<?php
-if ( !defined( 'MEDIAWIKI' ) ) die();
/**
- * @package MediaWiki
- * @subpackage Metadata
+ * @addtogroup Media
*
* @author Ævar Arnfjörð Bjarmason <avarab@gmail.com>
* @copyright Copyright © 2005, Ævar Arnfjörð Bjarmason
*
* 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
+ * 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.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
- * @link http://exif.org/Exif2-2.PDF The Exif 2.2 specification
- * @bug 1555, 1947
+ * @see http://exif.org/Exif2-2.PDF The Exif 2.2 specification
*/
-/**#@+
- * Exif tag type definition
- */
-define('MW_EXIF_BYTE', 1); # An 8-bit unsigned integer.
-define('MW_EXIF_ASCII', 2); # An 8-bit byte containing one 7-bit ASCII code. The final byte is terminated with NULL.
-define('MW_EXIF_SHORT', 3); # A 16-bit (2-byte) unsigned integer.
-define('MW_EXIF_LONG', 4); # A 32-bit (4-byte) unsigned integer.
-define('MW_EXIF_RATIONAL', 5); # Two LONGs. The first LONG is the numerator and the second LONG expresses the denominator
-define('MW_EXIF_UNDEFINED', 7); # An 8-bit byte that can take any value depending on the field definition
-define('MW_EXIF_SLONG', 9); # A 32-bit (4-byte) signed integer (2's complement notation),
-define('MW_EXIF_SRATIONAL', 10); # Two SLONGs. The first SLONG is the numerator and the second SLONG is the denominator.
-/**#@-*/
-
-
/**
- * @package MediaWiki
- * @subpackage Metadata
+ * @todo document (e.g. one-sentence class-overview description)
+ * @addtogroup Media
*/
class Exif {
+ //@{
+ /* @var array
+ * @private
+ */
+
/**#@+
- * @var array
- * @access private
+ * Exif tag type definition
*/
-
+ 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.
+
/**
* 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
+ * is the value, in the case of more than one possible value type they are
* seperated by commas.
*/
var $mExifTags;
* 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 string $file
+ * @param $file String: filename.
*/
- function Exif( $file ) {
+ function __construct( $file ) {
/**
* Page numbers here refer to pages in the EXIF 2.2 standard
*
'tiff' => array(
# Tags relating to image structure
'structure' => array(
- 'ImageWidth' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Image width
- 'ImageLength' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Image height
- 'BitsPerSample' => MW_EXIF_SHORT, # Number of bits per component
+ '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' => MW_EXIF_SHORT, # Compression scheme #p23
- 'PhotometricInterpretation' => MW_EXIF_SHORT, # Pixel composition #p23
- 'Orientation' => MW_EXIF_SHORT, # Orientation of image #p24
- 'SamplesPerPixel' => MW_EXIF_SHORT, # Number of components
- 'PlanarConfiguration' => MW_EXIF_SHORT, # Image data arrangement #p24
- 'YCbCrSubSampling' => MW_EXIF_SHORT, # Subsampling ratio of Y to C #p24
- 'YCbCrPositioning' => MW_EXIF_SHORT, # Y and C positioning #p24-25
- 'XResolution' => MW_EXIF_RATIONAL, # Image resolution in width direction
- 'YResolution' => MW_EXIF_RATIONAL, # Image resolution in height direction
- 'ResolutionUnit' => MW_EXIF_SHORT, # Unit of X and Y resolution #(p26)
+ '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' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Image data location
- 'RowsPerStrip' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Number of rows per strip
- 'StripByteCounts' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Bytes per compressed strip
- 'JPEGInterchangeFormat' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Offset to JPEG SOI
