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jpeg-lossless-decoder-js

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Comparing version 2.0.6 to 2.0.7

7

package.json
{
"name": "jpeg-lossless-decoder-js",
"version": "2.0.6",
"version": "2.0.7",
"description": "A JavaScript JPEG Lossless decoder.",

@@ -12,2 +12,4 @@ "main": "src/main.js",

"esbuild": "*",
"browserify": "*",
"uglify-js": "*",
"jsdoc-to-markdown": "*"

@@ -17,3 +19,4 @@ },

"test": "mocha tests",
"build": "rm -rf build; mkdir build; esbuild src/main.js --bundle --global-name=jpeg --outfile=build/lossless.js; esbuild src/main.js --bundle --global-name=jpeg --minify --outfile=build/lossless-min.js",
"esbuild": "rm -rf build; mkdir build; esbuild src/main.js --bundle --global-name=jpeg --outfile=build/lossless.js; esbuild src/main.js --bundle --global-name=jpeg --minify --outfile=build/lossless-min.js",
"build": "rm -rf build; mkdir build; browserify --standalone jpeg src/main.js -o build/lossless.js; uglifyjs build/lossless.js -o build/lossless-min.js",
"release": "rm release/current/*.js; cp build/*.js release/current/.",

@@ -20,0 +23,0 @@ "doc": "rm -rf build; mkdir build; ./node_modules/.bin/jsdoc2md src/*.js > build/docs.md"

5

README.md

@@ -27,3 +27,3 @@ JPEGLosslessDecoderJS

### Install
Get a packaged source file:
Get a packaged source file from the [release folder](https://github.com/rii-mango/JPEGLosslessDecoderJS/tree/master/release):

@@ -45,9 +45,8 @@ * [lossless.js](https://raw.githubusercontent.com/rii-mango/JPEGLosslessDecoderJS/master/release/current/lossless.js)

### Building
See the [release folder](https://github.com/rii-mango/JPEGLosslessDecoderJS/tree/master/release) for the latest builds or build it yourself using:
```
npm run build
```
This will output lossless.js and lossless-min.js to build/.
This will output lossless.js and lossless-min.js to build/
### Acknowledgments
This decoder was originally written by Helmut Dersch for Java. I added support for selection values 2 through 7, contributed bug fixes and ported to JavaScript.

