[4686] | 1 | <?php |
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| 2 | /* |
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| 3 | * --:: JPEG MetaDatas ::------------------------------------------------------- |
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| 4 | * |
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| 5 | * Author : Grum |
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| 6 | * email : grum at piwigo.org |
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| 7 | * website : http://photos.grum.fr |
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| 8 | * |
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| 9 | * << May the Little SpaceFrog be with you ! >> |
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| 10 | * |
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| 11 | * |
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| 12 | * +-----------------------------------------------------------------------+ |
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| 13 | * | JpegMetaData - a PHP based Jpeg Metadata manager | |
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| 14 | * +-----------------------------------------------------------------------+ |
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| 15 | * | Copyright(C) 2010 Grum - http://www.grum.fr | |
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| 16 | * +-----------------------------------------------------------------------+ |
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| 17 | * | This program is free software; you can redistribute it and/or modify | |
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| 18 | * | it under the terms of the GNU General Public License as published by | |
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| 19 | * | the Free Software Foundation | |
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| 20 | * | | |
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| 21 | * | This program is distributed in the hope that it will be useful, but | |
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| 22 | * | WITHOUT ANY WARRANTY; without even the implied warranty of | |
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| 23 | * | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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| 24 | * | General Public License for more details. | |
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| 25 | * | | |
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| 26 | * | You should have received a copy of the GNU General Public License | |
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| 27 | * | along with this program; if not, write to the Free Software | |
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| 28 | * | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
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| 29 | * | USA. | |
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| 30 | * +-----------------------------------------------------------------------+ |
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| 31 | * |
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| 32 | * |
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| 33 | * ----------------------------------------------------------------------------- |
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| 34 | * |
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| 35 | * The IfdReader class is the dedicated to read IFDs from a TIFF structure |
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| 36 | * |
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| 37 | * =====> See TiffReader.class.php to know more about a Tiff structure <======== |
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| 38 | * |
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| 39 | * |
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| 40 | * An IFD is formatted as this : |
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| 41 | * - number of IFD entries : 2 bytes |
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| 42 | * - entries : 12 bytes x number of entries |
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| 43 | * - next IFD offset : 4 bytes |
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| 44 | * - extra datas : number of bytes depends of the stored extra datas |
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| 45 | * |
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| 46 | * ====> See IfdEntryReader.class.php to know more about an IFD structure <===== |
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| 47 | * |
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| 48 | * ----------------------------------------------------------------------------- |
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| 49 | * |
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| 50 | * .. Notes .. |
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| 51 | * |
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| 52 | * |
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| 53 | * The Ifdreader class is derived from the GenericReader class. |
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| 54 | * |
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| 55 | * ======> See GenericReader.class.php to know more about common methods <====== |
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| 56 | * |
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| 57 | * |
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| 58 | * Derived classes : |
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| 59 | * - GpsReader (for exif GPS tags) |
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| 60 | * - MakerNotesReader (for maker notes tags) |
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| 61 | * - PentaxReader (for Pentax exif tags, in fact derived from |
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| 62 | * MakerNotesReader) |
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| 63 | * |
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| 64 | * |
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| 65 | * This class provides theses public functions : |
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| 66 | * - (static) convert |
