--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/realtimenetprots/sipfw/ClientResolver/Resolver/src/CSdpRtpmapStrategy.cpp	Tue Feb 02 01:03:15 2010 +0200
@@ -0,0 +1,240 @@
+// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "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:
+// Name          : CSdpRtpmapStrategy.cpp
+// Part of       : SIP Client Resolver
+// Version       : 1.0
+//
+
+
+
+#include "CSdpRtpmapStrategy.h"
+#include "sdpdocument.h"
+#include "sdpmediafield.h"
+#include "sdpcodecstringconstants.h"
+#include "sdpcodecstringpool.h"
+
+const TUint KMinDynPayloadType = 96;
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::NewLC
+// ----------------------------------------------------------------------------
+//
+CSdpRtpmapStrategy* CSdpRtpmapStrategy::NewLC(
+    const MSipClients& aSipClients)
+	{
+	CSdpRtpmapStrategy* self = 
+		new(ELeave)CSdpRtpmapStrategy(aSipClients);
+	CleanupStack::PushL(self);
+	self->ConstructL();
+	return self;
+	}
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::CSdpRtpmapStrategy
+// ----------------------------------------------------------------------------
+//
+CSdpRtpmapStrategy::CSdpRtpmapStrategy(const MSipClients& aSipClients) 
+ : CSdpMLineStrategyBase(aSipClients)
+	{
+	}
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::ConstructL
+// ----------------------------------------------------------------------------
+//
+void CSdpRtpmapStrategy::ConstructL()
+	{
+	iApplicationStringF = 
+	    SdpCodecStringPool::StringPoolL().StringF(
+	        SdpCodecStringConstants::EMediaApplication,
+	        SdpCodecStringPool::StringTableL());	
+	
+	iRtpAvpStringF = 
+	    SdpCodecStringPool::StringPoolL().StringF(
+	        SdpCodecStringConstants::EProtocolRtpAvp,
+	        SdpCodecStringPool::StringTableL());
+	        
+	iRtpmapStringF = 
+	    SdpCodecStringPool::StringPoolL().StringF(
+	        SdpCodecStringConstants::EAttributeRtpmap,
+	        SdpCodecStringPool::StringTableL());
+	}
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::~CSdpRtpmapStrategy
+// ----------------------------------------------------------------------------
+//
+CSdpRtpmapStrategy::~CSdpRtpmapStrategy ()
+	{
+	iRtpmapStringF.Close();
+	iRtpAvpStringF.Close();
+	iApplicationStringF.Close();
+	}
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::IsApplicable
+// ----------------------------------------------------------------------------
+//	
+TBool CSdpRtpmapStrategy::IsApplicable(CSdpMediaField& aMediaField)
+    {
+	if (aMediaField.Media() != iApplicationStringF &&
+	    aMediaField.Protocol() == iRtpAvpStringF &&
+	    aMediaField.FormatAttributeFields().Count() > 0)
+	    {
+	    return ETrue;
+	    }
+    return EFalse;
+    }
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::FieldsMatchL
+// ----------------------------------------------------------------------------
+//
+TBool CSdpRtpmapStrategy::FieldsMatchL(
+    const CSdpMediaField& aReceivedMedia,
+    const CSdpMediaField& aClientMedia)
+    {
+	if (aReceivedMedia.Media() == aClientMedia.Media() &&
+	    aReceivedMedia.Protocol() == iRtpAvpStringF &&
+	    aClientMedia.Protocol() == iRtpAvpStringF)
+	    {
+        const RPointerArray<CSdpFmtAttributeField>& clientAttributes = 
+            const_cast<CSdpMediaField&>(aClientMedia).FormatAttributeFields();
+	    if (clientAttributes.Count() == 0)
+	        {
+	        // A client that does not announce any RTPMAPs 
+	        // is assumed to accept all possible mappings.