- 'JPEGInterchangeFormatLength' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Bytes of JPEG data
+ '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' => MW_EXIF_SHORT, # Transfer function
- 'WhitePoint' => MW_EXIF_RATIONAL, # White point chromaticity
- 'PrimaryChromaticities' => MW_EXIF_RATIONAL, # Chromaticities of primarities
- 'YCbCrCoefficients' => MW_EXIF_RATIONAL, # Color space transformation matrix coefficients #p27
- 'ReferenceBlackWhite' => MW_EXIF_RATIONAL # Pair of black and white reference values
+ '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' => MW_EXIF_ASCII, # File change date and time
- 'ImageDescription' => MW_EXIF_ASCII, # Image title
- 'Make' => MW_EXIF_ASCII, # Image input equipment manufacturer
- 'Model' => MW_EXIF_ASCII, # Image input equipment model
- 'Software' => MW_EXIF_ASCII, # Software used
- 'Artist' => MW_EXIF_ASCII, # Person who created the image
- 'Copyright' => MW_EXIF_ASCII, # Copyright holder
+ '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' => MW_EXIF_UNDEFINED, # Exif version
- 'FlashpixVersion' => MW_EXIF_UNDEFINED, # Supported Flashpix version #p32
+ 'ExifVersion' => Exif::UNDEFINED, # Exif version
+ 'FlashpixVersion' => Exif::UNDEFINED, # Supported Flashpix version #p32
),
-
+
# Tags relating to Image Data Characteristics
'characteristics' => array(
- 'ColorSpace' => MW_EXIF_SHORT, # Color space information #p32
+ 'ColorSpace' => Exif::SHORT, # Color space information #p32
),
-
+
# Tags relating to image configuration
'configuration' => array(
- 'ComponentsConfiguration' => MW_EXIF_UNDEFINED, # Meaning of each component #p33
- 'CompressedBitsPerPixel' => MW_EXIF_RATIONAL, # Image compression mode
- 'PixelYDimension' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Valid image width
- 'PixelXDimension' => MW_EXIF_SHORT.','.MW_EXIF_LONG, # Valind image height
+ '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' => MW_EXIF_UNDEFINED, # Manufacturer notes
- 'UserComment' => MW_EXIF_UNDEFINED, # User comments #p34
+ 'MakerNote' => Exif::UNDEFINED, # Manufacturer notes
+ 'UserComment' => Exif::UNDEFINED, # User comments #p34
),
-
+
# Tags relating to related file information
'related' => array(
- 'RelatedSoundFile' => MW_EXIF_ASCII, # Related audio file
+ 'RelatedSoundFile' => Exif::ASCII, # Related audio file
),
-
+
# Tags relating to date and time
'dateandtime' => array(
- 'DateTimeOriginal' => MW_EXIF_ASCII, # Date and time of original data generation #p36
- 'DateTimeDigitized' => MW_EXIF_ASCII, # Date and time of original data generation
- 'SubSecTime' => MW_EXIF_ASCII, # DateTime subseconds
- 'SubSecTimeOriginal' => MW_EXIF_ASCII, # DateTimeOriginal subseconds
- 'SubSecTimeDigitized' => MW_EXIF_ASCII, # DateTimeDigitized subseconds
+ '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' => MW_EXIF_RATIONAL, # Exposure time
- 'FNumber' => MW_EXIF_RATIONAL, # F Number
- 'ExposureProgram' => MW_EXIF_SHORT, # Exposure Program #p38
- 'SpectralSensitivity' => MW_EXIF_ASCII, # Spectral sensitivity
- 'ISOSpeedRatings' => MW_EXIF_SHORT, # ISO speed rating
- 'OECF' => MW_EXIF_UNDEFINED, # Optoelectronic conversion factor
- 'ShutterSpeedValue' => MW_EXIF_SRATIONAL, # Shutter speed
- 'ApertureValue' => MW_EXIF_RATIONAL, # Aperture
- 'BrightnessValue' => MW_EXIF_SRATIONAL, # Brightness
- 'ExposureBiasValue' => MW_EXIF_SRATIONAL, # Exposure bias
- 'MaxApertureValue' => MW_EXIF_RATIONAL, # Maximum land aperture
- 'SubjectDistance' => MW_EXIF_RATIONAL, # Subject distance
