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source: extensions/AMetaData/JpegMetaData/JpegMetaData.class.php @ 7519

Last change on this file since 7519 was 7519, checked in by grum, 14 years ago
Exploit the JpegMetadata class previous evolution feature:1975, feature:1976, feature:1978
Property svn:executable set to ``*
File size: 28.6 KB

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1	<?php
2	/**
3	* --:: JPEG MetaDatas ::-------------------------------------------------------
4	*
5	* Version : 1.1.0
6	* Date : 2010-07-29
7	*
8	* Author : Grum
9	* email : grum at piwigo.org
10	* website : http://photos.grum.fr
11	*
12	* << May the Little SpaceFrog be with you ! >>
13	*
14	* +-----------------------------------------------------------------------+
15	* \| JpegMetaData - a PHP based Jpeg Metadata manager \|
16	* +-----------------------------------------------------------------------+
17	* \| Copyright(C) 2010 Grum - http://www.grum.fr \|
18	* +-----------------------------------------------------------------------+
19	* \| This program is free software; you can redistribute it and/or modify \|
20	* \| it under the terms of the GNU General Public License as published by \|
21	* \| the Free Software Foundation \|
22	* \| \|
23	* \| This program is distributed in the hope that it will be useful, but \|
24	* \| WITHOUT ANY WARRANTY; without even the implied warranty of \|
25	* \| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU \|
26	* \| General Public License for more details. \|
27	* \| \|
28	* \| You should have received a copy of the GNU General Public License \|
29	* \| along with this program; if not, write to the Free Software \|
30	* \| Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, \|
31	* \| USA. \|
32	* +-----------------------------------------------------------------------+
33	*
34	*
35	* +-:: HISTORY ::--------+-----------------------------------------------------
36	* \| \| \|
37	* \| Release \| Date \|
38	* +---------+------------+-----------------------------------------------------
39	* \| 0.1.0a \| 2009-12-26 \|
40	* \| \| \|
41	* \| 1.0.0 \| \| * first public release
42	* \| \| \|
43	* \| 1.1.0 \| 2010-07-29 \| * mantis bug:1686
44	* \| \| \| . bug reported on IfdReader
45	* \| \| \| When sub IFD (0x8769) refers to a sub IFD with
46	* \| \| \| an offset lower than the current IFD, the reader
47	* \| \| \| loops on the current data block and terminate
48	* \| \| \| with an error 500 ; fix consist to ignore this
49	* \| \| \| kind of offset, but it's not the right solution
50	* \| \| \| (right solution: to be able to read negative
51	* \| \| \| offset)
52	* \| \| \|
53	* \| \| \| * mantis feature : 1719
54	* \| \| \| . Coding a DateTime class ; used only if there is
55	* \| \| \| no PHP built-in DateTime class
56	* \| \| \|
57	* \| \| \| * add the "schema" property to Tag class
58	* \| \| \|
59	* \| \| \| * fixed bug about filtering schema
60	* \| \| \| . when loading metadata, filter on schema are now
61	* \| \| \| applied ; 'magic' metadata are computed even if
62	* \| \| \| the other schema are filtered
63	* \| \| \|
64	* \| \| \| * add the "getTag" function
65	* \| \| \|
66	* \| 1.1.1 \| 2010-09-13 \| * mantis bug:1826
67	* \| \| \| . digiKam XMP tags are not recognized
68	* \| \| \|
69	* \| \| \| * mantis bug:1859
70	* \| \| \| . JpegMetadata class can't manage multiple IPTC
71	* \| \| \| keywords
72	* \| \| \|
73	* \| \| \| * mantis bug:1870
74	* \| \| \| . Xmp ISOSpeedRatings was not interpreted by
75	* \| \| \| 'Magic' metadata
76	* \| \| \|
77	* \| 1.1.3 \| 2010-09-30 \| * mantis bug:1894
78	* \| \| \| . Error when filling the metadata repository
79	* \| \| \|