2

release/current/lossless-min.js

@@ -1,1 +0,1 @@

"use strict";var jpeg=(()=>{var u=(e=>typeof require<"u"?require:typeof Proxy<"u"?new Proxy(e,{get:(s,t)=>(typeof require<"u"?require:s)[t]}):e)(function(e){if(typeof require<"u")return require.apply(this,arguments);throw new Error('Dynamic require of "'+e+'" is not supported')});var y=(e,s)=>()=>(s||e((s={exports:{}}).exports,s),s.exports);var U=y((te,S)=>{"use strict";var T=T||{};T.lossless=T.lossless||{};T.lossless.ComponentSpec=T.lossless.ComponentSpec||function(){this.hSamp=0,this.quantTableSel=0,this.vSamp=0};var X=typeof S;X!=="undefined"&&S.exports&&(S.exports=T.lossless.ComponentSpec)});var E=y((re,v)=>{"use strict";var g=g||{};g.lossless=g.lossless||{};g.lossless.DataStream=g.lossless.DataStream||function(e,s,t){s===void 0&&t===void 0?this.buffer=new Uint8Array(e):this.buffer=new Uint8Array(e,s,t),this.index=0};g.lossless.DataStream.prototype.get16=function(){var e=(this.buffer[this.index]<<8)+this.buffer[this.index+1];return this.index+=2,e};g.lossless.DataStream.prototype.get8=function(){var e=this.buffer[this.index];return this.index+=1,e};var Y=typeof v;Y!=="undefined"&&v.exports&&(v.exports=g.lossless.DataStream)});var w=y((ie,C)=>{"use strict";var p=p||{};p.lossless=p.lossless||{};p.lossless.Utils=p.lossless.Utils||{};p.lossless.Utils.createArray=function(e){var s=new Array(e||0),t=e;if(arguments.length>1)for(var r=Array.prototype.slice.call(arguments,1);t--;)s[e-1-t]=p.lossless.Utils.createArray.apply(this,r);return s};p.lossless.Utils.makeCRCTable=function(){for(var e,s=[],t=0;t<256;t++){e=t;for(var r=0;r<8;r++)e=e&1?3988292384^e>>>1:e>>>1;s[t]=e}return s};p.lossless.Utils.crc32=function(e){for(var s=new Uint8Array(e.buffer),t=p.lossless.Utils.crcTable||(p.lossless.Utils.crcTable=p.lossless.Utils.makeCRCTable()),r=-1,i=0;i<s.length;i++)r=r>>>8^t[(r^s[i])&255];return(r^-1)>>>0};var O=typeof C;O!=="undefined"&&C.exports&&(C.exports=p.lossless.Utils)});var P=y((oe,k)=>{"use strict";var f=f||{};f.lossless=f.lossless||{};f.lossless.DataStream=f.lossless.DataStream||(typeof u<"u"?E():null);f.lossless.Utils=f.lossless.Utils||(typeof u<"u"?w():null);f.lossless.HuffmanTable=f.lossless.HuffmanTable||function(){this.l=f.lossless.Utils.createArray(4,2,16),this.th=[],this.v=f.lossless.Utils.createArray(4,2,16,200),this.tc=f.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};f.lossless.HuffmanTable.MSB=2147483648;f.lossless.HuffmanTable.prototype.read=function(e,s){var t=0,r,i,l,a,n,h;for(r=e.get16(),t+=2;t<r;){if(i=e.get8(),t+=1,l=i&15,l>3)throw new Error("ERROR: Huffman table ID > 3");if(a=i>>4,a>2)throw new Error("ERROR: Huffman table [Table class > 2 ]");for(this.th[l]=1,this.tc[l][a]=1,n=0;n<16;n+=1)this.l[l][a][n]=e.get8(),t+=1;for(n=0;n<16;n+=1)for(h=0;h<this.l[l][a][n];h+=1){if(t>r)throw new Error("ERROR: Huffman table format error [count>Lh]");this.v[l][a][n][h]=e.get8(),t+=1}}if(t!==r)throw new Error("ERROR: Huffman table format error [count!=Lf]");for(n=0;n<4;n+=1)for(h=0;h<2;h+=1)this.tc[n][h]!==0&&this.buildHuffTable(s[n][h],this.l[n][h],this.v[n][h]);return 1};f.lossless.HuffmanTable.prototype.buildHuffTable=function(e,s,t){var r,i,l,a,n,h;for(i=256,l=0,a=0;a<8;a+=1)for(n=0;n<s[a];n+=1)for(h=0;h<i>>a+1;h+=1)e[l]=t[a][n]|a+1<<8,l+=1;for(a=1;l<256;a+=1,l+=1)e[l]=a|f.lossless.HuffmanTable.MSB;for(r=1,l=0,a=8;a<16;a+=1)for(n=0;n<s[a];n+=1){for(h=0;h<i>>a-7;h+=1)e[r*256+l]=t[a][n]|a+1<<8,l+=1;if(l>=256){if(l>256)throw new Error("ERROR: Huffman table error(1)!");l=0,r+=1}}};var j=typeof k;j!=="undefined"&&k.exports&&(k.exports=f.lossless.HuffmanTable)});var _=y((ne,q)=>{"use strict";var m=m||{};m.lossless=m.lossless||{};m.lossless.DataStream=m.lossless.DataStream||(typeof u<"u"?E():null);m.lossless.Utils=m.lossless.Utils||(typeof u<"u"?w():null);m.lossless.QuantizationTable=m.lossless.QuantizationTable||function(){this.precision=[],this.tq=[],this.quantTables=m.lossless.Utils.createArray(4,64),this.tq[0]=0,this.tq[1]=0,this.tq[2]=0,this.tq[3]=0};m.lossless.QuantizationTable.enhanceQuantizationTable=function(e,s){var t;for(t=0;t<8;t+=1)e[s[0*8+t]]*=90,e[s[4*8+t]]*=90,e[s[2*8+t]]*=118,e[s[6*8+t]]*=49,e[s[5*8+t]]*=71,e[s[1*8+t]]*=126,e[s[7*8+t]]*=25,e[s[3*8+t]]*=106;for(t=0;t<8;t+=1)e[s[0+8*t]]*=90,e[s[4+8*t]]*=90,e[s[2+8*t]]*=118,e[s[6+8*t]]*=49,e[s[5+8*t]]*=71,e[s[1+8*t]]*=126,e[s[7+8*t]]*=25,e[s[3+8*t]]*=106;for(t=0;t<64;t+=1)e[t]>>=6};m.lossless.QuantizationTable.prototype.read=function(e,s){var t=0,r,i,l,a;for(r=e.get16(),t+=2;t<r;){if(i=e.get8(),t+=1,l=i&15,l>3)throw new Error("ERROR: Quantization table ID > 3");if(this.precision[l]=i>>4,this.precision[l]===0)this.precision[l]=8;else if(this.precision[l]===1)this.precision[l]=16;else throw new Error("ERROR: Quantization table precision error");if(this.tq[l]=1,this.precision[l]===8){for(a=0;a<64;a+=1){if(t>r)throw new Error("ERROR: Quantization table format error");this.quantTables[l][a]=e.get8(),t+=1}m.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[l],s)}else{for(a=0;a<64;a+=1){if(t>r)throw new Error("ERROR: Quantization table format error");this.quantTables[l][a]=e.get16(),t+=2}m.lossless.QuantizationTable.enhanceQuantizationTable(this.quantTables[l],s)}}if(t!