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[SPIP] ~maj v3.2.9-->v3.2.11
[lhc/web/www.git] / www / plugins-dist / medias / lib / getid3 / module.graphic.tiff.php
1 <?php
2
3 /////////////////////////////////////////////////////////////////
4 /// getID3() by James Heinrich <info@getid3.org> //
5 // available at https://github.com/JamesHeinrich/getID3 //
6 // or https://www.getid3.org //
7 // or http://getid3.sourceforge.net //
8 // see readme.txt for more details //
9 /////////////////////////////////////////////////////////////////
10 // //
11 // module.archive.tiff.php //
12 // module for analyzing TIFF files //
13 // dependencies: NONE //
14 // ///
15 /////////////////////////////////////////////////////////////////
16
17 if (!defined('GETID3_INCLUDEPATH')) { // prevent path-exposing attacks that access modules directly on public webservers
18 exit;
19 }
20
21 class getid3_tiff extends getid3_handler
22 {
23 /**
24 * @return bool
25 */
26 public function Analyze() {
27 $info = &$this->getid3->info;
28
29 $this->fseek($info['avdataoffset']);
30 $TIFFheader = $this->fread(4);
31
32 switch (substr($TIFFheader, 0, 2)) {
33 case 'II':
34 $info['tiff']['byte_order'] = 'Intel';
35 break;
36 case 'MM':
37 $info['tiff']['byte_order'] = 'Motorola';
38 break;
39 default:
40 $this->error('Invalid TIFF byte order identifier ('.substr($TIFFheader, 0, 2).') at offset '.$info['avdataoffset']);
41 return false;
42 }
43
44 $info['fileformat'] = 'tiff';
45 $info['video']['dataformat'] = 'tiff';
46 $info['video']['lossless'] = true;
47 $info['tiff']['ifd'] = array();
48 $CurrentIFD = array();
49
50 $FieldTypeByteLength = array(1=>1, 2=>1, 3=>2, 4=>4, 5=>8);
51
52 $nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
53
54 while ($nextIFDoffset > 0) {
55
56 $CurrentIFD['offset'] = $nextIFDoffset;
57
58 $this->fseek($info['avdataoffset'] + $nextIFDoffset);
59 $CurrentIFD['fieldcount'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
60
61 for ($i = 0; $i < $CurrentIFD['fieldcount']; $i++) {
62 $CurrentIFD['fields'][$i]['raw']['tag'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
63 $CurrentIFD['fields'][$i]['raw']['type'] = $this->TIFFendian2Int($this->fread(2), $info['tiff']['byte_order']);
64 $CurrentIFD['fields'][$i]['raw']['length'] = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
65 $CurrentIFD['fields'][$i]['raw']['valoff'] = $this->fread(4); // To save time and space the Value Offset contains the Value instead of pointing to the Value if and only if the Value fits into 4 bytes. If the Value is shorter than 4 bytes, it is left-justified within the 4-byte Value Offset, i.e., stored in the lowernumbered bytes. Whether the Value fits within 4 bytes is determined by the Type and Count of the field.
66 $CurrentIFD['fields'][$i]['raw']['tag_name'] = $this->TIFFcommentName($CurrentIFD['fields'][$i]['raw']['tag']);
67
68 switch ($CurrentIFD['fields'][$i]['raw']['type']) {
69 case 1: // BYTE An 8-bit unsigned integer.
70 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
71 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['valoff'], 0, 1), $info['tiff']['byte_order']);
72 } else {
73 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['valoff'], $info['tiff']['byte_order']);
74 }
75 break;
76
77 case 2: // ASCII 8-bit bytes that store ASCII codes; the last byte must be null.
78 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
79 $CurrentIFD['fields'][$i]['value'] = substr($CurrentIFD['fields'][$i]['raw']['valoff'], 3);
80 } else {
81 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['valoff'], $info['tiff']['byte_order']);
82 }
83 break;
84
85 case 3: // SHORT A 16-bit (2-byte) unsigned integer.
