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1 // Copyright (c) 2002-2009 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 // |
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15 |
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16 #include <mmf/common/mmfcontrollerpluginresolver.h> |
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17 #include <mmf/server/mmfdatabuffer.h> |
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18 #include <mmf/common/mmfutilities.h> |
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19 #include <mmf/server/Mmfclip.h> |
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20 #include <mmf/server/MmfFile.h> |
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21 #include <mmf/server/mmfformat.h> |
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22 |
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23 //static const TUid KUidMmfPluginInterfaceFormatDecode = {KMmfUidPluginInterfaceFormatDecode}; |
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24 //static const TUid KUidMmfPluginInterfaceFormatEncode = {KMmfUidPluginInterfaceFormatEncode}; |
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25 |
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26 const TInt KMmfHeaderBufferSize = 512 ; //512 bytes read to parse the header |
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27 |
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28 CMMFFormatDecode* CMMFFormatDecode::CreateFormatL(TUid aUid, MDataSource* aSource) |
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29 { |
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30 CMMFFormatDecode* s = REINTERPRET_CAST( CMMFFormatDecode*, |
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31 REComSession::CreateImplementationL( aUid, _FOFF( CMMFFormatDecode, iDtor_ID_Key), |
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32 STATIC_CAST( TAny*, aSource ) ) ) ; |
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33 s->iImplementationUid = aUid; |
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34 return s; |
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35 } |
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36 |
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37 /** |
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38 Allocates and constructs an ECom format decode object. |
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39 |
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40 This is used to explicitly instantiate a format decoder where the UID is known. This method might |
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41 be used by controllers that only support one type of format such that the UID of the format is |
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42 already known. For example, if an mp3 controller has been instantiated, there is no need for any |
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43 further format recognition as this has already been performed in the controller instantiation, thus |
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44 the controller can instantiate an mp3 format directly from it’s UID. |
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45 |
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46 @param aUid |
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47 The implementation UID. This is used by Com to create the plugin. |
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48 @param aSource |
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49 The controller MDataSource and is the source of the data for the format decode plugin. The |
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50 format decode plugin is the sink of data for the MDataSource. |
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51 |
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52 @return If successful, returns the address of the format decode plugin object created. If not successful, |
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53 leaves with KErrNotFound. |
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54 */ |
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55 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( TUid aUid, MDataSource* aSource ) |
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56 { |
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57 return CreateFormatL(aUid, aSource); |
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58 } |
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59 |
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60 |
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61 |
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62 /** |
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63 Attempt to locate and instantiate a FormatDecode using a filename or an extension. |
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64 |
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65 Only the extension is used. If no extension is supplied (no dot is present) the whole of the |
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66 filename will be treated as the extension. |
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67 |
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68 If the file already exists, the file header is scanned to find a match in the opaque_data field of |
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69 the resource file. |
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70 |
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71 @param aFileName |
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72 The file name of target file. May be extension only or may include full path. |
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73 @param aSource |
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74 The controller's MDataSource. This is the source of the data for the format decode plugin. This must |
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75 be a CMMFFile source when instantiating a CMMFFormatDecode using a file name. |
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76 @param aPreferredSupplier |
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77 If this is provided the list of matching plugins will be further searched for the latest version of a |
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78 plugin supplied by supplier named. |
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79 |
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80 @return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound. |
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81 */ |
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82 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC16& aFileName, MDataSource* aSource, const TDesC& aPreferredSupplier ) |
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83 { |
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84 CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC(); |
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85 CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC(); |
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86 formatParams->SetMatchToFileNameL(aFileName); |
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87 pluginSelector->SetRequiredFormatSupportL(*formatParams); |
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88 if (aPreferredSupplier.Length() > 0) |
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89 pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned); |
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90 |
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91 // Instantiate this format |
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92 CMMFFormatDecode* theChosenOne = |
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93 MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource); |
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94 |
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95 // Now clean up. |
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96 CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector |
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97 |
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98 return theChosenOne; |
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99 } |
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100 |
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101 /** |
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102 Attempt to locate and instantiate a FormatDecode using a filename or an extension. |