80	* \| \| \| * mantis bug:1898
81	* \| \| \| . Warning "division by zero" on Canon images
82	* \| \| \|
83	* \| \| \| * mantis bug:1911
84	* \| \| \| . Unable to read Jpeg file if there is extradata
85	* \| \| \| after the EOI marker
86	* \| \| \|
87	* \| \| \| * mantis bug:1863
88	* \| \| \| . Except "keywords" meta, all IPTC meta declared
89	* \| \| \| as "repeatable" are not managed
90	* \| \| \|
91	* \| \| \| * mantis bug:1955
92	* \| \| \| . Incorrect mapping for IPTC File format
93	* \| \| \|
94	* \| \| \| * mantis bug:1955
95	* \| \| \| . Incorrect mapping for IPTC File format
96	* \| \| \|
97	* \| \| \| * mantis bug:1956
98	* \| \| \| . IPTC "Subject Reference" is not implemented
99	* \| \| \|
100	* \| \| \| * mantis bug:1965
101	* \| \| \| . add XML <lr:hierarchicalSubject> markup
102	* \| \| \|
103	* \| \| \| * mantis bug:1975
104	* \| \| \| . Implement COM segment as a tag
105	* \| \| \|
106	* \| \| \| * mantis bug:1976
107	* \| \| \| . Implement keywords as magic tag
108	* \| \| \|
109	* \| \| \| * mantis bug:1978
110	* \| \| \| . Some meta names are not translated in french
111	* \| \| \|
112	* \| \| \|
113	* \| \| \|
114	* \| \| \|
115	* \| \| \|
116	* \| \| \|
117	* \| \| \|
118	* +---------+------------+-----------------------------------------------------
119	*
120	*
121	* -----------------------------------------------------------------------------
122	*
123	* References about definition & interpretation of metadata tags :
124	* - EXIF 2.20 Specification => http://www.exif.org/Exif2-2.PDF
125	* - TIFF 6.0 Specification => http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
126	* - Exiftool by Phil Harvey => http://www.sno.phy.queensu.ca/~phil/exiftool/
127	* http://owl.phy.queensu.ca/~phil/exiftool/TagNames
128	* - Exiv2 by Andreas Huggel => http://www.exiv2.org/
129	* - MetaData working group => http://www.metadataworkinggroup.org/specs/
130	* - Adobe XMP Developer Center => http://www.adobe.com/devnet/xmp/
131	* - Gezuz => http://gezus.one.free.fr/?Plugin-EXIF-pour-Spip-1-9-2
132	* - JPEG format => http://crousseau.free.fr/imgfmt_jpeg.htm
133	* - International Press Telecomunication Council specifications
134	* => http://www.iptc.org/
135	* - IPTC headers structure => http://www.codeproject.com/KB/graphics/iptc.aspx?msg=1014929
136	* - CPAN => http://search.cpan.org/dist/Image-MetaData-JPEG/lib/Image/MetaData/JPEG/Structures.pod
137	* => http://search.cpan.org/~bettelli/Image-MetaData-JPEG/lib/Image/MetaData/JPEG/MakerNotes.pod
138	*
139	* -----------------------------------------------------------------------------
140	* To support internationalization the JpegMetaData package uses ".po" and ".mo"
141	* files, and use "php-gettext"
142	* ==> See files in External/php-gettext for more information about this project
143	* -----------------------------------------------------------------------------
144	*
145	* The JpegMetaData is the main class for reading metadata of a Jpeg file
146	*
147	* It provides two essentialy high level functions to read different kind of
148	* metadata (EXIF, IPTC, XMP) :
149	* - (static) getTagList
150	* - load
151	* - getTags
152	* - getTag
153	*
154	* -----------------------------------------------------------------------------
155	*
156	* .. Notes ..
157	*
158	* About tags and translation in local lang
159	* With the 'getTags()' method, the JpegMetaData returns an array of Tag objects
160	* found in the jpeg file.
161	*
162	* A Tag object have 2 properties that can be translated into a local language :
163	* - the name, getted with 'getName()'
164	* - the valueLabel, getted with 'getLabel()'
165	*
166	* Theses properties ARE NOT translated automatically.