86 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 2) {
87 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int(substr($CurrentIFD['fields'][$i]['raw']['valoff'], 0, 2), $info['tiff']['byte_order']);
88 } else {
89 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['valoff'], $info['tiff']['byte_order']);
90 }
91 break;
92
93 case 4: // LONG A 32-bit (4-byte) unsigned integer.
94 if ($CurrentIFD['fields'][$i]['raw']['length'] <= 4) {
95 $CurrentIFD['fields'][$i]['value'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['valoff'], $info['tiff']['byte_order']);
96 } else {
97 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['valoff'], $info['tiff']['byte_order']);
98 }
99 break;
100
101 case 5: // RATIONAL Two LONG_s: the first represents the numerator of a fraction, the second the denominator.
102 case 7: // UNDEFINED An 8-bit byte that may contain anything, depending on the definition of the field.
103 $CurrentIFD['fields'][$i]['offset'] = $this->TIFFendian2Int($CurrentIFD['fields'][$i]['raw']['valoff'], $info['tiff']['byte_order']);
104 break;
105
106 // Warning: It is possible that other TIFF field types will be added in the future. Readers should skip over fields containing an unexpected field type.
107 // In TIFF 6.0, some new field types have been defined:
108 // These new field types are also governed by the byte order (II or MM) in the TIFF header.
109 case 6: // SBYTE An 8-bit signed (twos-complement) integer.
110 case 8: // SSHORT A 16-bit (2-byte) signed (twos-complement) integer.
111 case 9: // SLONG A 32-bit (4-byte) signed (twos-complement) integer.
112 case 10: // SRATIONAL Two SLONGs: the first represents the numerator of a fraction, the second the denominator.
113 case 11: // FLOAT Single precision (4-byte) IEEE format
114 case 12: // DOUBLE Double precision (8-byte) IEEE format
115 default:
116 $this->warning('unhandled IFD field type '.$CurrentIFD['fields'][$i]['raw']['type'].' for IFD entry '.$i);
117 break;
118 }
119 }
120
121 $info['tiff']['ifd'][] = $CurrentIFD;
122 $CurrentIFD = array();
123 $nextIFDoffset = $this->TIFFendian2Int($this->fread(4), $info['tiff']['byte_order']);
124
125 }
126
127 foreach ($info['tiff']['ifd'] as $IFDid => $IFDarray) {
128 foreach ($IFDarray['fields'] as $key => $fieldarray) {
129 switch ($fieldarray['raw']['tag']) {
130 case 256: // ImageWidth
131 case 257: // ImageLength
132 case 258: // BitsPerSample
133 case 259: // Compression
134 if (!isset($fieldarray['value'])) {
135 $this->fseek($fieldarray['offset']);
136 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $this->fread($fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
137
138 }
139 break;
140
141 case 270: // ImageDescription
142 case 271: // Make
143 case 272: // Model
144 case 305: // Software
145 case 306: // DateTime
146 case 315: // Artist
147 case 316: // HostComputer
148 if (isset($fieldarray['value'])) {
149 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $fieldarray['value'];
150 } else {
151 $this->fseek($fieldarray['offset']);
152 $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'] = $this->fread($fieldarray['raw']['length'] * $FieldTypeByteLength[$fieldarray['raw']['type']]);
153
154 }
155 break;
156 case 700:
157 $XMPmagic = '<?xpacket';
158 $this->fseek($fieldarray['offset']);
159 $xmpkey = (isset($info['tiff']['XMP']) ? count($info['tiff']['XMP']) : 0);