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103 |
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104 Only the extension is used. If no extension is supplied (no dot is present) the whole of the |
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105 filename will be treated as the extension. |
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106 |
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107 If the file already exists, the file header is scanned to find a match in the opaque_data field of |
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108 the resource file. |
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109 |
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110 @param aFileName |
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111 The file name of target file. May be extension only or may include full path. |
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112 @param aSource |
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113 The controller's MDataSource. This is the source of the data for the format decode plugin. This must |
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114 be a CMMFFile source when instantiating a CMMFFormatDecode using a file name. |
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115 @param aPreferredSupplier |
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116 If this is provided the list of matching plugins will be further searched for the latest version of a |
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117 plugin supplied by supplier named. |
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118 @param aSupportsCustomInterfaces |
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119 Indicates whether the instantiated FormatDecode supports custom interfaces. |
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120 |
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121 @return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound. |
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122 */ |
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123 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC16& aFileName, MDataSource* aSource, const TDesC& aPreferredSupplier, TBool& aSupportsCustomInterfaces ) |
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124 { |
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125 CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC(); |
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126 CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC(); |
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127 formatParams->SetMatchToFileNameL(aFileName); |
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128 pluginSelector->SetRequiredFormatSupportL(*formatParams); |
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129 if (aPreferredSupplier.Length() > 0) |
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130 pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned); |
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131 |
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132 // Instantiate this format |
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133 CMMFFormatDecode* theChosenOne = |
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134 MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource, aSupportsCustomInterfaces); |
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135 |
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136 // Now clean up. |
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137 CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector |
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138 |
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139 return theChosenOne; |
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140 } |
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141 |
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142 |
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143 /** |
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144 Attempts to locate and instantiate a CMMFFormatDecode using data in a buffer. The buffer is expected to contain |
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145 header data (from a file, stream or descriptor). |
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146 |
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147 Signatures (supplied by the plugin registry information) are sought in aSourceHeader. |
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148 |
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149 This function uses the match string as a resolver parameter. The format base class uses the match string |
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150 to find a match to the match string defined in the opaque_data field of the resource file. The |
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151 match string would typically be a signature for a particular format usually defined in the format header. |
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152 |
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153 @param aSourceHeader |
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154 The data which is searched for matching signatures. |
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155 @param aSource |
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156 The controller's MDataSource and the source of the data for the format decode plugin. |
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157 @param aPreferredSupplier |
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158 If this is provided the list of matching plugins will be further searched for the latest version of a |
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159 plugin supplied by the specified supplier. |
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160 |
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161 @return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound. |
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162 */ |
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163 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC8& aSourceHeader, MDataSource* aSource, const TDesC& aPreferredSupplier ) |
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164 { |
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165 CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC(); |
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166 CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC(); |
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167 formatParams->SetMatchToHeaderDataL(aSourceHeader); |
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168 pluginSelector->SetRequiredFormatSupportL(*formatParams); |
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169 if (aPreferredSupplier.Length() > 0) |
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170 pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned); |
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171 |
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172 // Instantiate this format |
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173 CMMFFormatDecode* theChosenOne = |
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174 MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource); |
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175 |
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176 // Now clean up. |
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177 CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector |
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178 |
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179 return theChosenOne; |
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180 } |
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181 |
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182 /** |
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183 Attempts to locate and instantiate a CMMFFormatDecode using data in a buffer. The buffer is expected to contain |
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184 header data (from a file, stream or descriptor). |
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185 |
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186 Signatures (supplied by the plugin registry information) are sought in aSourceHeader. |
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187 |
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188 This function uses the match string as a resolver parameter. The format base class uses the match string |
