MediaWiki REL1_34
Exif.php
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1<?php
32class Exif {
34 const BYTE = 1;
35
39 const ASCII = 2;
40
42 const SHORT = 3;
43
45 const LONG = 4;
46
50 const RATIONAL = 5;
51
53 const SHORT_OR_LONG = 6;
54
56 const UNDEFINED = 7;
57
59 const SLONG = 9;
60
64 const SRATIONAL = 10;
65
67 const IGNORE = -1;
68
73 private $mExifTags;
74
77
83
85 private $file;
86
88 private $basename;
89
91 private $log = false;
92
96 private $byteOrder;
97
108 function __construct( $file, $byteOrder = '' ) {
117 $this->mExifTags = [
118 # TIFF Rev. 6.0 Attribute Information (p22)
119 'IFD0' => [
120 # Tags relating to image structure
121 'ImageWidth' => self::SHORT_OR_LONG, # Image width
122 'ImageLength' => self::SHORT_OR_LONG, # Image height
123 'BitsPerSample' => [ self::SHORT, 3 ], # Number of bits per component
124 # "When a primary image is JPEG compressed, this designation is not"
125 # "necessary and is omitted." (p23)
126 'Compression' => self::SHORT, # Compression scheme #p23
127 'PhotometricInterpretation' => self::SHORT, # Pixel composition #p23
128 'Orientation' => self::SHORT, # Orientation of image #p24
129 'SamplesPerPixel' => self::SHORT, # Number of components
130 'PlanarConfiguration' => self::SHORT, # Image data arrangement #p24
131 'YCbCrSubSampling' => [ self::SHORT, 2 ], # Subsampling ratio of Y to C #p24
132 'YCbCrPositioning' => self::SHORT, # Y and C positioning #p24-25
133 'XResolution' => self::RATIONAL, # Image resolution in width direction
134 'YResolution' => self::RATIONAL, # Image resolution in height direction
135 'ResolutionUnit' => self::SHORT, # Unit of X and Y resolution #(p26)
136
137 # Tags relating to recording offset
138 'StripOffsets' => self::SHORT_OR_LONG, # Image data location
139 'RowsPerStrip' => self::SHORT_OR_LONG, # Number of rows per strip
140 'StripByteCounts' => self::SHORT_OR_LONG, # Bytes per compressed strip
141 'JPEGInterchangeFormat' => self::SHORT_OR_LONG, # Offset to JPEG SOI
142 'JPEGInterchangeFormatLength' => self::SHORT_OR_LONG, # Bytes of JPEG data
143
144 # Tags relating to image data characteristics
145 'TransferFunction' => self::IGNORE, # Transfer function
146 'WhitePoint' => [ self::RATIONAL, 2 ], # White point chromaticity
147 'PrimaryChromaticities' => [ self::RATIONAL, 6 ], # Chromaticities of primarities
148 # Color space transformation matrix coefficients #p27
149 'YCbCrCoefficients' => [ self::RATIONAL, 3 ],
150 'ReferenceBlackWhite' => [ self::RATIONAL, 6 ], # Pair of black and white reference values
151
152 # Other tags
153 'DateTime' => self::ASCII, # File change date and time
154 'ImageDescription' => self::ASCII, # Image title
155 'Make' => self::ASCII, # Image input equipment manufacturer
156 'Model' => self::ASCII, # Image input equipment model
157 'Software' => self::ASCII, # Software used
158 'Artist' => self::ASCII, # Person who created the image
159 'Copyright' => self::ASCII, # Copyright holder
160 ],
161
162 # Exif IFD Attribute Information (p30-31)
163 'EXIF' => [
164 # @todo NOTE: Nonexistence of this field is taken to mean nonconformance