160 $info['tiff']['XMP'][$xmpkey]['raw'] = $this->fread($fieldarray['raw']['length']);
161 if (substr($info['tiff']['XMP'][$xmpkey]['raw'], 0, strlen($XMPmagic)) != $XMPmagic) {
162 $this->warning('did not find expected XMP data at offset '.$fieldarray['offset']);
163 unset($info['tiff']['XMP'][$xmpkey]['raw']);
164 }
165 break;
166 }
167 switch ($fieldarray['raw']['tag']) {
168 case 256: // ImageWidth
169 $info['video']['resolution_x'] = $fieldarray['value'];
170 break;
171
172 case 257: // ImageLength
173 $info['video']['resolution_y'] = $fieldarray['value'];
174 break;
175
176 case 258: // BitsPerSample
177 if (isset($fieldarray['value'])) {
178 $info['video']['bits_per_sample'] = $fieldarray['value'];
179 } else {
180 $info['video']['bits_per_sample'] = 0;
181 for ($i = 0; $i < $fieldarray['raw']['length']; $i++) {
182 $info['video']['bits_per_sample'] += $this->TIFFendian2Int(substr($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'], $i * $FieldTypeByteLength[$fieldarray['raw']['type']], $FieldTypeByteLength[$fieldarray['raw']['type']]), $info['tiff']['byte_order']);
183 }
184 }
185 break;
186
187 case 259: // Compression
188 $info['video']['codec'] = $this->TIFFcompressionMethod($fieldarray['value']);
189 break;
190
191 case 270: // ImageDescription
192 case 271: // Make
193 case 272: // Model
194 case 305: // Software
195 case 306: // DateTime
196 case 315: // Artist
197 case 316: // HostComputer
198 $TIFFcommentName = strtolower($fieldarray['raw']['tag_name']);
199 if (isset($info['tiff']['comments'][$TIFFcommentName])) {
200 $info['tiff']['comments'][$TIFFcommentName][] = $info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data'];
201 } else {
202 $info['tiff']['comments'][$TIFFcommentName] = array($info['tiff']['ifd'][$IFDid]['fields'][$key]['raw']['data']);
203 }
204 break;
205
206 default:
207 break;
208 }
209 }
210 }
211
212 return true;
213 }
214
215 /**
216 * @param string $bytestring
217 * @param string $byteorder
218 *
219 * @return int|float|false
220 */
221 public function TIFFendian2Int($bytestring, $byteorder) {
222 if ($byteorder == 'Intel') {
223 return getid3_lib::LittleEndian2Int($bytestring);
224 } elseif ($byteorder == 'Motorola') {
225 return getid3_lib::BigEndian2Int($bytestring);
226 }
227 return false;
228 }
229
230 /**
231 * @param int $id
232 *
233 * @return string
234 */
235 public function TIFFcompressionMethod($id) {
236 // https://en.wikipedia.org/wiki/TIFF#TIFF_Compression_Tag
237 static $TIFFcompressionMethod = array();
238 if (empty($TIFFcompressionMethod)) {
239 $TIFFcompressionMethod = array(
240 0x0001 => 'Uncompressed',
241 0x0002 => 'Huffman',
242 0x0003 => 'CCITT T.4',
243 0x0004 => 'CCITT T.6',
244 0x0005 => 'LZW',
245 0x0006 => 'JPEG-old',
246 0x0007 => 'JPEG',
247 0x0008 => 'deflate',
248 0x0009 => 'JBIG ITU-T T.85',
249 0x000A => 'JBIG ITU-T T.43',
250 0x7FFE => 'NeXT RLE 2-bit',
251 0x8005 => 'PackBits',
252 0x8029 => 'ThunderScan RLE 4-bit',
253 0x807F => 'RasterPadding',
254 0x8080 => 'RLE-LW',
255 0x8081 => 'RLE-CT',
256 0x8082 => 'RLE-BL',
257 0x80B2 => 'deflate-PK',
258 0x80B3 => 'Kodak-DCS',
259 0x8765 => 'JBIG',
260 0x8798 => 'JPEG2000',
261 0x8799 => 'Nikon NEF',
262 0x879B => 'JBIG2',
263 );
264 }
265 return (isset($TIFFcompressionMethod[$id]) ? $TIFFcompressionMethod[$id] : 'unknown/invalid ('.$id.')');
266 }
267
268 /**
269 * @param int $id
270 *
