examples/MultimediaProtocols/RTPExample/src/RTPFileStreamer.cpp

// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).
// All rights reserved.
// License: "Symbian Foundation License v1.0" to Symbian Foundation
// members and "Symbian Foundation End User License Agreement v1.0"
// to non-members at the URL
// "http://www.symbianfoundation.org/legal/licencesv10.html".
//
// Initial Contributors:
// Nokia Corporation - initial contribution.
//
// Contributors:
//
// Description:
//

#include "RTPFileStreamer.h"
#include <commdbconnpref.h>

_LIT(KGreetingText,"Welcome to RTP source file dump!\n");

void CRtpFileSender::ConstructL(const TDesC& aSrcFilename)
        {                       
        User::LeaveIfError(iFile.Replace(iFs,aSrcFilename,EFileWrite|EFileStreamText));
        TPtrC8 representation((TUint8*)(&KGreetingText)->Ptr(), (&KGreetingText)->Size());
        User::LeaveIfError(iFile.Write(representation));
        User::LeaveIfError(iFile.Flush());
        iFile.Close(); 
        
        User::LeaveIfError(iFile.Open(iFs,aSrcFilename,EFileRead|EFileWrite|EFileStreamText));
        iSendSrc = iSession.NewSendSourceL();
        iSendSrc.SetDefaultPayloadSize(iPacketSize);
        
        iSendSrc.PrivRegisterEventCallbackL(ERtpSendSucceeded, (TRtpCallbackFunction)CRtpFileSender::PacketSent, this);
        iSendSrc.PrivRegisterEventCallbackL(ERtpSendFail, (TRtpCallbackFunction)CRtpFileSender::SendError, this);

        iSendPacket = iSendSrc.NewSendPacketL();

        CActiveScheduler::Add(this);
        }

void CRtpFileSender::PacketSent(CRtpFileSender* aPtr, const TRtpEvent& aEvent)
        {
        aPtr->DoPacketSent(aEvent);
        }
        
void CRtpFileSender::DoPacketSent(const TRtpEvent& /*aEvent*/)
        {
        if (iObserver)
                {
                iObserver->NotifyPacketSent();
                }
        iSendIntervalTimer.After(iStatus,TTimeIntervalMicroSeconds32(iDelayMicroSecs));
        SetActive();
        }

void CRtpFileSender::SendError(CRtpFileSender* aPtr, const TRtpEvent& aEvent)
        {
        aPtr->DoSendError(aEvent);
        }
        
void CRtpFileSender::DoSendError(const TRtpEvent& /*aEvent*/)
        {
        if (iObserver)
                {
                iObserver->NotifyError();
                }
        }
                
CRtpFileSender::~CRtpFileSender()
        {
        Cancel();
        iFile.Close();
        iSendIntervalTimer.Close();
        iSendPacket.Close();
        iSendSrc.Close();
        }
CRtpFileSender* CRtpFileSender::NewL(RRtpSession& aSession,RFs& aFs,const TDesC& aSrcFilename, TInt aPacketSize, TInt aDelayMicroSeconds)
        {
        if (!aSession.IsOpen())
                {
                User::Leave(KErrArgument);
                }
        CRtpFileSender* self = new (ELeave) CRtpFileSender(aSession,aFs,aPacketSize,aDelayMicroSeconds);
        CleanupStack::PushL(self);
        self->ConstructL(aSrcFilename);
        CleanupStack::Pop(self);
        return self;
        }
CRtpFileSender::CRtpFileSender(RRtpSession& aSession,RFs& aFs,TInt aPacketSize, TInt aDelayMicroSeconds) :
        CActive(0), iDelayMicroSecs(aDelayMicroSeconds), iPacketSize(aPacketSize), 
        iSession(aSession), iPayloadDesC(NULL,NULL), iFs(aFs)
        {
        }
void CRtpFileSender::StartL()
        {
        User::LeaveIfError(iSendIntervalTimer.CreateLocal());
        iSendIntervalTimer.After(iStatus,TTimeIntervalMicroSeconds32(iDelayMicroSecs));
        SetActive();
        }
        
void CRtpFileSender::RunL()
        {
        iSendPacket.SetTimestamp(User::FastCounter());
        iPayloadDesC.Set(const_cast<TUint8*>(iSendPacket.WritePayload().Ptr()),iPacketSize,iPacketSize);
        User::LeaveIfError(iFile.Read(iPayloadDesC));
        if (iPayloadDesC.Length()>0)
                {
                TInt tmp = iPayloadDesC.Length();
                iSendPacket.WritePayload().SetLength(tmp);
                iSendPacket.Send();
                }
        else
                {
                if (iObserver)
                        {
                        iObserver->NotifyComplete();
                        }
                }       
        }
void CRtpFileSender::DoCancel()
        {
        iSendIntervalTimer.Cancel();
        }
CRtpFileStreamer::CRtpFileStreamer(RSocketServ& aSocketServ, const TInetAddr& aDestAddr, TUint aLocalPort) :
      iSocketServ(aSocketServ),
      iDestAddr(TInetAddr(aDestAddr)),
      iLocalPort(aLocalPort)
        {
        }
CRtpFileStreamer* CRtpFileStreamer::NewL(RSocketServ& aSocketServ,
                                                                                        const TDesC& aSrcFilename,
                                                                                        const TDesC& aDestFilename, 
                                                                                        TInt aBlockLen,
                                                                                        const TInetAddr& aDestAddr,
                                                                                        TUint aLocalPort, TInt aConnId)
        {
        CRtpFileStreamer* self = new (ELeave) CRtpFileStreamer(aSocketServ,aDestAddr,aLocalPort);
        CleanupStack::PushL(self);
        self->ConstructL(aSrcFilename,aDestFilename,aBlockLen,10000,aConnId);
        CleanupStack::Pop(self);
        return self;
        }

