FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/vp56rac.c
Date: 2021-09-16 08:47:15
Exec Total Coverage
Lines: 9 10 90.0%
Branches: 1 2 50.0%

Line Branch Exec Source
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 8209 int ff_vp56_init_range_decoder(VP56RangeCoder *c, const uint8_t *buf, int buf_size)
41 {
42 8209 c->high = 255;
43 8209 c->bits = -16;
44 8209 c->buffer = buf;
45 8209 c->end = buf + buf_size;
46 8209 c->end_reached = 0;
47
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8209 if (buf_size < 1)
48 return AVERROR_INVALIDDATA;
49 8209 c->code_word = bytestream_get_be24(&c->buffer);
50 8209 return 0;
51 }
52