167	*
168	* You can translate it with the Locale class, by using the static method 'get'
169	*
170	* Example :
171	* Locale::get($myTag->getName()) will return the translated name of the Tag
172	* Locale::get($myTag->getLabel()) will return the translated value of the Tag
173	*
174	* ===========> See Tag.class.php to know more about the Tag class <============
175	* ========> See Locale.class.php to know more about the Locale class <=========
176	*
177	*
178	* -----------------------------------------------------------------------------
179	*/
180
181	define("JPEG_METADATA_DIR", dirname(__FILE__)."/");
182
183	require_once(JPEG_METADATA_DIR."Common/DateTime.class.php");
184	require_once(JPEG_METADATA_DIR."Readers/JpegReader.class.php");
185	require_once(JPEG_METADATA_DIR."TagDefinitions/MagicTags.class.php");
186
187	class JpegMetaData
188	{
189	const TAGFILTER_KNOWN = 0x01;
190	const TAGFILTER_IMPLEMENTED = 0x02;
191	const TAGFILTER_ALL = 0x03;
192
193	private $jpeg = null;
194	protected $tags = Array();
195	private $options = Array();
196
197	/**
198	* this static function returns an array of tags definitions
199	*
200	* the only parameter is an array to determine filter options
201	*
202	* ---------------------+---------------------------------------------------
203	* key \| descriptions/values
204	* ---------------------+---------------------------------------------------
205	* filter \| Integer
206	* \| This options is used to filter implemented tag
207	* \| JpegMetaData::TAGFILTER_ALL
208	* \| => returns all the tags
209	* \| JpegMetaData::TAGFILTER_IMPLEMENTED
210	* \| => returns only the implemented tags
211	* \|
212	* optimizeIptcDateTime \| Boolean
213	* \| IPTC Date/Time are separated into 2 tags
214	* \| if this option is set to true, only dates tags are
215	* \| returned (assuming this option is used when an
216	* \| image file is loaded)
217	* \|
218	* exif \| Boolean
219	* iptc \| If set to true, the function returns all the tags
220	* \| known for the specified type tag
221	* xmp \|
222	* maker \| maker => returns specifics tags from all the known
223	* magic \| makers
224	* \|
225	* ---------------------+---------------------------------------------------
226	*
227	* returned value is an array
228	* each keys is a tag name and the associated value is a 2-level array
229	* 'implemented' => Boolean, allowing to know if the tags is implemented or
230	* not
231	* 'translatable'=> Boolean, allowing to know if the tag value can be
232	* translated
233	* 'name' => String, the tag name translated in locale language
234	*
235	* @Param Array $options (optional)
236	* @return Array(keyName => Array('implemented' => Boolean, 'name' => String))
237	*/
238	static public function getTagList($options=Array())
239	{
240	$default=Array(
241	'filter' => self::TAGFILTER_ALL,
242	'optimizeIptcDateTime' => false,
243	'exif' => true,
244	'iptc' => true,
245	'xmp' => true,
246	'maker' => true,
247	'magic' => true,
248	'com' => true
249	);
250
251	foreach($default as $key => $val)
252	{
253	if(array_key_exists($key, $options))
254	$default[$key]=$options[$key];
255	}
256
257	$list=Array();
258	$returned=Array();
259
260	if($default['exif'])
261	{
262	$list[]="exif";
263	$list[]="gps";
264	}
265
266	if($default['maker'])
267	{
268	$list[]=MAKER_PENTAX;
269	$list[]=MAKER_NIKON;
270	$list[]=MAKER_CANON;
271	}
272
273	if($default['iptc'])
274	$list[]="iptc";
275
276	if($default['xmp'])
277	$list[]="xmp";
278
279	if($default['magic'])
280	$list[]="magic";
281
282	if($default['com'])
283	$list[]="com";
284
285	foreach($list as $val)
286	{
