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File: exif.php
<?php /************************* Coppermine Photo Gallery ************************ Copyright (c) 2003-2006 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: 1.4.8 $Source$ $Revision: 3116 $ $Author: gaugau $ $Date: 2006-06-08 00:11:54 +0200 (Do, 08 Jun 2006) $ **********************************************/ /* //================================================================================================ //================================================================================================ //================================================================================================ /* Exifer 1.5 Extracts EXIF information from digital photos. Copyright 2005 Jake Olefsky http://www.offsky.com/software/exif/index.php jake@olefsky.com 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 SUMMARY: This script will correctly parse all of the EXIF data included in images taken with digital cameras. It will read the IDF0, IDF1, SubIDF and InteroperabilityIFD fields as well as parsing some of the MakerNote fields that vary depending on camera make and model. This script parses more tags than the internal PHP exif implementation and it will correctly identify and decode what all the values mean. This version will correctly parse the MakerNote field for Nikon, Olympus, and Canon digital cameras. Others will follow. TESTED WITH: Nikon CoolPix 700 Nikon CoolPix 4500 Nikon CoolPix 950 Nikon Coolpix 5700 Canon PowerShot S200 Canon PowerShot S110 Olympus C2040Z Olympus C960 Canon Ixus Canon EOS 300D Canon Digital Rebel Canon EOS 10D Canon PowerShot G2 FujiFilm DX 10 FujiFilm MX-1200 FujiFilm FinePix2400 FujiFilm FinePix2600 FujiFilm FinePix S602 FujiFilm FinePix40i Sony D700 Sony Cybershot Kodak DC210 Kodak DC240 Kodak DC4800 Kodak DX3215 Ricoh RDC-5300 Sanyo VPC-G250 Sanyo VPC-SX550 Epson 3100z If you improve this script or test it with a camera not on my list, please email me a copy of the improvement so everyone can benefit from it. Thanks! VERSION HISTORY: 1.0 Sept 23, 2002 First Public Release 1.1 Jan 25, 2003 +Gracefully handled the error case where you pass an empty string to this library +Fixed an inconsistency in the Olympus Camera parsing module +Added support for parsing the MakerNote of Canon images. +Modified how the imagefile is opened so it works for windows machines. +Correctly parses the FocalPlaneResolutionUnit and PhotometricInterpretation fields +Negative rational numbers are properly displayed +Strange old cameras that use Motorola endineness are now properly supported +Tested with several more cameras Potential Problem: Negative Shorts and Negative Longs may not be correctly displayed, but I have not yet found an example of negative shorts or longs being used. 1.2 Mar 30, 2003 +Fixed an error that was displayed if you edited your image with WinXP's image viewer +Fixed a bug that caused some images saved from 3rd party software to not parse correctly +Changed the ExposureTime tag to display in fractional seconds rather than decimal +Updated the ShutterSpeedValue tag to have the units of 'sec' +Added support for parsing the MakeNote of FujiFilm images +Added support for parsing the MakeNote of Sanyo images +Fixed a bug with parsing some Olympus MakerNote tags +Tested with several more cameras 1.3 Jun 15, 2003 +Fixed Canon MakerNote support for some models (Canon has very difficult and inconsistent MakerNote syntax) +Negative signed shorts and negative signed longs are properly displayed +Several more tags are defined +More information in my comments about what each tag is +Parses and Displays GPS information if available +Tested with several more cameras 1.4 Sept 14, 2003 +This software is now licensed under the GNU General Public License +Exposure time is now correctly displayed when the numerator is 10 +Fixed the calculation and display of ShutterSpeedValue, ApertureValue and MaxApertureValue +Fixed a bug with the GPS code +Tested with several more cameras 1.5 Feb 18, 2005 +It now gracefully deals with a passed in file that cannot be found. +Fixed a GPS bug for the parsing of Altitude and other signed rational numbers +Defined more values for Canon cameras. +Added "bulb" detection for ShutterSpeed +Made script loading a little faster and less memory intensive. +Bug fixes +Better error reporting +Graceful failure for files with corrupt exif info. +QuickTime (including iPhoto) messes up the Makernote tag for certain photos (no workaround yet) +Now reads exif information when the jpeg markers are out of order +Gives raw data output for IPTC, COM and APP2 fields which are sometimes set by other applications +Improvements to Nikon Makernote parsing */ //================================================================================================ //================================================================================================ //================================================================================================ //================================================================================================ //================================================================================================ // Converts from Intel to Motorola endien. Just reverses the bytes (assumes hex is passed in) //================================================================================================ //================================================================================================ function intel2Moto($intel) { $len = strlen($intel); $moto=""; for($i=0; $i<=$len; $i+=2) { $moto.=substr($intel,$len-$i,2); } return $moto; } //================================================================================================ //================================================================================================ // Looks up the name of the tag //================================================================================================ //================================================================================================ function lookup_tag($tag) { switch($tag) { //used by IFD0 "Camera Tags" case "000b": $tag = "ACDComment";break; //text string up to 999 bytes long case "00fe": $tag = "ImageType";break; //integer -2147483648 to 2147483647 case "0106": $tag = "PhotometricInterpret";break; //?? Please send sample image with this tag case "010e": $tag = "ImageDescription";break; //text string up to 999 bytes long case "010f": $tag = "Make";break; //text string up to 999 bytes long case "0110": $tag = "Model";break; //text string up to 999 bytes long case "0112": $tag = "Orientation";break; //integer values 1-9 case "0115": $tag = "SamplePerPixel";break; //integer 0-65535 case "011a": $tag = "xResolution";break; //positive rational number case "011b": $tag = "yResolution";break; //positive rational number case "011c": $tag = "PlanarConfig";break; //integer values 1-2 case "0128": $tag = "ResolutionUnit";break; //integer values 1-3 case "0131": $tag = "Software";break; //text string up to 999 bytes long case "0132": $tag = "DateTime";break; //YYYY:MM:DD HH:MM:SS case "013b": $tag = "Artist";break; //text string up to 999 bytes long case "013c": $tag = "HostComputer";break; //text string case "013e": $tag = "WhitePoint";break; //two positive rational numbers case "013f": $tag = "PrimaryChromaticities";break; //six positive rational numbers case "0211": $tag = "YCbCrCoefficients";break; //three positive rational numbers case "0213": $tag = "YCbCrPositioning";break; //integer values 1-2 case "0214": $tag = "ReferenceBlackWhite";break; //six positive rational numbers case "8298": $tag = "Copyright";break; //text string up to 999 bytes long case "8649": $tag = "PhotoshopSettings";break; //?? case "8825": $tag = "GPSInfoOffset";break; case "9286": $tag = "UserCommentOld";break; //?? case "8769": $tag = "ExifOffset";break; //positive integer //used by Exif SubIFD "Image Tags" case "829a": $tag = "ExposureTime";break; //seconds or fraction of seconds 1/x case "829d": $tag = "FNumber";break; //positive rational number case "8822": $tag = "ExposureProgram";break; //integer value 1-9 case "8824": $tag = "SpectralSensitivity";break; //?? case "8827": $tag = "ISOSpeedRatings";break; //integer 0-65535 case "9000": $tag = "ExifVersion";break; //?? case "9003": $tag = "DateTimeOriginal";break; //YYYY:MM:DD HH:MM:SS case "9004": $tag = "DateTimedigitized";break; //YYYY:MM:DD HH:MM:SS case "9101": $tag = "ComponentsConfiguration";break; //?? case "9102": $tag = "CompressedBitsPerPixel";break; //positive rational number case "9201": $tag = "ShutterSpeedValue";break; //seconds or fraction of seconds 1/x case "9202": $tag = "ApertureValue";break; //positive rational number case "9203": $tag = "BrightnessValue";break; //positive rational number case "9204": $tag = "ExposureBiasValue";break; //positive rational number (EV) case "9205": $tag = "MaxApertureValue";break; //positive rational number case "9206": $tag = "SubjectDistance";break; //positive rational number (meters) case "9207": $tag = "MeteringMode";break; //integer 1-6 and 255 case "9208": $tag = "LightSource";break; //integer 1-255 case "9209": $tag = "Flash";break; //integer 1-255 case "920a": $tag = "FocalLength";break; //positive rational number (mm) case "9213": $tag = "ImageHistory";break; //text string up to 999 bytes long case "927c": $tag = "MakerNote";break; //a bunch of data case "9286": $tag = "UserComment";break; //text string case "9290": $tag = "SubsecTime";break; //text string up to 999 bytes long case "9291": $tag = "SubsecTimeOriginal";break; //text string up to 999 bytes long case "9292": $tag = "SubsecTimeDigitized";break; //text string up to 999 bytes long case "a000": $tag = "FlashPixVersion";break; //?? case "a001": $tag = "ColorSpace";break; //values 1 or 65535 case "a002": $tag = "ExifImageWidth";break; //ingeter 1-65535 case "a003": $tag = "ExifImageHeight";break; //ingeter 1-65535 case "a004": $tag = "RelatedSoundFile";break; //text string 12 bytes long case "a005": $tag = "ExifInteroperabilityOffset";break; //positive integer case "a20c": $tag = "SpacialFreqResponse";break; //?? case "a20b": $tag = "FlashEnergy";break; //positive rational number case "a20e": $tag = "FocalPlaneXResolution";break; //positive rational number case "a20f": $tag = "FocalPlaneYResolution";break; //positive rational number case "a210": $tag = "FocalPlaneResolutionUnit";break; //values 1-3 case "a214": $tag = "SubjectLocation";break; //two integers 0-65535 case "a215": $tag = "ExposureIndex";break; //positive rational number case "a217": $tag = "SensingMethod";break; //values 1-8 case "a300": $tag = "FileSource";break; //integer case "a301": $tag = "SceneType";break; //integer case "a302": $tag = "CFAPattern";break; //undefined data type case "a401": $tag = "CustomerRender";break; //values 0 or 1 case "a402": $tag = "ExposureMode";break; //values 0-2 case "a403": $tag = "WhiteBalance";break; //values 0 or 1 case "a404": $tag = "DigitalZoomRatio";break; //positive rational number case "a406": $tag = "SceneCaptureMode";break; //values 0-3 case "a407": $tag = "GainControl";break; //values 0-4 case "a408": $tag = "Contrast";break; //values 0-2 case "a409": $tag = "Saturation";break; //values 0-2 case "a40a": $tag = "Sharpness";break; //values 0-2 //used by Interoperability IFD case "0001": $tag = "InteroperabilityIndex";break; //text string 3 bytes long case "0002": $tag = "InteroperabilityVersion";break; //datatype undefined case "1000": $tag = "RelatedImageFileFormat";break; //text string up to 999 bytes long case "1001": $tag = "RelatedImageWidth";break; //integer in range 0-65535 case "1002": $tag = "RelatedImageLength";break; //integer in range 0-65535 //used by IFD1 "Thumbnail" case "0100": $tag = "ImageWidth";break; //integer in range 0-65535 case "0101": $tag = "ImageLength";break; //integer in range 0-65535 case "0102": $tag = "BitsPerSample";break; //integers in range 0-65535 case "0103": $tag = "Compression";break; //values 1 or 6 case "0106": $tag = "PhotometricInterpretation";break; //values 0-4 case "010e": $tag = "ThumbnailDescription";break; //text string up to 999 bytes long case "010f": $tag = "ThumbnailMake";break; //text string up to 999 bytes long case "0110": $tag = "ThumbnailModel";break; //text string up to 999 bytes long case "0111": $tag = "StripOffsets";break; //?? case "0112": $tag = "ThumbnailOrientation";break; //integer 1-9 case "0115": $tag = "SamplesPerPixel";break; //?? case "0116": $tag = "RowsPerStrip";break; //?? case "0117": $tag = "StripByteCounts";break; //?? case "011a": $tag = "ThumbnailXResolution";break; //positive rational number case "011b": $tag = "ThumbnailYResolution";break; //positive rational number case "011c": $tag = "PlanarConfiguration";break; //values 1 or 2 case "0128": $tag = "ThumbnailResolutionUnit";break; //values 1-3 case "0201": $tag = "JpegIFOffset";break; case "0202": $tag = "JpegIFByteCount";break; case "0212": $tag = "YCbCrSubSampling";break; //misc case "00ff": $tag = "SubfileType";break; case "012d": $tag = "TransferFunction";break; case "013d": $tag = "Predictor";break; case "0142": $tag = "TileWidth";break; case "0143": $tag = "TileLength";break; case "0144": $tag = "TileOffsets";break; case "0145": $tag = "TileByteCounts";break; case "014a": $tag = "SubIFDs";break; case "015b": $tag = "JPEGTables";break; case "828d": $tag = "CFARepeatPatternDim";break; case "828e": $tag = "CFAPattern";break; case "828f": $tag = "BatteryLevel";break; case "83bb": $tag = "IPTC/NAA";break; case "8773": $tag = "InterColorProfile";break; case "8828": $tag = "OECF";break; case "8829": $tag = "Interlace";break; case "882a": $tag = "TimeZoneOffset";break; case "882b": $tag = "SelfTimerMode";break; case "920b": $tag = "FlashEnergy";break; case "920c": $tag = "SpatialFrequencyResponse";break; case "920d": $tag = "Noise";break; case "9211": $tag = "ImageNumber";break; case "9212": $tag = "SecurityClassification";break; case "9214": $tag = "SubjectLocation";break; case "9215": $tag = "ExposureIndex";break; case "9216": $tag = "TIFF/EPStandardID";break; case "a20b": $tag = "FlashEnergy";break; default: $tag = "unknown:".$tag;break; } return $tag; } //================================================================================================ //================================================================================================ // Looks up the datatype //================================================================================================ //================================================================================================ function lookup_type(&$type,&$size) { switch($type) { case "0001": $type = "UBYTE";$size=1;break; case "0002": $type = "ASCII";$size=1;break; case "0003": $type = "USHORT";$size=2;break; case "0004": $type = "ULONG";$size=4;break; case "0005": $type = "URATIONAL";$size=8;break; case "0006": $type = "SBYTE";$size=1;break; case "0007": $type = "UNDEFINED";$size=1;break; case "0008": $type = "SSHORT";$size=2;break; case "0009": $type = "SLONG";$size=4;break; case "000a": $type = "SRATIONAL";$size=8;break; case "000b": $type = "FLOAT";$size=4;break; case "000c": $type = "DOUBLE";$size=8;break; default: $type = "error:".$type;$size=0;break; } return $type; } //================================================================================================ //================================================================================================ // Formats Data for the data type //================================================================================================ //================================================================================================ function formatData($type,$tag,$intel,$data) { if($type=="ASCII") { //do nothing } else if($type=="URATIONAL" || $type=="SRATIONAL") { $data = bin2hex($data); if($intel==1) $data = intel2Moto($data); if($intel==1) $top = hexdec(substr($data,8,8)); //intel stores them bottom-top else $top = hexdec(substr($data,0,8)); //motorola stores them top-bottom if($intel==1) $bottom = hexdec(substr($data,0,8)); //intel stores them bottom-top else $bottom = hexdec(substr($data,8,8)); //motorola stores them top-bottom if($type=="SRATIONAL" && $top>2147483647) $top = $top - 4294967296; //this makes the number signed instead of unsigned if($bottom!=0) $data=$top/$bottom; else if($top==0) $data = 0; else $data=$top."/".$bottom; if(($tag=="011a" || $tag=="011b") && $bottom==1) { //XResolution YResolution $data=$top." dots per ResolutionUnit"; } else if($tag=="829a") { //Exposure Time if($top/10 == 1) $data="1/".round($bottom/10, 0)." sec"; else $data=$top."/".$bottom." sec"; } else if($tag=="829d") { //FNumber $data="f ".$data; } else if($tag=="9204") { //ExposureBiasValue $data=$data." EV"; } else if($tag=="9205" || $tag=="9202") { //ApertureValue and MaxApertureValue //ApertureValue is given in the APEX Mode. Many thanks to Matthieu Froment for this code //The formula is : Aperture = 2*log2(FNumber) <=> FNumber = e((Aperture.ln(2))/2) $data = exp(($data*log(2))/2); $data = round($data, 1);//Focal is given with a precision of 1 digit. $data="f ".$data; } else if($tag=="920a") { //FocalLength $data=$data." mm"; } else if($tag=="9201") { //ShutterSpeedValue // The ShutterSpeedValue is given in the APEX mode. Many thanks to Matthieu Froment for this code // The formula is : Shutter = - log2(exposureTime) (Appendix C of EXIF spec.) // Where shutter is in APEX, log2(exposure) = ln(exposure)/ln(2) // So final formula is : exposure = exp(-ln(2).shutter) // The formula can be developed : exposure = 1/(exp(ln(2).shutter)) $data = exp($data * log(2)); if ($data > 1) $data = floor($data); //Drop the decimal. if ($data > 0) { $data = 1/$data; //Final calculation. We now have a floating number. Transform it in a pretty number $n=0;$d=0; ConvertToFraction($data, $n, $d); if ($n>=1 && $d==1) $data = $n." sec"; //To avoid exposure times style 3/1 sec. else $data = $n."