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source: extensions/AMetaData/JpegMetaData/JpegMetaData.class.php @ 8969

Last change on this file since 8969 was 8969, checked in by grum, 13 years ago
release 0.5.9 fix bug:2141
Property svn:executable set to ``*
File size: 28.8 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	* \| 1.1.4 \| 2011-01-29 \| * mantis bug:2141
113	* \| \| \| . MakerNotes on some Nikon file are not recognized
114	* \| \| \| and script is terminated with a memory allocation
115	* \| \| \| error
116	* \| \| \|
117	* \| \| \|
118	* \| \| \|
119	* \| \| \|
120	* +---------+------------+-----------------------------------------------------
121	*
122	*
123	* -----------------------------------------------------------------------------
124	*
125	* References about definition & interpretation of metadata tags :
126	* - EXIF 2.20 Specification => http://www.exif.org/Exif2-2.PDF
127	* - TIFF 6.0 Specification => http://partners.adobe.com/public/developer/en/tiff/TIFF6.pdf
128	* - Exiftool by Phil Harvey => http://www.sno.phy.queensu.ca/~phil/exiftool/
129	* http://owl.phy.queensu.ca/~phil/exiftool/TagNames
130	* - Exiv2 by Andreas Huggel => http://www.exiv2.org/
131	* - MetaData working group => http://www.metadataworkinggroup.org/specs/
132	* - Adobe XMP Developer Center => http://www.adobe.com/devnet/xmp/
133	* - Gezuz => http://gezus.one.free.fr/?Plugin-EXIF-pour-Spip-1-9-2
134	* - JPEG format => http://crousseau.free.fr/imgfmt_jpeg.htm
135	* - International Press Telecomunication Council specifications
136	* => http://www.iptc.org/
137	* - IPTC headers structure => http://www.codeproject.com/KB/graphics/iptc.aspx?msg=1014929
138	* - CPAN => http://search.cpan.org/dist/Image-MetaData-JPEG/lib/Image/MetaData/JPEG/Structures.pod
139	* => http://search.cpan.org/~bettelli/Image-MetaData-JPEG/lib/Image/MetaData/JPEG/MakerNotes.pod
140	*
141	* -----------------------------------------------------------------------------
142	* To support internationalization the JpegMetaData package uses ".po" and ".mo"
143	* files, and use "php-gettext"
144	* ==> See files in External/php-gettext for more information about this project
145	* -----------------------------------------------------------------------------
146	*
147	* The JpegMetaData is the main class for reading metadata of a Jpeg file
148	*
149	* It provides two essentialy high level functions to read different kind of
150	* metadata (EXIF, IPTC, XMP) :
151	* - (static) getTagList
152	* - load
153	* - getTags
154	* - getTag
155	*
156	* -----------------------------------------------------------------------------
157	*
158	* .. Notes ..
159	*
160	* About tags and translation in local lang
161	* With the 'getTags()' method, the JpegMetaData returns an array of Tag objects
162	* found in the jpeg file.
163	*
164	* A Tag object have 2 properties that can be translated into a local language :
165	* - the name, getted with 'getName()'
166	* - the valueLabel, getted with 'getLabel()'
167	*
168	* Theses properties ARE NOT translated automatically.
