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1 /* |
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2 * Copyright (c) 2007-2009 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: Reads metadata from rtp clip meta header |
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15 * |
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16 */ |
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17 |
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18 #include "harvesterrtpmetadatareader.h" |
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19 #include "harvesterrtpplugin.h" |
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20 #include "harvesterlog.h" |
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21 |
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22 _LIT( KTxtSpace, " "); |
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23 |
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24 // ======== MEMBER FUNCTIONS ======== |
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25 |
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26 // --------------------------------------------------------------------------- |
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27 // Constructor |
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28 // --------------------------------------------------------------------------- |
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29 // |
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30 CHarvesterRtpMetaDataReader* CHarvesterRtpMetaDataReader::NewL( |
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31 const TDesC8* aFileBuffer ) |
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32 { |
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33 CHarvesterRtpMetaDataReader* self = |
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34 new( ELeave ) CHarvesterRtpMetaDataReader( aFileBuffer ); |
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35 CleanupStack::PushL( self ); |
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36 self->ConstructL(); |
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37 CleanupStack::Pop( self ); |
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38 return self; |
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39 } |
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40 |
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41 // --------------------------------------------------------------------------- |
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42 // Destructor |
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43 // --------------------------------------------------------------------------- |
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44 // |
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45 CHarvesterRtpMetaDataReader::~CHarvesterRtpMetaDataReader() |
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46 { |
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47 WRITELOG( "CHarvesterRtpMetaDataReader::~CHarvesterRtpMetaDataReader()" ); |
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48 delete iMetaData; |
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49 } |
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50 |
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51 // --------------------------------------------------------------------------- |
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52 // Read details from meta header |
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53 // --------------------------------------------------------------------------- |
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54 // |
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55 void CHarvesterRtpMetaDataReader::GetClipDetailsL( |
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56 CHarvesterRtpClipDetails& aDetails ) |
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57 { |
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58 WRITELOG( "CHarvesterRtpMetaDataReader::GetClipDetailsL()" ); |
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59 |
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60 // Attributes |
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61 TPtrC8 bytes( iDataPtr.Mid( KAttributesPoint, KIntegerBytes ) ); |
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62 TUint data( 0 ); |
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63 User::LeaveIfError( GetValue( bytes, data ) ); |
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64 |
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65 // Recording quality |
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66 aDetails.iQuality = |
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67 ( TUint8 )( ( data >> KQualityFieldShift ) & KMaxTUint8 ); |
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68 //Recording ongoing |
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69 aDetails.iRecOngoing = |
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70 ( data >> KOngoingFlagShift ) & ETrue; |
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71 // Recording completed |
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72 aDetails.iRecCompleted = |
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73 ( data >> KCompletedFlagShift ) & ETrue; |
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74 //Recording failed |
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75 aDetails.iRecFailed = |
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76 ( data >> KFailedFlagShift ) & ETrue; |
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77 //Parental rate |
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78 aDetails.iParental = |
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79 ( TUint8 )( ( data >> KParentalFieldShift ) & KMaxTUint8 ); |
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80 // Post rule |
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81 TUint8 postRule = |
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82 ( TUint8 )( ( data >> KPostRuleFieldShift ) & KMaxTUint8 ); |
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83 |
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84 if ( postRule == KContentRightsLockToDevice ) |
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85 { |
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86 aDetails.iPostRule = ETrue; |
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87 } |
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88 else |
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89 { |
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90 aDetails.iPostRule = EFalse; |
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91 } |
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92 |
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93 // Duration |
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94 TUint duration( 0 ); |
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95 TPtrC8 durationBytes ( iDataPtr.Mid( KDurationPoint, KIntegerBytes ) ); |
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96 User::LeaveIfError( GetValue( durationBytes, duration ) ); |
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97 duration /= 1000; //Convert to seconds |
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98 aDetails.iDuration = static_cast<TReal32>( duration ); |
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99 |
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100 // Title |
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101 GetProgramTitleL( aDetails.iTitle ); |
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102 } |
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103 |
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104 // --------------------------------------------------------------------------- |
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105 // Default constructor |
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106 // --------------------------------------------------------------------------- |
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107 // |
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108 CHarvesterRtpMetaDataReader::CHarvesterRtpMetaDataReader( |
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109 const TDesC8* aFileBuffer ) |
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110 : iMetaTotal( KErrNotFound ), |
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111 iMetaData( NULL ), |
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112 iDataPtr( 0, 0 ), |
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113 iEsgDataPoint ( KErrNotFound ), |
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114 iFileBuffer( aFileBuffer ) |
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115 { |
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116 // None |
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117 } |
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118 |
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119 // --------------------------------------------------------------------------- |
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120 // 2nd phase constructor |
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121 // --------------------------------------------------------------------------- |
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122 // |
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123 void CHarvesterRtpMetaDataReader::ConstructL() |
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124 { |
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125 WRITELOG( "CHarvesterRtpMetaDataReader::ConstructL()" ); |
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126 TPtrC8 bytes; |
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127 |
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128 if ( iFileBuffer |
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129 && iFileBuffer->Length() > KIntegerBytes ) |
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130 { |
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131 // Read whole meta area |
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132 bytes.Set( iFileBuffer->Mid( KMetaLengthPoint, KIntegerBytes ) ); |
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133 } |
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134 |
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135 TUint value ( 0 ); |
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136 User::LeaveIfError( GetValue( bytes, value ) ); |
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137 |
