LCOV - code coverage report
Current view: top level - libavformat - ivfdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 31 34 91.2 %
Date: 2017-12-10 21:22:29 Functions: 3 3 100.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2010 David Conrad
       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             : #include "riff.h"
      24             : #include "libavutil/intreadwrite.h"
      25             : 
      26        6130 : static int probe(AVProbeData *p)
      27             : {
      28        6130 :     if (AV_RL32(p->buf) == MKTAG('D','K','I','F')
      29          19 :         && !AV_RL16(p->buf+4) && AV_RL16(p->buf+6) == 32)
      30          19 :         return AVPROBE_SCORE_MAX-2;
      31             : 
      32        6111 :     return 0;
      33             : }
      34             : 
      35          19 : static int read_header(AVFormatContext *s)
      36             : {
      37             :     AVStream *st;
      38             :     AVRational time_base;
      39             : 
      40          19 :     avio_rl32(s->pb); // DKIF
      41          19 :     avio_rl16(s->pb); // version
      42          19 :     avio_rl16(s->pb); // header size
      43             : 
      44          19 :     st = avformat_new_stream(s, NULL);
      45          19 :     if (!st)
      46           0 :         return AVERROR(ENOMEM);
      47             : 
      48             : 
      49          19 :     st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
      50          19 :     st->codecpar->codec_tag  = avio_rl32(s->pb);
      51          19 :     st->codecpar->codec_id   = ff_codec_get_id(ff_codec_bmp_tags, st->codecpar->codec_tag);
      52          19 :     st->codecpar->width      = avio_rl16(s->pb);
      53          19 :     st->codecpar->height     = avio_rl16(s->pb);
      54          19 :     time_base.den         = avio_rl32(s->pb);
      55          19 :     time_base.num         = avio_rl32(s->pb);
      56          19 :     st->duration          = avio_rl64(s->pb);
      57             : 
      58          19 :     st->need_parsing      = AVSTREAM_PARSE_HEADERS;
      59             : 
      60          19 :     if (!time_base.den || !time_base.num) {
      61           0 :         av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
      62           0 :         return AVERROR_INVALIDDATA;
      63             :     }
      64             : 
      65          19 :     avpriv_set_pts_info(st, 64, time_base.num, time_base.den);
      66             : 
      67          19 :     return 0;
      68             : }
      69             : 
      70         883 : static int read_packet(AVFormatContext *s, AVPacket *pkt)
      71             : {
      72         883 :     int ret, size = avio_rl32(s->pb);
      73         883 :     int64_t   pts = avio_rl64(s->pb);
      74             : 
      75         883 :     ret = av_get_packet(s->pb, pkt, size);
      76         883 :     pkt->stream_index = 0;
      77         883 :     pkt->pts          = pts;
      78         883 :     pkt->pos         -= 12;
      79             : 
      80         883 :     return ret;
      81             : }
      82             : 
      83             : AVInputFormat ff_ivf_demuxer = {
      84             :     .name           = "ivf",
      85             :     .long_name      = NULL_IF_CONFIG_SMALL("On2 IVF"),
      86             :     .read_probe     = probe,
      87             :     .read_header    = read_header,
      88             :     .read_packet    = read_packet,
      89             :     .flags          = AVFMT_GENERIC_INDEX,
      90             :     .codec_tag      = (const AVCodecTag* const []){ ff_codec_bmp_tags, 0 },
      91             : };

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