| Index: trunk/phase3/resources/mediawiki.libs/mediawiki.libs.jpegmeta.js |
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| | 2 | +/* This is JsJpegMeta 1.0, ported to MediaWiki ResourceLoader by Bryan Tong Minh */ |
| | 3 | +/* The following lines where changed with respect to the original: 54, 625-627 */ |
| | 4 | + |
| | 5 | +(function( $ ) { |
| | 6 | + |
| | 7 | + /* JsJpegMeta starts here */ |
| | 8 | + |
| | 9 | + /* |
| | 10 | + Copyright (c) 2009 Ben Leslie |
| | 11 | + |
| | 12 | + Permission is hereby granted, free of charge, to any person obtaining a copy |
| | 13 | + of this software and associated documentation files (the "Software"), to deal |
| | 14 | + in the Software without restriction, including without limitation the rights |
| | 15 | + to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| | 16 | + copies of the Software, and to permit persons to whom the Software is |
| | 17 | + furnished to do so, subject to the following conditions: |
| | 18 | + |
| | 19 | + The above copyright notice and this permission notice shall be included in |
| | 20 | + all copies or substantial portions of the Software. |
| | 21 | + |
| | 22 | + THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| | 23 | + IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| | 24 | + FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| | 25 | + AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| | 26 | + LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| | 27 | + OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| | 28 | + THE SOFTWARE. |
| | 29 | + */ |
| | 30 | + |
| | 31 | + /* |
| | 32 | + This JavaScript library is used to parse meta-data from files |
| | 33 | + with mime-type image/jpeg. |
| | 34 | + |
| | 35 | + Include it with something like: |
| | 36 | + |
| | 37 | + <script type="text/javascript" src="jpegmeta.js"></script> |
| | 38 | + |
| | 39 | + This adds a single 'module' object called 'JpegMeta' to the global |
| | 40 | + namespace. |
| | 41 | + |
| | 42 | + Public Functions |
| | 43 | + ---------------- |
| | 44 | + JpegMeta.parseNum - parse unsigned integers from binary data |
| | 45 | + JpegMeta.parseSnum - parse signed integers from binary data |
| | 46 | + |
| | 47 | + Public Classes |
| | 48 | + -------------- |
| | 49 | + JpegMeta.Rational - A rational number class |
| | 50 | + JpegMeta.JfifSegment |
| | 51 | + JpegMeta.ExifSegment |
| | 52 | + JpegMeta.JpegFile - Primary class for Javascript parsing |
| | 53 | + */ |
| | 54 | + |
| | 55 | + var JpegMeta = {}; |
| | 56 | + this.JpegMeta = JpegMeta; // I have no clue why I need this magic... -- Bryan |
| | 57 | + |
| | 58 | + /* |
| | 59 | + parse an unsigned number of size bytes at offset in some binary string data. |
| | 60 | + If endian |
| | 61 | + is "<" parse the data as little endian, if endian |
| | 62 | + is ">" parse as big-endian. |
| | 63 | + */ |
| | 64 | + JpegMeta.parseNum = function parseNum(endian, data, offset, size) { |
| | 65 | + var i; |
| | 66 | + var ret; |
| | 67 | + var big_endian = (endian === ">"); |
| | 68 | + if (offset === undefined) offset = 0; |
| | 69 | + if (size === undefined) size = data.length - offset; |
| | 70 | + for (big_endian ? i = offset : i = offset + size - 1; |
| | 71 | + big_endian ? i < offset + size : i >= offset; |
| | 72 | + big_endian ? i++ : i--) { |
| | 73 | + ret <<= 8; |
| | 74 | + ret += data.charCodeAt(i); |
| | 75 | + } |
| | 76 | + return ret; |
| | 77 | + }; |
| | 78 | + |
| | 79 | + /* |
| | 80 | + parse an signed number of size bytes at offset in some binary string data. |
| | 81 | + If endian |
| | 82 | + is "<" parse the data as little endian, if endian |
| | 83 | + is ">" parse as big-endian. |
| | 84 | + */ |
| | 85 | + JpegMeta.parseSnum = function parseSnum(endian, data, offset, size) { |
| | 86 | + var i; |
| | 87 | + var ret; |
| | 88 | + var neg; |
| | 89 | + var big_endian = (endian === ">"); |
| | 90 | + if (offset === undefined) offset = 0; |
| | 91 | + if (size === undefined) size = data.length - offset; |
| | 92 | + for (big_endian ? i = offset : i = offset + size - 1; |
| | 93 | + big_endian ? i < offset + size : i >= offset; |
| | 94 | + big_endian ? i++ : i--) { |
| | 95 | + if (neg === undefined) { |
| | 96 | + /* Negative if top bit is set */ |
| | 97 | + neg = (data.charCodeAt(i) & 0x80) === 0x80; |
