1 exifread.h |
1 /* |
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2 * Copyright (c) 2003, 2004 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.symbianfoundation.org/legal/licencesv10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: Exif file format parser ( reader ) class |
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15 * |
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16 */ |
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17 |
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18 |
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19 #ifndef EXIFREAD_H |
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20 #define EXIFREAD_H |
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21 |
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22 // INCLUDES |
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23 #include <e32base.h> |
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24 |
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25 // CONSTANTS |
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26 |
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27 // MACROS |
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28 |
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29 // DATA TYPES |
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30 enum TExifIfdType |
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31 { |
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32 EIfd0 = 0, |
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33 EIfdExif, |
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34 EIfd1, |
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35 EIfdGps, |
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36 EIfdIntOp |
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37 }; |
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38 |
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39 |
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40 // FUNCTION PROTOTYPES |
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41 |
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42 // FORWARD DECLARATIONS |
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43 class CExifTag; |
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44 |
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45 // CLASS DECLARATION |
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46 |
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47 /** |
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48 * CExifRead |
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49 * Interface class for parsing Exif v2.2 file format. An instance of this class |
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50 * can be instantiated providing valid Exif data. |
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51 * |
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52 * @lib ExifLib |
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53 * @since 2.6 |
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54 */ |
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55 NONSHARABLE_CLASS( CExifRead ): public CBase |
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56 { |
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57 |
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58 public: // Enumerations |
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59 enum TExifReadOption |
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60 { |
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61 ENoOptions = 0x0000, // Original, safe full parsing |
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62 ENoJpeg = 0x0001, // No main JPEG included, no parsing for main image |
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63 EFastJpegParsing = 0x0002, // Fast JPEG marker parsing |
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64 ENoTagChecking = 0x0004 // Ignore unknown EXIF tags and mandatory tag checking |
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65 }; |
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66 |
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67 public: // Constructors and destructor |
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68 |
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69 /** |
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70 * Two-phased constructor. |
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71 */ |
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72 IMPORT_C static CExifRead* NewL( const TDesC8& aExifData ); |
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73 |
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74 IMPORT_C static CExifRead* NewL( const TDesC8& aExifData, TUint aExifReadOption ); |
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75 |
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76 /** |
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77 * Destructor. |
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78 */ |
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79 virtual ~CExifRead(); |
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80 |
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81 public: // New functions |
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82 |
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83 /** |
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84 * Returns the Tag instance, which has the specified ID from the |
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85 * requested IFD. |
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86 * @since 2.6 |
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87 * @param aIfdType The hosting IFD type |
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88 * @param aTagId The queried tag ID. |
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89 * @return Unmodifiable tag instance returned. |
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90 */ |
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91 virtual const CExifTag* GetTagL( |
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92 TExifIfdType aIfdType, |
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93 TUint16 aTagId ) const = 0; |
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94 |
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95 /** |
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96 * Returns the IDs of all the tags that are stored in the Exif data. |
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97 * @since 2.6 |
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98 * @param aIfdType The hosting IFD type. |
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99 * @param aNoTags Number of tag IDs returned. |
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100 * @return Pointer to the tag IDs. |
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101 */ |
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102 virtual TUint16* GetTagIdsL( |
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103 TExifIfdType aIfdType, |
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104 TInt& aNoTags ) const = 0; |
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105 |
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106 /** |
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107 * Returns the types of the IFDs stored in the Exif data. |
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108 * @since 2.6 |
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109 * @param aNoIfd Number of IFD types returned. |
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110 * @return Pointer to the IFD types. |
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111 */ |
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112 virtual TExifIfdType* GetIfdTypesL( TInt& aNoIfd ) const = 0; |
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113 |
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114 /** |
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115 * Returns pointer to a copy of the thumbnail image data. |
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116 * @since 2.6 |
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117 * @return Pointer to the descriptor containing a copy of the |
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118 * Exif thumbnail image. |
