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1 | /* |
2 | * AVCodecParser prototypes and definitions | |
3 | * Copyright (c) 2003 Fabrice Bellard | |
4 | * Copyright (c) 2003 Michael Niedermayer | |
5 | * | |
6 | * This file is part of FFmpeg. | |
7 | * | |
8 | * FFmpeg is free software; you can redistribute it and/or | |
9 | * modify it under the terms of the GNU Lesser General Public | |
10 | * License as published by the Free Software Foundation; either | |
11 | * version 2.1 of the License, or (at your option) any later version. | |
12 | * | |
13 | * FFmpeg is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * Lesser General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public | |
19 | * License along with FFmpeg; if not, write to the Free Software | |
20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
21 | */ | |
22 | ||
23 | #ifndef AVCODEC_PARSER_H | |
24 | #define AVCODEC_PARSER_H | |
25 | ||
26 | #include "avcodec.h" | |
27 | ||
28 | typedef struct ParseContext{ | |
29 | uint8_t *buffer; | |
30 | int index; | |
31 | int last_index; | |
32 | unsigned int buffer_size; | |
33 | uint32_t state; ///< contains the last few bytes in MSB order | |
34 | int frame_start_found; | |
35 | int overread; ///< the number of bytes which where irreversibly read from the next frame | |
36 | int overread_index; ///< the index into ParseContext.buffer of the overread bytes | |
37 | uint64_t state64; ///< contains the last 8 bytes in MSB order | |
38 | } ParseContext; | |
39 | ||
40 | #define END_NOT_FOUND (-100) | |
41 | ||
42 | /** | |
43 | * Combine the (truncated) bitstream to a complete frame. | |
44 | * @return -1 if no complete frame could be created, | |
45 | * AVERROR(ENOMEM) if there was a memory allocation error | |
46 | */ | |
47 | int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size); | |
48 | int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf, | |
49 | int buf_size); | |
50 | void ff_parse_close(AVCodecParserContext *s); | |
51 | ||
52 | /** | |
53 | * Fetch timestamps for a specific byte within the current access unit. | |
54 | * @param off byte position within the access unit | |
55 | * @param remove Found timestamps will be removed if set to 1, kept if set to 0. | |
56 | */ | |
57 | void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove); | |
58 | ||
59 | #endif /* AVCODEC_PARSER_H */ |