| | 98 | + } |
| | 99 | + ret <<= 8; |
| | 100 | + /* If it is negative we invert the bits */ |
| | 101 | + ret += neg ? ~data.charCodeAt(i) & 0xff: data.charCodeAt(i); |
| | 102 | + } |
| | 103 | + if (neg) { |
| | 104 | + /* If it is negative we do two's complement */ |
| | 105 | + ret += 1; |
| | 106 | + ret *= -1; |
| | 107 | + } |
| | 108 | + return ret; |
| | 109 | + }; |
| | 110 | + |
| | 111 | + /* Rational number class */ |
| | 112 | + JpegMeta.Rational = function Rational(num, den) |
| | 113 | + { |
| | 114 | + this.num = num; |
| | 115 | + this.den = den || 1; |
| | 116 | + return this; |
| | 117 | + }; |
| | 118 | + |
| | 119 | + /* Rational number methods */ |
| | 120 | + JpegMeta.Rational.prototype.toString = function toString() { |
| | 121 | + if (this.num === 0) { |
| | 122 | + return "" + this.num |
| | 123 | + } |
| | 124 | + if (this.den === 1) { |
| | 125 | + return "" + this.num; |
| | 126 | + } |
| | 127 | + if (this.num === 1) { |
| | 128 | + return this.num + " / " + this.den; |
| | 129 | + } |
| | 130 | + return this.num / this.den; // + "/" + this.den; |
| | 131 | + }; |
| | 132 | + |
| | 133 | + JpegMeta.Rational.prototype.asFloat = function asFloat() { |
| | 134 | + return this.num / this.den; |
| | 135 | + }; |
| | 136 | + |
| | 137 | + /* MetaGroup class */ |
| | 138 | + JpegMeta.MetaGroup = function MetaGroup(fieldName, description) { |
| | 139 | + this.fieldName = fieldName; |
| | 140 | + this.description = description; |
| | 141 | + this.metaProps = {}; |
| | 142 | + return this; |
| | 143 | + }; |
| | 144 | + |
| | 145 | + JpegMeta.MetaGroup.prototype._addProperty = function _addProperty(fieldName, description, value) { |
| | 146 | + var property = new JpegMeta.MetaProp(fieldName, description, value); |
| | 147 | + this[property.fieldName] = property; |
| | 148 | + this.metaProps[property.fieldName] = property; |
| | 149 | + }; |
| | 150 | + |
| | 151 | + JpegMeta.MetaGroup.prototype.toString = function toString() { |
| | 152 | + return "[MetaGroup " + this.description + "]"; |
| | 153 | + }; |
| | 154 | + |
| | 155 | + /* MetaProp class */ |
| | 156 | + JpegMeta.MetaProp = function MetaProp(fieldName, description, value) { |
| | 157 | + this.fieldName = fieldName; |
| | 158 | + this.description = description; |
| | 159 | + this.value = value; |
| | 160 | + return this; |
| | 161 | + }; |
| | 162 | + |
| | 163 | + JpegMeta.MetaProp.prototype.toString = function toString() { |
| | 164 | + return "" + this.value; |
| | 165 | + }; |
| | 166 | + |
| | 167 | + /* JpegFile class */ |
| | 168 | + JpegMeta.JpegFile = function JpegFile(binary_data, filename) { |
| | 169 | + /* Change this to EOI if we want to parse. */ |
| | 170 | + var break_segment = this._SOS; |
| | 171 | + |
| | 172 | + this.metaGroups = {}; |
| | 173 | + this._binary_data = binary_data; |
| | 174 | + this.filename = filename; |
| | 175 | + |
| | 176 | + /* Go through and parse. */ |
| | 177 | + var pos = 0; |
| | 178 | + var pos_start_of_segment = 0; |
| | 179 | + var delim; |
| | 180 | + var mark; |
| | 181 | + var _mark; |
| | 182 | + var segsize; |
| | 183 | + var headersize; |
| | 184 | + var mark_code; |
| | 185 | + var mark_fn; |
| | 186 | + |
| | 187 | + /* Check to see if this looks like a JPEG file */ |
| | 188 | + if (this._binary_data.slice(0, 2) !== this._SOI_MARKER) { |
| | 189 | + throw new Error("Doesn't look like a JPEG file. First two bytes are " + |
| | 190 | + this._binary_data.charCodeAt(0) + "," + |
| | 191 | + this._binary_data.charCodeAt(1) + "."); |
| | 192 | + } |
| | 193 | + |
| | 194 | + pos += 2; |
| | 195 | + |
| | 196 | + while (pos < this._binary_data.length) { |
| | 197 | + delim = this._binary_data.charCodeAt(pos++); |
| | 198 | + mark = this._binary_data.charCodeAt(pos++); |
| | 199 | + |
| | 200 | + pos_start_of_segment = pos; |
| | 201 | + |
| | 202 | + if (delim != this._DELIM) { |
| | 203 | + break; |
| | 204 | + } |
| | 205 | + |
| | 206 | + if (mark === break_segment) { |
| | 207 | + break; |
| | 208 | + } |
| | 209 | + |
| | 210 | + headersize = JpegMeta.parseNum(">", this._binary_data, pos, 2); |
| | 211 | + |
| | 212 | + /* Find the end */ |
| | 213 | + pos += headersize; |
| | 214 | + while (pos < this._binary_data.length) { |
| | 215 | + delim = this._binary_data.charCodeAt(pos++); |
