120 lines
4.2 KiB
PHP
120 lines
4.2 KiB
PHP
<?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 $JPEG_TOOLKIT.'Makernotes/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
|
|
******************************************************************************/
|
|
|
|
|
|
?>
|