--- /dev/null
+<?php
+/**
+ * PHP Class to read EXIF information
+ * that most of the digital camera produce
+ *
+ * This class is based on jhead (in C) by Matthias Wandel
+ *
+ * Vinay Yadav < vinay@vinayras.com >
+ Concept by Tarique Sani < tarique@sanisoft.com >
+
+ * http://www.vinayras.com/project/phpexifrw.php
+ * http://www.sanisoft.com/phpexifrw/
+ *
+ * For more information on EXIF
+ * http://www.exif.org/
+ *
+ * Features:
+ * - Read Exif Information
+ * - Extract and display emdedded thumbnails
+ *
+ * Tested With
+
+ - Sony
+ - Cybershot (Sony)
+ - DSC-D700
+ - PowerShotA5
+ - SANYO Electric Co.,Ltd
+ - SR6
+ - SX113
+ - OLYMPUS OPTICAL CO.,LTD
+ - C960Z,D460Z
+ - Canon
+ PowerShot A40 (Canon)
+ Canon DIGITAL IXUS
+ - RICOH
+ - Caplio RR30
+ - RDC-5300
+ - NIKON
+ - D100 (NIKON CORPORATION)
+ - E5700 (NIKON)
+ - E950
+ - CASIO QV-8000SX
+ - KODAK
+ - DC290 Zoom Digital Camera (V01.00) [Eastman Kodak Company]
+ - DC210 Zoom (V05.00) [Eastman Kodak Company]
+ - KODAK DC240 ZOOM DIGITAL CAMERA
+ - FujiFilm
+ DX10
+ FinePix40i
+ MX-1700ZOOM
+ *
+ *
+ */
+
+/** * Start Of Frame N */
+define("M_SOF0",0xC0);
+/** * N indicates which compression process */
+define("M_SOF1",0xC1);
+/** * Only SOF0-SOF2 are now in common use */
+define("M_SOF2",0xC2);
+/** * */
+define("M_SOF3",0xC3);
+/** * NB: codes C4 and CC are NOT SOF markers */
+define("M_SOF5",0xC5);
+/** * */
+define("M_SOF6",0xC6);
+/** * */
+define("M_SOF7",0xC7);
+/** * */
+define("M_SOF9",0xC9);
+/** * */
+define("M_SOF10",0xCA);
+/** * */
+define("M_SOF11",0xCB);
+/** * */
+define("M_SOF13",0xCD);
+/** * */
+define("M_SOF14",0xCE);
+/** * */
+define("M_SOF15",0xCF);
+/** * Start Of Image (beginning of datastream) */
+define("M_SOI",0xD8);
+/** * End Of Image (end of datastream) */
+define("M_EOI",0xD9);
+/** * Start Of Scan (begins compressed data) */
+define("M_SOS",0xDA);
+/** * Jfif marker */
+define("M_JFIF",0xE0);
+/** * Exif marker */
+define("M_EXIF",0xE1);
+/** * Image Title -- */
+define("M_COM",0xFE);
+
+define("NUM_FORMATS","12");
+
+/** * Tag Data Format */
+define("FMT_BYTE","1");
+/** * ASCII */
+define("FMT_STRING","2");
+/** * Short */
+define("FMT_USHORT","3");
+/** * Long */
+define("FMT_ULONG","4");
+/** * Rational */
+define("FMT_URATIONAL","5");
+/** * Byte */
+define("FMT_SBYTE","6");
+/** * Undefined */
+define("FMT_UNDEFINED","7");
+/** * Short */
+define("FMT_SSHORT","8");
+/** * Long */
+define("FMT_SLONG","9");
+/** * Rational */
+define("FMT_SRATIONAL","10");
+/** * Single */
+define("FMT_SINGLE","11");
+/** * Double */
+define("FMT_DOUBLE","12");
+
+/** * Exif IFD */
+define("TAG_EXIF_OFFSET","0x8769");
+/** * Interoperability tag */
+define("TAG_INTEROP_OFFSET","0xa005");
+/** * Image input equipment manufacturer */
+define("TAG_MAKE","0x010F");
+/** * Image input equipment model */
+define("TAG_MODEL","0x0110");
+/** * Orientation of image */
+define("TAG_ORIENTATION","0x0112");
+/** * Exposure Time */
+define("TAG_EXPOSURETIME","0x829A");
+/** * F Number */
+define("TAG_FNUMBER","0x829D");
+/** * Shutter Speed */
+define("TAG_SHUTTERSPEED","0x9201");
+/** * Aperture */
+define("TAG_APERTURE","0x9202");
+/** * Aperture */
+define("TAG_MAXAPERTURE","0x9205");
+/** * Lens Focal Length */
+define("TAG_FOCALLENGTH","0x920A");
+/** * The date and time when the original image data was generated. */
+define("TAG_DATETIME_ORIGINAL","0x9003");
+/** * User Comments */
+define("TAG_USERCOMMENT","0x9286");
+/** * subject Location */
+define("TAG_SUBJECT_DISTANCE","0x9206");
+/** * Flash */
+define("TAG_FLASH","0x9209");
+/** * Focal Plane X Resolution */
+define("TAG_FOCALPLANEXRES","0xa20E");
+/** * Focal Plane Resolution Units */
+define("TAG_FOCALPLANEUNITS","0xa210");
+/** * Image Width */
+define("TAG_EXIF_IMAGEWIDTH","0xA002");
+/** * Image Height */
+define("TAG_EXIF_IMAGELENGTH","0xA003");
+/** * Exposure Bias */
+define("TAG_EXPOSURE_BIAS","0x9204");
+/** * Light Source */
+define("TAG_WHITEBALANCE","0x9208");
+/** * Metering Mode */
+define("TAG_METERING_MODE","0x9207");
+/** * Exposure Program */
+define("TAG_EXPOSURE_PROGRAM","0x8822");
+/** * ISO Equivalent Speed Rating */
+define("TAG_ISO_EQUIVALENT","0x8827");
+/** * Compressed Bits Per Pixel */
+define("TAG_COMPRESSION_LEVEL","0x9102");
+/** * Thumbnail Start Offset */
+define("TAG_THUMBNAIL_OFFSET","0x0201");
+/** * Thumbnail Length */
+define("TAG_THUMBNAIL_LENGTH","0x0202");
+/** * Image Marker */
+define("PSEUDO_IMAGE_MARKER",0x123);
+/** * Max Image Title Length */
+define("MAX_COMMENT",2000);
+
+define("TAG_ARTIST","0x013B");
+define("TAG_COPYRIGHT","0x8298");
+
+//--------------------------------
+
+define("TAG_IMAGE_WD","0x0100"); // image width
+define("TAG_IMAGE_HT","0x0101"); // image height
+define("TAG_IMAGE_BPS","0x0102"); // Bits Per sample
+
+define("TAG_IMAGE_PHOTO_INT","0x0106"); // photometricinterpretation
+define("TAG_IMAGE_SOFFSET","0x0111"); // stripoffsets
+
+define("TAG_IMAGE_SPP","0x0115"); // Samples per pixel - 277
+define("TAG_IMAGE_RPS","0x0116"); // RowsPerStrip - 278
+define("TAG_IMAGE_SBC","0x0117"); // StripByteCounts - 279
+
+define("TAG_IMAGE_P_CONFIG","0x011C"); // Planar Configuration - 284
