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1 | /* |
2 | * copyright (c) 2004 Michael Niedermayer <michaelni@gmx.at> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef AVCODEC_UNARY_H | |
22 | #define AVCODEC_UNARY_H | |
23 | ||
24 | #include "get_bits.h" | |
25 | ||
26 | /** | |
27 | * Get unary code of limited length | |
28 | * @param gb GetBitContext | |
29 | * @param[in] stop The bitstop value (unary code of 1's or 0's) | |
30 | * @param[in] len Maximum length | |
31 | * @return Unary length/index | |
32 | */ | |
33 | static inline int get_unary(GetBitContext *gb, int stop, int len) | |
34 | { | |
35 | int i; | |
36 | ||
37 | for(i = 0; i < len && get_bits1(gb) != stop; i++); | |
38 | return i; | |
39 | } | |
40 | ||
41 | /** | |
42 | * Get unary code terminated by a 0 with a maximum length of 33 | |
43 | * @param gb GetBitContext | |
44 | * @return Unary length/index | |
45 | */ | |
46 | static inline int get_unary_0_33(GetBitContext *gb) | |
47 | { | |
48 | return get_unary(gb, 0, 33); | |
49 | } | |
50 | ||
51 | static inline int get_unary_0_9(GetBitContext *gb) | |
52 | { | |
53 | return get_unary(gb, 0, 9); | |
54 | } | |
55 | ||
56 | #endif /* AVCODEC_UNARY_H */ |