+	        return ETrue;
+	        }
+	        
+	    if (HasMatchingFormatsL(aReceivedMedia,aClientMedia))
+	        {
+	        return ETrue;
+	        }
+	        
+        const RPointerArray<CSdpFmtAttributeField>& attributes = 
+            const_cast<CSdpMediaField&>(aReceivedMedia).FormatAttributeFields();
+	    for (TInt i=0; i < attributes.Count(); i++)
+	        {
+	        if (HasMatchingRtpmapAttritbute(aClientMedia,*attributes[i]))
+	            {
+	            return ETrue;
+	            }
+	        }
+	    }
+	return EFalse;
+	}
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::HasMatchingRtpmapAttritbute
+// ----------------------------------------------------------------------------
+//	
+TBool CSdpRtpmapStrategy::HasMatchingRtpmapAttritbute(
+    const CSdpMediaField& aMediaField,
+    const CSdpFmtAttributeField& aAttribute)
+    {
+    if (aAttribute.Attribute() != iRtpmapStringF)
+        {
+        return EFalse;
+        }
+        
+    const RPointerArray<CSdpFmtAttributeField>& attributes = 
+        const_cast<CSdpMediaField&>(aMediaField).FormatAttributeFields();
+        
+    for (TInt i=0; i < attributes.Count(); i++)
+        {
+        CSdpFmtAttributeField& attribute = *attributes[i];
+        if (attribute.Attribute() == iRtpmapStringF &&
+            aAttribute.Value().CompareF(attribute.Value()) == 0)
+            {
+            return ETrue;
+            }
+        }
+    
+    return EFalse;
+    }
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::HasMatchingFormatsL
+// ----------------------------------------------------------------------------
+//
+TBool CSdpRtpmapStrategy::HasMatchingFormatsL(
+    const CSdpMediaField& aReceivedMedia,
+    const CSdpMediaField& aClientMedia) const
+    {
+    if (aReceivedMedia.Protocol() != iRtpAvpStringF ||
+	    aClientMedia.Protocol() != iRtpAvpStringF)
+	    {
+	    return EFalse;
+	    }
+    
+    RArray<TUint> formats(ExtractFormatsL(aReceivedMedia.FormatList()));
+    CleanupClosePushL(formats);
+    
+    const RPointerArray<CSdpFmtAttributeField>& clientAttributes = 
+        const_cast<CSdpMediaField&>(aClientMedia).FormatAttributeFields();
+    
+    for (TInt i=0; i < clientAttributes.Count(); i++)
+        {
+        const CSdpFmtAttributeField& clientAttribute = *clientAttributes[i];
+        if (clientAttribute.Attribute() == iRtpmapStringF)
+            {
+            TLex8 formatLex(clientAttribute.Format());
+            TUint value = 0;
+            if (formatLex.Val(value) == KErrNone && 
+                value < KMinDynPayloadType)
+                {
+                TInt index = 0;
+                TInt err = formats.FindInOrder(value,index);
+                if (err == KErrNone && index >= 0)
+                    {
+                    CleanupStack::PopAndDestroy(1); // formats 
+                    return ETrue;
+                    }
+                }
+            }
+        }
+
+    CleanupStack::PopAndDestroy(1); // formats      
+    return EFalse;
+    }
+
+// ----------------------------------------------------------------------------
+// CSdpRtpmapStrategy::ExtractFormatsL
+// ----------------------------------------------------------------------------
+//
+RArray<TUint> CSdpRtpmapStrategy::ExtractFormatsL(
+    const TDesC8& aFormats) const
+    {
+    RArray<TUint> formats;
+    CleanupClosePushL(formats);
+    TLex8 formatLex(aFormats);
+    formatLex.SkipSpace();
+    TUint value = 0;
+    while (!formatLex.Eos())
+        {
+        if (formatLex.Val(value) == KErrNone)
+            {
+            formats.InsertInOrderAllowRepeatsL(value);
+            }
+        else
+            {
+            // Skip the invalid token
+            formatLex.NextToken();
+            }
+        formatLex.SkipSpace();
+        }
+    CleanupStack::Pop(&formats);
+    return formats;
+    }