LCOV - code coverage report
Current view: top level - libavformat - oggparseskeleton.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 0 40 0.0 %
Date: 2017-12-15 11:05:35 Functions: 0 1 0.0 %

          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 "libavcodec/bytestream.h"
      22             : #include "avformat.h"
      23             : #include "internal.h"
      24             : #include "oggdec.h"
      25             : 
      26           0 : static int skeleton_header(AVFormatContext *s, int idx)
      27             : {
      28           0 :     struct ogg *ogg = s->priv_data;
      29           0 :     struct ogg_stream *os = ogg->streams + idx;
      30           0 :     AVStream *st = s->streams[idx];
      31           0 :     uint8_t *buf = os->buf + os->pstart;
      32             :     int version_major, version_minor;
      33             :     int64_t start_num, start_den;
      34             :     uint64_t start_granule;
      35             :     int target_idx, start_time;
      36             : 
      37           0 :     st->codecpar->codec_type = AVMEDIA_TYPE_DATA;
      38             : 
      39           0 :     if ((os->flags & OGG_FLAG_EOS) && os->psize == 0)
      40           0 :         return 1;
      41             : 
      42           0 :     if (os->psize < 8)
      43           0 :         return -1;
      44             : 
      45           0 :     if (!strncmp(buf, "fishead", 8)) {
      46           0 :         if (os->psize < 64)
      47           0 :             return -1;
      48             : 
      49           0 :         version_major = AV_RL16(buf+8);
      50           0 :         version_minor = AV_RL16(buf+10);
      51             : 
      52           0 :         if (version_major != 3 && version_major != 4) {
      53           0 :             av_log(s, AV_LOG_WARNING, "Unknown skeleton version %d.%d\n",
      54             :                    version_major, version_minor);
      55           0 :             return -1;
      56             :         }
      57             : 
      58             :         // This is the overall start time. We use it for the start time of
      59             :         // of the skeleton stream since if left unset lavf assumes 0,
      60             :         // which we don't want since skeleton is timeless
      61             :         // FIXME: the real meaning of this field is "start playback at
      62             :         // this time which can be in the middle of a packet
      63           0 :         start_num = AV_RL64(buf+12);
      64           0 :         start_den = AV_RL64(buf+20);
      65             : 
      66           0 :         if (start_den > 0 && start_num > 0) {
      67             :             int base_den;
      68           0 :             av_reduce(&start_time, &base_den, start_num, start_den, INT_MAX);
      69           0 :             avpriv_set_pts_info(st, 64, 1, base_den);
      70           0 :             os->lastpts =
      71           0 :             st->start_time = start_time;
      72             :         }
      73           0 :     } else if (!strncmp(buf, "fisbone", 8)) {
      74           0 :         if (os->psize < 52)
      75           0 :             return -1;
      76             : 
      77           0 :         target_idx = ogg_find_stream(ogg, AV_RL32(buf+12));
      78           0 :         start_granule = AV_RL64(buf+36);
      79           0 :         if (target_idx < 0) {
      80           0 :             av_log(s, AV_LOG_WARNING, "Serial number in fisbone doesn't match any stream\n");
      81           0 :             return 1;
      82             :         }
      83           0 :         os = ogg->streams + target_idx;
      84           0 :         if (os->start_granule != OGG_NOGRANULE_VALUE) {
      85           0 :             av_log(s, AV_LOG_WARNING, "Multiple fisbone for the same stream\n");
      86           0 :             return 1;
      87             :         }
      88           0 :         if (start_granule != OGG_NOGRANULE_VALUE) {
      89           0 :             os->start_granule = start_granule;
      90             :         }
      91             :     }
      92             : 
      93           0 :     return 1;
      94             : }
      95             : 
      96             : const struct ogg_codec ff_skeleton_codec = {
      97             :     .magic = "fishead",
      98             :     .magicsize = 8,
      99             :     .header = skeleton_header,
     100             :     .nb_header = 0,
     101             : };

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