeader}},{"./data-stream.js":2,"./scan-component.js":8}],10:[function(require,module,exports){"use strict";var jpeg=jpeg||{};jpeg.lossless=jpeg.lossless||{};jpeg.lossless.Utils=jpeg.lossless.Utils||{};jpeg.lossless.Utils.createArray=function(length){var arr=new Array(length||0),i=length;if(arguments.length>1){var args=Array.prototype.slice.call(arguments,1);while(i--)arr[length-1-i]=jpeg.lossless.Utils.createArray.apply(this,args)}return arr};jpeg.lossless.Utils.makeCRCTable=function(){var c;var crcTable=[];for(var n=0;n<256;n++){c=n;for(var k=0;k<8;k++){c=c&1?3988292384^c>>>1:c>>>1}crcTable[n]=c}return crcTable};jpeg.lossless.Utils.crc32=function(dataView){var crcTable=jpeg.lossless.Utils.crcTable||(jpeg.lossless.Utils.crcTable=jpeg.lossless.Utils.makeCRCTable());var crc=0^-1;for(var i=0;i<dataView.byteLength;i++){crc=crc>>>8^crcTable[(crc^dataView.getUint8(i))&255]}return(crc^-1)>>>0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.Utils}},{}]},{},[6])(6)});

release/current/lossless.js

@@ -879,3 +879,3 @@ (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.jpeg = 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){
 jpeg.lossless.Decoder.prototype.getValue16 = function (index) {
-    return this.outputData.getInt16(index * 2, true);
+    return this.outputData.getInt16(index * 2, true) & this.mask;
 };
@@ -892,3 +892,3 @@
 jpeg.lossless.Decoder.prototype.getValue8 = function (index) {
-    return this.outputData.getInt8(index);
+    return this.outputData.getInt8(index) & this.mask;
 };
@@ -895,0 +895,0 @@

src/decoder.js

@@ -751,3 +751,3 @@ /*
 jpeg.lossless.Decoder.prototype.getValue16 = function (index) {
-    return this.outputData.getInt16(index * 2, true);
+    return this.outputData.getInt16(index * 2, true) & this.mask;
 };
@@ -764,3 +764,3 @@
 jpeg.lossless.Decoder.prototype.getValue8 = function (index) {
-    return this.outputData.getInt8(index);
+    return this.outputData.getInt8(index) & this.mask;
 };
@@ -767,0 +767,0 @@

No alert changes

Improved metrics

Total package byte prevSize

6094777

No dependency changes