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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 "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.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 IFD structure handling classes. |
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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 // INCLUDE FILES |
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20 #include "ExifRead.h" |
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21 #include "ExifTagImpl.h" |
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22 #include "ExifIfd.h" |
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23 #include "ExifCommon.h" |
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24 #include "ExifValueTable.h" |
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25 |
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26 // ============================ CLASS CExifIfd ================================= |
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27 // ============================ MEMBER FUNCTIONS =============================== |
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28 |
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29 // ----------------------------------------------------------------------------- |
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30 // CExifIfd::CExifIfd |
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31 // C++ default constructor can NOT contain any code, that |
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32 // might leave. |
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33 // ----------------------------------------------------------------------------- |
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34 // |
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35 CExifIfd::CExifIfd() : iTagArray( sizeof( CExifTagImpl* ) ) |
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36 { |
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37 } |
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38 |
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39 // ----------------------------------------------------------------------------- |
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40 // CExifIfd::ConstructL |
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41 // Symbian 2nd phase constructor can leave. |
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42 // ----------------------------------------------------------------------------- |
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43 // |
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44 void CExifIfd::ConstructL() |
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45 { |
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46 } |
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47 |
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48 // ----------------------------------------------------------------------------- |
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49 // CExifIfd::NewBaseL |
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50 // Two-phased constructor. Instantiates and returns the relevant derived class. |
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51 // ----------------------------------------------------------------------------- |
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52 // |
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53 CExifIfd* CExifIfd::NewBaseL( TExifIfdType aIfdType ) |
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54 { |
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55 switch ( aIfdType ) |
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56 { |
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57 case EIfd0: |
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58 return CExifIfd0::NewL(); |
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59 case EIfdExif: |
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60 return CExifIfdExif::NewL(); |
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61 case EIfd1: |
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62 return CExifIfd1::NewL(); |
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63 case EIfdGps: |
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64 return CExifIfdGps::NewL(); |
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65 case EIfdIntOp: |
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66 return CExifIfdIntOp::NewL(); |
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67 default: |
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68 User::Leave( KErrGeneral ); |
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69 } |
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70 return NULL; |
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71 } |
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72 |
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73 // Destructor |
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74 CExifIfd::~CExifIfd() |
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75 { |
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76 iTagArray.ResetAndDestroy(); |
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77 } |
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78 |
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79 // ----------------------------------------------------------------------------- |
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80 // CExifIfd::IsValid |
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81 // Checks if the IFD is in valid format, and contains all mandatory tags. |
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82 // ----------------------------------------------------------------------------- |
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83 // |
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84 TBool CExifIfd::IsValid() const |
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85 { |
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86 if ( iTagArray.Count() ) |
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87 { |
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88 return ETrue; |
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89 } |
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90 return EFalse; |
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91 } |
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92 |
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93 // ----------------------------------------------------------------------------- |
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94 // CExifIfd::TagExists |
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95 // Checks if specified tag exists in the IFD. |
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96 // ----------------------------------------------------------------------------- |
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97 // |
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98 TBool CExifIfd::TagExists( TUint16 aTagId ) const |
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99 { |
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100 for ( TInt i = 0; i < iTagArray.Count(); ++i ) |
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101 { |
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102 if ( aTagId == iTagArray[i]->Id() ) |