169	*
170	* You can translate it with the Locale class, by using the static method 'get'
171	*
172	* Example :
173	* Locale::get($myTag->getName()) will return the translated name of the Tag
174	* Locale::get($myTag->getLabel()) will return the translated value of the Tag
175	*
176	* ===========> See Tag.class.php to know more about the Tag class <============
177	* ========> See Locale.class.php to know more about the Locale class <=========
178	*
179	*
180	* -----------------------------------------------------------------------------
181	*/
182
183	define("JPEG_METADATA_DIR", dirname(__FILE__)."/");
184
185	require_once(JPEG_METADATA_DIR."Common/DateTime.class.php");
186	require_once(JPEG_METADATA_DIR."Readers/JpegReader.class.php");
187	require_once(JPEG_METADATA_DIR."TagDefinitions/MagicTags.class.php");
188
189	class JpegMetaData
190	{
191	const TAGFILTER_KNOWN = 0x01;
192	const TAGFILTER_IMPLEMENTED = 0x02;
193	const TAGFILTER_ALL = 0x03;
194
195	private $jpeg = null;
196	protected $tags = Array();
197	private $options = Array();
198
199	/**
200	* this static function returns an array of tags definitions
201	*
202	* the only parameter is an array to determine filter options
203	*
204	* ---------------------+---------------------------------------------------
205	* key \| descriptions/values
206	* ---------------------+---------------------------------------------------
207	* filter \| Integer
208	* \| This options is used to filter implemented tag
209	* \| JpegMetaData::TAGFILTER_ALL
210	* \| => returns all the tags
211	* \| JpegMetaData::TAGFILTER_IMPLEMENTED
212	* \| => returns only the implemented tags
213	* \|
214	* optimizeIptcDateTime \| Boolean
215	* \| IPTC Date/Time are separated into 2 tags
216	* \| if this option is set to true, only dates tags are
217	* \| returned (assuming this option is used when an
218	* \| image file is loaded)
219	* \|
220	* exif \| Boolean
221	* iptc \| If set to true, the function returns all the tags
222	* \| known for the specified type tag
223	* xmp \|
224	* maker \| maker => returns specifics tags from all the known
225	* magic \| makers
226	* \|
227	* ---------------------+---------------------------------------------------
228	*
229	* returned value is an array
230	* each keys is a tag name and the associated value is a 2-level array
231	* 'implemented' => Boolean, allowing to know if the tags is implemented or
232	* not
233	* 'translatable'=> Boolean, allowing to know if the tag value can be
234	* translated
235	* 'name' => String, the tag name translated in locale language
236	*
237	* @Param Array $options (optional)
238	* @return Array(keyName => Array('implemented' => Boolean, 'name' => String))
239	*/
240	static public function getTagList($options=Array())
241	{
242	$default=Array(
243	'filter' => self::TAGFILTER_ALL,
244	'optimizeIptcDateTime' => false,
245	'exif' => true,
246	'iptc' => true,
247	'xmp' => true,
248	'maker' => true,
249	'magic' => true,
250	'com' => true
251	);
252
253	foreach($default as $key => $val)
254	{
255	if(array_key_exists($key, $options))
256	$default[$key]=$options[$key];
257	}
258
259	$list=Array();
260	$returned=Array();
261
262	if($default['exif'])
263	{
264	$list[]="exif";
265	$list[]="gps";
266	}
267
268	if($default['maker'])
269	{
270	$list[]=MAKER_PENTAX;
271	$list[]=MAKER_NIKON;
272	$list[]=MAKER_CANON;
273	}
274
275	if($default['iptc'])
276	$list[]="iptc";
277
278	if($default['xmp'])
279	$list[]="xmp";
280
281	if($default['magic'])
282	$list[]="magic";
283
284	if($default['com'])
285	$list[]="com";
286
287	foreach($list as $val)
288	{
289	unset($tmp);
290
291	switch($val)
292	{
293	case "exif":
294	$tmp=new IfdTags();
295	$schema=Schemas::EXIF;
296	break;
297	case "gps":
298	$tmp=new GpsTags();
299	$schema=Schemas::EXIF_GPS;
300	break;
301	case "iptc":
302	$tmp=new IptcTags();
303	$schema=Schemas::IPTC;
304	break;
