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1 | /* |
2 | * H261 decoder | |
3 | * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at> | |
4 | * Copyright (c) 2004 Maarten Daniels | |
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 | /** | |
24 | * @file | |
25 | * h261codec. | |
26 | */ | |
27 | ||
28 | #ifndef AVCODEC_H261_H | |
29 | #define AVCODEC_H261_H | |
30 | ||
31 | #include "mpegvideo.h" | |
32 | #include "rl.h" | |
33 | ||
34 | /** | |
35 | * H261Context | |
36 | */ | |
37 | typedef struct H261Context { | |
38 | MpegEncContext s; | |
39 | ||
40 | int current_mba; | |
41 | int mba_diff; | |
42 | int mtype; | |
43 | int current_mv_x; | |
44 | int current_mv_y; | |
45 | int gob_number; | |
46 | int gob_start_code_skipped; // 1 if gob start code is already read before gob header is read | |
47 | } H261Context; | |
48 | ||
49 | #define MB_TYPE_H261_FIL 0x800000 | |
50 | ||
51 | extern uint8_t ff_h261_rl_table_store[2][2 * MAX_RUN + MAX_LEVEL + 3]; | |
52 | ||
53 | extern const uint8_t ff_h261_mba_code[35]; | |
54 | extern const uint8_t ff_h261_mba_bits[35]; | |
55 | extern const uint8_t ff_h261_mtype_code[10]; | |
56 | extern const uint8_t ff_h261_mtype_bits[10]; | |
57 | extern const int ff_h261_mtype_map[10]; | |
58 | extern const uint8_t ff_h261_mv_tab[17][2]; | |
59 | extern const uint8_t ff_h261_cbp_tab[63][2]; | |
60 | extern RLTable ff_h261_rl_tcoeff; | |
61 | ||
62 | void ff_h261_loop_filter(MpegEncContext *s); | |
63 | void ff_h261_common_init(void); | |
64 | ||
65 | int ff_h261_get_picture_format(int width, int height); | |
66 | void ff_h261_reorder_mb_index(MpegEncContext *s); | |
67 | void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64], | |
68 | int motion_x, int motion_y); | |
69 | void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number); | |
70 | void ff_h261_encode_init(MpegEncContext *s); | |
71 | ||
72 | #endif /* AVCODEC_H261_H */ |