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103 { |
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104 return ETrue; |
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105 } |
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106 } |
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107 return EFalse; |
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108 } |
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109 |
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110 // ----------------------------------------------------------------------------- |
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111 // CExifIfd::Size |
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112 // Returns the size of the IFD structure in bytes. |
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113 // ----------------------------------------------------------------------------- |
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114 // |
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115 TUint16 CExifIfd::Size() const |
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116 { |
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117 if ( !iTagArray.Count() ) |
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118 { |
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119 return 0; |
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120 } |
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121 // Size of the tags + 6 bytes (the next ifd offset and number of tags info) |
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122 return STATIC_CAST( TUint16, iSize + 6 ); |
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123 } |
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124 |
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125 // ----------------------------------------------------------------------------- |
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126 // CExifIfd::SetNextIfdOffset |
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127 // Sets the next IFD offset. |
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128 // ----------------------------------------------------------------------------- |
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129 // |
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130 void CExifIfd::SetNextIfdOffset( TUint32 aIfdOffset ) |
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131 { |
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132 iNextIfdOffset = aIfdOffset; |
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133 } |
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134 |
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135 // ----------------------------------------------------------------------------- |
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136 // CExifIfd::WriteTagsL |
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137 // Writes the tag data in the IFD structure to the location defined by the |
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138 // given pointer and the offset. |
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139 // ----------------------------------------------------------------------------- |
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140 // |
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141 void CExifIfd::WriteTagsL( TUint16*& aExifDataPtr, TUint& aPos ) const |
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142 { |
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143 if ( !iTagArray.Count() ) |
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144 { |
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145 User::Leave( KErrNotReady ); |
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146 } |
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147 *aExifDataPtr++ = STATIC_CAST( TUint16, iTagArray.Count() ); |
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148 TUint16* ifdForwardPtr = aExifDataPtr + ( iTagArray.Count() * 6 ) + 2; |
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149 TUint32 fwdPos = ( ( iTagArray.Count() * 12 ) - 6 ) + aPos; |
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150 for ( TInt i = 0; i < iTagArray.Count(); ++i ) |
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151 { |
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152 CExifTagImpl* tag = iTagArray[i]; |
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153 *aExifDataPtr++ = tag->Id(); |
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154 CExifTag::TExifTagDataType tagType = tag->DataType(); |
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155 *aExifDataPtr++ = STATIC_CAST( TUint16, tagType ); |
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156 TUint32 count = tag->DataCount(); |
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157 TExifCommon::SetUint32( REINTERPRET_CAST( TUint8*, aExifDataPtr ), |
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158 count ); |
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159 aExifDataPtr += 2; |
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160 TUint noBytes = 0; |
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161 if ( ( tagType == CExifTag::ETagByte ) || |
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162 ( tagType == CExifTag::ETagAscii ) || |
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163 ( tagType == CExifTag::ETagUndefined ) ) |
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164 { |
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165 noBytes = 1; |
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166 } |
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167 else if ( ( tagType == CExifTag::ETagLong ) || |
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168 ( tagType == CExifTag::ETagSlong ) ) |
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169 { |
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170 noBytes = 4; |
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171 } |
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172 else if ( ( tagType == CExifTag::ETagRational ) || |
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173 ( tagType == CExifTag::ETagSrational ) ) |
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174 { |
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175 noBytes = 8; |
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176 } |
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177 else |
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178 { |
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179 noBytes = 2; |
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180 } |
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181 noBytes *= count; |
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182 TPtrC8 tagBuffer = tag->Data(); |
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183 if ( noBytes < 5 ) |
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184 { |
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185 TUint32 tagData = 0; |
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186 switch ( noBytes ) |
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187 { |
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188 case 4: |
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189 tagData = TExifCommon::Uint32L( |
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190 CONST_CAST( TUint8*, tagBuffer.Ptr() ) ); |
