/*

* 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:    API (Application Programming Interface) header file

*              : for RTP (Real-time Transport Protocol) library.

*

*/

#ifndef __RTPAPI_H

#define __RTPAPI_H

//  INCLUDES

#include <rtpdef.h>

#include "srtpsession.h"

// CONSTANTS

// MACROS

// DATA TYPES

// FUNCTION PROTOTYPES

// FORWARD DECLARATIONS

class CRtpManager;

// CLASS DECLARATION

/**

*  API (Application Programming Interface) class for RTP (Real-time Transport

*  Protocol) library.

*

*  @lib RtpService.dll

*/

class CRtpAPI : public CBase

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        */

        IMPORT_C static CRtpAPI* NewL( MRtpErrNotify& aErrNotify );

        /**

        * Destructor.

        */

        virtual ~CRtpAPI();

    public: 

        /**

        * Open and initialize the CRtpAPI object.

        * @param aSdesInfo - [input] SDES (Source Description)

        *   of the local participant (CName, Username, etc.)

        * @param aRtpPacketDll - [input] Path+file name of RTP packet

        *   formatting DLL to use; NULL to use standard RTP packet format

        *   Ownership is transfered.

        * @param aRConnPtr - [input] Network connection to use;

        *   NULL to use default network connection. Ownership is transfered.

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt OpenL( const TRtpSdesParams& aSdesInfo,

                             const TDesC* aRtpPacketDll,

                             const RSocketServ* aSocketServPtr,

                             const RConnection* aConnPtr );

        /**

        * Open and initialize the CRtpAPI object.

        * @param aIapId - [input] IAP ID. If -1, no IAP selection dialog

        *   will pop up. Instead, the default IAP will be used.

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt StartConnection( TInt aIapId = -1 );

        /**

        * Open and initialize the CRtpAPI object in asynchronous mode

        * @param aStatus - [output] On completion, will contain a status code:

        *   KErrNone if successful; system wide error code otherwise.

        * @param aIapId - [input] IAP ID. If -1, no IAP selection dialog

        *   will pop up. Instead, the default IAP will be used.

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt StartConnection( TRequestStatus& aStatus,

                                       TInt aIapId = -1 );

        /**

        * Cancels asynchoronous start of connection.

        * Any open requests will be completed with KErrCancel.

        * @return None

        */

        IMPORT_C void CancelStart(); 

        /**

        * Close the CRtpAPI object.

        * @param None

        * @return None

        */

        IMPORT_C void Close();

        /**

        * Set SDES (Source Description) information of the local participant.

        * Participant is defined as an application program and

        * only one local participant is allowed.

        * @param aSdesInfo - [input] SDES of the local participant

        *   (CName, Username, etc.).

        * @return None

        */

        IMPORT_C void SetLocalSdes( const TRtpSdesParams& aSdesInfo );

        /**

        * Get the local IP address

        * @param None

        * @return local ip address.

        */

        IMPORT_C TInetAddr& GetLocalIPAddressL();

        /**

        * Create a new RTP Session and return the Session ID as well as the

        * local port number assigned for RTP. RTP uses an even port number and

        * RTCP, if enabled, uses the next higher (odd) port number.

        * @param aSessionParams - [input] Session parameters

        * @param aPort - [input] Local port number to use for RTP;

        *                               0 to use default port number

        *                     - [output] port number assigned for RTP

        * @param aEnableRtcp - [input] ETrue to enable RTCP; EFalse to disable

        * @param aRtcpParams - [input] RTCP parameters to use;

        *    NULL to use default RTCP parameters

        * @return Identifier (ID) of RTP Session created if successful;

        *    KNullId otherwise

        */

        IMPORT_C TRtpId CreateSessionL(

                            const TCreateSessionParams& aSessionParams,

                            TUint& aPort,

                            TBool aEnableRtcp,

                            const TRtcpParams* aRtcpParams );

        /**

        * Create a new, secure RTP Session and return the Session ID as well as the

        * local port number assigned for RTP. RTP uses an even port number and

        * RTCP, if enabled, uses the next higher (odd) port number.

        * User is expected to create corresponding SRTP session prior to calling this

        * function. 

        * @param aSessionParams - [input] Session parameters

        * @param aPort - [input] Local port number to use for RTP;

        *                               0 to use default port number

        *                     - [output] port number assigned for RTP

        * @param aEnableRtcp - [input] ETrue to enable RTCP; EFalse to disable

        * @param aRtcpParams - [input] RTCP parameters to use;

        *    NULL to use default RTCP parameters

        * @param aSession - [input] SRTP session to be used by this RTP session.

