--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/bluetooth/btstack/avdtp/avdtpMediaSession.cpp	Fri Jan 15 08:13:17 2010 +0200
@@ -0,0 +1,264 @@
+// Copyright (c) 2003-2009 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:
+// Implements the avdtp media transport session
+// 
+//
+
+/**
+ @file
+ @internalComponent
+*/
+
+#include <bluetooth/logger.h>
+#include "avdtpMediaSession.h"
+#include "avdtp.h"
+#include "avdtpsap.h"
+#include "avdtpStream.h"
+#include "avdtputil.h"
+#include "gavdpinterface.h"
+
+//#include <es_mbman.h> // for MBUF logging
+
+#ifdef __FLOG_ACTIVE
+_LIT8(KLogComponent, LOG_COMPONENT_AVDTP);
+#endif
+
+CMediaSession* CMediaSession::NewLC(CAvdtpProtocol& aProtocol, CAvdtpSAP& aSAP, CAVStream& aStream)
+	{
+	LOG_STATIC_FUNC
+	CMediaSession* s = new (ELeave) CMediaSession(aProtocol, aSAP, aStream);
+	CleanupStack::PushL(s);
+	s->ConstructL();
+	return s;
+	}
+	
+CMediaSession* CMediaSession::NewL(CAvdtpProtocol& aProtocol, CAvdtpSAP& aSAP, CAVStream& aStream)
+	{
+	LOG_STATIC_FUNC
+	CMediaSession* s = CMediaSession::NewLC(aProtocol, aSAP, aStream);
+	CleanupStack::Pop();
+	return s;		
+	}
+	
+CMediaSession::CMediaSession(CAvdtpProtocol& aProtocol, CAvdtpSAP& aSAP, CAVStream& aStream)
+: CUserPlaneTransportSession(aProtocol, aSAP, EMedia, aStream)
+	{
+	LOG_FUNC
+	iNotifyMediaPacketDroppedFlag = EFalse;
+	iPacketsLost = 0;
+	}
+	
+void CMediaSession::ConstructL()
+	{
+	LOG_FUNC
+	CUserPlaneTransportSession::ConstructL();
+	
+	// Balking is set to true.  This allows the circular buffer to wrap
+	// and overwrite the oldest data.
+	User::LeaveIfError(iSendPool.Create(4, ETrue));
+	User::LeaveIfError(iReceivePool.Create(16, ETrue));
+	}
+
+TInt CMediaSession::DoActiveOpen()
+	{
+	LOG_FUNC
+	__ASSERT_DEBUG(iStream, Panic(EAvdtpTransportSessionBaseNotCheckStream));
+	TInt ret = KErrGeneral; // may be OOM or notfound
+
+	ret = iStream->AddSession(EMedia,*this,iTransportChannel);
+	if (ret!=KErrNone)
+		{
+		// not erroring the stream, as it's not it's fault
+		// and it may not exist anyway!
+		iStream = NULL;
+		iSAP.Error(ret);
+		}
+	return ret;	
+	}
+
+TInt CMediaSession::Send(RMBufChain& aData, TUint /*aOptions*/, TSockAddr* /*aAddr*/)
+	{
+	LOG_FUNC
+	// if we get flow controlled should we *could* indicate to reporting session which could complete
+	// an ioctl (for rtcp use)
+//	if (iStream && iStream->CanSend(EMedia))
+	TInt requestedToSend = aData.Length();
+	TInt packetsLostThisSend = 0; // Packets lost during this send (if any)
+
+	if (!iTransportChannelBlocked)
+		{
+		RMBufChain toSend;
+		iSendPool.Remove(toSend);
+		
+		if (toSend.IsEmpty())
+			{
+			toSend.Assign(aData);
+			}
+		else
+			{
+			iSendPool.Add(aData, packetsLostThisSend);
+			iPacketsLost += packetsLostThisSend;
+			}
+			
+		DoSend(toSend);
+		}
+	else
+		{
+		iSendPool.Add(aData, packetsLostThisSend);
+		iPacketsLost += packetsLostThisSend;
+		}
+	
+	// If client app has previous sent pack drop IOCTL it needs to be notified