287	unset($tmp);
288
289	switch($val)
290	{
291	case "exif":
292	$tmp=new IfdTags();
293	$schema=Schemas::EXIF;
294	break;
295	case "gps":
296	$tmp=new GpsTags();
297	$schema=Schemas::EXIF_GPS;
298	break;
299	case "iptc":
300	$tmp=new IptcTags();
301	$schema=Schemas::IPTC;
302	break;
303	case "xmp":
304	$tmp=new XmpTags();
305	$schema=Schemas::XMP;
306	break;
307	case "magic":
308	$tmp=new MagicTags();
309	$schema=Schemas::MAGIC;
310	break;
311	case "com":
312	$tmp=new ComTags();
313	$schema=Schemas::COM;
314	break;
315	case MAKER_PENTAX:
316	include_once(JPEG_METADATA_DIR."TagDefinitions/PentaxTags.class.php");
317	$tmp=new PentaxTags();
318	$schema=Schemas::EXIF_MAKER.'.'.MAKER_PENTAX;
319	break;
320	case MAKER_NIKON:
321	include_once(JPEG_METADATA_DIR."TagDefinitions/NikonTags.class.php");
322	$tmp=new NikonTags();
323	$schema=Schemas::EXIF_MAKER.'.'.MAKER_NIKON;
324	break;
325	case MAKER_CANON:
326	include_once(JPEG_METADATA_DIR."TagDefinitions/CanonTags.class.php");
327	$tmp=new CanonTags();
328	$schema=Schemas::EXIF_MAKER.'.'.MAKER_CANON;
329	break;
330	default:
331	$tmp=null;
332	$schema="?";
333	break;
334	}
335
336	if(!is_null($tmp))
337	foreach($tmp->getTags() as $key => $tag)
338	{
339	if(self::filter(true, $tag['implemented'], $default['filter']))
340	{
341	if(array_key_exists('tagName', $tag))
342	$name=$tag['tagName'];
343	else
344	$name=$key;
345
346	if(array_key_exists('schema', $tag) and $val==Schemas::EXIF)
347	$subSchema=".".$tag['schema'];
348	else
349	$subSchema="";
350
351	if($val==Schemas::XMP)
352	$keyName=$schema.$subSchema.".".$key;
353	else
354	$keyName=$schema.$subSchema.".".$name;
355	$returned[$keyName]=Array(
356	'implemented' => $tag['implemented'],
357	'translatable' => $tag['translatable'],
358	'name' => $name
359	);
360	}
361	}
362	}
363
364	ksort($returned);
365
366	return($returned);
367	}
368
369
370	/**
371	* the filter function is used by the classe to determine if a tag is
372	* filtered or not
373	*
374	* @Param Boolean $known
375	* @Param Boolean $implemented
376	* @Param Integer $filter
377	*
378	*/
379	static public function filter($known, $implemented, $filter)
380	{
381	return(($known and (($filter & self::TAGFILTER_KNOWN) == self::TAGFILTER_KNOWN )) or
382	($implemented and (($filter & self::TAGFILTER_IMPLEMENTED) == self::TAGFILTER_IMPLEMENTED )));
383	}
384
385	/**
386	* the constructor need an optional filename and options
387	*
388	* if no filename is given, you can use the "load" function after the object
389	* is instancied
390	*
391	* if no options are given, the class use the default values
392	*
393	* ---------------------+---------------------------------------------------
394	* key \| descriptions/values
395	* ---------------------+---------------------------------------------------
396	* filter \| Integer
397	* \| This options is used to filter implemented tag
398	* \| JpegMetaData::TAGFILTER_ALL
399	* \| => returns all the tags
400	* \| JpegMetaData::TAGFILTER_IMPLEMENTED
401	* \| => returns only the implemented tags, not
402	* \| implemented tag are excluded
403	* \| JpegMetaData::TAGFILTER_KNOWN
404	* \| => returns only the known tags (implemented or
405	* \| not), unknown tag are excluded
406	* \|
407	* optimizeIptcDateTime \| Boolean
408	* \| IPTC Date/Time are separated into 2 tags
409	* \| if this option is set to true, only dates tags are
410	* \| returned (in this case, time is included is the
411	* \| date)
412	* \|
413	* exif \| Boolean
414	* iptc \| If set to true, the function returns all the tags
415	* xmp \| known for the specified type tag