        * @return Identifier (ID) of RTP Session created if successful;

        *    KNullId otherwise

        */

        IMPORT_C TRtpId CreateSessionL( 

	                const TCreateSessionParams& aSessionParams, 

	                TUint& aPort, 

	                TBool aEnableRtcp, 

	                const TRtcpParams* aRtcpParams, 

	                CSRTPSession& aSession); 

        /**

        * Start an RTP Session. If enabled, RTCP associated with the given

        * session is also started.

        * @param aSessionId - [input] Session ID

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt StartSession( TRtpId aSessionId );

        /**

        * Close an RTP Session.

        * @param aSessionId - [input] Session ID

        * @return None

        */

        IMPORT_C void CloseSession( TRtpId aSessionId );

        /**

        * Set remote IP address and port number to RTP Session.

        * Port number for RTP must be an even number and the corresponding

        * RTCP, if enabled, will be set to use the next higher (odd) port.

        * @param aSessionId - [input] RTP Session ID

        * @param aRemoteAddr - [input] Remote IP address & port number for RTP

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SetRemoteAddress( TRtpId aSessionId,

                                        const TInetAddr& aRemoteAddr );

        /**

        * Set remote RTCP IP address and port number to RTP Session accoring to RFC 3605

        * i.e. this should be used if RTCP port is different than RTP port + 1

        * @param TRtpId aSessionId - [input] RTP Session ID

        * @param TInetAddr& aRemoteAddr - [input] Remote IP address & port

        *                                 number for RTP

        * @return TInt - KErrNone if successful; KErrNotFound if invalid session id;

        *				 KErrNotSupported if RTCP disabled; system wide error code otherwise

        */

        IMPORT_C TInt SetRemoteRtcpAddress( TRtpId aSessionId, const TInetAddr& aRemoteRtcpAddr );

        /**

        * Create a Receive stream for an RTP Session and return the stream

        * ID which is unique for all RTP Sessions.

        * @param aSessionId - [input] RTP Session ID

        * @param aParams - [input] Receive stream parameters

        * @return Stream ID if successful; KNullId otherwise

        */

        IMPORT_C TRtpId CreateReceiveStreamL( TRtpId aSessionId,

                            const TRcvStreamParams& aParams );

        /**

        * Create a Transmit stream for an RTP Session and return the stream

        * ID which is unique for all RTP Sessions. SSRC value assigned for the

        * very first Transmit stream will be the same as the default SSRC

        * value reserved internally by CreateSession function. This function

        * is normally used to create a transmit stream where SSRC value is

        * randomly generated.

        * @param aSessionId - [input] RTP Session ID

        * @param aParams - [input] Transmit stream parameters

        * @param aSSRC - [output] SSRC value assigned

        * @return Stream ID if successful; KNullId otherwise

        */

        IMPORT_C TRtpId CreateTransmitStreamL( TRtpId aSessionId,

                            const TTranStreamParams& aParams,

                            TRtpSSRC& aSSRC );

        /**

        * Create a Transmit stream, with a given SSRC value, for an RTP Session

        * and return the stream ID which is unique for all RTP Sessions. This

        * extended function is used for a special case where a specific SSRC

        * value needs to be associated with the transmit stream being created,

        * e.g. for retransmission purpose.

        * @param aSessionId - [input] RTP Session ID

        * @param aParams - [input] Transmit stream parameters

        * @param aSsrc - [input] SSRC value to use

        * @return Stream ID if successful; KNullId otherwise

        */

        IMPORT_C TRtpId CreateTransmitStreamExtL( TRtpId aSessionId,

                            const TTranStreamParams& aParams,

                            const TRtpSSRC aSSRC );

        /**

        * Close a Transmit or Receive stream.

        * @param TRtpId aStreamId - [input] ID of stream to close

        * @return None

        */

        IMPORT_C void CloseStream( TRtpId aStreamId );

        /**

        * Register a callback object for receiving RTP data packets from an RTP

        * Session. Only one receiver callback object is allowed to be

        * registered for one Session.

        * MRtpObserver::RtpPacketReceived function from aRtpObserver object is

        * called when an RTP data packet is received.

        * @param aSessionId - [input] RTP Session ID

        * @param aRtpObserver - [input] Callback object to receive RTP packets

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt RegisterRtpObserver( TRtpId aSessionId,

                                           MRtpObserver& aRtpObserver );

        /**

        * Unregister RTP observer callback object associated with an RTP

        * session.

        * @param aSessionId - [input] RTP Session ID

        * @return None

        */

        IMPORT_C void UnregisterRtpObserver( TRtpId aSessionId );

        /**

        * Sets/resets the observer for the non-RTP data.

        * Only one receiver callback object is allowed to be

        * registered for one Session.