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| 67 | * - getNextIFDOffset |
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| 68 | * |
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| 69 | * ----------------------------------------------------------------------------- |
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| 70 | */ |
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| 71 | |
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| 72 | require_once(JPEG_METADATA_DIR."Common/Data.class.php"); |
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[5038] | 73 | require_once(JPEG_METADATA_DIR."Common/GlobalTags.class.php"); |
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[4686] | 74 | require_once(JPEG_METADATA_DIR."Common/MakerNotesSignatures.class.php"); |
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| 75 | require_once(JPEG_METADATA_DIR."Readers/GenericReader.class.php"); |
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| 76 | require_once(JPEG_METADATA_DIR."Readers/IfdEntryReader.class.php"); |
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| 77 | require_once(JPEG_METADATA_DIR."TagDefinitions/IfdTags.class.php"); |
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| 78 | |
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| 79 | |
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| 80 | class IfdReader extends GenericReader |
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| 81 | { |
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| 82 | protected $byteOrder = BYTE_ORDER_LITTLE_ENDIAN; |
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[6729] | 83 | protected $schema = Schemas::EXIF; |
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[4686] | 84 | |
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[6729] | 85 | |
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[4686] | 86 | private $nextIFDOffset = 0; |
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| 87 | |
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| 88 | private $dataOffset = 0; |
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| 89 | |
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[6729] | 90 | |
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[4686] | 91 | /** |
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| 92 | * The constructor needs, like the ancestor, the datas to be parsed |
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| 93 | * |
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| 94 | * Some datas are offfset on extra data, and this offset can be (some time) |
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| 95 | * absolute inside the IFD, or relative. So, the offset of the IFD structure |
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| 96 | * is needed |
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| 97 | * |
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| 98 | * The byte order of data is the same byte order than the TIFF structure |
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| 99 | * |
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| 100 | * @param String $data |
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| 101 | * @param ULong $offset : offset of IFD block in the jpeg file |
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| 102 | * @param String $byteOrder |
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| 103 | */ |
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| 104 | function __construct($data, $offset, $byteOrder) |
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| 105 | { |
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| 106 | parent::__construct($data); |
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| 107 | |
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| 108 | $this->data->setByteOrder($byteOrder); |
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| 109 | $this->byteOrder=$byteOrder; |
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| 110 | $this->dataOffset=$offset; |
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| 111 | |
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[6722] | 112 | |
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[4705] | 113 | $this->skipHeader($this->headerSize); |
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[4686] | 114 | |
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[6722] | 115 | |
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| 116 | |
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[4686] | 117 | $dataPointer = $this->data->offset(); |
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[6722] | 118 | |
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[4686] | 119 | /* |
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| 120 | * number of entries is defined byte an UShort at the begining of the |
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| 121 | * data structure |
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| 122 | */ |
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| 123 | $this->nbEntries=$this->data->readUShort(); |
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| 124 | |
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| 125 | /* |
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| 126 | * if the file is written in little_endian, we assume the maker note |
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| 127 | * values are stored with little_endian byte order too |
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| 128 | * |
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| 129 | * in some case, software modify the exif and rewrite the file with the |
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| 130 | * big_endian byte order. but the maker note stays in little_endian |
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| 131 | * |
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| 132 | * this code try to determine the maker note byte order : if number of |
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| 133 | * entries is higher than 256, we can think that the maker note byte order |
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| 134 | * is inverted... |
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| 135 | * (the constructor for maker note is not overrided, so this trick is |