165 # to the Exif 2.1 AND 2.2 standards
166 'ExifVersion' => self::UNDEFINED, # Exif version
167 'FlashPixVersion' => self::UNDEFINED, # Supported Flashpix version #p32
168
169 # Tags relating to Image Data Characteristics
170 'ColorSpace' => self::SHORT, # Color space information #p32
171
172 # Tags relating to image configuration
173 'ComponentsConfiguration' => self::UNDEFINED, # Meaning of each component #p33
174 'CompressedBitsPerPixel' => self::RATIONAL, # Image compression mode
175 'PixelYDimension' => self::SHORT_OR_LONG, # Valid image height
176 'PixelXDimension' => self::SHORT_OR_LONG, # Valid image width
177
178 # Tags relating to related user information
179 'MakerNote' => self::IGNORE, # Manufacturer notes
180 'UserComment' => self::UNDEFINED, # User comments #p34
181
182 # Tags relating to related file information
183 'RelatedSoundFile' => self::ASCII, # Related audio file
184
185 # Tags relating to date and time
186 'DateTimeOriginal' => self::ASCII, # Date and time of original data generation #p36
187 'DateTimeDigitized' => self::ASCII, # Date and time of original data generation
188 'SubSecTime' => self::ASCII, # DateTime subseconds
189 'SubSecTimeOriginal' => self::ASCII, # DateTimeOriginal subseconds
190 'SubSecTimeDigitized' => self::ASCII, # DateTimeDigitized subseconds
191
192 # Tags relating to picture-taking conditions (p31)
193 'ExposureTime' => self::RATIONAL, # Exposure time
194 'FNumber' => self::RATIONAL, # F Number
195 'ExposureProgram' => self::SHORT, # Exposure Program #p38
196 'SpectralSensitivity' => self::ASCII, # Spectral sensitivity
197 'ISOSpeedRatings' => self::SHORT, # ISO speed rating
198 'OECF' => self::IGNORE,
199 # Optoelectronic conversion factor. Note: We don't have support for this atm.
200 'ShutterSpeedValue' => self::SRATIONAL, # Shutter speed
201 'ApertureValue' => self::RATIONAL, # Aperture
202 'BrightnessValue' => self::SRATIONAL, # Brightness
203 'ExposureBiasValue' => self::SRATIONAL, # Exposure bias
204 'MaxApertureValue' => self::RATIONAL, # Maximum land aperture
205 'SubjectDistance' => self::RATIONAL, # Subject distance
206 'MeteringMode' => self::SHORT, # Metering mode #p40
207 'LightSource' => self::SHORT, # Light source #p40-41
208 'Flash' => self::SHORT, # Flash #p41-42
209 'FocalLength' => self::RATIONAL, # Lens focal length
210 'SubjectArea' => [ self::SHORT, 4 ], # Subject area
211 'FlashEnergy' => self::RATIONAL, # Flash energy
212 'SpatialFrequencyResponse' => self::IGNORE, # Spatial frequency response. Not supported atm.
213 'FocalPlaneXResolution' => self::RATIONAL, # Focal plane X resolution
214 'FocalPlaneYResolution' => self::RATIONAL, # Focal plane Y resolution
215 'FocalPlaneResolutionUnit' => self::SHORT, # Focal plane resolution unit #p46
216 'SubjectLocation' => [ self::SHORT, 2 ], # Subject location
217 'ExposureIndex' => self::RATIONAL, # Exposure index
218 'SensingMethod' => self::SHORT, # Sensing method #p46
219 'FileSource' => self::UNDEFINED, # File source #p47
220 'SceneType' => self::UNDEFINED, # Scene type #p47
221 'CFAPattern' => self::IGNORE, # CFA pattern. not supported atm.