271 * @return string
272 */
273 public function TIFFcommentName($id) {
274 // https://www.awaresystems.be/imaging/tiff/tifftags.html
275 static $TIFFcommentName = array();
276 if (empty($TIFFcommentName)) {
277 $TIFFcommentName = array(
278 254 => 'NewSubfileType',
279 255 => 'SubfileType',
280 256 => 'ImageWidth',
281 257 => 'ImageLength',
282 258 => 'BitsPerSample',
283 259 => 'Compression',
284 262 => 'PhotometricInterpretation',
285 263 => 'Threshholding',
286 264 => 'CellWidth',
287 265 => 'CellLength',
288 266 => 'FillOrder',
289 269 => 'DocumentName',
290 270 => 'ImageDescription',
291 271 => 'Make',
292 272 => 'Model',
293 273 => 'StripOffsets',
294 274 => 'Orientation',
295 277 => 'SamplesPerPixel',
296 278 => 'RowsPerStrip',
297 279 => 'StripByteCounts',
298 280 => 'MinSampleValue',
299 281 => 'MaxSampleValue',
300 282 => 'XResolution',
301 283 => 'YResolution',
302 284 => 'PlanarConfiguration',
303 285 => 'PageName',
304 286 => 'XPosition',
305 287 => 'YPosition',
306 288 => 'FreeOffsets',
307 289 => 'FreeByteCounts',
308 290 => 'GrayResponseUnit',
309 291 => 'GrayResponseCurve',
310 292 => 'T4Options',
311 293 => 'T6Options',
312 296 => 'ResolutionUnit',
313 297 => 'PageNumber',
314 301 => 'TransferFunction',
315 305 => 'Software',
316 306 => 'DateTime',
317 315 => 'Artist',
318 316 => 'HostComputer',
319 317 => 'Predictor',
320 318 => 'WhitePoint',
321 319 => 'PrimaryChromaticities',
322 320 => 'ColorMap',
323 321 => 'HalftoneHints',
324 322 => 'TileWidth',
325 323 => 'TileLength',
326 324 => 'TileOffsets',
327 325 => 'TileByteCounts',
328 326 => 'BadFaxLines',
329 327 => 'CleanFaxData',
330 328 => 'ConsecutiveBadFaxLines',
331 330 => 'SubIFDs',
332 332 => 'InkSet',
333 333 => 'InkNames',
334 334 => 'NumberOfInks',
335 336 => 'DotRange',
336 337 => 'TargetPrinter',
337 338 => 'ExtraSamples',
338 339 => 'SampleFormat',
339 340 => 'SMinSampleValue',
340 341 => 'SMaxSampleValue',
341 342 => 'TransferRange',
342 343 => 'ClipPath',
343 344 => 'XClipPathUnits',
344 345 => 'YClipPathUnits',
345 346 => 'Indexed',
346 347 => 'JPEGTables',
347 351 => 'OPIProxy',
348 400 => 'GlobalParametersIFD',
349 401 => 'ProfileType',
350 402 => 'FaxProfile',
351 403 => 'CodingMethods',
352 404 => 'VersionYear',
353 405 => 'ModeNumber',
354 433 => 'Decode',
355 434 => 'DefaultImageColor',
356 512 => 'JPEGProc',
357 513 => 'JPEGInterchangeFormat',
358 514 => 'JPEGInterchangeFormatLngth',
359 515 => 'JPEGRestartInterval',
360 517 => 'JPEGLosslessPredictors',
361 518 => 'JPEGPointTransforms',
362 519 => 'JPEGQTables',
363 520 => 'JPEGDCTables',
364 521 => 'JPEGACTables',
365 529 => 'YCbCrCoefficients',
366 530 => 'YCbCrSubSampling',
367 531 => 'YCbCrPositioning',
368 532 => 'ReferenceBlackWhite',
369 559 => 'StripRowCounts',
370 700 => 'XMP',
371
372 32781 => 'ImageID',
373 33432 => 'Copyright',
374 34732 => 'ImageLayer',
375
376 // Private Tags - https://www.awaresystems.be/imaging/tiff/tifftags/private.html
377 32932 => 'Wang Annotation', // Annotation data, as used in 'Imaging for Windows'.
378 33445 => 'MD FileTag', // Specifies the pixel data format encoding in the Molecular Dynamics GEL file format.
379 33446 => 'MD ScalePixel', // Specifies a scale factor in the Molecular Dynamics GEL file format.
380 33447 => 'MD ColorTable', // Used to specify the conversion from 16bit to 8bit in the Molecular Dynamics GEL file format.