+
+define("TAG_IMAGE_DESC","0x010E"); // image title
+define("TAG_X_RESOLUTION","0x011A"); // Image resolution in width direction
+define("TAG_Y_RESOLUTION","0x011B"); // Image resolution in height direction
+define("TAG_RESOLUTION_UNIT","0x0128"); // Unit of X and Y resolution
+define("TAG_SOFTWARE","0x0131"); // Software used
+define("TAG_FILE_MODDATE","0x0132"); // DateTime File change date and time
+define("TAG_YCBCR_POSITIONING","0x0213"); // Y and C positioning
+define("TAG_EXIF_VERSION","0x9000"); // Exif version
+define("TAG_DATE_TIME_DIGITIZED","0x9004"); // Date and time of digital data
+define("TAG_COMPONENT_CONFIG","0x9101"); // Component configuration
+define("TAG_MAKER_NOTE","0x927C");
+define("TAG_SUB_SEC_TIME","0x9290");
+define("TAG_SUB_SEC_TIME_ORIG","0x9291");
+define("TAG_SUB_SEC_TIME_DIGITIZED","0x9292");
+define("TAG_FLASHPIX_VER","0xA000"); //FlashPixVersion
+define("TAG_COLOR_SPACE","0xA001"); //ColorSpace
+define("TAG_RELATED_SOUND_FILE","0xA004"); //Related audio file
+
+define("TAG_GPS_LATITUDE_REF","0x0001"); //
+define("TAG_GPS_LATITUDE","0x0002"); //
+
+define("TAG_SENSING_METHOD","0xA217"); // SensingMethod
+
+define("TAG_SOUCE_TYPE","0xA300"); // FileSource
+define("TAG_SCENE_TYPE","0xA301"); // SceneType
+
+define("TAG_CFA_PATTERN","0xA302"); // CFA Pattern
+
+/** Tags in EXIF 2.2 Only */
+define("TAG_COMPRESS_SCHEME","0x0103"); //
+define("TAG_CUSTOM_RENDERED","0xA401"); // CustomRendered
+define("TAG_EXPOSURE_MODE","0xA402"); // Exposure mode ExposureMode
+define("TAG_WHITE_BALANCE","0xA403"); // White balance WhiteBalance
+define("TAG_DIGITAL_ZOOM_RATIO","0xA404"); // Digital zoom ratio DigitalZoomRatio
+define("TAG_FLENGTH_IN35MM","0xA405"); // Focal length in 35 mm film FocalLengthIn35mmFilm
+define("TAG_SCREEN_CAP_TYPE","0xA406"); // Scene capture type SceneCaptureType
+define("TAG_GAIN_CONTROL","0xA407"); //Gain control
+define("TAG_CONTRAST","0xA408"); // Contrast
+define("TAG_SATURATION","0xA409"); // Saturation
+define("TAG_SHARPNESS","0xA40A"); // Sharpness
+define("TAG_DEVICE_SETTING_DESC","0xA40B"); // SDevice settings description DeviceSettingDescription
+define("TAG_DIST_RANGE","0xA40C"); //Subject distance range SubjectDistanceRange
+
+define("TAG_FOCALPLANE_YRESOL","0xA20F");; //FocalPlaneYResolution
+define("TAG_BRIGHTNESS","0x9203");; //Brightness
+//--------------------------------
+/** error Description */
+/**
+ 1 - File does not exists!
+ 2 -
+ 3 - Filename not provided
+
+ 10 - too many padding bytes
+ 11 - "invalid marker"
+ 12 - Premature end of file?
+
+
+ 51 - "Illegal subdirectory link"
+ 52 - "NOT EXIF FORMAT"
+ 53 - "Invalid Exif alignment marker.\n"
+ 54 - "Invalid Exif start (1)"
+
+*/
+
+
+/**
+ * PHP Class to read, write and transfer EXIF information
+ * that most of the digital camera produces
+ * Currenty it can only read JPEG file.
+ */
+ /**
+ * @author Vinay Yadav (vinayRas) < vinay@sanisoft.com >
+ *
+ * @todo Writing exif information to the file.
+ * @todo Add EXIF audio reading methods (I think it exists!)
+ * @todo Support of additional tags.
+ * @todo Handling Unicode character in UserComment tag of EXif Information.
+ *
+ * @version 0.5
+ * @licence http://opensource.org/licenses/lgpl-license.php GNU LGPL
+ */
+class phpExifReader {
+
+ /***
+ * Array containg all Exif and JPEG image attributes
+ * into regular expressions for themselves.
+ * $ImageInfo[TAG] = TAG_VALUE;
+ *
+ * @var array
+ * @access private
+ *
+ */
+ var $ImageInfo = array();
+
+ var $MotorolaOrder = 0;
+ var $ExifImageWidth = 0; //
+ var $FocalplaneXRes = 0; //
+ var $FocalplaneUnits = 0; //
+ var $sections = array();
+ var $currSection = 0; /** Stores total number fo Sections */
+
+ var $BytesPerFormat = array(0,1,1,2,4,8,1,1,2,4,8,4,8);
+
+ var $ReadMode = array(
+ "READ_EXIF" => 1,
+ "READ_IMAGE" => 2,
+ "READ_ALL" => 3
+ );
+
+ var $ImageReadMode = 3; /** related to $RealMode arrays values */
+ var $file = ""; /** JPEG file to parse for EXIF data */
+ var $newFile = 1; /** flag to check if the current file has been parsed or not. */
+
+ var $thumbnail = ""; /* Name of thumbnail */
+ var $thumbnailURL = ""; /* */
+
+ var $exifSection = -1; // market the exif section index oout of all sections
+
+ var $errno = 0;
+ var $errstr = "";
+
+ var $debug = false;
+
+ // Caching ralated variables
+ var $caching = false; /* Should cacheing of image thumnails be allowed? */
+ var $cacheDir = ""; /* Checkout constructor for default path. */
+
+ /**
+ * Constructor
+ * @param string File name to be parsed.
+ *
+ */
+ function phpExifReader($file = "") {
+ $this->timeStart = $this->getmicrotime();
+ if(!empty($file)) {
+ $this->file = $file;
+ }
+
+ /**
+ * Initialize some variables. Avoid lots of errors with fulll error_reporting
+ */
+ $this->ExifImageLength = 0;
+ $this->ImageInfo['h']["resolutionUnit"] = 0;
+
+ $this->ImageInfo[TAG_MAXAPERTURE] = 0;
+ $this->ImageInfo[TAG_ISO_EQUIVALENT] = 0;
+ $this->ImageInfo[TAG_ORIENTATION] = 0;
+
+ $this->ThumbnailSize = 0;
+
+ if($this->caching) {
+ $this->cacheDir = dirname(__FILE__)."/.cache_thumbs";
+
+ /**
+ * If Cache directory does not exists then attempt to create it.
