1<?php
2/////////////////////////////////////////////////////////////////
3/// getID3() by James Heinrich <info@getid3.org>               //
4//  available at http://getid3.sourceforge.net                 //
5//            or http://www.getid3.org                         //
6//          also https://github.com/JamesHeinrich/getID3       //
7/////////////////////////////////////////////////////////////////
8// See readme.txt for more details                             //
9/////////////////////////////////////////////////////////////////
10//                                                             //
11// module.graphic.jpg.php                                      //
12// module for analyzing JPEG Image files                       //
13// dependencies: PHP compiled with --enable-exif (optional)    //
14//               module.tag.xmp.php (optional)                 //
15//                                                            ///
16/////////////////////////////////////////////////////////////////
17
18
19class getid3_jpg extends getid3_handler
20{
21
22
23	public function Analyze() {
24		$info = &$this->getid3->info;
25
26		$info['fileformat']                  = 'jpg';
27		$info['video']['dataformat']         = 'jpg';
28		$info['video']['lossless']           = false;
29		$info['video']['bits_per_sample']    = 24;
30		$info['video']['pixel_aspect_ratio'] = (float) 1;
31
32		$this->fseek($info['avdataoffset']);
33
34		$imageinfo = array();
35		//list($width, $height, $type) = getid3_lib::GetDataImageSize($this->fread($info['filesize']), $imageinfo);
36		list($width, $height, $type) = getimagesize($info['filenamepath'], $imageinfo); // http://www.getid3.org/phpBB3/viewtopic.php?t=1474
37
38
39		if (isset($imageinfo['APP13'])) {
40			// http://php.net/iptcparse
41			// http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/IPTC.html
42			$iptc_parsed = iptcparse($imageinfo['APP13']);
43			if (is_array($iptc_parsed)) {
44				foreach ($iptc_parsed as $iptc_key_raw => $iptc_values) {
45					list($iptc_record, $iptc_tagkey) = explode('#', $iptc_key_raw);
46					$iptc_tagkey = intval(ltrim($iptc_tagkey, '0'));
47					foreach ($iptc_values as $key => $value) {
48						$IPTCrecordName = $this->IPTCrecordName($iptc_record);
49						$IPTCrecordTagName = $this->IPTCrecordTagName($iptc_record, $iptc_tagkey);
50						if (isset($info['iptc']['comments'][$IPTCrecordName][$IPTCrecordTagName])) {
51							$info['iptc']['comments'][$IPTCrecordName][$IPTCrecordTagName][] = $value;
52						} else {
53							$info['iptc']['comments'][$IPTCrecordName][$IPTCrecordTagName] = array($value);
54						}
55					}
56				}
57			}
58		}
59
60		$returnOK = false;
61		switch ($type) {
62			case IMG_JPG:
63				$info['video']['resolution_x'] = $width;
64				$info['video']['resolution_y'] = $height;
65
66				if (isset($imageinfo['APP1'])) {
67					if (function_exists('exif_read_data')) {
68						if (substr($imageinfo['APP1'], 0, 4) == 'Exif') {
69//$this->warning('known issue: https://bugs.php.net/bug.php?id=62523');
70//return false;
71							set_error_handler(function($errno, $errstr, $errfile, $errline, array $errcontext) {
72								if (!(error_reporting() & $errno)) {
73									// error is not specified in the error_reporting setting, so we ignore it
74									return false;
75								}
76
77								$errcontext['info']['warning'][] = 'Error parsing EXIF data ('.$errstr.')';
78							});
79
