/lib/exif/php-jpg/Makernotes/Pentax.php
PHP | 353 lines | 115 code | 84 blank | 154 comment | 7 complexity | f288f3b5c2cb04772d96804d729adc91 MD5 | raw file
Possible License(s): AGPL-1.0, Apache-2.0, GPL-2.0, LGPL-2.1
- <?php
-
- /******************************************************************************
- *
- * Filename: pentax.php
- *
- * Description: Pentax (Asahi) Makernote Parser
- * Provides functions to decode an Pentax (Asahi) EXIF makernote and to interpret
- * the resulting array into html.
- *
- * Pentax Makernote Format:
- *
- * Type 1
- *
- * Field Size Description
- * ----------------------------------------------------------------
- * IFD Data Variable NON-Standard IFD Data using Pentax 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
- * ----------------------------------------------------------------
- *
- *
- * Type 2
- *
- * Field Size Description
- * ----------------------------------------------------------------
- * Header 4 Bytes "AOC\x00"
- * Unknown 2 Bytes Unknown field
- * IFD Data Variable NON-Standard IFD Data using Casio Type 2 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
- *
- ******************************************************************************/
-
-
- // Pentax Type 2 makernote uses Casio Type 2 tags - ensure they are included
-
- include_once 'casio.php';
-
-
-
- // Add the parser and interpreter functions to the list of Makernote parsers and interpreters.
-
- $GLOBALS['Makernote_Function_Array']['Read_Makernote_Tag'][] = "get_Pentax_Makernote";
- $GLOBALS['Makernote_Function_Array']['get_Makernote_Text_Value'][] = "get_Pentax_Text_Value";
- $GLOBALS['Makernote_Function_Array']['Interpret_Makernote_to_HTML'][] = "get_Pentax_Makernote_Html";
-
-
-
-
-
-
-
- /******************************************************************************
- *
- * Function: get_Pentax_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_Pentax_Makernote( $Makernote_Tag, $EXIF_Array, $filehnd, $Make_Field )
- {
- // Check if the Make Field contains the word Pentax or Asahi
- if ( ( stristr( $Make_Field, "Pentax" ) === FALSE ) &&
- ( stristr( $Make_Field, "Asahi" ) === FALSE ) )
- {
- // Couldn't find Pentax or Asahi in the maker - abort
- return FALSE;
- }
-
- // Check if the header exists at the start of the Makernote
- if ( substr( $Makernote_Tag['Data'], 0, 4 ) == "AOC\x00" )
- {
- // Type 2 Pentax Makernote
-
- // Seek to the start of the IFD
- fseek($filehnd, $Makernote_Tag['Tiff Offset'] + $Makernote_Tag['Offset'] + 6 );
-
- // Read the IFD(s) into an array
- $Makernote_Tag['Decoded Data'] = read_Multiple_IFDs( $filehnd, $Makernote_Tag['Tiff Offset'], $Makernote_Tag['ByteAlign'], "Casio Type 2" );
-
- // Save some information into the Tag element to aid interpretation
- $Makernote_Tag['Decoded'] = TRUE;
- $Makernote_Tag['Makernote Type'] = "Casio Type 2";
- $Makernote_Tag['Makernote Tags'] = "Casio Type 2";
-
- // Return the new tag
- return $Makernote_Tag;
- }
- else
- {
- // Type 1 Penax Makernote
-
- // Seek to the start of the IFD
- fseek($filehnd, $Makernote_Tag['Tiff Offset'] + $Makernote_Tag['Offset'] + 0 );
-
- // Read the IFD(s) into an array
- $Makernote_Tag['Decoded Data'] = read_Multiple_IFDs( $filehnd, $Makernote_Tag['Tiff Offset'], $Makernote_Tag['ByteAlign'], "Pentax" );
-
- // Save some information into the Tag element to aid interpretation
- $Makernote_Tag['Decoded'] = TRUE;
- $Makernote_Tag['Makernote Type'] = "Pentax";
- $Makernote_Tag['Makernote Tags'] = "Pentax";
-
- // Return the new tag
- return $Makernote_Tag;
- }
-
-
- // Shouldn't get here
- return FALSE;
- }
-
- /******************************************************************************
- * End of Function: get_Pentax_Makernote
- ******************************************************************************/