+ */
+ if(!is_dir($this->cacheDir)) {
+ mkdir($this->cacheDir);
+ }
+
+ // Prepare the ame of thumbnail
+ if(is_dir($this->cacheDir)) {
+ $this->thumbnail = $this->cacheDir."/".basename($this->file);
+ $this->thumbnailURL = ".cache_thumbs/".basename($this->file);
+ }
+ }
+
+ /** check if file exists! */
+ if(!file_exists($this->file)) {
+ $this->errno = 1;
+ $this->errstr = "File '".$this->file."' does not exists!";
+ }
+ $this->currSection = 0;
+
+ $this->processFile();
+ }
+
+ /**
+ * Show Debugging information
+ *
+ * @param string Debugging message to display
+ * @param int Type of error (0 - Warning, 1 - Error)
+ * @return void
+ *
+ */
+ function debug($str,$TYPE = 0,$file="",$line=0) {
+ if($this->debug) {
+ echo "<br>[$file:$line:".($this->getDiffTime())."]$str";
+ flush();
+ if($TYPE == 1) {
+ exit;
+ }
+ }
+ }
+
+ /**
+ * Processes the whole file.
+ *
+ */
+ function processFile() {
+ /** dont reparse the whole file. */
+ if(!$this->newFile) return true;
+
+ if(!file_exists($this->file)) {
+ echo "<br>Error: File ".($this->file)."does not exists!";
+ exit;
+ }
+
+ $this->debug("Stating Processing of ".$this->newFile,0,__FILE__,__LINE__);
+
+ $i = 0; $exitAll = 0;
+ /** Open the JPEG in binary safe reading mode */
+ $fp = fopen($this->file,"rb");
+
+ $this->ImageInfo["h"]["FileName"] = $this->file;
+ $this->ImageInfo["h"]["FileSize"] = filesize($this->file); /** Size of the File */
+ $this->ImageInfo["h"]["FileDateTime"] = filectime($this->file); /** File node change time */
+
+ /** check whether jped image or not */
+ $a = fgetc($fp);
+ if (ord($a) != 0xff || ord(fgetc($fp)) != M_SOI){
+ $this->debug("Not a JPEG FILE",1);
+ $this->errorno = 1;
+ $this->errorstr = "File '".$this->file."' is not a JPEG File!";
+ }
+ $tmpTestLevel = 0;
+ /** Examines each byte one-by-one */
+ while(!feof($fp)) {
+ $data = array();
+ for ($a=0;$a<7;$a++){
+ $marker = fgetc($fp);
+ if (ord($marker) != 0xff) break;
+ if ($a >= 6){
+ $this->errno = 10;
+ $this->errstr = "too many padding bytes!";
+ $this->debug($this->errstr,1);
+ return false;
+ }
+ }
+
+ if (ord($marker) == 0xff){
+ // 0xff is legal padding, but if we get that many, something's wrong.
+ $this->errno = 10;
+ $this->errstr = "too many padding bytes!";
+ $this->debug($this->errstr,1);
+ }
+
+ $marker = ord($marker);
+ $this->sections[$this->currSection]["type"] = $marker;
+
+ // Read the length of the section.
+ $lh = ord(fgetc($fp));
+ $ll = ord(fgetc($fp));
+
+ $itemlen = ($lh << 8) | $ll;
+
+ if ($itemlen < 2){
+ $this->errno = 11;
+ $this->errstr = "invalid marker";
+ $this->debug($this->errstr,1);
+ }
+ $this->sections[$this->currSection]["size"] = $itemlen;
+
+ $tmpDataArr = array(); /** Temporary Array */
+
+ $tmpStr = fread($fp,$itemlen-2);
+ /*
+ $tmpDataArr[] = chr($lh);
+ $tmpDataArr[] = chr($ll);
+
+ $chars = preg_split('//', $tmpStr, -1, PREG_SPLIT_NO_EMPTY);
+ $tmpDataArr = array_merge($tmpDataArr,$chars);
+
+ $data = $tmpDataArr;
+ */
+ $data = chr($lh).chr($ll).$tmpStr;
+
+ $this->sections[$this->currSection]["data"] = $data;
+
+ $this->debug("<hr><h1>".$this->currSection.":</h1>");
+ //print_r($data);
+ $this->debug("<hr>");
+
+ //if(count($data) != $itemlen) {
+ if(strlen($data) != $itemlen) {
+ $this->errno = 12;
+ $this->errstr = "Premature end of file?";
+ $this->debug($this->errstr,1);
+ }
+
+ $this->currSection++; /** */
+
+ switch($marker) {
+ case M_SOS:
+ $this->debug("<br>Found '".M_SOS."' Section, Prcessing it... <br>");;
+ // If reading entire image is requested, read the rest of the data.
+ if ($this->ImageReadMode & $this->ReadMode["READ_IMAGE"]){
+ // Determine how much file is left.
+ $cp = ftell($fp);
+ fseek($fp,0, SEEK_END);
+ $ep = ftell($fp);
+ fseek($fp, $cp, SEEK_SET);
+
+ $size = $ep-$cp;
+ $got = fread($fp, $size);
+
+ $this->sections[$this->currSection]["data"] = $got;
+ $this->sections[$this->currSection]["size"] = $size;
+ $this->sections[$this->currSection]["type"] = PSEUDO_IMAGE_MARKER;
+ $this->currSection++;
+ $HaveAll = 1;
+ $exitAll =1;
+ }
+ $this->debug("<br>'".M_SOS."' Section, PROCESSED<br>");
+ break;
+ case M_COM: // Comment section
+ $this->debug("<br>Found '".M_COM."'(Comment) Section, Processing<br>");
+ $this->process_COM($data, $itemlen);
+ $this->debug("<br>'".M_COM."'(Comment) Section, PROCESSED<br>");
+
+ $tmpTestLevel++;
+ break;
+ case M_SOI:
+ $this->debug(" <br> === START OF IMAGE =====<br>");
+ break;
+ case M_EOI:
+ $this->debug(" <br>=== END OF IMAGE =====<br> ");
+ break;
+ case M_JFIF:
+ // Regular jpegs always have this tag, exif images have the exif
+ // marker instead, althogh ACDsee will write images with both markers.
+ // this program will re-create this marker on absence of exif marker.
+ // hence no need to keep the copy from the file.
+ //echo " <br> === M_JFIF =====<br>";
+ $this->sections[--$this->currSection]["data"] = "";
+ break;
+ case M_EXIF:
+ // Seen files from some 'U-lead' software with Vivitar scanner
+ // that uses marker 31 for non exif stuff. Thus make sure
+ // it says 'Exif' in the section before treating it as exif.
+ $this->debug("<br>Found '".M_EXIF."'(Exif) Section, Proccessing<br>");
+ $this->exifSection = $this->currSection-1;
+ if (($this->ImageReadMode & $this->ReadMode["READ_EXIF"]) && ($data[2].$data[3].$data[4].$data[5]) == "Exif"){
+ $this->process_EXIF($data, $itemlen);
+ }else{
+ // Discard this section.
+ $this->sections[--$this->currSection]["data"] = "";
+ }
+ $this->debug("<br>'".M_EXIF."'(Exif) Section, PROCESSED<br>");
+ $tmpTestLevel++;
+ break;
+ case M_SOF0:
+ case M_SOF1:
+ case M_SOF2:
+ case M_SOF3:
+ case M_SOF5:
+ case M_SOF6:
+ case M_SOF7:
+ case M_SOF9:
+ case M_SOF10:
+ case M_SOF11:
+ case M_SOF13:
+ case M_SOF14:
+ case M_SOF15:
+ $this->debug("<br>Found M_SOFn Section, Processing<br>");
+ $this->process_SOFn($data,$marker);
+ $this->debug("<br>M_SOFn Section, PROCESSED<br>");
+ break;
+ default:
+ $this->debug("DEFAULT: Jpeg section marker 0x$marker x size $itemlen\n");
+ }
+ $i++;
+ if($exitAll == 1) break;
+ //if($tmpTestLevel == 2) break;
+ }
+ fclose($fp);
+ $this->newFile = 0;
+ }
+
+ /**
+ * Changing / Assiging new file
+ * @param string JPEG file to process
+ *
+ */
+ function assign($file) {
+
+ if(!empty($file)) {
+ $this->file = $file;
+ }
+
+ /** check for existance of file! */
+ if(!file_exists($this->file)) {
+ $this->errorno = 1;
+ $this->errorstr = "File '".$this->file."' does not exists!";
+ }
+ $this->newFile = 1;
+ }
+
+ /**
+ * Process SOFn section of Image
+ * @param array An array containing whole section.