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| 136 | * placed here) |
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| 137 | * |
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| 138 | */ |
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| 139 | if($this->nbEntries>0xff) |
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| 140 | { |
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| 141 | $this->data->seek($dataPointer); |
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| 142 | if($this->byteOrder==BYTE_ORDER_BIG_ENDIAN) |
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| 143 | $this->byteOrder = BYTE_ORDER_LITTLE_ENDIAN; |
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| 144 | else |
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| 145 | $this->byteOrder = BYTE_ORDER_BIG_ENDIAN; |
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| 146 | |
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| 147 | $this->data->setByteOrder($this->byteOrder); |
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| 148 | $this->nbEntries=$this->data->readUShort(); |
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| 149 | if($this->nbEntries>0xff) |
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| 150 | { |
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| 151 | /* |
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| 152 | * if number of entries is always higher than 0xFF after reverting the |
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| 153 | * byte order, set num entries to 0 |
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| 154 | * (at now, unable to manage this) |
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| 155 | */ |
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| 156 | $this->nbEntries=0; |
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| 157 | } |
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| 158 | |
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| 159 | } |
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| 160 | |
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| 161 | $this->initializeEntries(); |
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| 162 | |
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| 163 | /* Next IFD Offset is defined after the entries */ |
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| 164 | $this->nextIFDOffset=$this->data->readULong(); |
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| 165 | } |
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| 166 | |
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[4904] | 167 | function __destruct() |
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| 168 | { |
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| 169 | parent::__destruct(); |
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| 170 | } |
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| 171 | |
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[4686] | 172 | /** |
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| 173 | * return the offset for the next IFD block |
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| 174 | * offset of next IFD is relative to the current TIFF block, not the Jpeg |
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| 175 | * file |
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| 176 | * |
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| 177 | * @return ULong |
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| 178 | */ |
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| 179 | public function getNextIFDOffset() |
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| 180 | { |
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| 181 | return($this->nextIFDOffset); |
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| 182 | } |
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| 183 | |
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| 184 | public function toString() |
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| 185 | { |
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| 186 | $returned="IFD Offset: ".sprintf("%08x", $this->dataOffset). |
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| 187 | " ; NbEntries: ".sprintf("%02d", $this->nbEntries). |
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| 188 | " ; next IFD Offset: 0x".sprintf("%08x", $this->nextIFDOffset); |
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| 189 | return($returned); |
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| 190 | } |
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| 191 | |
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| 192 | /** |
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| 193 | * initialize the definition for classic exif tags (in fact Tiff 6.0 and |
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| 194 | * Exif 2.2 tags) |
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| 195 | */ |
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| 196 | protected function initializeTagDef() |
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| 197 | { |
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| 198 | $this->tagDef = new IfdTags(); |
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| 199 | } |
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| 200 | |
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| 201 | /** |
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| 202 | * reads all the entries in the IFD block, and set the Tag properties for |
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| 203 | * the entry. |
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| 204 | * |
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| 205 | * An entry is a IfdEntryReader object |
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| 206 | * |
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| 207 | * Add the entry to the entries array |
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| 208 | * |
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| 209 | */ |
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| 210 | protected function initializeEntries() |
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| 211 | { |
