+++ /dev/null
-<?php
-/**
- * Exif metadata reader
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- * http://www.gnu.org/copyleft/gpl.html
- *
- * @ingroup Media
- * @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
- * @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
- * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License
- * @see http://exif.org/Exif2-2.PDF The Exif 2.2 specification
- * @file
- */
-
-/**
- * @todo document (e.g. one-sentence class-overview description)
- * @ingroup Media
- */
-class Exif {
-
- const BYTE = 1; //!< An 8-bit (1-byte) unsigned integer.
- const ASCII = 2; //!< An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL.
- const SHORT = 3; //!< A 16-bit (2-byte) unsigned integer.
- const LONG = 4; //!< A 32-bit (4-byte) unsigned integer.
- const RATIONAL = 5; //!< Two LONGs. The first LONG is the numerator and the second LONG expresses the denominator
- const UNDEFINED = 7; //!< An 8-bit byte that can take any value depending on the field definition
- const SLONG = 9; //!< A 32-bit (4-byte) signed integer (2's complement notation),
- const SRATIONAL = 10; //!< Two SLONGs. The first SLONG is the numerator and the second SLONG is the denominator.
-
- //@{
- /* @var array
- * @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
- * separated by commas.
- */
- var $mExifTags;
-
- /**
- * A one dimentional array of all Exif tags
- */
- 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;
-
- //@}
-
- //@{
- /* @var string
- * @private
- */
-
- /**
- * The file being processed
- */
- var $file;
-
- /**
- * The basename of the file being processed
- */
- var $basename;
-
- /**
- * The private log to log to, e.g. 'exif'
- */
- var $log = false;
-
- //@}
-
- /**
- * Constructor
- *
- * @param $file String: filename.
- */
- function __construct( $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->mExifTags = array(
- # TIFF Rev. 6.0 Attribute Information (p22)
- 'tiff' => array(
- # Tags relating to image structure
- 'structure' => array(
- 'ImageWidth' => Exif::SHORT.','.Exif::LONG, # Image width
- 'ImageLength' => Exif::SHORT.','.Exif::LONG, # Image height
- 'BitsPerSample' => Exif::SHORT, # Number of bits per component
- # "When a primary image is JPEG compressed, this designation is not"
- # "necessary and is omitted." (p23)
- 'Compression' => Exif::SHORT, # Compression scheme #p23
- 'PhotometricInterpretation' => Exif::SHORT, # Pixel composition #p23
- 'Orientation' => Exif::SHORT, # Orientation of image #p24
- 'SamplesPerPixel' => Exif::SHORT, # Number of components
- 'PlanarConfiguration' => Exif::SHORT, # Image data arrangement #p24
- 'YCbCrSubSampling' => Exif::SHORT, # Subsampling ratio of Y to C #p24
- 'YCbCrPositioning' => Exif::SHORT, # Y and C positioning #p24-25
- 'XResolution' => Exif::RATIONAL, # Image resolution in width direction
- 'YResolution' => Exif::RATIONAL, # Image resolution in height direction
- 'ResolutionUnit' => Exif::SHORT, # Unit of X and Y resolution #(p26)
- ),
-
- # Tags relating to recording offset
- 'offset' => array(
- 'StripOffsets' => Exif::SHORT.','.Exif::LONG, # Image data location
- 'RowsPerStrip' => Exif::SHORT.','.Exif::LONG, # Number of rows per strip
- 'StripByteCounts' => Exif::SHORT.','.Exif::LONG, # Bytes per compressed strip
- 'JPEGInterchangeFormat' => Exif::SHORT.','.Exif::LONG, # Offset to JPEG SOI
- 'JPEGInterchangeFormatLength' => Exif::SHORT.','.Exif::LONG, # Bytes of JPEG data
- ),
-
