<?php
/*************************
  Coppermine Photo Gallery
  ************************
  Copyright (c) 2003-2007 Coppermine Dev Team
  v1.1 originally written by Gregory DEMAR

  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.
  ********************************************
  Coppermine version: 1.4.12
  $Source$
  $Revision: 3636 $
  $Author: gaugau $
  $Date: 2007-06-29 11:35:30 +0200 (Fr, 29 Jun 2007) $
**********************************************/

/*

        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_Nikon_tag($tag,$model) {



        if($model==0) {

                switch($tag) {

                        case "0003": $tag = "Quality";break;

                        case "0004": $tag = "ColorMode";break;

                        case "0005": $tag = "ImageAdjustment";break;

                        case "0006": $tag = "CCDSensitivity";break;

                        case "0007": $tag = "WhiteBalance";break;

                        case "0008": $tag = "Focus";break;

                        case "0009": $tag = "Unknown2";break;

                        case "000a": $tag = "DigitalZoom";break;

                        case "000b": $tag = "Converter";break;



                        default: $tag = "unknown:".$tag;break;

                }

        } else if($model==1) {

                switch($tag) {

                        case "0002": $tag = "ISOSetting";break;

                        case "0003": $tag = "ColorMode";break;

                        case "0004": $tag = "Quality";break;

                        case "0005": $tag = "Whitebalance";break;

                        case "0006": $tag = "ImageSharpening";break;

                        case "0007": $tag = "FocusMode";break;

                        case "0008": $tag = "FlashSetting";break;

                        case "0009": $tag = "FlashMode";break;

                        case "000b": $tag = "WhiteBalanceFine";break;

                        case "000f": $tag = "ISOSelection";break;

                        case "0013": $tag = "ISOSelection2";break;

                        case "0080": $tag = "ImageAdjustment";break;

                        case "0081": $tag = "ToneCompensation";break;

                        case "0082": $tag = "Adapter";break;

                        case "0083": $tag = "LensType";break;

                        case "0084": $tag = "LensInfo";break;

                        case "0085": $tag = "ManualFocusDistance";break;

                        case "0086": $tag = "DigitalZoom";break;

                        case "0087": $tag = "FlashUsed";break;

                        case "0088": $tag = "AFFocusPosition";break;

                        case "008d": $tag = "ColorMode";break;

                        case "0090": $tag = "LightType";break;

                        case "0094": $tag = "Saturation";break;

                        case "0095": $tag = "NoiseReduction";break;

                        case "0010": $tag = "DataDump";break;



                        default: $tag = "unknown:".$tag;break;

                }

        }



        return $tag;

}



//=================

// Formats Data for the data type

//====================================================================

function formatNikonData($type,$tag,$intel,$model,$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=="0085" && $model==1) { //ManualFocusDistance

                        $data=$data." m";

                }

                if($tag=="0086" && $model==1) { //DigitalZoom

                        $data=$data."x";

                }

                if($tag=="000a" && $model==0) { //DigitalZoom

                        $data=$data."x";

                }

        } 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=="0003" && $model==0) { //Quality

                        if($data == 1) $data = "VGA Basic";

                        else if($data == 2) $data = "VGA Normal";

                        else if($data == 3) $data = "VGA Fine";

                        else if($data == 4) $data = "SXGA Basic";

                        else if($data == 5) $data = "SXGA Normal";

                        else if($data == 6) $data = "SXGA Fine";

                        else $data = "Unknown: ".$data;

                }

                if($tag=="0004" && $model==0) { //Color

                        if($data == 1) $data = "Color";

                        else if($data == 2) $data = "Monochrome";

                        else $data = "Unknown: ".$data;

                }

                if($tag=="0005" && $model==0) { //Image Adjustment

                        if($data == 0) $data = "Normal";

                        else if($data == 1) $data = "Bright+";

                        else if($data == 2) $data = "Bright-";

                        else if($data == 3) $data = "Contrast+";

                        else if($data == 4) $data = "Contrast-";

                        else $data = "Unknown: ".$data;

                }

                if($tag=="0006" && $model==0) { //CCD Sensitivity

                        if($data == 0) $data = "ISO-80";

                        else if($data == 2) $data = "ISO-160";

                        else if($data == 4) $data = "ISO-320";

                        else if($data == 5) $data = "ISO-100";

                        else $data = "Unknown: ".$data;

                }

                if($tag=="0007" && $model==0) { //White Balance

                        if($data == 0) $data = "Auto";