==r)throw new Error("ERROR: Quantization table error [count!=Lq]");return 1};var M=typeof q;M!=="undefined"&&q.exports&&(q.exports=m.lossless.QuantizationTable)});var V=y((he,H)=>{"use strict";var b=b||{};b.lossless=b.lossless||{};b.lossless.ScanComponent=b.lossless.ScanComponent||function(){this.acTabSel=0,this.dcTabSel=0,this.scanCompSel=0};var G=typeof H;G!=="undefined"&&H.exports&&(H.exports=b.lossless.ScanComponent)});var z=y((ue,L)=>{"use strict";var d=d||{};d.lossless=d.lossless||{};d.lossless.DataStream=d.lossless.DataStream||(typeof u<"u"?E():null);d.lossless.ScanComponent=d.lossless.ScanComponent||(typeof u<"u"?V():null);d.lossless.ScanHeader=d.lossless.ScanHeader||function(){this.ah=0,this.al=0,this.numComp=0,this.selection=0,this.spectralEnd=0,this.components=[]};d.lossless.ScanHeader.prototype.read=function(e){var s=0,t,r,i;for(t=e.get16(),s+=2,this.numComp=e.get8(),s+=1,r=0;r<this.numComp;r+=1){if(this.components[r]=new d.lossless.ScanComponent,s>t)throw new Error("ERROR: scan header format error");this.components[r].scanCompSel=e.get8(),s+=1,i=e.get8(),s+=1,this.components[r].dcTabSel=i>>4,this.components[r].acTabSel=i&15}if(this.selection=e.get8(),s+=1,this.spectralEnd=e.get8(),s+=1,i=e.get8(),this.ah=i>>4,this.al=i&15,s+=1,s!==t)throw new Error("ERROR: scan header format error [count!=Ns]");return 1};var K=typeof L;K!=="undefined"&&L.exports&&(L.exports=d.lossless.ScanHeader)});var Q=y((fe,A)=>{"use strict";var F=F||{};F.lossless=F.lossless||{};F.lossless.ComponentSpec=F.lossless.ComponentSpec||(typeof u<"u"?U():null);F.lossless.DataStream=F.lossless.DataStream||(typeof u<"u"?E():null);F.lossless.FrameHeader=F.lossless.FrameHeader||function(){this.components=[],this.dimX=0,this.dimY=0,this.numComp=0,this.precision=0};F.lossless.FrameHeader.prototype.read=function(e){var s=0,t,r,i,l;for(t=e.get16(),s+=2,this.precision=e.get8(),s+=1,this.dimY=e.get16(),s+=2,this.dimX=e.get16(),s+=2,this.numComp=e.get8(),s+=1,r=1;r<=this.numComp;r+=1){if(s>t)throw new Error("ERROR: frame format error");if(i=e.get8(),s+=1,s>=t)throw new Error("ERROR: frame format error [c>=Lf]");l=e.get8(),s+=1,this.components[i]||(this.components[i]=new F.lossless.ComponentSpec),this.components[i].hSamp=l>>4,this.components[i].vSamp=l&15,this.components[i].quantTableSel=e.get8(),s+=1}if(s!==t)throw new Error("ERROR: frame format error [Lf!=count]");return 1};var J=typeof A;J!=="undefined"&&A.exports&&(A.exports=F.lossless.FrameHeader)});var N=y((pe,I)=>{"use strict";var o=o||{};o.lossless=o.lossless||{};o.lossless.DataStream=o.lossless.DataStream||(typeof u<"u"?E():null);o.lossless.HuffmanTable=o.lossless.HuffmanTable||(typeof u<"u"?P():null);o.lossless.QuantizationTable=o.lossless.QuantizationTable||(typeof u<"u"?_():null);o.lossless.ScanHeader=o.lossless.ScanHeader||(typeof u<"u"?z():null);o.lossless.FrameHeader=o.lossless.FrameHeader||(typeof u<"u"?Q():null);o.lossless.Utils=o.lossless.Utils||(typeof u<"u"?w():null);o.lossless.Decoder=o.lossless.Decoder||function(e,s){this.buffer=e,this.frame=new o.lossless.FrameHeader,this.huffTable=new o.lossless.HuffmanTable,this.quantTable=new o.lossless.QuantizationTable,this.scan=new o.lossless.ScanHeader,this.DU=o.lossless.Utils.createArray(10,4,64),this.HuffTab=o.lossless.Utils.createArray(4,2,50*256),this.IDCT_Source=[],this.nBlock=[],this.acTab=o.lossless.Utils.createArray(10,1),this.dcTab=o.lossless.Utils.createArray(10,1),this.qTab=o.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=!1,this.mask=0,typeof s<"u"&&(this.numBytes=s)};o.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];o.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];o.lossless.Decoder.MAX_HUFFMAN_SUBTREE=50;o.lossless.Decoder.MSB=2147483648;o.lossless.Decoder.RESTART_MARKER_BEGIN=65488;o.lossless.Decoder.RESTART_MARKER_END=65495;o.lossless.Decoder.prototype.decompress=function(e,s,t){return this.decode(e,s,t).buffer};o.lossless.Decoder.prototype.decode=function(e,s,t,r){var i,l=0,a=[],n,h,D=[],x=[],R;if(typeof e<"u"&&(this.buffer=e),typeof r<"u"&&(this.numBytes=r),this.stream=new o.lossless.DataStream(this.buffer,s,t),this.buffer=null,this.xLoc=0,this.yLoc=0,i=this.stream.get16(),i!==65496)throw new Error("Not a JPEG file");for(i=this.stream.get16();i>>4!==4092||i===65476;){switch(i){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,o.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(i>>8!==255)throw new Error("ERROR: format throw new IOException! (decode)")}i=this.stream.get16()}if(i<65472||i>65479)throw new Error("ERROR: could not handle arithmetic code!");this.frame.read(this.stream),i=this.stream.get16();do{for(;i!==65498;){switch(i){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,o.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(i>>8!==255)throw new Error("ERROR: format throw new IOException! (Parser.decode)")}i=this.stream.get16()}switch(this.precision=this.frame.precision,this.components=this.frame.components,this.numBytes||(this.numBytes=parseInt(Math.ceil(this.precision/8))),this.numBytes==1?this.mask=255:this.mask=65535,this.scan.read(this.stream),this.numComp=this.scan.numComp,this.selection=this.scan.selection,this.numBytes===1?this.numComp===3?