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189 to find a match to the match string defined in the opaque_data field of the resource file. The |
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190 match string would typically be a signature for a particular format usually defined in the format header. |
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191 |
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192 @param aSourceHeader |
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193 The data which is searched for matching signatures. |
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194 @param aSource |
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195 The controller's MDataSource and the source of the data for the format decode plugin. |
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196 @param aPreferredSupplier |
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197 If this is provided the list of matching plugins will be further searched for the latest version of a |
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198 plugin supplied by the specified supplier. |
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199 @param aSupportsCustomInterfaces |
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200 Indicates whether the instantiated FormatDecode supports custom interfaces. |
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201 |
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202 @return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound. |
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203 */ |
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204 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( const TDesC8& aSourceHeader, MDataSource* aSource, const TDesC& aPreferredSupplier, TBool& aSupportsCustomInterfaces ) |
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205 { |
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206 CMMFFormatDecodePluginSelectionParameters* pluginSelector = CMMFFormatDecodePluginSelectionParameters::NewLC(); |
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207 CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC(); |
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208 formatParams->SetMatchToHeaderDataL(aSourceHeader); |
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209 pluginSelector->SetRequiredFormatSupportL(*formatParams); |
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210 if (aPreferredSupplier.Length() > 0) |
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211 pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned); |
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212 |
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213 // Instantiate this format |
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214 CMMFFormatDecode* theChosenOne = |
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215 MMFFormatEcomUtilities::SelectFormatDecodePluginL(*pluginSelector, aSource, aSupportsCustomInterfaces); |
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216 |
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217 // Now clean up. |
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218 CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector |
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219 |
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220 return theChosenOne; |
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221 } |
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222 |
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223 /** |
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224 Attempts to locate and instantiate a CMMFFormatDecode using data from MDataSource. |
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225 |
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226 The data is expected to contain header data (from a file, stream or descriptor). Signatures |
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227 (supplied by the plugin registry information) are sought in aSource. |
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228 |
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229 @param aSource |
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230 Header data. Must be derived from CMMFClip. |
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231 @param aPreferredSupplier |
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232 If this is provided, the list of matching plugins will be further searched for the latest version of a |
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233 plugin supplied by the specified supplier. |
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234 |
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235 @return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound. |
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236 */ |
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237 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( MDataSource* aSource, const TDesC& aPreferredSupplier ) |
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238 { |
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239 // Read header data from aSource. Call source header version |
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240 |
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241 if ( !( (aSource->DataSourceType() == KUidMmfFileSource ) || ( aSource->DataSourceType() == KUidMmfDescriptorSource) ) ) |
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242 User::Leave( KErrNotSupported ) ; |
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243 |
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244 CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(KMmfHeaderBufferSize) ; |
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245 CleanupStack::PushL( buffer ) ; |
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246 |
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247 aSource->SourcePrimeL(); |
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248 TCleanupItem srcCleanupItem(DoDataSourceStop, aSource); |
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249 CleanupStack::PushL(srcCleanupItem); |
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250 |
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251 STATIC_CAST( CMMFClip*, aSource )->ReadBufferL( buffer, 0 ) ; |
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252 |
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253 CleanupStack::Pop(); |
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254 aSource->SourceStopL(); |
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255 |
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256 // attempt to instantiate the format by header data |
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257 // if this fails, try using the file extension |
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258 CMMFFormatDecode* ret = NULL; |
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259 TInt err, errFile; |
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260 TRAP(err, ret = NewL( buffer->Data(), aSource, aPreferredSupplier )); |
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261 if (err != KErrNone && aSource->DataSourceType() == KUidMmfFileSource) |
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262 { |
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263 CMMFFile* mmfFile = static_cast<CMMFFile*> (aSource); |
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264 TRAP(errFile, ret = NewL( mmfFile->FullName(), aSource, aPreferredSupplier )); |
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265 if (errFile == KErrNone) |
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266 err = errFile; |
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267 } |
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268 User::LeaveIfError(err); |
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269 |
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270 CleanupStack::PopAndDestroy() ; // buffer |
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271 return ret ; |
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272 |
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273 } |
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274 |
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275 /** |
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276 Attempts to locate and instantiate a CMMFFormatDecode using data from MDataSource. |