| | 216 | + if (delim == this._DELIM) { |
| | 217 | + _mark = this._binary_data.charCodeAt(pos++); |
| | 218 | + if (_mark != 0x0) { |
| | 219 | + pos -= 2; |
| | 220 | + break; |
| | 221 | + } |
| | 222 | + } |
| | 223 | + } |
| | 224 | + |
| | 225 | + segsize = pos - pos_start_of_segment; |
| | 226 | + |
| | 227 | + if (this._markers[mark]) { |
| | 228 | + mark_code = this._markers[mark][0]; |
| | 229 | + mark_fn = this._markers[mark][1]; |
| | 230 | + } else { |
| | 231 | + mark_code = "UNKN"; |
| | 232 | + mark_fn = undefined; |
| | 233 | + } |
| | 234 | + |
| | 235 | + if (mark_fn) { |
| | 236 | + this[mark_fn](mark, pos_start_of_segment + 2); |
| | 237 | + } |
| | 238 | + |
| | 239 | + } |
| | 240 | + |
| | 241 | + if (this.general === undefined) { |
| | 242 | + throw Error("Invalid JPEG file."); |
| | 243 | + } |
| | 244 | + |
| | 245 | + return this; |
| | 246 | + }; |
| | 247 | + |
| | 248 | + this.JpegMeta.JpegFile.prototype.toString = function () { |
| | 249 | + return "[JpegFile " + this.filename + " " + |
| | 250 | + this.general.type + " " + |
| | 251 | + this.general.pixelWidth + "x" + |
| | 252 | + this.general.pixelHeight + |
| | 253 | + " Depth: " + this.general.depth + "]"; |
| | 254 | + }; |
| | 255 | + |
| | 256 | + /* Some useful constants */ |
| | 257 | + this.JpegMeta.JpegFile.prototype._SOI_MARKER = '\xff\xd8'; |
| | 258 | + this.JpegMeta.JpegFile.prototype._DELIM = 0xff; |
| | 259 | + this.JpegMeta.JpegFile.prototype._EOI = 0xd9; |
| | 260 | + this.JpegMeta.JpegFile.prototype._SOS = 0xda; |
| | 261 | + |
| | 262 | + this.JpegMeta.JpegFile.prototype._sofHandler = function _sofHandler (mark, pos) { |
| | 263 | + if (this.general !== undefined) { |
| | 264 | + throw Error("Unexpected multiple-frame image"); |
| | 265 | + } |
| | 266 | + |
| | 267 | + this._addMetaGroup("general", "General"); |
| | 268 | + this.general._addProperty("depth", "Depth", JpegMeta.parseNum(">", this._binary_data, pos, 1)); |
| | 269 | + this.general._addProperty("pixelHeight", "Pixel Height", JpegMeta.parseNum(">", this._binary_data, pos + 1, 2)); |
| | 270 | + this.general._addProperty("pixelWidth", "Pixel Width",JpegMeta.parseNum(">", this._binary_data, pos + 3, 2)); |
| | 271 | + this.general._addProperty("type", "Type", this._markers[mark][2]); |
| | 272 | + }; |
| | 273 | + |
| | 274 | + /* JFIF idents */ |
| | 275 | + this.JpegMeta.JpegFile.prototype._JFIF_IDENT = "JFIF\x00"; |
| | 276 | + this.JpegMeta.JpegFile.prototype._JFXX_IDENT = "JFXX\x00"; |
| | 277 | + |
| | 278 | + /* EXIF idents */ |
| | 279 | + this.JpegMeta.JpegFile.prototype._EXIF_IDENT = "Exif\x00"; |
| | 280 | + |
| | 281 | + /* TIFF types */ |
| | 282 | + this.JpegMeta.JpegFile.prototype._types = { |
| | 283 | + /* The format is identifier : ["type name", type_size_in_bytes ] */ |
| | 284 | + 1 : ["BYTE", 1], |
| | 285 | + 2 : ["ASCII", 1], |
| | 286 | + 3 : ["SHORT", 2], |
| | 287 | + 4 : ["LONG", 4], |
| | 288 | + 5 : ["RATIONAL", 8], |
| | 289 | + 6 : ["SBYTE", 1], |
| | 290 | + 7 : ["UNDEFINED", 1], |
| | 291 | + 8 : ["SSHORT", 2], |
| | 292 | + 9 : ["SLONG", 4], |
| | 293 | + 10 : ["SRATIONAL", 8], |
| | 294 | + 11 : ["FLOAT", 4], |
| | 295 | + 12 : ["DOUBLE", 8], |
| | 296 | + }; |
| | 297 | + |
| | 298 | + this.JpegMeta.JpegFile.prototype._tifftags = { |
| | 299 | + /* A. Tags relating to image data structure */ |
| | 300 | + 256 : ["Image width", "ImageWidth"], |
| | 301 | + 257 : ["Image height", "ImageLength"], |
| | 302 | + 258 : ["Number of bits per component", "BitsPerSample"], |
| | 303 | + 259 : ["Compression scheme", "Compression", |
| | 304 | + {1 : "uncompressed", 6 : "JPEG compression" }], |
| | 305 | + 262 : ["Pixel composition", "PhotmetricInerpretation", |
| | 306 | + {2 : "RGB", 6 : "YCbCr"}], |
| | 307 | + 274 : ["Orientation of image", "Orientation", |
| | 308 | + /* FIXME: Check the mirror-image / reverse encoding and rotation */ |
| | 309 | + {1 : "Normal", 2 : "Reverse?", |
| | 310 | + 3 : "Upside-down", 4 : "Upside-down Reverse", |
| | 311 | + 5 : "90 degree CW", 6 : "90 degree CW reverse", |
| | 312 | + 7 : "90 degree CCW", 8 : "90 degree CCW reverse",}], |
| | 313 | + 277 : ["Number of components", "SamplesPerPixel"], |
| | 314 | + 284 : ["Image data arrangement", "PlanarConfiguration", |
| | 315 | + {1 : "chunky format", 2 : "planar format"}], |
