<?php
-if (defined('MEDIAWIKI')) {
+if ( !defined( 'MEDIAWIKI' ) ) die();
/**
* @package MediaWiki
* @subpackage Metadata
class Exif {
/**#@+
* @var array
+ * @access private
*/
-
+
/**
* Exif tags grouped by category, the tagname itself is the key and the type
* is the value, in the case of more than one possible value type they are
* seperated by commas.
- *
- * @access private
*/
- var $mExif;
-
+ var $mExifTags;
+
/**
* A one dimentional array of all Exif tags
*/
- var $mFlatExif;
+ var $mFlatExifTags;
+
+ /**
+ * The raw Exif data returned by exif_read_data()
+ */
+ var $mRawExifData;
+
+ /**
+ * A Filtered version of $mRawExifData that has been pruned of invalid
+ * tags and tags that contain content they shouldn't contain according
+ * to the Exif specification
+ */
+ var $mFilteredExifData;
+
+ /**
+ * Filtered and formatted Exif data, see FormatExif::getFormattedData()
+ */
+ var $mFormattedExifData;
/**#@-*/
/**
* Constructor
*/
- function Exif() {
+ function Exif( $file ) {
/**
* Page numbers here refer to pages in the EXIF 2.2 standard
*
* @link http://exif.org/Exif2-2.PDF The Exif 2.2 specification
*/
- $this->mExif = array(
+ $this->mExifTags = array(
# TIFF Rev. 6.0 Attribute Information (p22)
'tiff' => array(
# Tags relating to image structure
);
$this->makeFlatExifTags();
+ wfSuppressWarnings();
+ $this->mRawExifData = exif_read_data( $file );
+ wfRestoreWarnings();
+ $this->makeFilteredData();
+ $this->makeFormattedData();
}
-
+
+ /**#@+
+ * @access private
+ */
/**
* Generate a flat list of the exif tags
*/
function makeFlatExifTags() {
- $this->extractTags( $this->mExif );
+ $this->extractTags( $this->mExifTags );
}
/**
* Note: This used to use an array_walk function, but it made PHP5
* segfault, see `cvs diff -u -r 1.4 -r 1.5 Exif.php`
*/
- function extractTags( $tagset ) {
+ function extractTags( &$tagset ) {
foreach( $tagset as $key => $val ) {
if( is_array( $val ) ) {
$this->extractTags( $val );
} else {
- $this->mFlatExif[$key] = $val;
+ $this->mFlatExifTags[$key] = $val;
+ }
+ }
+ }
+
+ /**#@-*/
+
+ /**
+ * Make $this->mFilteredExifData
+ */
+ function makeFilteredData() {
+ $this->mFilteredExifData = $this->mRawExifData;
+
+ foreach( $this->mFilteredExifData as $k => $v ) {
+ if ( !in_array( $k, array_keys( $this->mFlatExifTags ) ) ) {
+ $this->debug( $v, __FUNCTION__, "'$k' is not a valid Exif tag" );
+ unset( $this->mFilteredExifData[$k] );
+ }
+ }
+
+ foreach( $this->mFilteredExifData as $k => $v ) {
+ if ( !$this->validate($k, $v) ) {
+ $this->debug( $v, __FUNCTION__, "'$k' contained invalid data" );
+ unset( $this->mFilteredExifData[$k] );
}
}
}
+
+ function makeFormattedData( $data = null ) {
+ $format = new FormatExif( $this->getFilteredData() );
+ $this->mFormattedExifData = $format->getFormattedData();
+ }
+ /**#@-*/
+
+ /**#@+
+ * @return array
+ */
+ /**
+ * Get $this->mRawExifData
+ */
+ function getData() {
+ return $this->mRawExifData;
+ }
+
+ /**
+ * Get $this->mFilteredExifData
+ */
+ function getFilteredData() {
+ return $this->mFilteredExifData;
+ }
+
+ /**
+ * Get $this->mFormattedExifData
+ */
+ function getFormattedData() {
+ return $this->mFormattedExifData;
+ }
+ /**#@-*/
- /**
- * The version of the output format
- *
- * Before the actual metadata information is saved in the database we
- * strip some of it since we don't want to save things like thumbnails
- * which usually accompany Exif data. This value gets saved in the
- * database along with the actual Exif data, and if the version in the
- * database doesn't equal the value returned by this function the Exif
- * data is regenerated.
