/*

* Copyright (c) 2004-2007 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:    Writes RTP payload format containing G729 data.

*

*/

#ifndef G729PAYLOADFORMATWRITE_H

#define G729PAYLOADFORMATWRITE_H

//  INCLUDES

#include <e32base.h>

#include <mmf/server/mmfformat.h>

#include <mmf/server/mmfdatabuffer.h>

#include "rtpheader.h"

#include "formatstatemachine.h"

#include "mccinternalcodecs.h"

// FORWARD DECLARATIONS

class MMccRtpDataSink;

class CMccRtpMediaClock;

// CLASS DECLARATION

/**

*  Packetizes RTP payload containing G729 data.

*

*  @lib ?library

*  @since Series 60 3.0

*/

class CG729PayloadFormatWrite : public CPayloadFormatWrite, 

                                public MAsyncEventHandler, 

                                public MPayloadFormatWrite

    {

    public:        // Constructors and destructor

        /**

        * Two-phased constructor.

        * @param aSource    Data source configuration parameters

        */

        static   CG729PayloadFormatWrite* NewL (MDataSink* aSink);

        /**

        * Destructor.

        */

        virtual  ~CG729PayloadFormatWrite ();

    public:    

        /**

        * Configures payload format with format spesific parameters.

        * Leaves with KErrArgument if parameters are invalid.

        *

        * @since    Series 60 3.0 

        * @param    aConfigParams       Configuration parameters

        * @return   void

        */

        virtual void ConfigurePayloadFormatL( const TDesC8& aConfigParams,

                                              CMccRtpMediaClock& aClock );

    public: // From CMMFFormatEncode

        /**

        * Funtion to return time interval for the complete frame

        *

        * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo

        *

        * @return           time interval in micro seconds

        */

        virtual  TTimeIntervalMicroSeconds FrameTimeInterval(

                                                TMediaId aMediaType) const;

        /**   *** NOT SUPPORTED ***

        * Function to return the clip duration

        *

        * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo

        *

        * @return           clip duration in micro seconds

        */

        virtual  TTimeIntervalMicroSeconds Duration(

                                            TMediaId /*aMediaType*/) const;

        /**

        * Create a sink buffer for the given media

        *

        * @param aMediaId   contains the media type KUidMediaTypeAudio or 

        *                   KUidMediaTypeVideo 

        * @param aReference value of False is returned to caller if sink 

        *                   buffer is created

        * @return           Pointer to sink buffer created

        */

        virtual CMMFBuffer* CreateSinkBufferL(TMediaId aMediaId, 

                                              TBool &aReference

                                              ); 

        /**

        * Return the sink four CC code for the given media

        *

        * @param aMediaId    contains the media type KUidMediaTypeAudio or

        *                    KUidMediaTypeVideo

        * @return            FourCC code for the mediaId

        */

        virtual TFourCC SinkDataTypeCode(TMediaId aMediaId);

        /**

        * Set the sink data type to the given four CC code for the given media

        *

        * @param aSourceFourCC    fourCC code

        * @param aMediaId         contains the media type KUidMediaTypeAudio or

        *                         KUidMediaTypeVideo

        * @return                 error code KErrNotSupported if invalid media 

        *                         ID, else return KErrNone

        */

        virtual TInt SetSinkDataTypeCode(TFourCC aSinkFourCC, 

                                         TMediaId aMediaId

                                         ); 

        /**

        * Log in to the sink thread - this funtion merely passes the command to 

        * its sink clip data source object. The sink clip object will handle 

        * the thread log on procedures.

        *

        * @param aEventHandler    address of event handler

        *

        * @return                 error code returned by source clip

        */

        virtual TInt SinkThreadLogon(MAsyncEventHandler& aEventHandler);

        /**

        * Log out of the sink thread - this funtion merely passes the command to 

        * its sink clip data source object. The sink clip object will handle 

        * the thread log off procedures.

        *

        * @param

        *

        * @return

        */

        virtual void SinkThreadLogoff();

        /**

        * Empty the given source buffer.

        *

        * @param aBuffer    data buffer containing G.711 frames

        * @param aSupplier  data source pointer

        * @param aMediaId   contains the media type KUidMediaTypeAudio or 

        *                   KUidMediaTypeVideo

        * @return

        */

        virtual void EmptyBufferL(CMMFBuffer* aBuffer, 

                                  MDataSource* aSupplier, 

                                  TMediaId aMediaId

                                  );

        /**

        * Called after the data buffer is written. Update the number of bytes 

        * written and the current write position for the next write operation. 

        *

        * @param aBuffer       data buffer emptied

        *

        * @return

        */

        virtual void BufferEmptiedL(CMMFBuffer* aBuffer);

        /**

        * Accessor funtion to return the number of channels

        *

        * @param    

        *

        * @return  Number of channels

        */

        virtual TUint NumChannels();

        /**

        * Accessor funtion to return the sampling rate

        *

        * @param    

        *

        * @return Sampling rate

        */

        virtual TUint SampleRate();

        /**

        * Set the samplerate to the given value.

