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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
  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. };
  67.