/*

* Copyright (c) 2004-2008 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 G711 data.

*

*/

#ifndef G711PAYLOADFORMATWRITE_H

#define G711PAYLOADFORMATWRITE_H

//  INCLUDES

#include <e32base.h>

#include "formatstatemachine.h"

#include "mccinternalcodecs.h"

// FORWARD DECLARATIONS

class MMccRtpDataSink;

class CMccRtpMediaClock;

// CLASS DECLARATION

/**

*  Packetizes RTP payload containing G711 data.

*

*  @lib MccG711PlFormat.dll

*  @since Series 60 3.0

*/

class CG711PayloadFormatWrite : public CPayloadFormatWrite, public MPayloadFormatWrite

    {

    public:  // Constructors and destructor

        /**

        * Two-phased constructor.

        * @param aSource    Data source configuration parameters

        */

        static CG711PayloadFormatWrite* NewL( MDataSink* aSink );

        /**

        * Destructor.

        */

        virtual ~CG711PayloadFormatWrite();

    public: // New functions

        /**

        * 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 MPayloadFormatWrite

        /**

        * Empty the source buffer by formatting the G.711 frames into RTP payload.

        * Source buffer is given in "iBuffer".

        * Called by the state machine.

        *

        * @since    Series 60 3.0

        * @param    None

        * @return   void

        */

        void EmptySourceBufferL();

        /**

        * Handle the event that source buffer has been emptied.

        * Source buffer is given in "iBuffer".

        * Called by the state machine.

        *

        * @since    Series 60 3.0

        * @param    None

        * @return   void

        */

        void SourceBufferEmptiedL();

    public: // From CMMFFormatEncode

        /**

        * Funtion to return time interval for the complete frame

        *

        * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo

        *

        * @return           time interval in micro seconds

        */

        TTimeIntervalMicroSeconds FrameTimeInterval( TMediaId aMediaType ) const;

        /**   *** NOT SUPPORTED ***

        * Function to return the clip duration

        *

        * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo

        *

        * @return           clip duration in micro seconds

        */

        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

        */

        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

        */

        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

        */

        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

        */

        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

        */

        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

        */

        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

        */

        void BufferEmptiedL( CMMFBuffer* aBuffer );

        /**

        * Accessor funtion to return the number of channels

        *

        * @param    

        *

        * @return  Number of channels

        */

        TUint NumChannels();

        /**

        * Accessor funtion to return the sampling rate

        *

        * @param    

        *

        * @return Sampling rate

        */

        TUint SampleRate();

        /**

        * Set the samplerate to the given value.

        *

        * @param aSampleRate

        *

        * @return error code KErrNotSupported if invalid samplerate, else 

        *         return KErrNone

        */

        TInt SetSampleRate( TUint aSampleRate );

    public: // From MDataSink

        /**

        * From MDataSink Primes the source.

        * @since 

        * @param

        * @return

        */

        void SinkPrimeL();

        /**

        * From MDataSink Plays the source.

        * @since 

        * @param

        * @return

        */

        void SinkPlayL();

        /**

        * From MDataSink Pauses the source.

        * @since 

        * @param

        * @return

        */

        void SinkPauseL();

        /**

        * From MDataSink Stops the source.

        * @since 

        * @param

        * @return

        */

        void SinkStopL();

    private: // New functions

        /**

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

        * @since Series 60 3.0

        * @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 );

        /**

         * 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( TMccCodecInfo& aCodecInfo );

    private:

        /**

        * C++ default constructor.

        */

        CG711PayloadFormatWrite ();

        /**

        * 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 DataPath

        CMMFDataBuffer* iSourceBuffer;

        // Sink buffer to hold G711/RTP payload

        CMMFDataBuffer* iSinkBuffer;

        // 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;

        // Indicates are we sending comfort noise payload

        TBool iCNModeON;

        // Data sink capable to receive RTP data

        MMccRtpDataSink* iRtpDataSink;

        // 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;

    private:    // Friend classes

    #ifdef TEST_EUNIT

        // For EUnit test cases

        friend class UT_CG711PayloadFormatWrite;

    #endif

    };

#endif //G711PAYLOADFORMATWRITE_H

// End of File