381 33448 => 'MD LabName', // Name of the lab that scanned this file, as used in the Molecular Dynamics GEL file format.
382 33449 => 'MD SampleInfo', // Information about the sample, as used in the Molecular Dynamics GEL file format.
383 33450 => 'MD PrepDate', // Date the sample was prepared, as used in the Molecular Dynamics GEL file format.
384 33451 => 'MD PrepTime', // Time the sample was prepared, as used in the Molecular Dynamics GEL file format.
385 33452 => 'MD FileUnits', // Units for data in this file, as used in the Molecular Dynamics GEL file format.
386 33550 => 'ModelPixelScaleTag', // Used in interchangeable GeoTIFF files.
387 33723 => 'IPTC', // IPTC (International Press Telecommunications Council) metadata.
388 33918 => 'INGR Packet Data Tag', // Intergraph Application specific storage.
389 33919 => 'INGR Flag Registers', // Intergraph Application specific flags.
390 33920 => 'IrasB Transformation Matrix', // Originally part of Intergraph's GeoTIFF tags, but likely understood by IrasB only.
391 33922 => 'ModelTiepointTag', // Originally part of Intergraph's GeoTIFF tags, but now used in interchangeable GeoTIFF files.
392 34264 => 'ModelTransformationTag', // Used in interchangeable GeoTIFF files.
393 34377 => 'Photoshop', // Collection of Photoshop 'Image Resource Blocks'.
394 34665 => 'Exif IFD', // A pointer to the Exif IFD.
395 34675 => 'ICC Profile', // ICC profile data.
396 34735 => 'GeoKeyDirectoryTag', // Used in interchangeable GeoTIFF files.
397 34736 => 'GeoDoubleParamsTag', // Used in interchangeable GeoTIFF files.
398 34737 => 'GeoAsciiParamsTag', // Used in interchangeable GeoTIFF files.
399 34853 => 'GPS IFD', // A pointer to the Exif-related GPS Info IFD.
400 34908 => 'HylaFAX FaxRecvParams', // Used by HylaFAX.
401 34909 => 'HylaFAX FaxSubAddress', // Used by HylaFAX.
402 34910 => 'HylaFAX FaxRecvTime', // Used by HylaFAX.
403 37724 => 'ImageSourceData', // Used by Adobe Photoshop.
404 40965 => 'Interoperability IFD', // A pointer to the Exif-related Interoperability IFD.
405 42112 => 'GDAL_METADATA', // Used by the GDAL library, holds an XML list of name=value 'metadata' values about the image as a whole, and about specific samples.
406 42113 => 'GDAL_NODATA', // Used by the GDAL library, contains an ASCII encoded nodata or background pixel value.
407 50215 => 'Oce Scanjob Description', // Used in the Oce scanning process.
408 50216 => 'Oce Application Selector', // Used in the Oce scanning process.
409 50217 => 'Oce Identification Number', // Used in the Oce scanning process.
410 50218 => 'Oce ImageLogic Characteristics', // Used in the Oce scanning process.
411 50706 => 'DNGVersion', // Used in IFD 0 of DNG files.
412 50707 => 'DNGBackwardVersion', // Used in IFD 0 of DNG files.
413 50708 => 'UniqueCameraModel', // Used in IFD 0 of DNG files.
414 50709 => 'LocalizedCameraModel', // Used in IFD 0 of DNG files.
415 50710 => 'CFAPlaneColor', // Used in Raw IFD of DNG files.
416 50711 => 'CFALayout', // Used in Raw IFD of DNG files.
417 50712 => 'LinearizationTable', // Used in Raw IFD of DNG files.
418 50713 => 'BlackLevelRepeatDim', // Used in Raw IFD of DNG files.
419 50714 => 'BlackLevel', // Used in Raw IFD of DNG files.
420 50715 => 'BlackLevelDeltaH', // Used in Raw IFD of DNG files.
421 50716 => 'BlackLevelDeltaV', // Used in Raw IFD of DNG files.
422 50717 => 'WhiteLevel', // Used in Raw IFD of DNG files.
423 50718 => 'DefaultScale', // Used in Raw IFD of DNG files.