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138 iMetaTotal = value; |
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139 |
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140 if ( iMetaTotal > KMaxMetaHeaderLength || iMetaTotal <= 0 ) |
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141 { |
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142 //Length not reasonable, metadata corrupted |
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143 WRITELOG( "CHarvesterRtpMetaDataReader - metadata corrupted, leave!" ); |
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144 User::Leave( KErrCorrupt ); |
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145 } |
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146 |
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147 iMetaData = HBufC8::NewL( iMetaTotal ); |
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148 *iMetaData = iFileBuffer->Mid( KMetaLengthPoint, iMetaTotal ); |
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149 |
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150 iDataPtr.Set( iMetaData->Des() ); |
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151 |
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152 // Check that all data exist in meta header |
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153 if ( iDataPtr.Length() < iMetaTotal ) |
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154 { |
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155 //Meta header corrupted |
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156 WRITELOG( "CHarvesterRtpMetaDataReader - metaheader corrupted, leave!" ); |
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157 User::Leave( KErrCorrupt ); |
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158 } |
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159 |
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160 // ESG data point ( device info point + device info data ) |
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161 iEsgDataPoint = KDeviceInfoPoint + KStringLengthBytes + |
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162 iDataPtr[KDeviceInfoPoint]; |
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163 |
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164 } |
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165 |
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166 // ----------------------------------------------------------------------------- |
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167 // Reads data with length info of meta header from the clip |
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168 // ----------------------------------------------------------------------------- |
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169 // |
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170 void CHarvesterRtpMetaDataReader::ReadStringDataL( |
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171 const TInt aPosition, |
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172 TPtrC8& aData ) |
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173 { |
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174 WRITELOG( "CHarvesterRtpMetaDataReader::ReadStringDataL()" ); |
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175 |
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176 if ( aPosition < 0 |
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177 || aPosition > iDataPtr.Length() ) |
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178 { |
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179 WRITELOG( "CHarvesterRtpMetaDataReader - KErrArgument, leave!" ); |
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180 User::Leave( KErrArgument ); |
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181 } |
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182 |
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183 const TInt len( iDataPtr[aPosition] ); |
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184 |
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185 if ( len < 0 |
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186 || len > TInt( KMaxTUint8 ) ) |
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187 { |
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188 WRITELOG( "CHarvesterRtpMetaDataReader - KErrCorrupt, leave!" ); |
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189 User::Leave( KErrCorrupt ); |
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190 } |
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191 |
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192 aData.Set( iDataPtr.Mid( aPosition + KStringLengthBytes, len ) ); |
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193 } |
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194 |
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195 // ----------------------------------------------------------------------------- |
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196 // Get value |
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197 // ----------------------------------------------------------------------------- |
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198 // |
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199 TInt CHarvesterRtpMetaDataReader::GetValue( |
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200 const TDesC8& aBytes, |
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201 TUint& aValue ) |
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202 { |
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203 WRITELOG( "CHarvesterRtpMetaDataReader::GetValue()" ); |
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204 if ( aBytes.Length() >= KIntegerBytes ) |
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205 { |
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206 aValue = ( TUint )( aBytes[0] ); |
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207 aValue <<= 8; |
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208 aValue |= ( TUint )( aBytes[1] ); |
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209 aValue <<= 8; |
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210 aValue |= ( TUint )( aBytes[2] ); |
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211 aValue <<= 8; |
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212 aValue |= ( TUint )( aBytes[3] ); |
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213 return KErrNone; |
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214 } |
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215 |
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216 WRITELOG( "CHarvesterRtpMetaDataReader::GetValue() : KErrUnderFlow!" ); |
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217 return KErrUnderflow; |
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218 } |
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219 |
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220 // ----------------------------------------------------------------------------- |
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221 // Get and format clip title |
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222 // ----------------------------------------------------------------------------- |
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223 // |
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224 void CHarvesterRtpMetaDataReader::GetProgramTitleL( TDes& aTitle ) |
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225 { |
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226 WRITELOG( "CHarvesterRtpMetaDataReader::GetProgramTitleL()" ); |
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227 |
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228 User::LeaveIfError( iEsgDataPoint ); |
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229 aTitle.Zero(); |
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230 |
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231 TUint32 totalLength( 0 ); |
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232 TPtrC8 service; |
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233 TPtrC8 program; |
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234 |
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235 ReadStringDataL( iEsgDataPoint, service ); |
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236 |
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237 totalLength += service.Length(); |
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238 totalLength += KSpaceLength; |
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239 |
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240 // Program name |
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241 const TInt progPos( iEsgDataPoint + KStringLengthBytes + service.Length() ); |
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242 ReadStringDataL( progPos, program ); |
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243 |
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244 totalLength += program.Length(); |
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245 |
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246 HBufC8* title = HBufC8::NewLC( totalLength ); |
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247 title->Des().Append( service.Ptr(), service.Length() ); |
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248 title->Des().Append( KTxtSpace ); |
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249 title->Des().Append( program.Ptr(), program.Length() ); |
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250 |
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251 if ( totalLength > KMaxProgramTitle ) |
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252 { |
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253 //Make title fit in max title length |
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254 TPtrC8 titlePtr( *title ); |
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255 aTitle.Copy( titlePtr.Mid( 0 , KMaxProgramTitle ) ); |
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256 } |
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257 else |
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258 { |
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259 aTitle.Copy( *title ); |
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260 } |
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261 |
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262 CleanupStack::PopAndDestroy( title ); |
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263 } |
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264 |