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119 */ |
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120 virtual HBufC8* GetThumbnailL() const = 0; |
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121 |
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122 /** |
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123 * Returns a boolean stating if the queried IFD structure exists in the |
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124 * Exif data. |
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125 * @since 2.6 |
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126 * @param aIfdType The queried IFD type. |
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127 * @return Boolean stating if the specified IFD exists or not. |
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128 */ |
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129 virtual TBool IfdExists( TExifIfdType aIfdType ) const = 0; |
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130 |
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131 /** |
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132 * Returns a boolean stating if the queried tag exists in the specified |
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133 * IFD structure. |
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134 * @since 2.6 |
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135 * @param aTagId Queried tag ID. |
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136 * @param aIfdType The hosting IFD type. |
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137 * @return Boolean stating if the specified tag exists or not. |
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138 */ |
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139 virtual TBool TagExists( |
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140 TUint16 aTagId, |
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141 TExifIfdType aIfdType ) const = 0; |
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142 |
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143 /** |
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144 * Gets the Image Description tag data. |
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145 * @since 2.6 |
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146 * @return Pointer to the descriptor containing copy of the Image |
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147 * Description data. |
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148 */ |
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149 virtual HBufC8* GetImageDescriptionL() const = 0; |
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150 |
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151 /** |
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152 * Gets the Make tag data. |
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153 * @since 2.6 |
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154 * @return Pointer to the descriptor containing copy of the Make data. |
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155 */ |
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156 virtual HBufC8* GetMakeL() const = 0; |
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157 |
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158 /** |
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159 * Gets the Model tag data. |
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160 * @since 2.6 |
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161 * @return Pointer to the descriptor containing copy of the Model data. |
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162 */ |
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163 virtual HBufC8* GetModelL() const = 0; |
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164 |
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165 /** |
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166 * Gets the Transfer Function tag data. |
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167 * @since 2.6 |
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168 * @return Pointer to the descriptor containing copy of the Transfer |
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169 * Function data. |
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170 */ |
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171 virtual HBufC8* GetTransferFunctionL() const = 0; |
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172 |
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173 /** |
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174 * Gets the Date Time tag data. |
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175 * @since 2.6 |
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176 * @return Pointer to the descriptor containing copy of the Date Time |
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177 * data. |
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178 */ |
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179 virtual HBufC8* GetDateTimeL() const = 0; |
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180 |
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181 /** |
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182 * Gets the Software tag data. |
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183 * @since 2.6 |
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184 * @return Pointer to the descriptor containing copy of the Software |
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185 * data. |
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186 */ |
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187 virtual HBufC8* GetSoftwareL() const = 0; |
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188 |
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189 /** |
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190 * Gets the Copyright tag data. |
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191 * @since 2.6 |
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192 * @return Pointer to the descriptor containing copy of the Copyright |
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193 * data. |
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194 */ |
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195 virtual HBufC8* GetCopyrightL() const = 0; |
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196 |
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197 /** |
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198 * Gets the Orientation tag data. |
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199 * @since 2.6 |
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200 * @param aOrientation Returned Orientation data. |
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201 * @return Error code. |
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202 */ |
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203 virtual TInt GetOrientation( TUint16& aOrientation ) const = 0; |
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204 |
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205 /** |
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206 * Gets the X Resolution tag data. |
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207 * @since 2.6 |
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208 * @param aXResolution1 Returned X Resolution numerator. |
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209 * @param aXResolution2 Returned X Resolution denominator. |
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210 * @return Error code. |
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211 */ |
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212 virtual TInt GetXResolution( |
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213 TUint32& aXResolution1, |
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214 TUint32& aXResolution2 ) const = 0; |
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215 |
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216 /** |
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217 * Gets the Y Resolution tag data. |
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218 * @since 2.6 |
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219 * @param aYResolution1 Returned Y Resolution numerator. |