/".$d." sec"; } else { $data = "Bulb"; } } } else if($type=="USHORT" || $type=="SSHORT" || $type=="ULONG" || $type=="SLONG" || $type=="FLOAT" || $type=="DOUBLE") { $data = bin2hex($data); if($intel==1) $data = intel2Moto($data); if($intel==0 && ($type=="USHORT" || $type=="SSHORT")) $data = substr($data,0,4); $data=hexdec($data); if($type=="SSHORT" && $data>32767) $data = $data - 65536; //this makes the number signed instead of unsigned if($type=="SLONG" && $data>2147483647) $data = $data - 4294967296; //this makes the number signed instead of unsigned if($tag=="0112") { //Orientation if($data==1) $data = "Normal (O deg)"; if($data==2) $data = "Mirrored"; if($data==3) $data = "Upsidedown"; if($data==4) $data = "Upsidedown Mirrored"; if($data==5) $data = "90 deg CW Mirrored"; if($data==6) $data = "90 deg CCW"; if($data==7) $data = "90 deg CCW Mirrored"; if($data==8) $data = "90 deg CW"; } else if($tag=="0128" || $tag=="a210" || $tag=="0128") { //ResolutionUnit and FocalPlaneResolutionUnit and ThumbnailResolutionUnit if($data==1) $data = "No Unit"; if($data==2) $data = "Inch"; if($data==3) $data = "Centimeter"; } else if($tag=="0213") { //YCbCrPositioning if($data==1) $data = "Center of Pixel Array"; if($data==2) $data = "Datum Point"; } else if($tag=="8822") { //ExposureProgram if($data==1) $data = "Manual"; else if($data==2) $data = "Program"; else if($data==3) $data = "Aperature Priority"; else if($data==4) $data = "Shutter Priority"; else if($data==5) $data = "Program Creative"; else if($data==6) $data = "Program Action"; else if($data==7) $data = "Portrat"; else if($data==8) $data = "Landscape"; else $data = "Unknown: ".$data; } else if($tag=="9207") { //MeteringMode if($data==0) $data = "Unknown"; else if($data==1) $data = "Average"; else if($data==2) $data = "Center Weighted Average"; else if($data==3) $data = "Spot"; else if($data==4) $data = "Multi-Spot"; else if($data==5) $data = "Multi-Segment"; else if($data==6) $data = "Partial"; else if($data==255) $data = "Other"; else $data = "Unknown: ".$data; } else if($tag=="9208") { //LightSource if($data==0) $data = "Unknown or Auto"; else if($data==1) $data = "Daylight"; else if($data==2) $data = "Flourescent"; else if($data==3) $data = "Tungsten"; else if($data==10) $data = "Flash"; else if($data==17) $data = "Standard Light A"; else if($data==18) $data = "Standard Light B"; else if($data==19) $data = "Standard Light C"; else if($data==20) $data = "D55"; else if($data==21) $data = "D65"; else if($data==22) $data = "D75"; else if($data==255) $data = "Other"; else $data = "Unknown: ".$data; } else if($tag=="9209") { //Flash if($data==0) $data = "No Flash"; else if($data==1) $data = "Flash"; else if($data==5) $data = "Flash, strobe return light not detected"; else if($data==7) $data = "Flash, strob return light detected"; else if($data==9) $data = "Compulsory Flash"; else if($data==13) $data = "Compulsory Flash, Return light not detected"; else if($data==15) $data = "Compulsory Flash, Return light detected"; else if($data==16) $data = "No Flash"; else if($data==24) $data = "No Flash"; else if($data==25) $data = "Flash, Auto-Mode"; else if($data==29) $data = "Flash, Auto-Mode, Return light not detected"; else if($data==31) $data = "Flash, Auto-Mode, Return light detected"; else if($data==32) $data = "No Flash"; else if($data==65) $data = "Red Eye"; else if($data==69) $data = "Red Eye, Return light not detected"; else if($data==71) $data = "Red Eye, Return light detected"; else if($data==73) $data = "Red Eye, Compulsory Flash"; else if($data==77) $data = "Red Eye, Compulsory Flash, Return light not detected"; else if($data==79) $data = "Red Eye, Compulsory Flash, Return light detected"; else if($data==89) $data = "Red Eye, Auto-Mode"; else if($data==93) $data = "Red Eye, Auto-Mode, Return light not detected"; else if($data==95) $data = "Red Eye, Auto-Mode, Return light detected"; else $data = "Unknown: ".$data; } else if($tag=="a001") { //ColorSpace if($data==1) $data = "sRGB"; else $data = "Uncalibrated"; } else if($tag=="a002" || $tag=="a003") { //ExifImageWidth/Height $data = $data. " pixels"; } else if($tag=="0103") { //Compression if($data==1) $data = "No Compression"; else if($data==6) $data = "Jpeg Compression"; else $data = "Unknown: ".