424 50719 => 'DefaultCropOrigin', // Used in Raw IFD of DNG files.
425 50720 => 'DefaultCropSize', // Used in Raw IFD of DNG files.
426 50721 => 'ColorMatrix1', // Used in IFD 0 of DNG files.
427 50722 => 'ColorMatrix2', // Used in IFD 0 of DNG files.
428 50723 => 'CameraCalibration1', // Used in IFD 0 of DNG files.
429 50724 => 'CameraCalibration2', // Used in IFD 0 of DNG files.
430 50725 => 'ReductionMatrix1', // Used in IFD 0 of DNG files.
431 50726 => 'ReductionMatrix2', // Used in IFD 0 of DNG files.
432 50727 => 'AnalogBalance', // Used in IFD 0 of DNG files.
433 50728 => 'AsShotNeutral', // Used in IFD 0 of DNG files.
434 50729 => 'AsShotWhiteXY', // Used in IFD 0 of DNG files.
435 50730 => 'BaselineExposure', // Used in IFD 0 of DNG files.
436 50731 => 'BaselineNoise', // Used in IFD 0 of DNG files.
437 50732 => 'BaselineSharpness', // Used in IFD 0 of DNG files.
438 50733 => 'BayerGreenSplit', // Used in Raw IFD of DNG files.
439 50734 => 'LinearResponseLimit', // Used in IFD 0 of DNG files.
440 50735 => 'CameraSerialNumber', // Used in IFD 0 of DNG files.
441 50736 => 'LensInfo', // Used in IFD 0 of DNG files.
442 50737 => 'ChromaBlurRadius', // Used in Raw IFD of DNG files.
443 50738 => 'AntiAliasStrength', // Used in Raw IFD of DNG files.
444 50740 => 'DNGPrivateData', // Used in IFD 0 of DNG files.
445 50741 => 'MakerNoteSafety', // Used in IFD 0 of DNG files.
446 50778 => 'CalibrationIlluminant1', // Used in IFD 0 of DNG files.
447 50779 => 'CalibrationIlluminant2', // Used in IFD 0 of DNG files.
448 50780 => 'BestQualityScale', // Used in Raw IFD of DNG files.
449 50784 => 'Alias Layer Metadata', // Alias Sketchbook Pro layer usage description.
450 50908 => 'TIFF_RSID', // This private tag is used in a GEOTIFF standard by DGIWG.
451 50909 => 'GEO_METADATA', // This private tag is used in a GEOTIFF standard by DGIWG.
452
453 // EXIF tags - https://www.awaresystems.be/imaging/tiff/tifftags/privateifd/exif.html
454 33434 => 'ExposureTime', // Exposure time, given in seconds.
455 33437 => 'FNumber', // The F number.
456 34850 => 'ExposureProgram', // The class of the program used by the camera to set exposure when the picture is taken.
457 34852 => 'SpectralSensitivity', // Indicates the spectral sensitivity of each channel of the camera used.
458 34855 => 'ISOSpeedRatings', // Indicates the ISO Speed and ISO Latitude of the camera or input device as specified in ISO 12232.
459 34856 => 'OECF', // Indicates the Opto-Electric Conversion Function (OECF) specified in ISO 14524.
460 36864 => 'ExifVersion', // The version of the supported Exif standard.
461 36867 => 'DateTimeOriginal', // The date and time when the original image data was generated.
462 36868 => 'DateTimeDigitized', // The date and time when the image was stored as digital data.
463 37121 => 'ComponentsConfiguration', // Specific to compressed data; specifies the channels and complements PhotometricInterpretation
464 37122 => 'CompressedBitsPerPixel', // Specific to compressed data; states the compressed bits per pixel.
465 37377 => 'ShutterSpeedValue', // Shutter speed.
466 37378 => 'ApertureValue', // The lens aperture.
467 37379 => 'BrightnessValue', // The value of brightness.
468 37380 => 'ExposureBiasValue', // The exposure bias.
469 37381 => 'MaxApertureValue', // The smallest F number of the lens.
470 37382 => 'SubjectDistance', // The distance to the subject, given in meters.
471 37383 => 'MeteringMode', // The metering mode.