- # Tags relating to image data characteristics
- 'characteristics' => array(
- 'TransferFunction' => Exif::SHORT, # Transfer function
- 'WhitePoint' => Exif::RATIONAL, # White point chromaticity
- 'PrimaryChromaticities' => Exif::RATIONAL, # Chromaticities of primarities
- 'YCbCrCoefficients' => Exif::RATIONAL, # Color space transformation matrix coefficients #p27
- 'ReferenceBlackWhite' => Exif::RATIONAL # Pair of black and white reference values
- ),
-
- # Other tags
- 'other' => array(
- 'DateTime' => Exif::ASCII, # File change date and time
- 'ImageDescription' => Exif::ASCII, # Image title
- 'Make' => Exif::ASCII, # Image input equipment manufacturer
- 'Model' => Exif::ASCII, # Image input equipment model
- 'Software' => Exif::ASCII, # Software used
- 'Artist' => Exif::ASCII, # Person who created the image
- 'Copyright' => Exif::ASCII, # Copyright holder
- ),
- ),
-
- # Exif IFD Attribute Information (p30-31)
- 'exif' => array(
- # Tags relating to version
- 'version' => array(
- # TODO: NOTE: Nonexistence of this field is taken to mean nonconformance
- # to the EXIF 2.1 AND 2.2 standards
- 'ExifVersion' => Exif::UNDEFINED, # Exif version
- 'FlashpixVersion' => Exif::UNDEFINED, # Supported Flashpix version #p32
- ),
-
- # Tags relating to Image Data Characteristics
- 'characteristics' => array(
- 'ColorSpace' => Exif::SHORT, # Color space information #p32
- ),
-
- # Tags relating to image configuration
- 'configuration' => array(
- 'ComponentsConfiguration' => Exif::UNDEFINED, # Meaning of each component #p33
- 'CompressedBitsPerPixel' => Exif::RATIONAL, # Image compression mode
- 'PixelYDimension' => Exif::SHORT.','.Exif::LONG, # Valid image width
- 'PixelXDimension' => Exif::SHORT.','.Exif::LONG, # Valind image height
- ),
-
- # Tags relating to related user information
- 'user' => array(
- 'MakerNote' => Exif::UNDEFINED, # Manufacturer notes
- 'UserComment' => Exif::UNDEFINED, # User comments #p34
- ),
-
- # Tags relating to related file information
- 'related' => array(
- 'RelatedSoundFile' => Exif::ASCII, # Related audio file
- ),
-
- # Tags relating to date and time
- 'dateandtime' => array(
- 'DateTimeOriginal' => Exif::ASCII, # Date and time of original data generation #p36
- 'DateTimeDigitized' => Exif::ASCII, # Date and time of original data generation
- 'SubSecTime' => Exif::ASCII, # DateTime subseconds
- 'SubSecTimeOriginal' => Exif::ASCII, # DateTimeOriginal subseconds
- 'SubSecTimeDigitized' => Exif::ASCII, # DateTimeDigitized subseconds
- ),
-
- # Tags relating to picture-taking conditions (p31)
- 'conditions' => array(
- 'ExposureTime' => Exif::RATIONAL, # Exposure time
- 'FNumber' => Exif::RATIONAL, # F Number
- 'ExposureProgram' => Exif::SHORT, # Exposure Program #p38
- 'SpectralSensitivity' => Exif::ASCII, # Spectral sensitivity
- 'ISOSpeedRatings' => Exif::SHORT, # ISO speed rating
- 'OECF' => Exif::UNDEFINED, # Optoelectronic conversion factor
- 'ShutterSpeedValue' => Exif::SRATIONAL, # Shutter speed
- 'ApertureValue' => Exif::RATIONAL, # Aperture
- 'BrightnessValue' => Exif::SRATIONAL, # Brightness
- 'ExposureBiasValue' => Exif::SRATIONAL, # Exposure bias
- 'MaxApertureValue' => Exif::RATIONAL, # Maximum land aperture
- 'SubjectDistance' => Exif::RATIONAL, # Subject distance
- 'MeteringMode' => Exif::SHORT, # Metering mode #p40
- 'LightSource' => Exif::SHORT, # Light source #p40-41
- 'Flash' => Exif::SHORT, # Flash #p41-42
- 'FocalLength' => Exif::RATIONAL, # Lens focal length