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| 212 | for($i=0;$i<$this->nbEntries;$i++) |
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| 213 | { |
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| 214 | $entry=new IfdEntryReader($this->data->readASCII(12), $this->byteOrder, $this->data, $this->dataOffset, $this->tagDef); |
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| 215 | $this->setTagProperties($entry); |
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| 216 | $this->entries[]=$entry; |
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| 217 | } |
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| 218 | } |
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| 219 | |
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| 220 | /** |
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| 221 | * Interprets the tag values into a 'human readable values' |
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| 222 | * |
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| 223 | * @param IfdEntryReader $entry |
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| 224 | */ |
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| 225 | private function setTagProperties($entry) |
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| 226 | { |
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| 227 | /* |
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| 228 | * if the given tag id is defined, analyzing its values |
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| 229 | */ |
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| 230 | if($this->tagDef->tagIdExists($entry->getTagId())) |
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| 231 | { |
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| 232 | $tag=$this->tagDef->getTagById($entry->getTagId()); |
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| 233 | |
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[4698] | 234 | $entry->getTag()->setKnown(true); |
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[4686] | 235 | $entry->getTag()->setName($tag['tagName']); |
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[4698] | 236 | $entry->getTag()->setImplemented($tag['implemented']); |
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| 237 | $entry->getTag()->setTranslatable($tag['translatable']); |
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[6729] | 238 | $entry->getTag()->setSchema($this->schema); |
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[4686] | 239 | |
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| 240 | /* |
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| 241 | * if there is values defined for the tag, analyze it |
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| 242 | */ |
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| 243 | if(array_key_exists('tagValues', $tag)) |
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| 244 | { |
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| 245 | /* |
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| 246 | * if the combiTag value equals 0 exploit it as this |
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| 247 | */ |
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[4824] | 248 | if($tag['combiTag']==0 and !is_array($entry->getValue())) |
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[4686] | 249 | { |
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| 250 | if(array_key_exists($entry->getValue(), $tag['tagValues'])) |
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| 251 | { |
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| 252 | $entry->getTag()->setLabel($tag['tagValues'][$entry->getValue()]); |
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| 253 | } |
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| 254 | else |
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| 255 | { |
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| 256 | $entry->getTag()->setLabel("[unknown value 0x".sprintf("%04x", $entry->getValue())."]"); |
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| 257 | } |
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| 258 | } |
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| 259 | else |
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| 260 | { |
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| 261 | /* |
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| 262 | * the combiTag value does not equals 0, so exploit it as a combi tag |
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| 263 | */ |
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[4824] | 264 | $combiValue=$this->processCombiTag($entry->getValue(), ($tag['combiTag']==0)?1:$tag['combiTag'] ); |
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[4686] | 265 | if(array_key_exists($combiValue, $tag['tagValues'])) |
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| 266 | { |
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| 267 | $entry->getTag()->setLabel($tag['tagValues'][$combiValue]); |
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| 268 | } |
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| 269 | else |
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| 270 | { |
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| 271 | $entry->getTag()->setLabel("[unknown combi value 0x".sprintf("%0".(2*$tag['combiTag'])."x", $combiValue)."]"); |
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| 272 | } |
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| 273 | } |
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| 274 | } |
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| 275 | else |
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| 276 | { |
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| 277 | /* |
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| 278 | * there is no values defined for the tag, analyzing it with dedicated |
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| 279 | * function |
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| 280 | */ |
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| 281 | $entry->getTag()->setLabel($this->processSpecialTag($entry->getTagId(), $entry->getValue(), $entry->getType(), $entry->getExtraDataOffset())); |
