// Copyright (c) 2002-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// which accompanies this distribution, and is available

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// include\mmf\common\mmfutilities.h

// 

//

#ifndef __MMF_COMMON_UTILITIES_H__

#define __MMF_COMMON_UTILITIES_H__

#include <e32base.h>

#include <mmf/server/mmfdatabuffer.h>

#include <mmf/common/mmffourcc.h>

/** 

@publishedAll

@released

Identifies the particular stream of the given media type.

*/

class TMediaId

	{

public:

	/**

	Constructs the class with the supplied arguments.

	This constructor is used when there are multiple streams of the same media type on the same

	MDataSource.

	@param  aMediaType

	        The media type (video, audio etc.).

	@param  aStreamId

	        Identifies a specific stream when there are multiple streams of the same media type on 

	        the same MDataSource.

	*/

	TMediaId(TUid aMediaType, TUint aStreamId);

	/**

    Constructs the class with the supplied argument.

	This constructor is used when there is a single stream of the same media type on the same

	MDataSource.

	@param  aMediaType

	        The media type (video, audio etc.).

	*/

	TMediaId(TUid aMediaType);

	/**

	Default constructor.

	*/

	TMediaId();

public:

	/**

	The media type (KUidMediaTypeAudio, KUidMediaTypeVideo, etc).

	*/

	TUid iMediaType;

	/**

	Identifies a particular media stream used in case where multiple streams

	of the same media type are present on the same MDataSource.

	*/

	TUint iStreamId;

private:

	/**

	This member is internal and not intended for use.

	*/

	TInt iReserved1;

	TInt iReserved2;

	TInt iReserved3;

	};

/**

@publishedAll

@released

The FourCC code that represents NULL.

*/

const TInt KFourCCNULL = KMMFFourCCCodeNULL;

/**

@publishedAll

@released

A class that holds a four character code, representing supported data encodings for the

conversion destination. The four character codes are packed into a single TUint32.

FourCC codes are a representation of the datatypes used to identify codecs. FourCC codes are used in 

codec .rss files as a match string used by ECOM to correctly load the required DLL.

*/

class TFourCC

{

public:

	/**

	Default constructor initialises the class to KMMFFourCCCodeNULL.

	*/

	TFourCC() {iFourCC = KMMFFourCCCodeNULL;} //'NULL'

	/**

	Packs the four arguments into a single TUint32.

	The four arguments are packed in little-endian format.

	@param  aChar1

	        A character that represents part of the FourCC code. This character will be the least 

	        significant byte of the code.

	@param  aChar2

            A character that represents part of the FourCC code.

	@param  aChar3

            A character that represents part of the FourCC code.

	@param  aChar4

	        A character that represents part of the FourCC code. This character will be the most 

	        significant byte of the code.

	*/

	TFourCC(TUint8 aChar1, TUint8 aChar2, TUint8 aChar3, TUint8 aChar4) {iFourCC =(aChar4<<24)+(aChar3<<16)+(aChar2<<8)+aChar1;}

	/**

	Constructs a FourCC code with the given 8 bit desciptor where the descriptor contains the

	characters that make up the FourCC code.

	@param  aDes

	        The descriptor containing the characters from which to make the FourCC code.

	*/

	TFourCC(const TDesC8& aDes) {iFourCC =(aDes[3]<<24)+(aDes[2]<<16)+(aDes[1]<<8)+aDes[0];}

	/**

    Constructor with a TInt32 in little-endian format.

	@param  aFourCC

            The FourCC code.

	*/

	TFourCC(TInt32 aFourCC) {iFourCC = aFourCC;}

	/**

    Returns the FourCC code in little-endian format.

	@return The FourCC code in little-endian format.

	*/

	TUint32 FourCC() {return iFourCC;}

	inline void FourCC( TPtr8* aDes ) const ;

	/**

    Sets the FourCC code equal to the value in the supplied argument.

	@param  aFourCC

	        The required TFourCC containting the FourCC code.

	*/

	void Set(TFourCC aFourCC) {iFourCC = aFourCC.iFourCC;}

	/**

    Sets the FourCC code equal to the supplied argument.

	@param  aFourCC

	        The required FourCC code.

	*/

	void Set(TUint32 aFourCC) {iFourCC = aFourCC;}

	/**

	Equality operator.

	@param  aA

	        The TFourCC code that *this will be tested against.

	@return A boolean indicating if the two values are equal. ETrue if the two values are equal, 

	        otherwise false.

	*/

	TBool operator==(const TFourCC& aA) const {return (iFourCC == aA.iFourCC);}

	/**

    Equality operator.

	@param  aUint

	        The FourCC code that *this will be tested against.

	@return A boolean indicating if the two values are equal. ETrue if the two values are equal, 

	        otherwise false.

	*/

	TBool operator==(const TUint32& aUint) const {return (iFourCC == aUint);}

	/**

    Inequality operator.

	@param  aA

	        The TFourCC code that *this will be tested against.

	@return A boolean indicating if the two values are not equal. ETrue if the two values are 

	        unequal, otherwise false.

	*/

	TBool operator!=(const TFourCC& aA) const {return (iFourCC != aA.iFourCC);}

	/**

    Inequality operator.

	@param  aUint

	        The FourCC code that *this will be tested against.

	*/

	TBool operator!=(const TUint32& aUint) const {return (iFourCC != aUint);}

private:

	TUint32 iFourCC;

};

#include <mmf/common/mmfutilities.inl>

#endif