/lib/exif/php-jpg/Makernotes/kyocera.php

<?php



/******************************************************************************

*

* Filename:     kyocera.php

*

* Description:  Kyocera Makernote Parser

*               Provides functions to decode an Kyocera EXIF makernote and to interpret

*               the resulting array into html. Includes Kyocera's Contax brand

*

*               Kyocera Makernote Format:

*

*               Field           Size            Description

*               ----------------------------------------------------------------

*               Header          22 Bytes        "KYOCERA            \x00\x00\x00"

*               IFD Data        Variable        NON-Standard IFD Data using Kyocera Tags

*                                               IFD has no Next-IFD pointer at end of IFD,

*                                               and Offsets are relative to the start

*                                               of the current IFD tag, not the TIFF header

*               ----------------------------------------------------------------

*

*

*

* 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

*

******************************************************************************/





// Add the parser and interpreter functions to the list of Makernote parsers and interpreters.



$GLOBALS['Makernote_Function_Array']['Read_Makernote_Tag'][] = "get_Kyocera_Makernote";

$GLOBALS['Makernote_Function_Array']['get_Makernote_Text_Value'][] = "get_Kyocera_Text_Value";

$GLOBALS['Makernote_Function_Array']['Interpret_Makernote_to_HTML'][] = "get_Kyocera_Makernote_Html";









/******************************************************************************

*

* Function:     get_Kyocera_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_Kyocera_Makernote( $Makernote_Tag, $EXIF_Array, $filehnd, $Make_Field )

{



        // Check if the Make Field contains the word Contax or Kyocera

        if ( ( stristr( $Make_Field, "Contax" ) === FALSE ) &&

             ( stristr( $Make_Field, "Kyocera" ) === FALSE ) )

        {

                // Kyocera or Contax not found in maker field - abort

                return FALSE;

        }





        // Check if the header exists at the start of the Makernote

        if ( substr( $Makernote_Tag['Data'], 0, 22 ) != "KYOCERA            \x00\x00\x00" )

        {

                // This isn't a Kyocera Makernote, abort

                return FALSE ;

        }





        // Seek to the start of the IFD

        fseek($filehnd, $Makernote_Tag['Tiff Offset'] + $Makernote_Tag['Offset'] + 22 );



        // Read the IFD(s) into an array

        $Makernote_Tag['Decoded Data'] = read_Multiple_IFDs( $filehnd, $Makernote_Tag['Tiff Offset'], $Makernote_Tag['ByteAlign'], "Kyocera", True, False );



        // Save some information into the Tag element to aid interpretation

        $Makernote_Tag['Decoded'] = TRUE;

        $Makernote_Tag['Makernote Type'] = "Kyocera";

        $Makernote_Tag['Makernote Tags'] = "Kyocera";





        // Return the new tag

        return $Makernote_Tag;

}



/******************************************************************************

* End of Function:     get_Kyocera_Makernote

******************************************************************************/













/******************************************************************************

*

* Function:     get_Kyocera_Text_Value

*

* Description:  Provides a text value for any tag marked as special for makernotes

*               that this script can decode. Returns false if this is not a makernote

*               that can be processed with this script

*

* Parameters:   Exif_Tag - the element of an the Makernote array containing the

*                          tag in question, as returned from get_Kyocera_Makernote

*               Tag_Definitions_Name - The name of the Tag Definitions group

*                                      within the global array IFD_Tag_Definitions

*

*

* Returns:      output - the text value for the tag

*               FALSE - If this script could not decode the makernote, or if

*                       an error occured in decoding

*

******************************************************************************/



function get_Kyocera_Text_Value( $Exif_Tag, $Tag_Definitions_Name )

{

        // Check that this tag uses Kyocera tags, otherwise it can't be interpreted here

        if ( $Tag_Definitions_Name == "Kyocera" )

        {

                // No Special Kyocera tags so far

                return FALSE;

        }



        return FALSE;



}



/******************************************************************************

* End of Function:     get_Kyocera_Text_Value

******************************************************************************/

















/******************************************************************************

*

* Function:     get_Kyocera_Makernote_Html

*

* Description:  Attempts to interpret a makernote into html. Returns false if

*               it 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

*               filename - the name of the JPEG file being processed ( used

*                          by scripts which display embedded thumbnails)

*

*

* Returns:      output - the html representing the makernote

*               FALSE - If this script could not interpret the makernote, or if

*                       an error occured in decoding

*

******************************************************************************/



function get_Kyocera_Makernote_Html( $Makernote_tag, $filename )

{



        // Check that this is a Kyocera Makernote, otherwise it can't be interpreted here

        if ( $Makernote_tag['Makernote Type'] != "Kyocera" )

        {

                // Not a Kyocera Makernote - cannot interpret it - abort

                return False;

        }



        // Interpret the IFD and return the HTML

        return interpret_IFD( $Makernote_tag['Decoded Data'][0], $filename );



}



/******************************************************************************

* End of Function:     get_Kyocera_Makernote_Html

******************************************************************************/

















/******************************************************************************

* Global Variable:      IFD_Tag_Definitions, Kyocera

*

* Contents:     This global variable provides definitions of the known Kyocera

*               Makernote tags, indexed by their tag number.

*

******************************************************************************/



$GLOBALS[ "IFD_Tag_Definitions" ]["Kyocera"] = array(



1 => array(             'Name' => "Kyocera Proprietory Format Thumbnail",

                        'Type' => "Unknown" ),



0x0E00 => array(        'Name' => "Print Image Matching Info",

                        'Type' => "PIM" ),



);



/******************************************************************************

* End of Global Variable:     IFD_Tag_Definitions, Kyocera

******************************************************************************/

















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