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191 break; |
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192 case 3: |
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193 tagData = TExifCommon::Uint32L( CONST_CAST( |
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194 TUint8*, tagBuffer.Ptr() ) ) & KThreeByteMask; |
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195 break; |
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196 case 2: |
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197 tagData = TExifCommon::Uint32L( CONST_CAST( |
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198 TUint8*, tagBuffer.Ptr() ) ) & KTwoByteMask; |
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199 break; |
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200 default: |
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201 tagData = TExifCommon::Uint32L( CONST_CAST( |
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202 TUint8*, tagBuffer.Ptr() ) ) & KOneByteMask; |
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203 } |
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204 TExifCommon::SetUint32( |
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205 REINTERPRET_CAST( TUint8*, aExifDataPtr ), tagData ); |
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206 } |
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207 else |
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208 { |
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209 TPtr8 ptr( REINTERPRET_CAST( TUint8*, ifdForwardPtr ), noBytes ); |
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210 ptr.Copy( tagBuffer.Ptr(), noBytes ); |
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211 TExifCommon::SetUint32( |
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212 REINTERPRET_CAST( TUint8*, aExifDataPtr ), fwdPos ); |
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213 if ( noBytes % 2 ) |
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214 { |
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215 ++noBytes; |
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216 ifdForwardPtr += ( noBytes / 2 ); |
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217 *( ( REINTERPRET_CAST( TUint8*, ifdForwardPtr ) ) - 1 ) = 0; |
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218 } |
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219 else |
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220 { |
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221 ifdForwardPtr += ( noBytes / 2 ); |
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222 } |
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223 fwdPos += noBytes; |
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224 } |
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225 aExifDataPtr += 2; |
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226 } |
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227 TExifCommon::SetUint32( |
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228 REINTERPRET_CAST( TUint8*, aExifDataPtr ), iNextIfdOffset ); |
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229 aExifDataPtr = ifdForwardPtr; |
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230 aPos = fwdPos + 12; |
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231 } |
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232 |
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233 // ----------------------------------------------------------------------------- |
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234 // CExifIfd::InsertTagL |
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235 // Inserts/Replaces the given tag in the IFD structure. |
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236 // ----------------------------------------------------------------------------- |
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237 // |
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238 void CExifIfd::InsertTagL( CExifTagImpl* aExifTag, TBool aCheckValidity ) |
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239 { |
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240 LOGTEXT( _L( "ExifLib: CExifIfd::InsertTagL entering" )); |
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241 if ( !aExifTag ) |
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242 { |
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243 LOGTEXT( _L( "ExifLib: CExifIfd::InsertTagL Leaving KErrGeneral" )); |
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244 User::Leave( KErrGeneral ); |
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245 } |
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246 TUint16 tagId = aExifTag->Id(); |
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247 |
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248 if ( aCheckValidity && ( !IsAcceptableTagId( tagId ) ) ) |
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249 { |
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250 LOGTEXT2( _L( "ExifLib: CExifIfd::InsertTagL Leaving KErrNotSupported, tagId=0x%x" ), tagId); |
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251 User::Leave( KErrNotSupported ); |
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252 } |
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253 |
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254 TInt index = -1; |
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255 for ( TInt i = 0; ( i < iTagArray.Count() ) && ( index < 0 ); ++i ) |
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256 { |
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257 if ( iTagArray[i]->Id() > tagId ) |
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258 { |
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259 index = i; |
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260 } |
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261 else if ( iTagArray[i]->Id() == tagId ) |
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262 { |
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263 iSize = STATIC_CAST( TUint16, iSize - iTagArray[i]->Size() ); |
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264 delete iTagArray[i]; |
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265 iTagArray[i] = aExifTag; |
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266 iSize = STATIC_CAST( TUint16, iSize + aExifTag->Size() ); |
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267 LOGTEXT( _L( "ExifLib: CExifIfd::InsertTagL returning" )); |
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268 return; |
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269 } |
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270 else |
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271 { |
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272 } |
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273 } |
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274 |
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275 if ( index < 0 ) |
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276 { |
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277 iTagArray.AppendL( aExifTag ); |
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278 } |
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279 else |
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280 { |