+ * @param hex Marker to specify the type of section.
+ *
+ */
+ function process_SOFn($data,$marker) {
+ $data_precision = 0;
+ $num_components = 0;
+
+ $data_precision = ord($data[2]);
+
+ if($this->debug) {
+ print("Image Dimension Calculation:");
+ print("((ord($data[3]) << 8) | ord($data[4]));");
+ }
+ $this->ImageInfo["h"]["Height"] = ((ord($data[3]) << 8) | ord($data[4]));
+ $this->ImageInfo["h"]["Width"] = ((ord($data[5]) << 8) | ord($data[6]));
+
+ $num_components = ord($data[7]);
+
+ if ($num_components == 3){
+ $this->ImageInfo["h"]["IsColor"] = 1;
+ }else{
+ $this->ImageInfo["h"]["IsColor"] = 0;
+ }
+
+ $this->ImageInfo["h"]["Process"] = $marker;
+ $this->debug("JPEG image is ".$this->ImageInfo["h"]["Width"]." * ".$this->ImageInfo["h"]["Height"].", $num_components color components, $data_precision bits per sample\n");
+ }
+
+ /**
+ * Process Comments
+ * @param array Section data
+ * @param int Length of the section
+ *
+ */
+ function process_COM($data,$length) {
+ if ($length > MAX_COMMENT) $length = MAX_COMMENT;
+ /** Truncate if it won't fit in our structure. */
+
+ $nch = 0; $Comment = "";
+ for ($a=2;$a<$length;$a++){
+ $ch = $data[$a];
+ if ($ch == '\r' && $data[$a+1] == '\n') continue; // Remove cr followed by lf.
+
+ $Comment .= $ch;
+ }
+ //$this->ImageInfo[M_COM] = $Comment;
+ $this->ImageInfo["h"]["imageComment"] = $Comment;
+ $this->debug("COM marker comment: $Comment\n");
+ }
+ /**
+ * Process one of the nested EXIF directories.
+ * @param string All directory information
+ * @param string whole Section
+ * @param int Length of exif section
+ *
+ */
+ function ProcessExifDir($DirStart, $OffsetBase, $ExifLength) {
+
+ $NumDirEntries = 0;
+ $ValuePtr = array();
+
+ $NumDirEntries = $this->Get16u($DirStart[0],$DirStart[1]);
+
+
+ $this->debug("<br>Directory with $NumDirEntries entries\n");
+
+ for ($de=0;$de<$NumDirEntries;$de++){
+ //$DirEntry = array_slice($DirStart,2+12*$de);
+ $DirEntry = substr($DirStart,2+12*$de);
+
+ $Tag = $this->Get16u($DirEntry[0],$DirEntry[1]);
+ $Format = $this->Get16u($DirEntry[2],$DirEntry[3]);
+ $Components = $this->Get32u($DirEntry[4],$DirEntry[5],$DirEntry[6],$DirEntry[7]);
+
+ /**
+ if ((Format-1) >= NUM_FORMATS) {
+ // (-1) catches illegal zero case as unsigned underflows to positive large.
+ ErrNonfatal("Illegal number format %d for tag %04x", Format, Tag);
+ continue;
+ }
+ */
+
+ $ByteCount = $Components * $this->BytesPerFormat[$Format];
+
+ if ($ByteCount > 4){
+ $OffsetVal = $this->Get32u($DirEntry[8],$DirEntry[9],$DirEntry[10],$DirEntry[11]);
+ if ($OffsetVal+$ByteCount > $ExifLength){
+ $this->debug("Illegal value pointer($OffsetVal) for tag $Tag",1);
+ }
+ //$ValuePtr = array_slice($OffsetBase,$OffsetVal);
+ $ValuePtr = substr($OffsetBase,$OffsetVal);
+ } else {
+ //$ValuePtr = array_slice($DirEntry,8);
+ $ValuePtr = substr($DirEntry,8);
+ }
+
+ switch($Tag){
+
+ case TAG_MAKE:
+ $this->ImageInfo["h"]["make"] = substr($ValuePtr,0,$ByteCount);
+ break;
+
+ case TAG_MODEL:
+ $this->ImageInfo["h"]["model"] = substr($ValuePtr,0,$ByteCount);
+ break;
+
+ case TAG_DATETIME_ORIGINAL:
+ $this->ImageInfo[TAG_DATETIME_ORIGINAL] = substr($ValuePtr,0,$ByteCount);
+ $this->ImageInfo["h"]["DateTime"] = substr($ValuePtr,0,$ByteCount);
+ break;
+
+ case TAG_USERCOMMENT:
+ // Olympus has this padded with trailing spaces. Remove these first.
+ for ($a=$ByteCount;;){
+ $a--;
+ if ($ValuePtr[$a] == ' '){
+ //$ValuePtr[$a] = '\0';
+ } else {
+ break;
+ }
+ if ($a == 0) break;
+ }
+
+ // Copy the comment
+ if (($ValuePtr[0].$ValuePtr[1].$ValuePtr[2].$ValuePtr[3].$ValuePtr[4]) == "ASCII"){
+ for ($a=5;$a<10;$a++){
+ $c = $ValuePtr[$a];
+ if ($c != '\0' && $c != ' '){
+ $tmp = substr($ValuePtr,0,$ByteCount);
+ break;
+ }
+ }
+ } else if (($ValuePtr[0].$ValuePtr[1].$ValuePtr[2].$ValuePtr[3].$ValuePtr[4].$ValuePtr[5].$ValuePtr[6]) == "Unicode"){
+ $tmp = substr($ValuePtr,0,$ByteCount);
+ // * Handle Unicode characters here...
+ } else {
+ //$this->ImageInfo[TAG_USERCOMMENT] = implode("",array_slice($ValuePtr,0,$ByteCount));
+ $tmp = substr($ValuePtr,0,$ByteCount);
+ }
+ $this->ImageInfo['h']["exifComment"] = $tmp;
+ break;
+
+ case TAG_ARTIST:
+ $this->ImageInfo['h']["artist"] = substr($ValuePtr,0,$ByteCount);
+ break;
+
+ case TAG_COPYRIGHT:
+ $this->ImageInfo['h']["copyright"] = htmlentities(substr($ValuePtr,0,$ByteCount));
+ break;
+
+ case TAG_FNUMBER:
+ // Simplest way of expressing aperture, so I trust it the most.
+ // (overwrite previously computd value if there is one)
+ $tmp = $this->ConvertAnyFormat(substr($ValuePtr,0), $Format);
+ $this->ImageInfo['h']["fnumber"] = sprintf("f/%3.1f",(double)$tmp[0]);
+ break;
+
+ case TAG_APERTURE:
+ case TAG_MAXAPERTURE:
+ // More relevant info always comes earlier, so only use this field if we don't
+ // have appropriate aperture information yet.
