src/lib/dcp_subtitle_content.cc

   1 /*
   2     Copyright (C) 2014-2021 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 "font.h"
  22 #include "dcp_subtitle_content.h"
  23 #include "film.h"
  24 #include "font_id_allocator.h"
  25 #include "text_content.h"
  26 #include <dcp/raw_convert.h>
  27 #include <dcp/interop_subtitle_asset.h>
  28 #include <dcp/smpte_subtitle_asset.h>
  29 #include <dcp/interop_load_font_node.h>
  30 #include <libxml++/libxml++.h>
  31
  32 #include "i18n.h"
  33
  34 using std::dynamic_pointer_cast;
  35 using std::list;
  36 using std::make_shared;
  37 using std::shared_ptr;
  38 using std::string;
  39 using dcp::raw_convert;
  40 using namespace dcpomatic;
  41
  42 DCPSubtitleContent::DCPSubtitleContent (boost::filesystem::path path)
  43         : Content (path)
  44 {
  45         text.push_back (make_shared<TextContent>(this, TextType::OPEN_SUBTITLE, TextType::OPEN_SUBTITLE));
  46 }
  47
  48 DCPSubtitleContent::DCPSubtitleContent (cxml::ConstNodePtr node, int version)
  49         : Content (node)
  50         , _length (node->number_child<ContentTime::Type> ("Length"))
  51 {
  52         list<string> notes;
  53         text = TextContent::from_xml (this, node, version, notes);
  54 }
  55
  56 void
  57 DCPSubtitleContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
  58 {
  59         Content::examine (film, job);
  60
  61         auto subtitle_asset = load(path(0));
  62
  63         auto iop = dynamic_pointer_cast<dcp::InteropSubtitleAsset>(subtitle_asset);
  64         auto smpte = dynamic_pointer_cast<dcp::SMPTESubtitleAsset>(subtitle_asset);
  65         if (smpte) {
  66                 set_video_frame_rate(film, smpte->edit_rate().numerator);
  67         }
  68
  69         boost::mutex::scoped_lock lm (_mutex);
  70
  71         /* Default to turning these subtitles on */
  72         only_text()->set_use (true);
  73
  74         _length = ContentTime::from_seconds(subtitle_asset->latest_subtitle_out().as_seconds());
  75
  76         subtitle_asset->fix_empty_font_ids();
  77         add_fonts(only_text(), subtitle_asset);
  78 }
  79
  80
  81 void
  82 DCPSubtitleContent::add_fonts(shared_ptr<TextContent> content, shared_ptr<dcp::SubtitleAsset> subtitle_asset)
  83 {
  84         FontIDAllocator font_id_allocator;
  85
  86         for (auto node: subtitle_asset->load_font_nodes()) {
  87                 font_id_allocator.add_font(0, subtitle_asset->id(), node->id);
  88         }
  89         font_id_allocator.allocate();
  90
  91         auto font_data = subtitle_asset->font_data();
  92         for (auto node: subtitle_asset->load_font_nodes()) {
  93                 auto data = font_data.find(node->id);
  94                 shared_ptr<dcpomatic::Font> font;
  95                 if (data != font_data.end()) {
  96                         font = make_shared<Font>(
  97                                 font_id_allocator.font_id(0, subtitle_asset->id(), node->id),
  98                                 data->second
  99                                 );
 100                 } else {
 101                         font = make_shared<Font>(
 102                                 font_id_allocator.font_id(0, subtitle_asset->id(), node->id)
 103                                 );
 104                 }
 105                 content->add_font(font);
 106         }
 107
 108         if (!font_id_allocator.has_default_font()) {
 109                 content->add_font(make_shared<dcpomatic::Font>(font_id_allocator.default_font_id(), default_font_file()));
 110         }
 111 }
 112
 113
 114 DCPTime
 115 DCPSubtitleContent::full_length (shared_ptr<const Film> film) const
 116 {
 117         FrameRateChange const frc (film, shared_from_this());
 118         return DCPTime (_length, frc);
 119 }
 120
 121 DCPTime
 122 DCPSubtitleContent::approximate_length () const
 123 {
 124         return DCPTime (_length, FrameRateChange());
 125 }
 126
 127 string
 128 DCPSubtitleContent::summary () const
 129 {
 130         return path_summary() + " " + _("[subtitles]");
 131 }
 132
 133 string
 134 DCPSubtitleContent::technical_summary () const
 135 {
 136         return Content::technical_summary() + " - " + _("DCP XML subtitles");
 137 }
 138
 139 void
 140 DCPSubtitleContent::as_xml (xmlpp::Node* node, bool with_paths) const
 141 {
 142         node->add_child("Type")->add_child_text ("DCPSubtitle");
 143         Content::as_xml (node, with_paths);
 144
 145         if (only_text()) {
 146                 only_text()->as_xml (node);
 147         }
 148
 149         node->add_child("Length")->add_child_text (raw_convert<string> (_length.get ()));
 150 }