/* * 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 "libavutil/rational.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 */