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281 iTagArray.InsertL( index, aExifTag ); |
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282 } |
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283 iSize = STATIC_CAST( TUint16, iSize + aExifTag->Size() ); |
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284 LOGTEXT( _L( "ExifLib: CExifIfd::InsertTagL returning" )); |
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285 } |
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286 |
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287 // ----------------------------------------------------------------------------- |
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288 // CExifIfd::DeleteTag |
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289 // Removes the specified tag from the IFD structure |
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290 // ----------------------------------------------------------------------------- |
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291 // |
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292 TInt CExifIfd::DeleteTag( TUint16 aTagId ) |
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293 { |
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294 for ( TInt i = 0; i < iTagArray.Count(); ++i ) |
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295 { |
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296 if ( iTagArray[i]->Id() == aTagId ) |
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297 { |
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298 iSize = STATIC_CAST( TUint16, iSize - iTagArray[i]->Size() ); |
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299 delete iTagArray[i]; |
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300 iTagArray.Delete( i ); |
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301 return KErrNone; |
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302 } |
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303 } |
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304 return KErrNotFound; |
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305 } |
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306 |
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307 // ----------------------------------------------------------------------------- |
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308 // CExifIfd::GetTagL |
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309 // Gets the unmodifiable specified tag instance from the IFD structure. |
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310 // ----------------------------------------------------------------------------- |
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311 // |
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312 const CExifTagImpl* CExifIfd::GetTagL( TUint16 aTagId ) const |
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313 { |
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314 if ( !IsAcceptableTagId( aTagId ) ) |
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315 { |
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316 User::Leave( KErrNotSupported ); |
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317 } |
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318 for ( TInt i = 0; i < iTagArray.Count(); ++i ) |
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319 { |
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320 if ( iTagArray[i]->Id() == aTagId ) |
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321 { |
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322 return iTagArray[i]; |
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323 } |
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324 } |
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325 User::Leave( KErrNotFound ); |
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326 return NULL; |
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327 } |
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328 |
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329 // ----------------------------------------------------------------------------- |
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330 // CExifIfd::GetTagIdsL |
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331 // Gets the IDs and amount of the tags existing in the IFD structure. |
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332 // ----------------------------------------------------------------------------- |
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333 // |
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334 TUint16* CExifIfd::GetTagIdsL( TInt& aNoTags ) const |
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335 { |
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336 if ( !iTagArray.Count() ) |
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337 { |
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338 User::Leave( KErrNotFound ); |
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339 } |
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340 |
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341 TUint16* tagIds = STATIC_CAST( TUint16*, |
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342 User::AllocL( sizeof( TUint16 ) * iTagArray.Count() ) ); |
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343 for ( TInt i = 0; i < iTagArray.Count(); ++i ) |
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344 { |
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345 tagIds[i] = iTagArray[i]->Id(); |
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346 } |
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347 |
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348 aNoTags = iTagArray.Count(); |
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349 return tagIds; |
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350 } |
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351 |
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352 // ----------------------------------------------------------------------------- |
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353 // CExifIfd::IsAcceptableTagId |
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354 // Checks if the given tag ID is one of the IDs that can be stored in the IFD |
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355 // structure. |
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356 // ----------------------------------------------------------------------------- |
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357 // |
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358 TBool CExifIfd::IsAcceptableTagId( TUint16 aTagId ) const |
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359 { |
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360 TInt noTags = 0; |
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361 const TReferenceTag* tags = NULL; |
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362 switch ( iIfdType ) |
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363 { |
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364 case EIfd0: |
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365 noTags = KNoIfd0Tags; |
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366 tags = ifd0Tags; |
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367 break; |
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368 case EIfdExif: |
