LCOV - code coverage report
Current view: top level - libavformat - subviewer1dec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 43 48 89.6 %
Date: 2017-12-12 11:08:38 Functions: 4 5 80.0 %

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2012 Clément Bœsch
       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             : /**
      22             :  * @file
      23             :  * SubViewer v1 subtitle demuxer
      24             :  */
      25             : 
      26             : #include "avformat.h"
      27             : #include "internal.h"
      28             : #include "subtitles.h"
      29             : 
      30             : typedef struct {
      31             :     FFDemuxSubtitlesQueue q;
      32             : } SubViewer1Context;
      33             : 
      34        6130 : static int subviewer1_probe(AVProbeData *p)
      35             : {
      36        6130 :     const unsigned char *ptr = p->buf;
      37             : 
      38        6130 :     if (strstr(ptr, "******** START SCRIPT ********"))
      39           1 :         return AVPROBE_SCORE_EXTENSION;
      40        6129 :     return 0;
      41             : }
      42             : 
      43           1 : static int subviewer1_read_header(AVFormatContext *s)
      44             : {
      45           1 :     int delay = 0;
      46           1 :     AVPacket *sub = NULL;
      47           1 :     SubViewer1Context *subviewer1 = s->priv_data;
      48           1 :     AVStream *st = avformat_new_stream(s, NULL);
      49             : 
      50           1 :     if (!st)
      51           0 :         return AVERROR(ENOMEM);
      52           1 :     avpriv_set_pts_info(st, 64, 1, 1);
      53           1 :     st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
      54           1 :     st->codecpar->codec_id   = AV_CODEC_ID_SUBVIEWER1;
      55             : 
      56          31 :     while (!avio_feof(s->pb)) {
      57             :         char line[4096];
      58          30 :         int len = ff_get_line(s->pb, line, sizeof(line));
      59             :         int hh, mm, ss;
      60             : 
      61          30 :         if (!len)
      62           1 :             break;
      63             : 
      64          29 :         if (!strncmp(line, "[DELAY]", 7)) {
      65           1 :             ff_get_line(s->pb, line, sizeof(line));
      66           1 :             sscanf(line, "%d", &delay);
      67             :         }
      68             : 
      69          29 :         if (sscanf(line, "[%d:%d:%d]", &hh, &mm, &ss) == 3) {
      70          16 :             const int64_t pos = avio_tell(s->pb);
      71          16 :             int64_t pts_start = hh*3600LL + mm*60LL + ss + delay;
      72             : 
      73          16 :             len = ff_get_line(s->pb, line, sizeof(line));
      74          16 :             line[strcspn(line, "\r\n")] = 0;
      75          16 :             if (!*line) {
      76           6 :                 if (sub)
      77           6 :                     sub->duration = pts_start - sub->pts;
      78             :             } else {
      79          10 :                 sub = ff_subtitles_queue_insert(&subviewer1->q, line, len, 0);
      80          10 :                 if (!sub)
      81           0 :                     return AVERROR(ENOMEM);
      82          10 :                 sub->pos = pos;
      83          10 :                 sub->pts = pts_start;
      84          10 :                 sub->duration = -1;
      85             :             }
      86             :         }
      87             :     }
      88             : 
      89           1 :     ff_subtitles_queue_finalize(s, &subviewer1->q);
      90           1 :     return 0;
      91             : }
      92             : 
      93          11 : static int subviewer1_read_packet(AVFormatContext *s, AVPacket *pkt)
      94             : {
      95          11 :     SubViewer1Context *subviewer1 = s->priv_data;
      96          11 :     return ff_subtitles_queue_read_packet(&subviewer1->q, pkt);
      97             : }
      98             : 
      99           0 : static int subviewer1_read_seek(AVFormatContext *s, int stream_index,
     100             :                                int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
     101             : {
     102           0 :     SubViewer1Context *subviewer1 = s->priv_data;
     103           0 :     return ff_subtitles_queue_seek(&subviewer1->q, s, stream_index,
     104             :                                    min_ts, ts, max_ts, flags);
     105             : }
     106             : 
     107           1 : static int subviewer1_read_close(AVFormatContext *s)
     108             : {
     109           1 :     SubViewer1Context *subviewer1 = s->priv_data;
     110           1 :     ff_subtitles_queue_clean(&subviewer1->q);
     111           1 :     return 0;
     112             : }
     113             : 
     114             : AVInputFormat ff_subviewer1_demuxer = {
     115             :     .name           = "subviewer1",
     116             :     .long_name      = NULL_IF_CONFIG_SMALL("SubViewer v1 subtitle format"),
     117             :     .priv_data_size = sizeof(SubViewer1Context),
     118             :     .read_probe     = subviewer1_probe,
     119             :     .read_header    = subviewer1_read_header,
     120             :     .read_packet    = subviewer1_read_packet,
     121             :     .read_seek2     = subviewer1_read_seek,
     122             :     .read_close     = subviewer1_read_close,
     123             :     .extensions     = "sub",
     124             : };

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