multimediacommscontroller/mmccanypayloadformat/inc/anypayloadformatread.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Tue, 02 Feb 2010 01:04:58 +0200
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/*
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* Copyright (c) 2002-2005 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:    
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*
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*/
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#ifndef ANYPAYLOADFORMATREAD_H
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#define ANYPAYLOADFORMATREAD_H
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//  INCLUDES
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#include <e32base.h>
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#include <e32std.h>
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#include <mmf/server/mmfformat.h>
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#include "rtpheader.h"
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#include "formatstatemachine.h"
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#include "mccinternalcodecs.h"
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// CLASS DECLARATION
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class CMMFBuffer;
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/**
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*
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*/ 
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class CAnyPayloadFormatRead : public CPayloadFormatRead,
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                              public MPayloadFormatRead
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    {
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    public:  // Constructors and destructor
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        /**
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        * Two-phased constructor.
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        * @param aSource    Source of the data for the payload format plugin
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        */
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        static   CAnyPayloadFormatRead* NewL ( MDataSource* aSource );
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        /**
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        * Destructor.
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        */
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        virtual  ~CAnyPayloadFormatRead ( );
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    public:  // New functions
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        /**
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        * Get number of audio packets received on downlink in last talk spurt.
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        * @since Series-60 2.1
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        * @return Number of audio packets received
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        */
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        virtual TInt LastDlPacketCount( );
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        /**
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        * Cancel any requests from DataPath and Stop state machine also
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        * @since Series-60 2.1
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        * @return None
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        */
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        virtual void CancelDlRequest( );
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        /**
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        * Send full sink buffer with AMR frames to data path.
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        * Sink buffer is decided on one of the two frame buffers
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        * Called by the state machine.
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        * @since Series-60 2.1
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        * @return None
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        */
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        void SendDataToSinkL( );
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        /*
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        * Fill the sink buffer by decoding the RTP payload into AMR frames
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        * Sink buffer is decided on one of the two frame buffers
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        * Called by the state machine.
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        * @since Series-60 2.1
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        * @return None
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        */
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        void FillSinkBufferL( );
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        /**
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        * Request the RTPSource to fill the source buffer with RTP payload
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        * Source buffer is decided by the RTPSource.
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        * Called by the state machine.
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        * @since Series-60 2.1
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        * @return None
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        */
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        void FillSourceBufferL( );
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    public: // From CMMFFormatDecode
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        /**
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        * From CMMFFormatDecode. Return number of audio streams for the given
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        * media Raw audio files can only have 1 audio stream.
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        *
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        * @param    aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo
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        * @return   Number of audio streams
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        */
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        TUint Streams( TUid aMediaType ) const;
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        /**
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        * Return the frame time interval for the given media
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        *
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        * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo
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        *
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        * @return           Time interval in micro seconds
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        */
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        TTimeIntervalMicroSeconds FrameTimeInterval( TMediaId aMediaType ) const;
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        /**  *** NOT SUPPORTED ***
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        * Return the clip duration for the given media
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        *
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        * @param aMediaType KUidMediaTypeAudio or KUidMediaTypeVideo
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        *
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        * @return           Clip duration in micro seconds
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        */
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        TTimeIntervalMicroSeconds Duration( TMediaId aMediaType ) const;
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        /**
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        * From CMMFFormatDecode
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        */
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        TFourCC SinkDataTypeCode( TMediaId aMediaId );
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    public: // From MDataSource.  CAmrPayloadFormatRead is data source to the data path and AMR codec.
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        /**
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        * From MDataSource. Read the next block of data from file into the
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        * given buffer.
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        *
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        * @param aBuffer    source data buffer for the AMR-NB data read
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        * @param aConsumer  data sink pointer
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        * @param aMediaId   contains the media type KUidMediaTypeAudio or KUidMediaTypeVideo
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        *
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        * @return
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        */
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        void FillBufferL( CMMFBuffer* aBuffer, 
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                          MDataSink* aConsumer,
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                          TMediaId aMediaId );
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        /**
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        * From MDataSource. Primes the source.
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        * @since Series 60 3.0
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        * @return None
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        */
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        void SourcePrimeL( );
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        /**
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        * From MDataSource. Plays the source.
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        * @since Series 60 3.0
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        * @return None
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        */
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        void SourcePlayL( );
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        /**
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        * From MDataSource. Pauses the source.
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        * @since Series 60 3.0
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        * @return None
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        */
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        void SourcePauseL( );
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        /**
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        * From MDataSource. Stops the source.