- 'MeteringMode' => MW_EXIF_SHORT, # Metering mode #p40
- 'LightSource' => MW_EXIF_SHORT, # Light source #p40-41
- 'Flash' => MW_EXIF_SHORT, # Flash #p41-42
- 'FocalLength' => MW_EXIF_RATIONAL, # Lens focal length
- 'SubjectArea' => MW_EXIF_SHORT, # Subject area
- 'FlashEnergy' => MW_EXIF_RATIONAL, # Flash energy
- 'SpatialFrequencyResponse' => MW_EXIF_UNDEFINED, # Spatial frequency response
- 'FocalPlaneXResolution' => MW_EXIF_RATIONAL, # Focal plane X resolution
- 'FocalPlaneYResolution' => MW_EXIF_RATIONAL, # Focal plane Y resolution
- 'FocalPlaneResolutionUnit' => MW_EXIF_SHORT, # Focal plane resolution unit #p46
- 'SubjectLocation' => MW_EXIF_SHORT, # Subject location
- 'ExposureIndex' => MW_EXIF_RATIONAL, # Exposure index
- 'SensingMethod' => MW_EXIF_SHORT, # Sensing method #p46
- 'FileSource' => MW_EXIF_UNDEFINED, # File source #p47
- 'SceneType' => MW_EXIF_UNDEFINED, # Scene type #p47
- 'CFAPattern' => MW_EXIF_UNDEFINED, # CFA pattern
- 'CustomRendered' => MW_EXIF_SHORT, # Custom image processing #p48
- 'ExposureMode' => MW_EXIF_SHORT, # Exposure mode #p48
- 'WhiteBalance' => MW_EXIF_SHORT, # White Balance #p49
- 'DigitalZoomRatio' => MW_EXIF_RATIONAL, # Digital zoom ration
- 'FocalLengthIn35mmFilm' => MW_EXIF_SHORT, # Focal length in 35 mm film
- 'SceneCaptureType' => MW_EXIF_SHORT, # Scene capture type #p49
- 'GainControl' => MW_EXIF_RATIONAL, # Scene control #p49-50
- 'Contrast' => MW_EXIF_SHORT, # Contrast #p50
- 'Saturation' => MW_EXIF_SHORT, # Saturation #p50
- 'Sharpness' => MW_EXIF_SHORT, # Sharpness #p50
- 'DeviceSettingDescription' => MW_EXIF_UNDEFINED, # Desice settings description
- 'SubjectDistanceRange' => MW_EXIF_SHORT, # Subject distance range #p51
+ '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' => MW_EXIF_ASCII, # Unique image ID
+ 'ImageUniqueID' => Exif::ASCII, # Unique image ID
),
),
-
+
# GPS Attribute Information (p52)
'gps' => array(
- 'GPSVersionID' => MW_EXIF_BYTE, # GPS tag version
- 'GPSLatitudeRef' => MW_EXIF_ASCII, # North or South Latitude #p52-53
- 'GPSLatitude' => MW_EXIF_RATIONAL, # Latitude
- 'GPSLongitudeRef' => MW_EXIF_ASCII, # East or West Longitude #p53
- 'GPSLongitude' => MW_EXIF_RATIONAL, # Longitude
- 'GPSAltitudeRef' => MW_EXIF_BYTE, # Altitude reference
- 'GPSAltitude' => MW_EXIF_RATIONAL, # Altitude
- 'GPSTimeStamp' => MW_EXIF_RATIONAL, # GPS time (atomic clock)
- 'GPSSatellites' => MW_EXIF_ASCII, # Satellites used for measurement
- 'GPSStatus' => MW_EXIF_ASCII, # Receiver status #p54
- 'GPSMeasureMode' => MW_EXIF_ASCII, # Measurement mode #p54-55
- 'GPSDOP' => MW_EXIF_RATIONAL, # Measurement precision
- 'GPSSpeedRef' => MW_EXIF_ASCII, # Speed unit #p55
- 'GPSSpeed' => MW_EXIF_RATIONAL, # Speed of GPS receiver
- 'GPSTrackRef' => MW_EXIF_ASCII, # Reference for direction of movement #p55
- 'GPSTrack' => MW_EXIF_RATIONAL, # Direction of movement
- 'GPSImgDirectionRef' => MW_EXIF_ASCII, # Reference for direction of image #p56
- 'GPSImgDirection' => MW_EXIF_RATIONAL, # Direction of image
- 'GPSMapDatum' => MW_EXIF_ASCII, # Geodetic survey data used
- 'GPSDestLatitudeRef' => MW_EXIF_ASCII, # Reference for latitude of destination #p56
- 'GPSDestLatitude' => MW_EXIF_RATIONAL, # Latitude destination
- 'GPSDestLongitudeRef' => MW_EXIF_ASCII, # Reference for longitude of destination #p57
- 'GPSDestLongitude' => MW_EXIF_RATIONAL, # Longitude of destination
- 'GPSDestBearingRef' => MW_EXIF_ASCII, # Reference for bearing of destination #p57
- 'GPSDestBearing' => MW_EXIF_RATIONAL, # Bearing of destination