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220 * @param aYResolution2 Returned Y Resolution denominator. |
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221 * @return Error code. |
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222 */ |
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223 virtual TInt GetYResolution( |
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224 TUint32& aYResolution1, |
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225 TUint32& aYResolution2 ) const = 0; |
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226 |
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227 /** |
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228 * Gets the Resolution Unit tag data. |
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229 * @since 2.6 |
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230 * @param aResolutionUnit Returned Resolution Unit data. |
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231 * @return Error code. |
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232 */ |
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233 virtual TInt GetResolutionUnit( TUint16& aResolutionUnit ) const = 0; |
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234 |
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235 /** |
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236 * Gets the YCbCr Positioning tag data. |
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237 * @since 2.6 |
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238 * @param aYCbCrPositioning Returned YCbCr Positioning data. |
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239 * @return Error code. |
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240 */ |
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241 virtual TInt GetYCbCrPositioning( |
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242 TUint16& aYCbCrPositioning ) const = 0; |
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243 |
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244 /** |
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245 * Gets the Exif Ifd Pointer tag data. |
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246 * @since 2.6 |
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247 * @param aExifIfdPointer Returned Exif Ifd Pointer data. |
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248 * @return Error code. |
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249 */ |
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250 virtual TInt GetExifIfdPointer( TUint32& aExifIfdPointer ) const = 0; |
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251 |
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252 /** |
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253 * Gets the Gps Info Ifd Pointer tag data. |
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254 * @since 2.6 |
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255 * @param aGpsInfoIfdPointer Returned Gps Info Ifd Pointer data. |
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256 * @return Error code. |
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257 */ |
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258 virtual TInt GetGpsInfoIfdPointer( |
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259 TUint32& aGpsInfoIfdPointer ) const = 0; |
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260 |
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261 /** |
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262 * Gets the Iso Speed Ratings tag data. |
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263 * @since 2.6 |
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264 * @return Pointer to the descriptor containing copy of the Iso Speed |
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265 * Ratings data. |
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266 */ |
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267 virtual HBufC8* GetIsoSpeedRatingsL() const = 0; |
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268 |
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269 /** |
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270 * Gets the Date Time Original tag data. |
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271 * @since 2.6 |
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272 * @return Pointer to the descriptor containing copy of the Date Time |
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273 * Original data. |
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274 */ |
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275 virtual HBufC8* GetDateTimeOriginalL() const = 0; |
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276 |
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277 /** |
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278 * Gets the Date Time Digitized tag data. |
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279 * @since 2.6 |
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280 * @return Pointer to the descriptor containing copy of the Date Time |
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281 * Digitized data. |
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282 */ |
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283 virtual HBufC8* GetDateTimeDigitizedL() const = 0; |
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284 |
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285 /** |
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286 * Gets the Maker Note tag data. |
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287 * @since 2.6 |
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288 * @return Pointer to the descriptor containing copy of the Maker Note |
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289 * data. |
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290 */ |
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291 virtual HBufC8* GetMakerNoteL() const = 0; |
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292 |
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293 /** |
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294 * Gets the User Comment tag data. |
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295 * @since 2.6 |
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296 * @return Pointer to the descriptor containing copy of the User |
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297 * Comment data. |
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298 */ |
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299 virtual HBufC8* GetUserCommentL() const = 0; |
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300 |
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301 /** |
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302 * Gets the Related Sound File tag data. |
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303 * @since 2.6 |
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304 * @return Pointer to the descriptor containing copy of the Related |
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305 * Sound File data. |
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306 */ |
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307 virtual HBufC8* GetRelatedSoundFileL() const = 0; |
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308 |
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309 /** |
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310 * Gets the Exposure Time tag data. |
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311 * @since 2.6 |
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312 * @param ExposureTime Returned Exposure Time data. |
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313 * @return Error code. |
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314 */ |
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315 virtual TInt GetExposureTime( |
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316 TUint32& aExposureTime1, |
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317 TUint32& aExposureTime2 ) const = 0; |
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318 |
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319 /** |
