Imported Debian version 2.4.3~trusty1
[deb_ffmpeg.git] / ffmpeg / libavcodec / unary.h
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 */