472 37384 => 'LightSource', // The kind of light source.
473 37385 => 'Flash', // Indicates the status of flash when the image was shot.
474 37386 => 'FocalLength', // The actual focal length of the lens, in mm.
475 37396 => 'SubjectArea', // Indicates the location and area of the main subject in the overall scene.
476 37500 => 'MakerNote', // Manufacturer specific information.
477 37510 => 'UserComment', // Keywords or comments on the image; complements ImageDescription.
478 37520 => 'SubsecTime', // A tag used to record fractions of seconds for the DateTime tag.
479 37521 => 'SubsecTimeOriginal', // A tag used to record fractions of seconds for the DateTimeOriginal tag.
480 37522 => 'SubsecTimeDigitized', // A tag used to record fractions of seconds for the DateTimeDigitized tag.
481 40960 => 'FlashpixVersion', // The Flashpix format version supported by a FPXR file.
482 40961 => 'ColorSpace', // The color space information tag is always recorded as the color space specifier.
483 40962 => 'PixelXDimension', // Specific to compressed data; the valid width of the meaningful image.
484 40963 => 'PixelYDimension', // Specific to compressed data; the valid height of the meaningful image.
485 40964 => 'RelatedSoundFile', // Used to record the name of an audio file related to the image data.
486 41483 => 'FlashEnergy', // Indicates the strobe energy at the time the image is captured, as measured in Beam Candle Power Seconds
487 41484 => 'SpatialFrequencyResponse', // Records the camera or input device spatial frequency table and SFR values in the direction of image width, image height, and diagonal direction, as specified in ISO 12233.
488 41486 => 'FocalPlaneXResolution', // Indicates the number of pixels in the image width (X) direction per FocalPlaneResolutionUnit on the camera focal plane.
489 41487 => 'FocalPlaneYResolution', // Indicates the number of pixels in the image height (Y) direction per FocalPlaneResolutionUnit on the camera focal plane.
490 41488 => 'FocalPlaneResolutionUnit', // Indicates the unit for measuring FocalPlaneXResolution and FocalPlaneYResolution.
491 41492 => 'SubjectLocation', // Indicates the location of the main subject in the scene.
492 41493 => 'ExposureIndex', // Indicates the exposure index selected on the camera or input device at the time the image is captured.
493 41495 => 'SensingMethod', // Indicates the image sensor type on the camera or input device.
494 41728 => 'FileSource', // Indicates the image source.
495 41729 => 'SceneType', // Indicates the type of scene.
496 41730 => 'CFAPattern', // Indicates the color filter array (CFA) geometric pattern of the image sensor when a one-chip color area sensor is used.
497 41985 => 'CustomRendered', // Indicates the use of special processing on image data, such as rendering geared to output.
498 41986 => 'ExposureMode', // Indicates the exposure mode set when the image was shot.
499 41987 => 'WhiteBalance', // Indicates the white balance mode set when the image was shot.
500 41988 => 'DigitalZoomRatio', // Indicates the digital zoom ratio when the image was shot.
501 41989 => 'FocalLengthIn35mmFilm', // Indicates the equivalent focal length assuming a 35mm film camera, in mm.
502 41990 => 'SceneCaptureType', // Indicates the type of scene that was shot.
503 41991 => 'GainControl', // Indicates the degree of overall image gain adjustment.
504 41992 => 'Contrast', // Indicates the direction of contrast processing applied by the camera when the image was shot.
505 41993 => 'Saturation', // Indicates the direction of saturation processing applied by the camera when the image was shot.
506 41994 => 'Sharpness', // Indicates the direction of sharpness processing applied by the camera when the image was shot.
507 41995 => 'DeviceSettingDescription', // This tag indicates information on the picture-taking conditions of a particular camera model.
508 41996 => 'SubjectDistanceRange', // Indicates the distance to the subject.
509 42016 => 'ImageUniqueID', // Indicates an identifier assigned uniquely to each image.
510 );
511 }
512 return (isset($TIFFcommentName[$id]) ? $TIFFcommentName[$id] : 'unknown/invalid ('.$id.')');
513 }
514
515
516 }
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