222 'CustomRendered' => self::SHORT, # Custom image processing #p48
223 'ExposureMode' => self::SHORT, # Exposure mode #p48
224 'WhiteBalance' => self::SHORT, # White Balance #p49
225 'DigitalZoomRatio' => self::RATIONAL, # Digital zoom ration
226 'FocalLengthIn35mmFilm' => self::SHORT, # Focal length in 35 mm film
227 'SceneCaptureType' => self::SHORT, # Scene capture type #p49
228 'GainControl' => self::SHORT, # Scene control #p49-50
229 'Contrast' => self::SHORT, # Contrast #p50
230 'Saturation' => self::SHORT, # Saturation #p50
231 'Sharpness' => self::SHORT, # Sharpness #p50
232 'DeviceSettingDescription' => self::IGNORE,
233 # Device settings description. This could maybe be supported. Need to find an
234 # example file that uses this to see if it has stuff of interest in it.
235 'SubjectDistanceRange' => self::SHORT, # Subject distance range #p51
236
237 'ImageUniqueID' => self::ASCII, # Unique image ID
238 ],
239
240 # GPS Attribute Information (p52)
241 'GPS' => [
242 'GPSVersion' => self::UNDEFINED,
243 # Should be an array of 4 Exif::BYTE's. However php treats it as an undefined
244 # Note exif standard calls this GPSVersionID, but php doesn't like the id suffix
245 'GPSLatitudeRef' => self::ASCII, # North or South Latitude #p52-53
246 'GPSLatitude' => [ self::RATIONAL, 3 ], # Latitude
247 'GPSLongitudeRef' => self::ASCII, # East or West Longitude #p53
248 'GPSLongitude' => [ self::RATIONAL, 3 ], # Longitude
249 'GPSAltitudeRef' => self::UNDEFINED,
250 # Altitude reference. Note, the exif standard says this should be an EXIF::Byte,
251 # but php seems to disagree.
252 'GPSAltitude' => self::RATIONAL, # Altitude
253 'GPSTimeStamp' => [ self::RATIONAL, 3 ], # GPS time (atomic clock)
254 'GPSSatellites' => self::ASCII, # Satellites used for measurement
255 'GPSStatus' => self::ASCII, # Receiver status #p54
256 'GPSMeasureMode' => self::ASCII, # Measurement mode #p54-55
257 'GPSDOP' => self::RATIONAL, # Measurement precision
258 'GPSSpeedRef' => self::ASCII, # Speed unit #p55
259 'GPSSpeed' => self::RATIONAL, # Speed of GPS receiver
260 'GPSTrackRef' => self::ASCII, # Reference for direction of movement #p55
261 'GPSTrack' => self::RATIONAL, # Direction of movement
262 'GPSImgDirectionRef' => self::ASCII, # Reference for direction of image #p56
263 'GPSImgDirection' => self::RATIONAL, # Direction of image
264 'GPSMapDatum' => self::ASCII, # Geodetic survey data used
265 'GPSDestLatitudeRef' => self::ASCII, # Reference for latitude of destination #p56
266 'GPSDestLatitude' => [ self::RATIONAL, 3 ], # Latitude destination
267 'GPSDestLongitudeRef' => self::ASCII, # Reference for longitude of destination #p57
268 'GPSDestLongitude' => [ self::RATIONAL, 3 ], # Longitude of destination
269 'GPSDestBearingRef' => self::ASCII, # Reference for bearing of destination #p57
270 'GPSDestBearing' => self::RATIONAL, # Bearing of destination
271 'GPSDestDistanceRef' => self::ASCII, # Reference for distance to destination #p57-58
272 'GPSDestDistance' => self::RATIONAL, # Distance to destination
273 'GPSProcessingMethod' => self::UNDEFINED, # Name of GPS processing method
274 'GPSAreaInformation' => self::UNDEFINED, # Name of GPS area
275 'GPSDateStamp' => self::ASCII, # GPS date
276 'GPSDifferential' => self::SHORT, # GPS differential correction
277 ],
278 ];
279
280 $this->file = $file;
281 $this->basename = wfBaseName( $this->file );
282 if ( $byteOrder === 'BE' || $byteOrder === 'LE' ) {
283 $this->byteOrder = $byteOrder;
284 } else {
285 // Only give a warning for b/c, since originally we didn't
286 // require this. The number of things affected by this is
287 // rather small.
