LCOV - code coverage report
Current view: top level - libavformat - mpsubdec.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 53 60 88.3 %
Date: 2017-12-15 18:13:28 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             :  * MPlayer subtitles format demuxer
      24             :  */
      25             : 
      26             : #include "avformat.h"
      27             : #include "internal.h"
      28             : #include "subtitles.h"
      29             : 
      30             : typedef struct {
      31             :     FFDemuxSubtitlesQueue q;
      32             : } MPSubContext;
      33             : 
      34        6130 : static int mpsub_probe(AVProbeData *p)
      35             : {
      36        6130 :     const char *ptr     = p->buf;
      37        6130 :     const char *ptr_end = p->buf + p->buf_size;
      38             : 
      39       21248 :     while (ptr < ptr_end) {
      40             :         int inc;
      41             : 
      42       15046 :         if (!memcmp(ptr, "FORMAT=TIME", 11))
      43           1 :             return AVPROBE_SCORE_EXTENSION;
      44       15045 :         if (!memcmp(ptr, "FORMAT=", 7))
      45           2 :             return AVPROBE_SCORE_EXTENSION / 3;
      46       15043 :         inc = ff_subtitles_next_line(ptr);
      47       15043 :         if (!inc)
      48        6055 :             break;
      49        8988 :         ptr += inc;
      50             :     }
      51        6127 :     return 0;
      52             : }
      53             : 
      54           2 : static int mpsub_read_header(AVFormatContext *s)
      55             : {
      56           2 :     MPSubContext *mpsub = s->priv_data;
      57             :     AVStream *st;
      58             :     AVBPrint buf;
      59           2 :     AVRational pts_info = (AVRational){ 100, 1 }; // ts based by default
      60           2 :     int res = 0;
      61           2 :     int multiplier = 100;
      62           2 :     double current_pts = 0;
      63             : 
      64           2 :     av_bprint_init(&buf, 0, AV_BPRINT_SIZE_UNLIMITED);
      65             : 
      66           2 :     while (!avio_feof(s->pb)) {
      67             :         char line[1024];
      68             :         double start, duration;
      69          43 :         int fps, len = ff_get_line(s->pb, line, sizeof(line));
      70             : 
      71          43 :         if (!len)
      72           0 :             break;
      73             : 
      74          43 :         line[strcspn(line, "\r\n")] = 0;
      75             : 
      76          43 :         if (sscanf(line, "FORMAT=%d", &fps) == 1 && fps > 3 && fps < 100) {
      77             :             /* frame based timing */
      78           1 :             pts_info = (AVRational){ fps, 1 };
      79           1 :             multiplier = 1;
      80          42 :         } else if (sscanf(line, "%lf %lf", &start, &duration) == 2) {
      81             :             AVPacket *sub;
      82          23 :             const int64_t pos = avio_tell(s->pb);
      83             : 
      84          23 :             ff_subtitles_read_chunk(s->pb, &buf);
      85          23 :             if (buf.len) {
      86          23 :                 sub = ff_subtitles_queue_insert(&mpsub->q, buf.str, buf.len, 0);
      87          23 :                 if (!sub) {
      88           0 :                     res = AVERROR(ENOMEM);
      89           0 :                     goto end;
      90             :                 }
      91          23 :                 sub->pts = (int64_t)(current_pts + start*multiplier);
      92          23 :                 sub->duration = (int)(duration * multiplier);
      93          23 :                 current_pts += (start + duration) * multiplier;
      94          23 :                 sub->pos = pos;
      95             :             }
      96             :         }
      97             :     }
      98             : 
      99           2 :     st = avformat_new_stream(s, NULL);
     100           2 :     if (!st)
     101           0 :         return AVERROR(ENOMEM);
     102           2 :     avpriv_set_pts_info(st, 64, pts_info.den, pts_info.num);
     103           2 :     st->codecpar->codec_type = AVMEDIA_TYPE_SUBTITLE;
     104           2 :     st->codecpar->codec_id   = AV_CODEC_ID_TEXT;
     105             : 
     106           2 :     ff_subtitles_queue_finalize(s, &mpsub->q);
     107             : 
     108           2 : end:
     109           2 :     av_bprint_finalize(&buf, NULL);
     110           2 :     return res;
     111             : }
     112             : 
     113          25 : static int mpsub_read_packet(AVFormatContext *s, AVPacket *pkt)
     114             : {
     115          25 :     MPSubContext *mpsub = s->priv_data;
     116          25 :     return ff_subtitles_queue_read_packet(&mpsub->q, pkt);
     117             : }
     118             : 
     119           0 : static int mpsub_read_seek(AVFormatContext *s, int stream_index,
     120             :                            int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
     121             : {
     122           0 :     MPSubContext *mpsub = s->priv_data;
     123           0 :     return ff_subtitles_queue_seek(&mpsub->q, s, stream_index,
     124             :                                    min_ts, ts, max_ts, flags);
     125             : }
     126             : 
     127           2 : static int mpsub_read_close(AVFormatContext *s)
     128             : {
     129           2 :     MPSubContext *mpsub = s->priv_data;
     130           2 :     ff_subtitles_queue_clean(&mpsub->q);
     131           2 :     return 0;
     132             : }
     133             : 
     134             : AVInputFormat ff_mpsub_demuxer = {
     135             :     .name           = "mpsub",
     136             :     .long_name      = NULL_IF_CONFIG_SMALL("MPlayer subtitles"),
     137             :     .priv_data_size = sizeof(MPSubContext),
     138             :     .read_probe     = mpsub_probe,
     139             :     .read_header    = mpsub_read_header,
     140             :     .read_packet    = mpsub_read_packet,
     141             :     .read_seek2     = mpsub_read_seek,
     142             :     .read_close     = mpsub_read_close,
     143             :     .extensions     = "sub",
     144             : };

Generated by: LCOV version 1.13