305	case "xmp":
306	$tmp=new XmpTags();
307	$schema=Schemas::XMP;
308	break;
309	case "magic":
310	$tmp=new MagicTags();
311	$schema=Schemas::MAGIC;
312	break;
313	case "com":
314	$tmp=new ComTags();
315	$schema=Schemas::COM;
316	break;
317	case MAKER_PENTAX:
318	include_once(JPEG_METADATA_DIR."TagDefinitions/PentaxTags.class.php");
319	$tmp=new PentaxTags();
320	$schema=Schemas::EXIF_MAKER.'.'.MAKER_PENTAX;
321	break;
322	case MAKER_NIKON:
323	include_once(JPEG_METADATA_DIR."TagDefinitions/NikonTags.class.php");
324	$tmp=new NikonTags();
325	$schema=Schemas::EXIF_MAKER.'.'.MAKER_NIKON;
326	break;
327	case MAKER_CANON:
328	include_once(JPEG_METADATA_DIR."TagDefinitions/CanonTags.class.php");
329	$tmp=new CanonTags();
330	$schema=Schemas::EXIF_MAKER.'.'.MAKER_CANON;
331	break;
332	default:
333	$tmp=null;
334	$schema="?";
335	break;
336	}
337
338	if(!is_null($tmp))
339	foreach($tmp->getTags() as $key => $tag)
340	{
341	if(self::filter(true, $tag['implemented'], $default['filter']))
342	{
343	if(array_key_exists('tagName', $tag))
344	$name=$tag['tagName'];
345	else
346	$name=$key;
347
348	if(array_key_exists('schema', $tag) and $val==Schemas::EXIF)
349	$subSchema=".".$tag['schema'];
350	else
351	$subSchema="";
352
353	if($val==Schemas::XMP)
354	$keyName=$schema.$subSchema.".".$key;
355	else
356	$keyName=$schema.$subSchema.".".$name;
357	$returned[$keyName]=Array(
358	'implemented' => $tag['implemented'],
359	'translatable' => $tag['translatable'],
360	'name' => $name
361	);
362	}
363	}
364	}
365
366	ksort($returned);
367
368	return($returned);
369	}
370
371
372	/**
373	* the filter function is used by the classe to determine if a tag is
374	* filtered or not
375	*
376	* @Param Boolean $known
377	* @Param Boolean $implemented
378	* @Param Integer $filter
379	*
380	*/
381	static public function filter($known, $implemented, $filter)
382	{
383	return(($known and (($filter & self::TAGFILTER_KNOWN) == self::TAGFILTER_KNOWN )) or
384	($implemented and (($filter & self::TAGFILTER_IMPLEMENTED) == self::TAGFILTER_IMPLEMENTED )));
385	}
386
387	/**
388	* the constructor need an optional filename and options
389	*
390	* if no filename is given, you can use the "load" function after the object
391	* is instancied
392	*
393	* if no options are given, the class use the default values
394	*
395	* ---------------------+---------------------------------------------------
396	* key \| descriptions/values
397	* ---------------------+---------------------------------------------------
398	* filter \| Integer
399	* \| This options is used to filter implemented tag
400	* \| JpegMetaData::TAGFILTER_ALL
401	* \| => returns all the tags
402	* \| JpegMetaData::TAGFILTER_IMPLEMENTED
403	* \| => returns only the implemented tags, not
404	* \| implemented tag are excluded
405	* \| JpegMetaData::TAGFILTER_KNOWN
406	* \| => returns only the known tags (implemented or
407	* \| not), unknown tag are excluded
408	* \|
409	* optimizeIptcDateTime \| Boolean
410	* \| IPTC Date/Time are separated into 2 tags
411	* \| if this option is set to true, only dates tags are
412	* \| returned (in this case, time is included is the
413	* \| date)
414	* \|
415	* exif \| Boolean
416	* iptc \| If set to true, the function returns all the tags
417	* xmp \| known for the specified type tag
418	* magic \| the exif parameter include the maker tags
419	* \|
420	* ---------------------+---------------------------------------------------
421	*
422	* @Param String $file (optional)
423	* @Param Array $options (optional)
424	*
425	*/
426	function __construct($file = "", $options = Array())
427	{
428	$this->load($file, $options);
429	}
430
431	function __destruct()
432	{
433	$this->unsetAll();
434	}
435
436	/**
437	* load a file
438	*
439	* options values are the same than the constructor's options
440	*
441	* @Param String $file
442	* @Param Array $options (optional)
443	*
444	*/
