FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/wma_common.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 12 19 63.2%
Branches: 10 22 45.5%

Line Branch Exec Source
1 /*
2 * common code shared by all WMA variants
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 #include "libavutil/attributes.h"
22
23 #include "wma_common.h"
24
25 /**
26 *@brief Get the samples per frame for this stream.
27 *@param sample_rate output sample_rate
28 *@param version wma version
29 *@param decode_flags codec compression features
30 *@return log2 of the number of output samples per frame
31 */
32 32 av_cold int ff_wma_get_frame_len_bits(int sample_rate, int version,
33 unsigned int decode_flags)
34 {
35 int frame_len_bits;
36
37
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32 if (sample_rate <= 16000)
38 3 frame_len_bits = 9;
39
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29 else if (sample_rate <= 22050 || (sample_rate <= 32000 && version == 1))
40 frame_len_bits = 10;
41
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29 else if (sample_rate <= 48000 || version < 3)
42 29 frame_len_bits = 11;
43 else if (sample_rate <= 96000)
44 frame_len_bits = 12;
45 else
46 frame_len_bits = 13;
47
48
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32 if (version == 3) {
49 16 int tmp = decode_flags & 0x6;
50
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16 if (tmp == 0x2)
51 ++frame_len_bits;
52
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16 else if (tmp == 0x4)
53 --frame_len_bits;
54
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16 else if (tmp == 0x6)
55 frame_len_bits -= 2;
56 }
57
58 32 return frame_len_bits;
59 }
60