1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* NAL helper functions for muxers
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_NAL_H
#define AVFORMAT_NAL_H
#include <stdint.h>
#include "avio.h"
typedef struct NALU {
int offset;
uint32_t size;
} NALU;
typedef struct NALUList {
NALU *nalus;
unsigned nalus_array_size;
unsigned nb_nalus; ///< valid entries in nalus
} NALUList;
/* This function will parse the given annex B buffer and create
* a NALUList from it. This list can be passed to ff_nal_units_write_list()
* to write the access unit reformatted to mp4.
*
* @param list A NALUList. The list->nalus and list->nalus_array_size
* must be valid when calling this function and may be updated.
* nb_nalus is set by this function on success.
* @param buf buffer containing annex B H.264 or H.265. Must be padded.
* @param size size of buf, excluding padding.
* @return < 0 on error, the size of the mp4-style packet on success.
*/
int ff_nal_units_create_list(NALUList *list, const uint8_t *buf, int size);
/* Writes a NALUList to the specified AVIOContext. The list must originate
* from ff_nal_units_create_list() with the same buf. */
void ff_nal_units_write_list(const NALUList *list, AVIOContext *pb,
const uint8_t *buf);
const uint8_t *ff_nal_find_startcode(const uint8_t *p, const uint8_t *end);
const uint8_t *ff_nal_mp4_find_startcode(const uint8_t *start,
const uint8_t *end,
int nal_length_size);
int ff_nal_parse_units(AVIOContext *s, const uint8_t *buf, int size);
int ff_nal_parse_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size);
uint8_t *ff_nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len,
uint32_t *dst_len, int header_len);
#endif /* AVFORMAT_NAL_H */
|