+ if (!isset($this->ImageInfo['h']["aperture"])){
+ $tmpArr = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["aperture"] = exp($tmpArr[0]*log(2)*0.5);
+ }
+ break;
+
+ case TAG_FOCALLENGTH:
+ // Nice digital cameras actually save the focal length as a function
+ // of how farthey are zoomed in.
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["focalLength"] = sprintf("%4.2f (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ if (isset($this->ImageInfo['h']["CCDWidth"])){
+ $this->ImageInfo['h']["focalLength"] .= sprintf("(35mm equivalent: %dmm)",(int)($tmp[0]/$this->ImageInfo['h']["CCDWidth"]*36 + 0.5));
+ }
+ break;
+
+ case TAG_SUBJECT_DISTANCE:
+ // Inidcates the distacne the autofocus camera is focused to.
+ // Tends to be less accurate as distance increases.
+ //$this->ImageInfo["h"]["Distance"] = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["Distance"] = sprintf("%4.2f (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ if ($this->ImageInfo['h']["Distance"] < 0){
+ $this->ImageInfo['h']["focusDistance"] = "Infinite";
+ } else {
+ $this->ImageInfo['h']["focusDistance"] = sprintf("%4.2fm",(double)$this->ImageInfo['h']["Distance"]);
+ }
+
+
+ break;
+
+ case TAG_EXPOSURETIME:
+ // Simplest way of expressing exposure time, so I trust it most.
+ // (overwrite previously computd value if there is one)
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["exposureTime"] = sprintf("%6.3f s (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ if ($tmp[0] <= 0.5){
+ $this->ImageInfo['h']["exposureTime"] .= sprintf(" (1/%d)",(int)(0.5 + 1/$tmp[0]));
+ }
+ break;
+
+ case TAG_SHUTTERSPEED:
+ // More complicated way of expressing exposure time, so only use
+ // this value if we don't already have it from somewhere else.
+ if (isset($this->ImageInfo[TAG_EXPOSURETIME]) && $this->ImageInfo[TAG_EXPOSURETIME] == 0){
+ $sp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo[TAG_SHUTTERSPEED] = (1/exp($sp[0]*log(2)));
+ }
+ break;
+
+ case TAG_FLASH:
+ $this->ImageInfo["h"]["flashUsed"] = "No";
+ if ($this->ConvertAnyFormat($ValuePtr, $Format) & 7){
+ $this->ImageInfo["h"]["flashUsed"] = "Yes";
+ }
+ break;
+
+ case TAG_ORIENTATION:
+ $this->ImageInfo[TAG_ORIENTATION] = $this->ConvertAnyFormat($ValuePtr, $Format);
+ if ($this->ImageInfo[TAG_ORIENTATION] < 1 || $this->ImageInfo[TAG_ORIENTATION] > 8){
+ $this->debug(sprintf("Undefined rotation value %d", $this->ImageInfo[TAG_ORIENTATION], 0),1);
+ $this->ImageInfo[TAG_ORIENTATION] = 0;
+ }
+ break;
+
+ case TAG_EXIF_IMAGELENGTH:
+ // * Image height
+ $a = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+ if ($this->ExifImageLength < $a) $this->ExifImageLength = $a;
+ $this->ImageInfo[TAG_EXIF_IMAGELENGTH] = $this->ExifImageLength;
+ $this->ImageInfo["h"]["Height"] = $this->ExifImageLength;
+ break;
+ case TAG_EXIF_IMAGEWIDTH:
+ // Use largest of height and width to deal with images that have been
+ // rotated to portrait format.
+ $a = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+ if ($this->ExifImageWidth < $a) $this->ExifImageWidth = $a;
+ $this->ImageInfo[TAG_EXIF_IMAGEWIDTH] = $this->ExifImageWidth;
+ $this->ImageInfo["h"]["Width"] = $this->ExifImageWidth;
+
+ break;
+
+ case TAG_FOCALPLANEXRES:
+ $this->FocalplaneXRes = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->FocalplaneXRes = $this->FocalplaneXRes[0];
+ $this->ImageInfo[TAG_FOCALPLANEXRES] = $this->FocalplaneXRes[0];
+ break;
+
+ case TAG_FOCALPLANEUNITS:
+ switch($this->ConvertAnyFormat($ValuePtr, $Format)){
+ case 1: $this->FocalplaneUnits = 25.4; break; // inch
+ case 2:
+ // According to the information I was using, 2 means meters.
+ // But looking at the Cannon powershot's files, inches is the only
+ // sensible value.
+ $this->FocalplaneUnits = 25.4;
+ break;
+
+ case 3: $this->FocalplaneUnits = 10; break; // centimeter
+ case 4: $this->FocalplaneUnits = 1; break; // milimeter
+ case 5: $this->FocalplaneUnits = .001; break; // micrometer
+ }
+ $this->ImageInfo[TAG_FOCALPLANEUNITS] = $this->FocalplaneUnits;
+ break;
+
+ // Remaining cases contributed by: Volker C. Schoech (schoech@gmx.de)
+
+ case TAG_EXPOSURE_BIAS:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["exposureBias"] = sprintf("%4.2f (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ break;
+
+ case TAG_WHITEBALANCE:
+ $tmp = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("1"=>"Sunny","2"=>"fluorescent","3"=>"incandescent");
+ $this->ImageInfo['h']["whiteBalance"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Cloudy");
+ break;
+
+ case TAG_METERING_MODE:
+ $tmp = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+
+ $tmpArr = array("2"=>"center weight","3"=>"spot","5"=>"matrix");
+ $this->ImageInfo['h']["meteringMode"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+
+ case TAG_EXPOSURE_PROGRAM:
+ $tmp = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("2"=>"program (auto)","3"=>"aperture priority (semi-auto)","4"=>"shutter priority (semi-auto)");
+ $this->ImageInfo['h']["exposure"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+
+ break;
+
+ case TAG_ISO_EQUIVALENT:
+ $tmp = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+ if ( $tmp < 50 ) $tmp *= 200;
+ $this->ImageInfo['h']["isoEquiv"] = sprintf("%2d",(int)$tmp);
+ break;
+
+ case TAG_COMPRESSION_LEVEL:
+ $tmp = (int) $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("1"=>"Basic","2"=>"Normal","4"=>"Fine");
+ $this->ImageInfo['h']["jpegQuality"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+
+ case TAG_THUMBNAIL_OFFSET:
+ $this->ThumbnailOffset = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->DirWithThumbnailPtrs = $DirStart;
+ break;
+
+ case TAG_THUMBNAIL_LENGTH:
+ $this->ThumbnailSize = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo[TAG_THUMBNAIL_LENGTH] = $this->ThumbnailSize;
+ break;
+
+ //----------------------------------------------
+ case TAG_IMAGE_DESC:
+ $this->ImageInfo['h']["imageDesc"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_X_RESOLUTION:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["xResolution"] = sprintf("%4.2f (%d/%d) %s",(double)$tmp[0],$tmp[1][0],$tmp[1][1],$this->ImageInfo['h']["resolutionUnit"]);
+ break;
+ case TAG_Y_RESOLUTION:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["yResolution"] = sprintf("%4.2f (%d/%d) %s",(double)$tmp[0],$tmp[1][0],$tmp[1][1],$this->ImageInfo['h']["resolutionUnit"]);
+ break;
+ case TAG_RESOLUTION_UNIT:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("2"=>"Inches","3"=>"Centimeters");
+
+ $this->ImageInfo['h']["resolutionUnit"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_SOFTWARE:
+ $this->ImageInfo['h']["software"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_FILE_MODDATE;
+ $this->ImageInfo['h']["fileModifiedDate"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_YCBCR_POSITIONING:
+ $this->ImageInfo['h']["YCbCrPositioning"] = $this->ConvertAnyFormat($ValuePtr, $Format);
+ break;
+ case TAG_EXIF_VERSION:
+ $this->ImageInfo['h']["exifVersion"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_DATE_TIME_DIGITIZED:
+ $this->ImageInfo['h']["dateTimeDigitized"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_COMPONENT_CONFIG: // need more tests for this
