1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
|
/*
* MSMPEG4 decoder header
* copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org>
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVCODEC_MSMPEG4DEC_H
#define AVCODEC_MSMPEG4DEC_H
#include "avcodec.h"
#include "h263dec.h"
#include "mpegvideo.h"
#define INTER_INTRA_VLC_BITS 3
#define MB_NON_INTRA_VLC_BITS 9
typedef struct MSMP4DecContext {
H263DecContext h;
int bit_rate;
int flipflop_rounding;
int mv_table_index;
int rl_table_index;
int rl_chroma_table_index;
int dc_table_index;
int use_skip_mb_code;
int per_mb_rl_table;
int esc3_level_length;
int esc3_run_length;
} MSMP4DecContext;
static inline MSMP4DecContext *mpv_to_msmpeg4(H263DecContext *const h)
{
// Only legal because no MSMPEG-4 decoder uses slice-threading.
return (MSMP4DecContext*)h;
}
extern const VLCElem *ff_mb_non_intra_vlc[4];
extern VLCElem ff_inter_intra_vlc[8];
int ff_msmpeg4_decode_init(AVCodecContext *avctx);
int ff_msmpeg4_decode_ext_header(H263DecContext *const h, int buf_size);
void ff_msmpeg4_decode_motion(MSMP4DecContext *ms, int *mx_ptr, int *my_ptr);
int ff_msmpeg4_decode_block(MSMP4DecContext *ms, int16_t * block,
int n, int coded, const uint8_t *scan_table);
#endif
|