- 'SubjectArea' => Exif::SHORT, # Subject area
- 'FlashEnergy' => Exif::RATIONAL, # Flash energy
- 'SpatialFrequencyResponse' => Exif::UNDEFINED, # Spatial frequency response
- 'FocalPlaneXResolution' => Exif::RATIONAL, # Focal plane X resolution
- 'FocalPlaneYResolution' => Exif::RATIONAL, # Focal plane Y resolution
- 'FocalPlaneResolutionUnit' => Exif::SHORT, # Focal plane resolution unit #p46
- 'SubjectLocation' => Exif::SHORT, # Subject location
- 'ExposureIndex' => Exif::RATIONAL, # Exposure index
- 'SensingMethod' => Exif::SHORT, # Sensing method #p46
- 'FileSource' => Exif::UNDEFINED, # File source #p47
- 'SceneType' => Exif::UNDEFINED, # Scene type #p47
- 'CFAPattern' => Exif::UNDEFINED, # CFA pattern
- 'CustomRendered' => Exif::SHORT, # Custom image processing #p48
- 'ExposureMode' => Exif::SHORT, # Exposure mode #p48
- 'WhiteBalance' => Exif::SHORT, # White Balance #p49
- 'DigitalZoomRatio' => Exif::RATIONAL, # Digital zoom ration
- 'FocalLengthIn35mmFilm' => Exif::SHORT, # Focal length in 35 mm film
- 'SceneCaptureType' => Exif::SHORT, # Scene capture type #p49
- 'GainControl' => Exif::RATIONAL, # Scene control #p49-50
- 'Contrast' => Exif::SHORT, # Contrast #p50
- 'Saturation' => Exif::SHORT, # Saturation #p50
- 'Sharpness' => Exif::SHORT, # Sharpness #p50
- 'DeviceSettingDescription' => Exif::UNDEFINED, # Desice settings description
- 'SubjectDistanceRange' => Exif::SHORT, # Subject distance range #p51
- ),
-
- 'other' => array(
- 'ImageUniqueID' => Exif::ASCII, # Unique image ID
- ),
- ),
-
- # GPS Attribute Information (p52)
- 'gps' => array(
- 'GPSVersionID' => Exif::BYTE, # GPS tag version
- 'GPSLatitudeRef' => Exif::ASCII, # North or South Latitude #p52-53
- 'GPSLatitude' => Exif::RATIONAL, # Latitude
- 'GPSLongitudeRef' => Exif::ASCII, # East or West Longitude #p53
- 'GPSLongitude' => Exif::RATIONAL, # Longitude
- 'GPSAltitudeRef' => Exif::BYTE, # Altitude reference
- 'GPSAltitude' => Exif::RATIONAL, # Altitude
- 'GPSTimeStamp' => Exif::RATIONAL, # GPS time (atomic clock)
- 'GPSSatellites' => Exif::ASCII, # Satellites used for measurement
- 'GPSStatus' => Exif::ASCII, # Receiver status #p54
- 'GPSMeasureMode' => Exif::ASCII, # Measurement mode #p54-55
- 'GPSDOP' => Exif::RATIONAL, # Measurement precision
- 'GPSSpeedRef' => Exif::ASCII, # Speed unit #p55
- 'GPSSpeed' => Exif::RATIONAL, # Speed of GPS receiver
- 'GPSTrackRef' => Exif::ASCII, # Reference for direction of movement #p55
- 'GPSTrack' => Exif::RATIONAL, # Direction of movement
- 'GPSImgDirectionRef' => Exif::ASCII, # Reference for direction of image #p56
- 'GPSImgDirection' => Exif::RATIONAL, # Direction of image
- 'GPSMapDatum' => Exif::ASCII, # Geodetic survey data used
- 'GPSDestLatitudeRef' => Exif::ASCII, # Reference for latitude of destination #p56
- 'GPSDestLatitude' => Exif::RATIONAL, # Latitude destination
- 'GPSDestLongitudeRef' => Exif::ASCII, # Reference for longitude of destination #p57
- 'GPSDestLongitude' => Exif::RATIONAL, # Longitude of destination
- 'GPSDestBearingRef' => Exif::ASCII, # Reference for bearing of destination #p57
- 'GPSDestBearing' => Exif::RATIONAL, # Bearing of destination
- 'GPSDestDistanceRef' => Exif::ASCII, # Reference for distance to destination #p57-58
- 'GPSDestDistance' => Exif::RATIONAL, # Distance to destination
- 'GPSProcessingMethod' => Exif::UNDEFINED, # Name of GPS processing method
- 'GPSAreaInformation' => Exif::UNDEFINED, # Name of GPS area
- 'GPSDateStamp' => Exif::ASCII, # GPS date