288 wfWarn( 'Exif class did not have byte order specified. ' .
289 'Some properties may be decoded incorrectly.' );
290 $this->byteOrder = 'BE'; // BE seems about twice as popular as LE in jpg's.
291 }
292
293 $this->debugFile( __FUNCTION__, true );
294 if ( function_exists( 'exif_read_data' ) ) {
295 Wikimedia\suppressWarnings();
296 $data = exif_read_data( $this->file, 0, true );
297 Wikimedia\restoreWarnings();
298 } else {
299 throw new MWException( "Internal error: exif_read_data not present. " .
300 "\$wgShowEXIF may be incorrectly set or not checked by an extension." );
301 }
307 $this->mRawExifData = $data ?: [];
308 $this->makeFilteredData();
309 $this->collapseData();
310 $this->debugFile( __FUNCTION__, false );
311 }
312
316 function makeFilteredData() {
317 $this->mFilteredExifData = [];
318
319 foreach ( array_keys( $this->mRawExifData ) as $section ) {
320 if ( !array_key_exists( $section, $this->mExifTags ) ) {
321 $this->debug( $section, __FUNCTION__, "'$section' is not a valid Exif section" );
322 continue;
323 }
324
325 foreach ( array_keys( $this->mRawExifData[$section] ) as $tag ) {
326 if ( !array_key_exists( $tag, $this->mExifTags[$section] ) ) {
327 $this->debug( $tag, __FUNCTION__, "'$tag' is not a valid tag in '$section'" );
328 continue;
329 }
330
331 $this->mFilteredExifData[$tag] = $this->mRawExifData[$section][$tag];
332 // This is ok, as the tags in the different sections do not conflict.
333 // except in computed and thumbnail section, which we don't use.
334
335 $value = $this->mRawExifData[$section][$tag];
336 if ( !$this->validate( $section, $tag, $value ) ) {
337 $this->debug( $value, __FUNCTION__, "'$tag' contained invalid data" );
338 unset( $this->mFilteredExifData[$tag] );
339 }
340 }
341 }
342 }
343
362 function collapseData() {
363 $this->exifGPStoNumber( 'GPSLatitude' );
364 $this->exifGPStoNumber( 'GPSDestLatitude' );
365 $this->exifGPStoNumber( 'GPSLongitude' );
366 $this->exifGPStoNumber( 'GPSDestLongitude' );
367
368 if ( isset( $this->mFilteredExifData['GPSAltitude'] )
369 && isset( $this->mFilteredExifData['GPSAltitudeRef'] )
370 ) {
371 // We know altitude data is a <num>/<denom> from the validation
372 // functions ran earlier. But multiplying such a string by -1
373 // doesn't work well, so convert.
374 list( $num, $denom ) = explode( '/', $this->mFilteredExifData['GPSAltitude'] );
375 $this->mFilteredExifData['GPSAltitude'] = $num / $denom;
376
377 if ( $this->mFilteredExifData['GPSAltitudeRef'] === "\1" ) {
378 $this->mFilteredExifData['GPSAltitude'] *= -1;
379 }
380 unset( $this->mFilteredExifData['GPSAltitudeRef'] );
381 }
382
383 $this->exifPropToOrd( 'FileSource' );
384 $this->exifPropToOrd( 'SceneType' );
385
386 $this->charCodeString( 'UserComment' );
387 $this->charCodeString( 'GPSProcessingMethod' );
388 $this->charCodeString( 'GPSAreaInformation' );
389
390 // ComponentsConfiguration should really be an array instead of a string...
391 // This turns a string of binary numbers into an array of numbers.