416	* magic \| the exif parameter include the maker tags
417	* \|
418	* ---------------------+---------------------------------------------------
419	*
420	* @Param String $file (optional)
421	* @Param Array $options (optional)
422	*
423	*/
424	function __construct($file = "", $options = Array())
425	{
426	$this->load($file, $options);
427	}
428
429	function __destruct()
430	{
431	$this->unsetAll();
432	}
433
434	/**
435	* load a file
436	*
437	* options values are the same than the constructor's options
438	*
439	* @Param String $file
440	* @Param Array $options (optional)
441	*
442	*/
443	public function load($file, $options = Array())
444	{
445	$this->unsetAll();
446
447	$this->initializeOptions($options);
448	$this->tags = Array();
449	$this->jpeg = new JpegReader($file);
450
451	if($this->jpeg->isLoaded() and $this->jpeg->isValid())
452	{
453	foreach($this->jpeg->getAppMarkerSegments() as $key => $appMarkerSegment)
454	{
455	if($appMarkerSegment->dataLoaded())
456	{
457	$data=$appMarkerSegment->getData();
458
459	if($data instanceof TiffReader)
460	{
461	/*
462	* Load Exifs tags from Tiff block
463	*/
464	if($data->getNbIFDs()>0 and
465	($this->options['magic'] or $this->options['exif']))
466	{
467	$this->loadIfdTags($data->getIFD(0), Schemas::EXIF_TIFF);
468	}
469	}
470	elseif($data instanceof XmpReader)
471	{
472	/*
473	* Load Xmp tags from Xmp block
474	*/
475	if($this->options['magic'] or $this->options['xmp'])
476	{
477	$this->loadTags($data->getTags(), Schemas::XMP);
478	}
479	}
480	elseif($data instanceof IptcReader)
481	{
482	/*
483	* Load IPTC tags from IPTC block
484	*/
485	if($this->options['optimizeIptcDateTime'])
486	$data->optimizeDateTime();
487
488	if($this->options['magic'] or $this->options['iptc'])
489	{
490	$this->loadTags($data->getTags(), Schemas::IPTC);
491	}
492	}
493	elseif($data instanceof ComReader)
494	{
495	$this->loadTags($data->getTags(), Schemas::COM);
496	}
497	}
498	}
499
500	if($this->options['magic'])
501	{
502	$this->processMagicTags();
503	}
504
505	// clean all unwanted metadata
506	foreach($this->tags as $key => $tag)
507	{
508	if(isset($this->options[$tag->getSchema()]) and !$this->options[$tag->getSchema()]) unset($this->tags[$key]);
509	}
510
511	ksort($this->tags);
512	}
513	}
514
515	/**
516	* This function returns an array of tags found in the loaded file
517	*
518	* It's possible to made a second selection to filter items
519	*
520	* ---------------------+---------------------------------------------------
521	* key \| descriptions/values
522	* ---------------------+---------------------------------------------------
523	* tagFilter \| Integer
524	* \| This options is used to filter implemented tag
525	* \| JpegMetaData::TAGFILTER_ALL
526	* \| => returns all the tags
527	* \| JpegMetaData::TAGFILTER_IMPLEMENTED
528	* \| => returns only the implemented tags, not
529	* \| implemented tag are excluded
530	* \| JpegMetaData::TAGFILTER_KNOWN
531	* \| => returns only the known tags (implemented or
532	* \| not), unknown tag are excluded
533	* \|
534	* ---------------------+---------------------------------------------------
535	*
536	* Note, the filter is applied on loaded tags. If a filter was applied when
537	* the file was loaded, you cannot expand the tag list, only reduce
538	* example :
539	* $jpegmd = new JpegMetadata($file, Array('filter' => JpegMetaData::TAGFILTER_IMPLEMENTED));
540	* => the unknown tag are not loaded
541	* $jpegmd->getTags(JpegMetaData::TAGFILTER_ALL)
542	* => unknown tag will not be restitued because they are not loaded...
543	*
544	* the function returns an array of Tag.