80							$info['jpg']['exif'] = exif_read_data($info['filenamepath'], null, true, false);
81
82							restore_error_handler();
83						} else {
84							$this->warning('exif_read_data() cannot parse non-EXIF data in APP1 (expected "Exif", found "'.substr($imageinfo['APP1'], 0, 4).'")');
85						}
86					} else {
87						$this->warning('EXIF parsing only available when '.(GETID3_OS_ISWINDOWS ? 'php_exif.dll enabled' : 'compiled with --enable-exif'));
88					}
89				}
90				$returnOK = true;
91				break;
92
93			default:
94				break;
95		}
96
97
98		$cast_as_appropriate_keys = array('EXIF', 'IFD0', 'THUMBNAIL');
99		foreach ($cast_as_appropriate_keys as $exif_key) {
100			if (isset($info['jpg']['exif'][$exif_key])) {
101				foreach ($info['jpg']['exif'][$exif_key] as $key => $value) {
102					$info['jpg']['exif'][$exif_key][$key] = $this->CastAsAppropriate($value);
103				}
104			}
105		}
106
107
108		if (isset($info['jpg']['exif']['GPS'])) {
109
110			if (isset($info['jpg']['exif']['GPS']['GPSVersion'])) {
111				for ($i = 0; $i < 4; $i++) {
112					$version_subparts[$i] = ord(substr($info['jpg']['exif']['GPS']['GPSVersion'], $i, 1));
113				}
114				$info['jpg']['exif']['GPS']['computed']['version'] = 'v'.implode('.', $version_subparts);
115			}
116
117			if (isset($info['jpg']['exif']['GPS']['GPSDateStamp'])) {
118				$explodedGPSDateStamp = explode(':', $info['jpg']['exif']['GPS']['GPSDateStamp']);
119				$computed_time[5] = (isset($explodedGPSDateStamp[0]) ? $explodedGPSDateStamp[0] : '');
120				$computed_time[3] = (isset($explodedGPSDateStamp[1]) ? $explodedGPSDateStamp[1] : '');
121				$computed_time[4] = (isset($explodedGPSDateStamp[2]) ? $explodedGPSDateStamp[2] : '');
122
123				$computed_time = array(0=>0, 1=>0, 2=>0, 3=>0, 4=>0, 5=>0);
124				if (isset($info['jpg']['exif']['GPS']['GPSTimeStamp']) && is_array($info['jpg']['exif']['GPS']['GPSTimeStamp'])) {
125					foreach ($info['jpg']['exif']['GPS']['GPSTimeStamp'] as $key => $value) {
126						$computed_time[$key] = getid3_lib::DecimalizeFraction($value);
127					}
128				}
129				$info['jpg']['exif']['GPS']['computed']['timestamp'] = gmmktime($computed_time[0], $computed_time[1], $computed_time[2], $computed_time[3], $computed_time[4], $computed_time[5]);
130			}
131
132			if (isset($info['jpg']['exif']['GPS']['GPSLatitude']) && is_array($info['jpg']['exif']['GPS']['GPSLatitude'])) {
133				$direction_multiplier = ((isset($info['jpg']['exif']['GPS']['GPSLatitudeRef']) && ($info['jpg']['exif']['GPS']['GPSLatitudeRef'] == 'S')) ? -1 : 1);
134				foreach ($info['jpg']['exif']['GPS']['GPSLatitude'] as $key => $value) {
135					$computed_latitude[$key] = getid3_lib::DecimalizeFraction($value);
136				}
137				$info['jpg']['exif']['GPS']['computed']['latitude'] = $direction_multiplier * ($computed_latitude[0] + ($computed_latitude[1] / 60) + ($computed_latitude[2] / 3600));
138			}
139
140			if (isset($info['jpg']['exif']['GPS']['GPSLongitude']) && is_array($info['jpg']['exif']['GPS']['GPSLongitude'])) {
141				$direction_multiplier = ((isset($info['jpg']['exif']['GPS']['GPSLongitudeRef']) && ($info['jpg']['exif']['GPS']['GPSLongitudeRef'] == 'W')) ? -1 : 1);
142				foreach ($info['jpg']['exif']['GPS']['GPSLongitude'] as $key => $value) {
143					$computed_longitude[$key] = getid3_lib::DecimalizeFraction($value);
144				}
145				$info['jpg']['exif']['GPS']['computed']['longitude'] = $direction_multiplier * ($computed_longitude[0] + ($computed_longitude[1] / 60) + ($computed_longitude[2] / 3600));