392
393 if ( isset( $this->mFilteredExifData['ComponentsConfiguration'] ) ) {
394 $val = $this->mFilteredExifData['ComponentsConfiguration'];
395 $ccVals = [];
396
397 $strLen = strlen( $val );
398 for ( $i = 0; $i < $strLen; $i++ ) {
399 $ccVals[$i] = ord( substr( $val, $i, 1 ) );
400 }
401 $ccVals['_type'] = 'ol'; // this is for formatting later.
402 $this->mFilteredExifData['ComponentsConfiguration'] = $ccVals;
403 }
404
405 // GPSVersion(ID) is treated as the wrong type by php exif support.
406 // Go through each byte turning it into a version string.
407 // For example: "\x02\x02\x00\x00" -> "2.2.0.0"
408
409 // Also change exif tag name from GPSVersion (what php exif thinks it is)
410 // to GPSVersionID (what the exif standard thinks it is).
411
412 if ( isset( $this->mFilteredExifData['GPSVersion'] ) ) {
413 $val = $this->mFilteredExifData['GPSVersion'];
414 $newVal = '';
415
416 $strLen = strlen( $val );
417 for ( $i = 0; $i < $strLen; $i++ ) {
418 if ( $i !== 0 ) {
419 $newVal .= '.';
420 }
421 $newVal .= ord( substr( $val, $i, 1 ) );
422 }
423
424 if ( $this->byteOrder === 'LE' ) {
425 // Need to reverse the string
426 $newVal2 = '';
427 for ( $i = strlen( $newVal ) - 1; $i >= 0; $i-- ) {
428 $newVal2 .= substr( $newVal, $i, 1 );
429 }
430 $this->mFilteredExifData['GPSVersionID'] = $newVal2;
431 } else {
432 $this->mFilteredExifData['GPSVersionID'] = $newVal;
433 }
434 unset( $this->mFilteredExifData['GPSVersion'] );
435 }
436 }
437
444 private function charCodeString( $prop ) {
445 if ( isset( $this->mFilteredExifData[$prop] ) ) {
446 if ( strlen( $this->mFilteredExifData[$prop] ) <= 8 ) {
447 // invalid. Must be at least 9 bytes long.
448
449 $this->debug( $this->mFilteredExifData[$prop], __FUNCTION__, false );
450 unset( $this->mFilteredExifData[$prop] );
451
452 return;
453 }
454 $charCode = substr( $this->mFilteredExifData[$prop], 0, 8 );
455 $val = substr( $this->mFilteredExifData[$prop], 8 );
456
457 switch ( $charCode ) {
458 case "JIS\x00\x00\x00\x00\x00":
459 $charset = "Shift-JIS";
460 break;
461 case "UNICODE\x00":
462 $charset = "UTF-16" . $this->byteOrder;
463 break;
464 default: // ascii or undefined.
465 $charset = "";
466 break;
467 }
468 if ( $charset ) {
469 Wikimedia\suppressWarnings();
470 $val = iconv( $charset, 'UTF-8//IGNORE', $val );
471 Wikimedia\restoreWarnings();
472 } else {
473 // if valid utf-8, assume that, otherwise assume windows-1252
474 $valCopy = $val;
475 UtfNormal\Validator::quickIsNFCVerify( $valCopy ); // validates $valCopy.
476 if ( $valCopy !== $val ) {
477 Wikimedia\suppressWarnings();
478 $val = iconv( 'Windows-1252', 'UTF-8//IGNORE', $val );
479 Wikimedia\restoreWarnings();
480 }
481 }
482
483 // trim and check to make sure not only whitespace.
484 $val = trim( $val );
485 if ( strlen( $val ) === 0 ) {
486 // only whitespace.
487 $this->debug( $this->mFilteredExifData[$prop], __FUNCTION__, "$prop: Is only whitespace" );
488 unset( $this->mFilteredExifData[$prop] );
489
490 return;
491 }
492
493 // all's good.
