#include <stdbool.h>
#include <stdint.h>
#include <slice99.h>
#include <smolrtsp/priv/compiler_attrs.h>

Include dependency graph for h266.h:

Data Structures
struct	SmolRTSP_H266NalHeader
	An H.266 NAL header (RFC 9328 §1.1.4 / VVC spec §7.3.1.2). More...

struct	SmolRTSP_H266NalUnit
	An H.266 NAL unit. More...

Macros
#define	SMOLRTSP_H266_NAL_HEADER_SIZE sizeof(uint16_t)
	The size of an H.266 NAL header.

#define	SMOLRTSP_H266_FU_HEADER_SIZE (/* payload-hdr / sizeof(uint16_t) + / fu-header */ sizeof(uint8_t))
	The size of an H.266 fragmentation unit (FU) header.

#define	SMOLRTSP_H266_NAL_UNIT_TRAIL_NUT 0
	Coded slice of a non-STSA, non-RASL trailing picture (TRAIL).

#define	SMOLRTSP_H266_NAL_UNIT_STSA_NUT 1
	Coded slice of a temporal sub-layer access (STSA) picture.

#define	SMOLRTSP_H266_NAL_UNIT_RADL_NUT 2
	Coded slice of a random-access decodable leading (RADL) picture.

#define	SMOLRTSP_H266_NAL_UNIT_RASL_NUT 3
	Coded slice of a random-access skipped leading (RASL) picture.

#define	SMOLRTSP_H266_NAL_UNIT_IDR_W_RADL 7
	Coded slice of an IDR picture with associated RADL pictures.

#define	SMOLRTSP_H266_NAL_UNIT_IDR_N_LP 8
	Coded slice of an IDR picture with no leading pictures.

#define	SMOLRTSP_H266_NAL_UNIT_CRA_NUT 9
	Coded slice of a clean random-access (CRA) picture.

#define	SMOLRTSP_H266_NAL_UNIT_GDR_NUT 10
	Coded slice of a gradual decoding refresh (GDR) picture.

#define	SMOLRTSP_H266_NAL_UNIT_OPI_NUT 12
	Operating point information.

#define	SMOLRTSP_H266_NAL_UNIT_DCI_NUT 13
	Decoding capability information.

#define	SMOLRTSP_H266_NAL_UNIT_VPS_NUT 14
	Video parameter set.

#define	SMOLRTSP_H266_NAL_UNIT_SPS_NUT 15
	Sequence parameter set.

#define	SMOLRTSP_H266_NAL_UNIT_PPS_NUT 16
	Picture parameter set.

#define	SMOLRTSP_H266_NAL_UNIT_PREFIX_APS_NUT 17
	Prefix adaptation parameter set.

#define	SMOLRTSP_H266_NAL_UNIT_SUFFIX_APS_NUT 18
	Suffix adaptation parameter set.

#define	SMOLRTSP_H266_NAL_UNIT_PH_NUT 19
	Picture header.

#define	SMOLRTSP_H266_NAL_UNIT_AUD_NUT 20
	Access unit delimiter.

#define	SMOLRTSP_H266_NAL_UNIT_EOS_NUT 21
	End of sequence.

#define	SMOLRTSP_H266_NAL_UNIT_EOB_NUT 22
	End of bitstream.

#define	SMOLRTSP_H266_NAL_UNIT_PREFIX_SEI_NUT 23
	Prefix supplemental enhancement information.

#define	SMOLRTSP_H266_NAL_UNIT_SUFFIX_SEI_NUT 24
	Suffix supplemental enhancement information.

#define	SMOLRTSP_H266_NAL_UNIT_FD_NUT 25
	Filler data.

#define	SMOLRTSP_H266_NAL_UNIT_AP 28
	Aggregation Packet (RTP-only, RFC 9328 §4.3.2).

#define	SMOLRTSP_H266_NAL_UNIT_FU 29
	Fragmentation Unit (RTP-only, RFC 9328 §4.3.3).

