FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavcodec/canopus.c
Date: 2021-09-24 20:55:06
Exec Total Coverage
Lines: 16 17 94.1%
Branches: 6 10 60.0%

Line Branch Exec Source
1 /*
2 * Canopus common routines
3 * Copyright (c) 2015 Vittorio Giovara <vittorio.giovara@gmail.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 <stdint.h>
23
24 #include "libavutil/rational.h"
25
26 #include "avcodec.h"
27 #include "bytestream.h"
28 #include "canopus.h"
29
30 56 int ff_canopus_parse_info_tag(AVCodecContext *avctx,
31 const uint8_t *src, size_t size)
32 {
33 GetByteContext gbc;
34 int par_x, par_y, field_order;
35
36 56 bytestream2_init(&gbc, src, size);
37
38 /* Parse aspect ratio. */
39 56 bytestream2_skip(&gbc, 8); // unknown, 16 bits 1
40 56 par_x = bytestream2_get_le32(&gbc);
41 56 par_y = bytestream2_get_le32(&gbc);
42
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56 if (par_x && par_y)
43 56 av_reduce(&avctx->sample_aspect_ratio.num,
44 &avctx->sample_aspect_ratio.den,
45 par_x, par_y, 255);
46
47 /* Short INFO tag (used in CLLC) has only AR data. */
48
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56 if (size == 0x18)
49 39 return 0;
50
51 17 bytestream2_skip(&gbc, 16); // unknown RDRT tag
52
53 /* Parse FIEL tag. */
54 17 bytestream2_skip(&gbc, 8); // 'FIEL' and 4 bytes 0
55 17 field_order = bytestream2_get_le32(&gbc);
56
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17 switch (field_order) {
57 2 case 0: avctx->field_order = AV_FIELD_TT; break;
58 case 1: avctx->field_order = AV_FIELD_BB; break;
59 15 case 2: avctx->field_order = AV_FIELD_PROGRESSIVE; break;
60 }
61
62 17 return 0;
63 }
64