- 'GPSDifferential' => Exif::SHORT, # GPS differential correction
- ),
- );
-
- $this->file = $file;
- $this->basename = wfBaseName( $this->file );
-
- $this->makeFlatExifTags();
-
- $this->debugFile( $this->basename, __FUNCTION__, true );
- wfSuppressWarnings();
- $data = exif_read_data( $this->file );
- wfRestoreWarnings();
- /**
- * exif_read_data() will return false on invalid input, such as
- * when somebody uploads a file called something.jpeg
- * containing random gibberish.
- */
- $this->mRawExifData = $data ? $data : array();
-
- $this->makeFilteredData();
- $this->makeFormattedData();
-
- $this->debugFile( __FUNCTION__, false );
- }
-
- /**#@+
- * @private
- */
- /**
- * Generate a flat list of the exif tags
- */
- function makeFlatExifTags() {
- $this->extractTags( $this->mExifTags );
- }
-
- /**
- * A recursing extractor function used by makeFlatExifTags()
- *
- * Note: This used to use an array_walk function, but it made PHP5
- * segfault, see `cvs diff -u -r 1.4 -r 1.5 Exif.php`
- */
- function extractTags( &$tagset ) {
- foreach( $tagset as $key => $val ) {
- if( is_array( $val ) ) {
- $this->extractTags( $val );
- } else {
- $this->mFlatExifTags[$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] );
- }
- }
- }
-
- /**
- * @todo document
- */
- function makeFormattedData( ) {
- $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
- */
- public static function version() {
- return 1; // We don't need no bloddy constants!
- }
-
- /**#@+
- * Validates if a tag value is of the type it should be according to the Exif spec
- *
- * @private
- *
- * @param $in Mixed: the input value to check
- * @return bool
- */
- function isByte( $in ) {
- if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) {
- $this->debug( $in, __FUNCTION__, true );
- return true;
- } else {
- $this->debug( $in, __FUNCTION__, false );
- return false;
- }
- }
-
- function isASCII( $in ) {
- if ( is_array( $in ) ) {
- return false;
- }
-
- if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) {
- $this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' );
- return false;
- }
-
- if ( preg_match( '/^\s*$/', $in ) ) {
- $this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' );
- return false;
- }
-
- return true;
- }
-
- function isShort( $in ) {
- if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) {
- $this->debug( $in, __FUNCTION__, true );
- return true;
- } else {
- $this->debug( $in, __FUNCTION__, false );
- return false;
- }
- }
-
- function isLong( $in ) {
- if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) {
- $this->debug( $in, __FUNCTION__, true );
- return true;
- } else {
- $this->debug( $in, __FUNCTION__, false );
- return false;
- }
- }
-
- function isRational( $in ) {
- $m = array();
- if ( !is_array( $in ) && @preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero
- return $this->isLong( $m[1] ) && $this->isLong( $m[2] );
- } else {
- $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
- return false;
- }
- }
-
- function isUndefined( $in ) {
- if ( !is_array( $in ) && preg_match( '/^\d{4}$/', $in ) ) { // Allow ExifVersion and FlashpixVersion
- $this->debug( $in, __FUNCTION__, true );
- return true;
- } else {
- $this->debug( $in, __FUNCTION__, false );
- return false;
- }
- }
-
- function isSlong( $in ) {
- if ( $this->isLong( abs( $in ) ) ) {
- $this->debug( $in, __FUNCTION__, true );
- return true;
- } else {
- $this->debug( $in, __FUNCTION__, false );
- return false;
