LCOV - code coverage report
Current view: top level - libavformat - ingenientdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 3 23 13.0 %
Date: 2017-12-16 21:16:39 Functions: 1 2 50.0 %

          Line data    Source code
       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             : #include "libavutil/intreadwrite.h"
      25             : 
      26             : // http://multimedia.cx/ingenient.txt
      27        6130 : static int ingenient_probe(AVProbeData *p)
      28             : {
      29        6130 :     if (   AV_RN32(p->buf) != AV_RN32("MJPG")
      30           0 :         || p->buf_size < 50
      31           0 :         || AV_RB16(p->buf + 48) != 0xffd8)
      32        6130 :         return 0;
      33           0 :     return AVPROBE_SCORE_MAX * 3 / 4;
      34             : }
      35             : 
      36           0 : static int ingenient_read_packet(AVFormatContext *s, AVPacket *pkt)
      37             : {
      38             :     int ret, size, w, h, unk1, unk2;
      39             : 
      40           0 :     if (avio_rl32(s->pb) != MKTAG('M', 'J', 'P', 'G'))
      41           0 :         return AVERROR(EIO); // FIXME
      42             : 
      43           0 :     size = avio_rl32(s->pb);
      44             : 
      45           0 :     w = avio_rl16(s->pb);
      46           0 :     h = avio_rl16(s->pb);
      47             : 
      48           0 :     avio_skip(s->pb, 8); // zero + size (padded?)
      49           0 :     avio_skip(s->pb, 2);
      50           0 :     unk1 = avio_rl16(s->pb);
      51           0 :     unk2 = avio_rl16(s->pb);
      52           0 :     avio_skip(s->pb, 22); // ASCII timestamp
      53             : 
      54           0 :     av_log(s, AV_LOG_DEBUG, "Ingenient packet: size=%d, width=%d, height=%d, unk1=%d unk2=%d\n",
      55             :         size, w, h, unk1, unk2);
      56             : 
      57           0 :     ret = av_get_packet(s->pb, pkt, size);
      58           0 :     if (ret < 0)
      59           0 :         return ret;
      60           0 :     pkt->stream_index = 0;
      61           0 :     return ret;
      62             : }
      63             : 
      64             : FF_RAWVIDEO_DEMUXER_CLASS(ingenient)
      65             : 
      66             : AVInputFormat ff_ingenient_demuxer = {
      67             :     .name           = "ingenient",
      68             :     .long_name      = NULL_IF_CONFIG_SMALL("raw Ingenient MJPEG"),
      69             :     .priv_data_size = sizeof(FFRawVideoDemuxerContext),
      70             :     .read_probe     = ingenient_probe,
      71             :     .read_header    = ff_raw_video_read_header,
      72             :     .read_packet    = ingenient_read_packet,
      73             :     .flags          = AVFMT_GENERIC_INDEX,
      74             :     .extensions     = "cgi", // FIXME
      75             :     .raw_codec_id   = AV_CODEC_ID_MJPEG,
      76             :     .priv_class     = &ingenient_demuxer_class,
      77             : };

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