        * MNonRTPDataObserver::NonRTPDataReceived or

        * MNonRTPDataObserver::NonRTCPDataReceived from 

        * aNonRTPDataObserver object is

        * called when a non-RTP data packet is received.

        * @param aNonRTPDataObserver an observer, 0-pointer resets the observer

        * @return KErrNotFound if non-existing session-ID provided, system-wide error code otherwise. KErrNone if successfull.

        */

        IMPORT_C TInt SetNonRTPDataObserver( TRtpId aSessionId, 

                                    MNonRTPDataObserver* aNonRTPDataObserver );

        /**

        * Send an RTP data packet in a Transmit stream synchronously.

        * @param aTranStreamId - [input] ID of Transmit stream

        * @param aHeaderInfo - [input] Header information of RTP data packet

        * @param aPayloadData - [input] Payload data of RTP data packet

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtpPacket( TRtpId aTranStreamId,

                                     const TRtpSendHeader& aHeaderInfo,

                                     const TDesC8& aPayloadData );

        /**

        * Send an RTP data packet in a Transmit stream asynchronously.

        * @param TRtpId aTranStreamId - [input] ID of Transmit stream

        * @param aHeaderInfo - [input] Header information

        *                                      of RTP data packet to send

        * @param aPayloadData - [input] Payload data of RTP data packet to send

        * @param aStatus - [output] On completion, will contain a status code:

        *    KErrNone if successful; system wide error code otherwise

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtpPacket( TRtpId aTranStreamId,

                                     const TRtpSendHeader& aHeaderInfo,

                                     const TDesC8& aPayloadData,

                                     TRequestStatus& aStatus );

        /**

        * Send an RTP data packet asynchronously, with a given sequence number,

        * in a Transmit stream mainly for retransmission purpose.

        * @param aTranStreamId - [input] ID of Transmit stream

        * @param aSequenceNum - [input] Sequence number to use

        * @param aHeaderInfo - [input] Header information of RTP data packet

        * @param aPayloadData - [input] Payload data of RTP data packet to send

        * @param aStatus - [output] On completion, will contain a status code:

        *    KErrNone if successful; system wide error code otherwise

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtpPacket( TRtpId aTranStreamId,

                                     TRtpSequence aSequenceNum,

                                     const TRtpSendHeader& aHeaderInfo,

                                     const TDesC8& aPayloadData,

                                     TRequestStatus& aStatus );

        /**

        * Send a non-RTP (control) data packet asynchronously

        * @param aSessionId - [input] RTP Session ID

        * @param aUseRTPSocket - [input] use RTP/RTCP socket

        * @param aData - [input] non-RTP data packet to send

        * @param aStatus - [output] On completion, will contain a status code:

        *    KErrNone if successful; system wide error code otherwise

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C void SendDataL( TRtpId aSessionId,

                                TBool aUseRTPSocket,

                                const TDesC8& aData,

                                TRequestStatus& aStatus );

        /**

        * Cancel an outstanding SendRtpPacket() operation.

        * @param TRtpId aSessionId - [input] RTP Session ID

        * @return None

        */

        IMPORT_C void CancelSend( TRtpId aSessionId );

        /**

        * Register a callback object for receiving RTCP packets associated with

        * a given RTP Session. Only one observer callback object is allowed to

        * be registered. One of aRtcpObserver object's callback functions is

        * called when an RTCP packet of that type is received.

        * @param aSessionId - [input] RTP Session ID

        * @param aObserver - [input] Callback object to receive RTCP packets

        * @return KErrNone if successful; system wide error code otherwise.

        */

        IMPORT_C TInt RegisterRtcpObserver( TRtpId aSessionId,

                                            MRtcpObserver& aRtcpObserver );

        /**

        * Unregister RTCP observer callback object associated with an RTP

        * session.

        * @param aSessionId - [input] RTP Session ID

        * @return None

        */

        IMPORT_C void UnregisterRtcpObserver( TRtpId aSessionId );

        /**

        * Send an RTCP BYE packet for a Transmit stream.

        * @param aTranStreamId - [input] Transmit stream ID

        * @param aReason - [input] Reason for leaving

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtcpByePacket( TRtpId aTranStreamId,

                                         const TDesC8& aReason );

        /**

        * Send an RTCP APP packet for a Transmit stream.

        * @param TRtpId aTranStreamId - [input] Transmit stream ID

        * @param TRtcpApp aApp - [input] APP packet to send

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtcpAppPacket( TRtpId aTranStreamId,

                                         const TRtcpApp& aApp );

        /** 

        * Send an RTCP RR packet for a Reception stream.

        * @param TRtpId aRcvStreamId - [input] Reception stream ID

        * @return TInt - KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtcpRrPacket( TRtpId aRcvStreamId );

        /** 

        * Send an RTCP SR packet for a Transmit stream.

