FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/mpeg4audio_copy_pce.h
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 24 29 82.8%
Functions: 2 2 100.0%
Branches: 6 12 50.0%

Line Branch Exec Source
1 /*
2 * MPEG-4 Audio PCE copying function
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_MPEG4AUDIO_COPY_PCE_H
22 #define AVCODEC_MPEG4AUDIO_COPY_PCE_H
23
24 #include "libavutil/attributes.h"
25
26 #include "get_bits.h"
27 #include "put_bits.h"
28
29 216 static av_always_inline unsigned int ff_pce_copy_bits(PutBitContext *pb,
30 GetBitContext *gb,
31 int bits)
32 {
33 216 unsigned int el = get_bits(gb, bits);
34 216 put_bits(pb, bits, el);
35 216 return el;
36 }
37
38 18 static inline int ff_copy_pce_data(PutBitContext *pb, GetBitContext *gb)
39 {
40 int five_bit_ch, four_bit_ch, comment_size, bits;
41 18 int offset = put_bits_count(pb);
42
43 18 ff_pce_copy_bits(pb, gb, 10); // Tag, Object Type, Frequency
44 18 five_bit_ch = ff_pce_copy_bits(pb, gb, 4); // Front
45 18 five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Side
46 18 five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Back
47 18 four_bit_ch = ff_pce_copy_bits(pb, gb, 2); // LFE
48 18 four_bit_ch += ff_pce_copy_bits(pb, gb, 3); // Data
49 18 five_bit_ch += ff_pce_copy_bits(pb, gb, 4); // Coupling
50
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18 if (ff_pce_copy_bits(pb, gb, 1)) // Mono Mixdown
51 ff_pce_copy_bits(pb, gb, 4);
52
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18 if (ff_pce_copy_bits(pb, gb, 1)) // Stereo Mixdown
53 ff_pce_copy_bits(pb, gb, 4);
54
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18 if (ff_pce_copy_bits(pb, gb, 1)) // Matrix Mixdown
55 ff_pce_copy_bits(pb, gb, 3);
56
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18 for (bits = five_bit_ch*5+four_bit_ch*4; bits > 16; bits -= 16)
57 ff_pce_copy_bits(pb, gb, 16);
58
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18 if (bits)
59 18 ff_pce_copy_bits(pb, gb, bits);
60 18 align_put_bits(pb);
61 18 align_get_bits(gb);
62 18 comment_size = ff_pce_copy_bits(pb, gb, 8);
63
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18 for (; comment_size > 0; comment_size--)
64 ff_pce_copy_bits(pb, gb, 8);
65
66 18 return put_bits_count(pb) - offset;
67 }
68
69 #endif /* AVCODEC_MPEG4AUDIO_COPY_PCE_H */
70