- *
- * @return int
- */
+ /**
+ * The version of the output format
+ *
+ * Before the actual metadata information is saved in the database we
+ * strip some of it since we don't want to save things like thumbnails
+ * which usually accompany Exif data. This value gets saved in the
+ * database along with the actual Exif data, and if the version in the
+ * database doesn't equal the value returned by this function the Exif
+ * data is regenerated.
+ *
+ * @return int
+ */
function version() {
return 1; // We don't need no bloddy constants!
}
*/
function validate( $tag, $val ) {
// Fucks up if not typecast
- switch( (string)$this->mFlatExif[$tag] ) {
+ switch( (string)$this->mFlatExifTags[$tag] ) {
case (string)MW_EXIF_BYTE:
return $this->isByte( $val );
case (string)MW_EXIF_ASCII:
}
}
+ /**
+ * Conviniance function for debugging output
+ *
+ * @param mixed $in
+ * @param string $fname
+ * @param mixed $action
+ */
+ function debug( $in, $fname, $action = null ) {
+ $type = gettype( $in );
+ $class = ucfirst( __CLASS__ );
+ if ( $type === 'array' )
+ $in = print_r( $in, true );
+
+ if ( $action === true )
+ wfDebug( "$class::$fname: accepted: '$in' (type: $type)\n");
+ elseif ( $action === false )
+ wfDebug( "$class::$fname: rejected: '$in' (type: $type)\n");
+ elseif ( $action === null )
+ wfDebug( "$class::$fname: input was: '$in' (type: $type)\n");
+ else
+ wfDebug( "$class::$fname: $action (type: $type; content: '$in')\n");
+ }
+
+}
+
+/**
+ * @package MediaWiki
+ * @subpackage Metadata
+ */
+class FormatExif {
+ /**
+ * The Exif data to format
+ *
+ * @var array
+ * @access private
+ */
+ var $mExif;
+
+ /**
+ * Constructor
+ *
+ * @param array $exif The Exif data to format ( as returned by
+ * Exif::getFilteredData() )
+ */
+ function FormatExif( $exif ) {
+ $this->mExif = $exif;
+ }
+
/**
* Numbers given by Exif user agents are often magical, that is they
* should be replaced by a detailed explanation depending on their
* value which most of the time are plain integers. This function
* formats Exif values into human readable form.
*
- * @param string $tag The tag to be formatted
- * @param mixed $val The value of the tag
- * @return string
+ * @return array
*/
- function format( $tag, $val ) {
+ function getFormattedData() {
global $wgLang;
- switch( $tag ) {
- case 'Compression':
- switch( $val ) {
- case 1: case 6:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'PhotometricInterpretation':
- switch( $val ) {
- case 2: case 6:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'Orientation':
- switch( $val ) {
- case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'PlanarConfiguration':
- switch( $val ) {
- case 1: case 2:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- // TODO: YCbCrSubSampling
- // TODO: YCbCrPositioning
- // TODO: If this field does not exists use 2
- case 'ResolutionUnit': #p26
- switch( $val ) {
- case 2: case 3:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- // TODO: YCbCrCoefficients #p27 (see annex E)
- case 'ExifVersion': case 'FlashpixVersion':
- return "$val"/100;
-
- case 'ColorSpace':
- switch( $val ) {
- case 1: case 'FFFF.H':
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'ComponentsConfiguration':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
+ $tags =& $this->mExif;
- case 'DateTime':
- case 'DateTimeOriginal':
- case 'DateTimeDigitized':
- return $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
-
- case 'ExposureProgram':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'MeteringMode':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 255:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'LightSource':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4: case 9: case 10: case 11:
- case 12: case 13: case 14: case 15: case 17: case 18: case 19: case 20:
- case 21: case 22: case 23: case 24: case 255:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- // TODO: Flash
- case 'SensingMethod':
- switch( $val ) {
