1 |
|
|
/* |
2 |
|
|
* MPEG-1/2 common code |
3 |
|
|
* Copyright (c) 2007 Aurelien Jacobs <aurel@gnuage.org> |
4 |
|
|
* |
5 |
|
|
* This file is part of FFmpeg. |
6 |
|
|
* |
7 |
|
|
* FFmpeg is free software; you can redistribute it and/or |
8 |
|
|
* modify it under the terms of the GNU Lesser General Public |
9 |
|
|
* License as published by the Free Software Foundation; either |
10 |
|
|
* version 2.1 of the License, or (at your option) any later version. |
11 |
|
|
* |
12 |
|
|
* FFmpeg is distributed in the hope that it will be useful, |
13 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
15 |
|
|
* Lesser General Public License for more details. |
16 |
|
|
* |
17 |
|
|
* You should have received a copy of the GNU Lesser General Public |
18 |
|
|
* License along with FFmpeg; if not, write to the Free Software |
19 |
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
20 |
|
|
*/ |
21 |
|
|
|
22 |
|
|
#ifndef AVCODEC_MPEG12_H |
23 |
|
|
#define AVCODEC_MPEG12_H |
24 |
|
|
|
25 |
|
|
#include "mpeg12vlc.h" |
26 |
|
|
#include "mpegvideo.h" |
27 |
|
|
|
28 |
|
|
extern uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3]; |
29 |
|
|
|
30 |
|
|
void ff_mpeg12_common_init(MpegEncContext *s); |
31 |
|
|
|
32 |
|
|
#define INIT_2D_VLC_RL(rl, static_size, flags)\ |
33 |
|
|
{\ |
34 |
|
|
static RL_VLC_ELEM rl_vlc_table[static_size];\ |
35 |
|
|
rl.rl_vlc[0] = rl_vlc_table;\ |
36 |
|
|
ff_init_2d_vlc_rl(&rl, static_size, flags);\ |
37 |
|
|
} |
38 |
|
|
|
39 |
|
|
void ff_init_2d_vlc_rl(RLTable *rl, unsigned static_size, int flags); |
40 |
|
|
|
41 |
|
1872252 |
static inline int decode_dc(GetBitContext *gb, int component) |
42 |
|
|
{ |
43 |
|
|
int code, diff; |
44 |
|
|
|
45 |
✓✓ |
1872252 |
if (component == 0) { |
46 |
|
1176424 |
code = get_vlc2(gb, ff_dc_lum_vlc.table, DC_VLC_BITS, 2); |
47 |
|
|
} else { |
48 |
|
695828 |
code = get_vlc2(gb, ff_dc_chroma_vlc.table, DC_VLC_BITS, 2); |
49 |
|
|
} |
50 |
✗✓ |
1872252 |
if (code < 0){ |
51 |
|
|
av_log(NULL, AV_LOG_ERROR, "invalid dc code at\n"); |
52 |
|
|
return 0xffff; |
53 |
|
|
} |
54 |
✓✓ |
1872252 |
if (code == 0) { |
55 |
|
247154 |
diff = 0; |
56 |
|
|
} else { |
57 |
|
1625098 |
diff = get_xbits(gb, code); |
58 |
|
|
} |
59 |
|
1872252 |
return diff; |
60 |
|
|
} |
61 |
|
|
|
62 |
|
|
int ff_mpeg1_decode_block_intra(GetBitContext *gb, |
63 |
|
|
const uint16_t *quant_matrix, |
64 |
|
|
uint8_t *const scantable, int last_dc[3], |
65 |
|
|
int16_t *block, int index, int qscale); |
66 |
|
|
|
67 |
|
|
void ff_mpeg1_clean_buffers(MpegEncContext *s); |
68 |
|
|
int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size, AVCodecParserContext *s); |
69 |
|
|
|
70 |
|
|
void ff_mpeg1_encode_picture_header(MpegEncContext *s, int picture_number); |
71 |
|
|
void ff_mpeg1_encode_mb(MpegEncContext *s, int16_t block[8][64], |
72 |
|
|
int motion_x, int motion_y); |
73 |
|
|
void ff_mpeg1_encode_init(MpegEncContext *s); |
74 |
|
|
void ff_mpeg1_encode_slice_header(MpegEncContext *s); |
75 |
|
|
|
76 |
|
|
void ff_mpeg12_find_best_frame_rate(AVRational frame_rate, |
77 |
|
|
int *code, int *ext_n, int *ext_d, |
78 |
|
|
int nonstandard); |
79 |
|
|
|
80 |
|
|
#endif /* AVCODEC_MPEG12_H */ |