545	*
546	*
547	* ===========> See the Tag.class.php to know all about a tag <=============
548	*
549	* @Param Integer $tagFilter (optional)
550	*
551	*/
552	public function getTags($tagFilter = self::TAGFILTER_ALL)
553	{
554	$returned=Array();
555	foreach($this->tags as $key => $val)
556	{
557	if(self::filter($val->isKnown(), $val->isImplemented(), $tagFilter))
558	{
559	$returned[$key]=$val;
560	}
561	}
562	return($returned);
563	}
564
565
566	/**
567	* This function returns the tag object for the given tag name
568	*
569	* @param String $key : the tag name (ie: "exif.exif.ApertureValue")
570	* @return Tag : the tag object, null if the tag doesn't exist
571	*/
572	public function getTag($key)
573	{
574	if(array_key_exists($key, $this->tags))
575	{
576	return($this->tags[$key]);
577	}
578	return(null);
579	}
580
581	/**
582	* initialize the options...
583	*
584	* @Param Array $options (optional)
585	*
586	*/
587	private function initializeOptions($options=Array())
588	{
589	$this->options = Array(
590	'filter' => self::TAGFILTER_ALL,
591	'optimizeIptcDateTime' => false,
592	'exif' => true,
593	'iptc' => true,
594	'xmp' => true,
595	'magic' => true,
596	'com' => true
597	);
598
599	foreach($this->options as $key => $val)
600	{
601	if(array_key_exists($key, $options))
602	$this->options[$key]=$options[$key];
603	}
604	}
605
606	/**
607	* load tags from an IFD structure
608	*
609	* see Tiff.class.php and IfdReader.class.php for more informations
610	*
611	* @Param IfdReader $ifd
612	* @Param String $exifKey
613	*
614	*/
615	private function loadIfdTags($ifd, $exifKey)
616	{
617	foreach($ifd->getTags() as $key => $tag)
618	{
619	if((self::filter($tag->getTag()->isKnown(), $tag->getTag()->isImplemented(), $this->options['filter'])) or
620	($tag->getTag()->getName()=='Exif IFD Pointer' or
621	$tag->getTag()->getName()=='MakerNote' or
622	$tag->getTag()->getName()=='GPS IFD Pointer'))
623	{
624	/*
625	* only tag responding to the filter are selected
626	* note the tags 'Exif IFD Pointer', 'MakerNote' & 'GPS IFD Pointer'
627	* are not declared as implemented (otherwise they are visible with
628	* the static 'getTagList' function) but must be selected even if
629	* filter says "implemented only"
630	*/
631	if($tag->getTag()->getLabel() instanceof IfdReader)
632	{
633	switch($tag->getTag()->getName())
634	{
635	case 'Exif IFD Pointer':
636	$exifKey2=Schemas::EXIF_EXIF;
637	break;
638	case 'MakerNote':
639	$exifKey2=Schemas::EXIF_MAKER.".".$tag->getTag()->getLabel()->getMaker();
640	break;
641	case 'GPS IFD Pointer':
642	$exifKey2=Schemas::EXIF_GPS;
643	break;
644	default:
645	$exifKey2=$exifKey;
646	break;
647	}
648	$this->loadIfdTags($tag->getTag()->getLabel(), $exifKey2);
649	}
650	else
651	{
652	$this->tags[$exifKey.".".$tag->getTag()->getName()]=$tag->getTag();
653	}
654	}
655	}
656	}
657
658	/**
659	* Used to load tags from an IPTc or XMP structure
660	*
661	* see IptcReader.class.php and XmpReader.class.php
662	*
663	* @Param Tag[] $ifd
664	* @Param String $tagKey
665	*
666	*/
667	private function loadTags($tags, $tagKey)
668	{
669	foreach($tags as $key => $tag)
670	{
671	if(self::filter($tag->isKnown(), $tag->isImplemented(), $this->options['filter']))
672	{
673	$this->tags[$tagKey.".".$tag->getName()]=$tag;
674	}
675	}
676	}
677
678	/**
679	* MagicTags are built with this function
680	*/
681	protected function processMagicTags()
682	{
683	$magicTags=new MagicTags();
684
685	foreach($magicTags->getTags() as $key => $val)
