rtp/rtpstack/inc/rtptranstream.h
author Petteri Saari <petteri.saari@digia.com>
Thu, 25 Nov 2010 13:59:42 +0200
branchMSRP_FrameWork
changeset 58 cdb720e67852
parent 0 307788aac0a8
child 29 5f12516512fa
permissions -rw-r--r--
This release addresses the following issues: 1. The crash bug fix when receiving file 2. Now the sending is based on MSRP messages, there is no longer file receiving or sending. Client sends data as MSRP was designed. 3. Soma MSRP stack was created so that the client told the correct session-id, Symbian stack generated it by itself. This is not allowed, it was changed so that clients tell the session-id (same as used in SIP INVITE). 4. Unnecessary division of data to chunks removed when there is no need to interrupt sending. The message is sent in as few chunks as possible. 5. Stack can now receive files and chunks with ?unlimited? size. Old stack wrote the incoming data to memory and did not utilize disk space until the end of chunk was reached (large chunks from another client crashed it). 6. Now when writing the incoming data to file, it will take into account the byte-range header values. So, this complies with the RFC4975 requirements that stack must be able to handle chunks that come in any sequence. 7. Some buffering changes to outgoing/incoming data. 8. The outgoing data is now checked that it does not contain the created transaction-id before sending the data. 9. MSRP success reports are now implemented and tested against servers. 10. Progress report system fixed so progress is now visible on client (all the way to 100%). 11. Message Cancel receiving / Cancel sending now corrected and made to work as rfc4975 requires. (termination from sender and error code from receiver when cancelling). 12. Bug correction related to messages received not belonging to any session, old stack implementation did send error response, but after response was written it did give the buffer to client anyway. Now corrected.

/*
* Copyright (c) 2004-2005 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:    
*
*/





#ifndef RtpTranStream_H
#define RtpTranStream_H

#include "rtpstream.h"


/**
*  Derived class for RTP transmit stream. 
*
*  @lib RtpService.dll
*/
class CRtpTranStream : public CRtpStream
    {
    #if defined( _DEBUG ) && defined( RTP_UNIT_TEST )
	    //Friend class used for testing
	    friend class CRtpUtRtpStream; 
    #endif 
    public:
        static CRtpTranStream* NewL( const TRtpPayloadType aPayloadType,
                                     const TRtpId aSessionID,
                                     const TRtpId aTranStreamID,
                                     const TRtpSSRC aSSRC,
                                     MRtcpObserver* aObserver,
                                     const TUint32* aProfileRTPTimeRates );
        ~CRtpTranStream();

        TInt BuildRtpPacket( const TRtpSendHeader& aHeaderInfo,
                             const TDesC8& aPayloadData,
                             TRtpSequence aSeqNum,
                             TBool aSetSeqNum,
                             CRtpPacket* aPktSnd );

        TInt BuildRtcpBYEPacket( const TDesC8& aReason,
                                 CRtpPacket* aPktRtcpSnd );

        TInt BuildRtcpAPPPacket( const TRtcpApp& aApp,
                                 CRtpPacket* aPktRtcpSnd );

        inline TBool SentRTPPackets() const { return iFlagSentRTPPackets; };
        inline void SetSentRTPPackets( TBool aFlag )
            {
            iFlagSentRTPPackets = aFlag;
            };

        inline TBool SentRtcpReport() { return iFSentRtcpReport; };
        inline void SetRtcpReportFlag() { iFSentRtcpReport = ETrue; };
        inline void ResetRtcpReportFlag() { iFSentRtcpReport = EFalse; };
        inline void SetBandwidth( TUint32 aBandwidth ) 
            { 
            iRtcpStats.iRtcpReceiverStats.iTxBandwidth = aBandwidth;
            }; 

    public: // from CRtpStream
        TInt ResetStreamStat();
        TInt GetStreamStat( TRtpPeerStat& aStat );
        TRtpRtcpEnum RtpStreamProcessRtcpReportSectionL( CRtpPacket* aPkt );
        void RtpStreamCreateRtcpReportSection( CRtpPacket* aPkt );

    private:
        CRtpTranStream( const TRtpPayloadType aPayloadType,
                        const TRtpId aSessionId,
                        const TRtpId aStreamId,
                        const TRtpSSRC aSSRC,
                        MRtcpObserver* aRtcpObserver,
                        const TUint32* aProfileRTPTimeRates );
        void ConstructL();

        inline void IncCumNumOctetsSent( TUint32 aInc ) 
            {
            iCumNumOctetsSent += aInc;
            iSN_size[iSeqNum % KSNMaxArray] = iCumNumOctetsSent;
            };

        void RtpStreamSyncInit( TRtpTimeStamp initTimeStamp );
        TUint32 RtpStreamSyncGetRoundTripDelay( TUint32 lastSRTimeStamp,
                                                TUint32 delaySinceLSR );
        void RtpStreamSyncCurrent( TRtpTimeSync* aSyncInfoCurrent );

        /**
         * Makes an estimate of the Tx and Rx bandwidths.
         * NOTE: This is just a simple estimate, which assumes the following:
         * - this is an end-to-end session
         * - the sessions and streams are set up before traffic starts
         * - the payload bitrate is constant
         * The result of this estimation should not be used in any other
         * contexts.
         */
        void EstimateBandWidths( TUint32 aCurrentTime );

    private:
        // flag to indicate if a packet was sent since last RTCP packet
        TBool iFlagSentRTPPackets;

        // time of previous RTCP packet sent
        TUint32 iPreviousTime;

        // remote bandwidth
        TUint32 iRemoteBandwidth;

        // previous remote sequence number
        TUint32 iPreviousRemoteSN;

        // time of previous RTCP packet received
        TUint32 iPrevRemoteTime;

        // number of bytes sent
        TUint32 iCumNumOctetsSent;

        // keeps track of how many bytes were received by the receiver
        TUint32 iCumNumOctetsReceived;

        // previous value of cumNumOctetsSent
        TUint32 iCumNumOctetsSent_last;

        // keeps track of the total bytes sent
        TUint32 iSN_size[KSNMaxArray];

        // if ETrue, then packet sequence number is given by application
        TBool iFSetSeqNum;

        // flag that indicates if an RTCP Packet has been sent
        TBool iFSentRtcpReport; 
     private:    
	    #ifdef EUNIT_TESTING
		  	friend class UT_CRtpSession;
			friend class UT_CRtpStream;
			friend class UT_CRtpSessionSrtp;
		#endif     	    
            
    };


#endif	// RtpTranStream_H