494 $this->mFilteredExifData[$prop] = $val;
495 }
496 }
497
504 private function exifPropToOrd( $prop ) {
505 if ( isset( $this->mFilteredExifData[$prop] ) ) {
506 $this->mFilteredExifData[$prop] = ord( $this->mFilteredExifData[$prop] );
507 }
508 }
509
515 private function exifGPStoNumber( $prop ) {
516 $loc =& $this->mFilteredExifData[$prop];
517 $dir =& $this->mFilteredExifData[$prop . 'Ref'];
518 $res = false;
519
520 if ( isset( $loc ) && isset( $dir )
521 && ( $dir === 'N' || $dir === 'S' || $dir === 'E' || $dir === 'W' )
522 ) {
523 list( $num, $denom ) = explode( '/', $loc[0] );
524 $res = $num / $denom;
525 list( $num, $denom ) = explode( '/', $loc[1] );
526 $res += ( $num / $denom ) * ( 1 / 60 );
527 list( $num, $denom ) = explode( '/', $loc[2] );
528 $res += ( $num / $denom ) * ( 1 / 3600 );
529
530 if ( $dir === 'S' || $dir === 'W' ) {
531 $res *= -1; // make negative
532 }
533 }
534
535 // update the exif records.
536
537 if ( $res !== false ) { // using !== as $res could potentially be 0
538 $this->mFilteredExifData[$prop] = $res;
539 unset( $this->mFilteredExifData[$prop . 'Ref'] );
540 } else { // if invalid
541 unset( $this->mFilteredExifData[$prop] );
542 unset( $this->mFilteredExifData[$prop . 'Ref'] );
543 }
544 }
545
556 function getData() {
557 return $this->mRawExifData;
558 }
559
564 function getFilteredData() {
566 }
567
582 public static function version() {
583 return 2; // We don't need no bloddy constants!
584 }
585
592 private function isByte( $in ) {
593 if ( !is_array( $in ) && sprintf( '%d', $in ) == $in && $in >= 0 && $in <= 255 ) {
594 $this->debug( $in, __FUNCTION__, true );
595
596 return true;
597 } else {
598 $this->debug( $in, __FUNCTION__, false );
599
600 return false;
601 }
602 }
603
608 private function isASCII( $in ) {
609 if ( is_array( $in ) ) {
610 return false;
611 }
612
613 if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) {
614 $this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' );
615
616 return false;
617 }
618
619 if ( preg_match( '/^\s*$/', $in ) ) {
620 $this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' );
621
622 return false;
623 }
624
625 return true;
626 }
627
632 private function isShort( $in ) {
633 if ( !is_array( $in ) && sprintf( '%d', $in ) == $in && $in >= 0 && $in <= 65536 ) {
634 $this->debug( $in, __FUNCTION__, true );
635
636 return true;
637 } else {
638 $this->debug( $in, __FUNCTION__, false );
639
640 return false;
641 }
642 }
643
648 private function isLong( $in ) {
649 if ( !is_array( $in ) && sprintf( '%d', $in ) == $in && $in >= 0 && $in <= 4294967296 ) {
650 $this->debug( $in, __FUNCTION__, true );
651
652 return true;
653 } else {
654 $this->debug( $in, __FUNCTION__, false );
655
656 return false;
657 }
658 }
659
664 private function isRational( $in ) {
665 $m = [];
666
667 # Avoid division by zero
668 if ( !is_array( $in )
669 && preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m )
670 ) {
671 return $this->isLong( $m[1] ) && $this->isLong( $m[2] );
672 } else {
673 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
674
675 return false;
676 }
677 }
678
683 private function isUndefined( $in ) {
684 $this->debug( $in, __FUNCTION__, true );
685
686 return true;
687 }
688
693 private function isSlong( $in ) {
694 if ( $this->isLong( abs( $in ) ) ) {
695 $this->debug( $in, __FUNCTION__, true );
696
697 return true;
698 } else {
699 $this->debug( $in, __FUNCTION__, false );
700
701 return false;
702 }
703 }
704
709 private function isSrational( $in ) {
710 $m = [];
711
712 # Avoid division by zero
713 if ( !is_array( $in ) &&
714 preg_match( '/^(-?\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m )
715 ) {
716 return $this->isSlong( $m[0] ) && $this->isSlong( $m[1] );
717 } else {
718 $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
719
720 return false;
721 }
722 }
723
735 private function validate( $section, $tag, $val, $recursive = false ) {
736 $debug = "tag is '$tag'";
737 $etype = $this->mExifTags[$section][$tag];
738 $ecount = 1;
739 if ( is_array( $etype ) ) {
740 list( $etype, $ecount ) = $etype;
741 if ( $recursive ) {
742 $ecount = 1; // checking individual elements
743 }
744 }
745
746 $count = 1;
747 if ( is_array( $val ) ) {
748 $count = count( $val );
749 if ( $ecount != $count ) {
750 $this->debug( $val, __FUNCTION__, "Expected $ecount elements for $tag but got $count" );
751 return false;
752 }
753 }
754 // If there are multiple values, recursively validate each of them.