146			}
147			if (isset($info['jpg']['exif']['GPS']['GPSAltitudeRef'])) {
148				$info['jpg']['exif']['GPS']['GPSAltitudeRef'] = ord($info['jpg']['exif']['GPS']['GPSAltitudeRef']); // 0 = above sea level; 1 = below sea level
149			}
150			if (isset($info['jpg']['exif']['GPS']['GPSAltitude'])) {
151				$direction_multiplier = (!empty($info['jpg']['exif']['GPS']['GPSAltitudeRef']) ? -1 : 1);           // 0 = above sea level; 1 = below sea level
152				$info['jpg']['exif']['GPS']['computed']['altitude'] = $direction_multiplier * getid3_lib::DecimalizeFraction($info['jpg']['exif']['GPS']['GPSAltitude']);
153			}
154
155		}
156
157
158		getid3_lib::IncludeDependency(GETID3_INCLUDEPATH.'module.tag.xmp.php', __FILE__, true);
159		if (isset($info['filenamepath'])) {
160			$image_xmp = new Image_XMP($info['filenamepath']);
161			$xmp_raw = $image_xmp->getAllTags();
162			foreach ($xmp_raw as $key => $value) {
163				if (strpos($key, ':')) {
164					list($subsection, $tagname) = explode(':', $key);
165					$info['xmp'][$subsection][$tagname] = $this->CastAsAppropriate($value);
166				} else {
167					$this->warning('XMP: expecting "<subsection>:<tagname>", found "'.$key.'"');
168				}
169			}
170		}
171
172		if (!$returnOK) {
173			unset($info['fileformat']);
174			return false;
175		}
176		return true;
177	}
178
179
180	public function CastAsAppropriate($value) {
181		if (is_array($value)) {
182			return $value;
183		} elseif (preg_match('#^[0-9]+/[0-9]+$#', $value)) {
184			return getid3_lib::DecimalizeFraction($value);
185		} elseif (preg_match('#^[0-9]+$#', $value)) {
186			return getid3_lib::CastAsInt($value);
187		} elseif (preg_match('#^[0-9\.]+$#', $value)) {
188			return (float) $value;
189		}
190		return $value;
191	}
192
193
194	public function IPTCrecordName($iptc_record) {
195		// http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/IPTC.html
196		static $IPTCrecordName = array();
197		if (empty($IPTCrecordName)) {
198			$IPTCrecordName = array(
199				1 => 'IPTCEnvelope',
200				2 => 'IPTCApplication',
201				3 => 'IPTCNewsPhoto',
202				7 => 'IPTCPreObjectData',
203				8 => 'IPTCObjectData',
204				9 => 'IPTCPostObjectData',
205			);
206		}
207		return (isset($IPTCrecordName[$iptc_record]) ? $IPTCrecordName[$iptc_record] : '');
208	}
209
210
211	public function IPTCrecordTagName($iptc_record, $iptc_tagkey) {
212		// http://www.sno.phy.queensu.ca/~phil/exiftool/TagNames/IPTC.html
213		static $IPTCrecordTagName = array();
214		if (empty($IPTCrecordTagName)) {
215			$IPTCrecordTagName = array(
216				1 => array( // IPTC EnvelopeRecord Tags
217					0   => 'EnvelopeRecordVersion',
218					5   => 'Destination',
219					20  => 'FileFormat',
220					22  => 'FileVersion',
221					30  => 'ServiceIdentifier',
222					40  => 'EnvelopeNumber',
223					50  => 'ProductID',
224					60  => 'EnvelopePriority',
225					70  => 'DateSent',
226					80  => 'TimeSent',
227					90  => 'CodedCharacterSet',
228					100 => 'UniqueObjectName',
229					120 => 'ARMIdentifier',
230					122 => 'ARMVersion',
231				),
232				2 => array( // IPTC ApplicationRecord Tags
233					0   => 'ApplicationRecordVersion',
234					3   => 'ObjectTypeReference',
235					4   => 'ObjectAttributeReference',
236					5   => 'ObjectName',
237					7   => 'EditStatus',
238					8   => 'EditorialUpdate',
239					10  => 'Urgency',
240					12  => 'SubjectReference',
241					15  => 'Category',
242					20  => 'SupplementalCategories',