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| 282 | } |
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| 283 | } |
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| 284 | } |
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| 285 | |
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| 286 | /** |
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| 287 | * Some values are obtained after combination of values |
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| 288 | */ |
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| 289 | private function processCombiTag($values, $combi) |
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| 290 | { |
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| 291 | if(is_array($values)) |
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| 292 | { |
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| 293 | $returned=0; |
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| 294 | if($combi<=count($values)) |
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| 295 | { |
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| 296 | for($i=0;$i<$combi;$i++) |
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| 297 | { |
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| 298 | $returned+=$values[$i]*pow(2,8*($combi-$i-1)); |
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| 299 | } |
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| 300 | } |
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| 301 | } |
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| 302 | else |
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| 303 | { |
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| 304 | $returned=$values; |
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| 305 | } |
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| 306 | return($returned); |
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| 307 | } |
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| 308 | |
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| 309 | /** |
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| 310 | * skip IFD header, if any |
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| 311 | * (used by maker sub IFD classes) |
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| 312 | */ |
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| 313 | protected function skipHeader($headerSize=0) |
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| 314 | { |
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| 315 | $this->data->seek($headerSize); |
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| 316 | } |
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| 317 | |
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| 318 | /** |
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| 319 | * this function do the interpretation of specials tags |
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| 320 | * must be overrided by derived classes |
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| 321 | * |
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| 322 | * the function return the interpreted value for the tag |
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| 323 | * |
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| 324 | * @param $tagId : the id of the tag |
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| 325 | * @param $values : 'raw' value to be interpreted |
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| 326 | * @param UByte $type : if needed (for IFD structure) the type of data |
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| 327 | * @param ULong $valueOffset : if needed, the offset of data in the jpeg file |
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| 328 | * @return String or Array or DateTime or Integer or Float... |
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| 329 | */ |
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| 330 | protected function processSpecialTag($tagId, $values, $type, $valuesOffset=0) |
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| 331 | { |
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| 332 | switch($tagId) |
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| 333 | { |
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| 334 | /* |
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| 335 | * Tags managed |
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| 336 | */ |
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| 337 | case 0x0100: // ImageWidth, tag 0x0100 |
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| 338 | case 0x0101: // ImageHeight, tag 0x0101 |
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| 339 | case 0x0102: // BitsPerSample, tag 0x0102 |
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| 340 | case 0x0115: // SamplesPerPixel, tag 0x0115 |
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| 341 | case 0x0116: // RowsPerStrip, tag 0x0116 |
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| 342 | case 0x0117: // StripByteCounts, tag 0x0117 |
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| 343 | case 0x0201: // JPEGInterchangeFormat, tag 0x0201 |
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| 344 | case 0x0202: // JPEGInterchangeFormatLength, tag 0x0202 |
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| 345 | case 0x8824: // SpectralSensitivity, tag 0x8824 |
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| 346 | case 0x8827: // ISOSpeedRatings, tag 0x8827 |
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| 347 | case 0xA002: // PixelXDimension, tag 0xA002 |
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| 348 | case 0xA003: // PixelYDimension, tag 0xA003 |
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| 349 | $returned=$values; |
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| 350 | break; |
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| 351 | case 0x000b: // ProcessingSoftware, tag 0x000b |
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| 352 | case 0x010D: // DocumentName, tag 0x010D |
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| 353 | case 0x010E: // ImageDescription, tag 0x010E |
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| 354 | case 0x0131: // Software, tag 0x0131 |