| | 316 | + 530 : ["Subsampling ratio of Y to C", "YCbCrSubSampling"], |
| | 317 | + 531 : ["Y and C positioning", "YCbCrPositioning", |
| | 318 | + {1 : "centered", 2 : "co-sited"}], |
| | 319 | + 282 : ["X Resolution", "XResolution"], |
| | 320 | + 283 : ["Y Resolution", "YResolution"], |
| | 321 | + 296 : ["Resolution Unit", "ResolutionUnit", |
| | 322 | + {2 : "inches", 3 : "centimeters"}], |
| | 323 | + /* B. Tags realting to recording offset */ |
| | 324 | + 273 : ["Image data location", "StripOffsets"], |
| | 325 | + 278 : ["Number of rows per strip", "RowsPerStrip"], |
| | 326 | + 279 : ["Bytes per compressed strip", "StripByteCounts"], |
| | 327 | + 513 : ["Offset to JPEG SOI", "JPEGInterchangeFormat"], |
| | 328 | + 514 : ["Bytes of JPEG Data", "JPEGInterchangeFormatLength"], |
| | 329 | + /* C. Tags relating to image data characteristics */ |
| | 330 | + 301 : ["Transfer function", "TransferFunction"], |
| | 331 | + 318 : ["White point chromaticity", "WhitePoint"], |
| | 332 | + 319 : ["Chromaticities of primaries", "PrimaryChromaticities"], |
| | 333 | + 529 : ["Color space transformation matrix coefficients", "YCbCrCoefficients"], |
| | 334 | + 532 : ["Pair of black and white reference values", "ReferenceBlackWhite"], |
| | 335 | + /* D. Other tags */ |
| | 336 | + 306 : ["Date and time", "DateTime"], |
| | 337 | + 270 : ["Image title", "ImageDescription"], |
| | 338 | + 271 : ["Make", "Make"], |
| | 339 | + 272 : ["Model", "Model"], |
| | 340 | + 305 : ["Software", "Software"], |
| | 341 | + 315 : ["Person who created the image", "Artist"], |
| | 342 | + 316 : ["Host Computer", "HostComputer"], |
| | 343 | + 33432 : ["Copyright holder", "Copyright"], |
| | 344 | + |
| | 345 | + 34665 : ["Exif tag", "ExifIfdPointer"], |
| | 346 | + 34853 : ["GPS tag", "GPSInfoIfdPointer"], |
| | 347 | + }; |
| | 348 | + |
| | 349 | + this.JpegMeta.JpegFile.prototype._exiftags = { |
| | 350 | + /* Tag Support Levels (2) - 0th IFX Exif Private Tags */ |
| | 351 | + /* A. Tags Relating to Version */ |
| | 352 | + 36864 : ["Exif Version", "ExifVersion"], |
| | 353 | + 40960 : ["FlashPix Version", "FlashpixVersion"], |
| | 354 | + |
| | 355 | + /* B. Tag Relating to Image Data Characteristics */ |
| | 356 | + 40961 : ["Color Space", "ColorSpace"], |
| | 357 | + |
| | 358 | + /* C. Tags Relating to Image Configuration */ |
| | 359 | + 37121 : ["Meaning of each component", "ComponentsConfiguration"], |
| | 360 | + 37122 : ["Compressed Bits Per Pixel", "CompressedBitsPerPixel"], |
| | 361 | + 40962 : ["Pixel X Dimension", "PixelXDimension"], |
| | 362 | + 40963 : ["Pixel Y Dimension", "PixelYDimension"], |
| | 363 | + |
| | 364 | + /* D. Tags Relating to User Information */ |
| | 365 | + 37500 : ["Manufacturer notes", "MakerNote"], |
| | 366 | + 37510 : ["User comments", "UserComment"], |
| | 367 | + |
| | 368 | + /* E. Tag Relating to Related File Information */ |
| | 369 | + 40964 : ["Related audio file", "RelatedSoundFile"], |
| | 370 | + |
| | 371 | + /* F. Tags Relating to Date and Time */ |
| | 372 | + 36867 : ["Date Time Original", "DateTimeOriginal"], |
| | 373 | + 36868 : ["Date Time Digitized", "DateTimeDigitized"], |
| | 374 | + 37520 : ["DateTime subseconds", "SubSecTime"], |
| | 375 | + 37521 : ["DateTimeOriginal subseconds", "SubSecTimeOriginal"], |
| | 376 | + 37522 : ["DateTimeDigitized subseconds", "SubSecTimeDigitized"], |
| | 377 | + |
| | 378 | + /* G. Tags Relating to Picture-Taking Conditions */ |
| | 379 | + 33434 : ["Exposure time", "ExposureTime"], |
| | 380 | + 33437 : ["FNumber", "FNumber"], |
| | 381 | + 34850 : ["Exposure program", "ExposureProgram"], |
| | 382 | + 34852 : ["Spectral sensitivity", "SpectralSensitivity"], |
| | 383 | + 34855 : ["ISO Speed Ratings", "ISOSpeedRatings"], |
| | 384 | + 34856 : ["Optoelectric coefficient", "OECF"], |
| | 385 | + 37377 : ["Shutter Speed", "ShutterSpeedValue"], |
| | 386 | + 37378 : ["Aperture Value", "ApertureValue"], |
| | 387 | + 37379 : ["Brightness", "BrightnessValue"], |
| | 388 | + 37380 : ["Exposure Bias Value", "ExposureBiasValue"], |
| | 389 | + 37381 : ["Max Aperture Value", "MaxApertureValue"], |
| | 390 | + 37382 : ["Subject Distance", "SubjectDistance"], |
| | 391 | + 37383 : ["Metering Mode", "MeteringMode"], |
| | 392 | + 37384 : ["Light Source", "LightSource"], |
| | 393 | + 37385 : ["Flash", "Flash"], |
