2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
4 * This file is part of CasparCG (www.casparcg.com).
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.
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.
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/>.
19 * Author: Helge Norberg, helge.norberg@svt.se
22 #include "../../stdafx.h"
24 #include "xml_scene_producer.h"
25 #include "expression_parser.h"
27 #include <boost/filesystem.hpp>
28 #include <boost/property_tree/ptree.hpp>
29 #include <boost/property_tree/xml_parser.hpp>
31 #include <common/env.h>
32 #include <core/producer/frame_producer.h>
36 #include "scene_producer.h"
38 namespace caspar { namespace core { namespace scene {
40 void deduce_expression(variable& var, const variable_repository& repo)
42 auto expr_str = var.original_expr();
43 auto trimmed = boost::trim_copy(expr_str);
45 if (boost::starts_with(trimmed, L"${") && boost::ends_with(trimmed, L"}"))
47 expr_str = trimmed.substr(2, expr_str.length() - 3);
50 var.as<double>().bind(parse_expression<double>(expr_str, repo));
51 else if (var.is<bool>())
52 var.as<bool>().bind(parse_expression<bool>(expr_str, repo));
53 else if (var.is<std::wstring>())
54 var.as<std::wstring>().bind(parse_expression<std::wstring>(expr_str, repo));
56 else if (!expr_str.empty())
58 var.from_string(expr_str);
62 spl::shared_ptr<core::frame_producer> create_xml_scene_producer(
63 const spl::shared_ptr<core::frame_factory>& frame_factory,
64 const core::video_format_desc& format_desc,
65 const std::vector<std::wstring>& params)
68 return core::frame_producer::empty();
70 std::wstring filename = env::media_folder() + L"\\" + params[0] + L".xml";
72 if (!boost::filesystem::is_regular_file(boost::filesystem::path(filename)))
73 return core::frame_producer::empty();
75 boost::property_tree::wptree root;
76 std::wifstream file(filename);
77 boost::property_tree::read_xml(
80 boost::property_tree::xml_parser::trim_whitespace
81 | boost::property_tree::xml_parser::no_comments);
83 int width = root.get<int>(L"scene.<xmlattr>.width");
84 int height = root.get<int>(L"scene.<xmlattr>.height");
86 auto scene = spl::make_shared<scene_producer>(width, height);
88 BOOST_FOREACH(auto elem, root.get_child(L"scene.variables"))
90 auto type = elem.second.get<std::wstring>(L"<xmlattr>.type");
91 auto id = elem.second.get<std::wstring>(L"<xmlattr>.id");
92 auto is_public = elem.second.get(L"<xmlattr>.public", false);
93 auto expr = elem.second.get_value<std::wstring>();
96 id = L"variable." + id;
98 if (type == L"number")
99 scene->create_variable<double>(id, is_public, expr);
100 else if (type == L"string")
101 scene->create_variable<std::wstring>(id, is_public, expr);
102 else if (type == L"bool")
103 scene->create_variable<bool>(id, is_public, expr);
106 BOOST_FOREACH(auto elem, root.get_child(L"scene.layers"))
108 auto id = elem.second.get<std::wstring>(L"<xmlattr>.id");
109 auto producer = create_producer(frame_factory, format_desc, elem.second.get<std::wstring>(L"producer"));
110 auto& layer = scene->create_layer(producer, 0, 0, id);
111 auto variable_prefix = L"layer." + id + L".";
113 layer.hidden = scene->create_variable<bool>(variable_prefix + L"hidden", false, elem.second.get(L"hidden", L"false"));
114 layer.position.x = scene->create_variable<double>(variable_prefix + L"x", false, elem.second.get<std::wstring>(L"x"));
115 layer.position.y = scene->create_variable<double>(variable_prefix + L"y", false, elem.second.get<std::wstring>(L"y"));
117 layer.adjustments.opacity = scene->create_variable<double>(variable_prefix + L"adjustment.opacity", false, elem.second.get(L"adjustments.opacity", L"1.0"));
119 scene->create_variable<double>(variable_prefix + L"width", false) = layer.producer.get()->pixel_constraints().width;
120 scene->create_variable<double>(variable_prefix + L"height", false) = layer.producer.get()->pixel_constraints().height;
122 BOOST_FOREACH(auto& var_name, producer->get_variables())
124 auto& var = producer->get_variable(var_name);
125 auto expr = elem.second.get<std::wstring>(L"parameters." + var_name, L"");
127 if (var.is<double>())
128 scene->create_variable<double>(variable_prefix + L"parameter." + var_name, false, expr) = var.as<double>();
129 else if (var.is<std::wstring>())
130 scene->create_variable<std::wstring>(variable_prefix + L"parameter." + var_name, false, expr) = var.as<std::wstring>();
131 else if (var.is<bool>())
132 scene->create_variable<bool>(variable_prefix + L"parameter." + var_name, false, expr) = var.as<bool>();
136 BOOST_FOREACH(auto& elem, root.get_child(L"scene.timelines"))
138 auto& variable = scene->get_variable(elem.second.get<std::wstring>(L"<xmlattr>.variable"));
140 BOOST_FOREACH(auto& k, elem.second)
142 if (k.first == L"<xmlattr>")
145 auto easing = k.second.get(L"<xmlattr>.easing", L"");
146 auto at = k.second.get<int64_t>(L"<xmlattr>.at");
148 if (variable.is<double>())
149 scene->add_keyframe(variable.as<double>(), k.second.get_value<double>(), at, easing);
150 else if (variable.is<int>())
151 scene->add_keyframe(variable.as<int>(), k.second.get_value<int>(), at, easing);
155 auto repo = [&scene](const std::wstring& name) -> variable&
157 return scene->get_variable(name);
160 BOOST_FOREACH(auto& var_name, scene->get_variables())
162 deduce_expression(scene->get_variable(var_name), repo);
165 auto params2 = params;
166 params2.erase(params2.begin());
168 scene->call(params2);