- case 1: case 2: case 3: case 4: case 5: case 7: case 8:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'FileSource':
- switch( $val ) {
- case 3:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'SceneType':
- switch( $val ) {
- case 1:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'CustomRendered':
- switch( $val ) {
- case 0: case 1:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'ExposureMode':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'WhiteBalance':
- switch( $val ) {
- case 0: case 1:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'SceneCaptureType':
- switch( $val ) {
- case 0: case 1: case 2: case 3:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'GainControl':
- switch( $val ) {
- case 0: case 1: case 2: case 3: case 4:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'Contrast':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
-
- case 'Saturation':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
+ foreach( $tags as $tag => $val ) {
+ switch( $tag ) {
+ case 'Compression':
+ switch( $val ) {
+ case 1: case 6:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'PhotometricInterpretation':
+ switch( $val ) {
+ case 2: case 6:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
- case 'Sharpness':
- switch( $val ) {
- case 0: case 1: case 2:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
+ case 'Orientation':
+ switch( $val ) {
+ case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
- case 'SubjectDistanceRange':
- switch( $val ) {
- case 0: case 1: case 2: case 3:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
+ case 'PlanarConfiguration':
+ switch( $val ) {
+ case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
- case 'GPSLatitudeRef':
- case 'GPSDestLatitudeRef':
- switch( $val ) {
- case 'N': case 'S':
- return $this->msg( 'GPSLatitude', $val );
- default:
- return $val;
- }
+ // TODO: YCbCrSubSampling
+ // TODO: YCbCrPositioning
+ // TODO: If this field does not exists use 2
+ case 'ResolutionUnit': #p26
+ switch( $val ) {
+ case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
- case 'GPSLongitudeRef':
- case 'GPSDestLongitudeRef':
- switch( $val ) {
- case 'E': case 'W':
- return $this->msg( 'GPSLongitude', $val );
- default:
- return $val;
- }
+ // TODO: YCbCrCoefficients #p27 (see annex E)
+ case 'ExifVersion': case 'FlashpixVersion':
+ $tags[$tag] = "$val"/100;
+ break;
- case 'GPSStatus':
- switch( $val ) {
- case 'A': case 'V':
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
+ case 'ColorSpace':
+ switch( $val ) {
+ case 1: case 'FFFF.H':
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
- case 'GPSMeasureMode':
- switch( $val ) {
- case 2: case 3:
- return $this->msg( $tag, $val );
- default:
- return $val;
- }
+ case 'ComponentsConfiguration':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
- case 'GPSSpeedRef':
- case 'GPSDestDistanceRef':
- switch( $val ) {
- case 'K': case 'M': case 'N':
- return $this->msg( 'GPSSpeed', $val );
- default:
- return $val;
- }
+ case 'DateTime':
+ case 'DateTimeOriginal':
+ case 'DateTimeDigitized':
+ $tags[$tag] = $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
+ break;
- case 'GPSTrackRef':
- case 'GPSImgDirectionRef':
- case 'GPSDestBearingRef':
- switch( $val ) {
- case 'T': case 'M':
- return $this->msg( 'GPSDirection', $val );
+ case 'ExposureProgram':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'MeteringMode':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 255:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'LightSource':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4: case 9: case 10: case 11:
+ case 12: case 13: case 14: case 15: case 17: case 18: case 19: case 20:
+ case 21: case 22: case 23: case 24: case 255:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ // TODO: Flash
+ case 'SensingMethod':
+ switch( $val ) {
+ case 1: case 2: case 3: case 4: case 5: case 7: case 8:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'FileSource':
+ switch( $val ) {
