blob: 399a404b2b2fcaabd28b795f4452471e0082cc2b
1 | /* |
2 | * H.261 codec |
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 | * H.261 codec. |
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 */ |
73 |