1 // Copyright (c) 2008-2009 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 /** |
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17 @file |
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18 @publishedAll |
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19 @released |
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20 */ |
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21 |
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22 #include <bluetooth/logger.h> |
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23 #include <remcon/avrcpspec.h> |
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24 #include <remconmediainformationtarget.h> |
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25 #include <remconmediainformationtargetobserver.h> |
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26 #include <remconinterfaceselector.h> |
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27 #include <avcframe.h> |
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28 |
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29 #include "mediainformation.h" |
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30 |
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31 #ifdef __FLOG_ACTIVE |
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32 _LIT8(KLogComponent, LOG_COMPONENT_AVRCP_MEDIA_INFO); |
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33 #endif |
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34 |
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35 EXPORT_C CRemConMediaInformationTarget* CRemConMediaInformationTarget::NewL(CRemConInterfaceSelector& aInterfaceSelector, |
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36 MRemConMediaInformationTargetObserver& aObserver) |
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37 { |
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38 LOG_STATIC_FUNC |
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39 |
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40 CRemConMediaInformationTarget* self = new(ELeave) CRemConMediaInformationTarget(aInterfaceSelector, aObserver); |
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41 CleanupStack::PushL(self); |
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42 self->ConstructL(); |
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43 CleanupStack::Pop(self); |
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44 return self; |
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45 } |
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46 |
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47 CRemConMediaInformationTarget::CRemConMediaInformationTarget(CRemConInterfaceSelector& aInterfaceSelector, |
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48 MRemConMediaInformationTargetObserver& aObserver) |
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49 : CRemConInterfaceBase(TUid::Uid(KRemConMediaInformationApiUid), |
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50 KMaxLengthMediaInformationMsg, |
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51 aInterfaceSelector, |
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52 ERemConClientTypeTarget), |
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53 iObserver(aObserver), |
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54 iAttributeIterator(iMediaAttributeIDs), |
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55 iMsgQueue(_FOFF(CRemConMediaInformationQueuedMessage, iLink)) |
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56 { |
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57 } |
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58 |
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59 void CRemConMediaInformationTarget::ConstructL() |
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60 { |
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61 iResponse = new(ELeave)RRemConGetElementAttributesResponse(); |
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62 TCallBack cb(&NextMessageCb, this); |
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63 iNextMessageCallBack = new (ELeave) CAsyncCallBack(cb, CActive::EPriorityStandard); |
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64 BaseConstructL(); |
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65 } |
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66 |
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67 |
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68 /** Destructor. |
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69 |
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70 @publishedAll |
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71 @released |
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72 */ |
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73 EXPORT_C CRemConMediaInformationTarget::~CRemConMediaInformationTarget() |
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74 { |
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75 iMediaAttributeIDs.Close(); |
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76 iResponse->Close(); |
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77 delete iResponse; |
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78 iNextMessageCallBack->Cancel(); |
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79 delete iNextMessageCallBack; |
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80 TSglQueIter<CRemConMediaInformationQueuedMessage> iter(iMsgQueue); |
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81 CRemConMediaInformationQueuedMessage* msg; |
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82 iter.SetToFirst(); |
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83 while ((msg = iter++) != NULL) |
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84 { |
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85 iMsgQueue.Remove(*msg); |
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86 delete msg; |
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87 } |
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88 } |
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89 |
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90 /** Gets a pointer to a specific interface version. |
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91 |
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92 @return A pointer to the interface, NULL if not supported. |
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93 @internalComponent |
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94 @released |
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95 */ |
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96 TAny* CRemConMediaInformationTarget::GetInterfaceIf(TUid aUid) |
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97 { |
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98 TAny* ret = NULL; |
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99 if ( aUid == TUid::Uid(KRemConInterfaceIf1) ) |
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100 { |
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101 ret = reinterpret_cast<TAny*>( |
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102 static_cast<MRemConInterfaceIf*>(this) |
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103 ); |
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104 } |
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105 |
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106 return ret; |
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107 } |
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108 |
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109 EXPORT_C TInt CRemConMediaInformationTarget::AttributeValue( TMediaAttributeId aAttributeId, TDesC8& aAttributeData ) |
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110 { |
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111 // check that the values supplied were requested |
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112 if ( KErrNotFound == iMediaAttributeIDs.Find( aAttributeId ) ) |
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113 { |
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114 return KErrNotFound; |
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115 } |
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116 |
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117 REAResponse resp; |
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118 resp.iAttributeId = aAttributeId; |
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119 resp.iCharset = KUtf8MibEnum; |
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120 resp.iStringLen = aAttributeData.Length(); |
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121 resp.iString = aAttributeData.Alloc(); |
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122 if (resp.iString == NULL) |
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123 { |
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124 return KErrNoMemory; |
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125 } |
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126 TInt status = iResponse->iAttributes.Append(resp); |
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127 if (status != KErrNone) |
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128 { |
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129 resp.Close(); // make sure heap string is de-allocated |
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130 } |
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131 return status; |
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132 } |
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133 |
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134 // from MRemConInterfaceIf |
