src/lib/subtitle_analysis.cc

   1 /*
   2     Copyright (C) 2020-2021 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
  22 #include "subtitle_analysis.h"
  23 #include "exceptions.h"
  24 #include "warnings.h"
  25 #include <libcxml/cxml.h>
  26 #include <dcp/raw_convert.h>
  27 DCPOMATIC_DISABLE_WARNINGS
  28 #include <libxml++/libxml++.h>
  29 DCPOMATIC_ENABLE_WARNINGS
  30
  31
  32 using std::make_shared;
  33 using std::shared_ptr;
  34 using std::string;
  35 using dcp::raw_convert;
  36
  37
  38 int const SubtitleAnalysis::_current_state_version = 1;
  39
  40
  41 SubtitleAnalysis::SubtitleAnalysis (boost::filesystem::path path)
  42 {
  43         cxml::Document f ("SubtitleAnalysis");
  44
  45         f.read_file (path);
  46
  47         if (f.optional_number_child<int>("Version").get_value_or(1) < _current_state_version) {
  48                 /* Too old.  Throw an exception so that this analysis is re-run. */
  49                 throw OldFormatError ("Subtitle analysis file is too old");
  50         }
  51
  52         cxml::NodePtr bounding_box = f.optional_node_child("BoundingBox");
  53         if (bounding_box) {
  54                 _bounding_box = dcpomatic::Rect<double> ();
  55                 _bounding_box->x = bounding_box->number_child<double>("X");
  56                 _bounding_box->y = bounding_box->number_child<double>("Y");
  57                 _bounding_box->width = bounding_box->number_child<double>("Width");
  58                 _bounding_box->height = bounding_box->number_child<double>("Height");
  59         }
  60
  61         _analysis_x_offset = f.number_child<double>("AnalysisXOffset");
  62         _analysis_y_offset = f.number_child<double>("AnalysisYOffset");
  63 }
  64
  65
  66 void
  67 SubtitleAnalysis::write (boost::filesystem::path path) const
  68 {
  69         auto doc = make_shared<xmlpp::Document>();
  70         xmlpp::Element* root = doc->create_root_node ("SubtitleAnalysis");
  71
  72         root->add_child("Version")->add_child_text (raw_convert<string>(_current_state_version));
  73
  74         if (_bounding_box) {
  75                 auto bounding_box = root->add_child("BoundingBox");
  76                 bounding_box->add_child("X")->add_child_text(raw_convert<string>(_bounding_box->x));
  77                 bounding_box->add_child("Y")->add_child_text(raw_convert<string>(_bounding_box->y));
  78                 bounding_box->add_child("Width")->add_child_text(raw_convert<string>(_bounding_box->width));
  79                 bounding_box->add_child("Height")->add_child_text(raw_convert<string>(_bounding_box->height));
  80         }
  81
  82         root->add_child("AnalysisXOffset")->add_child_text(raw_convert<string>(_analysis_x_offset));
  83         root->add_child("AnalysisYOffset")->add_child_text(raw_convert<string>(_analysis_y_offset));
  84
  85         doc->write_to_file_formatted (path.string());
  86 }
  87