(this.getter=this.getValueRGB,this.setter=this.setValueRGB,this.output=this.outputRGB):(this.getter=this.getValue8,this.setter=this.setValue8,this.output=this.outputSingle):(this.getter=this.getValue16,this.setter=this.setValue16,this.output=this.outputSingle),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}for(this.scanComps=this.scan.components,this.quantTables=this.quantTable.quantTables,n=0;n<this.numComp;n+=1)h=this.scanComps[n].scanCompSel,this.qTab[n]=this.quantTables[this.components[h].quantTableSel],this.nBlock[n]=this.components[h].vSamp*this.components[h].hSamp,this.dcTab[n]=this.HuffTab[this.scanComps[n].dcTabSel][0],this.acTab[n]=this.HuffTab[this.scanComps[n].acTabSel][1];for(this.xDim=this.frame.dimX,this.yDim=this.frame.dimY,this.numBytes==1?this.outputData=new Uint8Array(new ArrayBuffer(this.xDim*this.yDim*this.numBytes*this.numComp)):this.outputData=new Uint16Array(new ArrayBuffer(this.xDim*this.yDim*this.numBytes*this.numComp)),l+=1;;){for(D[0]=0,x[0]=0,n=0;n<10;n+=1)a[n]=1<<this.precision-1;if(this.restartInterval===0){for(i=this.decodeUnit(a,D,x);i===0&&this.xLoc<this.xDim&&this.yLoc<this.yDim;)this.output(a),i=this.decodeUnit(a,D,x);break}for(R=0;R<this.restartInterval&&(this.restarting=R==0,i=this.decodeUnit(a,D,x),this.output(a),i===0);R+=1);if(i===0&&(this.markerIndex!==0?(i=65280|this.marker,this.markerIndex=0):i=this.stream.get16()),!(i>=o.lossless.Decoder.RESTART_MARKER_BEGIN&&i<=o.lossless.Decoder.RESTART_MARKER_END))break}i===65500&&l===1&&(this.readNumber(),i=this.stream.get16())}while(i!==65497&&this.xLoc<this.xDim&&this.yLoc<this.yDim&&l===0);return this.outputData};o.lossless.Decoder.prototype.decodeUnit=function(e,s,t){return this.numComp==1?this.decodeSingle(e,s,t):this.numComp==3?this.decodeRGB(e,s,t):-1};o.lossless.Decoder.prototype.select1=function(e){return this.getPreviousX(e)};o.lossless.Decoder.prototype.select2=function(e){return this.getPreviousY(e)};o.lossless.Decoder.prototype.select3=function(e){return this.getPreviousXY(e)};o.lossless.Decoder.prototype.select4=function(e){return this.getPreviousX(e)+this.getPreviousY(e)-this.getPreviousXY(e)};o.lossless.Decoder.prototype.select5=function(e){return this.getPreviousX(e)+(this.getPreviousY(e)-this.getPreviousXY(e)>>1)};o.lossless.Decoder.prototype.select6=function(e){return this.getPreviousY(e)+(this.getPreviousX(e)-this.getPreviousXY(e)>>1)};o.lossless.Decoder.prototype.select7=function(e){return(this.getPreviousX(e)+this.getPreviousY(e))/2};o.lossless.Decoder.prototype.decodeRGB=function(e,s,t){var r,i,l,a,n,h,D,x;for(e[0]=this.selector(0),e[1]=this.selector(1),e[2]=this.selector(2),n=0;n<this.numComp;n+=1)for(a=this.qTab[n],i=this.acTab[n],l=this.dcTab[n],h=0;h<this.nBlock[n];h+=1){for(D=0;D<this.IDCT_Source.length;D+=1)this.IDCT_Source[D]=0;if(r=this.getHuffmanValue(l,s,t),r>=65280)return r;for(e[n]=this.IDCT_Source[0]=e[n]+this.getn(t,r,s,t),this.IDCT_Source[0]*=a[0],x=1;x<64;x+=1){if(r=this.getHuffmanValue(i,s,t),r>=65280)return r;if(x+=r>>4,r&15)this.IDCT_Source[o.lossless.Decoder.IDCT_P[x]]=this.getn(t,r&15,s,t)*a[x];else if(!(r>>4))break}}return 0};o.lossless.Decoder.prototype.decodeSingle=function(e,s,t){var r,i,l,a;for(this.restarting?(this.restarting=!1,e[0]=1<<this.frame.precision-1):e[0]=this.selector(),i=0;i<this.nBlock[0];i+=1){if(r=this.getHuffmanValue(this.dcTab[0],s,t),r>=65280)return r;if(l=this.getn(e,r,s,t),a=l>>8,a>=o.lossless.Decoder.RESTART_MARKER_BEGIN&&a<=o.lossless.Decoder.RESTART_MARKER_END)return a;e[0]+=l}return 0};o.lossless.Decoder.prototype.getHuffmanValue=function(e,s,t){var r,i,l;if(l=65535,t[0]<8?(s[0]<<=8,i=this.stream.get8(),i===255&&(this.marker=this.stream.get8(),this.marker!==0&&(this.markerIndex=9)),s[0]|=i):t[0]-=8,r=e[s[0]>>t[0]],r&o.lossless.Decoder.MSB){if(this.markerIndex!==0)return this.markerIndex=0,65280|this.marker;s[0]&=l>>16-t[0],s[0]<<=8,i=this.stream.get8(),i===255&&(this.marker=this.stream.get8(),this.marker!==0&&(this.markerIndex=9)),s[0]|=i,r=e[(r&255)*256+(s[0]>>t[0])],t[0]+=8}if(t[0]+=8-(r>>8),t[0]<0)throw new Error("index="+t[0]+" temp="+s[0]+" code="+r+" in HuffmanValue()");return t[0]<this.markerIndex?(this.markerIndex=0,65280|this.marker):(s[0]&=l>>16-t[0],r&255)};o.lossless.Decoder.prototype.getn=function(e,s,t,r){var i,l,a,n,h;if(l=1,a=-1,n=65535,s===0)return 0;if(s===16)return e[0]>=0?-32768:32768;if(r[0]-=s,r[0]>=0){if(r[0]<this.markerIndex&&!this.isLastPixel())return this.markerIndex=0,(65280|this.marker)<<8;i=t[0]>>r[0],t[0]&=n>>16-r[0]}else{if(t[0]<<=8,h=this.stream.get8(),h===255&&(this.marker=this.stream.get8(),this.marker!==0&&(this.markerIndex=9)),t[0]|=h,r[0]+=8,r[0]<0){if(this.markerIndex!==0)return this.markerIndex=0,(65280|this.marker)<<8;t[0]<<=8,h=this.stream.get8(),h===255&&(this.marker=this.stream.get8(),this.marker!