FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/vp89_rac.h
Date: 2022-10-02 18:56:10
Exec Total Coverage
Lines: 12 12 100.0%
Branches: 4 4 100.0%

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1 /*
2 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
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 /**
22 * @file
23 * Range decoder functions common to VP8 and VP9
24 */
25
26 #ifndef AVCODEC_VP89_RAC_H
27 #define AVCODEC_VP89_RAC_H
28
29 #include <stdint.h>
30
31 #include "libavutil/attributes.h"
32
33 #include "vpx_rac.h"
34
35 // rounding is different than vpx_rac_get, is vpx_rac_get wrong?
36 10195028 static av_always_inline int vp89_rac_get(VPXRangeCoder *c)
37 {
38 10195028 return vpx_rac_get_prob(c, 128);
39 }
40
41 48223 static av_unused int vp89_rac_get_uint(VPXRangeCoder *c, int bits)
42 {
43 48223 int value = 0;
44
45
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292251 while (bits--) {
46 244028 value = (value << 1) | vp89_rac_get(c);
47 }
48
49 48223 return value;
50 }
51
52 // how probabilities are associated with decisions is different I think
53 // well, the new scheme fits in the old but this way has one fewer branches per decision
54 4234523 static av_always_inline int vp89_rac_get_tree(VPXRangeCoder *c, const int8_t (*tree)[2],
55 const uint8_t *probs)
56 {
57 4234523 int i = 0;
58
59 do {
60 9436950 i = tree[i][vpx_rac_get_prob(c, probs[i])];
61
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9436950 } while (i > 0);
62
63 4234523 return -i;
64 }
65
66 #endif /* AVCODEC_VP89_RAC_H */
67