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135 void CRemConMediaInformationTarget::SendError(TInt aError) |
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136 { |
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137 RBuf8 outBuf; |
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138 if (outBuf.Create(KAVCFrameMaxLength) != KErrNone) |
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139 { |
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140 // On OOM drop the message |
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141 return; |
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142 } |
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143 |
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144 TInt error = 0; |
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145 RAvrcpIPCError response; |
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146 response.iError = aError; |
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147 TRAP(error, response.WriteL(outBuf)); // Don't send error if OOM |
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148 if (error == KErrNone) |
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149 { |
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150 InterfaceSelector().SendUnreliable(TUid::Uid(KRemConMediaInformationApiUid), |
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151 EGetElementAttributes, ERemConResponse, outBuf); |
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152 } |
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153 outBuf.Close(); |
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154 } |
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155 |
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156 // from MRemConInterfaceIf |
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157 void CRemConMediaInformationTarget::MrcibNewMessage(TUint aOperationId, const TDesC8& aData ) |
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158 { |
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159 LOG1(_L("\taOperationId = 0x%02x"), aOperationId); |
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160 LOG1(_L("\taData.Length = %d"), aData.Length()); |
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161 |
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162 (void) aOperationId; // ignore warning about this variable being unused |
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163 |
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164 if (!iInProgress && iMsgQueue.IsEmpty()) |
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165 { |
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166 ProcessMessage(aData); |
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167 } |
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168 else |
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169 { |
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170 CRemConMediaInformationQueuedMessage* msg = NULL; |
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171 TRAPD(err, msg = CRemConMediaInformationQueuedMessage::NewL(aData)); |
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172 if (err == KErrNone) |
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173 { |
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174 iMsgQueue.AddLast(*msg); |
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175 } |
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176 } |
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177 } |
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178 |
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179 void CRemConMediaInformationTarget::ProcessMessage(const TDesC8& aData) |
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180 { |
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181 iInProgress = ETrue; |
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182 // Try to read the incoming request |
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183 TInt error = KErrNone; |
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184 RRemConGetElementAttributesRequest request; |
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185 TRAP(error, request.ReadL(aData)); |
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186 |
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187 // Couldn't parse the request; tell them it was invalid |
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188 if (error != KErrNone) |
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189 { |
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190 request.Close(); |
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191 return SendError(KErrAvrcpMetadataParameterNotFound); |
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192 } |
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193 |
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194 // Specification section 5.3.1 (page 49) says unique id |
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195 // must be 0x0. All other values are currently reserved |
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196 if (request.iElement != 0) |
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197 { |
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198 request.Close(); |
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199 return SendError(KErrAvrcpMetadataInvalidParameter); |
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200 } |
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201 |
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202 // this may have been used by a previous GetElementAttributes, so |
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203 iMediaAttributeIDs.Reset(); |
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204 |
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205 if (request.iNumberAttributes == 0) |
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206 { |
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207 // spec says this is a request for all attribs |
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208 // current spec has 7 specified (0x01 to 0x07) |
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209 for (TInt i = 1; i <= 7; i++) |
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210 { |
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211 if (iMediaAttributeIDs.Append((TMediaAttributeId)i) != KErrNone) |
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212 { |
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213 request.Close(); |
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214 return SendError(KErrAvrcpMetadataInternalError); |
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215 } |
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216 } |
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217 } |
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218 else |
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219 { |
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220 // No need to check request.iNumberAttributes == request.iAttributes.Count() |
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221 // as this must be correct or request.ReadL(aData) leaves |
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222 for (TInt i = 0; i < request.iNumberAttributes; i++) |
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223 { |
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224 TUint8 value = request.iAttributes[i]; |
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225 if (value > 0 && value <= KMaxMediaAttributeValue ) |
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226 { |
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227 if (iMediaAttributeIDs.Append((TMediaAttributeId)value) != KErrNone) |
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228 { |
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229 request.Close(); |
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230 return SendError(KErrAvrcpMetadataInternalError); |
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231 } |
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232 } |
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233 } |
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234 } |
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235 request.Close(); |
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236 |
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237 // check that some valid attribute ids have been found |
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238 if (iMediaAttributeIDs.Count()) |
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239 { |
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240 // if the client has not yet called Completed() on the last request |
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241 // clear the the attributes from the previous response |
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242 iResponse->Close(); |
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243 |
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244 // reset the interator to the start, as it may have been used before |
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245 iAttributeIterator.Start(); |
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246 |
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247 // call the client API to get the client value. |
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248 iObserver.MrcmitoGetCurrentlyPlayingMetadata(iAttributeIterator); |
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249 } |
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250 else |