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277 |
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278 The data is expected to contain header data (from a file, stream or descriptor). Signatures |
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279 (supplied by the plugin registry information) are sought in aSource. |
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280 |
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281 @param aSource |
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282 Header data. Must be derived from CMMFClip. |
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283 @param aPreferredSupplier |
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284 If this is provided, the list of matching plugins will be further searched for the latest version of a |
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285 plugin supplied by the specified supplier. |
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286 @param aSupportsCustomInterfaces |
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287 Indicates whether the instantiated FormatDecode supports custom interfaces. |
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288 |
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289 @return If successful returns an instantiated CMMFFormatDecode from a plugin. If not successful, leaves with KErrNotFound. |
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290 */ |
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291 EXPORT_C CMMFFormatDecode* CMMFFormatDecode::NewL( MDataSource* aSource, const TDesC& aPreferredSupplier, TBool& aSupportsCustomInterfaces ) |
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292 { |
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293 // Read header data from aSource. Call source header version |
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294 |
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295 if ( !( (aSource->DataSourceType() == KUidMmfFileSource ) || ( aSource->DataSourceType() == KUidMmfDescriptorSource) ) ) |
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296 User::Leave( KErrNotSupported ) ; |
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297 |
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298 CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(KMmfHeaderBufferSize) ; |
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299 CleanupStack::PushL( buffer ) ; |
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300 |
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301 aSource->SourcePrimeL(); |
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302 TCleanupItem srcCleanupItem(DoDataSourceStop, aSource); |
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303 CleanupStack::PushL(srcCleanupItem); |
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304 |
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305 STATIC_CAST( CMMFClip*, aSource )->ReadBufferL( buffer, 0 ) ; |
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306 |
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307 CleanupStack::Pop(); |
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308 aSource->SourceStopL(); |
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309 |
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310 // attempt to instantiate the format by header data |
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311 // if this fails, try using the file extension |
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312 CMMFFormatDecode* ret = NULL; |
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313 TInt err, errFile; |
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314 TRAP(err, ret = NewL( buffer->Data(), aSource, aPreferredSupplier, aSupportsCustomInterfaces )); |
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315 if (err != KErrNone && aSource->DataSourceType() == KUidMmfFileSource) |
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316 { |
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317 CMMFFile* mmfFile = static_cast<CMMFFile*> (aSource); |
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318 TRAP(errFile, ret = NewL( mmfFile->FullName(), aSource, aPreferredSupplier, aSupportsCustomInterfaces )); |
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319 if (errFile == KErrNone) |
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320 err = errFile; |
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321 } |
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322 User::LeaveIfError(err); |
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323 |
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324 CleanupStack::PopAndDestroy() ; // buffer |
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325 return ret ; |
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326 |
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327 } |
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328 |
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329 CMMFFormatEncode* CMMFFormatEncode::CreateFormatL(TUid aUid, MDataSink* aSink) |
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330 { |
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331 CMMFFormatEncode* s = REINTERPRET_CAST( CMMFFormatEncode*, |
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332 REComSession::CreateImplementationL( aUid, _FOFF( CMMFFormatEncode, iDtor_ID_Key ), |
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333 STATIC_CAST( TAny*, aSink ) ) ) ; |
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334 s->iImplementationUid = aUid; |
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335 return s; |
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336 } |
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337 |
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338 /** |
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339 Allocates and constructs an ECom format encode object. |
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340 |
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341 @param aUid |
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342 The implementation UID. |
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343 @param aSink |
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344 The data sink. |
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345 |
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346 @return If successful, returns the address of the format decode plugin object created. If not successful, |
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347 leaves with KErrNotFound. |
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348 */ |
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349 EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( TUid aUid, MDataSink* aSink ) |
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350 { |
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351 return CreateFormatL(aUid, aSink); |
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352 } |
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353 |
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354 /** |
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355 Attempts to locate and instantiate a CMMFFormatEncode using a filename or an extension. |
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356 |
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357 Only the extension of the supplied file name is used. If no extension is supplied (ie. no dot is present) |
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358 the whole of the filename will be treated as the extension. |
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359 |
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360 @param aFileName |
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361 File name of target file. May be extension only or may include the full path. |
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362 @param aSink |
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363 The data source. |
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364 @param aPreferredSupplier |
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365 If this is provided, the list of matching plugins will be further searched for the latest version of a |
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366 plugin supplied by supplier named. |
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367 |
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368 @return If successful, returns the address of the format decode plugin object created. If not successful, |
