FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/ingenientdec.c
Date: 2022-12-05 20:26:17
Exec Total Coverage
Lines: 3 23 13.0%
Functions: 1 2 50.0%
Branches: 1 10 10.0%

Line Branch Exec Source
1 /*
2 * RAW Ingenient MJPEG demuxer
3 * Copyright (c) 2005 Alex Beregszaszi
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 "avformat.h"
23 #include "rawdec.h"
24 #include "libavutil/intreadwrite.h"
25
26 // http://multimedia.cx/ingenient.txt
27 6782 static int ingenient_probe(const AVProbeData *p)
28 {
29
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6782 if ( AV_RN32(p->buf) != AV_RN32("MJPG")
30 || p->buf_size < 50
31 || AV_RB16(p->buf + 48) != 0xffd8)
32 6782 return 0;
33 return AVPROBE_SCORE_MAX * 3 / 4;
34 }
35
36 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
37 {
38 int ret, size, w, h, unk1, unk2;
39
40 if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
41 return AVERROR(EIO); // FIXME
42
43 size = avio_rl32(s->pb);
44
45 w = avio_rl16(s->pb);
46 h = avio_rl16(s->pb);
47
48 avio_skip(s->pb, 8); // zero + size (padded?)
49 avio_skip(s->pb, 2);
50 unk1 = avio_rl16(s->pb);
51 unk2 = avio_rl16(s->pb);
52 avio_skip(s->pb, 22); // ASCII timestamp
53
54 av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
55 size, w, h, unk1, unk2);
56
57 ret = av_get_packet(s->pb, pkt, size);
58 if (ret < 0)
59 return ret;
60 pkt->stream_index = 0;
61 return ret;
62 }
63
64 const AVInputFormat ff_ingenient_demuxer = {
65 .name = "ingenient",
66 .long_name = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
67 .priv_data_size = sizeof(FFRawVideoDemuxerContext),
68 .read_probe = ingenient_probe,
69 .read_header = ff_raw_video_read_header,
70 .read_packet = ingenient_read_packet,
71 .flags = AVFMT_GENERIC_INDEX,
72 .extensions = "cgi", // FIXME
73 .raw_codec_id = AV_CODEC_ID_MJPEG,
74 .priv_class = &ff_rawvideo_demuxer_class,
75 };
76