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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73 | require_once(JPEG_METADATA_DIR."Common/GlobalTags.class.php"); |
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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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83 | protected $schema = Schemas::EXIF; |
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84 | |
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85 | |
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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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90 | |
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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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112 | |
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113 | $this->skipHeader($this->headerSize); |
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114 | |
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115 | |
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116 | |
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117 | $dataPointer = $this->data->offset(); |
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118 | |
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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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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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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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234 | $entry->getTag()->setKnown(true); |
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235 | $entry->getTag()->setName($tag['tagName']); |
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236 | $entry->getTag()->setImplemented($tag['implemented']); |
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237 | $entry->getTag()->setTranslatable($tag['translatable']); |
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238 | $entry->getTag()->setSchema($this->schema); |
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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', $tag)) |
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244 | { |
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245 | /* |
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246 | * if the combiTag value equals 0 exploit it as this |
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247 | */ |
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248 | if($tag['combiTag']==0 and !is_array($entry->getValue())) |
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249 | { |
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250 | if(array_key_exists($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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264 | $combiValue=$this->processCombiTag($entry->getValue(), ($tag['combiTag']==0)?1:$tag['combiTag'] ); |
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265 | if(array_key_exists($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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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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373 | GlobalTags::setExifMaker($returned); |
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374 | break; |
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375 | case 0x011A: // XResolution, tag 0x011A |
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376 | case 0x011B: // YResolution, tag 0x011B |
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377 | if($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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411 | $returned="Unknown"; |
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412 | } |
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413 | } |
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414 | else |
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415 | { |
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416 | $returned="Unknown"; |
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417 | } |
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418 | break; |
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419 | case 0x829A: // ExposureTime, tag 0x829A |
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420 | if($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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425 | $returned=ConvertData::toFNumber(GlobalTags::setExifAperture($values[0]/$values[1])); |
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426 | break; |
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427 | case 0x8769: // Exif IFD Pointer, tag 0x8769 |
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428 | /* |
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429 | * the tag 0x8769 value is an offset to an EXIF sub IFD |
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430 | * the returned value is a parsed sub IFD |
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431 | */ |
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432 | if($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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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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469 | $returned="Unknown"; |
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470 | break; |
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471 | } |
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472 | break; |
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473 | case 0x9102: // CompressedBitsPerPixel, tag0x9102 |
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474 | case 0x9203: // BrightnessValue, tag 0x9203 (APEX format) |
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475 | if($values[1]==0) $values[1]=1; |
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476 | $returned=round($values[0]/$values[1],4); |
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477 | break; |
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478 | case 0x9201: // ShutterSpeedValue, tag0x9201 |
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479 | if($values[1]==0) $values[1]=1; |
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480 | /* |
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481 | * the formula to compute the shutter speed value is 1/pow(2, x) |
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482 | * |
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483 | * Because of rounding errors, the result obtained using this formula |
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484 | * is sometimes incorrect. |
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485 | * |
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486 | * We consider that if the result is greater than the second, the |
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487 | * result is rounded to 2 hundredths of a second (to avoid something |
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488 | * like 3.0000124500015s) |
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489 | * |
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490 | * in other case (result is less than 1 second) there is no rules |
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491 | * result can be strange, but for now I don't know how to resolve this |
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492 | * problem |
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493 | * |
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494 | */ |
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495 | |
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496 | $value=($values[0]<=0)?0:1/pow(2, $values[0]/$values[1]); |
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497 | if($value>1) |
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498 | { |
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499 | $value=round($value,2); |
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500 | } |
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501 | $returned=ConvertData::toExposureTime($value); |
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502 | break; |
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503 | case 0x9202: // ApertureValue, tag0x9202 |
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504 | if($values[1]==0) $values[1]=1; |
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505 | if(GlobalTags::getExifAperture()=="") |
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506 | { |
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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, $returned value is the same than the 0x9205 tag |
---|
512 | case 0x9205: // MaxApertureValue, tag0x9205 |
---|
513 | if($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"), |
---|
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][$value]; |
---|
545 | |
---|
546 | break; |
---|
547 | case 0x920A: // FocalLength, tag 0x920A |
---|
548 | if($values[1]==0) $values[1]=1; |
---|
549 | $returned=ConvertData::toFocalLength(GlobalTags::setExifFocal($values[0]/$values[1])); |
---|
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: |
---|
561 | $returned="Olympus is not implemented yet"; |
---|
562 | break; |
---|
563 | case MakerNotesSignatures::FujiFilmHeader: |
---|
564 | $returned="FujiFilm is not implemented yet"; |
---|
565 | break; |
---|
566 | case MakerNotesSignatures::Nikon2Header: |
---|
567 | case MakerNotesSignatures::Nikon3Header: |
---|
568 | require_once(JPEG_METADATA_DIR."Readers/NikonReader.class.php"); |
---|
569 | $returned=new NikonReader($values, $valuesOffset, $this->byteOrder, $makerSignature); |
---|
570 | break; |
---|
571 | case MakerNotesSignatures::PanasonicHeader: |
---|
572 | $returned="Panasonic is not implemented yet"; |
---|
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: |
---|
581 | $returned="Sigma is not implemented yet"; |
---|
582 | break; |
---|
583 | case MakerNotesSignatures::SonyHeader: |
---|
584 | $returned="Sony is not implemented yet"; |
---|
585 | break; |
---|
586 | default: |
---|
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 | */ |
---|
593 | if(preg_match("/.*canon.*/i",GlobalTags::getExifMaker())) |
---|
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 | } |
---|
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 | ?> |
---|