==0&&(this.markerIndex=9)),t[0]|=h,r[0]+=8}if(r[0]<0)throw new Error("index="+r[0]+" in getn()");if(r[0]<this.markerIndex)return this.markerIndex=0,(65280|this.marker)<<8;i=t[0]>>r[0],t[0]&=n>>16-r[0]}return i<l<<s-1&&(i+=(a<<s)+1),i};o.lossless.Decoder.prototype.getPreviousX=function(e){return this.xLoc>0?this.getter(this.yLoc*this.xDim+this.xLoc-1,e):this.yLoc>0?this.getPreviousY(e):1<<this.frame.precision-1};o.lossless.Decoder.prototype.getPreviousXY=function(e){return this.xLoc>0&&this.yLoc>0?this.getter((this.yLoc-1)*this.xDim+this.xLoc-1,e):this.getPreviousY(e)};o.lossless.Decoder.prototype.getPreviousY=function(e){return this.yLoc>0?this.getter((this.yLoc-1)*this.xDim+this.xLoc,e):this.getPreviousX(e)};o.lossless.Decoder.prototype.isLastPixel=function(){return this.xLoc===this.xDim-1&&this.yLoc===this.yDim-1};o.lossless.Decoder.prototype.outputSingle=function(e){this.xLoc<this.xDim&&this.yLoc<this.yDim&&(this.setter(this.yLoc*this.xDim+this.xLoc,this.mask&e[0]),this.xLoc+=1,this.xLoc>=this.xDim&&(this.yLoc+=1,this.xLoc=0))};o.lossless.Decoder.prototype.outputRGB=function(e){var s=this.yLoc*this.xDim+this.xLoc;this.xLoc<this.xDim&&this.yLoc<this.yDim&&(this.setter(s,e[0],0),this.setter(s,e[1],1),this.setter(s,e[2],2),this.xLoc+=1,this.xLoc>=this.xDim&&(this.yLoc+=1,this.xLoc=0))};o.lossless.Decoder.prototype.setValue8=function(e,s){this.outputData[e]=s};o.lossless.Decoder.prototype.getValue8=function(e){return this.outputData[e]};var W=function(){var e=new ArrayBuffer(2);return new DataView(e).setInt16(0,256,!0),new Int16Array(e)[0]===256}();W?(o.lossless.Decoder.prototype.setValue16=o.lossless.Decoder.prototype.setValue8,o.lossless.Decoder.prototype.getValue16=o.lossless.Decoder.prototype.getValue8):(o.lossless.Decoder.prototype.setValue16=function(e,s){this.outputData[e]=(s&255)<<8|s>>8&255},o.lossless.Decoder.prototype.getValue16=function(e){var s=this.outputData[e];return(s&255)<<8|s>>8&255});o.lossless.Decoder.prototype.setValueRGB=function(e,s,t){this.outputData[e*3+t]=s};o.lossless.Decoder.prototype.getValueRGB=function(e,s){return this.outputData[e*3+s]};o.lossless.Decoder.prototype.readApp=function(){var e=0,s=this.stream.get16();for(e+=2;e<s;)this.stream.get8(),e+=1;return s};o.lossless.Decoder.prototype.readComment=function(){var e="",s=0,t;for(t=this.stream.get16(),s+=2;s<t;)e+=this.stream.get8(),s+=1;return e};o.lossless.Decoder.prototype.readNumber=function(){var e=this.stream.get16();if(e!==4)throw new Error("ERROR: Define number format throw new IOException [Ld!=4]");return this.stream.get16()};var Z=typeof I;Z!=="undefined"&&I.exports&&(I.exports=o.lossless.Decoder)});var ee=y((Fe,B)=>{var c=c||{};c.lossless=c.lossless||{};c.lossless.ComponentSpec=c.lossless.ComponentSpec||(typeof u<"u"?U():null);c.lossless.DataStream=c.lossless.DataStream||(typeof u<"u"?E():null);c.lossless.Decoder=c.lossless.Decoder||(typeof u<"u"?N():null);c.lossless.FrameHeader=c.lossless.FrameHeader||(typeof u<"u"?Q():null);c.lossless.HuffmanTable=c.lossless.HuffmanTable||(typeof u<"u"?P():null);c.lossless.QuantizationTable=c.lossless.QuantizationTable||(typeof u<"u"?_():null);c.lossless.ScanComponent=c.lossless.ScanComponent||(typeof u<"u"?V():null);c.lossless.ScanHeader=c.lossless.ScanHeader||(typeof u<"u"?z():null);c.lossless.Utils=c.lossless.Utils||(typeof u<"u"?w():null);var $=typeof B;$!=="undefined"&&B.exports&&(B.exports=c)});return ee();})();
(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(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r}()({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){if(offset===undefined&&length===undefined){this.buffer=new Uint8Array(data)}else{this.buffer=new Uint8Array(data,offset,length)}this.index=0};jpeg.lossless.DataStream.prototype.get16=function(){var value=(this.buffer[this.index]<<8)+this.buffer[this.index+1];this.index+=2;return value};jpeg.lossless.DataStream.prototype.get8=function(){var value=this.buffer[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;if(this.numBytes==1){this.outputData=new Uint8Array(new ArrayBuffer(this.xDim*this.yDim*this.numBytes*this.numComp))}else{this.outputData=new Uint16Array(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.setValue8=function(index,val){this.outputData[index]=val};jpeg.lossless.Decoder.prototype.getValue8=function(index){return this.outputData[index]};var littleEndian=function(){var buffer=new ArrayBuffer(2);new DataView(buffer).setInt16(0,256,true);return new Int16Array(buffer)[0]===256}();if(littleEndian){jpeg.lossless.Decoder.prototype.setValue16=jpeg.lossless.Decoder.prototype.setValue8;jpeg.lossless.Decoder.prototype.getValue16=jpeg.lossless.Decoder.prototype.getValue8}else{jpeg.lossless.Decoder.prototype.setValue16=function(index,val){this.outputData[index]=(val&255)<<8|val>>8&255};jpeg.lossless.Decoder.prototype.getValue16=function(index){var val=this.outputData[index];return(val&255)<<8|val>>8&255}}jpeg.lossless.Decoder.prototype.setValueRGB=function(index,val,compOffset){this.outputData[index*3+compOffset]=val};jpeg.lossless.Decoder.prototype.getValueRGB=function(index,compOffset){return this.outputData[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 uint8view=new Uint8Array(dataView.buffer);var crcTable=jpeg.lossless.Utils.crcTable||(jpeg.lossless.Utils.crcTable=jpeg.lossless.Utils.makeCRCTable());var crc=0^-1;for(var i=0;i<uint8view.length;i++){crc=crc>>>8^crcTable[(crc^uint8view[i])&255]}return(crc^-1)>>>0};var moduleType=typeof module;if(moduleType!=="undefined"&&module.exports){module.exports=jpeg.lossless.Utils}},{}]},{},[6])(6)});