        *

        * @param aSampleRate

        *

        * @return error code KErrNotSupported if invalid samplerate, else 

        *         return KErrNone

        */

        virtual TInt SetSampleRate(TUint aSampleRate);

        /**

        * No implementation required for encoder.

        *

        * @param   Not used

        *

        * @return  KErrNone

        */

        virtual TInt SendEventToClient(const TMMFEvent& /*aEvent*/) 

            {return KErrNone;}

    public: // From MDataSink

        /**

        * From MDataSink Primes the source.

        * @since 

        * @param

        * @return

        */

        virtual void SinkPrimeL();

        /**

        * From MDataSink Plays the source.

        * @since 

        * @param

        * @return

        */

        virtual void SinkPlayL();

        /**

        * From MDataSink Pauses the source.

        * @since 

        * @param

        * @return

        */

        virtual void SinkPauseL();

        /**

        * From MDataSink Stops the source.

        * @since 

        * @param

        * @return

        */

        virtual void SinkStopL();

    public: // From MPayloadFormatWrite

        /**

        * Empty the source buffer by formatting the iLBC frames into RTP payload.

        * Source buffer is given in "iBuffer".

        * Called by the state machine.

        * @since 

        * @param None

        */

        void EmptySourceBufferL();

        /**

        * Hanlde the event that source buffer has been emptied.

        * Source buffer is given in "iBuffer".

        * Called by the state machine.

        * @since 

        * @param None

        */

        void SourceBufferEmptiedL();

    protected:  // New functions

    protected:  // Functions from base classes

    private: // New functions

        /**

        * Prepare packet header and deliver the packet to the datasink.

        * @since 

        * @param aPayload Payload to deliver to the datasink.

        * @return

        */

        void DeliverPacketL( CMMFDataBuffer& aPayload );

        /**

        * Create a sink buffer of the given size.

        *

        * @param   aSize     size of sink buffer to create

        *

        * @return  Pointer to sink buffer created

        */

        CMMFDataBuffer* CreateSinkBufferOfSizeL(TUint aSize); 

        /**

        * Does bit-packing for encoded speech parameters got from encoder so

        * that codec data conforms to G729 RTP payload format.

        * @since    Series 60 3.0

        * @param    aSourceBuf             Source buffer where to read from

        * @param    aDestBuf               Destination buffer where to place bit-packed data

        * @param    aIsCNoise              Indicates does source buf contain comfort noise

        * @return   System wide error code.

        */

        TInt DoBitPacking( const TDesC8& aSourceBuf,

                           TDes8& aDestBuf,

                           TBool aIsCNoise ) const;

        /**

         * Update payload format with format spesific parameters.

         * Leaves with KErrArgument if parameters are invalid.

         *

         * @since    Series 60 3.0 

         * @param    aCodecInfo       Configuration parameters

         * @return   void

         */

        void UpdateConfigurationL( const TMccCodecInfo& aCodecInfo );                   

    private:

        /**

        * C++ default constructor.

        */

        CG729PayloadFormatWrite ();

        /**

        * By default Symbian 2nd phase constructor is private.

        *

        * @param aConf    Decoder Configuration params

        */

        void     ConstructL (MDataSink* aSource);

    private: // Data

        // fourCC

        TFourCC iFourCC;

        // Format encoding state machine

        CFormatEncodeStateMachine* iStateMachine;

        // Pointer to source data buffer, passed from MCPDataPath

        CMMFDataBuffer* iSourceBuffer;

        // Sink buffer to hold G729/RTP payload

        CMMFDataBuffer* iSinkBuffer; 

        // RTP header used for sending RTP packet

        TRtpSendHeader iRtpSendHeader;

        // Data sink capable to receive RTP data

        MMccRtpDataSink* iRtpDataSink;

        // Frames per RTP packet (packetization rate)

        TUint iFramesPerPacket;

        // Counter for determining are all frames/samples got for RTP packet

        TInt iFrameIndex;        

        // Frame time interval in micro seconds

        TTimeIntervalMicroSeconds iFrameTimeInterval;

        // Current media type

        TMediaId iMediaId;

        // Flag to indicate whether to set MARK field to be 1 (the first 

        // packet in a talk spurt should have MARK field set)

        TBool iFirstPacketFinished;

        // Redundancy encoder used to construct redundancy RTP format packet

        CMMFFormatEncode* iRedEncoder;

        // Parameters relating to RTP data encoding

        TMccCodecInfo iCInfo;

        // Rtp Sink

        TBool iIsRtpSink;  

        // Key for Rtp media clock

        TUint32 iKey;

        /**

         * Rtp media clock instance

         * Not own.

         */

        CMccRtpMediaClock* iRtpMediaClock;

        // Friend class

        #ifdef TEST_EUNIT

            friend class UT_CG729PayloadFormatWrite;

        #endif

    };

#endif //G729PAYLOADFORMATWRITE_H

// End of File