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        * @since Series 60 3.0
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        * @return None
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        */
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        void SourceStopL( );
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        /**
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        * Create a source buffer for the given media
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        *
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        * @param aMediaId   contains the media type KUidMediaTypeAudio or KUidMediaTypeVideo
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        * @param aReference value of False is returned to caller if source buffer is created
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        *
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        * @return           Pointer to source buffer created
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        */
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        CMMFBuffer* CreateSourceBufferL( TMediaId aMediaId, 
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                                         TBool &aReference );
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        /**
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        * Create a source buffer for the given media, setting frame size to match 
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        * the given sink buffer
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        *
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        * @param aMediaId    contains the media type KUidMediaTypeAudio or KUidMediaTypeVideo
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        * @param aSinkBuffer address of sink buffer
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        * @param aReference  value of False is returned to caller if source buffer is created
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        *
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        * @return            Pointer to source buffer created
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        */
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        CMMFBuffer* CreateSourceBufferL( TMediaId aMediaId, 
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                                         CMMFBuffer& aSinkBuffer, 
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                                         TBool &aReference );
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        /**
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        * Return the four CC code for the given media
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        *
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        * @param aMediaId    contains the media type KUidMediaTypeAudio or KUidMediaTypeVideo
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        *
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        * @return            FourCC code
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        */
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        TFourCC SourceDataTypeCode( TMediaId aMediaId );
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        /**
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        * Set the source data type to the given four CC code for the given media
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        *
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        * @param aSourceFourCC    fourCC code
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        * @param aMediaId         contains the media type KUidMediaTypeAudio or KUidMediaTypeVideo
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        *
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        * @return                 error code KErrNotSupported if invalid media ID, else return KErrNone
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        */
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        TInt SetSourceDataTypeCode( TFourCC aSourceFourCC, 
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                                    TMediaId aMediaId ); 
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        /**
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        * Log in to the source thread - this funtion merely passes the command to 
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        * its source clip data source object. The source clip object will handle 
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        * the thread log on procedures.
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        *
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        * @param aEventHandler    address of event handler
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        *
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        * @return                 error code returned by source clip
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        */
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        TInt SourceThreadLogon( MAsyncEventHandler& aEventHandler );
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        /**
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        * Log out of the source thread - this funtion merely passes the command to 
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        * its source clip data source object. The source clip object will handle 
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        * the thread log off procedures.
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        *
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        * @return None
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        */
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        void SourceThreadLogoff( );
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        /**
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        * Negotiate source settings ( buffer size ) to match 
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        * given source object
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        *
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        * @param aDataSink          address of sink object
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        *
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        * @return None
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        */
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        void NegotiateSourceL( MDataSink& aDataSink );
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    public: // From MDataSink. CAmrPayloadFormatRead is data sink to the RTP data source.
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        /**
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        * Called after the data buffer is filled. Update the number of bytes read
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        * and the current read position for the next read operation. 
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        *
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        * @param    aBuffer         data buffer filled
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        * @param    aHeaderInfo     RTP packet header information
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        * @return None
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        */
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        virtual void DataBufferFilledL( CMMFBuffer* aBuffer, 
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                                    const TRtpRecvHeader& aHeaderInfo );
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    public: // only for videosource-anyformatter-filesink
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       void BufferFilledL( CMMFBuffer* aBuffer );
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    public:
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        /**
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        * Configures payload format with format spesific parameters.
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        * Leaves with KErrArgument if parameters are invalid.
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        *
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        * @since    Series 60 3.0 
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        * @param    aConfigParams       Configuration parameters
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        * @return   void
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        */
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        virtual void ConfigurePayloadFormatL( const TDesC8& aConfigParams );
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    protected:  // Functions from base classes
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    private:
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        /**
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        * C++ default constructor.
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        */
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        CAnyPayloadFormatRead();
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        /**
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        * By default Symbian 2nd phase constructor is private.
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        *
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        * @param aSource    Source of the data for the payload format plugin
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        */
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        void ConstructL( MDataSource* aSource );
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        /**
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         * Creates a buffer used in data transfer between format read and
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         * its datasource.
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         *
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         * @since    Series 60 3.2 
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         * @param    aSize              Suggested buffer size
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         * @param    aIsOwnBuffer       Indicates ownership of the buffer
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         * @return   Created buffer
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         */
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        CMMFDataBuffer* CreateClipBufferL( TUint aSize, TBool& aIsOwnBuffer );
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    private:    // data
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        // Flag used to determine which buffer is currently used as a sink buffer
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        enum TCurrentBuffer
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            {
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            EBufferOne = 0,
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            EBufferTwo,
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            EBufferNone
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            };
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        // Data source providing RTP data
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        MDataSource* iRtpDataSource;
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        TFourCC iFourCC;
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        TMediaId iMediaId;
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		TBool iFillRequested;
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		TBool iBufferToReadExists;
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        // Format decoding state machine
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        CFormatDecodeStateMachine* iStateMachine;
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        // Buffer one to store data 
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        CMMFDataBuffer* iFrameBufferOne;
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        // Buffer two to store data 
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        CMMFDataBuffer* iFrameBufferTwo;
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        // Current buffer in use
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        CMMFDataBuffer* iCurrentBuffer;
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        // Buffer to hold payload got from RtpSourceSink
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        CMMFDataBuffer* iPayloadBuffer;
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        // Indicates whether payload read has ownership of source buffer
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        TBool iSourceBufOwnership;
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		// Parameters relating to RTP data decoding
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        TMccCodecInfo iCInfo;
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        // MMF AsyncEventHandler
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        MAsyncEventHandler* iEventHandler;
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        TInt iPacketCount;
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        TInt iDroppedPacketCount;
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   private:    // Friend classes
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   #ifdef EUNIT_TEST
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        friend class UT_CAnyPayloadFormatRead;
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   #endif
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    };
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#endif