| | 394 | + 37386 : ["Focal Length", "FocalLength"], |
| | 395 | + 37396 : ["Subject Area", "SubjectArea"], |
| | 396 | + 41483 : ["Flash Energy", "FlashEnergy"], |
| | 397 | + 41484 : ["Spatial Frequency Response", "SpatialFrequencyResponse"], |
| | 398 | + 41486 : ["Focal Plane X Resolution", "FocalPlaneXResolution"], |
| | 399 | + 41487 : ["Focal Plane Y Resolution", "FocalPlaneYResolution"], |
| | 400 | + 41488 : ["Focal Plane Resolution Unit", "FocalPlaneResolutionUnit"], |
| | 401 | + 41492 : ["Subject Location", "SubjectLocation"], |
| | 402 | + 41493 : ["Exposure Index", "ExposureIndex"], |
| | 403 | + 41495 : ["Sensing Method", "SensingMethod"], |
| | 404 | + 41728 : ["File Source", "FileSource"], |
| | 405 | + 41729 : ["Scene Type", "SceneType"], |
| | 406 | + 41730 : ["CFA Pattern", "CFAPattern"], |
| | 407 | + 41985 : ["Custom Rendered", "CustomRendered"], |
| | 408 | + 41986 : ["Exposure Mode", "Exposure Mode"], |
| | 409 | + 41987 : ["White Balance", "WhiteBalance"], |
| | 410 | + 41988 : ["Digital Zoom Ratio", "DigitalZoomRatio"], |
| | 411 | + 41990 : ["Scene Capture Type", "SceneCaptureType"], |
| | 412 | + 41991 : ["Gain Control", "GainControl"], |
| | 413 | + 41992 : ["Contrast", "Contrast"], |
| | 414 | + 41993 : ["Saturation", "Saturation"], |
| | 415 | + 41994 : ["Sharpness", "Sharpness"], |
| | 416 | + 41995 : ["Device settings description", "DeviceSettingDescription"], |
| | 417 | + 41996 : ["Subject distance range", "SubjectDistanceRange"], |
| | 418 | + |
| | 419 | + /* H. Other Tags */ |
| | 420 | + 42016 : ["Unique image ID", "ImageUniqueID"], |
| | 421 | + |
| | 422 | + 40965 : ["Interoperability tag", "InteroperabilityIFDPointer"], |
| | 423 | + }; |
| | 424 | + |
| | 425 | + this.JpegMeta.JpegFile.prototype._gpstags = { |
| | 426 | + /* A. Tags Relating to GPS */ |
| | 427 | + 0 : ["GPS tag version", "GPSVersionID"], |
| | 428 | + 1 : ["North or South Latitude", "GPSLatitudeRef"], |
| | 429 | + 2 : ["Latitude", "GPSLatitude"], |
| | 430 | + 3 : ["East or West Longitude", "GPSLongitudeRef"], |
| | 431 | + 4 : ["Longitude", "GPSLongitude"], |
| | 432 | + 5 : ["Altitude reference", "GPSAltitudeRef"], |
| | 433 | + 6 : ["Altitude", "GPSAltitude"], |
| | 434 | + 7 : ["GPS time (atomic clock)", "GPSTimeStamp"], |
| | 435 | + 8 : ["GPS satellites usedd for measurement", "GPSSatellites"], |
| | 436 | + 9 : ["GPS receiver status", "GPSStatus"], |
| | 437 | + 10 : ["GPS mesaurement mode", "GPSMeasureMode"], |
| | 438 | + 11 : ["Measurement precision", "GPSDOP"], |
| | 439 | + 12 : ["Speed unit", "GPSSpeedRef"], |
| | 440 | + 13 : ["Speed of GPS receiver", "GPSSpeed"], |
| | 441 | + 14 : ["Reference for direction of movement", "GPSTrackRef"], |
| | 442 | + 15 : ["Direction of movement", "GPSTrack"], |
| | 443 | + 16 : ["Reference for direction of image", "GPSImgDirectionRef"], |
| | 444 | + 17 : ["Direction of image", "GPSImgDirection"], |
| | 445 | + 18 : ["Geodetic survey data used", "GPSMapDatum"], |
| | 446 | + 19 : ["Reference for latitude of destination", "GPSDestLatitudeRef"], |
| | 447 | + 20 : ["Latitude of destination", "GPSDestLatitude"], |
| | 448 | + 21 : ["Reference for longitude of destination", "GPSDestLongitudeRef"], |
| | 449 | + 22 : ["Longitude of destination", "GPSDestLongitude"], |
| | 450 | + 23 : ["Reference for bearing of destination", "GPSDestBearingRef"], |
| | 451 | + 24 : ["Bearing of destination", "GPSDestBearing"], |
| | 452 | + 25 : ["Reference for distance to destination", "GPSDestDistanceRef"], |
| | 453 | + 26 : ["Distance to destination", "GPSDestDistance"], |
| | 454 | + 27 : ["Name of GPS processing method", "GPSProcessingMethod"], |
| | 455 | + 28 : ["Name of GPS area", "GPSAreaInformation"], |
| | 456 | + 29 : ["GPS Date", "GPSDateStamp"], |
| | 457 | + 30 : ["GPS differential correction", "GPSDifferential"], |
| | 458 | + }; |
| | 459 | + |
| | 460 | + this.JpegMeta.JpegFile.prototype._markers = { |
| | 461 | + /* Start Of Frame markers, non-differential, Huffman coding */ |
| | 462 | + 0xc0: ["SOF0", "_sofHandler", "Baseline DCT"], |
| | 463 | + 0xc1: ["SOF1", "_sofHandler", "Extended sequential DCT"], |
| | 464 | + 0xc2: ["SOF2", "_sofHandler", "Progressive DCT"], |
| | 465 | + 0xc3: ["SOF3", "_sofHandler", "Lossless (sequential)"], |
| | 466 | + |
| | 467 | + /* Start Of Frame markers, differential, Huffman coding */ |