Functions
SmolRTSP_H266NalHeader	SmolRTSP_H266NalHeader_parse (uint8_t bytes[restrict static 2]) SMOLRTSP_PRIV_MUST_USE
	Parses an H.266 NAL header from `bytes`.

uint16_t	SmolRTSP_H266NalHeader_serialize (SmolRTSP_H266NalHeader self) SMOLRTSP_PRIV_MUST_USE
	Converts `self` to a two-octet representation.

bool	SmolRTSP_H266NalHeader_is_vps (SmolRTSP_H266NalHeader self) SMOLRTSP_PRIV_MUST_USE
	Checks whether `self` is VPS.

bool	SmolRTSP_H266NalHeader_is_sps (SmolRTSP_H266NalHeader self) SMOLRTSP_PRIV_MUST_USE
	Checks whether `self` is SPS.

bool	SmolRTSP_H266NalHeader_is_pps (SmolRTSP_H266NalHeader self) SMOLRTSP_PRIV_MUST_USE
	Checks whether `self` is PPS.

bool	SmolRTSP_H266NalHeader_is_coded_slice_idr (SmolRTSP_H266NalHeader self) SMOLRTSP_PRIV_MUST_USE
	Checks whether `self` is a coded slice IDR (either IDR_W_RADL or IDR_N_LP).

bool	SmolRTSP_H266NalHeader_is_coded_slice_non_idr (SmolRTSP_H266NalHeader self) SMOLRTSP_PRIV_MUST_USE
	Checks whether `self` is a coded slice non-IDR (TRAIL_NUT, STSA_NUT, RADL_NUT, RASL_NUT, CRA_NUT, or GDR_NUT).

void	SmolRTSP_H266NalHeader_write_fu_header (SmolRTSP_H266NalHeader self, uint8_t buffer[restrict], bool is_first_fragment, bool is_last_fragment)
	Writes an FU payload header and FU header for `self` into `buffer`.

Detailed Description

H.266 / VVC NAL representation.

See also: H.266 spec: https://www.itu.int/rec/T-REC-H.266.; RTP payload format: https://datatracker.ietf.org/doc/html/rfc9328.

Macro Definition Documentation

◆ SMOLRTSP_H266_FU_HEADER_SIZE

#define SMOLRTSP_H266_FU_HEADER_SIZE (/* payload-hdr */ sizeof(uint16_t) + /* fu-header */ sizeof(uint8_t))

The size of an H.266 fragmentation unit (FU) header.

See also: https://datatracker.ietf.org/doc/html/rfc9328#section-4.3.3

◆ SMOLRTSP_H266_NAL_UNIT_AP

#define SMOLRTSP_H266_NAL_UNIT_AP 28

Aggregation Packet (RTP-only, RFC 9328 §4.3.2).

Carries two or more NAL units of one access unit in a single RTP packet.

◆ SMOLRTSP_H266_NAL_UNIT_FU

#define SMOLRTSP_H266_NAL_UNIT_FU 29

Fragmentation Unit (RTP-only, RFC 9328 §4.3.3).

Carries a fragment of a NAL unit that does not fit in one RTP packet.

Function Documentation

◆ SmolRTSP_H266NalHeader_write_fu_header()

void SmolRTSP_H266NalHeader_write_fu_header	(	SmolRTSP_H266NalHeader	self,
		uint8_t	buffer[restrict],
		bool	is_first_fragment,
		bool	is_last_fragment
	)

Writes an FU payload header and FU header for self into buffer.

Parameters

[in]	self	The header to write.
[out]	buffer	The memory area capable of storing SMOLRTSP_H266_FU_HEADER_SIZE bytes.
[in]	is_first_fragment	The indication of a start of the FU.
[in]	is_last_fragment	The indication of an end of the FU.

See also: https://datatracker.ietf.org/doc/html/rfc9328#section-4.3.3

Data Structures

Macros