+ $tmp = (int)$this->ConvertAnyFormat($ValuePtr, $Format);
+
+ $tmpArr = array("0"=>"Does Not Exists","1"=>"Y","2"=>"Cb","3"=>"Cr","4"=>"R","5"=>"G","6"=>"B");
+
+ if(strlen($tmp) < 4 ) {
+ $this->ImageInfo['h']["componentConfig"] = $tmpArr["0"];
+ } else {
+ for($i=0;$i<strlen($tmp);$i++) {
+ if($tmp["$i"] != 0) {
+ $this->ImageInfo['h']["componentConfig"] .= $tmpArr[$tmp["$i"]];
+ }
+ }
+ }
+ break;
+ case TAG_MAKER_NOTE:
+ //$this->ImageInfo['h']["makerNote"] = substr($ValuePtr,0,$ByteCount);
+ $this->ImageInfo['h']["makerNote"] = "NOT IMPLEMENTED";
+ break;
+ case TAG_SUB_SEC_TIME:
+ $this->ImageInfo['h']["subSectionTime"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_SUB_SEC_TIME_ORIG:
+ $this->ImageInfo['h']["subSectionTimeOriginal"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_SUB_SEC_TIME_DIGITIZED:
+ $this->ImageInfo['h']["subSectionTimeDigtized"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_FLASHPIX_VER:
+ $this->ImageInfo['h']["flashpixVersion"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_COLOR_SPACE:
+ $this->ImageInfo['h']["colorSpace"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_RELATED_SOUND_FILE:
+ $this->ImageInfo['h']["relatedSoundFile"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_GPS_LATITUDE_REF:
+ $this->ImageInfo['h']["GPSLatitudeRef"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_GPS_LATITUDE:
+ $this->ImageInfo['h']["GPSLatitude"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_SENSING_METHOD:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("1"=>"Not Defined","2"=>"One-chip color area sensor","3"=>"Two-chip color area sensor",
+ "4"=>"Three -chip color area sensor","5"=>"Color sequential area sensor",
+ "6"=>"Trilinear sensor", "7"=>"Color sequential linear sensor"
+ );
+
+ $this->ImageInfo['h']["sensing"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_SOUCE_TYPE:
+ $this->ImageInfo['h']["sourceType"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_SCENE_TYPE:
+ $this->ImageInfo['h']["sceneType"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_CFA_PATTERN:
+ $this->ImageInfo['h']["CFAPattern"] = substr($ValuePtr,0,$ByteCount);
+ break;
+ case TAG_CUSTOM_RENDERED:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["customRendered"] = ($mp == 0) ? 'Normal Process' : ($mp == 1 ? 'Custom Process' : 'Reserved');
+ break;
+ case TAG_EXPOSURE_MODE:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array('Auto Exposure','Manual Exposure','Auto Bracket');
+ $this->ImageInfo['h']["exposureMode"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_WHITE_BALANCE:
+ $this->ImageInfo['h']["whiteBalance"] = $this->ConvertAnyFormat($ValuePtr, $Format);
+ break;
+ case TAG_DIGITAL_ZOOM_RATIO:
+ $tmp = $this->ImageInfo['h']["zoomRatio"] = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["zoomRatio"] = sprintf("%4.2f (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ break;
+ case TAG_FLENGTH_IN35MM:
+ $this->ImageInfo['h']["flength35mm"] = $this->ConvertAnyFormat($ValuePtr, $Format);
+ break;
+ case TAG_SCREEN_CAP_TYPE:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("Standard","Landscape","Portrait","Night Scene");
+ $this->ImageInfo['h']["screenCaptureType"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_GAIN_CONTROL:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("None","Low Gain Up","High Gain Up","Low Gain Down","High Gain Down");
+ $this->ImageInfo['h']["gainControl"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_CONTRAST:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("Normal","Soft","Hard");
+ $this->ImageInfo['h']["contrast"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_SATURATION:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("Normal","Low Saturation","High Saturation");
+ $this->ImageInfo['h']["saturation"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_SHARPNESS:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("Normal","Soft","Hard");
+ $this->ImageInfo['h']["sharpness"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_DIST_RANGE:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("Unknown","Macro","Close View","Distant View");
+ $this->ImageInfo['h']["distanceRange"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_DEVICE_SETTING_DESC:
+ /*
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("Unknown","Macro","Close View","Distant View");
+ $this->ImageInfo['h']["distanceRange"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ */
+ $this->ImageInfo['h']["deviceSettingDesc"] = "NOT IMPLEMENTED";
+ break;
+ case TAG_COMPRESS_SCHEME:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("1"=>"Uncompressed","6"=>"JPEG compression (thumbnails only)");
+ $this->ImageInfo['h']["compressScheme"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_IMAGE_WD:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegImageWidth"] = $tmp;
+ break;
+ case TAG_IMAGE_HT:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegImageHeight"] = $tmp;
+ break;
+ case TAG_IMAGE_BPS:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegBitsPerSample"] = $tmp;
+ break;
+ case TAG_IMAGE_PHOTO_INT:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegPhotometricInt"] = $tmp;
+ $tmpArr = array("2"=>"RGB","6"=>"YCbCr");
+ $this->ImageInfo['h']["jpegPhotometricInt"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+
+ break;
+ case TAG_IMAGE_SOFFSET:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegStripOffsets"] = $tmp;
+ break;
+ case TAG_IMAGE_SPP:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegSamplesPerPixel"] = $tmp;
+ break;
+ case TAG_IMAGE_RPS:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegRowsPerStrip"] = $tmp;
+ break;
+ case TAG_IMAGE_SBC:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["jpegStripByteCounts"] = $tmp;
+ break;
+ case TAG_IMAGE_P_CONFIG:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $tmpArr = array("1"=>"Chunky Format","2"=>"Planar Format");
+ $this->ImageInfo['h']["jpegPlanarConfig"] =
+ (isset($tmpArr["$tmp"]) ? $tmpArr["$tmp"] : "Reserved");
+ break;
+ case TAG_FOCALPLANE_YRESOL:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["focalPlaneYResolution"] = sprintf("%4.2f (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ break;
+ case TAG_BRIGHTNESS:
+ $tmp = $this->ConvertAnyFormat($ValuePtr, $Format);
+ $this->ImageInfo['h']["brightness"] = sprintf("%4.2f (%d/%d)",(double)$tmp[0],$tmp[1][0],$tmp[1][1]);
+ break;
+ //---------------------------------------------
+ case TAG_EXIF_OFFSET:
+ case TAG_INTEROP_OFFSET:
+ {
+
+ $SubdirStart = substr($OffsetBase,$this->Get32u($ValuePtr[0],$ValuePtr[1],$ValuePtr[2],$ValuePtr[3]));
+ //if ($SubdirStart < $OffsetBase || $SubdirStart > $OffsetBase+$ExifLength){
+ // debug("Illegal exif or interop ofset directory link",1);
+ //}else{
+ //echo "<h1>Calling sub-exif dir</h1>";
+ $this->ProcessExifDir($SubdirStart, $OffsetBase, $ExifLength);
+ //}
+ continue;
+ }
+ default: {
+ $this->debug("UNKNOWN TAG: $Tag");
+ }
+ }
+ }
+
+ {
+ // In addition to linking to subdirectories via exif tags,
+ // there's also a potential link to another directory at the end of each
+ // directory. this has got to be the result of a comitee!