- 'GPSDestDistanceRef' => MW_EXIF_ASCII, # Reference for distance to destination #p57-58
- 'GPSDestDistance' => MW_EXIF_RATIONAL, # Distance to destination
- 'GPSProcessingMethod' => MW_EXIF_UNDEFINED, # Name of GPS processing method
- 'GPSAreaInformation' => MW_EXIF_UNDEFINED, # Name of GPS area
- 'GPSDateStamp' => MW_EXIF_ASCII, # GPS date
- 'GPSDifferential' => MW_EXIF_SHORT, # GPS differential correction
+ '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();
- $this->mRawExifData = exif_read_data( $file );
+ $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 );
}
-
+
/**#@+
- * @access private
+ * @private
*/
/**
* Generate a flat list of the exif tags
function makeFlatExifTags() {
$this->extractTags( $this->mExifTags );
}
-
+
/**
* A recursing extractor function used by makeFlatExifTags()
*
}
}
}
-
+
/**
* 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" );
}
}
- function makeFormattedData( $data = null ) {
+ /**
+ * @todo document
+ */
+ function makeFormattedData( ) {
$format = new FormatExif( $this->getFilteredData() );
$this->mFormattedExifData = $format->getFormattedData();
}
return $this->mFormattedExifData;
}
/**#@-*/
-
+
/**
* The version of the output format
*
*
* @return int
*/
- function version() {
+ 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
*
- * @access private
+ * @private
*
- * @param mixed $in The input value to check
+ * @param $in Mixed: the input value to check
* @return bool
*/
function isByte( $in ) {
- if ( sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) {
+ if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 255 ) {
$this->debug( $in, __FUNCTION__, true );
return true;
} else {
return false;
}
}
-
+
function isASCII( $in ) {
+ if ( is_array( $in ) ) {
+ return false;
+ }
+
if ( preg_match( "/[^\x0a\x20-\x7e]/", $in ) ) {
$this->debug( $in, __FUNCTION__, 'found a character not in our whitelist' );
return false;
}
-
- if ( preg_match( "/^\s*$/", $in ) ) {
+
+ if ( preg_match( '/^\s*$/', $in ) ) {
$this->debug( $in, __FUNCTION__, 'input consisted solely of whitespace' );
return false;
}
-
+
return true;
}
function isShort( $in ) {
- if ( sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) {
+ if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 65536 ) {
$this->debug( $in, __FUNCTION__, true );
return true;
} else {
}
function isLong( $in ) {
- if ( sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) {
+ if ( !is_array( $in ) && sprintf('%d', $in) == $in && $in >= 0 && $in <= 4294967296 ) {
$this->debug( $in, __FUNCTION__, true );
return true;
} else {
return false;
}
}
-
+
function isRational( $in ) {
- if ( @preg_match( "/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/", $in, $m ) ) { # Avoid division by zero
+ $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' );
}
function isUndefined( $in ) {
- if ( preg_match( "/^\d{4}$/", $in ) ) { // Allow ExifVersion and FlashpixVersion
+ if ( !is_array( $in ) && preg_match( '/^\d{4}$/', $in ) ) { // Allow ExifVersion and FlashpixVersion
$this->debug( $in, __FUNCTION__, true );
return true;
} else {
}
function isSrational( $in ) {
- if ( preg_match( "/^(\d+)\/(\d+[1-9]|[1-9]\d*)$/", $in, $m ) ) { # Avoid division by zero
+ $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' );
/**
* Validates if a tag has a legal value according to the Exif spec
*
- * @access private
+ * @private
*
- * @param string $tag The tag to check
- * @param mixed $val The value of the tag
+ * @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'";