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| 355 | case 0x013B: // Artist, tag 0x013B |
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| 356 | case 0x8298: // Copyright, tag 0x8298 |
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| 357 | case 0x9290: // SubsecTime, tag 0x9290 |
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| 358 | case 0x9291: // SubsecTimeOriginal, tag 0x9291 |
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| 359 | case 0x9292: // SubsecTimeDigitized, tag 0x9292 |
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| 360 | case 0xA004: // RelatedSoundFile, tag 0xA004 |
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| 361 | /* |
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| 362 | * null terminated strings |
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| 363 | */ |
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| 364 | $returned=ConvertData::toStrings($values); |
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| 365 | break; |
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[4705] | 366 | case 0x010F: // Make, tag 0x010F |
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| 367 | case 0x0110: // Model, tag 0x0110 |
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| 368 | /* Make and Model are null terminated strings |
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| 369 | * memorize the maker & camera from the exif tag : it's used to |
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| 370 | * recognize the Canon camera (no header in the maker note) |
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| 371 | */ |
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| 372 | $returned=ConvertData::toStrings($values); |
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[5038] | 373 | GlobalTags::setExifMaker($returned); |
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[4705] | 374 | break; |
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[4686] | 375 | case 0x011A: // XResolution, tag 0x011A |
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| 376 | case 0x011B: // YResolution, tag 0x011B |
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| 377 | if($values[1]>0) |
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| 378 | $returned=$values[0]/$values[1]; |
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| 379 | else |
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| 380 | $returned=$values[0]; |
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| 381 | break; |
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| 382 | case 0x0132: // DateTime, tag 0x0132 |
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| 383 | case 0x9003: // DateTimeOriginal, tag 0x9003 |
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| 384 | case 0x9004: // DateTimeDigitized, tag 0x9004 |
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| 385 | /* formatted as "YYYY:MM:DD HH:MM:SS\x00" |
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| 386 | * if date is defined, returns a DateTime object |
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| 387 | * otherwise return "unknown date" |
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| 388 | */ |
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| 389 | $returned=ConvertData::toDateTime($values); |
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| 390 | break; |
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| 391 | case 0x0212: // YCbCrSubSampling, tag 0x0212 |
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| 392 | /* is a rationnal number |
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| 393 | * [1, 1] = YCbCr4:4:4 |
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| 394 | * [1, 2] = YCbCr4:4:0 |
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| 395 | * [1, 4] = YCbCr4:4:1 |
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| 396 | * [2, 1] = YCbCr4:2:2 |
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| 397 | * [2, 2] = YCbCr4:2:0 |
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| 398 | * [2, 4] = YCbCr4:2:1 |
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| 399 | * [4, 1] = YCbCr4:1:1 |
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| 400 | * [4, 2] = YCbCr4:1:0 |
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| 401 | */ |
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| 402 | $tag=$this->tagDef->getTagById(0x0212); |
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| 403 | if(array_key_exists($values[0], $tags['tagValues.special'])) |
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| 404 | { |
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| 405 | if(array_key_exists($values[1], $tags['tagValues.special'][$values[0]])) |
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| 406 | { |
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| 407 | $returned=$tags['tagValues.special'][$values[0]][$values[1]]; |
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| 408 | } |
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| 409 | else |
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| 410 | { |
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[5222] | 411 | $returned="Unknown"; |
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[4686] | 412 | } |
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| 413 | } |
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| 414 | else |
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| 415 | { |
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[5222] | 416 | $returned="Unknown"; |
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[4686] | 417 | } |
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| 418 | break; |
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| 419 | case 0x829A: // ExposureTime, tag 0x829A |
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| 420 | if($values[1]==0) $values[1]=1; |
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| 421 | $returned=ConvertData::toExposureTime($values[0]/$values[1]); |
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| 422 | break; |
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| 423 | case 0x829D: // FNumber, tag 0x829D |
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| 424 | if($values[1]==0) $values[1]=1; |