243					22  => 'FixtureIdentifier',
244					25  => 'Keywords',
245					26  => 'ContentLocationCode',
246					27  => 'ContentLocationName',
247					30  => 'ReleaseDate',
248					35  => 'ReleaseTime',
249					37  => 'ExpirationDate',
250					38  => 'ExpirationTime',
251					40  => 'SpecialInstructions',
252					42  => 'ActionAdvised',
253					45  => 'ReferenceService',
254					47  => 'ReferenceDate',
255					50  => 'ReferenceNumber',
256					55  => 'DateCreated',
257					60  => 'TimeCreated',
258					62  => 'DigitalCreationDate',
259					63  => 'DigitalCreationTime',
260					65  => 'OriginatingProgram',
261					70  => 'ProgramVersion',
262					75  => 'ObjectCycle',
263					80  => 'By-line',
264					85  => 'By-lineTitle',
265					90  => 'City',
266					92  => 'Sub-location',
267					95  => 'Province-State',
268					100 => 'Country-PrimaryLocationCode',
269					101 => 'Country-PrimaryLocationName',
270					103 => 'OriginalTransmissionReference',
271					105 => 'Headline',
272					110 => 'Credit',
273					115 => 'Source',
274					116 => 'CopyrightNotice',
275					118 => 'Contact',
276					120 => 'Caption-Abstract',
277					121 => 'LocalCaption',
278					122 => 'Writer-Editor',
279					125 => 'RasterizedCaption',
280					130 => 'ImageType',
281					131 => 'ImageOrientation',
282					135 => 'LanguageIdentifier',
283					150 => 'AudioType',
284					151 => 'AudioSamplingRate',
285					152 => 'AudioSamplingResolution',
286					153 => 'AudioDuration',
287					154 => 'AudioOutcue',
288					184 => 'JobID',
289					185 => 'MasterDocumentID',
290					186 => 'ShortDocumentID',
291					187 => 'UniqueDocumentID',
292					188 => 'OwnerID',
293					200 => 'ObjectPreviewFileFormat',
294					201 => 'ObjectPreviewFileVersion',
295					202 => 'ObjectPreviewData',
296					221 => 'Prefs',
297					225 => 'ClassifyState',
298					228 => 'SimilarityIndex',
299					230 => 'DocumentNotes',
300					231 => 'DocumentHistory',
301					232 => 'ExifCameraInfo',
302				),
303				3 => array( // IPTC NewsPhoto Tags
304					0   => 'NewsPhotoVersion',
305					10  => 'IPTCPictureNumber',
306					20  => 'IPTCImageWidth',
307					30  => 'IPTCImageHeight',
308					40  => 'IPTCPixelWidth',
309					50  => 'IPTCPixelHeight',
310					55  => 'SupplementalType',
311					60  => 'ColorRepresentation',
312					64  => 'InterchangeColorSpace',
313					65  => 'ColorSequence',
314					66  => 'ICC_Profile',
315					70  => 'ColorCalibrationMatrix',
316					80  => 'LookupTable',
317					84  => 'NumIndexEntries',
318					85  => 'ColorPalette',
319					86  => 'IPTCBitsPerSample',
320					90  => 'SampleStructure',
321					100 => 'ScanningDirection',
322					102 => 'IPTCImageRotation',
323					110 => 'DataCompressionMethod',
324					120 => 'QuantizationMethod',
325					125 => 'EndPoints',
326					130 => 'ExcursionTolerance',
327					135 => 'BitsPerComponent',
328					140 => 'MaximumDensityRange',
329					145 => 'GammaCompensatedValue',
330				),
331				7 => array( // IPTC PreObjectData Tags
332					10  => 'SizeMode',
333					20  => 'MaxSubfileSize',
334					90  => 'ObjectSizeAnnounced',
335					95  => 'MaximumObjectSize',
336				),
337				8 => array( // IPTC ObjectData Tags
338					10  => 'SubFile',
339				),
340				9 => array( // IPTC PostObjectData Tags
341					10  => 'ConfirmedObjectSize',
342				),
343			);
344
345		}
346		return (isset($IPTCrecordTagName[$iptc_record][$iptc_tagkey]) ? $IPTCrecordTagName[$iptc_record][$iptc_tagkey] : $iptc_tagkey);
347	}
348
349}
350