FFmpeg: libavformat/ingenientdec.c Source File

FFmpeg

[フレーム]

libavformat

ingenientdec.c

Go to the documentation of this file.

1 /*

2 * RAW Ingenient MJPEG demuxer

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 */

22 #include "avformat.h"

23 #include "rawdec.h"

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;

30 if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G'))

31 return AVERROR(EIO); // FIXME

33 size = avio_rl32(s->pb);

35 w = avio_rl16(s->pb);

36 h = avio_rl16(s->pb);

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

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);

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 }

54 FF_RAWVIDEO_DEMUXER_CLASS(ingenient)

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 };

Generated on Wed Jul 10 2013 23:48:12 for FFmpeg by doxygen 1.8.2