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369 leaves with KErrNotFound. |
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370 */ |
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371 EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( const TDesC16& aFileName, MDataSink* aSink, const TDesC& aPreferredSupplier ) |
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372 { |
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373 CMMFFormatEncodePluginSelectionParameters* pluginSelector = CMMFFormatEncodePluginSelectionParameters::NewLC(); |
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374 CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC(); |
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375 formatParams->SetMatchToFileNameL(aFileName); |
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376 pluginSelector->SetRequiredFormatSupportL(*formatParams); |
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377 if (aPreferredSupplier.Length() > 0) |
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378 pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned); |
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379 |
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380 TUid chosenUid = MMFFormatEcomUtilities::SelectFormatPluginL(*pluginSelector); |
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381 |
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382 // Instantiate this format |
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383 CMMFFormatEncode* theChosenOne = CreateFormatL(chosenUid, aSink); |
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384 |
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385 // Now clean up. |
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386 CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector |
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387 |
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388 return theChosenOne; |
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389 } |
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390 |
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391 /** |
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392 Attempts to locate and instantiate a CMMFFormatEncode using data in the specified buffer. |
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393 |
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394 The buffer is expected to contain header data (from a file, stream or descriptor). |
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395 Signatures (supplied by the plugin registry information) are sought in aSourceHeader. |
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396 |
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397 @param aSourceHeader |
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398 The data which is searched for matching signatures. |
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399 @param aSink |
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400 The data sink. |
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401 @param aPreferredSupplier |
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402 If this is provided the list of matching plugins will be further searched for the latest version of a |
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403 plugin supplied by supplier named. |
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404 |
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405 @return If successful, returns the address of the format decode plugin object created. If not successful, |
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406 leaves with KErrNotFound. |
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407 */ |
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408 EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( const TDesC8& aSourceHeader, MDataSink* aSink, const TDesC& aPreferredSupplier ) |
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409 { |
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410 CMMFFormatEncodePluginSelectionParameters* pluginSelector = CMMFFormatEncodePluginSelectionParameters::NewLC(); |
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411 CMMFFormatSelectionParameters* formatParams = CMMFFormatSelectionParameters::NewLC(); |
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412 formatParams->SetMatchToHeaderDataL(aSourceHeader); |
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413 pluginSelector->SetRequiredFormatSupportL(*formatParams); |
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414 if (aPreferredSupplier.Length() > 0) |
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415 pluginSelector->SetPreferredSupplierL(aPreferredSupplier, CMMFPluginSelectionParameters::EOnlyPreferredSupplierPluginsReturned); |
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416 |
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417 TUid chosenUid = MMFFormatEcomUtilities::SelectFormatPluginL(*pluginSelector); |
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418 |
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419 // Instantiate this format |
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420 CMMFFormatEncode* theChosenOne = CreateFormatL(chosenUid, aSink); |
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421 |
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422 // Now clean up. |
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423 CleanupStack::PopAndDestroy(2);//formatParams, pluginSelector |
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424 |
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425 return theChosenOne; |
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426 } |
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427 |
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428 /** |
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429 Attempts to locate and instantiate a CMMFFormatEncode using data from aSink. |
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430 |
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431 The data is expected to contain header data (from a file, stream or descriptor). |
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432 Signatures (supplied by the plugin registry information) are sought in the source header. |
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433 |
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434 @param aSink |
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435 The header data. Must be derived from CMMFClip. |
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436 @param aPreferredSupplier |
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437 If this is provided, the list of matching plugins will be further searched for the latest version of a |
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438 plugin supplied by supplier specified. |
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439 |
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440 @return If successful, returns the address of the format decode plugin object created. If not successful, |
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441 leaves with KErrNotFound. |
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442 */ |
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443 EXPORT_C CMMFFormatEncode* CMMFFormatEncode::NewL( MDataSink* aSink, const TDesC& aPreferredSupplier ) |
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444 { |
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445 // Read header data from aSource. Call source header version if there is header data, file name version otherwise. |
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446 |
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447 if ( !( (aSink->DataSinkType() == KUidMmfFileSink ) || ( aSink->DataSinkType() == KUidMmfDescriptorSink) ) ) |
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448 User::Leave( KErrNotSupported ) ; |
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449 |
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450 CMMFDataBuffer* buffer = CMMFDataBuffer::NewL(KMmfHeaderBufferSize) ; |
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451 CleanupStack::PushL( buffer ) ; |
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452 |
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453 aSink->SinkPrimeL(); |
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454 TCleanupItem sinkCleanupItem(DoDataSinkStop, aSink); |
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455 CleanupStack::PushL(sinkCleanupItem); |
