src/lib/subrip_decoder.cc

   1 /*
   2     Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <dcp/subtitle_string.h>
  21 #include "subrip_decoder.h"
  22 #include "subrip_content.h"
  23
  24 using std::list;
  25 using std::vector;
  26 using std::string;
  27 using std::cout;
  28 using boost::shared_ptr;
  29 using boost::optional;
  30
  31 SubRipDecoder::SubRipDecoder (shared_ptr<const SubRipContent> content)
  32         : SubtitleDecoder (content)
  33         , SubRip (content)
  34         , _next (0)
  35 {
  36
  37 }
  38
  39 void
  40 SubRipDecoder::seek (ContentTime time, bool accurate)
  41 {
  42         SubtitleDecoder::seek (time, accurate);
  43
  44         _next = 0;
  45         while (_next < _subtitles.size() && ContentTime::from_seconds (_subtitles[_next].from.all_as_seconds ()) < time) {
  46                 ++_next;
  47         }
  48 }
  49
  50 bool
  51 SubRipDecoder::pass ()
  52 {
  53         if (_next >= _subtitles.size ()) {
  54                 return true;
  55         }
  56
  57         /* XXX: we are ignoring positioning specified in the file */
  58
  59         list<dcp::SubtitleString> out;
  60         for (list<sub::Line>::const_iterator i = _subtitles[_next].lines.begin(); i != _subtitles[_next].lines.end(); ++i) {
  61                 for (list<sub::Block>::const_iterator j = i->blocks.begin(); j != i->blocks.end(); ++j) {
  62                         out.push_back (
  63                                 dcp::SubtitleString (
  64                                         SubRipContent::font_id,
  65                                         j->italic,
  66                                         dcp::Colour (255, 255, 255),
  67                                         j->font_size.points (72 * 11),
  68                                         dcp::Time (_subtitles[_next].from.all_as_seconds()),
  69                                         dcp::Time (_subtitles[_next].to.all_as_seconds()),
  70                                         i->vertical_position.line.get() * (1.5 / 22) + 0.8,
  71                                         dcp::TOP,
  72                                         j->text,
  73                                         dcp::NONE,
  74                                         dcp::Colour (255, 255, 255),
  75                                         0,
  76                                         0
  77                                         )
  78                                 );
  79                 }
  80         }
  81
  82         text_subtitle (out);
  83         ++_next;
  84         return false;
  85 }
  86
  87 list<ContentTimePeriod>
  88 SubRipDecoder::image_subtitles_during (ContentTimePeriod, bool) const
  89 {
  90         return list<ContentTimePeriod> ();
  91 }
  92
  93 list<ContentTimePeriod>
  94 SubRipDecoder::text_subtitles_during (ContentTimePeriod p, bool starting) const
  95 {
  96         /* XXX: inefficient */
  97
  98         list<ContentTimePeriod> d;
  99
 100         for (vector<sub::Subtitle>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
 101
 102                 ContentTimePeriod t (
 103                         ContentTime::from_seconds (i->from.all_as_seconds()),
 104                         ContentTime::from_seconds (i->to.all_as_seconds())
 105                         );
 106
 107                 if ((starting && p.contains (t.from)) || (!starting && p.overlaps (t))) {
 108                         d.push_back (t);
 109                 }
 110         }
 111
 112         return d;
 113 }