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320 * Gets the Components Configuration tag data. |
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321 * @since 2.6 |
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322 * @param aComponentsConfiguration Returned Components Configuration |
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323 * data. |
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324 * @return Error code. |
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325 */ |
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326 virtual TInt GetComponentsConfiguration( |
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327 TUint8& aFirstComponent, TUint8& aSecondComponent, |
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328 TUint8& aThirdComponent, TUint8& aFourthComponent) const = 0; |
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329 |
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330 /** |
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331 * Gets the Flash tag data. |
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332 * @since 2.6 |
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333 * @param aFlash Returned Flash data. |
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334 * @return Error code. |
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335 */ |
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336 virtual TInt GetFlash( TUint16& aFlash ) const = 0; |
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337 |
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338 /** |
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339 * Gets the ColorSpace tag data. |
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340 * @since 2.6 |
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341 * @param aColorSpace Returned ColorSpace data. |
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342 * @return Error code. |
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343 */ |
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344 virtual TInt GetColorSpace( TUint16& aColorSpace ) const = 0; |
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345 |
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346 /** |
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347 * Gets the Pixel X Dimension tag data. |
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348 * @since 2.6 |
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349 * @param aPixelXDimension Returned Pixel X Dimension data. |
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350 * @return Error code. |
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351 */ |
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352 virtual TInt GetPixelXDimension( TUint32& aPixelXDimension ) const = 0; |
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353 |
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354 /** |
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355 * Gets the Pixel Y Dimension tag data. |
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356 * @since 2.6 |
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357 * @param aPixelYDimension Returned Pixel Y Dimension data. |
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358 * @return Error code. |
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359 */ |
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360 virtual TInt GetPixelYDimension( TUint32& aPixelYDimension ) const = 0; |
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361 |
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362 /** |
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363 * Gets the Exposure Mode tag data. |
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364 * @since 2.6 |
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365 * @param aExposureMode Returned Exposure Mode data. |
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366 * @return Error code. |
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367 */ |
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368 virtual TInt GetExposureMode( TUint16& aExposureMode ) const = 0; |
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369 |
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370 /** |
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371 * Gets the White Balance tag data. |
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372 * @since 2.6 |
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373 * @param aWhiteBalance Returned White Balance data. |
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374 * @return Error code. |
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375 */ |
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376 virtual TInt GetWhiteBalance( TUint16& aWhiteBalance ) const = 0; |
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377 |
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378 /** |
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379 * Gets the Scene Capture Type tag data. |
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380 * @since 2.6 |
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381 * @param aSceneCaptureType Returned Scene Capture Type data. |
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382 * @return Error code. |
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383 */ |
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384 virtual TInt GetSceneCaptureType( |
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385 TUint16& aSceneCaptureType ) const = 0; |
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386 |
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387 /** |
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388 * Gets the Exposure Program tag data. |
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389 * @since 2.6 |
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390 * @param aExposureProgram Returned Exposure Program data. |
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391 * @return Error code. |
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392 */ |
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393 virtual TInt GetExposureProgram( TUint16& aExposureProgram ) const = 0; |
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394 |
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395 /** |
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396 * Gets the Aperture Value tag data. |
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397 * @since 2.6 |
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398 * @param aApertureValue1 Returned Aperture Value numerator. |
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399 * @param aApertureValue2 Returned Aperture Value denominator. |
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400 * @return Error code. |
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401 */ |
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402 virtual TInt GetApertureValue( |
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403 TUint32& aApertureValue1, |
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404 TUint32& aApertureValue2 ) const = 0; |
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405 |
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406 /** |
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407 * Gets the Exposure Bias Value tag data. |
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408 * @since 2.6 |
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409 * @param aExposureBiasValue1 Returned Exposure Bias Value numerator. |
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410 * @param aExposureBiasValue1 Returned Exposure Bias Value denominator. |
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411 * @return Error code. |
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412 */ |
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413 virtual TInt GetExposureBiasValue( |
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414 TInt32& aExposureBiasValue1, |
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415 TInt32& aExposureBiasValue2 ) const = 0; |
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416 |
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417 /** |
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418 * Gets the Metering Mode tag data. |
