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:  Definition of the S60 Audio Stream Source custom command msg cods.

    15 *

    16 */

    17 

    18 

    19 #ifndef CACHESOURCE_H

    20 #define CACHESOURCE_H

    21 

    22 #include <e32base.h>

    23 #include <DataSourceConfigIntfc.h>

    24 #include <MultimediaDataSource.h>

    25 

    26 // FORWARD DECLARATIONS

    27 class MDataSource;

    28 class CSinkQueueItem;

    29 class CReadWriteRequestAO;

    30 class CDataSourceConfigIntfc;

    31 class CMMFDataBuffer;

    32 // CLASS DECLARATION

    33 

    34 class CMDataSourceObserver : public MMultimediaDataSourceObserver

    35     {

    36     public:

    37       static CMDataSourceObserver* NewL(

    38             CMultimediaDataSource* aDataSource

    39             ,CMultimediaDataSource* aParent );

    40         

    41         virtual ~CMDataSourceObserver();

    42 

    43     private:

    44         CMDataSourceObserver(CMultimediaDataSource* aDataSource ,CMultimediaDataSource* aParent);

    45         void ConstructL();

    46         

    47         void BufferFilled( CMMFBuffer* aBuffer );

    48         

    49         // KStreamControlEventSeekingSupportChanged

    50         // KStreamControlEventRandomSeekingSupportChanged

    51         // KMultimediaDataSourceObserverEventSourceSizeChanged

    52         void Event( TUid aEvent );

    53         // Returns BITRATE. This is used for calculation how much of data need to be

    54         // buffered by the source before filling observer buffers.

    55         TInt GetBitRate( TUint& aBitRate );

    56         

    57         CMultimediaDataSource* iDataSource;

    58         CMultimediaDataSource* iParent;

    59     };

    60 

    61 

    62 class CCacheSource : public CMultimediaDataSource

    63                             //,public MCacheCopyEngineObserver

    64     {

    65     public:

    66         IMPORT_C static CCacheSource* NewL( CMultimediaDataSource* aDataSource, CDataSourceConfigIntfc* aDataSourceConfig );

    67         

    68         // From CMultimediaDataSource begins

    69         TInt SetObserver( MMultimediaDataSourceObserver& aObserver );

    70         TInt GetObserver( MMultimediaDataSourceObserver*& aObserver );

    71         void Event( TUid aEvent );

    72         TInt SetDataTypeCode(TFourCC aSourceFourCC );

    73         TInt GetDataTypeCode(TFourCC& aSourceFourCC );

    74         TInt GetSize( TUint& aSize );

    75         TInt Open();

    76         TInt Close();

    77         TInt Prime();

    78         TInt Play();

    79         TInt Stop();

    80         TInt FillBuffer( CMMFBuffer* aBuffer);

    81         

    82 

    83         // From MCustomInterface

    84         TAny* CustomInterface( TUid aInterfaceUid );

    85 

    86        /* Seeking Interface */

    87         // Returns true if byte position can be reset to zero.

    88         // Valid in all states

    89         TInt GetSeekingSupport( TBool& aSeekSupport );

    90         // Returns true if byte position can be set anywhere between zero and

    91         // GetSize().

    92         // Valid in all states

    93         TInt GetRandomSeekingSupport( TBool& aSeekSupport );

    94         // Moves read position pointer to byte location requested by the observer

    95         // between zero and GetSize(). If the size specified is out of range, this

    96         // function returns KErrArgument.

    97         TInt Seek( TUint aPosInBytes );

    98         // From CMultimediaDataSource ends

    99         

   100         TInt ServiceBufferFilled( CMMFBuffer* aBuffer );

   101         void ReadRequestComplete(CReadWriteRequestAO* aRequest,TRequestStatus& aStatus);

   102         ~CCacheSource();

   103     private:

   104  

   105         CCacheSource(CMultimediaDataSource* aDataSource, CDataSourceConfigIntfc* aDataSourceConfig);

   106         

   107         void ConstructL (void);

   108         

   109         TInt EmptySinkQueue();

   110         TInt AppendBufferToSinkQueue( CMMFBuffer* aBuffer );

   111         TInt ServiceFillBuffer();

   112         

   113     private: // Data

   114         

   115         // Queue of data buffers from client

   116         TSglQue<CSinkQueueItem>* iSinkQueue;

   117         // Reference to MMultimedia data source

   118         MMultimediaDataSourceObserver* iObserver;

   119         

   120         CMDataSourceObserver* iDataSourceObserver;

   121         // Parent DataSource to Talk to

   122         CMultimediaDataSource* iDataSource;

   123         // Sink item Counter

   124         TInt iSnkItemsCount;

   125         //Temp File to Store Data

   126         RFile iFile;

   127         //Session to File server.

   128         RFs iFs;

   129         //File Name and Path for the Temp file

   130         TFileName iFileName;

   131         //Last Buffer Flag

   132         TBool iLastBufferWritten;

   133         //Size of the Temp File

   134         TInt iFileSize;

   135         // Number of bytes copied to controller so far

   136         TUint iSnkBytes;

   137 

   138         CMMFDataBuffer* iTransferBuffer;

   139         

   140         CDataSourceConfigIntfc* iDataSourceConfig;

   141         

   142         CReadWriteRequestAO* iReadRequest;

   143         CReadWriteRequestAO* iWriteRequest;

   144         

   145         CDataSourceConfigIntfc::TCacheType iCacheType;

   146         CMMFDataBuffer* iDataBuffer;

   147         HBufC*          iCacheLocation;

   148         TInt            iAbsBufferStart;

   149         TInt            iAbsBufferEnd;

   150         TInt            iBufferReadPos;

   151         TInt            iSeekStart;

   152         TInt            iSeekEnd;

   153         TInt            iAbsBufferReadPos;

   154 

   155     };

   156 

   157 #endif // CACHESOURCE_H

   158 

   159     //  End of File