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 #include "expression_parser.h"
  26
  27 #include <boost/filesystem.hpp>
  28 #include <boost/filesystem/fstream.hpp>
  29 #include <boost/property_tree/ptree.hpp>
  30 #include <boost/property_tree/xml_parser.hpp>
  31
  32 #include <common/env.h>
  33 #include <core/producer/frame_producer.h>
  34 #include <core/help/help_repository.h>
  35 #include <core/help/help_sink.h>
  36
  37 #include <future>
  38
  39 #include "scene_producer.h"
  40 #include "scene_cg_proxy.h"
  41
  42 namespace caspar { namespace core { namespace scene {
  43
  44 void deduce_expression(variable& var, const variable_repository& repo)
  45 {
  46         auto expr_str = var.original_expr();
  47         auto trimmed = boost::trim_copy(expr_str);
  48
  49         if (boost::starts_with(trimmed, L"${") && boost::ends_with(trimmed, L"}"))
  50         {
  51                 expr_str = trimmed.substr(2, expr_str.length() - 3);
  52
  53                 if (var.is<double>())
  54                         var.as<double>().bind(parse_expression<double>(expr_str, repo));
  55                 else if (var.is<bool>())
  56                         var.as<bool>().bind(parse_expression<bool>(expr_str, repo));
  57                 else if (var.is<std::wstring>())
  58                         var.as<std::wstring>().bind(parse_expression<std::wstring>(expr_str, repo));
  59         }
  60         else if (!expr_str.empty())
  61         {
  62                 var.from_string(expr_str);
  63         }
  64 }
  65
  66 void describe_xml_scene_producer(core::help_sink& sink, const core::help_repository& repo)
  67 {
  68         sink.short_description(L"A simple producer for dynamic graphics using .scene files.");
  69         sink.syntax(L"[.scene_filename:string] {[param1:string] [value1:string]} {[param2:string] [value2:string]} ...");
  70         sink.para()->text(L"A simple producer that looks in the ")->code(L"templates")->text(L" folder for .scene files.");
  71         sink.para()->text(L"The .scene file is a simple XML document containing variables, layers and timelines.");
  72         sink.example(L">> PLAY 1-10 scene_name_sign FIRSTNAME \"John\" LASTNAME \"Doe\"", L"loads and plays templates/scene_name_sign.scene and sets the variables FIRSTNAME and LASTNAME.");
  73         sink.para()->text(L"The scene producer also supports setting the variables while playing via the CALL command:");
  74         sink.example(L">> CALL 1-10 FIRSTNAME \"Jane\"", L"changes the variable FIRSTNAME on an already loaded scene.");
  75 }
  76
  77 spl::shared_ptr<core::frame_producer> create_xml_scene_producer(
  78                 const core::frame_producer_dependencies& dependencies,
  79                 const std::vector<std::wstring>& params)
  80 {
  81         if (params.empty())
  82                 return core::frame_producer::empty();
  83
  84         std::wstring filename = env::template_folder() + L"/" + params.at(0) + L".scene";
  85
  86         if (!boost::filesystem::is_regular_file(boost::filesystem::path(filename)))
  87                 return core::frame_producer::empty();
  88
  89         boost::property_tree::wptree root;
  90         boost::filesystem::wifstream file(filename);
  91         boost::property_tree::read_xml(
  92                         file,
  93                         root,
  94                         boost::property_tree::xml_parser::trim_whitespace
  95                                         | boost::property_tree::xml_parser::no_comments);
  96
  97         int width = root.get<int>(L"scene.<xmlattr>.width");
  98         int height = root.get<int>(L"scene.<xmlattr>.height");
  99
 100         auto scene = spl::make_shared<scene_producer>(width, height, dependencies.format_desc);
 101
 102         for (auto elem : root.get_child(L"scene.variables"))
 103         {
 104                 auto type = elem.second.get<std::wstring>(L"<xmlattr>.type");
 105                 auto id = elem.second.get<std::wstring>(L"<xmlattr>.id");
 106                 auto is_public = elem.second.get(L"<xmlattr>.public", false);
 107                 auto expr = elem.second.get_value<std::wstring>();
 108
 109                 if (!is_public)
 110                         id = L"variable." + id;
 111
 112                 if (type == L"number")
 113                         scene->create_variable<double>(id, is_public, expr);
 114                 else if (type == L"string")
 115                         scene->create_variable<std::wstring>(id, is_public, expr);
 116                 else if (type == L"bool")
 117                         scene->create_variable<bool>(id, is_public, expr);
 118         }
 119
 120         for (auto& elem : root.get_child(L"scene.layers"))
 121         {
 122                 auto id = elem.second.get<std::wstring>(L"<xmlattr>.id");
 123                 auto producer = dependencies.producer_registry->create_producer(dependencies, elem.second.get<std::wstring>(L"producer"));
 124                 auto& layer = scene->create_layer(producer, 0, 0, id);
 125                 auto variable_prefix = L"layer." + id + L".";
 126
 127                 layer.hidden = scene->create_variable<bool>(variable_prefix + L"hidden", false, elem.second.get(L"hidden", L"false"));
 128                 layer.position.x = scene->create_variable<double>(variable_prefix + L"x", false, elem.second.get<std::wstring>(L"x"));