445	public function load($file, $options = Array())
446	{
447	$this->unsetAll();
448
449	$this->initializeOptions($options);
450	$this->tags = Array();
451	$this->jpeg = new JpegReader($file);
452
453	if($this->jpeg->isLoaded() and $this->jpeg->isValid())
454	{
455	foreach($this->jpeg->getAppMarkerSegments() as $key => $appMarkerSegment)
456	{
457	if($appMarkerSegment->dataLoaded())
458	{
459	$data=$appMarkerSegment->getData();
460
461	if($data instanceof TiffReader)
462	{
463	/*
464	* Load Exifs tags from Tiff block
465	*/
466	if($data->getNbIFDs()>0 and
467	($this->options['magic'] or $this->options['exif']))
468	{
469	$this->loadIfdTags($data->getIFD(0), Schemas::EXIF_TIFF);
470	}
471	}
472	elseif($data instanceof XmpReader)
473	{
474	/*
475	* Load Xmp tags from Xmp block
476	*/
477	if($this->options['magic'] or $this->options['xmp'])
478	{
479	$this->loadTags($data->getTags(), Schemas::XMP);
480	}
481	}
482	elseif($data instanceof IptcReader)
483	{
484	/*
485	* Load IPTC tags from IPTC block
486	*/
487	if($this->options['optimizeIptcDateTime'])
488	$data->optimizeDateTime();
489
490	if($this->options['magic'] or $this->options['iptc'])
491	{
492	$this->loadTags($data->getTags(), Schemas::IPTC);
493	}
494	}
495	elseif($data instanceof ComReader)
496	{
497	$this->loadTags($data->getTags(), Schemas::COM);
498	}
499	}
500	}
501
502	if($this->options['magic'])
503	{
504	$this->processMagicTags();
505	}
506
507	// clean all unwanted metadata
508	foreach($this->tags as $key => $tag)
509	{
510	if(isset($this->options[$tag->getSchema()]) and !$this->options[$tag->getSchema()]) unset($this->tags[$key]);
511	}
512
513	ksort($this->tags);
514	}
515	}
516
517	/**
518	* This function returns an array of tags found in the loaded file
519	*
520	* It's possible to made a second selection to filter items
521	*
522	* ---------------------+---------------------------------------------------
523	* key \| descriptions/values
524	* ---------------------+---------------------------------------------------
525	* tagFilter \| Integer
526	* \| This options is used to filter implemented tag
527	* \| JpegMetaData::TAGFILTER_ALL
528	* \| => returns all the tags
529	* \| JpegMetaData::TAGFILTER_IMPLEMENTED
530	* \| => returns only the implemented tags, not
531	* \| implemented tag are excluded
532	* \| JpegMetaData::TAGFILTER_KNOWN
533	* \| => returns only the known tags (implemented or
534	* \| not), unknown tag are excluded
535	* \|
536	* ---------------------+---------------------------------------------------
537	*
538	* Note, the filter is applied on loaded tags. If a filter was applied when
539	* the file was loaded, you cannot expand the tag list, only reduce
540	* example :
541	* $jpegmd = new JpegMetadata($file, Array('filter' => JpegMetaData::TAGFILTER_IMPLEMENTED));
542	* => the unknown tag are not loaded
543	* $jpegmd->getTags(JpegMetaData::TAGFILTER_ALL)
544	* => unknown tag will not be restitued because they are not loaded...
545	*
546	* the function returns an array of Tag.
547	*
548	*
549	* ===========> See the Tag.class.php to know all about a tag <=============
550	*
551	* @Param Integer $tagFilter (optional)
552	*
553	*/
554	public function getTags($tagFilter = self::TAGFILTER_ALL)
555	{
556	$returned=Array();
557	foreach($this->tags as $key => $val)
558	{
559	if(self::filter($val->isKnown(), $val->isImplemented(), $tagFilter))
560	{
561	$returned[$key]=$val;
562	}
563	}
564	return($returned);
565	}
566
567
568	/**
569	* This function returns the tag object for the given tag name
570	*
571	* @param String $key : the tag name (ie: "exif.exif.ApertureValue")
572	* @return Tag : the tag object, null if the tag doesn't exist
573	*/
574	public function getTag($key)
575	{
576	if(array_key_exists($key, $this->tags))
577	{
578	return($this->tags[$key]);
579	}
580	return(null);
581	}
582
583	/**
584	* initialize the options...
