mirror of
https://git.ffmpeg.org/ffmpeg.git
synced 2024-12-23 15:53:08 +00:00
68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*
|
|
* 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 */
|