1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 //

    15 

    16 #ifndef __MNGREADSTREAM_H__

    17 #define __MNGREADSTREAM_H__

    18 

    19 /** 	@file

    20 	@internalTechnology */

    21 

    22 #include <caf/content.h>

    23 

    24 #include "InputStream.h"

    25 

    26 class CMngFileReadStream : protected CBase, public MInputStream

    27 	{

    28 public:

    29 

    30 static CMngFileReadStream* NewL(ContentAccess::CData* aCafData);

    31 static CMngFileReadStream* NewL(const TDesC8& aData);

    32 

    33 	virtual TInt DataAvailable();

    34 	virtual void WaitForData(TInt aDataNeeded, TRequestStatus& aReq);

    35 

    36 	virtual void SeekL(TInt aPosition);

    37 	virtual TInt Tell();

    38 

    39 	virtual void Read(TDes8& aBuf, TRequestStatus& aReq, TInt32* aCrc=NULL);

    40 	virtual void ReadL(TDes8& aBuf, TInt32* aCrc=NULL);

    41 

    42 	virtual void ReadInt32L(TInt32& aNumber, TInt32* aCrc=NULL);

    43 	virtual void ReadUint16L(TUint16& aNumber, TInt32* aCrc=NULL);

    44 	virtual void ReadUint8L(TUint8& aNumber, TInt32* aCrc=NULL);

    45 

    46 	virtual void ReadInt32L(TInt32* aFirst, TInt aCount, TInt32* aCrc=NULL);

    47 	virtual void ReadUint16L(TUint16* aFirst,TInt aCount, TInt32* aCrc=NULL);

    48 	virtual void ReadUint8L(TUint8* aFirst, TInt aCount, TInt32* aCrc=NULL);

    49 	

    50 	virtual void Release();

    51 	virtual void AddRef();

    52 

    53 protected:

    54 	inline explicit CMngFileReadStream(ContentAccess::CData* aCafData=NULL);

    55 	~CMngFileReadStream();

    56 

    57 	void ConstructL(const TDesC8& aData);

    58 protected:

    59 	TPtrC8	iMemBuf;

    60 	TInt	iPosition;	// read position within the current buffer i.e. iMemBuf

    61 

    62 private:

    63 	void ConstructL();

    64 

    65 private:

    66 	HBufC8* iOwnedData;

    67 	ContentAccess::CData* iCafData;

    68 	TInt	iRefCount;

    69 	};

    70 

    71 inline 

    72 CMngFileReadStream::CMngFileReadStream(ContentAccess::CData* aCafData):

    73 															iCafData(aCafData),iRefCount(1)

    74 	{

    75 	}

    76 	

    77 	

    78 /**

    79 	Implementation of MInputStream interface for MNG player that

    80 	provides with adaptation over the ICL framework data reading 

    81 	interface

    82 */

    83 class CMngIclReadStream: public CMngFileReadStream 

    84 	{

    85 public:

    86 	static CMngIclReadStream* NewL(MDataFeed& aDataSupplier);

    87 

    88 	virtual void WaitForData(TInt aDataNeeded, TRequestStatus& aReq);

    89 	virtual void SeekL(TInt aPosition);

    90 	virtual TInt Tell();

    91 

    92 	void InvalidateBuffer();

    93 	void RestartL();

    94 	void Reset();

    95 

    96 protected:

    97 	inline explicit CMngIclReadStream(MDataFeed& aDataSupplier);

    98 

    99 private:

   100 	void ConstructL();

   101 

   102 private:

   103 	MDataFeed&	iDataSupplier;

   104 	TInt		iOverallPosition;	// offset of the data held in the iMemBuf within the image data

   105 	};

   106 

   107 inline 

   108 CMngIclReadStream::CMngIclReadStream(MDataFeed& aDataSupplier):

   109 													CMngFileReadStream(NULL),iDataSupplier(aDataSupplier)

   110 	{

   111 	}

   112 

   113 #endif // ndef __MNGREADSTREAM_H__