- }
- }
-
- function isSrational( $in ) {
- $m = array();
- if ( !is_array( $in ) && preg_match( '/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/', $in, $m ) ) { # Avoid division by zero
- return $this->isSlong( $m[0] ) && $this->isSlong( $m[1] );
- } else {
- $this->debug( $in, __FUNCTION__, 'fed a non-fraction value' );
- return false;
- }
- }
- /**#@-*/
-
- /**
- * Validates if a tag has a legal value according to the Exif spec
- *
- * @private
- *
- * @param $tag String: the tag to check.
- * @param $val Mixed: the value of the tag.
- * @return bool
- */
- function validate( $tag, $val ) {
- $debug = "tag is '$tag'";
- // Does not work if not typecast
- switch( (string)$this->mFlatExifTags[$tag] ) {
- case (string)Exif::BYTE:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isByte( $val );
- case (string)Exif::ASCII:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isASCII( $val );
- case (string)Exif::SHORT:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isShort( $val );
- case (string)Exif::LONG:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isLong( $val );
- case (string)Exif::RATIONAL:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isRational( $val );
- case (string)Exif::UNDEFINED:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isUndefined( $val );
- case (string)Exif::SLONG:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isSlong( $val );
- case (string)Exif::SRATIONAL:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isSrational( $val );
- case (string)Exif::SHORT.','.Exif::LONG:
- $this->debug( $val, __FUNCTION__, $debug );
- return $this->isShort( $val ) || $this->isLong( $val );
- default:
- $this->debug( $val, __FUNCTION__, "The tag '$tag' is unknown" );
- return false;
- }
- }
-
- /**
- * Convenience function for debugging output
- *
- * @private
- *
- * @param $in Mixed:
- * @param $fname String:
- * @param $action Mixed: , default NULL.
- */
- function debug( $in, $fname, $action = null ) {
- if ( !$this->log ) {
- return;
- }
- $type = gettype( $in );
- $class = ucfirst( __CLASS__ );
- if ( $type === 'array' )
- $in = print_r( $in, true );
-
- if ( $action === true )
- wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)\n");
- elseif ( $action === false )
- wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)\n");
- elseif ( $action === null )
- wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)\n");
- else
- wfDebugLog( $this->log, "$class::$fname: $action (type: $type; content: '$in')\n");
- }
-
- /**
- * Convenience function for debugging output
- *
- * @private
- *
- * @param $fname String: the name of the function calling this function
- * @param $io Boolean: Specify whether we're beginning or ending
- */
- function debugFile( $fname, $io ) {
- if ( !$this->log ) {
- return;
- }
- $class = ucfirst( __CLASS__ );
- if ( $io ) {
- wfDebugLog( $this->log, "$class::$fname: begin processing: '{$this->basename}'\n" );
- } else {
- wfDebugLog( $this->log, "$class::$fname: end processing: '{$this->basename}'\n" );
- }
- }
-
-}
-
-/**
- * @todo document (e.g. one-sentence class-overview description)
- * @ingroup Media
- */
-class FormatExif {
- /**
- * The Exif data to format
- *
- * @var array
- * @private
- */
- var $mExif;
-
- /**
- * Constructor
- *
- * @param $exif Array: the Exif data to format ( as returned by
- * Exif::getFilteredData() )
- */
- function __construct( $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.