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369 noTags = KNoIfdExifTags; |
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370 tags = ifdExifTags; |
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371 break; |
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372 case EIfd1: |
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373 noTags = KNoIfd1Tags; |
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374 tags = ifd1Tags; |
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375 break; |
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376 case EIfdGps: |
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377 noTags = KNoIfdGpsTags; |
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378 tags = ifdGpsTags; |
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379 break; |
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380 case EIfdIntOp: |
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381 noTags = KNoIfdIntOpTags; |
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382 tags = ifdIntOpTags; |
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383 break; |
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384 default: |
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385 return EFalse; |
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386 } |
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387 |
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388 TInt k = 0; |
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389 for ( k = 0; k < noTags; ++k ) |
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390 { |
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391 if ( tags[k].iId == aTagId ) |
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392 { |
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393 return ETrue; |
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394 } |
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395 } |
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396 return EFalse; |
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397 } |
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398 |
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399 |
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400 // ============================ CLASS CExifIfd0 ================================ |
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401 // ============================ MEMBER FUNCTIONS =============================== |
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402 |
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403 // ----------------------------------------------------------------------------- |
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404 // CExifIfd0::CExifIfd0 |
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405 // C++ default constructor can NOT contain any code, that |
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406 // might leave. |
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407 // ----------------------------------------------------------------------------- |
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408 // |
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409 CExifIfd0::CExifIfd0() |
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410 { |
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411 } |
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412 |
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413 // ----------------------------------------------------------------------------- |
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414 // CExifIfd0::NewL |
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415 // Two-phased constructor. |
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416 // ----------------------------------------------------------------------------- |
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417 // |
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418 CExifIfd0* CExifIfd0::NewL() |
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419 { |
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420 CExifIfd0* self = new( ELeave ) CExifIfd0(); |
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421 CleanupStack::PushL( self ); |
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422 self->ConstructL(); |
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423 CleanupStack::Pop(); |
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424 return self; |
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425 } |
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426 |
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427 // ----------------------------------------------------------------------------- |
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428 // CExifIfd0::ConstructL |
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429 // Symbian 2nd phase constructor can leave. |
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430 // ----------------------------------------------------------------------------- |
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431 // |
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432 void CExifIfd0::ConstructL() |
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433 { |
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434 } |
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435 |
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436 // Destructor |
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437 CExifIfd0::~CExifIfd0() |
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438 { |
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439 } |
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440 |
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441 // ----------------------------------------------------------------------------- |
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442 // CExifIfd0::IsValid |
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443 // Checks if the IFD0 is in valid format, and contains all mandatory IFD0 tags. |
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444 // ----------------------------------------------------------------------------- |
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445 // |
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446 TBool CExifIfd0::IsValid() const |
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447 { |
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448 if ( !iTagArray.Count() ) |
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449 { |
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450 return EFalse; |
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451 } |
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452 for ( TInt i = 0; i < KNoMandatoryIfd0Tags; ++i ) |
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453 { |
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454 TBool found = EFalse; |
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455 TInt j = 0; |
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456 for ( j = 0; ( j < iTagArray.Count() ) && ( !found ); ++j ) |
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457 { |
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458 if ( ifd0Tags[i].iId == iTagArray[j]->Id() ) |
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459 { |
