diff options
Diffstat (limited to 'includes/media/JpegMetadataExtractor.php')
-rw-r--r-- | includes/media/JpegMetadataExtractor.php | 44 |
1 files changed, 36 insertions, 8 deletions
diff --git a/includes/media/JpegMetadataExtractor.php b/includes/media/JpegMetadataExtractor.php index 224b4a2b..8d7e43b9 100644 --- a/includes/media/JpegMetadataExtractor.php +++ b/includes/media/JpegMetadataExtractor.php @@ -1,10 +1,34 @@ <?php /** -* Class for reading jpegs and extracting metadata. -* see also BitmapMetadataHandler. -* -* Based somewhat on GIFMetadataExtrator. -*/ + * Extraction of JPEG image metadata. + * + * 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 + * + * @file + * @ingroup Media + */ + +/** + * Class for reading jpegs and extracting metadata. + * see also BitmapMetadataHandler. + * + * Based somewhat on GIFMetadataExtrator. + * + * @ingroup Media + */ class JpegMetadataExtractor { const MAX_JPEG_SEGMENTS = 200; @@ -143,13 +167,17 @@ class JpegMetadataExtractor { /** * Helper function for jpegSegmentSplitter * @param &$fh FileHandle for jpeg file - * @return data content of segment. + * @return string data content of segment. */ private static function jpegExtractMarker( &$fh ) { $size = wfUnpack( "nint", fread( $fh, 2 ), 2 ); - if ( $size['int'] <= 2 ) throw new MWException( "invalid marker size in jpeg" ); + if ( $size['int'] <= 2 ) { + throw new MWException( "invalid marker size in jpeg" ); + } $segment = fread( $fh, $size['int'] - 2 ); - if ( strlen( $segment ) !== $size['int'] - 2 ) throw new MWException( "Segment shorter than expected" ); + if ( strlen( $segment ) !== $size['int'] - 2 ) { + throw new MWException( "Segment shorter than expected" ); + } return $segment; } |