2709

release/current/lossless.js

@@ -0,783 +1,431 @@

(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(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
var jpeg = (() => {
var __getOwnPropNames = Object.getOwnPropertyNames;
var __require = /* @__PURE__ */ ((x) => typeof require !== "undefined" ? require : typeof Proxy !== "undefined" ? new Proxy(x, {
get: (a, b) => (typeof require !== "undefined" ? require : a)[b]
}) : x)(function(x) {
if (typeof require !== "undefined")
return require.apply(this, arguments);
throw new Error('Dynamic require of "' + x + '" is not supported');
});
var __commonJS = (cb, mod) => function __require2() {
return mod || (0, cb[__getOwnPropNames(cb)[0]])((mod = { exports: {} }).exports, mod), mod.exports;
};
// src/component-spec.js
var require_component_spec = __commonJS({
"src/component-spec.js"(exports, module) {
"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;
}
}
});
/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
// src/data-stream.js
var require_data_stream = __commonJS({
"src/data-stream.js"(exports, module) {
"use strict";
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || function(data, offset, length) {
if (offset === void 0 && length === void 0) {
this.buffer = new Uint8Array(data);
} else {
this.buffer = new Uint8Array(data, offset, length);
}
this.index = 0;
};
jpeg.lossless.DataStream.prototype.get16 = function() {
var value = (this.buffer[this.index] << 8) + this.buffer[this.index + 1];
this.index += 2;
return value;
};
jpeg.lossless.DataStream.prototype.get8 = function() {
var value = this.buffer[this.index];
this.index += 1;
return value;
};
var moduleType = typeof module;
if (moduleType !== "undefined" && module.exports) {
module.exports = jpeg.lossless.DataStream;
}
}
});
// src/utils.js
var require_utils = __commonJS({
"src/utils.js"(exports, module) {
"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 uint8view = new Uint8Array(dataView.buffer);
var crcTable = jpeg.lossless.Utils.crcTable || (jpeg.lossless.Utils.crcTable = jpeg.lossless.Utils.makeCRCTable());
var crc = 0 ^ -1;
for (var i = 0; i < uint8view.length; i++) {
crc = crc >>> 8 ^ crcTable[(crc ^ uint8view[i]) & 255];
}
return (crc ^ -1) >>> 0;
};
var moduleType = typeof module;
if (moduleType !== "undefined" && module.exports) {
module.exports = jpeg.lossless.Utils;
}
}
});
/*** Constructor ***/
jpeg.lossless.ComponentSpec = jpeg.lossless.ComponentSpec || function () {
this.hSamp = 0; // Horizontal sampling factor
this.quantTableSel = 0; // Quantization table destination selector
this.vSamp = 0; // Vertical
};
// src/huffman-table.js
var require_huffman_table = __commonJS({
"src/huffman-table.js"(exports, module) {
"use strict";
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || (typeof __require !== "undefined" ? require_data_stream() : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || (typeof __require !== "undefined" ? require_utils() : 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;
}
/*** Exports ***/
var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
module.exports = jpeg.lossless.ComponentSpec;
}
},{}],2:[function(require,module,exports){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
/*** Constructor ***/
jpeg.lossless.DataStream = jpeg.lossless.DataStream || function (data, offset, length) {
if (offset === undefined && length === undefined) { // Old api
this.buffer = new Uint8Array(data);
} else {
this.buffer = new Uint8Array(data, offset, length);
}
});
this.index = 0;
};
// src/quantization-table.js
var require_quantization_table = __commonJS({
"src/quantization-table.js"(exports, module) {
"use strict";
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || (typeof __require !== "undefined" ? require_data_stream() : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || (typeof __require !== "undefined" ? require_utils() : 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;
}
jpeg.lossless.DataStream.prototype.get16 = function () {
// var value = this.buffer.getUint16(this.index, false);
var value = (this.buffer[this.index] << 8) + this.buffer[this.index + 1]; // DataView is big-endian by default
this.index += 2;
return value;
};
jpeg.lossless.DataStream.prototype.get8 = function () {
// var value = this.buffer.getUint8(this.index);
var value = this.buffer[this.index];
this.index += 1;
return value;
};
/*** Exports ***/
var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
module.exports = jpeg.lossless.DataStream;
}
},{}],3:[function(require,module,exports){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
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);
/*** Constructor ***/
/**
* The Decoder constructor.
* @property {number} xDim - size of x dimension
* @property {number} yDim - size of y dimension
* @property {number} numComp - number of components
* @property {number} numBytes - number of bytes per component
* @type {Function}
*/
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); // at most 10 data units in a MCU, at most 4 data units in one component
this.HuffTab = jpeg.lossless.Utils.createArray(4, 2, 50 * 256);
this.IDCT_Source = [];
this.nBlock = []; // number of blocks in the i-th Comp in a scan
this.acTab = jpeg.lossless.Utils.createArray(10, 1); // ac HuffTab for the i-th Comp in a scan
this.dcTab = jpeg.lossless.Utils.createArray(10, 1); // dc HuffTab for the i-th Comp in a scan
this.qTab = jpeg.lossless.Utils.createArray(10, 1); // quantization table for the i-th Comp in a scan
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;
}
});
};
// src/scan-component.js
var require_scan_component = __commonJS({
"src/scan-component.js"(exports, module) {
"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;
}
/*** Static Pseudo-constants ***/
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 = 0x80000000;
jpeg.lossless.Decoder.RESTART_MARKER_BEGIN = 0xFFD0;
jpeg.lossless.Decoder.RESTART_MARKER_END = 0xFFD7;
/*** Prototype Methods ***/
/**
* Returns decompressed data.
* @param {ArrayBuffer} buffer
* @param {number} [offset]
* @param {number} [length]
* @returns {ArrayBufer}
*/
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) {
/*jslint bitwise: true */
var current, scanNum = 0, pred = [], i, compN, temp = [], index = [], mcuNum;
if (typeof buffer !== "undefined") {
this.buffer = buffer;
}
});
// src/scan-header.js
var require_scan_header = __commonJS({
"src/scan-header.js"(exports, module) {
"use strict";
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || (typeof __require !== "undefined" ? require_data_stream() : null);
jpeg.lossless.ScanComponent = jpeg.lossless.ScanComponent || (typeof __require !== "undefined" ? require_scan_component() : 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;
}
if (typeof numBytes !== "undefined") {
this.numBytes = numBytes;
}
});
// src/frame-header.js
var require_frame_header = __commonJS({
"src/frame-header.js"(exports, module) {
"use strict";
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.ComponentSpec = jpeg.lossless.ComponentSpec || (typeof __require !== "undefined" ? require_component_spec() : null);
jpeg.lossless.DataStream = jpeg.lossless.DataStream || (typeof __require !== "undefined" ? require_data_stream() : 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;
}
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 !== 0xFFD8) { // SOI
throw new Error("Not a JPEG file");
}
});
// src/decoder.js
var require_decoder = __commonJS({
"src/decoder.js"(exports, module) {
"use strict";
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.DataStream = jpeg.lossless.DataStream || (typeof __require !== "undefined" ? require_data_stream() : null);
jpeg.lossless.HuffmanTable = jpeg.lossless.HuffmanTable || (typeof __require !== "undefined" ? require_huffman_table() : null);
jpeg.lossless.QuantizationTable = jpeg.lossless.QuantizationTable || (typeof __require !== "undefined" ? require_quantization_table() : null);
jpeg.lossless.ScanHeader = jpeg.lossless.ScanHeader || (typeof __require !== "undefined" ? require_scan_header() : null);
jpeg.lossless.FrameHeader = jpeg.lossless.FrameHeader || (typeof __require !== "undefined" ? require_frame_header() : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || (typeof __require !== "undefined" ? require_utils() : 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:
current = this.stream.get16();
while ((((current >> 4) !== 0x0FFC) || (current === 0xFFC4))) { // SOF 0~15
switch (current) {
case 0xFFC4: // DHT
this.huffTable.read(this.stream, this.HuffTab);
break;
case 65484:
case 0xFFCC: // DAC
throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");
case 65499:
case 0xFFDB:
this.quantTable.read(this.stream, jpeg.lossless.Decoder.TABLE);
break;
case 65501:
case 0xFFDD:
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:
case 0xFFE0:
case 0xFFE1:
case 0xFFE2:
case 0xFFE3:
case 0xFFE4:
case 0xFFE5:
case 0xFFE6:
case 0xFFE7:
case 0xFFE8:
case 0xFFE9:
case 0xFFEA:
case 0xFFEB:
case 0xFFEC:
case 0xFFED:
case 0xFFEE:
case 0xFFEF:
this.readApp();
break;
case 65534:
case 0xFFFE:
this.readComment();
break;
default:
if (current >> 8 !== 255) {
throw new Error("ERROR: format throw new IOException! (Parser.decode)");
default:
if ((current >> 8) !== 0xFF) {
throw new Error("ERROR: format throw new IOException! (decode)");
}
}
current = this.stream.get16();
}
if ((current < 0xFFC0) || (current > 0xFFC7)) {
throw new Error("ERROR: could not handle arithmetic code!");
}
this.frame.read(this.stream);
current = this.stream.get16();
do {
while (current !== 0x0FFDA) { // SOS
switch (current) {
case 0xFFC4: // DHT
this.huffTable.read(this.stream, this.HuffTab);
break;
case 0xFFCC: // DAC
throw new Error("Program doesn't support arithmetic coding. (format throw new IOException)");
case 0xFFDB:
this.quantTable.read(this.stream, jpeg.lossless.Decoder.TABLE);
break;
case 0xFFDD:
this.restartInterval = this.readNumber();
break;
case 0xFFE0:
case 0xFFE1:
case 0xFFE2:
case 0xFFE3:
case 0xFFE4:
case 0xFFE5:
case 0xFFE6:
case 0xFFE7:
case 0xFFE8:
case 0xFFE9:
case 0xFFEA:
case 0xFFEB:
case 0xFFEC:
case 0xFFED:
case 0xFFEE:
case 0xFFEF:
this.readApp();
break;
case 0xFFFE:
this.readComment();
break;
default:
if ((current >> 8) !== 0xFF) {
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.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.numBytes == 1) {
this.mask = 0xFF;
} else {
this.mask = 0xFFFF;
}
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;
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;
this.getter = this.getValue8;
this.setter = this.setValue8;
this.output = this.outputSingle;
}
} else {
} else {
this.getter = this.getValue16;
this.setter = this.setValue16;
this.output = this.outputSingle;
}
switch (this.selection) {
}
switch (this.selection) {
case 2:
this.selector = this.select2;
break;
this.selector = this.select2;
break;
case 3:
this.selector = this.select3;
break;
this.selector = this.select3;
break;
case 4:
this.selector = this.select4;
break;
this.selector = this.select4;
break;
case 5:
this.selector = this.select5;
break;
this.selector = this.select5;
break;
case 6:
this.selector = this.select6;
break;
this.selector = this.select6;
break;
case 7:
this.selector = this.select7;
break;
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) {
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;