- *
- * @return array
- */
- function getFormattedData() {
- global $wgLang;
-
- $tags =& $this->mExif;
-
- $resolutionunit = !isset( $tags['ResolutionUnit'] ) || $tags['ResolutionUnit'] == 2 ? 2 : 3;
- unset( $tags['ResolutionUnit'] );
-
- 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;
- }
- break;
-
- case 'PhotometricInterpretation':
- switch( $val ) {
- case 2: case 6:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- 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;
- }
- break;
-
- case 'PlanarConfiguration':
- switch( $val ) {
- case 1: case 2:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- // TODO: YCbCrSubSampling
- // TODO: YCbCrPositioning
-
- case 'XResolution':
- case 'YResolution':
- switch( $resolutionunit ) {
- case 2:
- $tags[$tag] = $this->msg( 'XYResolution', 'i', $this->formatNum( $val ) );
- break;
- case 3:
- $this->msg( 'XYResolution', 'c', $this->formatNum( $val ) );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- // TODO: YCbCrCoefficients #p27 (see annex E)
- case 'ExifVersion': case 'FlashpixVersion':
- $tags[$tag] = "$val"/100;
- break;
-
- case 'ColorSpace':
- switch( $val ) {
- case 1: case 'FFFF.H':
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- 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;
- }
- break;
-
- case 'DateTime':
- case 'DateTimeOriginal':
- case 'DateTimeDigitized':
- if( $val == '0000:00:00 00:00:00' ) {
- $tags[$tag] = wfMsg('exif-unknowndate');
- } elseif( preg_match( '/^(?:\d{4}):(?:\d\d):(?:\d\d) (?:\d\d):(?:\d\d):(?:\d\d)$/', $val ) ) {
- $tags[$tag] = $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
- }
- break;
-
- 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;
- }
- break;
-
- case 'SubjectDistance':
- $tags[$tag] = $this->msg( $tag, '', $this->formatNum( $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;
- }
- 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;
- }
- break;
-
- case 'Flash':
- $flashDecode = array(
- 'fired' => $val & bindec( '00000001' ),
- 'return' => ($val & bindec( '00000110' )) >> 1,
- 'mode' => ($val & bindec( '00011000' )) >> 3,
- 'function' => ($val & bindec( '00100000' )) >> 5,
- 'redeye' => ($val & bindec( '01000000' )) >> 6,
-// 'reserved' => ($val & bindec( '10000000' )) >> 7,
- );
-
- # We do not need to handle unknown values since all are used.
- foreach( $flashDecode as $subTag => $subValue ) {
- # We do not need any message for zeroed values.
- if( $subTag != 'fired' && $subValue == 0) {
- continue;
- }
- $fullTag = $tag . '-' . $subTag ;
- $flashMsgs[] = $this->msg( $fullTag, $subValue );
- }
- $tags[$tag] = $wgLang->commaList( $flashMsgs );
- break;
-
- case 'FocalPlaneResolutionUnit':
- switch( $val ) {
- case 2:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- 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;
- }
- break;
-
- case 'FileSource':
- switch( $val ) {
- case 3:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'SceneType':
- switch( $val ) {
- case 1:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'CustomRendered':
- switch( $val ) {
- case 0: case 1:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'ExposureMode':
- switch( $val ) {
- case 0: case 1: case 2:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'WhiteBalance':
- switch( $val ) {
- case 0: case 1:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- 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;
- }
- 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;
- }
- break;
-
- case 'Contrast':
- switch( $val ) {
- case 0: case 1: case 2:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'Saturation':
- switch( $val ) {
- case 0: case 1: case 2:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'Sharpness':
- switch( $val ) {
- case 0: case 1: case 2:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- 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;
