bluetooth/btstack/avdtp/avdtpMediaSession.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 15 Jan 2010 08:13:17 +0200
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// Copyright (c) 2003-2009 Nokia Corporation and/or its subsidiary(-ies).
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// All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of "Eclipse Public License v1.0"
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// which accompanies this distribution, and is available
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// at the URL "http://www.eclipse.org/legal/epl-v10.html".
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//
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// Initial Contributors:
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// Nokia Corporation - initial contribution.
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//
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// Contributors:
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//
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// Description:
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// Implements the avdtp media transport session
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// 
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//
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/**
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 @file
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 @internalComponent
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*/
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#include <bluetooth/logger.h>
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#include "avdtpMediaSession.h"
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#include "avdtp.h"
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#include "avdtpsap.h"
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#include "avdtpStream.h"
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#include "avdtputil.h"
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#include "gavdpinterface.h"
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//#include <es_mbman.h> // for MBUF logging
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#ifdef __FLOG_ACTIVE
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_LIT8(KLogComponent, LOG_COMPONENT_AVDTP);
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#endif
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CMediaSession* CMediaSession::NewLC(CAvdtpProtocol& aProtocol, CAvdtpSAP& aSAP, CAVStream& aStream)
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	{
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	LOG_STATIC_FUNC
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	CMediaSession* s = new (ELeave) CMediaSession(aProtocol, aSAP, aStream);
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	CleanupStack::PushL(s);
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	s->ConstructL();
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	return s;
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	}
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CMediaSession* CMediaSession::NewL(CAvdtpProtocol& aProtocol, CAvdtpSAP& aSAP, CAVStream& aStream)
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	{
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	LOG_STATIC_FUNC
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	CMediaSession* s = CMediaSession::NewLC(aProtocol, aSAP, aStream);
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	CleanupStack::Pop();
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	return s;		
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	}
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CMediaSession::CMediaSession(CAvdtpProtocol& aProtocol, CAvdtpSAP& aSAP, CAVStream& aStream)
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: CUserPlaneTransportSession(aProtocol, aSAP, EMedia, aStream)
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	{
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	LOG_FUNC
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	iNotifyMediaPacketDroppedFlag = EFalse;
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	iPacketsLost = 0;
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	}
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void CMediaSession::ConstructL()
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	{
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	LOG_FUNC
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	CUserPlaneTransportSession::ConstructL();
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	// Balking is set to true.  This allows the circular buffer to wrap
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	// and overwrite the oldest data.
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	User::LeaveIfError(iSendPool.Create(4, ETrue));
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	User::LeaveIfError(iReceivePool.Create(16, ETrue));
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	}
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TInt CMediaSession::DoActiveOpen()
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	{
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	LOG_FUNC
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	__ASSERT_DEBUG(iStream, Panic(EAvdtpTransportSessionBaseNotCheckStream));
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	TInt ret = KErrGeneral; // may be OOM or notfound
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	ret = iStream->AddSession(EMedia,*this,iTransportChannel);
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	if (ret!=KErrNone)
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		{
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		// not erroring the stream, as it's not it's fault
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		// and it may not exist anyway!
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		iStream = NULL;
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		iSAP.Error(ret);
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		}
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	return ret;	
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	}
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TInt CMediaSession::Send(RMBufChain& aData, TUint /*aOptions*/, TSockAddr* /*aAddr*/)
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	{
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	LOG_FUNC
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	// if we get flow controlled should we *could* indicate to reporting session which could complete
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	// an ioctl (for rtcp use)
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//	if (iStream && iStream->CanSend(EMedia))
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	TInt requestedToSend = aData.Length();
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	TInt packetsLostThisSend = 0; // Packets lost during this send (if any)
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	if (!iTransportChannelBlocked)
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		{
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		RMBufChain toSend;
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		iSendPool.Remove(toSend);
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		if (toSend.IsEmpty())
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			{
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			toSend.Assign(aData);
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			}
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		else
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			{
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			iSendPool.Add(aData, packetsLostThisSend);
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   111
			iPacketsLost += packetsLostThisSend;
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parents:
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   112
			}
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parents:
diff changeset
   113
			
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parents:
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   114
		DoSend(toSend);
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parents:
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   115
		}
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parents:
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   116
	else
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parents:
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   117
		{
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parents:
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   118
		iSendPool.Add(aData, packetsLostThisSend);
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parents:
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   119
		iPacketsLost += packetsLostThisSend;
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   120
		}
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parents:
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   121
	
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   122
	// If client app has previous sent pack drop IOCTL it needs to be notified
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   123
	if (iNotifyMediaPacketDroppedFlag && iPacketsLost)
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parents:
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   124
		{
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   125
		TPckgBuf<TInt> buf(iPacketsLost);
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   126
		iSAP.ServiceComplete(&buf);
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   127
		iNotifyMediaPacketDroppedFlag = EFalse;
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   128
		iPacketsLost = 0;
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   129
		}
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parents:
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   130
		
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   131
	return requestedToSend;
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   132
	}
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   133
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   134
// if pools become nicely generic then we could move this sending stuff to base class
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   135
// and have sessions just configure the Tx, Rx pools
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   136
void CMediaSession::DoSend(RMBufChain& aData)
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   137
	{
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   138
	LOG_FUNC
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   139
	if (iTransportChannel->SendPacket(EMedia, aData)==0)
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parents:
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   140
		{
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   141
		// as media session, just free stale AV data (gets tricky putting stuff back on pool, and not really needed)
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parents:
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   142
		// but mark TC as blokced so we can begin buffering in future
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   143
		aData.Free();
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parents:
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   144
		iTransportChannelBlocked = ETrue;
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parents:
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   145
		}
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parents:
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   146
	}
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parents:
diff changeset
   147
	