@@ -788,389 +436,1324 @@ this.qTab[i] = this.quantTables[this.components[compN].quantTableSel];

this.acTab[i] = this.HuffTab[this.scanComps[i].acTabSel][1];
}
this.xDim = this.frame.dimX;
this.yDim = this.frame.dimY;
if (this.numBytes == 1) {
}
this.xDim = this.frame.dimX;
this.yDim = this.frame.dimY;
if (this.numBytes == 1) {
this.outputData = new Uint8Array(new ArrayBuffer(this.xDim * this.yDim * this.numBytes * this.numComp));
} else {
} else {
this.outputData = new Uint16Array(new ArrayBuffer(this.xDim * this.yDim * this.numBytes * this.numComp));
}
scanNum += 1;
while (true) {
}
scanNum+=1;
while (true) { // Decode one scan
temp[0] = 0;
index[0] = 0;
for (i = 0; i < 10; i += 1) {
pred[i] = 1 << this.precision - 1;
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;
while ((current === 0) && ((this.xLoc < this.xDim) && (this.yLoc < this.yDim))) {
this.output(pred);
current = this.decodeUnit(pred, temp, index);
}
break; //current=MARKER
}
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;
}
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 (this.markerIndex !== 0) {
current = (0xFF00 | 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 >= jpeg.lossless.Decoder.RESTART_MARKER_BEGIN) &&
(current <= jpeg.lossless.Decoder.RESTART_MARKER_END))) {
break; //current=MARKER
}
}
if (current === 65500 && scanNum === 1) {
}
if ((current === 0xFFDC) && (scanNum === 1)) { //DNL
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;
} while ((current !== 0xFFD9) && ((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) {
/*jslint bitwise: true */
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;
if (value >= 0xFF00) {
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;
for (j = 1; j < 64; j+=1) {
value = this.getHuffmanValue(actab, temp, index);
if (value >= 0xFF00) {
return value;
}
} else {
this.IDCT_Source[jpeg.lossless.Decoder.IDCT_P[j]] = this.getn(index, value & 15, temp, index) * qtab[j];
}
j += (value >> 4);
if ((value & 0x0F) === 0) {
if ((value >> 4) === 0) {
break;
}
} else {
this.IDCT_Source[jpeg.lossless.Decoder.IDCT_P[j]] = this.getn(index, value & 0x0F, 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();
}
return 0;
};
jpeg.lossless.Decoder.prototype.decodeSingle = function (prev, temp, index) {
/*jslint bitwise: true */
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 >= 0xFF00) {
return value;
}
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) {
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) {
prev[0] += n;
}
return 0;
};
// Huffman table for fast search: (HuffTab) 8-bit Look up table 2-layer search architecture, 1st-layer represent 256 node (8 bits) if codeword-length > 8
// bits, then the entry of 1st-layer = (# of 2nd-layer table) | MSB and it is stored in the 2nd-layer Size of tables in each layer are 256.
// HuffTab[*][*][0-256] is always the only 1st-layer table.
//
// An entry can be: (1) (# of 2nd-layer table) | MSB , for code length > 8 in 1st-layer (2) (Code length) << 8 | HuffVal
//
// HuffmanValue(table HuffTab[x][y] (ex) HuffmanValue(HuffTab[1][0],...)
// ):
// return: Huffman Value of table
// 0xFF?? if it receives a MARKER
// Parameter: table HuffTab[x][y] (ex) HuffmanValue(HuffTab[1][0],...)
// temp temp storage for remainded bits
// index index to bit of temp
// in FILE pointer
// Effect:
// temp store new remainded bits
// index change to new index
// in change to new position
// NOTE:
// Initial by temp=0; index=0;
// NOTE: (explain temp and index)
// temp: is always in the form at calling time or returning time
// | byte 4 | byte 3 | byte 2 | byte 1 |
// | 0 | 0 | 00000000 | 00000??? | if not a MARKER
// ^index=3 (from 0 to 15)
// 321
// NOTE (marker and marker_index):
// If get a MARKER from 'in', marker=the low-byte of the MARKER
// and marker_index=9
// If marker_index=9 then index is always > 8, or HuffmanValue()
// will not be called
jpeg.lossless.Decoder.prototype.getHuffmanValue = function (table, temp, index) {
/*jslint bitwise: true */
var code, input, mask;
mask = 0xFFFF;
if (index[0] < 8) {
temp[0] <<= 8;
input = this.stream.get8();
if (input === 0xFF) {
this.marker = this.stream.get8();
if (this.marker !== 0) {
this.markerIndex = 9;
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) {
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) {
return 0xFF00 | this.marker;
}
temp[0] &= (mask >> (16 - index[0]));
temp[0] <<= 8;
input = this.stream.get8();
if (input === 0xFF) {
this.marker = this.stream.get8();
if (this.marker !== 0) {
this.markerIndex = 9;
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) {
temp[0] |= input;
code = table[((code & 0xFF) * 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 0xFF00 | this.marker;
}
temp[0] &= (mask >> (16 - index[0]));
return code & 0xFF;
};
jpeg.lossless.Decoder.prototype.getn = function (PRED, n, temp, index) {
/*jslint bitwise: true */
var result, one, n_one, mask, input;
one = 1;
n_one = -1;
mask = 0xFFFF;
if (n === 0) {
return 0;
}
if (n === 16) {
if (PRED[0] >= 0) {
return -32768;
} else {
} else {
return 32768;
}
}
index[0] -= n;
if (index[0] >= 0) {
if (index[0] < this.markerIndex && !this.isLastPixel()) {
}
index[0] -= n;
if (index[0] >= 0) {
if ((index[0] < this.markerIndex) && !this.isLastPixel()) { // this was corrupting the last pixel in some cases
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) {
return (0xFF00 | this.marker) << 8;
}
result = temp[0] >> index[0];
temp[0] &= (mask >> (16 - index[0]));
} else {
temp[0] <<= 8;
input = this.stream.get8();
if (input === 0xFF) {
this.marker = this.stream.get8();
if (this.marker !== 0) {
this.markerIndex = 9;
this.markerIndex = 9;
}
}
temp[0] |= input;
index[0] += 8;
if (index[0] < 0) {
}
temp[0] |= input;
index[0] += 8;
if (index[0] < 0) {
if (this.markerIndex !== 0) {
this.markerIndex = 0;
return (65280 | this.marker) << 8;
this.markerIndex = 0;
return (0xFF00 | 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;
}
if (input === 0xFF) {
this.marker = this.stream.get8();
if (this.marker !== 0) {
this.markerIndex = 9;
}
}
temp[0] |= input;
index[0] += 8;
}
if (index[0] < 0) {
}
if (index[0] < 0) {
throw new Error("index=" + index[0] + " in getn()");
}
if (index[0] < this.markerIndex) {
}
if (index[0] < this.markerIndex) {
this.markerIndex = 0;
return (65280 | this.marker) << 8;
}
result = temp[0] >> index[0];
temp[0] &= mask >> 16 - index[0];
return (0xFF00 | this.marker) << 8;
}
if (result < one << n - 1) {
result += (n_one << n) + 1;
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) {
/*jslint bitwise: true */
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) {
/*jslint bitwise: true */
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) {
/*jslint bitwise: true */
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;
}
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.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.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.setValue8 = function (index, val) {
this.outputData[index] = val;
};
jpeg.lossless.Decoder.prototype.getValue8 = function (index) {
return this.outputData[index]; // mask should not be necessary because outputData is either Int8Array or Int16Array
};
var littleEndian = (function() {
var buffer = new ArrayBuffer(2);
new DataView(buffer).setInt16(0, 256, true /* littleEndian */);
// Int16Array uses the platform's endianness.
return new Int16Array(buffer)[0] === 256;
})();
if (littleEndian) {
// just reading from an array is fine then. Int16Array will use platform endianness.
jpeg.lossless.Decoder.prototype.setValue16 = jpeg.lossless.Decoder.prototype.setValue8;
jpeg.lossless.Decoder.prototype.getValue16 = jpeg.lossless.Decoder.prototype.getValue8;
}
else {
// If platform is big-endian, we will need to convert to little-endian
jpeg.lossless.Decoder.prototype.setValue16 = function (index, val) {
this.outputData[index] = ((val & 0xFF) << 8) | ((val >> 8) & 0xFF);
};
jpeg.lossless.Decoder.prototype.getValue16 = function (index) {
var val = this.outputData[index];
return ((val & 0xFF) << 8) | ((val >> 8) & 0xFF);
};
}
jpeg.lossless.Decoder.prototype.setValueRGB = function (index, val, compOffset) {
// this.outputData.setUint8(index * 3 + compOffset, val);
this.outputData[index * 3 + compOffset] = val;
};
jpeg.lossless.Decoder.prototype.getValueRGB = function (index, compOffset) {
// return this.outputData.getUint8(index * 3 + compOffset);
return this.outputData[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();
};
/*** Exports ***/
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){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
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);
/*** Constructor ***/
jpeg.lossless.FrameHeader = jpeg.lossless.FrameHeader || function () {
this.components = []; // Components
this.dimX = 0; // Number of samples per line
this.dimY = 0; // Number of lines
this.numComp = 0; // Number of component in the frame
this.precision = 0; // Sample Precision (from the original image)
};
/*** Prototype Methods ***/
jpeg.lossless.FrameHeader.prototype.read = function (data) {
/*jslint bitwise: true */
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");
}
};
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);
c = data.get8();
count+=1;
if (count >= length) {
