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
  32 SubRipDecoder::SubRipDecoder (shared_ptr<const SubRipContent> content)
  33         : SubtitleDecoder (content)
  34         , SubRip (content)
  35         , _next (0)
  36 {
  37
  38 }
  39
  40 void
  41 SubRipDecoder::seek (ContentTime time, bool accurate)
  42 {
  43         SubtitleDecoder::seek (time, accurate);
  44
  45         _next = 0;
  46         while (_next < _subtitles.size() && ContentTime::from_seconds (_subtitles[_next].from.all_as_seconds ()) < time) {
  47                 ++_next;
  48         }
  49 }
  50
  51 bool
  52 SubRipDecoder::pass ()
  53 {
  54         if (_next >= _subtitles.size ()) {
  55                 return true;
  56         }
  57
  58         /* XXX: we are ignoring positioning specified in the file */
  59
  60         list<dcp::SubtitleString> out;
  61         for (list<sub::Line>::const_iterator i = _subtitles[_next].lines.begin(); i != _subtitles[_next].lines.end(); ++i) {
  62                 for (list<sub::Block>::const_iterator j = i->blocks.begin(); j != i->blocks.end(); ++j) {
  63                         out.push_back (
  64                                 dcp::SubtitleString (
  65                                         SubRipContent::font_id,
  66                                         j->italic,
  67                                         dcp::Colour (j->colour.r * 255, j->colour.g * 255, j->colour.b * 255),
  68                                         j->font_size.points (72 * 11),
  69                                         1.0,
  70                                         dcp::Time (_subtitles[_next].from.all_as_seconds()),
  71                                         dcp::Time (_subtitles[_next].to.all_as_seconds()),
  72                                         0,
  73                                         dcp::HALIGN_CENTER,
  74                                         i->vertical_position.line.get() * (1.5 / 22) + 0.8,
  75                                         dcp::VALIGN_TOP,
  76                                         j->text,
  77                                         dcp::NONE,
  78                                         dcp::Colour (255, 255, 255),
  79                                         0,
  80                                         0
  81                                         )
  82                                 );
  83                 }
  84         }
  85
  86         text_subtitle (content_time_period (_subtitles[_next]), out);
  87
  88         ++_next;
  89         return false;
  90 }
  91
  92 list<ContentTimePeriod>
  93 SubRipDecoder::image_subtitles_during (ContentTimePeriod, bool) const
  94 {
  95         return list<ContentTimePeriod> ();
  96 }
  97
  98 list<ContentTimePeriod>
  99 SubRipDecoder::text_subtitles_during (ContentTimePeriod p, bool starting) const
 100 {
 101         /* XXX: inefficient */
 102
 103         list<ContentTimePeriod> d;
 104
 105         for (vector<sub::Subtitle>::const_iterator i = _subtitles.begin(); i != _subtitles.end(); ++i) {
 106                 ContentTimePeriod t = content_time_period (*i);
 107                 if ((starting && p.contains (t.from)) || (!starting && p.overlaps (t))) {
 108                         d.push_back (t);
 109                 }
 110         }
 111
 112         return d;
 113 }
 114
 115 ContentTimePeriod
 116 SubRipDecoder::content_time_period (sub::Subtitle s) const
 117 {
 118         return ContentTimePeriod (
 119                 ContentTime::from_seconds (s.from.all_as_seconds()),
 120                 ContentTime::from_seconds (s.to.all_as_seconds())
 121                 );
 122 }