686	{
687	$tag=new Tag($key,0,$key);
688
689	for($i=0; $i<count($val['tagValues']); $i++)
690	{
691	$found=true;
692	preg_match_all('/{([a-z0-9:\.\s\/])(\[.\])?}/i', $val['tagValues'][$i], $returned, PREG_PATTERN_ORDER);
693	foreach($returned[1] as $testKey)
694	{
695	$found=$found & (array_key_exists($testKey, $this->tags) and $this->tags[$testKey]->getValue()!='');
696	}
697	if(count($returned[1])==0) $found=false;
698
699	if($found)
700	{
701	$returned=trim(
702	preg_replace_callback(
703	'/{([a-z0-9:\.\s\/\[\]]*)}/i',
704	Array(&$this, "processMagicTagsCB"),
705	$val['tagValues'][$i]
706	)
707	);
708
709	$returned=$this->processSpecialMagicTag($key, $returned);
710
711	$tag->setValue($returned);
712	$tag->setLabel($returned);
713	$tag->setKnown(true);
714	$tag->setImplemented($val['implemented']);
715	$tag->setTranslatable($val['translatable']);
716	$tag->setSchema(Schemas::MAGIC);
717
718	$i=count($val['tagValues']);
719	}
720	}
721
722	if($tag->isImplemented() and $found)
723	{
724	$this->tags["magic.".$key]=$tag;
725	}
726
727	unset($tag);
728	}
729	unset($magicTags);
730	}
731
732	/**
733	* this function is called by the processMagicTags to replace tagId by the
734	* tag values
735	*
736	* @param Array $matches : array[1] = the tagId
737	* @return String : the tag value
738	*/
739	protected function processMagicTagsCB($matches)
740	{
741	$label="";
742	preg_match_all('/([a-z0-9:\.\s\/])\[(.)\]/i', $matches[1], $result, PREG_PATTERN_ORDER);
743	if(count($result[0])>0)
744	{
745
746	if(array_key_exists($result[1][0], $this->tags))
747	{
748	$tag=$this->tags[$result[1][0]]->getLabel();
749
750	preg_match_all('/([a-z0-9:\.\s\/])\[(.)\]/i', $result[2][0], $result2, PREG_PATTERN_ORDER);
751
752	if(count($result2[0])>0)
753	{
754	if(array_key_exists($result2[2][0], $tag[$result2[1][0]] ))
755	$label=$tag[$result2[1][0]][$result2[2][0]];
756	}
757	else
758	{
759	if(array_key_exists($result[2][0], $tag))
760	$label=$tag[$result[2][0]];
761	}
762	}
763	}
764	else
765	{
766	if(array_key_exists($matches[1], $this->tags))
767	{
768	$label=$this->tags[$matches[1]]->getLabel();
769	}
770	}
771	if($label instanceof DateTime)
772	return($label->format("Y-m-d H:i:s"));
773
774	$label=XmpTags::getAltValue($label, L10n::getLanguage());
775
776	if(is_array($label))
777	{
778	return(implode(", ", $label));
779	}
780
781	return(trim($label));
782	}
783
784	/**
785	*
786	*
787	*/
788	protected function processSpecialMagicTag($key, $value)
789	{
790	switch($key)
791	{
792	case "GPS.LatitudeNum":
793	case "GPS.LongitudeNum":
794	preg_match_all('/(\d{1,3})°\s(\d{1,2})\'(?:\s(\d+(?:\.\d+)?)")?[\s\\|\.]*(N\|S\|E\|W)/i', $value, $result);
795	$num=(float)$result[1][0] + ((float) $result[2][0])/60;
796	if($result[3][0]!="") $num+= ((float) $result[3][0])/3600;
797	if($result[4][0]=="W" or $result[4][0]=="S") $num=-$num;
798	return($num);
799	case "Author.Keywords":
800	$list=array_flip(array_flip(explode(',', str_replace(array('/', '\|', ','), ',', $value))));
801	sort($list);
802	$tmp=array();
803	foreach($list as $key=>$val)
804	{
805	if(trim($val)!='') $tmp[]=trim($val);
806	}
807	return($tmp);
808	break;
809	default:
810	return($value);
811	}
812	}
813
814
815	/**
816	* used by the destructor to clean variables
817	*/
818	private function unsetAll()
819	{
820	unset($this->tags);
821	unset($this->jpeg);
822	unset($this->options);
823	}
824
825
826	} // class JpegMetaData
827
828	?>

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