                        else if($data == 1) $data = "Preset";

                        else if($data == 2) $data = "Daylight";

                        else if($data == 3) $data = "Incandescense";

                        else if($data == 4) $data = "Flourescence";

                        else if($data == 5) $data = "Cloudy";

                        else if($data == 6) $data = "SpeedLight";

                        else $data = "Unknown: ".$data;

                }

                if($tag=="000b" && $model==0) { //Converter

                        if($data == 0) $data = "None";

                        else if($data == 1) $data = "Fisheye";

                        else $data = "Unknown: ".$data;

                }

        } else if($type=="UNDEFINED") {



                if($tag=="0001" && $model==1) { //Unknown (Version?)

                        $data=$data/100;

                }

                if($tag=="0088" && $model==1) { //AF Focus Position

                        $temp = "Center";

                        $data = bin2hex($data);

                        $data = str_replace("01","Top",$data);

                        $data = str_replace("02","Bottom",$data);

                        $data = str_replace("03","Left",$data);

                        $data = str_replace("04","Right",$data);

                        $data = str_replace("00","",$data);

                        if(strlen($data)==0) $data = $temp;

                }



        } else {

                $data = bin2hex($data);

                if($intel==1) $data = intel2Moto($data);



                if($tag=="0083" && $model==1) { //Lens Type

                    $data = hexdec(substr($data,0,2));

                        if($data == 0) $data = "AF non D";

                        else if($data == 1) $data = "Manual";

                        else if($data == 2) $data = "AF-D or AF-S";

                        else if($data == 6) $data = "AF-D G";

                        else if($data == 10) $data = "AF-D VR";

                        else $data = "Unknown: ".$data;

                }

                if($tag=="0087" && $model==1) { //Flash type

                    $data = hexdec(substr($data,0,2));

                        if($data == 0) $data = "Did Not Fire";

                        else if($data == 4) $data = "Unknown";

                        else if($data == 7) $data = "External";

                        else if($data == 9) $data = "On Camera";

                        else $data = "Unknown: ".$data;

                }

        }



        return $data;

}





//=================

// Nikon Special data section

//====================================================================

function parseNikon($block,&$result) {



        if($result['Endien']=="Intel") $intel=1;

        else $intel=0;



        $model = $result['IFD0']['Model'];



        //these 6 models start with "Nikon".  Other models dont.

        if($model=="E700\0" || $model=="E800\0" || $model=="E900\0" || $model=="E900S\0" || $model=="E910\0" || $model=="E950\0") {

                $place=8; //current place

                $model = 0;



                //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);

                        $tag_name = lookup_Nikon_tag($tag, $model);



                        //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 tag is 0002 then its the ASCII value which we know is at 140 so calc offset

                        //THIS HACK ONLY WORKS WITH EARLY NIKON MODELS

                        if($tag=="0002") $offset = hexdec($value)-140;

                        if($bytesofdata<=4) {

                                $data = $value;

                        } else {

                                $value = bin2hex($value);

                                if($intel==1) $value = intel2Moto($value);

                                $data = substr($block,hexdec($value)-$offset,$bytesofdata*2);

                        }

                        $formated_data = formatNikonData($type,$tag,$intel,$model,$data);



                        if($result['VerboseOutput']==1) {

                                $result['SubIFD']['MakerNote'][$tag_name] = $formated_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;

                        }

                }



        } else {

                $place=0;//current place

                $model = 1;



                $nikon = substr($block,$place,8);$place+=8;

                $endien = substr($block,$place,4);$place+=4;



                //2 bytes of 0x002a

                $tag = bin2hex(substr($block,$place,2));$place+=2;



                //Then 4 bytes of offset to IFD0 (usually 8 which includes all 8 bytes of TIFF header)

                $offset = bin2hex(substr($block,$place,4));$place+=4;

                if($intel==1) $offset = intel2Moto($offset);

                if(hexdec($offset)>8) $place+=$offset-8;



                //Get number of tags (2 bytes)

                $num = bin2hex(substr($block,$place,2));$place+=2;

                if($intel==1) $num = intel2Moto($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);

                        $tag_name = lookup_Nikon_tag($tag, $model);



                        //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);

                                $data = substr($block,hexdec($value)+hexdec($offset)+2,$bytesofdata);

                        }

                        $formated_data = formatNikonData($type,$tag,$intel,$model,$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;

                        }

                }



        }

}





?>