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460 found = ETrue; |
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461 } |
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462 } |
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463 if ( !found ) |
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464 { |
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465 return EFalse; |
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466 } |
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467 } |
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468 return ETrue; |
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469 } |
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470 |
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471 |
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472 // ============================ CLASS CExifIfdExif ============================= |
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473 // ============================ MEMBER FUNCTIONS =============================== |
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474 |
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475 // ----------------------------------------------------------------------------- |
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476 // CExifIfdExif::CExifIfdExif |
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477 // C++ default constructor can NOT contain any code, that |
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478 // might leave. |
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479 // ----------------------------------------------------------------------------- |
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480 // |
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481 CExifIfdExif::CExifIfdExif ( ) |
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482 { |
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483 iIfdType = EIfdExif; |
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484 } |
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485 |
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486 // ----------------------------------------------------------------------------- |
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487 // CExifIfdExif::NewL |
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488 // Two-phased constructor. |
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489 // ----------------------------------------------------------------------------- |
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490 // |
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491 CExifIfdExif* CExifIfdExif::NewL() |
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492 { |
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493 CExifIfdExif* self = new( ELeave ) CExifIfdExif(); |
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494 CleanupStack::PushL( self ); |
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495 self->ConstructL(); |
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496 CleanupStack::Pop(); |
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497 return self; |
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498 } |
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499 |
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500 // ----------------------------------------------------------------------------- |
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501 // CExifIfdExif::ConstructL |
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502 // Symbian 2nd phase constructor can leave. |
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503 // ----------------------------------------------------------------------------- |
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504 // |
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505 void CExifIfdExif::ConstructL() |
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506 { |
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507 } |
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508 |
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509 // Destructor |
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510 CExifIfdExif::~CExifIfdExif ( ) |
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511 { |
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512 } |
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513 |
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514 // ----------------------------------------------------------------------------- |
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515 // CExifIfdExif::IsValid |
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516 // Checks if the Exif IFD is in valid format, and contains all mandatory Exif |
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517 // IFD tags. |
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518 // ----------------------------------------------------------------------------- |
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519 // |
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520 TBool CExifIfdExif::IsValid() const |
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521 { |
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522 if ( !iTagArray.Count() ) |
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523 { |
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524 return EFalse; |
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525 } |
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526 for ( TInt i = 0; i < KNoMandatoryIfdExifTags; ++i ) |
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527 { |
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528 TBool found = EFalse; |
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529 TInt j = 0; |
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530 for ( j = 0; ( j < iTagArray.Count() ) && ( !found ); ++j ) |
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531 { |
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532 if ( ifdExifTags[i].iId == iTagArray[j]->Id() ) |
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533 { |
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534 found = ETrue; |
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535 } |
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536 } |
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537 if ( !found ) |
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538 { |
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539 return EFalse; |
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540 } |
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541 } |
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542 return ETrue; |
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543 } |
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544 |
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545 |
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546 // ============================ CLASS CExifIfd1 ================================ |
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547 // ============================ MEMBER FUNCTIONS =============================== |
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548 |
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549 // ----------------------------------------------------------------------------- |
