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 #include <iostream>
  24
  25 using std::list;
  26 using std::vector;
  27 using std::string;
  28 using std::cout;
  29 using boost::shared_ptr;
  30 using boost::optional;
  31 using boost::dynamic_pointer_cast;
  32
  33 SubRipDecoder::SubRipDecoder (shared_ptr<const SubRipContent> content)
  34         : SubtitleDecoder (content)
  35         , SubRip (content)
  36         , _next (0)
  37 {
  38
  39 }
  40
  41 void
  42 SubRipDecoder::seek (ContentTime time, bool accurate)
  43 {
  44         SubtitleDecoder::seek (time, accurate);
  45
  46         _next = 0;
  47         while (_next < _subtitles.size() && ContentTime::from_seconds (_subtitles[_next].from.all_as_seconds ()) < time) {
  48                 ++_next;
  49         }
  50 }
  51
  52 bool
  53 SubRipDecoder::pass (PassReason, bool)
  54 {
  55         if (_next >= _subtitles.size ()) {
  56                 return true;
  57         }
  58
  59         /* XXX: we are ignoring positioning specified in the file */
  60
  61         shared_ptr<const SubRipContent> content = dynamic_pointer_cast<const SubRipContent> (_subtitle_content);
  62         DCPOMATIC_ASSERT (content);
  63
  64         list<dcp::SubtitleString> out;
  65         for (list<sub::Line>::const_iterator i = _subtitles[_next].lines.begin(); i != _subtitles[_next].lines.end(); ++i) {
  66                 for (list<sub::Block>::const_iterator j = i->blocks.begin(); j != i->blocks.end(); ++j) {
  67                         out.push_back (
  68                                 dcp::SubtitleString (
  69                                         SubRipContent::font_id,
  70                                         j->italic,
  71                                         /* force the colour to whatever is configured */
  72                                         content->colour(),
  73                                         j->font_size.points (72 * 11),
  74                                         1.0,
  75                                         dcp::Time (_subtitles[_next].from.all_as_seconds(), 1000),
  76                                         dcp::Time (_subtitles[_next].to.all_as_seconds(), 1000),
  77                                         0,
  78                                         dcp::HALIGN_CENTER,
  79                                         i->vertical_position.line.get() * (1.5 / 22) + 0.8,
  80                                         dcp::VALIGN_TOP,
  81                                         j->text,
  82                                         content->outline() ? dcp::BORDER : dcp::NONE,
  83                                         content->outline_colour(),
  84                                         dcp::Time (0, 1000),
  85                                         dcp::Time (0, 1000)
  86                                         )
  87                                 );
  88                 }
  89         }
  90
  91         text_subtitle (content_time_period (_subtitles[_next]), out);
  92
  93         ++_next;
  94         return false;
  95 }
  96
  97 list<ContentTimePeriod>
  98 SubRipDecoder::image_subtitles_during (ContentTimePeriod, bool) const
  99 {
 100         return list<ContentTimePeriod> ();
 101 }
 102
 103 list<ContentTimePeriod>
 104 SubRipDecoder::text_subtitles_during (ContentTimePeriod p, bool starting) const
 105 {
 106         /* XXX: inefficient */
 107
 108         list<ContentTimePeriod> d;
 109
 110         for (vector<sub::Subtitle>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
 111                 ContentTimePeriod t = content_time_period (*i);
 112                 if ((starting && p.contains (t.from)) || (!starting && p.overlaps (t))) {
 113                         d.push_back (t);
 114                 }
 115         }
 116
 117         return d;
 118 }
 119
 120 ContentTimePeriod
 121 SubRipDecoder::content_time_period (sub::Subtitle s) const
 122 {
 123         return ContentTimePeriod (
 124                 ContentTime::from_seconds (s.from.all_as_seconds()),
 125                 ContentTime::from_seconds (s.to.all_as_seconds())
 126                 );
 127 }