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83 lines
3.1 KiB
83 lines
3.1 KiB
/* |
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* AVC helper functions for muxers |
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* Copyright (c) 2008 Aurelien Jacobs <aurel@gnuage.org> |
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* |
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* This file is part of FFmpeg. |
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* |
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* FFmpeg is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public |
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* License as published by the Free Software Foundation; either |
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* version 2.1 of the License, or (at your option) any later version. |
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* |
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* FFmpeg is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
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* License along with FFmpeg; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef AVFORMAT_AVC_H |
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#define AVFORMAT_AVC_H |
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#include <stdint.h> |
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#include "libavutil/rational.h" |
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#include "avio.h" |
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typedef struct NALU { |
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int offset; |
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uint32_t size; |
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} NALU; |
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typedef struct NALUList { |
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NALU *nalus; |
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unsigned nalus_array_size; |
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unsigned nb_nalus; ///< valid entries in nalus |
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} NALUList; |
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/* This function will parse the given annex B buffer and create |
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* a NALUList from it. This list can be passed to ff_nal_units_write_list() |
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* to write the access unit reformatted to mp4. |
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* |
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* @param list A NALUList. The list->nalus and list->nalus_array_size |
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* must be valid when calling this function and may be updated. |
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* nb_nalus is set by this function on success. |
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* @param buf buffer containing annex B H.264 or H.265. Must be padded. |
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* @param size size of buf, excluding padding. |
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* @return < 0 on error, the size of the mp4-style packet on success. |
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*/ |
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int ff_nal_units_create_list(NALUList *list, const uint8_t *buf, int size); |
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/* Writes a NALUList to the specified AVIOContext. The list must originate |
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* from ff_nal_units_create_list() with the same buf. */ |
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void ff_nal_units_write_list(const NALUList *list, AVIOContext *pb, |
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const uint8_t *buf); |
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int ff_avc_parse_nal_units(AVIOContext *s, const uint8_t *buf, int size); |
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int ff_avc_parse_nal_units_buf(const uint8_t *buf_in, uint8_t **buf, int *size); |
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int ff_isom_write_avcc(AVIOContext *pb, const uint8_t *data, int len); |
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const uint8_t *ff_avc_find_startcode(const uint8_t *p, const uint8_t *end); |
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int ff_avc_write_annexb_extradata(const uint8_t *in, uint8_t **buf, int *size); |
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const uint8_t *ff_avc_mp4_find_startcode(const uint8_t *start, |
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const uint8_t *end, |
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int nal_length_size); |
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uint8_t *ff_nal_unit_extract_rbsp(const uint8_t *src, uint32_t src_len, |
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uint32_t *dst_len, int header_len); |
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typedef struct { |
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uint8_t id; |
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uint8_t profile_idc; |
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uint8_t level_idc; |
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uint8_t constraint_set_flags; |
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uint8_t chroma_format_idc; |
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uint8_t bit_depth_luma; |
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uint8_t bit_depth_chroma; |
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uint8_t frame_mbs_only_flag; |
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AVRational sar; |
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} H264SPS; |
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int ff_avc_decode_sps(H264SPS *sps, const uint8_t *buf, int buf_size); |
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#endif /* AVFORMAT_AVC_H */
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