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550 // CExifIfd1::CExifIfd1 |
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551 // C++ default constructor can NOT contain any code, that |
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552 // might leave. |
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553 // ----------------------------------------------------------------------------- |
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554 // |
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555 CExifIfd1::CExifIfd1() |
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556 { |
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557 iIfdType = EIfd1; |
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558 } |
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559 |
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560 // ----------------------------------------------------------------------------- |
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561 // CExifIfd1::NewL |
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562 // Two-phased constructor. |
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563 // ----------------------------------------------------------------------------- |
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564 // |
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565 CExifIfd1* CExifIfd1::NewL() |
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566 { |
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567 CExifIfd1* self = new( ELeave ) CExifIfd1(); |
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568 CleanupStack::PushL( self ); |
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569 self->ConstructL(); |
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570 CleanupStack::Pop(); |
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571 return self; |
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572 } |
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573 |
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574 // ----------------------------------------------------------------------------- |
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575 // CExifIfd1::ConstructL |
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576 // Symbian 2nd phase constructor can leave. |
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577 // ----------------------------------------------------------------------------- |
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578 // |
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579 void CExifIfd1::ConstructL() |
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580 { |
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581 } |
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582 |
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583 // Destructor |
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584 CExifIfd1::~CExifIfd1() |
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585 { |
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586 if ( iThumbnailBuffer ) |
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587 { |
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588 delete iThumbnailBuffer; |
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589 } |
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590 } |
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591 |
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592 // ----------------------------------------------------------------------------- |
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593 // CExifIfd1::IsValid |
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594 // Checks if the Exif IFD is in valid format, and contains all mandatory Exif |
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595 // IFD tags. |
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596 // ----------------------------------------------------------------------------- |
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597 // |
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598 TBool CExifIfd1::IsValid() const |
|
599 { |
|
600 if ( !iTagArray.Count() ) |
|
601 { |
|
602 return EFalse; |
|
603 } |
|
604 for ( TInt i = 0; i < KNoMandatoryIfd1Tags; ++i ) |
|
605 { |
|
606 TBool found = EFalse; |
|
607 TInt j = 0; |
|
608 for ( j = 0; ( j < iTagArray.Count() ) && ( !found ); ++j ) |
|
609 { |
|
610 if ( ifd1Tags[i].iId == iTagArray[j]->Id() ) |
|
611 { |
|
612 found = ETrue; |
|
613 } |
|
614 } |
|
615 if ( !found ) |
|
616 { |
|
617 return EFalse; |
|
618 } |
|
619 } |
|
620 if ( !iThumbnailBuffer ) |
|
621 { |
|
622 return EFalse; |
|
623 } |
|
624 return ETrue; |
|
625 } |
|
626 |
|
627 // ----------------------------------------------------------------------------- |
|
628 // CExifIfd1::WriteThumbnailL |
|
629 // Writes the Exif thumbnail image to the location defined by the given pointer |
|
630 // and the offset. |
|
631 // ----------------------------------------------------------------------------- |
|
632 // |
|
633 void CExifIfd1::WriteThumbnailL( TUint8*& aExifDataPtr, TUint& aPos ) const |
|
634 { |
|
635 if ( !iThumbnailBuffer ) |
|
636 { |
|
637 User::Leave( KErrNotReady ); |
|
638 } |
|
639 TPtr8 ptr( aExifDataPtr, iThumbnailBuffer->Length() ); |
|
640 ptr.Copy( iThumbnailBuffer->Ptr(), iThumbnailBuffer->Length() ); |
|
641 aExifDataPtr += iThumbnailBuffer->Length(); |
|
642 aPos += iThumbnailBuffer->Length(); |
|
643 } |
|
644 |
|
645 // ----------------------------------------------------------------------------- |
|
646 // CExifIfd1::ThumbnailSize |
|
647 // Returns the size of the Exif thumbnail image in bytes. |
|
648 // ----------------------------------------------------------------------------- |
|
649 // |
|
650 TUint16 CExifIfd1::ThumbnailSize() const |
|
651 { |
|
652 if ( !iThumbnailBuffer ) |
|
653 { |
|
654 return 0; |
|
655 } |
|
656 return STATIC_CAST( TUint16, iThumbnailBuffer->Length() ); |
|
657 } |
|
658 |
|
659 // ----------------------------------------------------------------------------- |
|
660 // CExifIfd1::SetThumbnailData |
|
661 // Inserts/Updates the given Exif thumbnail image. |
|
662 // ----------------------------------------------------------------------------- |
|
663 // |
|
664 TInt CExifIfd1::SetThumbnailData( TDesC8* aThumbnailData ) |
|
665 { |
|
666 if ( !aThumbnailData ) |
|
667 { |
|
668 return KErrGeneral; |
|
669 } |
|
670 if ( iThumbnailBuffer ) |
|
671 { |
|
672 delete iThumbnailBuffer; |
|
673 } |
|
674 iThumbnailBuffer = aThumbnailData; |
|
675 return KErrNone; |
|
676 } |
|
677 |
|
678 // ----------------------------------------------------------------------------- |
|
679 // CExifIfd1::GetThumbnailData |
|
680 // Gets the Exif thumbnail image. |
|
681 // ----------------------------------------------------------------------------- |
|
682 // |
|
683 TInt CExifIfd1::GetThumbnailData( TDesC8*& aThumbnailData ) const |
|
684 { |
|
685 if ( !iThumbnailBuffer ) |
|
686 { |
|
687 return KErrNotFound; |
|
688 } |
|
689 aThumbnailData = iThumbnailBuffer; |
|
690 return KErrNone; |
|
691 } |
|
692 |
|
693 // ----------------------------------------------------------------------------- |
|
694 // CExifIfd1::RemoveThumbnailData |
|
695 // Removes the Exif thumbnail image. |
|
696 // ----------------------------------------------------------------------------- |
|
697 // |
|
698 TInt CExifIfd1::RemoveThumbnailData() |
|
699 { |
|
700 if ( !iThumbnailBuffer ) |
|
701 { |
|
702 return KErrNotFound; |
|
703 } |
|
704 delete iThumbnailBuffer; |
|
705 iThumbnailBuffer = 0; |
|
706 return KErrNone; |
|
707 } |
|
708 |
|
709 // ----------------------------------------------------------------------------- |
|
710 // CExifIfd1::InsertTagL |
|
711 // Inserts/Replaces the given tag in the IFD structure. |
|
712 // ----------------------------------------------------------------------------- |
|
713 // |
|
714 void CExifIfd1::InsertTagL( CExifTagImpl* aExifTag, TBool aCheckValidity ) |
|
715 { |
|
716 LOGTEXT( _L( "ExifLib: CExifIfd1::InsertTagL entering" )); |
|
717 if ( !aExifTag ) |
|
718 { |
|
719 LOGTEXT( _L( "ExifLib: CExifIfd1::InsertTagL Leaving KErrGeneral" )); |
|
720 User::Leave( KErrGeneral ); |
|
721 } |
|
722 TUint16 tagId = aExifTag->Id(); |
|
723 if ( tagId == KIdCompression ) |
|
724 { |
|
725 if ( aExifTag->Data().Length() != 2 ) |
|
726 { |
|
727 LOGTEXT2( _L( "ExifLib: CExifIfd1::InsertTagL Leaving KErrCorrupt, aExifTag->Data().Length()=0x%x" ), aExifTag->Data().Length()); |
|
728 User::Leave( KErrCorrupt ); |
|
729 } |
|
730 TUint16* ptr = REINTERPRET_CAST( TUint16*, CONST_CAST( TUint8*, |
|
731 aExifTag->Data().Ptr() ) ); |
|
732 if ( *ptr != 6 ) |
|
733 { |
|
734 LOGTEXT2( _L( "ExifLib: CExifIfd1::InsertTagL Leaving KErrNotSupported, *ptr=0x%x" ), *ptr); |
|
735 User::Leave( KErrNotSupported ); |
|
736 } |
|
737 } |
|
738 |
|
739 if ( aCheckValidity && ( !IsAcceptableTagId( tagId ) ) ) |
|
740 { |
|
741 LOGTEXT2( _L( "ExifLib: CExifIfd1::InsertTagL Leaving KErrNotSupported, tagId=0x%x" ), tagId); |
|
742 User::Leave( KErrNotSupported ); |
|
743 } |
|
744 |
|
745 TInt index = -1; |
|
746 for ( TInt i = 0; ( i < iTagArray.Count() ) && ( index < 0 ); ++i ) |
|
747 { |
|
748 if ( iTagArray[i]->Id() > tagId ) |
|
749 { |
|
750 index = i; |
|
751 } |
|
752 else if ( iTagArray[i]->Id() == tagId ) |
|
753 { |
|
754 iSize = STATIC_CAST( TUint16, iSize - iTagArray[i]->Size() ); |
|
755 delete iTagArray[i]; |
|
756 iTagArray[i] = aExifTag; |
|
757 iSize = STATIC_CAST( TUint16, iSize + aExifTag->Size() ); |
|
758 LOGTEXT( _L( "ExifLib: CExifIfd1::InsertTagL returning" )); |
|
759 return; |
|
760 } |
|
761 else |
|
762 { |
|
763 } |
|
764 } |
|
765 |
|
766 if ( index < 0 ) |
|
767 { |
|
768 iTagArray.AppendL( aExifTag ); |
|
769 } |
|
770 else |
|
771 { |
|
772 iTagArray.InsertL( index, aExifTag ); |
|
773 } |
|
774 iSize = STATIC_CAST( TUint16, iSize + aExifTag->Size() ); |
|
775 LOGTEXT( _L( "ExifLib: CExifIfd1::InsertTagL returning" )); |
|
776 } |
|
777 |
|
778 |
|
779 // ============================ CLASS CExifIfdGps ============================== |
|
780 // ============================ MEMBER FUNCTIONS =============================== |
|
781 |
|
782 // ----------------------------------------------------------------------------- |
|
783 // CExifIfdGps::CExifIfdGps |
|
784 // C++ default constructor can NOT contain any code, that |
|
785 // might leave. |
|
786 // ----------------------------------------------------------------------------- |
|
787 // |
|
788 CExifIfdGps::CExifIfdGps() |
|
789 { |
|
790 iIfdType = EIfdGps; |
|
791 } |
|
792 |
|
793 // ----------------------------------------------------------------------------- |
|
794 // CExifIfdGps::NewL |
|
795 // Two-phased constructor. |
|
796 // ----------------------------------------------------------------------------- |
|
797 // |
|
798 CExifIfdGps* CExifIfdGps::NewL() |
|
799 { |
|
800 CExifIfdGps* self = new( ELeave ) CExifIfdGps(); |
|
801 CleanupStack::PushL( self ); |
|
802 self->ConstructL(); |
|
803 CleanupStack::Pop(); |
|
804 return self; |
|
805 } |
|
806 |
|
807 // ----------------------------------------------------------------------------- |
|
808 // CExifIfdGps::ConstructL |
|
809 // Symbian 2nd phase constructor can leave. |
|
810 // ----------------------------------------------------------------------------- |
|
811 // |
|
812 void CExifIfdGps::ConstructL() |
|
813 { |
|
814 } |
|
815 |
|
816 // Destructor |
|
817 CExifIfdGps::~CExifIfdGps() |
|
818 { |
|
819 } |
|
820 |
|
821 // ----------------------------------------------------------------------------- |
|
822 // CExifIfdGps::IsValid |
|
823 // Checks if the Gps IFD is in valid format, and contains all Gps IFD mandatory |
|
824 // tags. |
|
825 // ----------------------------------------------------------------------------- |
|
826 // |
|
827 TBool CExifIfdGps::IsValid() const |
|
828 { |
|
829 if ( !iTagArray.Count() ) |
|
830 { |
|
831 return EFalse; |
|
832 } |
|
833 for ( TInt i = 0; i < KNoMandatoryIfdGpsTags; ++i ) |
|
834 { |
|
835 TBool found = EFalse; |
|
836 TInt j = 0; |
|
837 for ( j = 0; ( j < iTagArray.Count() ) && ( !found ); ++j ) |
|
838 { |
|
839 if ( ifdGpsTags[i].iId == iTagArray[j]->Id() ) |
|
840 { |
|
841 found = ETrue; |
|
842 } |
|
843 } |
|
844 if ( !found ) |
|
845 { |
|
846 return EFalse; |
|
847 } |
|
848 } |
|
849 return ETrue; |
|
850 } |
|
851 |
|
852 |
|
853 // ============================ CLASS CExifIfdIntOp ============================ |
|
854 // ============================ MEMBER FUNCTIONS =============================== |
|
855 |
|
856 // ----------------------------------------------------------------------------- |
|
857 // CExifIfdIntOp::CExifIfdIntOp |
|
858 // C++ default constructor can NOT contain any code, that |
|
859 // might leave. |
|
860 // ----------------------------------------------------------------------------- |
|
861 // |
|
862 CExifIfdIntOp::CExifIfdIntOp() |
|
863 { |
|
864 iIfdType = EIfdIntOp; |
|
865 } |
|
866 |
|
867 // ----------------------------------------------------------------------------- |
|
868 // CExifIfdIntOp::NewL |
|
869 // Two-phased constructor. |
|
870 // ----------------------------------------------------------------------------- |
|
871 // |
|
872 CExifIfdIntOp* CExifIfdIntOp::NewL() |
|
873 { |
|
874 CExifIfdIntOp* self = new( ELeave ) CExifIfdIntOp(); |
|
875 CleanupStack::PushL( self ); |
|
876 self->ConstructL(); |
|
877 CleanupStack::Pop(); |
|
878 return self; |
|
879 } |
|
880 |
|
881 // ----------------------------------------------------------------------------- |
|
882 // CExifIfdIntOp::ConstructL |
|
883 // Symbian 2nd phase constructor can leave. |
|
884 // ----------------------------------------------------------------------------- |
|
885 // |
|
886 void CExifIfdIntOp::ConstructL() |
|
887 { |
|
888 } |
|
889 |
|
890 // Destructor |
|
891 CExifIfdIntOp::~CExifIfdIntOp() |
|
892 { |
|
893 } |
|
894 |
|
895 // ----------------------------------------------------------------------------- |
|
896 // CExifIfdIntOp::IsValid |
|
897 // Checks if the Interoperability IFD is in valid format, and contains all IOP |
|
898 // mandatory tags. |
|
899 // ----------------------------------------------------------------------------- |
|
900 // |
|
901 TBool CExifIfdIntOp::IsValid() const |
|
902 { |
|
903 /* KNoMandatoryIfdIntOpTags is 0, no need for this checking loop. |
|
904 if ( !iTagArray.Count() ) |
|
905 { |
|
906 return EFalse; |
|
907 } |
|
908 for ( TUint i = 0; i < KNoMandatoryIfdIntOpTags; ++i ) |
|
909 { |
|
910 TBool found = EFalse; |
|
911 TUint j = 0; |
|
912 for ( j = 0; ( j < iTagArray.Count() ) && ( !found ); ++j ) |
|
913 { |
|
914 if ( ifdIntOpTags[i].iId == iTagArray[j]->Id() ) |
|
915 { |
|
916 found = ETrue; |
|
917 } |
|
918 } |
|
919 if ( !found ) |
|
920 { |
|
921 return EFalse; |
|
922 } |
|
923 } |
|
924 */ |
|
925 return ETrue; |
|
926 } |