585	*
586	* @Param Array $options (optional)
587	*
588	*/
589	private function initializeOptions($options=Array())
590	{
591	$this->options = Array(
592	'filter' => self::TAGFILTER_ALL,
593	'optimizeIptcDateTime' => false,
594	'exif' => true,
595	'iptc' => true,
596	'xmp' => true,
597	'magic' => true,
598	'com' => true
599	);
600
601	foreach($this->options as $key => $val)
602	{
603	if(array_key_exists($key, $options))
604	$this->options[$key]=$options[$key];
605	}
606	}
607
608	/**
609	* load tags from an IFD structure
610	*
611	* see Tiff.class.php and IfdReader.class.php for more informations
612	*
613	* @Param IfdReader $ifd
614	* @Param String $exifKey
615	*
616	*/
617	private function loadIfdTags($ifd, $exifKey)
618	{
619	foreach($ifd->getTags() as $key => $tag)
620	{
621	if((self::filter($tag->getTag()->isKnown(), $tag->getTag()->isImplemented(), $this->options['filter'])) or
622	($tag->getTag()->getName()=='Exif IFD Pointer' or
623	$tag->getTag()->getName()=='MakerNote' or
624	$tag->getTag()->getName()=='GPS IFD Pointer'))
625	{
626	/*
627	* only tag responding to the filter are selected
628	* note the tags 'Exif IFD Pointer', 'MakerNote' & 'GPS IFD Pointer'
629	* are not declared as implemented (otherwise they are visible with
630	* the static 'getTagList' function) but must be selected even if
631	* filter says "implemented only"
632	*/
633	if($tag->getTag()->getLabel() instanceof IfdReader)
634	{
635	switch($tag->getTag()->getName())
636	{
637	case 'Exif IFD Pointer':
638	$exifKey2=Schemas::EXIF_EXIF;
639	break;
640	case 'MakerNote':
641	$exifKey2=Schemas::EXIF_MAKER.".".$tag->getTag()->getLabel()->getMaker();
642	break;
643	case 'GPS IFD Pointer':
644	$exifKey2=Schemas::EXIF_GPS;
645	break;
646	default:
647	$exifKey2=$exifKey;
648	break;
649	}
650	$this->loadIfdTags($tag->getTag()->getLabel(), $exifKey2);
651	}
652	else
653	{
654	$this->tags[$exifKey.".".$tag->getTag()->getName()]=$tag->getTag();
655	}
656	}
657	}
658	}
659
660	/**
661	* Used to load tags from an IPTc or XMP structure
662	*
663	* see IptcReader.class.php and XmpReader.class.php
664	*
665	* @Param Tag[] $ifd
666	* @Param String $tagKey
667	*
668	*/
669	private function loadTags($tags, $tagKey)
670	{
671	foreach($tags as $key => $tag)
672	{
673	if(self::filter($tag->isKnown(), $tag->isImplemented(), $this->options['filter']))
674	{
675	$this->tags[$tagKey.".".$tag->getName()]=$tag;
676	}
677	}
678	}
679
680	/**
681	* MagicTags are built with this function
682	*/
683	protected function processMagicTags()
684	{
685	$magicTags=new MagicTags();
686
687	foreach($magicTags->getTags() as $key => $val)
688	{
689	$tag=new Tag($key,0,$key);
690
691	for($i=0; $i<count($val['tagValues']); $i++)
692	{
693	$found=true;
694	preg_match_all('/{([a-z0-9:\.\s\/])(\[.\])?}/i', $val['tagValues'][$i], $returned, PREG_PATTERN_ORDER);
695	foreach($returned[1] as $testKey)
696	{
697	$found=$found & (array_key_exists($testKey, $this->tags) and $this->tags[$testKey]->getValue()!='');
698	}
699	if(count($returned[1])==0) $found=false;
700