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419 * @since 2.6 |
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420 * @param aMeteringMode Returned Metering Mode data. |
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421 * @return Error code. |
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422 */ |
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423 virtual TInt GetMeteringMode( TUint16& aMeteringMode ) const = 0; |
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424 |
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425 /** |
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426 * Gets the Light Source tag data. |
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427 * @since 2.6 |
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428 * @param aLightSource Returned Light Source data. |
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429 * @return Error code. |
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430 */ |
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431 virtual TInt GetLightSource( TUint16& aLightSource ) const = 0; |
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432 |
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433 /** |
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434 * Gets the File Source tag data. |
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435 * @since 2.6 |
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436 * @param aFileSource Returned File Source data. |
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437 * @return Error code. |
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438 */ |
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439 virtual TInt GetFileSource( TInt8& aFileSource ) const = 0; |
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440 |
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441 /** |
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442 * Gets the Digital Zoom Ratio tag data. |
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443 * @since 2.6 |
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444 * @param aDigitalZoomRatio1 Returned Digital Zoom Ratio numerator. |
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445 * @param aDigitalZoomRatio2 Returned Digital Zoom Ratio denominator. |
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446 * @return Error code. |
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447 */ |
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448 virtual TInt GetDigitalZoomRatio( |
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449 TUint32& aDigitalZoomRatio1, |
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450 TUint32& aDigitalZoomRatio2 ) const = 0; |
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451 |
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452 /** |
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453 * Gets the Contrast tag data. |
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454 * @since 2.6 |
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455 * @param aContrast Returned Contrast data. |
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456 * @return Error code. |
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457 */ |
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458 virtual TInt GetContrast( TUint16& aContrast ) const = 0; |
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459 |
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460 /** |
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461 * Gets the Saturation tag data. |
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462 * @since 2.6 |
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463 * @param aSaturation Returned Saturation data. |
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464 * @return Error code. |
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465 */ |
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466 virtual TInt GetSaturation( TUint16& aSaturation ) const = 0; |
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467 |
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468 /** |
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469 * Gets the Sharpness tag data. |
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470 * @since 2.6 |
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471 * @param aSharpness Returned Sharpness data. |
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472 * @return Error code. |
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473 */ |
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474 virtual TInt GetSharpness( TUint16& aSharpness ) const = 0; |
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475 |
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476 /** |
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477 * Gets the Exif Version tag data. |
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478 * @since 2.6 |
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479 * @param aExifVersion Returned Exif Version data. |
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480 * @return Error code. |
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481 */ |
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482 virtual TInt GetExifVersion( TUint32& aExifVersion ) const = 0; |
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483 |
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484 /** |
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485 * Gets the Flash Pix Version tag data. |
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486 * @since 2.6 |
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487 * @param aFlashPixVersion Returned Flash Pix Version data. |
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488 * @return Error code. |
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489 */ |
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490 virtual TInt GetFlashPixVersion( TUint32& aFlashPixVersion ) const = 0; |
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491 |
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492 /** |
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493 * Gets the Interoperability Ifd Pointer tag data. |
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494 * @since 2.6 |
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495 * @param aInteroperabilityIfdPointer Returned Interoperability Ifd |
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496 * Pointer data. |
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497 * @return Error code. |
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498 */ |
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499 virtual TInt GetInteroperabilityIfdPointer( |
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500 TUint32& aInteroperabilityIfdPointer ) const = 0; |
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501 |
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502 /** |
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503 * Gets the thumbnail X Resolution tag data. |
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504 * @since 2.6 |
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505 * @param aXResolution1 Returned thumbnail X Resolution numerator. |
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506 * @param aXResolution1 Returned thumbnail X Resolution denominator. |
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507 * @return Error code. |
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508 */ |
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509 virtual TInt GetThumbnailXResolution( |
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510 TUint32& aXResolution1, |
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511 TUint32& aXResolution2 ) const = 0; |
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512 |
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513 /** |
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514 * Gets the thumbnail Y Resolution tag data. |
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515 * @since 2.6 |
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516 * @param aYResolution1 Returned thumbnail Y Resolution numerator. |
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517 * @param aYResolution1 Returned thumbnail Y Resolution denominator. |
