h2645_parse.c File Reference

#include <string.h>
#include "config.h"
#include "libavutil/intmath.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mem.h"
#include "bytestream.h"
#include "h264.h"
#include "h2645_parse.h"
#include "vvc.h"
#include "hevc/hevc.h"

Go to the source code of this file.

Macros
#define	STARTCODE_TEST

Functions
int	ff_h2645_extract_rbsp (const uint8_t *src, int length, H2645RBSP *rbsp, H2645NAL *nal, int small_padding)
	Extract the raw (unescaped) bitstream. More...
static const char *	vvc_nal_unit_name (int nal_type)
static const char *	hevc_nal_unit_name (int nal_type)
static const char *	h264_nal_unit_name (int nal_type)
static int	get_bit_length (H2645NAL *nal, int min_size, int skip_trailing_zeros)
static int	vvc_parse_nal_header (H2645NAL *nal, void *logctx)
static int	hevc_parse_nal_header (H2645NAL *nal, void *logctx)
static int	h264_parse_nal_header (H2645NAL *nal, void *logctx)
static int	find_next_start_code (const uint8_t *buf, const uint8_t *next_avc)
static void	alloc_rbsp_buffer (H2645RBSP *rbsp, unsigned int size, int use_ref)
int	ff_h2645_packet_split (H2645Packet *pkt, const uint8_t *buf, int length, void *logctx, int nal_length_size, enum AVCodecID codec_id, int flags)
	Split an input packet into NAL units. More...
void	ff_h2645_packet_uninit (H2645Packet *pkt)
	Free all the allocated memory in the packet. More...

Variables
static const char *const	vvc_nal_type_name [32]
static const char *const	hevc_nal_type_name [64]
static const char *const	h264_nal_type_name [32]

Macro Definition Documentation

STARTCODE_TEST

#define STARTCODE_TEST

Value:

        if (i + 2 < length && src[i + 1] == 0 &&                        \
           (src[i + 2] == 3 || src[i + 2] == 1)) {                      \
            if (src[i + 2] == 1) {                                      \
                /* startcode, so we must be past the end */             \
                length = i;                                             \
            }                                                           \
            break;                                                      \
        }

Function Documentation

ff_h2645_extract_rbsp()

int ff_h2645_extract_rbsp	(	const uint8_t *	src,
		int	length,
		H2645RBSP *	rbsp,
		H2645NAL *	nal,
		int	small_padding
	)

Extract the raw (unescaped) bitstream.

Definition at line 36 of file h2645_parse.c.

Referenced by ff_h2645_packet_split(), generate_fake_vps(), and parse_nal_units().

vvc_nal_unit_name()

static const char* vvc_nal_unit_name ( int  nal_type )

static

Definition at line 186 of file h2645_parse.c.

Referenced by vvc_parse_nal_header().

hevc_nal_unit_name()

static const char* hevc_nal_unit_name ( int  nal_type )

static

Definition at line 259 of file h2645_parse.c.

Referenced by hevc_parse_nal_header().

h264_nal_unit_name()

static const char* h264_nal_unit_name ( int  nal_type )

static

Definition at line 300 of file h2645_parse.c.

Referenced by h264_parse_nal_header().

get_bit_length()

static int get_bit_length ( H2645NAL *  nal, int  min_size, int  skip_trailing_zeros  )

static

Definition at line 306 of file h2645_parse.c.

Referenced by ff_h2645_packet_split().

vvc_parse_nal_header()

static int vvc_parse_nal_header ( H2645NAL *  nal, void *  logctx  )

static

Returns

AVERROR_INVALIDDATA if the packet is not a valid NAL unit, 0 otherwise

Definition at line 340 of file h2645_parse.c.

Referenced by ff_h2645_packet_split().

hevc_parse_nal_header()

static int hevc_parse_nal_header ( H2645NAL *  nal, void *  logctx  )

static

Definition at line 365 of file h2645_parse.c.

Referenced by ff_h2645_packet_split().

h264_parse_nal_header()

static int h264_parse_nal_header ( H2645NAL *  nal, void *  logctx  )

static

Definition at line 386 of file h2645_parse.c.

Referenced by ff_h2645_packet_split().

find_next_start_code()

static int find_next_start_code ( const uint8_t *  buf, const uint8_t *  next_avc  )

static

Definition at line 403 of file h2645_parse.c.

Referenced by ff_h2645_packet_split().

alloc_rbsp_buffer()

static void alloc_rbsp_buffer ( H2645RBSP *  rbsp, unsigned int  size, int  use_ref  )

static

Definition at line 418 of file h2645_parse.c.

Referenced by ff_h2645_packet_split().

ff_h2645_packet_split()

int ff_h2645_packet_split	(	H2645Packet *	pkt,
		const uint8_t *	buf,
		int	length,
		void *	logctx,
		int	nal_length_size,
		enum AVCodecID	codec_id,
		int	flags
	)

Split an input packet into NAL units.

If data == raw_data holds true for a NAL unit of the returned pkt, then said NAL unit does not contain any emulation_prevention_three_byte and the data is contained in the input buffer pointed to by buf. Otherwise, the unescaped data is part of the rbsp_buffer described by the packet's H2645RBSP.

If the packet's rbsp_buffer_ref is not NULL, the underlying AVBuffer must own rbsp_buffer. If not and rbsp_buffer is not NULL, H2645_FLAG_USE_REF must not be set in flags. If H2645_FLAG_USE_REF is set in flags, rbsp_buffer will be reference-counted and owned by the underlying AVBuffer of rbsp_buffer_ref.

Definition at line 465 of file h2645_parse.c.

Referenced by cbs_h2645_split_fragment(), decode_extradata_ps(), decode_nal_units(), extract_extradata_h2645(), hevc_decode_nal_units(), and parse_nal_units().

ff_h2645_packet_uninit()

void ff_h2645_packet_uninit

(

H2645Packet *

pkt

)

Free all the allocated memory in the packet.

Definition at line 600 of file h2645_parse.c.

Referenced by cbs_h264_close(), cbs_h265_close(), cbs_h266_close(), decode_extradata_ps(), extract_extradata_close(), h264_decode_end(), hevc_decode_free(), hevc_decode_nal_units(), and hevc_parser_close().

Variable Documentation

vvc_nal_type_name

const char* const vvc_nal_type_name[32]

static

Definition at line 151 of file h2645_parse.c.

Referenced by vvc_nal_unit_name().

hevc_nal_type_name

const char* const hevc_nal_type_name[64]

static

Definition at line 192 of file h2645_parse.c.

Referenced by hevc_nal_unit_name().

h264_nal_type_name

const char* const h264_nal_type_name[32]

static

Definition at line 265 of file h2645_parse.c.

Referenced by h264_nal_unit_name().