throw new Error("ERROR: frame format error [c>=Lf]");
}
};
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;
}
temp = data.get8();
count+=1;
if (!this.components[c]) {
this.components[c] = new jpeg.lossless.ComponentSpec();
}
};
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;
}
this.components[c].hSamp = temp >> 4;
this.components[c].vSamp = temp & 0x0F;
this.components[c].quantTableSel = data.get8();
count+=1;
}
if (count !== length) {
throw new Error("ERROR: frame format error [Lf!=count]");
}
return 1;
};
/*** Exports ***/
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){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
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);
/*** Constructor ***/
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;
};
/*** Static Pseudo-constants ***/
jpeg.lossless.HuffmanTable.MSB = 0x80000000;
/*** Prototype Methods ***/
jpeg.lossless.HuffmanTable.prototype.read = function(data, HuffTab) {
/*jslint bitwise: true */
var count = 0, length, temp, t, c, i, j;
length = data.get16();
count += 2;
while (count < length) {
temp = data.get8();
count+=1;
t = temp & 0x0F;
if (t > 3) {
throw new Error("ERROR: Huffman table ID > 3");
}
};
jpeg.lossless.Decoder.prototype.setValue8 = function(index, val) {
this.outputData[index] = val;
};
jpeg.lossless.Decoder.prototype.getValue8 = function(index) {
return this.outputData[index];
};
var littleEndian = function() {
var buffer = new ArrayBuffer(2);
new DataView(buffer).setInt16(
0,
256,
true
/* littleEndian */
);
return new Int16Array(buffer)[0] === 256;
}();
if (littleEndian) {
jpeg.lossless.Decoder.prototype.setValue16 = jpeg.lossless.Decoder.prototype.setValue8;
jpeg.lossless.Decoder.prototype.getValue16 = jpeg.lossless.Decoder.prototype.getValue8;
} else {
jpeg.lossless.Decoder.prototype.setValue16 = function(index, val) {
this.outputData[index] = (val & 255) << 8 | val >> 8 & 255;
};
jpeg.lossless.Decoder.prototype.getValue16 = function(index) {
var val = this.outputData[index];
return (val & 255) << 8 | val >> 8 & 255;
};
}
jpeg.lossless.Decoder.prototype.setValueRGB = function(index, val, compOffset) {
this.outputData[index * 3 + compOffset] = val;
};
jpeg.lossless.Decoder.prototype.getValueRGB = function(index, compOffset) {
return this.outputData[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;
c = temp >> 4;
if (c > 2) {
throw new Error("ERROR: Huffman table [Table class > 2 ]");
}
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;
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;
}
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]");
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;
}
}
return this.stream.get16();
};
var moduleType = typeof module;
if (moduleType !== "undefined" && module.exports) {
module.exports = jpeg.lossless.Decoder;
}
}
});
// src/main.js
var require_main = __commonJS({
"src/main.js"(exports, module) {
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
jpeg.lossless.ComponentSpec = jpeg.lossless.ComponentSpec || (typeof __require !== "undefined" ? require_component_spec() : null);
jpeg.lossless.DataStream = jpeg.lossless.DataStream || (typeof __require !== "undefined" ? require_data_stream() : null);
jpeg.lossless.Decoder = jpeg.lossless.Decoder || (typeof __require !== "undefined" ? require_decoder() : null);
jpeg.lossless.FrameHeader = jpeg.lossless.FrameHeader || (typeof __require !== "undefined" ? require_frame_header() : null);
jpeg.lossless.HuffmanTable = jpeg.lossless.HuffmanTable || (typeof __require !== "undefined" ? require_huffman_table() : null);
jpeg.lossless.QuantizationTable = jpeg.lossless.QuantizationTable || (typeof __require !== "undefined" ? require_quantization_table() : null);
jpeg.lossless.ScanComponent = jpeg.lossless.ScanComponent || (typeof __require !== "undefined" ? require_scan_component() : null);
jpeg.lossless.ScanHeader = jpeg.lossless.ScanHeader || (typeof __require !== "undefined" ? require_scan_header() : null);
jpeg.lossless.Utils = jpeg.lossless.Utils || (typeof __require !== "undefined" ? require_utils() : null);
var moduleType = typeof module;
if (moduleType !== "undefined" && module.exports) {
module.exports = jpeg;
}
if (count !== length) {
throw new Error("ERROR: Huffman table format error [count!=Lf]");
}
});
return require_main();
})();
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;
};
// Build_HuffTab()
// Parameter: t table ID
// c table class ( 0 for DC, 1 for AC )
// L[i] # of codewords which length is i
// V[i][j] Huffman Value (length=i)
// Effect:
// build up HuffTab[t][c] using L and V.
jpeg.lossless.HuffmanTable.prototype.buildHuffTable = function(tab, L, V) {
/*jslint bitwise: true */
var currentTable, temp, k, i, j, n;
temp = 256;
k = 0;
for (i = 0; i < 8; i+=1) { // i+1 is Code length
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) { // i+1 is Code length
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;
}
}
}
};
/*** Exports ***/
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){
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ****/
/**
* jpeg
* @type {*|{}}
*/
var jpeg = jpeg || {};
/**
* jpeg.lossless
* @type {*|{}}
*/
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);
/*** Exports ***/
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){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
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);
/*** Constructor ***/
jpeg.lossless.QuantizationTable = jpeg.lossless.QuantizationTable || function () {
this.precision = []; // Quantization precision 8 or 16
this.tq = []; // 1: this table is presented
this.quantTables = jpeg.lossless.Utils.createArray(4, 64); // Tables
this.tq[0] = 0;
this.tq[1] = 0;
this.tq[2] = 0;
this.tq[3] = 0;
};
/*** Static Methods ***/
jpeg.lossless.QuantizationTable.enhanceQuantizationTable = function(qtab, table) {
/*jslint bitwise: true */
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;
}
};
/*** Prototype Methods ***/
jpeg.lossless.QuantizationTable.prototype.read = function (data, table) {
/*jslint bitwise: true */
var count = 0, length, temp, t, i;
length = data.get16();
count += 2;
while (count < length) {
temp = data.get8();
count+=1;
t = temp & 0x0F;
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;
};
/*** Exports ***/
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){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
/*** Constructor ***/
jpeg.lossless.ScanComponent = jpeg.lossless.ScanComponent || function () {
this.acTabSel = 0; // AC table selector
this.dcTabSel = 0; // DC table selector
this.scanCompSel = 0; // Scan component selector
};
/*** Exports ***/
var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
module.exports = jpeg.lossless.ScanComponent;
}
},{}],9:[function(require,module,exports){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
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);
/*** Constructor ***/
jpeg.lossless.ScanHeader = jpeg.lossless.ScanHeader || function () {
this.ah = 0;
this.al = 0;
this.numComp = 0; // Number of components in the scan
this.selection = 0; // Start of spectral or predictor selection
this.spectralEnd = 0; // End of spectral selection
this.components = [];
};
/*** Prototype Methods ***/
jpeg.lossless.ScanHeader.prototype.read = function(data) {
/*jslint bitwise: true */
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 & 0x0F);
}
this.selection = data.get8();
count+=1;
this.spectralEnd = data.get8();
count+=1;
temp = data.get8();
this.ah = (temp >> 4);
this.al = (temp & 0x0F);
count+=1;
if (count !== length) {
throw new Error("ERROR: scan header format error [count!=Ns]");
}
return 1;
};
/*** Exports ***/
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){
/*
* Copyright (C) 2015 Michael Martinez
* Changes: Added support for selection values 2-7, fixed minor bugs &
* warnings, split into multiple class files, and general clean up.
*
* 08-25-2015: Helmut Dersch agreed to a license change from LGPL to MIT.
*/
/*
* Copyright (C) Helmut Dersch
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
/*jslint browser: true, node: true */
/*global require, module */
"use strict";
/*** Imports ***/
var jpeg = jpeg || {};
jpeg.lossless = jpeg.lossless || {};
/*** Constructor ***/
jpeg.lossless.Utils = jpeg.lossless.Utils || {};
/*** Static methods ***/
// http://stackoverflow.com/questions/966225/how-can-i-create-a-two-dimensional-array-in-javascript
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;
};
// http://stackoverflow.com/questions/18638900/javascript-crc32
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) ? (0xEDB88320 ^ (c >>> 1)) : (c >>> 1));
}
crcTable[n] = c;
}
return crcTable;
};
jpeg.lossless.Utils.crc32 = function(dataView) {
var uint8view = new Uint8Array(dataView.buffer);
var crcTable = jpeg.lossless.Utils.crcTable || (jpeg.lossless.Utils.crcTable = jpeg.lossless.Utils.makeCRCTable());
var crc = 0 ^ (-1);
for (var i = 0; i < uint8view.length; i++ ) {
crc = (crc >>> 8) ^ crcTable[(crc ^ uint8view[i]) & 0xFF];
}
return (crc ^ (-1)) >>> 0;
};
/*** Exports ***/
var moduleType = typeof module;
if ((moduleType !== 'undefined') && module.exports) {
module.exports = jpeg.lossless.Utils;
}
},{}]},{},[6])(6)
});
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