void CRtpFileStreamer::ConstructL(const TDesC& aSrcFilename, const TDesC& aDestFilename, TInt aPacketSize, TInt aDelayMicroSeconds, TInt aConnId)
        {
        
        User::LeaveIfError(iRFs.Connect());
        iRFs.CreatePrivatePath(RFs::GetSystemDrive());
        iRFs.SetSessionToPrivate(RFs::GetSystemDrive());
        User::LeaveIfError(iDestFile.Replace(iRFs,aDestFilename,EFileWrite));
        TInetAddr localAddr;
        localAddr.SetPort(iLocalPort);
        _LIT8(KCname, "test");
                
        if (aConnId!=KErrNotFound)
                {
                User::LeaveIfError(iConnection.Open(iSocketServ));
                TCommDbConnPref prefs;
                prefs.SetIapId(aConnId);
                prefs.SetDialogPreference(ECommDbDialogPrefDoNotPrompt);
                TRequestStatus stat;
                iConnection.Start(prefs, stat);
                User::WaitForRequest( stat );
        User::LeaveIfError( stat.Int() );
                iRtpSession.OpenL(iSocketServ, localAddr,iDestAddr,aPacketSize+12,iConnection, EPriorityNormal, KCname);        
                }
        else
                {
                User::LeaveIfError(iSocket.Open(iSocketServ, KAfInet,KSockDatagram, KProtocolInetUdp)); 
                User::LeaveIfError(iSocket.Bind(localAddr));
                localAddr.SetPort(iLocalPort + 1);
                User::LeaveIfError(iRtcpSocket.Open(iSocketServ, KAfInet,KSockDatagram, KProtocolInetUdp));     
                User::LeaveIfError(iRtcpSocket.Bind(localAddr));
                TRequestStatus stat;
                iSocket.Connect(iDestAddr,stat);
                User::WaitForRequest(stat);
                User::LeaveIfError(stat.Int());
                iDestAddr.SetPort(iDestAddr.Port() + 1);
                iRtcpSocket.Connect(iDestAddr,stat);
                User::WaitForRequest(stat);
                User::LeaveIfError(stat.Int());
                iRtpSession.OpenL(iSocket, aPacketSize+12, iRtcpSocket);
                iRtpSession.SetRTPTimeConversion(100, 100);
                }                               
        iRtpSession.PrivRegisterEventCallbackL(ERtpNewSource, (TRtpCallbackFunction)CRtpFileStreamer::NewSource, this);
        iSender = CRtpFileSender::NewL(iRtpSession,iRFs,aSrcFilename, aPacketSize, aDelayMicroSeconds);
        }
CRtpFileStreamer::~CRtpFileStreamer()
        {
        if (iSender)
                {
                delete iSender; 
                }
        iDestFile.Close();
        iRFs.Close();
        iRecvPacket.Close();
        iRtpRecvSrc.Close();
        iRtpSession.Close();
        iSocket.Close();
        iRtcpSocket.Close();
        }

void CRtpFileStreamer::StartL()
        {
        iSender->StartL();
        }
void CRtpFileStreamer::NewSource(CRtpFileStreamer* aPtr, const TRtpEvent& aEvent)
        {
        if (aPtr->ReceiveSrc().IsOpen())
                {
                aPtr->ReceiveSrc().Close();
                }
        TRAPD(err,
                aPtr->ReceiveSrc() = aEvent.Session().NewReceiveSourceL();
                aPtr->ReceiveSrc().PrivRegisterEventCallbackL(ERtpPacketReceived, (TRtpCallbackFunction)CRtpFileStreamer::PacketArrived, aPtr);)
        if (err!=KErrNone)
                {
                __DEBUGGER();
                }
        }
        
void CRtpFileStreamer::PacketArrived(CRtpFileStreamer* aPtr, const TRtpEvent& aEvent)
        {       
        aPtr->iRecvPacket.Close();
        aPtr->iRecvPacket = aEvent.ReceiveSource().Packet();
        if (aEvent.ReceiveSource().Packet().IsOpen())
                {
                __DEBUGGER();
                }
        TRAPD(err,aPtr->HandleReceivedPacketL());
        if (err!=KErrNone)
                {
                __DEBUGGER();
                }
        }
        
void CRtpFileStreamer::HandleReceivedPacketL()
        {
        if (iObserver)
                {
                iObserver->NotifyPacketReceived();
                }
        TPtrC8 writeDesc(iRecvPacket.Payload().Ptr(),iRecvPacket.Payload().Length());
        User::LeaveIfError(iDestFile.Write(writeDesc));
        }

---