Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * VP5/6/8 decoder | |
3 | * Copyright (c) 2010 Fiona Glaser <fiona@x264.com> | |
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 | #include "libavutil/common.h" | |
23 | #include "vp56.h" | |
24 | ||
25 | const uint8_t ff_vp56_norm_shift[256]= { | |
26 | 8,7,6,6,5,5,5,5,4,4,4,4,4,4,4,4, | |
27 | 3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3, | |
28 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | |
29 | 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, | |
30 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
31 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
32 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
33 | 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, | |
34 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
35 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
36 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
37 | 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, | |
38 | }; | |
39 | ||
40 | void ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size) | |
41 | { | |
42 | c->high = 255; | |
43 | c->bits = -16; | |
44 | c->buffer = buf; | |
45 | c->end = buf + buf_size; | |
46 | c->code_word = bytestream_get_be24(&c->buffer); | |
47 | } |