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518 * @return Error code. |
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519 */ |
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520 virtual TInt GetThumbnailYResolution( |
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521 TUint32& aYResolution1, |
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522 TUint32& aYResolution2 ) const = 0; |
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523 |
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524 /** |
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525 * Gets the thumbnail Resolution Unit tag data. |
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526 * @since 2.6 |
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527 * @param aResolutionUnit Returned thumbnail Resolution Unit data. |
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528 * @return Error code. |
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529 */ |
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530 virtual TInt GetThumbnailResolutionUnit( |
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531 TUint16& aResolutionUnit ) const = 0; |
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532 |
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533 /** |
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534 * Gets the thumbnail Compression tag data. |
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535 * @since 2.6 |
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536 * @param aCompression Returned thumbnail Compression data. |
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537 * @return Error code. |
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538 */ |
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539 virtual TInt GetThumbnailCompression( TUint16& aCompression ) const = 0; |
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540 |
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541 /** |
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542 * Gets the thumbnail Jpeg Interchange Format tag data. |
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543 * @since 2.6 |
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544 * @param aJpegInterchangeFormat Returned thumbnail Jpeg Interchange |
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545 * Format data. |
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546 * @return Error code. |
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547 */ |
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548 virtual TInt GetJpegInterchangeFormat( |
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549 TUint32& aJpegInterchangeFormat ) const = 0; |
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550 |
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551 /** |
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552 * Gets the thumbnail Jpeg Interchange Format Length tag data. |
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553 * @since 2.6 |
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554 * @param aJpegInterchangeFormatLength Returned thumbnail Jpeg |
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555 * Interchange Format Length data. |
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556 * @return Error code. |
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557 */ |
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558 virtual TInt GetJpegInterchangeFormatLength( |
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559 TUint32& aJpegInterchangeFormatLength ) const = 0; |
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560 |
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561 /** |
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562 * Returns a copy of whole Exif APP1 segment in a descriptor. |
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563 * @since 2.6 |
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564 * @return Descriptor containing the Exif APP1 segment data. |
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565 */ |
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566 virtual HBufC8* GetExifAppSegmentL() const = 0; |
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567 |
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568 /** |
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569 * Gets the Shutter Speed Value tag data. |
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570 * @since 2.6 |
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571 * @param aShutterSpeedValue1 Shutter Speed Value numerator. |
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572 * @param aShutterSpeedValue2 Shutter Speed Value denominator. |
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573 * @return Error code. |
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574 */ |
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575 virtual TInt GetShutterSpeedValue( TInt32& aShutterSpeedValue1, |
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576 TInt32& aShutterSpeedValue2 ) const = 0; |
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577 |
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578 /** |
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579 * Gets the Brightness Value tag data. |
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580 * @since 2.6 |
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581 * @param aBrightnessValue1 Brightness Value numerator. |
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582 * @param aBrightnessValue2 Brightness Value denominator. |
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583 * @return Error code. |
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584 */ |
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585 virtual TInt GetBrightnessValue( TInt32& aBrightnessValue1, |
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586 TInt32& aBrightnessValue2 ) const = 0; |
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587 |
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588 /** |
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589 * Gets the Custom Rendered tag data. |
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590 * @since 2.6 |
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591 * @param aCustomRendered Returned Custom Rendered data. |
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592 * @return Error code. |
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593 */ |
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594 virtual TInt GetCustomRendered( TUint16& aCustomRendered ) const = 0; |
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595 |
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596 /** |
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597 * Gets the Gain Control tag data. |
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598 * @since 2.6 |
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599 * @param aGainControl Returned Gain Control data. |
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600 * @return Error code. |
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601 */ |
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602 virtual TInt GetGainControl( TUint16& aGainControl ) const = 0; |
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603 |
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604 /** |
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605 * Gets the Gps Version tag data. |
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606 * @since 2.6 |
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607 * @param aGpsVersion Returned Gps Version data. |
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608 * @return Error code. |
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609 */ |
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610 virtual TInt GetGpsVersion( TUint32& aGpsVersion ) const = 0; |
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611 }; |
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612 |
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613 #endif // EXIFREAD_H |
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614 |
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615 // End of File |