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251 { |
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252 // no valid attribute ids found so return an error to bearer |
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253 SendError(KErrAvrcpMetadataParameterNotFound); |
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254 } |
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255 } |
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256 |
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257 // The client application has signaled that all attributes have been returned so |
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258 // response can now be sent |
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259 EXPORT_C void CRemConMediaInformationTarget::Completed() |
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260 { |
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261 if (!iInProgress) |
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262 { |
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263 return; |
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264 } |
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265 // Finalise response; update number of attributes returned |
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266 iResponse->iNumberAttributes = iResponse->iAttributes.Count(); |
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267 |
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268 //Check the bound of the number of attributes, zero is not permitted |
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269 if (iResponse->iNumberAttributes == 0) |
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270 { |
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271 return SendError(KErrAvrcpMetadataInternalError); |
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272 } |
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273 |
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274 // Allocate a buffer for the formatted message |
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275 RBuf8 messageBuffer; |
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276 if ( messageBuffer.Create(iResponse->Size()) != KErrNone ) |
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277 { |
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278 // On OOM drop the message |
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279 iResponse->Close(); |
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280 return; |
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281 } |
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282 |
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283 // send the result back to the CT |
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284 TInt error = KErrNone; |
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285 TRAP(error, iResponse->WriteL(messageBuffer)); |
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286 if (error == KErrNone) |
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287 { |
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288 InterfaceSelector().SendUnreliable(TUid::Uid(KRemConMediaInformationApiUid), |
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289 EGetElementAttributes, ERemConResponse, messageBuffer); |
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290 } |
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291 |
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292 // Make sure attribute list is reset for next time |
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293 iResponse->Close(); |
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294 messageBuffer.Close(); |
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295 |
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296 iInProgress = EFalse; |
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297 if (!iMsgQueue.IsEmpty()) |
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298 { |
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299 iNextMessageCallBack->CallBack(); |
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300 } |
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301 |
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302 } |
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303 |
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304 int CRemConMediaInformationTarget::NextMessageCb(TAny* aThis) |
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305 { |
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306 static_cast<CRemConMediaInformationTarget*>(aThis)->DoNextMessage(); |
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307 return KErrNone; |
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308 } |
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309 |
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310 void CRemConMediaInformationTarget::DoNextMessage() |
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311 { |
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312 CRemConMediaInformationQueuedMessage* msg = iMsgQueue.First(); |
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313 iMsgQueue.Remove(*msg); |
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314 ProcessMessage(msg->Data()); |
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315 delete msg; |
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316 } |
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317 |
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318 EXPORT_C TMediaAttributeIter::TMediaAttributeIter(RArray<TMediaAttributeId>& aMediaAttributeIDs) : |
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319 iMediaAttributeIDs(aMediaAttributeIDs), |
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320 iterator(0) |
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321 { |
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322 } |
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323 |
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324 EXPORT_C void TMediaAttributeIter::Start() |
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325 { |
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326 iterator = 0; |
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327 } |
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328 |
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329 EXPORT_C TBool TMediaAttributeIter::Next(TMediaAttributeId& aId) |
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330 { |
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331 TInt count = iMediaAttributeIDs.Count(); |
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332 if (iterator > count - 1) |
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333 { |
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334 return EFalse; |
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335 } |
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336 aId = iMediaAttributeIDs[iterator]; |
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337 iterator++; |
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338 return ETrue; |
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339 } |
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340 |
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341 CRemConMediaInformationQueuedMessage* CRemConMediaInformationQueuedMessage::NewL(const TDesC8& aData) |
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342 { |
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343 CRemConMediaInformationQueuedMessage* self = new (ELeave) CRemConMediaInformationQueuedMessage(); |
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344 CleanupStack::PushL(self); |
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345 self->ConstructL(aData); |
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346 CleanupStack::Pop(self); |
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347 return self; |
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348 } |
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349 |
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350 CRemConMediaInformationQueuedMessage::CRemConMediaInformationQueuedMessage() |
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351 { |
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352 |
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353 } |
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354 |
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355 void CRemConMediaInformationQueuedMessage::ConstructL(const TDesC8& aData) |
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356 { |
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357 iData.CreateL(aData); |
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358 } |
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359 |
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360 CRemConMediaInformationQueuedMessage::~CRemConMediaInformationQueuedMessage() |
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361 { |
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362 iData.Close(); |
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363 } |
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364 |
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365 const TDesC8& CRemConMediaInformationQueuedMessage::Data() |
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366 { |
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367 return iData; |
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368 } |
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369 |
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370 |
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371 |
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