| | 468 | + 0xc5: ["SOF5", "_sofHandler", "Differential sequential DCT"], |
| | 469 | + 0xc6: ["SOF6", "_sofHandler", "Differential progressive DCT"], |
| | 470 | + 0xc7: ["SOF7", "_sofHandler", "Differential lossless (sequential)"], |
| | 471 | + |
| | 472 | + /* Start Of Frame markers, non-differential, arithmetic coding */ |
| | 473 | + 0xc8: ["JPG", null, "Reserved for JPEG extensions"], |
| | 474 | + 0xc9: ["SOF9", "_sofHandler", "Extended sequential DCT"], |
| | 475 | + 0xca: ["SOF10", "_sofHandler", "Progressive DCT"], |
| | 476 | + 0xcb: ["SOF11", "_sofHandler", "Lossless (sequential)"], |
| | 477 | + |
| | 478 | + /* Start Of Frame markers, differential, arithmetic coding */ |
| | 479 | + 0xcd: ["SOF13", "_sofHandler", "Differential sequential DCT"], |
| | 480 | + 0xce: ["SOF14", "_sofHandler", "Differential progressive DCT"], |
| | 481 | + 0xcf: ["SOF15", "_sofHandler", "Differential lossless (sequential)"], |
| | 482 | + |
| | 483 | + /* Huffman table specification */ |
| | 484 | + 0xc4: ["DHT", null, "Define Huffman table(s)"], |
| | 485 | + 0xcc: ["DAC", null, "Define arithmetic coding conditioning(s)"], |
| | 486 | + |
| | 487 | + /* Restart interval termination" */ |
| | 488 | + 0xd0: ["RST0", null, "Restart with modulo 8 count “0”"], |
| | 489 | + 0xd1: ["RST1", null, "Restart with modulo 8 count “1”"], |
| | 490 | + 0xd2: ["RST2", null, "Restart with modulo 8 count “2”"], |
| | 491 | + 0xd3: ["RST3", null, "Restart with modulo 8 count “3”"], |
| | 492 | + 0xd4: ["RST4", null, "Restart with modulo 8 count “4”"], |
| | 493 | + 0xd5: ["RST5", null, "Restart with modulo 8 count “5”"], |
| | 494 | + 0xd6: ["RST6", null, "Restart with modulo 8 count “6”"], |
| | 495 | + 0xd7: ["RST7", null, "Restart with modulo 8 count “7”"], |
| | 496 | + |
| | 497 | + /* Other markers */ |
| | 498 | + 0xd8: ["SOI", null, "Start of image"], |
| | 499 | + 0xd9: ["EOI", null, "End of image"], |
| | 500 | + 0xda: ["SOS", null, "Start of scan"], |
| | 501 | + 0xdb: ["DQT", null, "Define quantization table(s)"], |
| | 502 | + 0xdc: ["DNL", null, "Define number of lines"], |
| | 503 | + 0xdd: ["DRI", null, "Define restart interval"], |
| | 504 | + 0xde: ["DHP", null, "Define hierarchical progression"], |
| | 505 | + 0xdf: ["EXP", null, "Expand reference component(s)"], |
| | 506 | + 0xe0: ["APP0", "_app0Handler", "Reserved for application segments"], |
| | 507 | + 0xe1: ["APP1", "_app1Handler"], |
| | 508 | + 0xe2: ["APP2", null], |
| | 509 | + 0xe3: ["APP3", null], |
| | 510 | + 0xe4: ["APP4", null], |
| | 511 | + 0xe5: ["APP5", null], |
| | 512 | + 0xe6: ["APP6", null], |
| | 513 | + 0xe7: ["APP7", null], |
| | 514 | + 0xe8: ["APP8", null], |
| | 515 | + 0xe9: ["APP9", null], |
| | 516 | + 0xea: ["APP10", null], |
| | 517 | + 0xeb: ["APP11", null], |
| | 518 | + 0xec: ["APP12", null], |
| | 519 | + 0xed: ["APP13", null], |
| | 520 | + 0xee: ["APP14", null], |
| | 521 | + 0xef: ["APP15", null], |
| | 522 | + 0xf0: ["JPG0", null], /* Reserved for JPEG extensions */ |
| | 523 | + 0xf1: ["JPG1", null], |
| | 524 | + 0xf2: ["JPG2", null], |
| | 525 | + 0xf3: ["JPG3", null], |
| | 526 | + 0xf4: ["JPG4", null], |
| | 527 | + 0xf5: ["JPG5", null], |
| | 528 | + 0xf6: ["JPG6", null], |
| | 529 | + 0xf7: ["JPG7", null], |
| | 530 | + 0xf8: ["JPG8", null], |
| | 531 | + 0xf9: ["JPG9", null], |
| | 532 | + 0xfa: ["JPG10", null], |
| | 533 | + 0xfb: ["JPG11", null], |
| | 534 | + 0xfc: ["JPG12", null], |
| | 535 | + 0xfd: ["JPG13", null], |
| | 536 | + 0xfe: ["COM", null], /* Comment */ |
| | 537 | + |
| | 538 | + /* Reserved markers */ |
| | 539 | + 0x01: ["JPG13", null], /* For temporary private use in arithmetic coding */ |
| | 540 | + /* 02 -> bf are reserverd */ |
| | 541 | + }; |
| | 542 | + |
| | 543 | + /* Private methods */ |
| | 544 | + this.JpegMeta.JpegFile.prototype._addMetaGroup = function _addMetaGroup(name, description) { |
| | 545 | + var group = new JpegMeta.MetaGroup(name, description); |
| | 546 | + this[group.fieldName] = group; |
| | 547 | + this.metaGroups[group.fieldName] = group; |
| | 548 | + return group; |
| | 549 | + }; |
| | 550 | + |
| | 551 | + this.JpegMeta.JpegFile.prototype._parseIfd = function _parseIfd(endian, _binary_data, base, ifd_offset, tags, name, description) { |