-
-
-
-
-
-
-
- /******************************************************************************
- *
- * Function: get_Pentax_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_Pentax_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_Pentax_Text_Value( $Exif_Tag, $Tag_Definitions_Name )
- {
- // Check that this tag uses the Pentax tags, otherwise it can't be interpreted here
- if ( $Tag_Definitions_Name == "Pentax" )
- {
- // No Special Tags so far
- return FALSE;
- }
-
- return FALSE;
- }
-
- /******************************************************************************
- * End of Function: get_Pentax_Text_Value
- ******************************************************************************/
-
-
-
-
-
-
- /******************************************************************************
- *
- * Function: get_Pentax_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_Pentax_Makernote_Html( $Makernote_tag, $filename )
- {
- // Check that this is a Pentax type makernote
- if ( $Makernote_tag['Makernote Type'] != "Pentax" )
- {
- // Not a Pentax makernote - abort
- return False;
- }
-
- // Interpret the IFD and return the html
- return interpret_IFD( $Makernote_tag['Decoded Data'][0], $filename );
-
- }
-
- /******************************************************************************
- * End of Function: get_Pentax_Makernote_Html
- ******************************************************************************/
-
-
-
-
-
-
-
-
-
-
- /******************************************************************************
- * Global Variable: IFD_Tag_Definitions, Pentax
- *
- * Contents: This global variable provides definitions of the known Pentax Type 1
- * Makernote tags, indexed by their tag number.
- *
- ******************************************************************************/
-
- $GLOBALS[ "IFD_Tag_Definitions" ]["Pentax"] = array(
-
-
- 0x0001 => array( 'Name' => "Capture Mode",
- 'Type' => "Lookup",
- 0 => "Auto",
- 1 => "Night-scene",
- 2 => "Manual",
- 4 => "Multiple" ),
-
- 0x0002 => array( 'Name' => "Quality Level",
- 'Type' => "Lookup",
- 0 => "Good",
- 1 => "Better",
- 2 => "Best" ),
-
- 0x0003 => array( 'Name' => "Focus Mode",
- 'Type' => "Lookup",
- 2 => "Custom",
- 3 => "Auto" ),
-
- 0x0004 => array( 'Name' => "Flash Mode",
- 'Type' => "Lookup",
- 1 => "Auto",
- 2 => "Flash on",
- 4 => "Flash off",
- 6 => "Red-eye Reduction" ),
-
- 0x0007 => array( 'Name' => "White Balance",
- 'Type' => "Lookup",
- 0 => "Auto",
- 1 => "Daylight",
- 2 => "Shade",
- 3 => "Tungsten",
- 4 => "Fluorescent",
- 5 => "Manual" ),
-
-
- 0x000a => array( 'Name' => "Digital Zoom",
- 'Type' => "Numeric",
- 'Units' => " (0 = Off)" ),
-
- 0x000b => array( 'Name' => "Sharpness",
- 'Type' => "Lookup",
- 0 => "Normal",
- 1 => "Soft",
- 2 => "Hard" ),
-
- 0x000c => array( 'Name' => "Contrast",
- 'Type' => "Lookup",
- 0 => "Normal",
- 1 => "Low",
- 2 => "High" ),
-
- 0x000d => array( 'Name' => "Saturation",
- 'Type' => "Lookup",
- 0 => "Normal",
- 1 => "Low",
- 2 => "High" ),
-
- 0x0014 => array( 'Name' => "ISO Speed",
- 'Type' => "Lookup",
- 10 => "100",
- 16 => "200",
- 100 => "100",
- 200 => "200" ),
-
- 0x0017 => array( 'Name' => "Colour",
- 'Type' => "Lookup",
- 1 => "Normal",
- 2 => "Black & White",
- 3 => "Sepia" ),
-
- 0x0e00 => array( 'Name' => "Print Image Matching Info",
- 'Type' => "PIM" ),
-
- 0x1000 => array( 'Name' => "Time Zone",
- 'Type' => "String" ),
-
- 0x1001 => array( 'Name' => "Daylight Savings",
- 'Type' => "String" ),
-
-
-
-
-
- );
-
- /******************************************************************************
- * End of Global Variable: IFD_Tag_Definitions, Pentax
- ******************************************************************************/
-
-
-
- ?>