/*
  * RAW Ingenient MJPEG demuxer
  * Copyright (c) 2005 Alex Beregszaszi
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "avformat.h"

 #include "rawdec.h"

 
 // http://www.artificis.hu/files/texts/ingenient.txt
 static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
 {
     int ret, size, w, h, unk1, unk2;
 

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

         return AVERROR(EIO); // FIXME
 

     size = avio_rl32(s->pb);

     w = avio_rl16(s->pb);
     h = avio_rl16(s->pb);

     avio_skip(s->pb, 8); // zero + size (padded?)
     avio_skip(s->pb, 2);

     unk1 = avio_rl16(s->pb);
     unk2 = avio_rl16(s->pb);

     avio_skip(s->pb, 22); // ASCII timestamp

 
     av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
         size, w, h, unk1, unk2);
 

     ret = av_get_packet(s->pb, pkt, size);
     if (ret < 0)

         return ret;

     pkt->stream_index = 0;

     return ret;
 }
 

 FF_RAWVIDEO_DEMUXER_CLASS(ingenient)
 

 AVInputFormat ff_ingenient_demuxer = {

     .name           = "ingenient",
     .long_name      = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
     .priv_data_size = sizeof(FFRawVideoDemuxerContext),
     .read_header    = ff_raw_video_read_header,
     .read_packet    = ingenient_read_packet,

     .flags          = AVFMT_GENERIC_INDEX,
     .extensions     = "cgi", // FIXME

     .raw_codec_id   = AV_CODEC_ID_MJPEG,

     .priv_class     = &ingenient_demuxer_class,

 };