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[5038] | 425 | $returned=ConvertData::toFNumber(GlobalTags::setExifAperture($values[0]/$values[1])); |
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[4686] | 426 | break; |
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| 427 | case 0x8769: // Exif IFD Pointer, tag 0x8769 |
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| 428 | /* |
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| 429 | * the tag 0x8769 value is an offset to an EXIF sub IFD |
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| 430 | * the returned value is a parsed sub IFD |
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| 431 | */ |
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[6722] | 432 | if($values>$this->dataOffset) |
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| 433 | { |
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| 434 | $returned=new IfdReader($this->data->readASCII(-1,$values-$this->dataOffset), $values, $this->byteOrder); |
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| 435 | } |
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| 436 | else |
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| 437 | { |
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| 438 | /* ELSE implemented with the mantis bug:1686 |
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| 439 | * when the offset of a sub IFD tag is lower than the offset of the |
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| 440 | * current IFD, ignore the sub IFD |
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| 441 | * |
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| 442 | * A method have to be coded to manage this kind of sub IFD |
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| 443 | */ |
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| 444 | $returned="Feature not implemented: read negative offset"; |
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| 445 | } |
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[4686] | 446 | break; |
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| 447 | case 0x8825: // GPS IFD Pointer, tag 0x8825 |
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| 448 | /* |
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| 449 | * the tag 0x8825 value is an offset to an EXIF sub IFD |
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| 450 | * the returned value is a parsed sub IFD |
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| 451 | */ |
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| 452 | require_once(JPEG_METADATA_DIR."Readers/GpsReader.class.php"); |
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| 453 | $returned=new GpsReader($this->data->readASCII(-1,$values-$this->dataOffset), $values, $this->byteOrder); |
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| 454 | break; |
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| 455 | case 0x9000: // ExifVersion, tag 0x9000 |
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| 456 | case 0xA000: // FlashpixVersion, tag 0xa0000 |
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| 457 | $returned=(int)substr($values,0,2).".".(int)substr($values,2); |
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| 458 | break; |
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| 459 | case 0x9101: // ComponentsConfiguration, tag0x9101 |
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| 460 | switch($values) |
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| 461 | { |
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| 462 | case "\x01\x02\x03\x00": |
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| 463 | $returned="YCbCr"; |
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| 464 | break; |
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| 465 | case "\x04\x05\x06\x00": |
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| 466 | $returned="RGB"; |
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| 467 | break; |
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| 468 | default: |
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[5222] | 469 | $returned="Unknown"; |
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[4686] | 470 | break; |
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| 471 | } |
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| 472 | break; |
---|
| 473 | case 0x9102: // CompressedBitsPerPixel, tag0x9102 |
---|
| 474 | case 0x9203: // BrightnessValue, tag 0x9203 (APEX format) |
---|
| 475 | if($values[1]==0) $values[1]=1; |
---|
| 476 | $returned=round($values[0]/$values[1],4); |
---|
| 477 | break; |
---|
| 478 | case 0x9201: // ShutterSpeedValue, tag0x9201 |
---|
| 479 | if($values[1]==0) $values[1]=1; |
---|
[4825] | 480 | /* |
---|
| 481 | * the formula to compute the shutter speed value is 1/pow(2, x) |
---|
| 482 | * |
---|
| 483 | * Because of rounding errors, the result obtained using this formula |
---|
| 484 | * is sometimes incorrect. |
---|
| 485 | * |
---|
| 486 | * We consider that if the result is greater than the second, the |
---|
| 487 | * result is rounded to 2 hundredths of a second (to avoid something |
---|
| 488 | * like 3.0000124500015s) |
---|
| 489 | * |
---|
| 490 | * in other case (result is less than 1 second) there is no rules |
---|
| 491 | * result can be strange, but for now I don't know how to resolve this |
---|
| 492 | * problem |
---|
| 493 | * |
---|
| 494 | */ |
---|
| 495 | |
---|
| 496 | $value=1/pow(2, $values[0]/$values[1]); |
---|
| 497 | if($value>1) |
---|
| 498 | { |
---|
| 499 | $value=round($value,2); |
---|
| 500 | } |
---|
| 501 | $returned=ConvertData::toExposureTime($value); |
---|
[4686] | 502 | break; |
---|
| 503 | case 0x9202: // ApertureValue, tag0x9202 |
---|
[5038] | 504 | if($values[1]==0) $values[1]=1; |
---|
| 505 | if(GlobalTags::getExifAperture()=="") |
---|
| 506 | { |
---|
| 507 | // set only if empty (if not empty, it means the value was already |
---|
| 508 | // set with the FNumber tag) |
---|
| 509 | GlobalTags::setExifAperture(pow(1.414213562, $values[0]/$values[1])); |
---|
| 510 | } |
---|
| 511 | //no break, $returned value is the same than the 0x9205 tag |
---|
[4686] | 512 | case 0x9205: // MaxApertureValue, tag0x9205 |
---|
| 513 | if($values[1]==0) $values[1]=1; |
