1/*
2 * RAW Ingenient MJPEG demuxer
3 * Copyright (c) 2005 Alex Beregszaszi
4 *
5 * This file is part of Libav.
6 *
7 * Libav 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 * Libav 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 Libav; 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
26static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
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    if (av_new_packet(pkt, size) < 0)
48        return AVERROR(ENOMEM);
49
50    pkt->pos = avio_tell(s->pb);
51    pkt->stream_index = 0;
52    ret = avio_read(s->pb, pkt->data, size);
53    if (ret < 0) {
54        av_free_packet(pkt);
55        return ret;
56    }
57    pkt->size = ret;
58    return ret;
59}
60
61FF_RAWVIDEO_DEMUXER_CLASS(ingenient)
62
63AVInputFormat ff_ingenient_demuxer = {
64    .name           = "ingenient",
65    .long_name      = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
66    .priv_data_size = sizeof(FFRawVideoDemuxerContext),
67    .read_header    = ff_raw_video_read_header,
68    .read_packet    = ingenient_read_packet,
69    .flags= AVFMT_GENERIC_INDEX,
70    .extensions = "cgi", // FIXME
71    .value = CODEC_ID_MJPEG,
72    .priv_class     = &ingenient_demuxer_class,
73};
74