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
28typedef 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
40struct MpegEncContext;
41
42typedef struct ParseContext1{
43    ParseContext pc;
44/* XXX/FIXME PC1 vs. PC */
45    /* MPEG-2-specific */
46    AVRational frame_rate;
47    int progressive_sequence;
48    int width, height;
49
50    /* XXX: suppress that, needed by MPEG-4 */
51    struct MpegEncContext *enc;
52    int first_picture;
53} ParseContext1;
54
55#define END_NOT_FOUND (-100)
56
57int ff_combine_frame(ParseContext *pc, int next, const uint8_t **buf, int *buf_size);
58int ff_mpeg4video_split(AVCodecContext *avctx, const uint8_t *buf,
59                        int buf_size);
60void ff_parse_close(AVCodecParserContext *s);
61void ff_parse1_close(AVCodecParserContext *s);
62
63/**
64 * Fetches timestamps for a specific byte within the current access unit.
65 * @param off byte position within the access unit
66 * @param remove Found timestamps will be removed if set to 1, kept if set to 0.
67 */
68void ff_fetch_timestamp(AVCodecParserContext *s, int off, int remove);
69
70#endif /* AVCODEC_PARSER_H */
71