GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/unary.h Lines: 7 7 100.0 %
Date: 2020-09-25 23:16:12 Branches: 4 4 100.0 %

Line Branch Exec Source
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 0 based code index. This is also the length in bits of the
32
 * code excluding the stop bit.
33
 * (in case len=1)
34
 * 1            0
35
 * 0            1
36
 * (in case len=2)
37
 * 1            0
38
 * 01           1
39
 * 00           2
40
 * (in case len=3)
41
 * 1            0
42
 * 01           1
43
 * 001          2
44
 * 000          3
45
 */
46
85112288
static inline int get_unary(GetBitContext *gb, int stop, int len)
47
{
48
    int i;
49
50

174445032
    for(i = 0; i < len && get_bits1(gb) != stop; i++);
51
85112288
    return i;
52
}
53
54
/**
55
 * Get unary code terminated by a 0 with a maximum length of 33
56
 * @param gb GetBitContext
57
 * @return Unary length/index
58
 */
59
51335183
static inline int get_unary_0_33(GetBitContext *gb)
60
{
61
51335183
    return get_unary(gb, 0, 33);
62
}
63
64
16507234
static inline int get_unary_0_9(GetBitContext *gb)
65
{
66
16507234
    return get_unary(gb, 0, 9);
67
}
68
69
#endif /* AVCODEC_UNARY_H */