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ingenientdec.c
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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 
25 // http://www.artificis.hu/files/texts/ingenient.txt
27 {
28  int ret, size, w, h, unk1, unk2;
29 
30  if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
31  return AVERROR(EIO); // FIXME
32 
33  size = avio_rl32(s->pb);
34 
35  w = avio_rl16(s->pb);
36  h = avio_rl16(s->pb);
37 
38  avio_skip(s->pb, 8); // zero + size (padded?)
39  avio_skip(s->pb, 2);
40  unk1 = avio_rl16(s->pb);
41  unk2 = avio_rl16(s->pb);
42  avio_skip(s->pb, 22); // ASCII timestamp
43 
44  av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
45  size, w, h, unk1, unk2);
46 
47  ret = av_get_packet(s->pb, pkt, size);
48  if (ret < 0)
49  return ret;
50  pkt->stream_index = 0;
51  return ret;
52 }
53 
55 
57  .name = "ingenient",
58  .long_name = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
59  .priv_data_size = sizeof(FFRawVideoDemuxerContext),
63  .extensions = "cgi", // FIXME
64  .raw_codec_id = AV_CODEC_ID_MJPEG,
65  .priv_class = &ingenient_demuxer_class,
66 };