$data; } else if($tag=="a217") { //SensingMethod if($data==1) $data = "Not defined"; if($data==2) $data = "One Chip Color Area Sensor"; if($data==3) $data = "Two Chip Color Area Sensor"; if($data==4) $data = "Three Chip Color Area Sensor"; if($data==5) $data = "Color Sequential Area Sensor"; if($data==7) $data = "Trilinear Sensor"; if($data==8) $data = "Color Sequential Linear Sensor"; else $data = "Unknown: ".$data; } else if($tag=="0106") { //PhotometricInterpretation if($data==1) $data = "Monochrome"; else if($data==2) $data = "RGB"; else if($data==6) $data = "YCbCr"; else $data = "Unknown: ".$data; } } else if($type=="UNDEFINED") { if($tag=="9000" || $tag=="a000" || $tag=="0002") { //ExifVersion,FlashPixVersion,InteroperabilityVersion $data="version ".$data/100; } if($tag=="a300") { //FileSource $data = bin2hex($data); $data = str_replace("00","",$data); $data = str_replace("03","Digital Still Camera",$data); } if($tag=="a301") { //SceneType $data = bin2hex($data); $data = str_replace("00","",$data); $data = str_replace("01","Directly Photographed",$data); } if($tag=="9101") { //ComponentsConfiguration $data = bin2hex($data); $data = str_replace("01","Y",$data); $data = str_replace("02","Cb",$data); $data = str_replace("03","Cr",$data); $data = str_replace("04","R",$data); $data = str_replace("05","G",$data); $data = str_replace("06","B",$data); $data = str_replace("00","",$data); } } else { $data = bin2hex($data); if($intel==1) $data = intel2Moto($data); } return $data; } //================================================================================================ //================================================================================================ // Reads one standard IFD entry //================================================================================================ //================================================================================================ function read_entry(&$result,$in,$seek,$intel,$ifd_name,$globalOffset) { if(feof($in)) { //test to make sure we can still read. $result['Errors'] = $result['Errors']+1; return; } //2 byte tag $tag = bin2hex(fread( $in, 2 )); if($intel==1) $tag = intel2Moto($tag); $tag_name = lookup_tag($tag); //2 byte datatype $type = bin2hex(fread( $in, 2 )); if($intel==1) $type = intel2Moto($type); lookup_type($type,$size); //4 byte number of elements $count = bin2hex(fread( $in, 4 )); if($intel==1) $count = intel2Moto($count); $bytesofdata = $size*hexdec($count); //4 byte value or pointer to value if larger than 4 bytes $value = fread( $in, 4 ); if($bytesofdata<=4) { //if datatype is 4 bytes or less, its the value $data = $value; } else if($bytesofdata<100000) { //otherwise its a pointer to the value, so lets go get it $value = bin2hex($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']+1; } } else { //bytesofdata was too big, so the exif had an error $result['Errors'] = $result['Errors']+1; return; } if($tag_name=="MakerNote") { //if its a maker tag, we need to parse this specially $make = $result['IFD0']['Make']; if($result['VerboseOutput']==1) { $result[$ifd_name]['MakerNote']['RawData'] = $data; } if(eregi("NIKON",$make)) { require_once('makers/nikon.php'); parseNikon($data,$result); $result[$ifd_name]['KnownMaker'] = 1; } else if(eregi("OLYMPUS",$make)) { require_once('makers/olympus.php'); parseOlympus($data,$result,$seek,$globalOffset); $result[$ifd_name]['KnownMaker'] = 1; } else if(eregi("Canon",$make)) { require_once('makers/canon.php'); parseCanon($data,$result,$seek,$globalOffset); $result[$ifd_name]['KnownMaker'] = 1; } else if(eregi("FUJIFILM",$make)) { require_once('makers/fujifilm.php'); parseFujifilm($data,$result); $result[$ifd_name]['KnownMaker'] = 1; } else if(eregi("SANYO",$make)) { require_once('makers/sanyo.php'); parseSanyo($data,$result,$seek,$globalOffset); $result[$ifd_name]['KnownMaker'] = 1; } else { $result[$ifd_name]['KnownMaker'] = 0; } } else if($tag_name=="GPSInfoOffset") { require_once('makers/gps.php'); $formated_data = formatData($type,$tag,$intel,$data); $result[$ifd_name]['GPSInfo'] = $formated_data; parseGPS($data,$result,$formated_data,$seek,$globalOffset); } else { //Format the data depending on the type and tag $formated_data = formatData($type,$tag,$intel,$data); $result[$ifd_name][$tag_name] = $formated_data; if($result['VerboseOutput']==1) { 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); } $result[$ifd_name][$tag_name."_Verbose"]['RawData'] = $data; $result[$ifd_name][$tag_name."_Verbose"]['Type'] = $type; $result[$ifd_name][$tag_name."