--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/contentmgmt/cafstreamingsupport/inc/streamagentresolver.h Fri Apr 16 16:52:34 2010 +0300
@@ -0,0 +1,103 @@
+// 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:
+//
+
+/**
+ @file
+ @internalComponent
+ @released
+*/
+
+#ifndef STREAMAGENTRESOLVER_H
+#define STREAMAGENTRESOLVER_H
+
+#include <e32base.h>
+#include <ecom/ecom.h>
+#include "streamagentinfo.h"
+
+namespace StreamAccess
+ {
+
+ class CStreamAgentInfo;
+
+ /**
+ * Responsible for the identification of stream agent ECOM plug-in implementations and
+ * the selection of the most appropriate agent based on the key stream session description
+ * metadata and plug-in resource file information.
+ */
+ class CStreamAgentResolver : public CBase
+ {
+ public:
+
+ /* Constructs a new instance of CStreamAgentResolver and pushs it onto the cleanup stack
+ * @return Pointer to the new CStreamAgentResolver object
+ */
+ static CStreamAgentResolver* NewLC();
+
+ /* Destructor
+ */
+ ~CStreamAgentResolver();
+
+ /* Resolves a stream agent by the SDP (Session Description Protocol) media description
+ * of the key stream.
+ * @param aSdpKeyStream SDP media description of the key stream
+ * @return Reference to the CStreamAgentInfo instance for the chosen Stream Agent, capable
+ * of decoding the key stream.
+ * NOTE: The lifetime of the returned reference is limited by the lifetime of the resolver.
+ * The CStreamAgentInfo reference cannot be used after the CStreamAgentResolver object is
+ * destroyed.
+ * @leave KErrCANoAgent No stream agent can be found that supports the given SDP key management
+ * description
+ * @leave One of the system-wide error codes
+ */
+ CStreamAgentInfo& ResolveSdpKeyStreamL(const CSdpMediaField& aSdpKeyStream) const;
+
+ protected:
+
+ /* Constructor
+ */
+ CStreamAgentResolver();
+
+ /* Second phase of construction for CStreamAgentResolver
+ */
+ void ConstructL();
+
+ private:
+
+ /* Constructs a list of information about plug-in implementations located
+ * by the ECOM framework that satisfy the stream agent interface.
+ */
+ void BuildStreamAgentListL();
+
+ /* Adds a new instance of a stream agent to the CStreamAgentInfo array
+ * @param aAgentInfo Registration data regarding the stream agent interface implementation,
+ * retrieved from the associated resource file
+ */
+ void AddStreamAgentL(const CImplementationInformation& aAgentInfo);
+
+ /* Cleanup Item Operation used when constructing the stream agent list via ECOM
+ * @param aArray Pointer to an RImplInfoPtrArray array which is used by ECOM to store
+ * information about located stream agents implementations
+ */
+ static void CleanAgentImplArray(TAny* aArray);
+
+ private:
+
+ /* Array of information regarding stream agent interface implementations located by ECOM
+ */
+ RPointerArray<CStreamAgentInfo> iStreamAgentInfoArray;
+
+ };
+ } // namespace StreamAccess
+#endif /*STREAMAGENTRESOLVER_H*/