QtsCrc32 Class Reference

Cyclic Redundancy Check as used in MPEG sections. More...

Public Types
enum	Validation {   Ignore,   Check,   Compute }
	What to do with a CRC32 in a section. More...

Public Member Functions
	QtsCrc32 ()
	Default constructor. More...
	QtsCrc32 (const QtsCrc32 &c)
	Copy constructor. More...
	QtsCrc32 (const void *data, size_t size)
	Constructor, compute the QtsCrc32 of a data area. More...
void	add (const void *data, int size)
	Continue the computation of a data area, following a previous CRC32. More...
	operator quint32 () const
	Convert to a 32-bit integer. More...
bool	operator!= (const QtsCrc32 &c) const
	Difference operator. More...
bool	operator!= (quint32 c) const
	Difference operator. More...
const QtsCrc32 &	operator= (const QtsCrc32 &c)
	Assigment operator. More...
bool	operator== (const QtsCrc32 &c) const
	Comparison operator. More...
bool	operator== (quint32 c) const
	Comparison operator. More...
quint32	value () const
	Get the value of a CRC32. More...

Private Attributes
quint32	_fcs
	Current computed value. More...

Detailed Description

Cyclic Redundancy Check as used in MPEG sections.

Original code, authors & copyright are unclear.

Member Enumeration Documentation

Validation

enum QtsCrc32::Validation

What to do with a CRC32 in a section.

Enumerator
Ignore	Ignore CRC32 value.
Check	Check CRC32 value to detect error.
Compute	Compute the new CRC32 value.

Constructor & Destructor Documentation

QtsCrc32() [1/3]

QtsCrc32::QtsCrc32 ( )

inline

Default constructor.

QtsCrc32() [2/3]

QtsCrc32::QtsCrc32 ( const QtsCrc32 &  c )

inline

Copy constructor.

Parameters

[in]

c

Other instance to copy.

QtsCrc32() [3/3]

QtsCrc32::QtsCrc32 ( const void *  data, size_t  size  )

inline

Constructor, compute the QtsCrc32 of a data area.

Parameters

[in]	data	Address of data area.
[in]	size	Size of data area.

Member Function Documentation

add()

void QtsCrc32::add	(	const void *	data,
		int	size
	)

Continue the computation of a data area, following a previous CRC32.

Parameters

[in]	data	Address of data area.
[in]	size	Size of data area.

value()

quint32 QtsCrc32::value ( ) const

inline

Get the value of a CRC32.

Returns

The 32-bit value of the CRC32.

operator quint32()

QtsCrc32::operator quint32 ( ) const

inline

Convert to a 32-bit integer.

Returns

The 32-bit value of the CRC32.

operator=()

const QtsCrc32& QtsCrc32::operator= ( const QtsCrc32 &  c )

inline

Assigment operator.

Parameters

[in]

c

Other instance to copy.

Returns

A reference to this object.

operator==() [1/2]

bool QtsCrc32::operator== ( const QtsCrc32 &  c ) const

inline

Comparison operator.

Parameters

[in]

c

Other instance to compare.

Returns

True if both CRC32 are identical.

operator!=() [1/2]

bool QtsCrc32::operator!= ( const QtsCrc32 &  c ) const

inline

Difference operator.

Parameters

[in]

c

Other instance to compare.

Returns

True if CRC32 are different.

operator==() [2/2]

bool QtsCrc32::operator== ( quint32  c ) const

inline

Comparison operator.

Parameters

[in]

c

An integer CRC32 to compare.

Returns

True if both CRC32 are identical.

operator!=() [2/2]

bool QtsCrc32::operator!= ( quint32  c ) const

inline

Difference operator.

Parameters

[in]

c

An integer CRC32 to compare.

Returns

True if CRC32 are different.

Member Data Documentation

_fcs

quint32 QtsCrc32::_fcs

private

Current computed value.

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The documentation for this class was generated from the following files:

• QtsCrc32.h
• QtsCrc32.cpp