701	if($found)
702	{
703	$returned=trim(
704	preg_replace_callback(
705	'/{([a-z0-9:\.\s\/\[\]]*)}/i',
706	Array(&$this, "processMagicTagsCB"),
707	$val['tagValues'][$i]
708	)
709	);
710
711	$returned=$this->processSpecialMagicTag($key, $returned);
712
713	$tag->setValue($returned);
714	$tag->setLabel($returned);
715	$tag->setKnown(true);
716	$tag->setImplemented($val['implemented']);
717	$tag->setTranslatable($val['translatable']);
718	$tag->setSchema(Schemas::MAGIC);
719
720	$i=count($val['tagValues']);
721	}
722	}
723
724	if($tag->isImplemented() and $found)
725	{
726	$this->tags["magic.".$key]=$tag;
727	}
728
729	unset($tag);
730	}
731	unset($magicTags);
732	}
733
734	/**
735	* this function is called by the processMagicTags to replace tagId by the
736	* tag values
737	*
738	* @param Array $matches : array[1] = the tagId
739	* @return String : the tag value
740	*/
741	protected function processMagicTagsCB($matches)
742	{
743	$label="";
744	preg_match_all('/([a-z0-9:\.\s\/])\[(.)\]/i', $matches[1], $result, PREG_PATTERN_ORDER);
745	if(count($result[0])>0)
746	{
747
748	if(array_key_exists($result[1][0], $this->tags))
749	{
750	$tag=$this->tags[$result[1][0]]->getLabel();
751
752	preg_match_all('/([a-z0-9:\.\s\/])\[(.)\]/i', $result[2][0], $result2, PREG_PATTERN_ORDER);
753
754	if(count($result2[0])>0)
755	{
756	if(array_key_exists($result2[2][0], $tag[$result2[1][0]] ))
757	$label=$tag[$result2[1][0]][$result2[2][0]];
758	}
759	else
760	{
761	if(array_key_exists($result[2][0], $tag))
762	$label=$tag[$result[2][0]];
763	}
764	}
765	}
766	else
767	{
768	if(array_key_exists($matches[1], $this->tags))
769	{
770	$label=$this->tags[$matches[1]]->getLabel();
771	}
772	}
773	if($label instanceof DateTime)
774	return($label->format("Y-m-d H:i:s"));
775
776	$label=XmpTags::getAltValue($label, L10n::getLanguage());
777
778	if(is_array($label))
779	{
780	return(implode(", ", $label));
781	}
782
783	return(trim($label));
784	}
785
786	/**
787	*
788	*
789	*/
790	protected function processSpecialMagicTag($key, $value)
791	{
792	switch($key)
793	{
794	case "GPS.LatitudeNum":
795	case "GPS.LongitudeNum":
796	preg_match_all('/(\d{1,3})°\s(\d{1,2})\'(?:\s(\d+(?:\.\d+)?)")?[\s\\|\.]*(N\|S\|E\|W)/i', $value, $result);
797	$num=(float)$result[1][0] + ((float) $result[2][0])/60;
798	if($result[3][0]!="") $num+= ((float) $result[3][0])/3600;
799	if($result[4][0]=="W" or $result[4][0]=="S") $num=-$num;
800	return($num);
801	case "Author.Keywords":
802	$list=array_flip(array_flip(explode(',', str_replace(array('/', '\|', ','), ',', $value))));
803	sort($list);
804	$tmp=array();
805	foreach($list as $key=>$val)
806	{
807	if(trim($val)!='') $tmp[]=trim($val);
808	}
809	return($tmp);
810	break;
811	default:
812	return($value);
813	}
814	}
815
816
817	/**
818	* used by the destructor to clean variables
819	*/
820	private function unsetAll()
821	{
822	unset($this->tags);
823	unset($this->jpeg);
824	unset($this->options);
825	}
826
827
828	} // class JpegMetaData
829
830	?>

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