From 37d90e663ca75fdf441d449799fc94a5e467b4a7 Mon Sep 17 00:00:00 2001
From: Tim Almdal <tnalmdal@shaw.ca>
Date: Sat, 7 Feb 2009 21:44:19 +0000
Subject: Adding exifer library

---
 modules/exif/lib/makers/olympus.php | 196 ++++++++++++++++++++++++++++++++++++
 1 file changed, 196 insertions(+)
 create mode 100644 modules/exif/lib/makers/olympus.php

(limited to 'modules/exif/lib/makers/olympus.php')

diff --git a/modules/exif/lib/makers/olympus.php b/modules/exif/lib/makers/olympus.php
new file mode 100644
index 00000000..bc7df6e4
--- /dev/null
+++ b/modules/exif/lib/makers/olympus.php
@@ -0,0 +1,196 @@
+<?php //================================================================================================
+//================================================================================================
+//================================================================================================
+/*
+	Exifer
+	Extracts EXIF information from digital photos.
+	
+	Copyright � 2003 Jake Olefsky
+	http://www.offsky.com/software/exif/index.php
+	jake@olefsky.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 $data = gettext("Unknown").": ".$data;
+		}
+		if($tag=="0202") { //Macro
+			if($data == 0) $data = "Normal";
+			else if($data == 1) $data = "Macro";
+			else $data = gettext("Unknown").": ".$data;
+		}
+	} else if($type=="UNDEFINED") {
+		
+	} else {
+		$data = bin2hex($data);
+		if($intel==1) $data = intel2Moto($data);
+	}
+	
+	return $data;
+}
+
+
+
+//==============================================================================
+// Olympus Special data section
+// - Updated by Zenphoto for new header tag in E-410/E-510/E-3 cameras. 2/24/2008
+//==============================================================================
+function parseOlympus($block, &$result, $seek, $globalOffset) {	
+		
+	if($result['Endien']=="Intel") $intel = 1;
+	else $intel = 0;
+	
+	$model = $result['IFD0']['Model'];
+	
+	// New header for new DSLRs - Check for it because the
+	// number of bytes that count the IFD fields differ in each case.
+	// Fixed by Zenphoto 2/24/08
+	$new = false;
+	if (substr($block, 0, 8) == "OLYMPUS\x00") {
+		$new = true;
+	} else if (substr($block, 0, 7) == "OLYMP\x00\x01"
+		|| substr($block, 0, 7) == "OLYMP\x00\x02") {
+		$new = false;
+	} else {
+		// Header does not match known Olympus headers.
+		// This is not a valid OLYMPUS Makernote.
+		return false;
+	}
+	
+	// Offset of IFD entry after Olympus header.
+	$place = 8;
+	$offset = 8;
+	
+	// Get number of tags (1 or 2 bytes, depending on New or Old makernote)
+	$countfieldbits = $new ? 1 : 2;
+	// New makernote repeats 1-byte value twice, so increment $place by 2 in either case.
+	$num = bin2hex(substr($block, $place, $countfieldbits)); $place += 2;
+	if ($intel == 1) $num = intel2Moto($num);
+	$ntags = hexdec($num);
+	$result['SubIFD']['MakerNote']['MakerNoteNumTags'] = $ntags;
+	
+	//loop thru all tags  Each field is 12 bytes
+	for($i=0; $i < $ntags; $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(isset($GLOBALS['exiferFileSize']) && $v == 0 && $bytesofdata < $GLOBALS['exiferFileSize']) {
+				$data = fread($seek, $bytesofdata);
+			} else {
+				$result['Errors'] = $result['Errors']++;
+				$data = '';
+			}
+		}
+		$formated_data = formatOlympusData($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;
+		}
+	}
+}
+
+
+?>
\ No newline at end of file
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