--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/contentmgmt/cafstreamingsupport/source/streamagentresolver.cpp	Mon Mar 15 12:46:43 2010 +0200
@@ -0,0 +1,133 @@
+// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+//
+
+#include "streamagentresolver.h"
+#include "streamagentinfo.h"
+#include <caf/streaming/streamagentfactory.h>
+#include <caf/patchdata.h>
+#include "scaflog.h"
+
+#include <caf/caferr.h>
+
+using namespace StreamAccess;
+
+CStreamAgentResolver* CStreamAgentResolver::NewLC()
+	{
+	CStreamAgentResolver* self = new(ELeave) CStreamAgentResolver();
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	return self;
+	}
+
+CStreamAgentResolver::CStreamAgentResolver()
+	{
+	}
+
+CStreamAgentResolver::~CStreamAgentResolver()
+	{
+	// Reset and Destroy the stream agent information array 
+	iStreamAgentInfoArray.ResetAndDestroy();
+	}
+
+void CStreamAgentResolver::ConstructL()
+	{
+	// Construct a list of the available stream agent interface implementations
+	BuildStreamAgentListL();
+	}
+
+void CStreamAgentResolver::BuildStreamAgentListL()
+	{
+	/* Construct a new implementation information array that is used in conjunction with the ECOM
+	 * framework in order to retrieve resource data about the available stream agent plug-ins
+	 */
+	RImplInfoPtrArray agentImplArray;
+	CleanupStack::PushL(TCleanupItem(CleanAgentImplArray, &agentImplArray));
+	REComSession::ListImplementationsL(KUidStreamAgentFactoryInterface, agentImplArray);
+	
+	TInt streamAgentCount = agentImplArray.Count();
+	
+	DEBUG_PRINTF2(_L("Number of streaming agents found on the device: %d"),streamAgentCount);
+	
+	for (TInt i = 0; i < streamAgentCount; ++i)
+		{
+		/* In order to load stream agents from sources other than ROM, the patch 
+		 * data KCafLoadPostProductionAgents must be set to True (non-zero).
+		 * Default SymbianOS behavior is to only load file and streaming agents from ROM
+		 */
+		if ((KCafLoadPostProductionAgents == 0) &&
+            !agentImplArray[i]->RomBased())
+			{
+			/* If the stream agent is not in ROM, don't load it because it might
+			 * be a security risk.
+			 */
+			continue;
+			}
+		
+		/* Construct a seperate element in the CStreamAgentInfo array for each of the 
+		 * identified stream agent implementations 
+		 */
+		AddStreamAgentL(*agentImplArray[i]);
+		}
+	
+	CleanupStack::PopAndDestroy(&agentImplArray);
+	}
+
+void CStreamAgentResolver::CleanAgentImplArray(TAny* aArray)
+	{
+	// Performs the cleanup on the implementation information array
+	static_cast<RImplInfoPtrArray*>(aArray)->ResetAndDestroy();
+	}
+
+void CStreamAgentResolver::AddStreamAgentL(const CImplementationInformation& aAgentInfo)
+	{
+	// Create a new CStreamAgentInfo instance to add to the stream agent list
+	CStreamAgentInfo* agentInformation = CStreamAgentInfo::NewLC(aAgentInfo);
+	
+	TUid agentUid(agentInformation->ImplementationUid());
+	TPtrC agentName(agentInformation->Name());
+	
+	DEBUG_PRINTF3(_L("Stream Agent Identified: 0x%08x (%S)"),agentUid,&agentName);
+	
+	// Append the CStreamAgentInfo object to the stream agent information array
+	User::LeaveIfError(iStreamAgentInfoArray.Append(agentInformation));
+	CleanupStack::Pop(agentInformation);
+	}
+
+CStreamAgentInfo& CStreamAgentResolver::ResolveSdpKeyStreamL(const CSdpMediaField& aSdpKeyStream) const
+	{
+	TInt streamAgentInfoCount = iStreamAgentInfoArray.Count();
+	
+	/* Loop through each of the identified stream agents to determine which (if any) supports 
+	 * the SDP key management description
+	 */
+	for(TInt i=0; i < streamAgentInfoCount; ++i)
+		{
+		if(iStreamAgentInfoArray[i]->IsKeyStreamSupportedL(aSdpKeyStream))
+			{
+			TUid agentUid(iStreamAgentInfoArray[i]->ImplementationUid());
+			TPtrC agentName (iStreamAgentInfoArray[i]->Name());
+			DEBUG_PRINTF3(_L("Key stream is supported by the agent: 0x%08x (%S)"),agentUid,&agentName);
+			return *iStreamAgentInfoArray[i];
+			}
+		}
+	
+	// If a stream agent capable of decoding the key stream can not be found, leave with KErrCANoAgent
+	DEBUG_PRINTF(_L("A stream agent capable of decoding the key stream can not be found!"));
+	User::Leave(KErrCANoAgent);
+	
+	// Return NULL reference to avoid warnings (should never get here)
+	CStreamAgentInfo* retVal=NULL;
+	return *retVal;
+	}