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Diffstat (limited to 'includes/jpeg_metadata_tk/Makernotes/epson.php')
| -rw-r--r-- | includes/jpeg_metadata_tk/Makernotes/epson.php | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/includes/jpeg_metadata_tk/Makernotes/epson.php b/includes/jpeg_metadata_tk/Makernotes/epson.php new file mode 100644 index 0000000..16057bb --- /dev/null +++ b/includes/jpeg_metadata_tk/Makernotes/epson.php @@ -0,0 +1,119 @@ +<?php + +/****************************************************************************** +* +* Filename: epson.php +* +* Description: Epson Makernote Parser +* Provides functions to decode an Epson EXIF makernote and to interpret +* the resulting array into html. +* +* Epson Makernote Format: +* +* Field Size Description +* ---------------------------------------------------------------- +* Header 8 Bytes "EPSON\x00\x01\x00" +* IFD Data Variable Standard IFD Data using Olympus Tags +* ---------------------------------------------------------------- +* +* +* Author: Evan Hunter +* +* Date: 30/7/2004 +* +* Project: JPEG Metadata +* +* Revision: 1.00 +* +* URL: http://electronics.ozhiker.com +* +* Copyright: Copyright Evan Hunter 2004 +* This file may be used freely for non-commercial purposes.For +* commercial uses please contact the author: evan@ozhiker.com +* +******************************************************************************/ + + +// Epson makernote uses Olympus tags - ensure they are included + +include_once 'olympus.php'; + + + + +// Add the Parser function to the list of Makernote Parsers. (Interpreter Functions are supplied by the Olympus script) + +$GLOBALS['Makernote_Function_Array']['Read_Makernote_Tag'][] = "get_Epson_Makernote"; + + + + + +/****************************************************************************** +* +* Function: get_Epson_Makernote +* +* Description: Decodes the Makernote tag and returns the new tag with the decoded +* information attached. Returns false if this is not a makernote +* that can be processed with this script +* +* Parameters: Makernote_Tag - the element of an EXIF array containing the +* makernote, as returned from get_EXIF_JPEG +* EXIF_Array - the entire EXIF array containing the +* makernote, as returned from get_EXIF_JPEG, in +* case more information is required for decoding +* filehnd - an open file handle for the file containing the +* makernote - does not have to be positioned at the +* start of the makernote +* Make_Field - The contents of the EXIF Make field, to aid +* determining whether this script can decode +* the makernote +* +* +* Returns: Makernote_Tag - the Makernote_Tag from the parameters, but +* modified to contain the decoded information +* FALSE - If this script could not decode the makernote, or if +* an error occured in decoding +* +******************************************************************************/ + +function get_Epson_Makernote( $Makernote_Tag, $EXIF_Array, $filehnd, $Make_Field ) +{ + + // Check if the Make Field contains the word Epson + if ( stristr( $Make_Field, "Epson" ) === FALSE ) + { + return FALSE; + } + + // Check if the header exists at the start of the Makernote + if ( substr( $Makernote_Tag['Data'], 0, 8 ) != "EPSON\x00\x01\x00" ) + { + // This isn't a Epson Makernote, abort + return FALSE ; + } + + + // Seek to the start of the IFD + fseek($filehnd, $Makernote_Tag['Tiff Offset'] + $Makernote_Tag['Offset'] + 8 ); + + // Read the IFD(s) into an array + $Makernote_Tag['Decoded Data'] = read_Multiple_IFDs( $filehnd, $Makernote_Tag['Tiff Offset'], $Makernote_Tag['ByteAlign'], "Olympus" ); + + // Save some information into the Tag element to aid interpretation + $Makernote_Tag['Decoded'] = TRUE; + $Makernote_Tag['Makernote Type'] = "Epson"; + $Makernote_Tag['Makernote Tags'] = "Olympus"; + + + // Return the new tag + return $Makernote_Tag; + +} + +/****************************************************************************** +* End of Function: get_Epson_Makernote +******************************************************************************/ + + +?> |