FFmpeg
h261.h
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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 {
39 
41  int mba_diff;
42  int mtype;
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 const uint8_t ff_h261_mba_code[35];
52 extern const uint8_t ff_h261_mba_bits[35];
53 extern const uint8_t ff_h261_mtype_code[10];
54 extern const uint8_t ff_h261_mtype_bits[10];
55 extern const int ff_h261_mtype_map[10];
56 extern const uint8_t ff_h261_mv_tab[17][2];
57 extern const uint8_t ff_h261_cbp_tab[63][2];
59 
61 
64 void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64],
65  int motion_x, int motion_y);
66 void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number);
68 
69 #endif /* AVCODEC_H261_H */
H261Context::mtype
int mtype
Definition: h261.h:42
H261Context::gob_number
int gob_number
Definition: h261.h:45
H261Context::current_mv_y
int current_mv_y
Definition: h261.h:44
ff_h261_encode_init
void ff_h261_encode_init(MpegEncContext *s)
Definition: h261enc.c:372
mpegvideo.h
ff_h261_loop_filter
void ff_h261_loop_filter(MpegEncContext *s)
Definition: h261.c:61
ff_h261_mtype_map
const int ff_h261_mtype_map[10]
Definition: h261data.c:75
RLTable
RLTable.
Definition: rl.h:39
ff_h261_get_picture_format
int ff_h261_get_picture_format(int width, int height)
Definition: h261enc.c:40
width
#define width
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_h261_mba_code
const uint8_t ff_h261_mba_code[35]
Definition: h261data.c:34
ff_h261_mv_tab
const uint8_t ff_h261_mv_tab[17][2]
Definition: h261data.c:89
H261Context::s
MpegEncContext s
Definition: h261.h:38
height
#define height
H261Context
H261Context.
Definition: h261.h:37
ff_h261_cbp_tab
const uint8_t ff_h261_cbp_tab[63][2]
Definition: h261data.c:95
ff_h261_mtype_code
const uint8_t ff_h261_mtype_code[10]
Definition: h261data.c:63
ff_h261_encode_mb
void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: h261enc.c:237
ff_h261_rl_tcoeff
RLTable ff_h261_rl_tcoeff
Definition: h261data.c:150
ff_h261_mtype_bits
const uint8_t ff_h261_mtype_bits[10]
Definition: h261data.c:69
H261Context::gob_start_code_skipped
int gob_start_code_skipped
Definition: h261.h:46
rl.h
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
H261Context::current_mba
int current_mba
Definition: h261.h:40
H261Context::mba_diff
int mba_diff
Definition: h261.h:41
ff_h261_reorder_mb_index
void ff_h261_reorder_mb_index(MpegEncContext *s)
Definition: h261enc.c:108
ff_h261_mba_bits
const uint8_t ff_h261_mba_bits[35]
Definition: h261data.c:48
MpegEncContext
MpegEncContext.
Definition: mpegvideo.h:69
ff_h261_encode_picture_header
void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: h261enc.c:53
H261Context::current_mv_x
int current_mv_x
Definition: h261.h:43