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/*
* AVC helper functions for muxers
* Copyright (c) 2008 Aurelien Jacobs <aurel@gnuage.org>
*
* 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_AVC_H
#define AVFORMAT_AVC_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);
int ff_avc_parse_nal_units(AVIOContext *s, const uint8_t *buf, int size);
int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size);
int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len);
const uint8_t *ff_avc_find_startcode(const uint8_t *p, const uint8_t *end);
int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size);
const uint8_t *ff_avc_mp4_find_startcode(const uint8_t *start,
const uint8_t *end,
int nal_length_size);
uint8_t *ff_nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len,
uint32_t *dst_len, int header_len);
typedef struct {
uint8_t id;
uint8_t profile_idc;
uint8_t level_idc;
uint8_t constraint_set_flags;
uint8_t chroma_format_idc;
uint8_t bit_depth_luma;
uint8_t bit_depth_chroma;
uint8_t frame_mbs_only_flag;
AVRational sar;
} H264SPS;
int ff_avc_decode_sps(H264SPS *sps, const uint8_t *buf, int buf_size);
#endif /* AVFORMAT_AVC_H */
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