git.sesse.net Git - casparcg/blob - core/producer/scene/xml_scene_producer.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG 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 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG 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 CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Helge Norberg, helge.norberg@svt.se
  20 */
  21
  22 #include "../../stdafx.h"
  23
  24 #include "xml_scene_producer.h"
  25
  26 #include <boost/filesystem.hpp>
  27 #include <boost/property_tree/ptree.hpp>
  28 #include <boost/property_tree/xml_parser.hpp>
  29
  30 #include <common/env.h>
  31 #include <core/producer/frame_producer.h>
  32
  33 #include "scene_producer.h"
  34
  35 namespace caspar { namespace core { namespace scene {
  36
  37 spl::shared_ptr<core::frame_producer> create_xml_scene_producer(
  38                 const spl::shared_ptr<core::frame_factory>& frame_factory,
  39                 const core::video_format_desc& format_desc,
  40                 const std::vector<std::wstring>& params)
  41 {
  42         if (params.empty())
  43                 return core::frame_producer::empty();
  44
  45         std::wstring filename = env::media_folder() + L"\\" + params[0] + L".xml";
  46
  47         if (!boost::filesystem::is_regular_file(boost::filesystem::path(filename)))
  48                 return core::frame_producer::empty();
  49
  50         boost::property_tree::wptree root;
  51         std::wifstream file(filename);
  52         boost::property_tree::read_xml(
  53                         file,
  54                         root,
  55                         boost::property_tree::xml_parser::trim_whitespace
  56                                         | boost::property_tree::xml_parser::no_comments);
  57
  58         int width = root.get<int>(L"scene.<xmlattr>.width");
  59         int height = root.get<int>(L"scene.<xmlattr>.height");
  60
  61         auto scene = spl::make_shared<scene_producer>(width, height);
  62
  63         BOOST_FOREACH(auto elem, root.get_child(L"scene.variables"))
  64         {
  65                 auto type = elem.second.get<std::wstring>(L"<xmlattr>.type");
  66
  67                 if (type == L"double")
  68                         scene->create_variable<double>(
  69                                         L"variable." + elem.second.get<std::wstring>(L"<xmlattr>.id"),
  70                                         false,
  71                                         elem.second.get_value<std::wstring>());
  72         }
  73
  74         BOOST_FOREACH(auto elem, root.get_child(L"scene.layers"))
  75         {
  76                 auto id = elem.second.get<std::wstring>(L"<xmlattr>.id");
  77                 auto producer = create_producer(frame_factory, format_desc, elem.second.get<std::wstring>(L"producer"));
  78                 auto& layer = scene->create_layer(producer, 0, 0, id);
  79                 auto variable_prefix = L"layer." + id + L".";
  80
  81                 layer.hidden = scene->create_variable<bool>(variable_prefix + L"hidden", false, elem.second.get(L"hidden", L"false"));
  82                 layer.position.x = scene->create_variable<double>(variable_prefix + L"x", false, elem.second.get<std::wstring>(L"x"));
  83                 layer.position.y = scene->create_variable<double>(variable_prefix + L"y", false, elem.second.get<std::wstring>(L"y"));
  84
  85                 scene->create_variable<double>(variable_prefix + L"width", false) = layer.producer.get()->pixel_constraints().width;
  86                 scene->create_variable<double>(variable_prefix + L"height", false) = layer.producer.get()->pixel_constraints().height;
  87         }
  88
  89         BOOST_FOREACH(auto& elem, root.get_child(L"scene.timelines"))
  90         {
  91                 auto& variable = scene->get_variable(elem.second.get<std::wstring>(L"<xmlattr>.variable"));
  92
  93                 BOOST_FOREACH(auto& k, elem.second)
  94                 {
  95                         if (k.first == L"<xmlattr>")
  96                                 continue;
  97
  98                         auto easing = k.second.get(L"<xmlattr>.easing", L"");
  99                         auto at = k.second.get<int64_t>(L"<xmlattr>.at");
 100
 101                         if (variable.is<double>())
 102                                 scene->add_keyframe(variable.as<double>(), k.second.get_value<double>(), at, easing);
 103                         else if (variable.is<int>())
 104                                 scene->add_keyframe(variable.as<int>(), k.second.get_value<int>(), at, easing);
 105                 }
 106         }
 107
 108         BOOST_FOREACH(auto& elem, root.get_child(L"scene.parameters"))
 109         {
 110                 auto& variable = scene->get_variable(elem.second.get<std::wstring>(L"<xmlattr>.variable"));
 111                 auto id = elem.second.get<std::wstring>(L"<xmlattr>.id");
 112
 113                 if (variable.is<double>())
 114                         scene->create_variable<double>(id, true) = variable.as<double>();
 115                 else if (variable.is<std::wstring>())
 116                         scene->create_variable<std::wstring>(id, true) = variable.as<std::wstring>();
 117         }
 118
 119         return scene;
 120 }
 121
 122 }}}