        * @param TRtpId aTranStreamId - [input] Transmit stream ID

        * @return TInt - KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SendRtcpSrPacket( TRtpId aTranStreamId );

		/** 

        * Suspend RTCP sending on/off, calculations will continue. 

        * @param TRtpId aSessionId - [input] RTP Session ID

        * @param TBool aAutoSending - [input] Auto sending flag. 

        *							  ETrue:  RTCP sending will be scheduled normally

        *							  EFalse: RTCP sending will be suspended

        * @return TInt - KErrNone if successful; KErrNotFound if invalid session id;

        *				 KErrNotSupported if RTCP disabled;  system wide error code otherwise				

        */

        IMPORT_C TInt SuspendRtcpSending( TRtpId aSessionId, TBool aAutoSending );

		/** 

        * Gets the status of automatic RTCP sending.

        * @param TRtpId aSessionId - [input] RTP Session ID

        * @param TBool aAutoSending - [output] ETrue: RTCP auto sending is on 

        *				  					   EFalse: RTCP auto sending is off

 		* @return TInt - KErrNone if successful; KErrNotFound if invalid session id;

        *				 KErrNotSupported if RTCP disabled;  system wide error code otherwise

        */

        IMPORT_C TInt IsRtcpSendingSuspended( TRtpId aSessionId, TBool& aAutoSending );

        /**

        * Get the session ID of a stream, which belongs to that session.

        * @param aStreamId - [input] ID of a stream

        * @return Identifier (ID) of RTP Session if found; KNullId otherwise

        */

        IMPORT_C TRtpId GetSessionId( TRtpId aStreamId );

        /**

        * Get address of Socket object used by a given RTP Session

        * to send/receive RTP data packets.

        * @param aSessionId - [input] RTP Session ID

        * @return Address of Socket object used if successful; NULL otherwise

        */

        IMPORT_C RSocket* GetRtpSocket( TRtpId aSessionId );

        /**

        * Get address of Socket object used by a given RTP Session

        * to send/receive RTCP control packets.

        * @param aSessionId - [input] RTP Session ID

        * @return Address of Socket object used if successful; NULL otherwise

        */

        IMPORT_C RSocket* GetRtcpSocket( TRtpId aSessionId );

        /**

        * Retrieve statistical information for a stream

        * based on the reports from RTCP SR & RR packets.

        * @param aStreamId - [input] ID of stream

        * @param aStat - [output] Statistical information

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt GetStreamStatistics( TRtpId aStreamId,

                                           TRtpPeerStat& aStat );

        /**

        * Get sampling rate setting for a payload type.

        * @param aPayloadType - [input] Payload type

        * @return Sampling rate in Hz; 0 if payload type setting not found

        */

        IMPORT_C TUint32 GetSamplingRate( TUint8 aPayloadType );

        /**

        * Set sampling rate for a payload type.

        * @param aPayloadType - [input] Payload type

        * @param aSamplingRate - [input] Sampling rate in Hz

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SetSamplingRate( TUint8 aPayloadType,

                                       TUint32 aSamplingRate );

        /**

        * Set RTCP parameters for a given RTP Session.

        * This function does nothing if RTCP was not enabled previously.

        * @param aSessionId - [input] RTP Session ID

        * @param aRtcpParams - [input]  RTCP parameters to use

        * @return KErrNone if successful; system wide error code otherwise

        */

        IMPORT_C TInt SetRtcpParameters( TRtpId aSessionId,

                                         const TRtcpParams& aRtcpParams );

        /**

        * Synchronous custom command interface for future extensions.

        * Input/output data and return value are defined by each custom command

        * @param aFunction - [input] Function ID

        * @param aInputData1 - [input] Input data #1; NULL if not used

        * @param aInputData2 - [input] Input data #2; NULL if not used

        * @param aOutputData - [output] Output data; NULL if not used

        * @return Defined by the function

        */

        IMPORT_C TInt CustomCommandSync( TInt aFunction,

                                         const TDesC8& aInputData1,

                                         const TDesC8& aInputData2,

                                         TDes8& aOutputData );

        /**

        * ASynchronous custom command interface for future extensions.

        * Input/output data and return value are defined by each custom command

        * @param aFunction - [input] Function ID

        * @param aInputData1 - [input] Input data #1; NULL if not used

        * @param aInputData2 - [input] Input data #2; NULL if not used

        * @param aOutputData - [output] Output data; NULL if not used

        * @param aStatus - [output] On completion, will contain a status code:

        *    KErrNone if successful; system wide error code otherwise

        * @return Defined by the function

        */

        IMPORT_C TInt CustomCommandAsync( TInt aFunction,

                                          const TDesC8& aInputData1,

                                          const TDesC8& aInputData2,