+ $tmpDirStart = substr($DirStart,2+12*$NumDirEntries);
+ if (strlen($tmpDirStart) + 4 <= strlen($OffsetBase)+$ExifLength){
+ $Offset = $this->Get32u($tmpDirStart[0],$tmpDirStart[1],$tmpDirStart[2],$tmpDirStart[3]);
+ if ($Offset){
+ $SubdirStart = substr($OffsetBase,$Offset);
+ if (strlen($SubdirStart) > strlen($OffsetBase)+$ExifLength){
+ if (strlen($SubdirStart) < strlen($OffsetBase)+$ExifLength+20){
+ // Jhead 1.3 or earlier would crop the whole directory!
+ // As Jhead produces this form of format incorrectness,
+ // I'll just let it pass silently
+ } else {
+ $this->errno = 51;
+ $this->errstr = "Illegal subdirectory link";
+ $this->debug($this->errstr,1);
+ }
+ }else{
+ if (strlen($SubdirStart) <= strlen($OffsetBase)+$ExifLength){
+ $this->ProcessExifDir($SubdirStart, $OffsetBase, $ExifLength);
+ }
+ }
+ }
+ } else {
+ // The exif header ends before the last next directory pointer.
+ }
+ }
+
+ /**
+ * Check if thumbnail has been cached or not.
+ * If yes! then read the file.
+ */
+ if(file_exists($this->thumbnail) && $this->caching && (filemtime($this->thumbnail) == filemtime($this->file) )) {
+ $this->ImageInfo["h"]["Thumbnail"] = $this->thumbnail;
+ $this->ImageInfo["h"]["ThumbnailSize"] = sprintf("%d bytes",filesize($this->thumbnail));
+ } else{
+ if ($this->ThumbnailSize && $this->ThumbnailOffset){
+ if ($this->ThumbnailSize + $this->ThumbnailOffset <= $ExifLength){
+ // The thumbnail pointer appears to be valid. Store it.
+ $this->ImageInfo["h"]["Thumbnail"] = substr($OffsetBase,$this->ThumbnailOffset);
+
+ // Save the thumbnail /
+ if($this->caching && is_dir($this->cacheDir)) {
+ $this->saveThumbnail($this->thumbnail);
+ $this->ImageInfo["h"]["Thumbnail"] = $this->thumbnail;
+ }
+ $this->ImageInfo["h"]["ThumbnailSize"] = sprintf("%d bytes",strlen($this->ImageInfo["h"]["Thumbnail"]));
+ }
+ }
+ }
+ }
+
+ /**
+ * Process Exif data
+ * @param array Section data as an array
+ * @param int Length of the section (length of data array)
+ *
+ */
+ function process_EXIF($data,$length) {
+
+ $this->debug("Exif header $length bytes long\n");
+ if(($data[2].$data[3].$data[4].$data[5]) != "Exif") {
+ $this->errno = 52;
+ $this->errstr = "NOT EXIF FORMAT";
+ $this->debug($this->errstr,1);
+ }
+
+ $this->ImageInfo["h"]["FlashUsed"] = 0;
+ /** If it s from a digicam, and it used flash, it says so. */
+
+ $this->FocalplaneXRes = 0;
+ $this->FocalplaneUnits = 0;
+ $this->ExifImageWidth = 0;
+
+ if(($data[8].$data[9]) == "II") {
+ $this->debug("Exif section in Intel order\n");
+ $this->MotorolaOrder = 0;
+ } else if(($data[8].$data[9]) == "MM") {
+ $this->debug("Exif section in Motorola order\n");
+ $this->MotorolaOrder = 1;
+ } else {
+ $this->errno = 53;
+ $this->errstr = "Invalid Exif alignment marker.\n";
+ $this->debug($this->errstr,1);
+ return;
+ }
+
+ if($this->Get16u($data[10],$data[11]) != 0x2A || $this->Get32s($data[12],$data[13],$data[14],$data[15]) != 0x08) {
+ $this->errno = 54;
+ $this->errstr = "Invalid Exif start (1)";
+ $this->debug($this->errstr,1);
+ }
+
+ $DirWithThumbnailPtrs = NULL;
+
+ //$this->ProcessExifDir(array_slice($data,16),array_slice($data,8),$length);
+ $this->ProcessExifDir(substr($data,16),substr($data,8),$length);
+
+ // Compute the CCD width, in milimeters. 2
+ if ($this->FocalplaneXRes != 0){
+ $this->ImageInfo["h"]["CCDWidth"] = sprintf("%4.2fmm",(float)($this->ExifImageWidth * $this->FocalplaneUnits / $this->FocalplaneXRes));
+ }
+
+ $this->debug("Non settings part of Exif header: ".$length." bytes\n");
+ } // end of function process_EXIF
+
+ /**
+ * Converts two byte number into its equivalent int integer
+ * @param int
+ * @param int
+ *
+ */
+ function Get16u($val,$by) {
+ if($this->MotorolaOrder){
+ return ((ord($val) << 8) | ord($by));
+ } else {
+ return ((ord($by) << 8) | ord($val));
+ }
+ }
+
+ /**
+ * Converts 4-byte number into its equivalent integer
+ *
+ * @param int
+ * @param int
+ * @param int
+ * @param int
+ *
+ * @return int
+ */
+ function Get32s($val1,$val2,$val3,$val4)
+ {
+ $val1 = ord($val1);
+ $val2 = ord($val2);
+ $val3 = ord($val3);
+ $val4 = ord($val4);
+
+ if ($this->MotorolaOrder){
+ return (($val1 << 24) | ($val2 << 16) | ($val3 << 8 ) | ($val4 << 0 ));
+ }else{
+ return (($val4 << 24) | ($val3 << 16) | ($val2 << 8 ) | ($val1 << 0 ));
+ }
+ }
+ /**
+ * Converts 4-byte number into its equivalent integer with the help of Get32s
+ *
+ * @param int
+ * @param int
+ * @param int
+ * @param int
+ *
+ * @return int
+ *
+ */
+ function get32u($val1,$val2,$val3,$val4) {
+ return ($this->Get32s($val1,$val2,$val3,$val4) & 0xffffffff);
+ }
+
+ //--------------------------------------------------------------------------
+ // Evaluate number, be it int, rational, or float from directory.