_Verbose"]['Bytes'] = $bytesofdata; } } } //================================================================================================ //================================================================================================ // Pass in a file and this reads the EXIF data // // Usefull resources // http://www.ba.wakwak.com/~tsuruzoh/Computer/Digicams/exif-e.html // http://www.w3.org/Graphics/JPEG/jfif.txt // http://exif.org/ // http://www.ozhiker.com/electronics/pjmt/library/list_contents.php4 // http://www.ozhiker.com/electronics/pjmt/jpeg_info/makernotes.html // http://pel.sourceforge.net/ // http://us2.php.net/manual/en/function.exif-read-data.php //================================================================================================ //================================================================================================ function read_exif_data_raw($path,$verbose) { if($path=='' || $path=='none') return; $in = @fopen($path, "rb"); //the b is for windows machines to open in binary mode $seek = @fopen($path, "rb"); //There may be an elegant way to do this with one file handle. $globalOffset = 0; if(!isset($verbose)) $verbose=0; $result['VerboseOutput'] = $verbose; $result['Errors'] = 0; if(!$in || !$seek) { //if the path was invalid, this error will catch it $result['Errors'] = 1; $result['Error'][$result['Errors']] = "The file could not be found."; return $result; } //First 2 bytes of JPEG are 0xFFD8 $data = bin2hex(fread( $in, 2 )); if($data=="ffd8") { $result['ValidJpeg'] = 1; } else { $result['ValidJpeg'] = 0; fclose($in); fclose($seek); return $result; } $result['ValidIPTCData'] = 0; $result['ValidJFIFData'] = 0; $result['ValidEXIFData'] = 0; $result['ValidAPP2Data'] = 0; $result['ValidCOMData'] = 0; //Next 2 bytes are MARKER tag (0xFFE#) $data = bin2hex(fread( $in, 2 )); $size = bin2hex(fread( $in, 2 )); //LOOP THROUGH MARKERS TILL YOU GET TO FFE1 (exif marker) while(!feof($in) && $data!="ffe1" && $data!="ffc0" && $data!="ffd9") { if($data=="ffe0") { //JFIF Marker $result['ValidJFIFData'] = 1; $result['JFIF']['Size'] = hexdec($size); if(hexdec($size)-2 > 0) { $data = fread( $in, hexdec($size)-2); $result['JFIF']['Data'] = $data; } $result['JFIF']['Identifier'] = substr($data,0,5);; $result['JFIF']['ExtensionCode'] = bin2hex(substr($data,6,1)); $globalOffset+=hexdec($size)+2; } else if($data=="ffed") { //IPTC Marker $result['ValidIPTCData'] = 1; $result['IPTC']['Size'] = hexdec($size); if(hexdec($size)-2 > 0) { $data = fread( $in, hexdec($size)-2); $result['IPTC']['Data'] = $data ; } $globalOffset+=hexdec($size)+2; } else if($data=="ffe2") { //EXIF extension Marker $result['ValidAPP2Data'] = 1; $result['APP2']['Size'] = hexdec($size); if(hexdec($size)-2 > 0) { $data = fread( $in, hexdec($size)-2); $result['APP2']['Data'] = $data ; } $globalOffset+=hexdec($size)+2; } else if($data=="fffe") { //COM extension Marker $result['ValidCOMData'] = 1; $result['COM']['Size'] = hexdec($size); if(hexdec($size)-2 > 0) { $data = fread( $in, hexdec($size)-2); $result['COM']['Data'] = $data ; } $globalOffset+=hexdec($size)+2; } else if($data=="ffe1") { $result['ValidEXIFData'] = 1; } $data = bin2hex(fread( $in, 2 )); $size = bin2hex(fread( $in, 2 )); } //END MARKER LOOP if($data=="ffe1") { $result['ValidEXIFData'] = 1; } else { fclose($in); fclose($seek); return $result; } //Size of APP1 $result['APP1Size'] = hexdec($size); //Start of APP1 block starts with "Exif" header (6 bytes) $header = fread( $in, 6 ); //Then theres a TIFF header with 2 bytes of endieness (II or MM) $header = fread( $in, 2 ); if($header==="II") { $intel=1; $result['Endien'] = "Intel"; } else if($header==="MM") { $intel=0; $result['Endien'] = "Motorola"; } else { $intel=1; //not sure what the default should be, but this seems reasonable $result['Endien'] = "Unknown"; } //2 bytes of 0x002a $tag = bin2hex(fread( $in, 2 )); //Then 4 bytes of offset to IFD0 (usually 8 which includes all 8 bytes of TIFF header) $offset = bin2hex(fread( $in, 4 )); if($intel==1) $offset = intel2Moto($offset); // Check for extremely large values here if(hexdec($offset) > 100000) { $result['ValidEXIFData'] = 0; fclose($in); fclose($seek); return $result; } if(hexdec($offset)>8) $unknown = fread( $in, hexdec($offset)-8); //fixed this bug in 1.3 //add 12 to the offset to account for TIFF header $globalOffset+=12; //===========================================================Start of IFD0 $num = bin2hex(fread( $in, 2 )); if($intel==1) $num = intel2Moto($num); $num = hexdec($num); $result['IFD0NumTags'] = $num; if($num<1000) { //1000 entries is too much and is probably an