1 /*

     2 * Copyright (c) 2006 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description:    

    15 *

    16 */

    17 

    18 

    19 

    20 #ifndef MCCVIDEOSOURCEKEYRETRIEVER_H

    21 #define MCCVIDEOSOURCEKEYRETRIEVER_H

    22 

    23 // INCLUDES

    24 #include <e32base.h>

    25 #include <mmf/server/mmfdatasink.h>

    26 #include "mmccevents.h"

    27 #include "mcccamerahandler.h"

    28 

    29 // FORWARD DECLARATIONS

    30 class CMccVideoSourceImpl;

    31 class CMccPeriodicRunner;

    32 

    33 // CONSTANTS

    34 const TInt KMccKeyRetrieveGuardTimeoutMicrosecs = 10000000; // 10 secs

    35 

    36 // CLASS DECLARATION

    37 

    38 /**

    39 * Class used to fecth encoder configuration information.

    40 * It wraps long taking asynchronous calls behind one sync function call.

    41 * Operation has guard timer if fetching takes too long.

    42 *

    43 */

    44 class CMccVideoSourceConfigKeyRetriever : 

    45     public CBase, public MDataSink, public MAsyncEventHandler

    46     {

    47 public:

    48 

    49     static CMccVideoSourceConfigKeyRetriever* NewLC( MMccCameraHandler& aCameraHandler );

    50     

    51     ~CMccVideoSourceConfigKeyRetriever();

    52     

    53     /**

    54     * Fetch config info. If operation takes too long, it is interrupted

    55     * and key retrieval fails

    56     */

    57     void RetrieveL( const TMccCodecInfo& aVideoCodec, TDes8& aConfigKey );

    58 

    59 public: // From MDataSink

    60 

    61     TFourCC SinkDataTypeCode( TMediaId aMediaId );   

    62      

    63     void EmptyBufferL( CMMFBuffer* aBuffer, MDataSource* aSupplier, TMediaId aMediaId );

    64     

    65     void BufferFilledL( CMMFBuffer* aBuffer );

    66     

    67     TBool CanCreateSinkBuffer(); 

    68     

    69     CMMFBuffer* CreateSinkBufferL( TMediaId aMediaId, TBool &aReference );

    70     

    71     void ConstructSinkL( const TDesC8& aInitData );

    72         

    73 public: // From MAsyncEventHandler

    74 

    75     TInt SendEventToClient( const TMMFEvent& aEvent );

    76 

    77 private:

    78 

    79     void ConstructL();

    80 

    81     CMccVideoSourceConfigKeyRetriever( MMccCameraHandler& aCameraHandler );

    82     

    83     void HandleEventL( TMccEvent& aEvent );

    84     

    85     void HandleError();

    86     

    87     void StopWaiting();

    88     

    89     void StartGuardTimer();

    90     

    91     void StopGuardTimer();

    92     

    93     static TInt GuardTimerExpired( TAny* aObject );

    94     

    95 private:

    96 

    97     MMccCameraHandler& iCameraHandler;   

    98     

    99     CActiveSchedulerWait* iWait;   

   100     

   101     CMccVideoSourceImpl* iSource;

   102     

   103     CMMFDataBuffer* iBuffer;

   104     

   105     TBool iFailed;

   106     

   107     CMccPeriodicRunner* iGuardTimer;

   108     

   109     TInt iGuardTimerTimeout;

   110 

   111     #ifdef TEST_EUNIT

   112 		friend class UT_CMccVideoSourceImpl;

   113 		friend class UT_CMccVideoSourceKeyRetriever;	

   114     #endif

   115    		      

   116     };

   117     

   118 

   119 #endif 

   120 

   121 

   122 // End of file

   123