FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/mods.c
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 3 41 7.3%
Functions: 1 3 33.3%
Branches: 1 12 8.3%

Line Branch Exec Source
1 /*
2 * MODS demuxer
3 * Copyright (c) 2015-2016 Florian Nouwt
4 * Copyright (c) 2017 Adib Surani
5 * Copyright (c) 2020 Paul B Mahol
6 *
7 * This file is part of FFmpeg.
8 *
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
13 *
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24 #include "libavutil/intreadwrite.h"
25
26 #include "avformat.h"
27 #include "internal.h"
28
29 6782 static int mods_probe(const AVProbeData *p)
30 {
31
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6782 if (memcmp(p->buf, "MODSN3\x0a\x00", 8))
32 6782 return 0;
33 if (AV_RB32(p->buf + 8) == 0)
34 return 0;
35 if (AV_RB32(p->buf + 12) == 0)
36 return 0;
37 if (AV_RB32(p->buf + 16) == 0)
38 return 0;
39 return AVPROBE_SCORE_MAX;
40 }
41
42 static int mods_read_header(AVFormatContext *s)
43 {
44 AVIOContext *pb = s->pb;
45 AVRational fps;
46 int64_t pos;
47
48 AVStream *st = avformat_new_stream(s, NULL);
49 if (!st)
50 return AVERROR(ENOMEM);
51
52 avio_skip(pb, 8);
53
54 st->nb_frames = avio_rl32(pb);
55 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
56 st->codecpar->codec_id = AV_CODEC_ID_MOBICLIP;
57 st->codecpar->width = avio_rl32(pb);
58 st->codecpar->height = avio_rl32(pb);
59
60 fps.num = avio_rl32(pb);
61 fps.den = 0x1000000;
62 avpriv_set_pts_info(st, 64, fps.den, fps.num);
63
64 avio_skip(pb, 16);
65
66 pos = avio_rl32(pb) + 4;
67 avio_seek(pb, pos, SEEK_SET);
68 pos = avio_rl32(pb);
69 avio_seek(pb, pos, SEEK_SET);
70
71 return 0;
72 }
73
74 static int mods_read_packet(AVFormatContext *s, AVPacket *pkt)
75 {
76 AVIOContext *pb = s->pb;
77 unsigned size;
78 int64_t pos;
79 int ret;
80
81 if (avio_feof(pb))
82 return AVERROR_EOF;
83
84 pos = avio_tell(pb);
85 size = avio_rl32(pb) >> 14;
86 ret = av_get_packet(pb, pkt, size);
87 pkt->pos = pos;
88 pkt->stream_index = 0;
89 pkt->flags |= AV_PKT_FLAG_KEY;
90
91 return ret;
92 }
93
94 const AVInputFormat ff_mods_demuxer = {
95 .name = "mods",
96 .long_name = NULL_IF_CONFIG_SMALL("MobiClip MODS"),
97 .read_probe = mods_probe,
98 .read_header = mods_read_header,
99 .read_packet = mods_read_packet,
100 .extensions = "mods",
101 .flags = AVFMT_GENERIC_INDEX,
102 };
103