error. for($i=0;$i<$num;$i++) { read_entry($result,$in,$seek,$intel,"IFD0",$globalOffset); } } else { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Illegal size for IFD0"; } //store offset to IFD1 $offset = bin2hex(fread( $in, 4 )); if($intel==1) $offset = intel2Moto($offset); $result['IFD1Offset'] = hexdec($offset); //Check for SubIFD if(!isset($result['IFD0']['ExifOffset']) || $result['IFD0']['ExifOffset']==0) { fclose($in); fclose($seek); return $result; } //seek to SubIFD (Value of ExifOffset tag) above. $ExitOffset = $result['IFD0']['ExifOffset']; $v = fseek($in,$globalOffset+$ExitOffset); if($v==-1) { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Couldnt Find SubIFD"; } //===========================================================Start of SubIFD $num = bin2hex(fread( $in, 2 )); if($intel==1) $num = intel2Moto($num); $num = hexdec($num); $result['SubIFDNumTags'] = $num; if($num<1000) { //1000 entries is too much and is probably an error. for($i=0;$i<$num;$i++) { read_entry($result,$in,$seek,$intel,"SubIFD",$globalOffset); } } else { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Illegal size for SubIFD"; } //Check for IFD1 if(!isset($result['IFD1Offset']) || $result['IFD1Offset']==0) { fclose($in); fclose($seek); return $result; } //seek to IFD1 $v = fseek($in,$globalOffset+$result['IFD1Offset']); if($v==-1) { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Couldnt Find IFD1"; } //===========================================================Start of IFD1 $num = bin2hex(fread( $in, 2 )); if($intel==1) $num = intel2Moto($num); $num = hexdec($num); $result['IFD1NumTags'] = $num; if($num<1000) { //1000 entries is too much and is probably an error. for($i=0;$i<$num;$i++) { read_entry($result,$in,$seek,$intel,"IFD1",$globalOffset); } } else { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Illegal size for IFD1"; } //if verbose output is on, stick in the thumbnail raw data if($result['VerboseOutput']==1 && $result['IFD1']['JpegIFOffset']>0 && $result['IFD1']['JpegIFByteCount']>0) { $v = fseek($seek,$globalOffset+$result['IFD1']['JpegIFOffset']); if($v==0) { $data = fread($seek, $result['IFD1']['JpegIFByteCount']); } else if($v==-1) { $result['Errors'] = $result['Errors']+1; } $result['IFD1']["ThumbnailData"] = $data; } //Check for Interoperability IFD if(!isset($result['SubIFD']['ExifInteroperabilityOffset']) || $result['SubIFD']['ExifInteroperabilityOffset']==0) { fclose($in); fclose($seek); return $result; } //seek to InteroperabilityIFD $v = fseek($in,$globalOffset+$result['SubIFD']['ExifInteroperabilityOffset']); if($v==-1) { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Couldnt Find InteroperabilityIFD"; } //===========================================================Start of InteroperabilityIFD $num = bin2hex(fread( $in, 2 )); if($intel==1) $num = intel2Moto($num); $num = hexdec($num); $result['InteroperabilityIFDNumTags'] = $num; if($num<1000) { //1000 entries is too much and is probably an error. for($i=0;$i<$num;$i++) { read_entry($result,$in,$seek,$intel,"InteroperabilityIFD",$globalOffset); } } else { $result['Errors'] = $result['Errors']+1; $result['Error'][$result['Errors']] = "Illegal size for InteroperabilityIFD"; } fclose($in); fclose($seek); return $result; } //================================================================================================ //================================================================================================ // Converts a floating point number into a fraction. Many thanks to Matthieu Froment for this code //================================================================================================ //================================================================================================ function ConvertToFraction($v, &$n, &$d) { $MaxTerms = 15; //Limit to prevent infinite loop $MinDivisor = 0.000001; //Limit to prevent divide by zero $MaxError = 0.00000001; //How close is enough $f = $v; //Initialize fraction being converted $n_un = 1; //Initialize fractions with 1/0, 0/1 $d_un = 0; $n_deux = 0; $d_deux = 1; for ($i = 0;$i<$MaxTerms;$i++) { $a = floor($f); //Get next term $f = $f - $a; //Get new divisor $n = $n_un * $a + $n_deux; //Calculate new fraction $d = $d_un * $a + $d_deux; $n_deux = $n_un; //Save last two fractions $d_deux = $d_un; $n_un = $n; $d_un = $d; if ($f < $MinDivisor) //Quit if dividing by zero break; if (abs($v - $n / $d) < $MaxError) break; $f = 1 / $f; //Take reciprocal } } ?>
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