755 if ( $count > 1 ) {
756 foreach ( $val as $v ) {
757 if ( !$this->validate( $section, $tag, $v, true ) ) {
758 return false;
759 }
760 }
761
762 return true;
763 }
764 // Does not work if not typecast
765 switch ( (string)$etype ) {
766 case (string)self::BYTE:
767 $this->debug( $val, __FUNCTION__, $debug );
768
769 return $this->isByte( $val );
770 case (string)self::ASCII:
771 $this->debug( $val, __FUNCTION__, $debug );
772
773 return $this->isASCII( $val );
774 case (string)self::SHORT:
775 $this->debug( $val, __FUNCTION__, $debug );
776
777 return $this->isShort( $val );
778 case (string)self::LONG:
779 $this->debug( $val, __FUNCTION__, $debug );
780
781 return $this->isLong( $val );
782 case (string)self::RATIONAL:
783 $this->debug( $val, __FUNCTION__, $debug );
784
785 return $this->isRational( $val );
786 case (string)self::SHORT_OR_LONG:
787 $this->debug( $val, __FUNCTION__, $debug );
788
789 return $this->isShort( $val ) || $this->isLong( $val );
790 case (string)self::UNDEFINED:
791 $this->debug( $val, __FUNCTION__, $debug );
792
793 return $this->isUndefined( $val );
794 case (string)self::SLONG:
795 $this->debug( $val, __FUNCTION__, $debug );
796
797 return $this->isSlong( $val );
798 case (string)self::SRATIONAL:
799 $this->debug( $val, __FUNCTION__, $debug );
800
801 return $this->isSrational( $val );
802 case (string)self::IGNORE:
803 $this->debug( $val, __FUNCTION__, $debug );
804
805 return false;
806 default:
807 $this->debug( $val, __FUNCTION__, "The tag '$tag' is unknown" );
808
809 return false;
810 }
811 }
812
820 private function debug( $in, $fname, $action = null ) {
821 if ( !$this->log ) {
822 return;
823 }
824 $type = gettype( $in );
825 $class = ucfirst( __CLASS__ );
826 if ( is_array( $in ) ) {
827 $in = print_r( $in, true );
828 }
829
830 if ( $action === true ) {
831 wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)" );
832 } elseif ( $action === false ) {
833 wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)" );
834 } elseif ( $action === null ) {
835 wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)" );
836 } else {
837 wfDebugLog( $this->log, "$class::$fname: $action (type: $type; content: '$in')" );
838 }
839 }
840
847 private function debugFile( $fname, $io ) {
848 if ( !$this->log ) {
849 return;
850 }
851 $class = ucfirst( __CLASS__ );
852 if ( $io ) {
853 wfDebugLog( $this->log, "$class::$fname: begin processing: '{$this->basename}'" );
854 } else {
855 wfDebugLog( $this->log, "$class::$fname: end processing: '{$this->basename}'" );
856 }
857 }
858}
wfWarn( $msg, $callerOffset=1, $level=E_USER_NOTICE)
Send a warning either to the debug log or in a PHP error depending on $wgDevelopmentWarnings.
wfBaseName( $path, $suffix='')
Return the final portion of a pathname.
wfDebugLog( $logGroup, $text, $dest='all', array $context=[])
Send a line to a supplementary debug log file, if configured, or main debug log if not.