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parents:
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   148
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   149
void CMediaSession::CanSend()
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parents:
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   150
	{
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   151
	LOG_FUNC
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parents:
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   152
	// pluck off pool
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parents:
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   153
	iTransportChannelBlocked = EFalse;
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parents:
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   154
	//RDebug::Print(_L("MBuf free %d"), CMBufManager::Context()->__DbgGetBufSpace());
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parents:
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   155
	// something was placed on the send pool - remove it and send
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parents:
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   156
	RMBufChain chain;
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parents:
diff changeset
   157
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parents:
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   158
	do
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parents:
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   159
		{
29b1cd4cb562 Revision: 200951_001
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parents:
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   160
		iSendPool.Remove(chain);
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parents:
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   161
		if (!chain.IsEmpty())
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parents:
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   162
			{
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parents:
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   163
			DoSend(chain);
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parents:
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   164
			}
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parents:
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   165
		}
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parents:
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   166
	while (!chain.IsEmpty());
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parents:
diff changeset
   167
	}
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   168
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parents:
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   169
void CMediaSession::ReceivePacketLost()
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parents:
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   170
	{
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parents:
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   171
	// Increment the packet lost count.
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parents:
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   172
	iPacketsLost++;
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parents:
diff changeset
   173
	
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parents:
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   174
	// If client app has previous sent pack drop IOCTL it needs to be notified
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parents:
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   175
	if (iNotifyMediaPacketDroppedFlag)
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   176
		{
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parents:
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   177
		TPckgBuf<TInt> buf(iPacketsLost);
29b1cd4cb562 Revision: 200951_001
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parents:
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   178
		iSAP.ServiceComplete(&buf);
29b1cd4cb562 Revision: 200951_001
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parents:
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   179
		iNotifyMediaPacketDroppedFlag = EFalse;
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parents:
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   180
		iPacketsLost = 0;
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parents:
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   181
		}
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parents:
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   182
	}
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parents:
diff changeset
   183
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   184
TInt CMediaSession::GetOption(TUint aLevel, TUint aName, TDes8& aOption) const
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parents:
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   185
	{
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parents:
diff changeset
   186
	LOG_FUNC
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parents:
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   187
	TInt ret = KErrArgument;
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parents:
diff changeset
   188
	if (aLevel == KSolBtAVDTPMedia)
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parents:
diff changeset
   189
		{
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parents:
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   190
		switch (aName)
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parents:
diff changeset
   191
			{
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parents:
diff changeset
   192
			case EAvdtpMediaGetMaximumPacketSize:
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parents:
diff changeset
   193
				{
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parents:
diff changeset
   194
				if (iTransportChannel)
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   195
					{
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parents:
diff changeset
   196
					TInt mtu;
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parents:
diff changeset
   197
					ret = iTransportChannel->MaxPacketSize(mtu);
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   198
					if (ret==KErrNone)
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parents:
diff changeset
   199
						{
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parents:
diff changeset
   200
						LOG1(_L("Media session transport channel MTU = %d"), mtu);
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   201
						TPckg<TInt> mtuBuf(mtu);
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   202
						aOption = mtuBuf;
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parents:
diff changeset
   203
						}
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   204
					}
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   205
				else
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parents:
diff changeset
   206
					{
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   207
					ret = KErrNotReady;
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parents:
diff changeset
   208
					}
29b1cd4cb562 Revision: 200951_001
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parents:
diff changeset
   209
				}
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   210
			break;
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   211
			case EAvdtpMediaGetMaximumReceivePacketSize:
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parents:
diff changeset
   212
				{
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parents:
diff changeset
   213
				if (iTransportChannel)
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   214
					{
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   215
					TInt mru;
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   216
					ret = iTransportChannel->MaxReceivePacketSize(mru);
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   217
					if (ret==KErrNone)
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   218
						{
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   219
						LOG1(_L("Media session transport channel MRU = %d"), mru);
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   220
						TPckg<TInt> mruBuf(mru);
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   221
						aOption = mruBuf;
29b1cd4cb562 Revision: 200951_001
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
diff changeset
   222
						}
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					}
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				else
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					{
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					ret = KErrNotReady;
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					}
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				}
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			break;
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			default:
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				ret = KErrNotSupported;
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			}
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		}
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   234
			
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	return ret;
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	}
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   237
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void CMediaSession::Ioctl(TUint aLevel, TUint aName, const TDesC8* /* aOption */)
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	{
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	LOG_FUNC
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	TInt res;
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parents:
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   242
	
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	if (aLevel == KSolBtAVDTPMedia)	
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		{
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		switch (aName)
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			{
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			case ENotifyAvdtpMediaPacketDropped:
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   248
				{
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				iNotifyMediaPacketDroppedFlag= ETrue;
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				res = KErrNone;
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				break;
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   252
				}
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			default:
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				{
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				res = KErrNotSupported;
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parents:
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   256
				break;
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parents:
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   257
				}
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parents:
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			}
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parents:
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		if (res!=KErrNone)
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parents:
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   260
			{
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parents:
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   261
			iSAP.Error(res);
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parents:
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   262
			}
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parents:
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   263
		}
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parents:
diff changeset
   264
	}