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2ba45a60 DM |
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 | |
26 | static 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 | 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 | ||
54 | FF_RAWVIDEO_DEMUXER_CLASS(ingenient) | |
55 | ||
56 | AVInputFormat ff_ingenient_demuxer = { | |
57 | .name = "ingenient", | |
58 | .long_name = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"), | |
59 | .priv_data_size = sizeof(FFRawVideoDemuxerContext), | |
60 | .read_header = ff_raw_video_read_header, | |
61 | .read_packet = ingenient_read_packet, | |
62 | .flags = AVFMT_GENERIC_INDEX, | |
63 | .extensions = "cgi", // FIXME | |
64 | .raw_codec_id = AV_CODEC_ID_MJPEG, | |
65 | .priv_class = &ingenient_demuxer_class, | |
66 | }; |