- }
- break;
-
- case 'GPSLatitudeRef':
- case 'GPSDestLatitudeRef':
- switch( $val ) {
- case 'N': case 'S':
- $tags[$tag] = $this->msg( 'GPSLatitude', $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'GPSLongitudeRef':
- case 'GPSDestLongitudeRef':
- switch( $val ) {
- case 'E': case 'W':
- $tags[$tag] = $this->msg( 'GPSLongitude', $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'GPSStatus':
- switch( $val ) {
- case 'A': case 'V':
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- break;
-
- case 'GPSMeasureMode':
- switch( $val ) {
- case 2: case 3:
- $tags[$tag] = $this->msg( $tag, $val );
- break;
- default:
- $tags[$tag] = $val;
- break;
- }
- 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;
- }
- 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;
- }
- 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] = $this->msg( $tag, '', $val );
- break;
-
- case 'ExposureTime':
- // Show the pretty fraction as well as decimal version
- $tags[$tag] = wfMsg( 'exif-exposuretime-format',
- $this->formatFraction( $val ), $this->formatNum( $val ) );
- break;
-
- case 'FNumber':
- $tags[$tag] = wfMsg( 'exif-fnumber-format',
- $this->formatNum( $val ) );
- break;
-
- case 'FocalLength':
- $tags[$tag] = wfMsg( 'exif-focallength-format',
- $this->formatNum( $val ) );
- break;
-
- // Do not transform fields with pure text.
- // For some languages the formatNum() conversion results to wrong output like
- // foo,bar@example,com or foo٫bar@example٫com
- case 'ImageDescription':
- case 'Artist':
- case 'Copyright':
- $tags[$tag] = htmlspecialchars( $val );
- break;
- default:
- $tags[$tag] = $this->formatNum( $val );
- break;
- }
- }
-
- return $tags;
- }
-
- /**
- * Convenience function for getFormattedData()
- *
- * @private
- *
- * @param $tag String: the tag name to pass on
- * @param $val String: the value of the tag
- * @param $arg String: an argument to pass ($1)
- * @return string A wfMsg of "exif-$tag-$val" in lower case
- */
- function msg( $tag, $val, $arg = null ) {
- global $wgContLang;
-
- if ($val === '')
- $val = 'value';
- return wfMsg( $wgContLang->lc( "exif-$tag-$val" ), $arg );
- }
-
- /**
- * Format a number, convert numbers from fractions into floating point
- * numbers
- *
- * @private
- *
- * @param $num Mixed: the value to format
- * @return mixed A floating point number or whatever we were fed
- */
- function formatNum( $num ) {
- global $wgLang;
-
- $m = array();
- if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) )
- return $wgLang->formatNum( $m[2] != 0 ? $m[1] / $m[2] : $num );
- else
- return $wgLang->formatNum( $num );
- }
-
- /**
- * Format a rational number, reducing fractions
- *
- * @private
- *
- * @param $num Mixed: the value to format
- * @return mixed A floating point number or whatever we were fed
- */
- function formatFraction( $num ) {
- $m = array();
- if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) ) {
- $numerator = intval( $m[1] );
- $denominator = intval( $m[2] );
- $gcd = $this->gcd( $numerator, $denominator );
- if( $gcd != 0 ) {
- // 0 shouldn't happen! ;)
- return $this->formatNum( $numerator / $gcd ) . '/' . $this->formatNum( $denominator / $gcd );
- }
- }
- return $this->formatNum( $num );
- }
-
- /**
- * Calculate the greatest common divisor of two integers.
- *
- * @param $a Integer: FIXME
- * @param $b Integer: FIXME
- * @return int
- * @private
- */
- function gcd( $a, $b ) {
- /*
- // http://en.wikipedia.org/wiki/Euclidean_algorithm
- // Recursive form would be:
- if( $b == 0 )
- return $a;
- else
- return gcd( $b, $a % $b );
- */
- while( $b != 0 ) {
- $remainder = $a % $b;
-
- // tail recursion...
- $a = $b;
- $b = $remainder;
- }
- return $a;
- }
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff