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1 // Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // This is the body of the ICL recognizer utility class |
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15 // |
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16 // |
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17 |
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18 #include "ImageConversion.h" |
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19 #include "ImageResolverAPI.h" |
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20 #include "ImageConvResolvrUtils.h" |
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21 #include "ImageRelay.h" |
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22 #include "EnDecoderUtils.h" |
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23 #include "RecIclUtilBody.h" |
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24 |
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25 // ICL Recognizer Utility class body constructor |
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26 CIclRecognizerUtil::CBody::CBody(): |
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27 CActive(CActive::EPriorityStandard) |
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28 { |
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29 } |
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30 |
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31 CIclRecognizerUtil::CBody::~CBody() |
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32 { |
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33 Cancel(); |
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34 iEcomSession.Close(); |
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35 iFs.Close(); |
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36 iPluginArray.ResetAndDestroy(); |
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37 } |
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38 |
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39 // Request ECom to be notified when interface implementation registration |
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40 // data changes so that we can refresh the list of interface implementations. |
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41 void CIclRecognizerUtil::CBody::StartNotification() |
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42 { |
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43 iEcomSession.NotifyOnChange(iStatus); |
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44 SetActive(); |
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45 } |
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46 |
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47 // build a list of interface implementation objects |
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48 void CIclRecognizerUtil::CBody::BuildControllerListL() |
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49 { |
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50 iPluginArray.ResetAndDestroy(); |
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51 REComSession::ListImplementationsL( |
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52 KImageDecoderInterfaceUid, |
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53 iPluginArray); |
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54 } |
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55 |
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56 void CIclRecognizerUtil::CBody::ConstructL() |
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57 { |
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58 BuildControllerListL(); |
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59 |
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60 CActiveScheduler::Add(this); |
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61 |
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62 User::LeaveIfError(iFs.Connect()); |
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63 |
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64 iEcomSession = REComSession::OpenL(); |
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65 |
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66 // request notification from ECOM of any file system changes |
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67 StartNotification(); |
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68 } |
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69 |
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70 void CIclRecognizerUtil::CBody::RunL() |
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71 { |
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72 BuildControllerListL(); |
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73 StartNotification(); |
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74 } |
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75 |
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76 void CIclRecognizerUtil::CBody::DoCancel() |
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77 { |
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78 if (iStatus == KRequestPending) |
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79 iEcomSession.CancelNotifyOnChange(iStatus); |
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80 } |
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81 |
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82 // Determine whether the supplied data header or file extension is recognized |
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83 // and if so return the associated MIME type |
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84 // @param aImageData |
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85 // A descriptor containing the header. Set to KNullDesC8 for match by file extension. |
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86 // @param aFileName |
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87 // A file name for file extension matching. Set to KNullDesC for match by image data |
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88 // @param aMimeType |
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89 // A user-supplied descriptor in which the MIME type is returned |
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90 // @return ETrue if a match was found. |
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91 // EFalse if a match was not found. |
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92 // @leave This method may also leave with one of the system-wide error codes. |
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93 // @post If recognized, the caller's descriptor is filled with the MIME types |
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94 TBool CIclRecognizerUtil::CBody::GetMimeTypeL(const TDesC8& aImageData, const TDesC& aFileName, TDes8& aMimeType) |
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95 { |
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96 TBool matchImageData = ETrue; |
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97 HBufC* fileSuffix = NULL; |
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98 |
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99 if(aFileName==KNullDesC) |
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100 {// match on image data |
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101 if (aImageData.Length() < KImageHeaderSize) // There is not enough data in this source |
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102 return EFalse; |
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103 } |
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104 else |
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105 {// match on file extension |
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106 // Ensure aFileName is < KMaxFileName |
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107 if ( aFileName.Length() > KMaxFileName ) |
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108 { |
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109 User::Leave(KErrBadName); |
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110 } |
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111 |
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112 TParse fileName; |
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113 |
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114 TDes* const fName = new(ELeave) TFileName; |
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115 |
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116 CleanupStack::PushL(fName); |
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117 |
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118 fName->Copy(aFileName); |
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119 |
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120 // if illegalifier character has been added to the file name, |
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121 // remove the illegalifier and pass the file name only to the parser. |
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122 if (fName->Match(_L("::*")) == 0) |
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123 { |
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124 fName->Delete(0, 2); |
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125 } |
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126 |
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127 fileName.Set(*fName, NULL, NULL); |
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128 |
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129 CleanupStack::PopAndDestroy(fName); |
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130 |
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131 |
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132 //No file extension |
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133 if (!fileName.ExtPresent()) |
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134 return EFalse; |
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135 |
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136 //Get the suffix |
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137 fileSuffix = fileName.Ext().AllocLC(); |
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138 |
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139 matchImageData = EFalse; |
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140 } |
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141 |
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142 TBool matchFound = EFalse; |
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143 |
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144 // loop through every plugin |
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145 // until we find one that matches the file extension |
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146 const TInt count = iPluginArray.Count(); |
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147 TInt oldMatchLevel = 0; // number of characters matched in best match |
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148 |
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149 for(TInt index = 0; index < count && !matchFound; index++) |
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150 { |
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151 const CImplementationInformation& impData = *(iPluginArray[index]); |
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152 |
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153 COpaqueDataParse *parse = NULL; |
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154 TRAPD(error, parse = COpaqueDataParse::NewL(impData.OpaqueData())); |
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155 if (error != KErrNone) |
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156 { |
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157 if (error==KErrNotSupported) |
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158 continue; |
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159 else |
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160 User::Leave(error); |
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161 } |
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162 CleanupStack::PushL(parse); |
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163 |
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164 // we can assume the version is valid as it is checked in |
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165 // COpaqueDataParse::ConstructL() which leaves if not valid |
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166 ASSERT(parse->Version() <= KIclPluginFrameworkVersionMax); |
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167 |
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168 if (!impData.Disabled() && !parse->OnlyUidsAvail()) |
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169 { |
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170 if(matchImageData) |
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171 {// match image data |
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172 TInt matchLevel = 0; |
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173 if (CImageConversionResolverUtils::Match(aImageData, impData.DataType(), matchLevel)) |
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174 { |
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175 TInt error = KErrNone; |
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176 // do we need to create a decoder to fully verify the header data ? |
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177 if (parse->IsOpenNeededToRecognize()) |
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178 { |
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179 CImageDecoder* decoder = NULL; |
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180 TRAP(error, decoder = CImageDecoder::DataNewL(iFs, aImageData)); |
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181 delete decoder; |
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182 if (error==KErrNoMemory) // handle OOM, but assume everything else is a do not recognize |
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183 User::Leave(KErrNoMemory); |
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184 else if (error==KErrUnderflow && aImageData.Length()>=KImageHeaderSize) |
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185 { |
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186 // assuming we have enough data, means the format requires more |
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187 // might as well assume OK |
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188 error=KErrNone; |
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189 } |
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190 } |
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191 if(error == KErrNone && oldMatchLevel < matchLevel) |
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192 { |
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193 // either found a match or a better match |
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194 oldMatchLevel = matchLevel; |
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195 parse->EnsureMIMETypesReadL(); |
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196 aMimeType = (parse->MIMETypesCount()==0) ? KNullDesC8() : parse->MIMEType(0); |
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197 } |
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198 } |
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199 } |
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200 else |
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201 {// match file extension |
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202 ASSERT(!matchImageData); |
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203 ASSERT(fileSuffix!=NULL); |
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204 |
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205 if(parse->IsRecognizeAgainstSuffix()) |
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206 { //If codec has file extensions and allow matching on them |
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207 parse->EnsureExtnsReadL(); |
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208 const TInt numExtns = parse->ExtnsCount(); |
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209 for (TInt index2 = 0; index2 < numExtns; index2++) |
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210 { |
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211 const TDesC8& extn = parse->Extn(index2); |
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212 if (COpaqueDataParse::CompareFileSuffixL(*fileSuffix, extn)) |
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213 { |
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214 // return the first MIME type listed for this plugin |
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215 matchFound = ETrue; |
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216 parse->EnsureMIMETypesReadL(); |
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217 aMimeType = (parse->MIMETypesCount()==0) ? KNullDesC8() : parse->MIMEType(0); |
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218 break; |
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219 } |
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220 } |
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221 } |
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222 } |
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223 } |
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224 CleanupStack::PopAndDestroy(parse); |
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225 } |
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226 |
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227 if(oldMatchLevel>0) |
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228 { |
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229 // looked at all plugins now |
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230 // return the best MIME type listed for this plugin |
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231 matchFound = ETrue; |
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232 } |
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233 |
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234 if(!matchImageData) |
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235 CleanupStack::PopAndDestroy(fileSuffix); |
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236 |
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237 return matchFound; |
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238 } |
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239 |
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240 |
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241 // Static factory constructor. Uses two phase |
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242 // construction and leaves nothing on the cleanup stack |
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243 // |
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244 // @leave KErrNoMemory |
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245 // @return A pointer to the newly created CIclRecognizerUtil::CBody object |
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246 // |
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247 CIclRecognizerUtil::CBody* CIclRecognizerUtil::CBody::NewL() |
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248 { |
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249 CBody* self=new (ELeave) CBody(); |
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250 CleanupStack::PushL(self); |
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251 self->ConstructL(); |
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252 CleanupStack::Pop(self); |
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253 return self; |
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254 } |
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255 |