+ //--------------------------------------------------------------------------
+ function ConvertAnyFormat($ValuePtr, $Format)
+ {
+ $Value = 0;
+
+ switch($Format){
+ case FMT_SBYTE: $Value = $ValuePtr[0]; break;
+ case FMT_BYTE: $Value = $ValuePtr[0]; break;
+
+ case FMT_USHORT: $Value = $this->Get16u($ValuePtr[0],$ValuePtr[1]); break;
+ case FMT_ULONG: $Value = $this->Get32u($ValuePtr[0],$ValuePtr[1],$ValuePtr[2],$ValuePtr[3]); break;
+
+ case FMT_URATIONAL:
+ case FMT_SRATIONAL:
+ {
+
+ $Num = $this->Get32s($ValuePtr[0],$ValuePtr[1],$ValuePtr[2],$ValuePtr[3]);
+ $Den = $this->Get32s($ValuePtr[4],$ValuePtr[5],$ValuePtr[6],$ValuePtr[7]);
+ if ($Den == 0){
+ $Value = 0;
+ }else{
+ $Value = (double) ($Num/$Den);
+ }
+ return array($Value,array($Num,$Den));
+ break;
+ }
+
+ case FMT_SSHORT: $Value = $this->Get16u($ValuePtr[0],$ValuePtr[1]); break;
+ case FMT_SLONG: $Value = $this->Get32s($ValuePtr[0],$ValuePtr[1],$ValuePtr[2],$ValuePtr[3]); break;
+
+ // Not sure if this is correct (never seen float used in Exif format)
+ case FMT_SINGLE: $Value = $ValuePtr[0]; break;
+ case FMT_DOUBLE: $Value = $ValuePtr[0]; break;
+ }
+ return $Value;
+ }
+
+ /**
+ * Function to extract thumbnail from Exif data of the image.
+ * and store it in a filename given by $ThumbFile
+ *
+ * @param String Files name to store the thumbnail
+ *
+ */
+ function saveThumbnail($ThumbFile) {
+ $ThumbFile = trim($ThumbFile);
+ $file = basename($this->file);
+
+ if(empty($ThumbFile)) $ThumbFile = "th_$file";
+
+ if (!empty($this->ImageInfo["h"]["Thumbnail"])){
+ $tp = fopen($ThumbFile,"wb");
+ if(!$tp) {
+ $this->errno = 2;
+ $this->errstr = "Cannot Open file '$ThumbFile'";
+ }
+ fwrite($tp,$this->ImageInfo["h"]["Thumbnail"]);
+ fclose($tp);
+ touch($ThumbFile,filemtime($this->file));
+ }
+ //$this->thumbnailURL = $ThumbFile;
+ $this->ImageInfo["h"]["Thumbnail"] = $ThumbFile;
+ }
+
+ /**
+ * Returns thumbnail url along with parameter supplied.
+ * Should be called in src attribute of image
+ *
+ * @return string File URL
+ *
+ */
+ function showThumbnail() {
+ return "showThumbnail.php?file=".$this->file;
+ //$this->ImageInfo["h"]["Thumbnail"]
+ }
+
+ /**
+ * Function to give back thumbail image
+ * @return string full image
+ *
+ */
+ function getThumbnail() {
+ return $this->ImageInfo["h"]["Thumbnail"];
+ }
+
+ /**
+ *
+ */
+ function getImageInfo() {
+
+ $imgInfo = $this->ImageInfo["h"];
+
+ if ( !isset ( $imgInfo["Width"] ) ) return array () ;
+
+ $retArr = $imgInfo;
+ $retArr["FileName"] = $imgInfo["FileName"];
+ $retArr["FileSize"] = $imgInfo["FileSize"]." bytes";
+
+ $retArr["FileDateTime"] = date("d-M-Y H:i:s",$imgInfo["FileDateTime"]);
+
+ $retArr["resolution"] = $imgInfo["Width"]."x".$imgInfo["Height"];
+
+
+ if ($this->ImageInfo[TAG_ORIENTATION] > 1){
+ // Only print orientation if one was supplied, and if its not 1 (normal orientation)
+
+ // 1 - "The 0th row is at the visual top of the image, and the 0th column is the visual left-hand side."
+ // 2 - "The 0th row is at the visual top of the image, and the 0th column is the visual right-hand side."
+ // 3 - "The 0th row is at the visual bottom of the image, and the 0th column is the visual right-hand side."
+ // 4 - "The 0th row is at the visual bottom of the image, and the 0th column is the visual left-hand side."
+
+ // 5 - "The 0th row is the visual left-hand side of of the image, and the 0th column is the visual top."
+ // 6 - "The 0th row is the visual right-hand side of of the image, and the 0th column is the visual top."
+ // 7 - "The 0th row is the visual right-hand side of of the image, and the 0th column is the visual bottom."
+ // 8 - "The 0th row is the visual left-hand side of of the image, and the 0th column is the visual bottom."
+
+ // Note: The descriptions here are the same as the name of the command line
+ // ption to pass to jpegtran to right the image
+ $OrientTab = array(
+ "Undefined",
+ "Normal", // 1
+ "flip horizontal", // left right reversed mirror
+ "rotate 180", // 3
+ "flip vertical", // upside down mirror
+ "transpose", // Flipped about top-left <--> bottom-right axis.
+ "rotate 90", // rotate 90 cw to right it.
+ "transverse", // flipped about top-right <--> bottom-left axis
+ "rotate 270", // rotate 270 to right it.
+ );
+
+ $retArr["orientation"] = $OrientTab[$this->ImageInfo[TAG_ORIENTATION]];
+ }
+
+ $retArr["color"] = ($imgInfo["IsColor"] == 0) ? "Black and white" : "Color";
+
+ if(isset($imgInfo["Process"])) {
+ switch($imgInfo["Process"]) {
+ case M_SOF0: $process = "Baseline";break;
+ case M_SOF1: $process = "Extended sequential";break;
+ case M_SOF2: $process = "Progressive";break;
+ case M_SOF3: $process = "Lossless";break;
+ case M_SOF5: $process = "Differential sequential";break;
+ case M_SOF6: $process = "Differential progressive";break;
+ case M_SOF7: $process = "Differential lossless";break;
+ case M_SOF9: $process = "Extended sequential, arithmetic coding";break;
+ case M_SOF10: $process = "Progressive, arithmetic coding";break;
+ case M_SOF11: $process = "Lossless, arithmetic coding";break;
+ case M_SOF13: $process = "Differential sequential, arithmetic coding";break;
+ case M_SOF14: $process = "Differential progressive, arithmetic coding";break;
+ case M_SOF15: $process = "Differential lossless, arithmetic coding";break;
+ default: $process = "Unknown";
+ }
+ $retArr["jpegProcess"] = $process;
+ }
+
+ if(file_exists($this->thumbnailURL)) {
+ $retArr["Thumbnail"] = "<a href='$this->thumbnailURL'>$this->thumbnailURL</a>";
+ }
+
+ return $retArr;
+ }
+
+ /**
+ * Returns time in microseconds
+ */
+ function getmicrotime(){
+ list($usec, $sec) = explode(" ",microtime());
+ return ((float)$usec + (float)$sec);
+ }
+
+ /**
+ * Get the time difference
+ */
+ function getDiffTime() {
+ return ($this->getmicrotime() - $this->timeStart);
+ }
+} // end of class
+?>
dépôts / lhc / web / wiklou.git / commitdiff