- // Fucks up if not typecast
+ // Does not work if not typecast
switch( (string)$this->mFlatExifTags[$tag] ) {
- case (string)MW_EXIF_BYTE:
+ case (string)Exif::BYTE:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isByte( $val );
- case (string)MW_EXIF_ASCII:
+ case (string)Exif::ASCII:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isASCII( $val );
- case (string)MW_EXIF_SHORT:
+ case (string)Exif::SHORT:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isShort( $val );
- case (string)MW_EXIF_LONG:
+ case (string)Exif::LONG:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isLong( $val );
- case (string)MW_EXIF_RATIONAL:
+ case (string)Exif::RATIONAL:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isRational( $val );
- case (string)MW_EXIF_UNDEFINED:
+ case (string)Exif::UNDEFINED:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isUndefined( $val );
- case (string)MW_EXIF_SLONG:
+ case (string)Exif::SLONG:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isSlong( $val );
- case (string)MW_EXIF_SRATIONAL:
+ case (string)Exif::SRATIONAL:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isSrational( $val );
- case (string)MW_EXIF_SHORT.','.MW_EXIF_LONG:
+ case (string)Exif::SHORT.','.Exif::LONG:
$this->debug( $val, __FUNCTION__, $debug );
return $this->isShort( $val ) || $this->isLong( $val );
default:
}
/**
- * Conviniance function for debugging output
+ * Convenience function for debugging output
*
- * @access private
+ * @private
*
- * @param mixed $in
- * @param string $fname
- * @param mixed $action
+ * @param $in Mixed:
+ * @param $fname String:
+ * @param $action Mixed: , default NULL.
*/
- function debug( $in, $fname, $action = 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 );
-
+ $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");
+ wfDebugLog( $this->log, "$class::$fname: accepted: '$in' (type: $type)\n");
+ elseif ( $action === false )
+ wfDebugLog( $this->log, "$class::$fname: rejected: '$in' (type: $type)\n");
elseif ( $action === null )
- wfDebug( "$class::$fname: input was: '$in' (type: $type)\n");
+ wfDebugLog( $this->log, "$class::$fname: input was: '$in' (type: $type)\n");
else
- wfDebug( "$class::$fname: $action (type: $type; content: '$in')\n");
+ 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" );
+ }
}
}
/**
- * @package MediaWiki
- * @subpackage Metadata
+ * @todo document (e.g. one-sentence class-overview description)
+ * @addtogroup Media
*/
class FormatExif {
/**
* The Exif data to format
*
* @var array
- * @access private
+ * @private
*/
var $mExif;
-
+
/**
* Constructor
*
- * @param array $exif The Exif data to format ( as returned by
+ * @param $exif Array: 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
*/
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':
break;
}
break;
-
+
case 'PhotometricInterpretation':
switch( $val ) {
case 2: case 6:
break;
}
break;
-
+
case 'Orientation':
switch( $val ) {
case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8:
break;
}
break;
-
+
case 'PlanarConfiguration':
switch( $val ) {
case 1: case 2:
break;
}
break;
-
+
// TODO: YCbCrSubSampling
// TODO: YCbCrPositioning
-
+
case 'XResolution':
case 'YResolution':
switch( $resolutionunit ) {
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':
break;
}
break;
-
+
case 'ComponentsConfiguration':
switch( $val ) {
case 0: case 1: case 2: case 3: case 4: case 5: case 6:
break;
}
break;
-
+
case 'DateTime':
case 'DateTimeOriginal':
case 'DateTimeDigitized':
