src/lib/analyse_subtitles_job.cc

   1 /*
   2     Copyright (C) 2020 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic 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
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "analyse_subtitles_job.h"
  22 #include "playlist.h"
  23 #include "player.h"
  24 #include "subtitle_analysis.h"
  25 #include "bitmap_text.h"
  26 #include "render_text.h"
  27 #include "text_content.h"
  28 #include "image.h"
  29 #include <iostream>
  30
  31 #include "i18n.h"
  32
  33 using std::string;
  34 using boost::shared_ptr;
  35 using boost::weak_ptr;
  36
  37 AnalyseSubtitlesJob::AnalyseSubtitlesJob (shared_ptr<const Film> film, shared_ptr<Content> content)
  38         : Job (film)
  39         , _content (content)
  40         , _path (_film->subtitle_analysis_path(content))
  41 {
  42 }
  43
  44
  45 string
  46 AnalyseSubtitlesJob::name () const
  47 {
  48         return _("Analysing subtitles");
  49 }
  50
  51
  52 string
  53 AnalyseSubtitlesJob::json_name () const
  54 {
  55         return N_("analyse_subtitles");
  56 }
  57
  58
  59 void
  60 AnalyseSubtitlesJob::run ()
  61 {
  62         shared_ptr<Playlist> playlist (new Playlist());
  63         shared_ptr<Content> content = _content.lock ();
  64         DCPOMATIC_ASSERT (content);
  65         playlist->add (_film, content);
  66
  67         shared_ptr<Player> player (new Player(_film, playlist));
  68         player->set_ignore_audio ();
  69         player->set_fast ();
  70         player->set_play_referenced ();
  71         player->Text.connect (bind(&AnalyseSubtitlesJob::analyse, this, _1, _2));
  72
  73         set_progress_unknown ();
  74
  75         if (!content->text.empty()) {
  76                 while (!player->pass ()) {}
  77         }
  78
  79         SubtitleAnalysis analysis (_bounding_box, content->text.front()->x_offset(), content->text.front()->y_offset());
  80         analysis.write (_path);
  81
  82         set_progress (1);
  83         set_state (FINISHED_OK);
  84 }
  85
  86
  87 void
  88 AnalyseSubtitlesJob::analyse (PlayerText text, TextType type)
  89 {
  90         if (type != TEXT_OPEN_SUBTITLE) {
  91                 return;
  92         }
  93
  94         BOOST_FOREACH (BitmapText const& i, text.bitmap) {
  95                 if (!_bounding_box) {
  96                         _bounding_box = i.rectangle;
  97                 } else {
  98                         _bounding_box->extend (i.rectangle);
  99                 }
 100         }
 101
 102         if (!text.string.empty()) {
 103                 /* We can provide dummy values for time and frame rate here as they are only used to calculate fades */
 104                 dcp::Size const frame = _film->frame_size();
 105                 BOOST_FOREACH (PositionImage i, render_text(text.string, text.fonts, frame, dcpomatic::DCPTime(), 24)) {
 106                         dcpomatic::Rect<double> rect (
 107                                         double(i.position.x) / frame.width, double(i.position.y) / frame.height,
 108                                         double(i.image->size().width) / frame.width, double(i.image->size().height) / frame.height
 109                                         );
 110                         if (!_bounding_box) {
 111                                 _bounding_box = rect;
 112                         } else {
 113                                 _bounding_box->extend (rect);
 114                         }
 115                 }
 116         }
 117 }
 118