FFmpeg
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
h261.h
Go to the documentation of this file.
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 {
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 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];
61 
63 void ff_h261_common_init(void);
64 
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);
71 
72 #endif /* AVCODEC_H261_H */
void ff_h261_reorder_mb_index(MpegEncContext *s)
Definition: h261enc.c:108
const char * s
Definition: avisynth_c.h:631
MpegEncContext s
Definition: h261.h:38
const uint8_t ff_h261_mba_bits[35]
Definition: h261data.c:48
int current_mv_x
Definition: h261.h:43
H261Context.
Definition: h261.h:37
int ff_h261_get_picture_format(int width, int height)
Definition: h261enc.c:40
int gob_number
Definition: h261.h:45
void ff_h261_common_init(void)
Definition: h261.c:83
mpegvideo header.
const uint8_t ff_h261_mba_code[35]
Definition: h261data.c:34
RLTable.
Definition: rl.h:38
const uint8_t ff_h261_cbp_tab[63][2]
Definition: h261data.c:95
uint8_t
int current_mv_y
Definition: h261.h:44
#define MAX_LEVEL
Definition: rl.h:35
void ff_h261_encode_picture_header(MpegEncContext *s, int picture_number)
Definition: h261enc.c:53
void ff_h261_loop_filter(MpegEncContext *s)
Definition: h261.c:63
int mtype
Definition: h261.h:42
rl header.
uint8_t ff_h261_rl_table_store[2][2 *MAX_RUN+MAX_LEVEL+3]
Definition: h261.c:33
#define width
int current_mba
Definition: h261.h:40
const uint8_t ff_h261_mtype_code[10]
Definition: h261data.c:63
const uint8_t ff_h261_mtype_bits[10]
Definition: h261data.c:69
const uint8_t ff_h261_mv_tab[17][2]
Definition: h261data.c:89
const int ff_h261_mtype_map[10]
Definition: h261data.c:75
void ff_h261_encode_mb(MpegEncContext *s, int16_t block[6][64], int motion_x, int motion_y)
Definition: h261enc.c:237
int mba_diff
Definition: h261.h:41
RLTable ff_h261_rl_tcoeff
Definition: h261data.c:150
int gob_start_code_skipped
Definition: h261.h:46
MpegEncContext.
Definition: mpegvideo.h:78
#define MAX_RUN
Definition: rl.h:34
#define height
void ff_h261_encode_init(MpegEncContext *s)
Definition: h261enc.c:365
static int16_t block[64]
Definition: dct-test.c:112