- $tags[$tag] = $wgLang->timeanddate( wfTimestamp(TS_MW, $val) );
+ 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:
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:
break;
}
break;
-
+
case 'LightSource':
switch( $val ) {
case 0: case 1: case 2: case 3: case 4: case 9: case 10: case 11:
break;
}
break;
-
+
// TODO: Flash
case 'FocalPlaneResolutionUnit':
switch( $val ) {
break;
}
break;
-
+
case 'SensingMethod':
switch( $val ) {
case 1: case 2: case 3: case 4: case 5: case 7: case 8:
break;
}
break;
-
+
case 'FileSource':
switch( $val ) {
case 3:
break;
}
break;
-
+
case 'SceneType':
switch( $val ) {
case 1:
break;
}
break;
-
+
case 'CustomRendered':
switch( $val ) {
case 0: case 1:
break;
}
break;
-
+
case 'ExposureMode':
switch( $val ) {
case 0: case 1: case 2:
break;
}
break;
-
+
case 'WhiteBalance':
switch( $val ) {
case 0: case 1:
break;
}
break;
-
+
case 'SceneCaptureType':
switch( $val ) {
case 0: case 1: case 2: case 3:
break;
}
break;
-
+
case 'GainControl':
switch( $val ) {
case 0: case 1: case 2: case 3: case 4:
break;
}
break;
-
+
case 'Contrast':
switch( $val ) {
case 0: case 1: case 2:
break;
}
break;
-
+
case 'Saturation':
switch( $val ) {
case 0: case 1: case 2:
break;
}
break;
-
+
case 'Sharpness':
switch( $val ) {
case 0: case 1: case 2:
break;
}
break;
-
+
case 'SubjectDistanceRange':
switch( $val ) {
case 0: case 1: case 2: case 3:
break;
}
break;
-
+
case 'GPSLatitudeRef':
case 'GPSDestLatitudeRef':
switch( $val ) {
break;
}
break;
-
+
case 'GPSLongitudeRef':
case 'GPSDestLongitudeRef':
switch( $val ) {
break;
}
break;
-
+
case 'GPSStatus':
switch( $val ) {
case 'A': case 'V':
break;
}
break;
-
+
case 'GPSMeasureMode':
switch( $val ) {
case 2: case 3:
break;
}
break;
-
+
case 'GPSSpeedRef':
case 'GPSDestDistanceRef':
switch( $val ) {
break;
}
break;
-
+
case 'GPSTrackRef':
case 'GPSImgDirectionRef':
case 'GPSDestBearingRef':
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 '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;
+
default:
$tags[$tag] = $this->formatNum( $val );
break;
}
/**
- * Conviniance function for getFormattedData()
+ * Convenience function for getFormattedData()
*
- * @access private
+ * @private
*
- * @param string $tag The tag name to pass on
- * @param string $val The value of the tag
- * @param string $arg An argument to pass ($1)
+ * @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 === '')
$val = 'value';
- return wfMsg( strtolower( "exif-$tag-$val" ), $arg );
+ return wfMsg( $wgContLang->lc( "exif-$tag-$val" ), $arg );
}
/**
* Format a number, convert numbers from fractions into floating point
* numbers
*
- * @access private
+ * @private
*
- * @param mixed $num The value to format
+ * @param $num Mixed: the value to format
* @return mixed A floating point number or whatever we were fed
*/
function formatNum( $num ) {
+ $m = array();
if ( preg_match( '/^(\d+)\/(\d+)$/', $num, $m ) )
return $m[2] != 0 ? $m[1] / $m[2] : $num;
else
return $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 $numerator / $gcd . '/' . $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;
+ }
}
+
+/**
+ * MW 1.6 compatibility
+ */
+define( 'MW_EXIF_BYTE', Exif::BYTE );
+define( 'MW_EXIF_ASCII', Exif::ASCII );
+define( 'MW_EXIF_SHORT', Exif::SHORT );
+define( 'MW_EXIF_LONG', Exif::LONG );
+define( 'MW_EXIF_RATIONAL', Exif::RATIONAL );
+define( 'MW_EXIF_UNDEFINED', Exif::UNDEFINED );
+define( 'MW_EXIF_SLONG', Exif::SLONG );
+define( 'MW_EXIF_SRATIONAL', Exif::SRATIONAL );
+
+
scripts.mit.edu / autoinstalls / mediawiki.git / blobdiff