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456 |
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457 STATIC_CAST( CMMFClip*, aSink )->ReadBufferL( buffer, 0 ) ; |
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458 |
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459 CleanupStack::Pop(); |
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460 aSink->SinkStopL(); |
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461 |
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462 CMMFFormatEncode* ret = NULL ; // set to null to avoid compiler warning. |
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463 // Check for data in the buffer |
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464 if ( buffer->BufferSize() != 0 ) |
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465 ret = NewL( buffer->Data(), aSink, aPreferredSupplier ) ; |
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466 else if ( aSink->DataSinkType() == KUidMmfFileSink ) |
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467 ret = NewL( STATIC_CAST(CMMFFile*, aSink)->Extension(), aSink, aPreferredSupplier ) ; |
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468 else |
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469 User::Leave( KErrNotSupported ) ; |
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470 |
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471 CleanupStack::PopAndDestroy() ; // buffer |
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472 return ret ; |
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473 } |
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474 |
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475 |
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476 TUid MMFFormatEcomUtilities::SelectFormatPluginL(const CMMFFormatPluginSelectionParameters& aSelectParams) |
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477 { |
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478 RMMFFormatImplInfoArray pluginArray; |
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479 CleanupResetAndDestroyPushL(pluginArray); |
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480 aSelectParams.ListImplementationsL(pluginArray); |
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481 |
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482 // Just leave if no implementations were found |
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483 if (pluginArray.Count() == 0) |
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484 User::Leave(KErrNotSupported); |
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485 |
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486 // Return the uid of the first plugin in the list |
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487 TUid ret = pluginArray[0]->Uid(); |
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488 CleanupStack::PopAndDestroy();//pluginArray |
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489 return ret; |
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490 } |
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491 |
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492 /* |
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493 * instantiate each format decode plugin in turn until we find one that works |
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494 */ |
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495 CMMFFormatDecode* MMFFormatEcomUtilities::SelectFormatDecodePluginL(const CMMFFormatPluginSelectionParameters& aSelectParams, MDataSource* aSource) |
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496 { |
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497 RMMFFormatImplInfoArray pluginArray; |
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498 CleanupResetAndDestroyPushL(pluginArray); |
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499 aSelectParams.ListImplementationsL(pluginArray); |
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500 |
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501 TInt pluginCount = pluginArray.Count(); |
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502 CMMFFormatDecode* theChosenOne = NULL; |
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503 |
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504 TInt err = KErrNotSupported; |
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505 for (TInt n=0; n<pluginCount; n++) |
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506 { |
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507 // Try to instantiate this format |
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508 TRAP(err, theChosenOne = CMMFFormatDecode::NewL(pluginArray[n]->Uid(), aSource)); |
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509 // Ensure OOM or any unexpected error is caught immediately |
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510 // i.e. don't try the next plugin |
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511 if (err != KErrNotSupported && err != KErrCorrupt && err != KErrArgument) |
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512 break; |
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513 } |
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514 User::LeaveIfError(err); |
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515 |
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516 CleanupStack::PopAndDestroy(&pluginArray); |
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517 |
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518 return theChosenOne; |
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519 } |
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520 |
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521 /* |
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522 * instantiate each format decode plugin in turn until we find one that works |
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523 */ |
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524 CMMFFormatDecode* MMFFormatEcomUtilities::SelectFormatDecodePluginL(const CMMFFormatPluginSelectionParameters& aSelectParams, MDataSource* aSource, TBool& aSupportsCustomInterfaces) |
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525 { |
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526 RMMFFormatImplInfoArray pluginArray; |
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527 CleanupResetAndDestroyPushL(pluginArray); |
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528 aSelectParams.ListImplementationsL(pluginArray); |
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529 |
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530 TInt pluginCount = pluginArray.Count(); |
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531 CMMFFormatDecode* theChosenOne = NULL; |
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532 |
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533 TInt err = KErrNotSupported; |
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534 CMMFFormatImplementationInformation* implInfo = NULL; |
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535 for (TInt n=0; n<pluginCount; n++) |
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536 { |
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537 implInfo = pluginArray[n]; |
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538 // Try to instantiate this format |
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539 TRAP(err, theChosenOne = CMMFFormatDecode::NewL(implInfo->Uid(), aSource)); |
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540 // Ensure OOM or any unexpected error is caught immediately |
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541 // i.e. don't try the next plugin |
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542 if (err != KErrNotSupported && err != KErrCorrupt && err != KErrArgument) |
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543 break; |
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544 } |
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545 User::LeaveIfError(err); |
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546 aSupportsCustomInterfaces = implInfo->SupportsCustomInterfaces(); |
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547 |
|
548 CleanupStack::PopAndDestroy(&pluginArray); |
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549 |
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550 return theChosenOne; |
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551 } |
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552 |