|
1 // Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of the License "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // |
|
15 |
|
16 #include "streamagentresolver.h" |
|
17 #include "streamagentinfo.h" |
|
18 #include <caf/streaming/streamagentfactory.h> |
|
19 #include <caf/patchdata.h> |
|
20 #include "scaflog.h" |
|
21 |
|
22 #include <caf/caferr.h> |
|
23 |
|
24 using namespace StreamAccess; |
|
25 |
|
26 CStreamAgentResolver* CStreamAgentResolver::NewLC() |
|
27 { |
|
28 CStreamAgentResolver* self = new(ELeave) CStreamAgentResolver(); |
|
29 CleanupStack::PushL(self); |
|
30 self->ConstructL(); |
|
31 return self; |
|
32 } |
|
33 |
|
34 CStreamAgentResolver::CStreamAgentResolver() |
|
35 { |
|
36 } |
|
37 |
|
38 CStreamAgentResolver::~CStreamAgentResolver() |
|
39 { |
|
40 // Reset and Destroy the stream agent information array |
|
41 iStreamAgentInfoArray.ResetAndDestroy(); |
|
42 } |
|
43 |
|
44 void CStreamAgentResolver::ConstructL() |
|
45 { |
|
46 // Construct a list of the available stream agent interface implementations |
|
47 BuildStreamAgentListL(); |
|
48 } |
|
49 |
|
50 void CStreamAgentResolver::BuildStreamAgentListL() |
|
51 { |
|
52 /* Construct a new implementation information array that is used in conjunction with the ECOM |
|
53 * framework in order to retrieve resource data about the available stream agent plug-ins |
|
54 */ |
|
55 RImplInfoPtrArray agentImplArray; |
|
56 CleanupStack::PushL(TCleanupItem(CleanAgentImplArray, &agentImplArray)); |
|
57 REComSession::ListImplementationsL(KUidStreamAgentFactoryInterface, agentImplArray); |
|
58 |
|
59 TInt streamAgentCount = agentImplArray.Count(); |
|
60 |
|
61 DEBUG_PRINTF2(_L("Number of streaming agents found on the device: %d"),streamAgentCount); |
|
62 |
|
63 for (TInt i = 0; i < streamAgentCount; ++i) |
|
64 { |
|
65 /* In order to load stream agents from sources other than ROM, the patch |
|
66 * data KCafLoadPostProductionAgents must be set to True (non-zero). |
|
67 * Default SymbianOS behavior is to only load file and streaming agents from ROM |
|
68 */ |
|
69 if ((KCafLoadPostProductionAgents == 0) && |
|
70 !agentImplArray[i]->RomBased()) |
|
71 { |
|
72 /* If the stream agent is not in ROM, don't load it because it might |
|
73 * be a security risk. |
|
74 */ |
|
75 continue; |
|
76 } |
|
77 |
|
78 /* Construct a seperate element in the CStreamAgentInfo array for each of the |
|
79 * identified stream agent implementations |
|
80 */ |
|
81 AddStreamAgentL(*agentImplArray[i]); |
|
82 } |
|
83 |
|
84 CleanupStack::PopAndDestroy(&agentImplArray); |
|
85 } |
|
86 |
|
87 void CStreamAgentResolver::CleanAgentImplArray(TAny* aArray) |
|
88 { |
|
89 // Performs the cleanup on the implementation information array |
|
90 static_cast<RImplInfoPtrArray*>(aArray)->ResetAndDestroy(); |
|
91 } |
|
92 |
|
93 void CStreamAgentResolver::AddStreamAgentL(const CImplementationInformation& aAgentInfo) |
|
94 { |
|
95 // Create a new CStreamAgentInfo instance to add to the stream agent list |
|
96 CStreamAgentInfo* agentInformation = CStreamAgentInfo::NewLC(aAgentInfo); |
|
97 |
|
98 TUid agentUid(agentInformation->ImplementationUid()); |
|
99 TPtrC agentName(agentInformation->Name()); |
|
100 |
|
101 DEBUG_PRINTF3(_L("Stream Agent Identified: 0x%08x (%S)"),agentUid,&agentName); |
|
102 |
|
103 // Append the CStreamAgentInfo object to the stream agent information array |
|
104 User::LeaveIfError(iStreamAgentInfoArray.Append(agentInformation)); |
|
105 CleanupStack::Pop(agentInformation); |
|
106 } |
|
107 |
|
108 CStreamAgentInfo& CStreamAgentResolver::ResolveSdpKeyStreamL(const CSdpMediaField& aSdpKeyStream) const |
|
109 { |
|
110 TInt streamAgentInfoCount = iStreamAgentInfoArray.Count(); |
|
111 |
|
112 /* Loop through each of the identified stream agents to determine which (if any) supports |
|
113 * the SDP key management description |
|
114 */ |
|
115 for(TInt i=0; i < streamAgentInfoCount; ++i) |
|
116 { |
|
117 if(iStreamAgentInfoArray[i]->IsKeyStreamSupportedL(aSdpKeyStream)) |
|
118 { |
|
119 TUid agentUid(iStreamAgentInfoArray[i]->ImplementationUid()); |
|
120 TPtrC agentName (iStreamAgentInfoArray[i]->Name()); |
|
121 DEBUG_PRINTF3(_L("Key stream is supported by the agent: 0x%08x (%S)"),agentUid,&agentName); |
|
122 return *iStreamAgentInfoArray[i]; |
|
123 } |
|
124 } |
|
125 |
|
126 // If a stream agent capable of decoding the key stream can not be found, leave with KErrCANoAgent |
|
127 DEBUG_PRINTF(_L("A stream agent capable of decoding the key stream can not be found!")); |
|
128 User::Leave(KErrCANoAgent); |
|
129 |
|
130 // Return NULL reference to avoid warnings (should never get here) |
|
131 CStreamAgentInfo* retVal=NULL; |
|
132 return *retVal; |
|
133 } |