+	if (iNotifyMediaPacketDroppedFlag && iPacketsLost)
+		{
+		TPckgBuf<TInt> buf(iPacketsLost);
+		iSAP.ServiceComplete(&buf);
+		iNotifyMediaPacketDroppedFlag = EFalse;
+		iPacketsLost = 0;
+		}
+		
+	return requestedToSend;
+	}
+
+// if pools become nicely generic then we could move this sending stuff to base class
+// and have sessions just configure the Tx, Rx pools
+void CMediaSession::DoSend(RMBufChain& aData)
+	{
+	LOG_FUNC
+	if (iTransportChannel->SendPacket(EMedia, aData)==0)
+		{
+		// as media session, just free stale AV data (gets tricky putting stuff back on pool, and not really needed)
+		// but mark TC as blokced so we can begin buffering in future
+		aData.Free();
+		iTransportChannelBlocked = ETrue;
+		}
+	}
+	
+
+void CMediaSession::CanSend()
+	{
+	LOG_FUNC
+	// pluck off pool
+	iTransportChannelBlocked = EFalse;
+	//RDebug::Print(_L("MBuf free %d"), CMBufManager::Context()->__DbgGetBufSpace());
+	// something was placed on the send pool - remove it and send
+	RMBufChain chain;
+
+	do
+		{
+		iSendPool.Remove(chain);
+		if (!chain.IsEmpty())
+			{
+			DoSend(chain);
+			}
+		}
+	while (!chain.IsEmpty());
+	}
+
+void CMediaSession::ReceivePacketLost()
+	{
+	// Increment the packet lost count.
+	iPacketsLost++;
+	
+	// If client app has previous sent pack drop IOCTL it needs to be notified
+	if (iNotifyMediaPacketDroppedFlag)
+		{
+		TPckgBuf<TInt> buf(iPacketsLost);
+		iSAP.ServiceComplete(&buf);
+		iNotifyMediaPacketDroppedFlag = EFalse;
+		iPacketsLost = 0;
+		}
+	}
+
+TInt CMediaSession::GetOption(TUint aLevel, TUint aName, TDes8& aOption) const
+	{
+	LOG_FUNC
+	TInt ret = KErrArgument;
+	if (aLevel == KSolBtAVDTPMedia)
+		{
+		switch (aName)
+			{
+			case EAvdtpMediaGetMaximumPacketSize:
+				{
+				if (iTransportChannel)
+					{
+					TInt mtu;
+					ret = iTransportChannel->MaxPacketSize(mtu);
+					if (ret==KErrNone)
+						{
+						LOG1(_L("Media session transport channel MTU = %d"), mtu);
+						TPckg<TInt> mtuBuf(mtu);
+						aOption = mtuBuf;
+						}
+					}
+				else
+					{
+					ret = KErrNotReady;
+					}
+				}
+			break;
+			case EAvdtpMediaGetMaximumReceivePacketSize:
+				{
+				if (iTransportChannel)
+					{
+					TInt mru;
+					ret = iTransportChannel->MaxReceivePacketSize(mru);
+					if (ret==KErrNone)
+						{
+						LOG1(_L("Media session transport channel MRU = %d"), mru);
+						TPckg<TInt> mruBuf(mru);
+						aOption = mruBuf;
+						}
+					}
+				else
+					{
+					ret = KErrNotReady;
+					}
+				}
+			break;
+			default:
+				ret = KErrNotSupported;
+			}
+		}
+			
+	return ret;
+	}
+
+void CMediaSession::Ioctl(TUint aLevel, TUint aName, const TDesC8* /* aOption */)
+	{
+	LOG_FUNC
+	TInt res;
+	
+	if (aLevel == KSolBtAVDTPMedia)	
+		{
+		switch (aName)
+			{
+			case ENotifyAvdtpMediaPacketDropped:
+				{
+				iNotifyMediaPacketDroppedFlag= ETrue;
+				res = KErrNone;
+				break;
+				}
+			default:
+				{
+				res = KErrNotSupported;
+				break;
+				}
+			}
+		if (res!=KErrNone)
+			{
+			iSAP.Error(res);
+			}
+		}
+	}