| | 552 | + var num_fields = JpegMeta.parseNum(endian, _binary_data, base + ifd_offset, 2); |
| | 553 | + /* Per tag variables */ |
| | 554 | + var i, j; |
| | 555 | + var tag_base; |
| | 556 | + var tag_field; |
| | 557 | + var type, type_field, type_size; |
| | 558 | + var num_values; |
| | 559 | + var value_offset; |
| | 560 | + var value; |
| | 561 | + var _val; |
| | 562 | + var num; |
| | 563 | + var den; |
| | 564 | + |
| | 565 | + var group; |
| | 566 | + |
| | 567 | + group = this._addMetaGroup(name, description); |
| | 568 | + |
| | 569 | + for (var i = 0; i < num_fields; i++) { |
| | 570 | + /* parse the field */ |
| | 571 | + tag_base = base + ifd_offset + 2 + (i * 12); |
| | 572 | + tag_field = JpegMeta.parseNum(endian, _binary_data, tag_base, 2); |
| | 573 | + type_field = JpegMeta.parseNum(endian, _binary_data, tag_base + 2, 2); |
| | 574 | + num_values = JpegMeta.parseNum(endian, _binary_data, tag_base + 4, 4); |
| | 575 | + value_offset = JpegMeta.parseNum(endian, _binary_data, tag_base + 8, 4); |
| | 576 | + if (this._types[type_field] === undefined) { |
| | 577 | + continue; |
| | 578 | + } |
| | 579 | + type = this._types[type_field][0]; |
| | 580 | + type_size = this._types[type_field][1]; |
| | 581 | + |
| | 582 | + if (type_size * num_values <= 4) { |
| | 583 | + /* Data is in-line */ |
| | 584 | + value_offset = tag_base + 8; |
| | 585 | + } else { |
| | 586 | + value_offset = base + value_offset; |
| | 587 | + } |
| | 588 | + |
| | 589 | + /* Read the value */ |
| | 590 | + if (type == "UNDEFINED") { |
| | 591 | + value = _binary_data.slice(value_offset, value_offset + num_values); |
| | 592 | + } else if (type == "ASCII") { |
| | 593 | + value = _binary_data.slice(value_offset, value_offset + num_values); |
| | 594 | + value = value.split('\x00')[0]; |
| | 595 | + /* strip trail nul */ |
| | 596 | + } else { |
| | 597 | + value = new Array(); |
| | 598 | + for (j = 0; j < num_values; j++, value_offset += type_size) { |
| | 599 | + if (type == "BYTE" || type == "SHORT" || type == "LONG") { |
| | 600 | + value.push(JpegMeta.parseNum(endian, _binary_data, value_offset, type_size)); |
| | 601 | + } |
| | 602 | + if (type == "SBYTE" || type == "SSHORT" || type == "SLONG") { |
| | 603 | + value.push(JpegMeta.parseSnum(endian, _binary_data, value_offset, type_size)); |
| | 604 | + } |
| | 605 | + if (type == "RATIONAL") { |
| | 606 | + num = JpegMeta.parseNum(endian, _binary_data, value_offset, 4); |
| | 607 | + den = JpegMeta.parseNum(endian, _binary_data, value_offset + 4, 4); |
| | 608 | + value.push(new JpegMeta.Rational(num, den)); |
| | 609 | + } |
| | 610 | + if (type == "SRATIONAL") { |
| | 611 | + num = JpegMeta.parseSnum(endian, _binary_data, value_offset, 4); |
| | 612 | + den = JpegMeta.parseSnum(endian, _binary_data, value_offset + 4, 4); |
| | 613 | + value.push(new JpegMeta.Rational(num, den)); |
| | 614 | + } |
| | 615 | + value.push(); |
| | 616 | + } |
| | 617 | + if (num_values === 1) { |
| | 618 | + value = value[0]; |
| | 619 | + } |
| | 620 | + } |
| | 621 | + if (tags[tag_field] !== undefined) { |
| | 622 | + group._addProperty(tags[tag_field][1], tags[tag_field][0], value); |
| | 623 | + } |
| | 624 | + } |
| | 625 | + }; |
| | 626 | + |
| | 627 | + this.JpegMeta.JpegFile.prototype._jfifHandler = function _jfifHandler(mark, pos) { |
| | 628 | + if (this.jfif !== undefined) { |
| | 629 | + throw Error("Multiple JFIF segments found"); |
| | 630 | + } |
| | 631 | + this._addMetaGroup("jfif", "JFIF"); |
| | 632 | + this.jfif._addProperty("version_major", "Version Major", this._binary_data.charCodeAt(pos + 5)); |
| | 633 | + this.jfif._addProperty("version_minor", "Version Minor", this._binary_data.charCodeAt(pos + 6)); |
| | 634 | + this.jfif._addProperty("version", "JFIF Version", this.jfif.version_major.value + "." + this.jfif.version_minor.value); |
| | 635 | + this.jfif._addProperty("units", "Density Unit", this._binary_data.charCodeAt(pos + 7)); |
| | 636 | + this.jfif._addProperty("Xdensity", "X density", JpegMeta.parseNum(">", this._binary_data, pos + 8, 2)); |
| | 637 | + this.jfif._addProperty("Ydensity", "Y Density", JpegMeta.parseNum(">", this._binary_data, pos + 10, 2)); |
| | 638 | + this.jfif._addProperty("Xthumbnail", "X Thumbnail", JpegMeta.parseNum(">", this._binary_data, pos + 12, 1)); |