+ case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'SceneType':
+ switch( $val ) {
+ case 1:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'CustomRendered':
+ switch( $val ) {
+ case 0: case 1:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'ExposureMode':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'WhiteBalance':
+ switch( $val ) {
+ case 0: case 1:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'SceneCaptureType':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GainControl':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3: case 4:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'Contrast':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'Saturation':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'Sharpness':
+ switch( $val ) {
+ case 0: case 1: case 2:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'SubjectDistanceRange':
+ switch( $val ) {
+ case 0: case 1: case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSLatitudeRef':
+ case 'GPSDestLatitudeRef':
+ switch( $val ) {
+ case 'N': case 'S':
+ $tags[$tag] = $this->msg( 'GPSLatitude', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSLongitudeRef':
+ case 'GPSDestLongitudeRef':
+ switch( $val ) {
+ case 'E': case 'W':
+ $tags[$tag] = $this->msg( 'GPSLongitude', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSStatus':
+ switch( $val ) {
+ case 'A': case 'V':
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSMeasureMode':
+ switch( $val ) {
+ case 2: case 3:
+ $tags[$tag] = $this->msg( $tag, $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSSpeedRef':
+ case 'GPSDestDistanceRef':
+ switch( $val ) {
+ case 'K': case 'M': case 'N':
+ $tags[$tag] = $this->msg( 'GPSSpeed', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSTrackRef':
+ case 'GPSImgDirectionRef':
+ case 'GPSDestBearingRef':
+ switch( $val ) {
+ case 'T': case 'M':
+ $tags[$tag] = $this->msg( 'GPSDirection', $val );
+ break;
+ default:
+ $tags[$tag] = $val;
+ break;
+ }
+
+ case 'GPSDateStamp':
+ $tags[$tag] = $wgLang->date( substr( $val, 0, 4 ) . substr( $val, 5, 2 ) . substr( $val, 8, 2 ) . '000000' );
+ break;
+
+ // This is not in the Exif standard, just a special
+ // case for our purposes which enables wikis to wikify
+ // the make, model and software name to link to their articles.
+ case 'Make':
+ case 'Model':
+ case 'Software':
+ $tags[$tag] = wfMsg( strtolower( "exif-$tag-value" ), $val );
+ break;
default:
- return $val;
- }
-
- case 'GPSDateStamp':
- return $wgLang->date( substr( $val, 0, 4 ) . substr( $val, 5, 2 ) . substr( $val, 8, 2 ) . '000000' );
-
- // This is not in the Exif standard, just a special
- // case for our purposes which enables wikis to wikify
- // the make, model and software name to link to their articles.
- case 'Make':
- case 'Model':
- case 'Software':
- return wfMsg( strtolower( "exif-$tag-value" ), $val );
- default:
- if ( preg_match( '/^(\d+)\/(\d+)$/', $val, $m ) ) {
- return $m[2] != 0 ? $m[1]/$m[2] : $val;
+ if ( preg_match( '/^(\d+)\/(\d+)$/', $val, $m ) ) {
+ $tags[$tag] = $m[2] != 0 ? $m[1]/$m[2] : $val;
+ break;
+ }
+ $tags[$tag] = $val;
+ break;
}
- return $val;
}
+
+ return $tags;
}
/**
function msg( $tag, $val ) {
return wfMsg( strtolower("exif-$tag-$val") );
}
-
- /**
- * Conviniance function for debugging output
- *
- * @param mixed $in
- * @param string $fname
- * @param mixed $action
- */
- function debug( $in, $fname, $action = null ) {
- $type = gettype( $in );
- $class = ucfirst( __CLASS__ );
- if ( $type === 'array' )
- $in = print_r( $in, true );
-
- if ( $action === true )
- wfDebug( "$class::$fname: accepted: '$in' (type: $type)\n");
- elseif ( $action === false )
- wfDebug( "$class::$fname: rejected: '$in' (type: $type)\n");
- elseif ( $action === null )
- wfDebug( "$class::$fname: input was: '$in' (type: $type)\n");
- else
- wfDebug( "$class::$fname: $action (type: $type; content: '$in')\n");
- }
}
-
-} // MEDIAWIKI
dépôts / lhc / web / wiklou.git / commitdiff