ts::AVCParser Class Reference

Parser for Advanced Video Coding data. More...

#include <tsAVCParser.h>

Public Member Functions
	AVCParser (const void *data, size_t size_in_bytes)
	Constructor.
bool	byteAligned () const
	Check if the current bit pointer is on a byte boundary.
bool	endOfStream () const
	Check end of stream.
template<typename INT > requires std::signed_integral<INT>
bool	i (INT &val, size_t n)
	Read the next signed integer using n bits and advance the bitstream pointer.
template<typename INT > requires std::integral<INT>
bool	nextBits (INT &val, size_t n)
	Provide the next n bits without advancing the bitstream pointer.
bool	rbspTrailingBits ()
	Skip an rbsp_trailing_bits() as defined by ISO/EIC 14496-10 7.3.2.11.
template<typename INT > requires std::integral<INT>
bool	readBits (INT &val, size_t n)
	Read the next n bits and advance the bitstream pointer.
size_t	remainingBits () const
	Get number of remaining bits.
size_t	remainingBytes () const
	Get number of remaining bytes (rounded down).
void	reset (const void *data, size_t size_in_bytes)
	Reset with a new memory area.
void	reset (size_t byte_offset=0, size_t bit_offset=0)
	Reset parsing at the specified point.
template<typename INT > requires std::signed_integral<INT>
bool	se (INT &val)
	Read the next Exp-Golomb-coded signed integer and advance the bitstream pointer.
template<typename INT > requires std::unsigned_integral<INT>
bool	u (INT &val, size_t n)
	Read the next unsigned integer using n bits and advance the bitstream pointer.
template<typename INT > requires std::unsigned_integral<INT>
bool	ue (INT &val)
	Read the next Exp-Golomb-coded unsigned integer and advance the bitstream pointer.

Detailed Description

Parser for Advanced Video Coding data.

Originally defined for AVC, it is now used in:

• AVC, Advanced Video Coding, ISO 14496-10, ITU-T Rec. H.264.
• HEVC, High Efficiency Video Coding, ITU-T Rec. H.265.
• VVC, Versatile Video Coding, ITU-T Rec. H.266.

The naming of methods such as readBits(), i(), u(), etc. is directly transposed from ISO/IEC 14496-10, ITU-T Rec. H.264.

Constructor & Destructor Documentation

AVCParser()

ts::AVCParser::AVCParser	(	const void *	data,
		size_t	size_in_bytes
	)

Constructor.

Parameters

[in]	data	Address of a memory area to parse. It must remain valid as long as the AVCParser object is used.
[in]	size_in_bytes	Size in bytes of the memory area to parse.

Member Function Documentation

reset() [1/2]

void ts::AVCParser::reset	(	const void *	data,
		size_t	size_in_bytes
	)

Reset with a new memory area.

Parameters

[in]	data	Address of a memory area to parse. It must remain valid as long as the AVCParser object is used.
[in]	size_in_bytes	Size in bytes of the memory area to parse.

reset() [2/2]

void ts::AVCParser::reset	(	size_t	byte_offset = 0,
		size_t	bit_offset = 0
	)

Reset parsing at the specified point.

Parameters

[in]	byte_offset	Offset of first byte to analyze.
[in]	bit_offset	Offset of first bit in first byte. The bit offset zero is the most significant bit.

remainingBytes()

size_t ts::AVCParser::remainingBytes

(

)

const

Get number of remaining bytes (rounded down).

This is the remaining bytes in the input raw binary data. The remaining number of bytes to read can be lower, especially in case of "start code emulation prevention".

Returns

The number of remaining bytes (rounded down).

remainingBits()

size_t ts::AVCParser::remainingBits

(

)

const

Get number of remaining bits.

This is the remaining bits in the input raw binary data. The remaining number of bits to read can be lower, especially in case of "start code emulation prevention".

Returns

The number of remaining bits.

endOfStream()

bool ts::AVCParser::endOfStream ( ) const

inline

Check end of stream.

Returns

True if at end of stream.

byteAligned()

bool ts::AVCParser::byteAligned ( ) const

inline

Check if the current bit pointer is on a byte boundary.

Returns

True if the current bit pointer is on a byte boundary.

rbspTrailingBits()

bool ts::AVCParser::rbspTrailingBits

(

)

Skip an rbsp_trailing_bits() as defined by ISO/EIC 14496-10 7.3.2.11.

Returns

True if one was found and skipped.

nextBits()

template<typename INT >
requires std::integral<INT>

bool ts::AVCParser::nextBits	(	INT &	val,
		size_t	n
	)

Provide the next n bits without advancing the bitstream pointer.

Template Parameters

INT	An integer type for the returned data.

Parameters

[out]	val	Returned integer value.
[in]	n	Number of bits to read.

Returns

True on success, false on error.

readBits()

template<typename INT >
requires std::integral<INT>

bool ts::AVCParser::readBits	(	INT &	val,
		size_t	n
	)

Read the next n bits and advance the bitstream pointer.

Template Parameters

INT	An integer type for the returned data.

Parameters

[out]	val	Returned integer value.
[in]	n	Number of bits to read.

Returns

True on success, false on error.

u()

template<typename INT >
requires std::unsigned_integral<INT>

bool ts::AVCParser::u ( INT &  val, size_t  n  )

inline

Read the next unsigned integer using n bits and advance the bitstream pointer.

Template Parameters

INT	An integer type for the returned data.

Parameters

[out]	val	Returned integer value.
[in]	n	Number of bits to read.

Returns

True on success, false on error.

i()

template<typename INT >
requires std::signed_integral<INT>

bool ts::AVCParser::i ( INT &  val, size_t  n  )

inline

Read the next signed integer using n bits and advance the bitstream pointer.

Template Parameters

INT	An integer type for the returned data.

Parameters

[out]	val	Returned integer value.
[in]	n	Number of bits to read.

Returns

True on success, false on error.

ue()

template<typename INT >
requires std::unsigned_integral<INT>

bool ts::AVCParser::ue ( INT &  val )

inline

Read the next Exp-Golomb-coded unsigned integer and advance the bitstream pointer.

Template Parameters

INT	An integer type for the returned data.

Parameters

[out]

val

Returned integer value.

Returns

True on success, false on error.

se()

template<typename INT >
requires std::signed_integral<INT>

bool ts::AVCParser::se

(

INT &

val

)

Read the next Exp-Golomb-coded signed integer and advance the bitstream pointer.

Template Parameters

INT	An integer type for the returned data.

Parameters

[out]

val

Returned integer value.

Returns

True on success, false on error.

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

• tsAVCParser.h