TFourCC Class Reference

#include <mmf/common/mmfutilities.h>

class TFourCC

Public Member Functions
	TFourCC()
	TFourCC(TUint8, TUint8, TUint8, TUint8)
	TFourCC(const TDesC8 &)
	TFourCC(TInt32)
TUint32	FourCC()
void	FourCC(TPtr8 *)
void	Set(TFourCC)
void	Set(TUint32)
TBool	operator!=(const TFourCC &)
TBool	operator!=(const TUint32 &)
TBool	operator==(const TFourCC &)
TBool	operator==(const TUint32 &)

Detailed Description

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.

Constructor & Destructor Documentation

TFourCC ( )

TFourCC

(

)

[inline]

Default constructor initialises the class to KMMFFourCCCodeNULL.

TFourCC ( TUint8, TUint8, TUint8, TUint8 )

TFourCC	(	TUint8	aChar1,
		TUint8	aChar2,
		TUint8	aChar3,
		TUint8	aChar4
	)	[inline]

Packs the four arguments into a single TUint32.

The four arguments are packed in little-endian format.

significant byte of the code.

Parameters
aChar1	A character that represents part of the FourCC code. This character will be the least
aChar2	A character that represents part of the FourCC code.
aChar3	A character that represents part of the FourCC code.
aChar4	A character that represents part of the FourCC code. This character will be the most

TFourCC ( const TDesC8 & )

TFourCC

(

const TDesC8 &

aDes

)

[inline]

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

characters that make up the FourCC code.

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

TFourCC ( TInt32 )

TFourCC

(

TInt32

aFourCC

)

[inline]

Constructor with a TInt32 in little-endian format.

Parameters
aFourCC	The FourCC code.

Member Function Documentation

FourCC ( )

TUint32

FourCC

(

)

[inline]

Returns the FourCC code in little-endian format.

Return Value: The FourCC code in little-endian format.

FourCC ( TPtr8 * )

void

FourCC

(

TPtr8 *

aDes

)

const [inline]

Unpacks the FourCC code in little-endian format into the space provided by the argument.

The argument must be a pointer to a buffer of 4 bytes or greater.

Parameters
aDes	A buffer to hold the unpacked FourCC code.

Set ( TFourCC )

void

Set

(

TFourCC

aFourCC

)

[inline]

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

Parameters
aFourCC	The required TFourCC containting the FourCC code.

Set ( TUint32 )

void

Set

(

TUint32

aFourCC

)

[inline]

Sets the FourCC code equal to the supplied argument.

Parameters
aFourCC	The required FourCC code.

operator!= ( const TFourCC & )

TBool

operator!=

(

const TFourCC &

)

const [inline]

Inequality operator.

unequal, otherwise false.

Parameters
aA	The TFourCC code that *this will be tested against.

Return Value: A boolean indicating if the two values are not equal. ETrue if the two values are

operator!= ( const TUint32 & )

TBool

operator!=

(

const TUint32 &

aUint

)

const [inline]

Inequality operator.

Parameters
aUint	The FourCC code that *this will be tested against.

operator== ( const TFourCC & )

TBool

operator==

(

const TFourCC &

)

const [inline]

Equality operator.

otherwise false.

Parameters
aA	The TFourCC code that *this will be tested against.

Return Value: A boolean indicating if the two values are equal. ETrue if the two values are equal,

operator== ( const TUint32 & )

TBool

operator==

(

const TUint32 &

aUint

)

const [inline]

Equality operator.

otherwise false.

Parameters
aUint	The FourCC code that *this will be tested against.

Return Value: A boolean indicating if the two values are equal. ETrue if the two values are equal,