LCOV - code coverage report
Current view: top level - libavformat - iv8.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 49 54 90.7 %
Date: 2017-12-12 11:08:38 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2009 Michael Niedermayer
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include "avformat.h"
      22             : #include "internal.h"
      23             : 
      24             : 
      25        6130 : static int probe(AVProbeData *p)
      26             : {
      27             :     // the single file I have starts with that, I do not know if others do, too
      28        6130 :     if(   p->buf[0] == 1
      29          21 :        && p->buf[1] == 1
      30           4 :        && p->buf[2] == 3
      31           1 :        && p->buf[3] == 0xB8
      32           1 :        && p->buf[4] == 0x80
      33           1 :        && p->buf[5] == 0x60
      34             :       )
      35           1 :         return AVPROBE_SCORE_MAX-2;
      36             : 
      37        6129 :     return 0;
      38             : }
      39             : 
      40           1 : static int read_header(AVFormatContext *s)
      41             : {
      42             :     AVStream *st;
      43             : 
      44           1 :     st = avformat_new_stream(s, NULL);
      45           1 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47             : 
      48           1 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
      49           1 :     st->codecpar->codec_id = AV_CODEC_ID_MPEG4;
      50           1 :     st->need_parsing = AVSTREAM_PARSE_FULL;
      51           1 :     avpriv_set_pts_info(st, 64, 1, 90000);
      52             : 
      53           1 :     return 0;
      54             : 
      55             : }
      56             : 
      57          27 : static int read_packet(AVFormatContext *s, AVPacket *pkt)
      58             : {
      59             :     int ret, size, pts, type, flags;
      60          27 :     int first_pkt      = 0;
      61          27 :     int frame_complete = 0;
      62             : 
      63         596 :     while (!frame_complete) {
      64             : 
      65         545 :         type  = avio_rb16(s->pb); // 257 or 258
      66         545 :         size  = avio_rb16(s->pb);
      67         545 :         flags = avio_rb16(s->pb); //some flags, 0x80 indicates end of frame
      68         545 :                 avio_rb16(s->pb); //packet number
      69         545 :         pts   = avio_rb32(s->pb);
      70         545 :                 avio_rb32(s->pb); //6A 13 E3 88
      71             : 
      72         545 :         frame_complete = flags & 0x80;
      73             : 
      74         545 :         size -= 12;
      75         545 :         if (size < 1)
      76           2 :             return -1;
      77             : 
      78         543 :         if (type == 258) {
      79           1 :             avio_skip(s->pb, size);
      80           1 :             frame_complete = 0;
      81           1 :             continue;
      82             :         }
      83             : 
      84         542 :         if (!first_pkt) {
      85          25 :             ret = av_get_packet(s->pb, pkt, size);
      86          25 :             if (ret < 0)
      87           0 :                 return ret;
      88          25 :             first_pkt = 1;
      89          25 :             pkt->pts  = pts;
      90          25 :             pkt->pos -= 16;
      91             :         } else {
      92         517 :             ret = av_append_packet(s->pb, pkt, size);
      93         517 :             if (ret < 0) {
      94           0 :                 av_log(s, AV_LOG_ERROR, "failed to grow packet\n");
      95           0 :                 av_packet_unref(pkt);
      96           0 :                 return ret;
      97             :             }
      98             :         }
      99         542 :         if (ret < size) {
     100           1 :             av_log(s, AV_LOG_ERROR, "Truncated packet! Read %d of %d bytes\n",
     101             :                    ret, size);
     102           1 :             pkt->flags |= AV_PKT_FLAG_CORRUPT;
     103           1 :             break;
     104             :         }
     105             :     }
     106          25 :     pkt->stream_index = 0;
     107             : 
     108          25 :     return 0;
     109             : }
     110             : 
     111             : AVInputFormat ff_iv8_demuxer = {
     112             :     .name           = "iv8",
     113             :     .long_name      = NULL_IF_CONFIG_SMALL("IndigoVision 8000 video"),
     114             :     .read_probe     = probe,
     115             :     .read_header    = read_header,
     116             :     .read_packet    = read_packet,
     117             :     .flags          = AVFMT_GENERIC_INDEX,
     118             : };

Generated by: LCOV version 1.13