Olympus.php:
<?
//================================================================================================
//================================================================================================
//================================================================================================
/*
Exifer
Extracts EXIF information from digital photos.
Copyright © 2003 Jake Olefsky
http://www.offsky.com/software/exif/index.php
jake <at> olefsky <dot> com
Please see exif.php for the complete information about this software.
------------
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. http://www.gnu.org/copyleft/gpl.html
*/
//================================================================================================
//================================================================================================
//================================================================================================
//=================
// Looks up the name of the tag for the MakerNote (Depends on Manufacturer)
//====================================================================
function lookup_Olympus_tag($tag) {
switch($tag) {
case "0200": $tag = "SpecialMode";break;
case "0201": $tag = "JpegQual";break;
case "0202": $tag = "Macro";break;
case "0203": $tag = "Unknown1";break;
case "0204": $tag = "DigiZoom";break;
case "0205": $tag = "Unknown2";break;
case "0206": $tag = "Unknown3";break;
case "0207": $tag = "SoftwareRelease";break;
case "0208": $tag = "PictInfo";break;
case "0209": $tag = "CameraID";break;
case "0f00": $tag = "DataDump";break;
default: $tag = "unknown:".$tag;break;
}
return $tag;
}
//=================
// Formats Data for the data type
//====================================================================
function formatOlympusData($type, $tag, $intel, $data) {
if($type=="ASCII") {
} else if($type=="URATIONAL" || $type=="SRATIONAL") {
$data = bin2hex($data);
if($intel==1) $data = intel2Moto($data);
$top = hexdec(substr($data, 8, 8));
$bottom = hexdec(substr($data, 0, 8));
if($bottom!=0) $data=$top/$bottom;
else if($top==0) $data = 0;
else $data=$top."/".$bottom;
if($tag=="0204") { //DigitalZoom
$data=$data."x";
}
if($tag=="0205") { //Unknown2
$data=$top."/".$bottom;
}
} else if($type=="USHORT" || $type=="SSHORT" || $type=="ULONG" || $type=="SLONG" || $type=="FLOAT" || $type=="DOUBLE") {
$data = bin2hex($data);
if($intel==1) $data = intel2Moto($data);
$data=hexdec($data);
if($tag=="0201") { //JPEGQuality
if($data == 1) $data = "SQ";
else if($data == 2) $data = "HQ";
else if($data == 3) $data = "SHQ";
else $data = "Unknown: ".$data;
}
if($tag=="0202") { //Macro
if($data == 0) $data = "Normal";
else if($data == 1) $data = "Macro";
else $data = "Unknown: ".$data;
}
} else if($type=="UNDEFINED") {
} else {
$data = bin2hex($data);
if($intel==1) $data = intel2Moto($data);
}
return $data;
}
//=================
// Olympus Special data section
//====================================================================
function parseOlympus($block, &$result, $seek, $globalOffset) {
if($result['Endien']=="Intel") $intel=1;
else $intel=0;
$model = $result['IFD0']['Model'];
$place=8; //current place
$offset=8;
//Get number of tags (2 bytes)
$num = bin2hex(substr($block, $place, 2));$place+=2;
if($intel==1) $num = intel2Moto($num);
$result['SubIFD']['MakerNote']['MakerNoteNumTags'] = hexdec($num);
//loop thru all tags Each field is 12 bytes
for($i=0;$i<hexdec($num);$i++) {
//2 byte tag
$tag = bin2hex(substr($block, $place, 2));$place+=2;
if($intel==1) $tag = intel2Moto($tag);
$tag_name = lookup_Olympus_tag($tag);
//2 byte type
$type = bin2hex(substr($block, $place, 2));$place+=2;
if($intel==1) $type = intel2Moto($type);
lookup_type($type, $size);
//4 byte count of number of data units
$count = bin2hex(substr($block, $place, 4));$place+=4;
if($intel==1) $count = intel2Moto($count);
$bytesofdata = $size*hexdec($count);
//4 byte value of data or pointer to data
$value = substr($block, $place, 4);$place+=4;
if($bytesofdata<=4) {
$data = $value;
} else {
$value = bin2hex($value);
if($intel==1) $value = intel2Moto($value);
$v = fseek($seek, $globalOffset+hexdec($value)); //offsets are from TIFF header which is 12 bytes from the start of the file
if($v==0) {
$data = fread($seek, $bytesofdata);
} else if($v==-1) {
$result['Errors'] = $result['Errors']++;
}
}
$formated_data = formatOlympusData($type, $tag, $intel, $data);
if($result['VerboseOutput']==1) {
$result['SubIFD']['MakerNote'][$tag_name] = $formated_data;
if($type=="URATIONAL" || $type=="SRATIONAL" || $type=="USHORT" || $type=="SSHORT" || $type=="ULONG" || $type=="SLONG" || $type=="FLOAT" || $type=="DOUBLE") {
$data = bin2hex($data);
if($intel==1) $data = intel2Moto($data);
}
$result['SubIFD']['MakerNote'][$tag_name."_Verbose"]['RawData'] = $data;
$result['SubIFD']['MakerNote'][$tag_name."_Verbose"]['Type'] = $type;
$result['SubIFD']['MakerNote'][$tag_name."_Verbose"]['Bytes'] = $bytesofdata;
} else {
$result['SubIFD']['MakerNote'][$tag_name] = $formated_data;
}
}
}
?>
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