blob: ef35547e9b65409b7ddad2e27c2a49add5d23f3b
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 | * @param fuzzy Only use found value if it is more informative than what we already have |
57 | */ |
58 | void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove, int fuzzy); |
59 | |
60 | #endif /* AVCODEC_PARSER_H */ |
61 |