$debug
Definition Setup.php:783
Class to extract and validate Exif data from jpeg (and possibly tiff) files.
Definition Exif.php:32
const SRATIONAL
Two SLONGs.
Definition Exif.php:64
validate( $section, $tag, $val, $recursive=false)
#-
Definition Exif.php:735
isRational( $in)
Definition Exif.php:664
const BYTE
An 8-bit (1-byte) unsigned integer.
Definition Exif.php:34
exifPropToOrd( $prop)
Convert an Exif::UNDEFINED from a raw binary string to its value.
Definition Exif.php:504
getData()
#-
Definition Exif.php:556
const SHORT_OR_LONG
A 16-bit (2-byte) or 32-bit (4-byte) unsigned integer.
Definition Exif.php:53
string $file
The file being processed.
Definition Exif.php:85
const RATIONAL
Two LONGs.
Definition Exif.php:50
array $mFilteredExifData
A Filtered version of $mRawExifData that has been pruned of invalid tags and tags that contain conten...
Definition Exif.php:82
const UNDEFINED
An 8-bit byte that can take any value depending on the field definition.
Definition Exif.php:56
isUndefined( $in)
Definition Exif.php:683
string $byteOrder
The byte order of the file.
Definition Exif.php:96
static version()
#-
Definition Exif.php:582
const ASCII
An 8-bit byte containing one 7-bit ASCII code.
Definition Exif.php:39
isSrational( $in)
Definition Exif.php:709
getFilteredData()
Get $this->mFilteredExifData.
Definition Exif.php:564
debug( $in, $fname, $action=null)
Convenience function for debugging output.
Definition Exif.php:820
const SHORT
A 16-bit (2-byte) unsigned integer.
Definition Exif.php:42
charCodeString( $prop)
Do userComment tags and similar.
Definition Exif.php:444
const LONG
A 32-bit (4-byte) unsigned integer.
Definition Exif.php:45
array $mExifTags
Exif tags grouped by category, the tagname itself is the key and the type is the value,...
Definition Exif.php:73
array $mRawExifData
The raw Exif data returned by exif_read_data()
Definition Exif.php:76
__construct( $file, $byteOrder='')
Definition Exif.php:108
makeFilteredData()
Make $this->mFilteredExifData.
Definition Exif.php:316
isLong( $in)
Definition Exif.php:648
string $log
The private log to log to, e.g.
Definition Exif.php:91
string $basename
The basename of the file being processed.
Definition Exif.php:88
isSlong( $in)
Definition Exif.php:693
isASCII( $in)
Definition Exif.php:608
collapseData()
Collapse some fields together.
Definition Exif.php:362
isShort( $in)
Definition Exif.php:632
const IGNORE
A fake value for things we don't want or don't support.
Definition Exif.php:67
debugFile( $fname, $io)
Convenience function for debugging output.
Definition Exif.php:847
exifGPStoNumber( $prop)
Convert gps in exif form to a single floating point number for example 10 degress 2040` S -> -10....
Definition Exif.php:515
isByte( $in)
Validates if a tag value is of the type it should be according to the Exif spec.
Definition Exif.php:592
const SLONG
A 32-bit (4-byte) signed integer (2's complement notation),.
Definition Exif.php:59
Implements some public methods and some protected utility functions which are required by multiple ch...
Definition File.php:61
MediaWiki exception.
The User object encapsulates all of the user-specific settings (user_id, name, rights,...
Definition User.php:51