| | 639 | + this.jfif._addProperty("Ythumbnail", "Y Thumbnail", JpegMeta.parseNum(">", this._binary_data, pos + 13, 1)); |
| | 640 | + }; |
| | 641 | + |
| | 642 | + /* Handle app0 segments */ |
| | 643 | + this.JpegMeta.JpegFile.prototype._app0Handler = function app0Handler(mark, pos) { |
| | 644 | + var ident = this._binary_data.slice(pos, pos + 5); |
| | 645 | + if (ident == this._JFIF_IDENT) { |
| | 646 | + this._jfifHandler(mark, pos); |
| | 647 | + } else if (ident == this._JFXX_IDENT) { |
| | 648 | + /* Don't handle JFXX Ident yet */ |
| | 649 | + } else { |
| | 650 | + /* Don't know about other idents */ |
| | 651 | + } |
| | 652 | + }; |
| | 653 | + |
| | 654 | + /* Handle app1 segments */ |
| | 655 | + this.JpegMeta.JpegFile.prototype._app1Handler = function _app1Handler(mark, pos) { |
| | 656 | + var ident = this._binary_data.slice(pos, pos + 5); |
| | 657 | + if (ident == this._EXIF_IDENT) { |
| | 658 | + this._exifHandler(mark, pos + 6); |
| | 659 | + } else { |
| | 660 | + /* Don't know about other idents */ |
| | 661 | + } |
| | 662 | + }; |
| | 663 | + |
| | 664 | + /* Handle exif segments */ |
| | 665 | + JpegMeta.JpegFile.prototype._exifHandler = function _exifHandler(mark, pos) { |
| | 666 | + if (this.exif !== undefined) { |
| | 667 | + throw new Error("Multiple JFIF segments found"); |
| | 668 | + } |
| | 669 | + |
| | 670 | + /* Parse this TIFF header */ |
| | 671 | + var endian; |
| | 672 | + var magic_field; |
| | 673 | + var ifd_offset; |
| | 674 | + var primary_ifd, exif_ifd, gps_ifd; |
| | 675 | + var endian_field = this._binary_data.slice(pos, pos + 2); |
| | 676 | + |
| | 677 | + /* Trivia: This 'I' is for Intel, the 'M' is for Motorola */ |
| | 678 | + if (endian_field === "II") { |
| | 679 | + endian = "<"; |
| | 680 | + } else if (endian_field === "MM") { |
| | 681 | + endian = ">"; |
| | 682 | + } else { |
| | 683 | + throw new Error("Malformed TIFF meta-data. Unknown endianess: " + endian_field); |
| | 684 | + } |
| | 685 | + |
| | 686 | + magic_field = JpegMeta.parseNum(endian, this._binary_data, pos + 2, 2); |
| | 687 | + |
| | 688 | + if (magic_field !== 42) { |
| | 689 | + throw new Error("Malformed TIFF meta-data. Bad magic: " + magic_field); |
| | 690 | + } |
| | 691 | + |
| | 692 | + ifd_offset = JpegMeta.parseNum(endian, this._binary_data, pos + 4, 4); |
| | 693 | + |
| | 694 | + /* Parse 0th IFD */ |
| | 695 | + this._parseIfd(endian, this._binary_data, pos, ifd_offset, this._tifftags, "tiff", "TIFF"); |
| | 696 | + |
| | 697 | + if (this.tiff.ExifIfdPointer) { |
| | 698 | + this._parseIfd(endian, this._binary_data, pos, this.tiff.ExifIfdPointer.value, this._exiftags, "exif", "Exif"); |
| | 699 | + } |
| | 700 | + |
| | 701 | + if (this.tiff.GPSInfoIfdPointer) { |
| | 702 | + this._parseIfd(endian, this._binary_data, pos, this.tiff.GPSInfoIfdPointer.value, this._gpstags, "gps", "GPS"); |
| | 703 | + if (this.gps.GPSLatitude) { |
| | 704 | + var latitude; |
| | 705 | + latitude = this.gps.GPSLatitude.value[0].asFloat() + |
| | 706 | + (1 / 60) * this.gps.GPSLatitude.value[1].asFloat() + |
| | 707 | + (1 / 3600) * this.gps.GPSLatitude.value[2].asFloat(); |
| | 708 | + if (this.gps.GPSLatitudeRef.value === "S") { |
| | 709 | + latitude = -latitude; |
| | 710 | + } |
| | 711 | + this.gps._addProperty("latitude", "Dec. Latitude", latitude); |
| | 712 | + } |
| | 713 | + if (this.gps.GPSLongitude) { |
| | 714 | + var longitude; |
| | 715 | + longitude = this.gps.GPSLongitude.value[0].asFloat() + |
| | 716 | + (1 / 60) * this.gps.GPSLongitude.value[1].asFloat() + |
| | 717 | + (1 / 3600) * this.gps.GPSLongitude.value[2].asFloat(); |
| | 718 | + if (this.gps.GPSLongitudeRef.value === "W") { |
| | 719 | + longitude = -longitude; |
| | 720 | + } |
| | 721 | + this.gps._addProperty("longitude", "Dec. Longitude", longitude); |
| | 722 | + } |
| | 723 | + } |
| | 724 | + }; |
| | 725 | + |
| | 726 | + /* JsJpegMeta ends here */ |
| | 727 | + |
| | 728 | + mw.libs.jpegmeta = function( fileReaderResult, fileName ) { |
| | 729 | + return new JpegMeta.JpegFile( fileReaderResult, fileName ); |
| | 730 | + }; |
| | 731 | + |
| | 732 | +} )( jQuery ); |
| \ No newline at end of file |
| Property changes on: trunk/phase3/resources/mediawiki.libs/mediawiki.libs.jpegmeta.js |
| ___________________________________________________________________ |
| Added: svn:eol-style |
| 1 | 733 | + native |