---|
| 514 | $returned=ConvertData::toFNumber(pow(1.414213562, $values[0]/$values[1])); |
---|
| 515 | break; |
---|
| 516 | case 0x9204: // ExposureBiasValue, tag0x9204 |
---|
| 517 | if($values[1]==0) $values[1]=1; |
---|
| 518 | $returned=ConvertData::toEV($values[0]/$values[1]); |
---|
| 519 | break; |
---|
| 520 | case 0x9206: // SubjectDistance, tag 0x9206 |
---|
| 521 | if($values[1]==0) $values[1]=1; |
---|
| 522 | $returned=ConvertData::toDistance($values[0]/$values[1], "m"); |
---|
| 523 | break; |
---|
| 524 | case 0x9209: // flash, tag 0x9209 |
---|
| 525 | $tag=$this->tagDef->getTagById(0x9209); |
---|
| 526 | $returned=Array( |
---|
| 527 | "computed" => (isset($tag['tagValues.computed'][$values])?$tag['tagValues.computed'][$values]:"unknown"), |
---|
[4998] | 528 | "detail" => Array() |
---|
| 529 | ); |
---|
| 530 | |
---|
| 531 | $value=$values & 0x0001; |
---|
| 532 | $returned["detail"][]=$tag['tagValues.specialValues'][0x0001][$value]; |
---|
| 533 | |
---|
| 534 | $value=($values & 0x0006)>>1; |
---|
| 535 | $returned["detail"][]=$tag['tagValues.specialValues'][0x0006][$value]; |
---|
| 536 | |
---|
| 537 | $value=($values & 0x0018)>>3; |
---|
| 538 | $returned["detail"][]=$tag['tagValues.specialValues'][0x0018][$value]; |
---|
| 539 | |
---|
| 540 | $value=($values & 0x0020)>>5; |
---|
| 541 | $returned["detail"][]=$tag['tagValues.specialValues'][0x0020][$value]; |
---|
| 542 | |
---|
| 543 | $value=($values & 0x0040)>>6; |
---|
| 544 | $returned["detail"][]=$tag['tagValues.specialValues'][0x0040][$value]; |
---|
| 545 | |
---|
[4686] | 546 | break; |
---|
| 547 | case 0x920A: // FocalLength, tag 0x920A |
---|
| 548 | if($values[1]==0) $values[1]=1; |
---|
[5038] | 549 | $returned=ConvertData::toFocalLength(GlobalTags::setExifFocal($values[0]/$values[1])); |
---|
[4686] | 550 | break; |
---|
| 551 | case 0x927c: // MakerNote, tag 0x927c |
---|
| 552 | /* try to return a specific maker sub ifd |
---|
| 553 | * |
---|
| 554 | * if $values is n |
---|
| 555 | */ |
---|
| 556 | $makerSignature=MakerNotesSignatures::getMaker($values); |
---|
| 557 | switch($makerSignature) |
---|
| 558 | { |
---|
| 559 | case MakerNotesSignatures::OlympusHeader: |
---|
| 560 | case MakerNotesSignatures::Olympus2Header: |
---|
[4705] | 561 | $returned="Olympus is not implemented yet"; |
---|
[4686] | 562 | break; |
---|
| 563 | case MakerNotesSignatures::FujiFilmHeader: |
---|
[4705] | 564 | $returned="FujiFilm is not implemented yet"; |
---|
[4686] | 565 | break; |
---|
| 566 | case MakerNotesSignatures::Nikon2Header: |
---|
| 567 | case MakerNotesSignatures::Nikon3Header: |
---|
[4705] | 568 | require_once(JPEG_METADATA_DIR."Readers/NikonReader.class.php"); |
---|
| 569 | $returned=new NikonReader($values, $valuesOffset, $this->byteOrder, $makerSignature); |
---|
[4686] | 570 | break; |
---|
| 571 | case MakerNotesSignatures::PanasonicHeader: |
---|
[4705] | 572 | $returned="Panasonic is not implemented yet"; |
---|
[4686] | 573 | break; |
---|
| 574 | case MakerNotesSignatures::PentaxHeader: |
---|
| 575 | case MakerNotesSignatures::Pentax2Header: |
---|
| 576 | require_once(JPEG_METADATA_DIR."Readers/PentaxReader.class.php"); |
---|
| 577 | $returned=new PentaxReader($values, $valuesOffset, $this->byteOrder, $makerSignature); |
---|
| 578 | break; |
---|
| 579 | case MakerNotesSignatures::SigmaHeader: |
---|
| 580 | case MakerNotesSignatures::Sigma2Header: |
---|
[4705] | 581 | $returned="Sigma is not implemented yet"; |
---|
[4686] | 582 | break; |
---|
| 583 | case MakerNotesSignatures::SonyHeader: |
---|
[4705] | 584 | $returned="Sony is not implemented yet"; |
---|
[4686] | 585 | break; |
---|
| 586 | default: |
---|
[4705] | 587 | /* |
---|
| 588 | * Canon maker notes don't have any header |
---|
| 589 | * So, the only method to know if the maker note is from a Canon |
---|
| 590 | * camera is looking the exif maker value equals "Canon" or |
---|
| 591 | * the camera model contains "Canon" |
---|
| 592 | */ |
---|
[5038] | 593 | if(preg_match("/.*canon.*/i",GlobalTags::getExifMaker())) |
---|
[4705] | 594 | { |
---|
| 595 | require_once(JPEG_METADATA_DIR."Readers/CanonReader.class.php"); |
---|
| 596 | $returned=new CanonReader($values, $valuesOffset, $this->byteOrder, ""); |
---|
| 597 | } |
---|
| 598 | else |
---|
| 599 | { |
---|
| 600 | $returned="unknown maker => ".ConvertData::toHexDump($values, $type, 16); |
---|
| 601 | } |
---|
[4686] | 602 | break; |
---|
| 603 | } |
---|
| 604 | break; |
---|
| 605 | case 0x9286: // UserComment, tag 0x9286 |
---|
| 606 | /* |
---|
| 607 | * user comment format : |
---|
| 608 | * first 8 bytes : format type |
---|
| 609 | * other bytes : text |
---|
| 610 | */ |
---|
| 611 | $returned=substr($values,8); |
---|
| 612 | break; |
---|
| 613 | case 0xA20B: // FlashEnergy, tag 0xA20B |
---|
| 614 | case 0xA20E: // FocalPlaneXResolution, tag 0xA20E |
---|
| 615 | case 0xA20F: // FocalPlaneYResolution, tag 0xA20F |
---|
| 616 | case 0xA215: // ExposureIndex, tag 0xA20F |
---|
| 617 | case 0xA404: // DigitalZoomRatio, tag 0xA404 |
---|
| 618 | if($values[1]==0) $values[1]=1; |
---|
| 619 | $returned=round($values[0]/$values[1],2); |
---|
| 620 | break; |
---|
| 621 | case 0xA405: // FocalLengthIn35mmFilm, tag 0xA405 |
---|
| 622 | $returned=ConvertData::toFocalLength($values); |
---|
| 623 | break; |
---|
| 624 | /* |
---|
| 625 | * Tags not managed |
---|
| 626 | */ |
---|
| 627 | case 0x0111: // StripOffsets, tag 0x0111 |
---|
| 628 | case 0x012D: // TransferFunction, tag 0x012D |
---|
| 629 | case 0x013E: // WhitePoint, tag 0x013E |
---|
| 630 | case 0x013F: // PrimaryChromaticities, tag 0x013F |
---|
| 631 | case 0x0211: // YCbCrCoefficients, tag 0x0211 |
---|
| 632 | case 0x0214: // ReferenceBlackWhite, tag 0x0214 |
---|
| 633 | case 0x8828: // ReferenceBlackWhite, tag 0x0214 |
---|
| 634 | case 0x9214: // SubjectArea, tag 0x9214 |
---|
| 635 | case 0xA20C: // SpatialFrequencyResponse, tag 0xA20C |
---|
| 636 | case 0xA40B: // DeviceSettingDescription, tag 0xA40B |
---|
| 637 | default: |
---|
| 638 | $returned="Not yet implemented;".ConvertData::toHexDump($tagId, ByteType::USHORT)." => ".ConvertData::toHexDump($values, $type, 64); |
---|
| 639 | break; |
---|
| 640 | } |
---|
| 641 | return($returned); |
---|
| 642 | } |
---|
| 643 | } |
---|
| 644 | |
---|
| 645 | |
---|
| 646 | ?> |
---|