 129                 layer.position.y = scene->create_variable<double>(variable_prefix + L"y", false, elem.second.get<std::wstring>(L"y"));
 130                 layer.anchor.x = scene->create_variable<double>(variable_prefix + L"anchor_x", false, elem.second.get<std::wstring>(L"anchor_x", L"0.0"));
 131                 layer.anchor.y = scene->create_variable<double>(variable_prefix + L"anchor_y", false, elem.second.get<std::wstring>(L"anchor_y", L"0.0"));
 132                 layer.rotation = scene->create_variable<double>(variable_prefix + L"rotation", false, elem.second.get<std::wstring>(L"rotation", L"0.0"));
 133                 layer.crop.upper_left.x = scene->create_variable<double>(variable_prefix + L"crop_upper_left_x", false, elem.second.get<std::wstring>(L"crop_upper_left_x", L"0.0"));
 134                 layer.crop.upper_left.y = scene->create_variable<double>(variable_prefix + L"crop_upper_left_y", false, elem.second.get<std::wstring>(L"crop_upper_left_y", L"0.0"));
 135                 layer.crop.lower_right.x = scene->create_variable<double>(variable_prefix + L"crop_lower_right_x", false, elem.second.get<std::wstring>(L"crop_lower_right_x", layer.producer.get()->pixel_constraints().width.as<std::wstring>().get()));
 136                 layer.crop.lower_right.y = scene->create_variable<double>(variable_prefix + L"crop_lower_right_y", false, elem.second.get<std::wstring>(L"crop_lower_right_y", layer.producer.get()->pixel_constraints().height.as<std::wstring>().get()));
 137                 layer.perspective.upper_left.x = scene->create_variable<double>(variable_prefix + L"perspective_upper_left_x", false, elem.second.get<std::wstring>(L"perspective_upper_left_x", L"0.0"));
 138                 layer.perspective.upper_left.y = scene->create_variable<double>(variable_prefix + L"perspective_upper_left_y", false, elem.second.get<std::wstring>(L"perspective_upper_left_y", L"0.0"));
 139                 layer.perspective.upper_right.x = scene->create_variable<double>(variable_prefix + L"perspective_upper_right_x", false, elem.second.get<std::wstring>(L"perspective_upper_right_x", layer.producer.get()->pixel_constraints().width.as<std::wstring>().get()));
 140                 layer.perspective.upper_right.y = scene->create_variable<double>(variable_prefix + L"perspective_upper_right_y", false, elem.second.get<std::wstring>(L"perspective_upper_right_y", L"0.0"));
 141                 layer.perspective.lower_right.x = scene->create_variable<double>(variable_prefix + L"perspective_lower_right_x", false, elem.second.get<std::wstring>(L"perspective_lower_right_x", layer.producer.get()->pixel_constraints().width.as<std::wstring>().get()));
 142                 layer.perspective.lower_right.y = scene->create_variable<double>(variable_prefix + L"perspective_lower_right_y", false, elem.second.get<std::wstring>(L"perspective_lower_right_y", layer.producer.get()->pixel_constraints().height.as<std::wstring>().get()));
 143                 layer.perspective.lower_left.x = scene->create_variable<double>(variable_prefix + L"perspective_lower_left_x", false, elem.second.get<std::wstring>(L"perspective_lower_left_x", L"0.0"));
 144                 layer.perspective.lower_left.y = scene->create_variable<double>(variable_prefix + L"perspective_lower_left_y", false, elem.second.get<std::wstring>(L"perspective_lower_left_y", layer.producer.get()->pixel_constraints().height.as<std::wstring>().get()));
 145
 146                 layer.adjustments.opacity = scene->create_variable<double>(variable_prefix + L"adjustment.opacity", false, elem.second.get(L"adjustments.opacity", L"1.0"));
 147                 layer.is_key = scene->create_variable<bool>(variable_prefix + L"is_key", false, elem.second.get(L"is_key", L"false"));
 148                 layer.use_mipmap = scene->create_variable<bool>(variable_prefix + L"use_mipmap", false, elem.second.get(L"use_mipmap", L"false"));
 149                 layer.blend_mode = scene->create_variable<std::wstring>(variable_prefix + L"blend_mode", false, elem.second.get(L"blend_mode", L"normal")).transformed([](const std::wstring& b) { return get_blend_mode(b); });
 150                 layer.chroma_key.key = scene->create_variable<std::wstring>(variable_prefix + L"chroma_key.key", false, elem.second.get(L"chroma_key.key", L"none")).transformed([](const std::wstring& k) { return get_chroma_mode(k); });
 151                 layer.chroma_key.threshold = scene->create_variable<double>(variable_prefix + L"chroma_key.threshold", false, elem.second.get(L"chroma_key.threshold", L"0.0"));
 152                 layer.chroma_key.softness = scene->create_variable<double>(variable_prefix + L"chroma_key.softness", false, elem.second.get(L"chroma_key.softness", L"0.0"));
 153                 layer.chroma_key.spill = scene->create_variable<double>(variable_prefix + L"chroma_key.spill", false, elem.second.get(L"chroma_key.spill", L"0.0"));
 154
 155                 scene->create_variable<double>(variable_prefix + L"width", false) = layer.producer.get()->pixel_constraints().width;
 156                 scene->create_variable<double>(variable_prefix + L"height", false) = layer.producer.get()->pixel_constraints().height;
 157
 158                 for (auto& var_name : producer->get_variables())
 159                 {
 160                         auto& var = producer->get_variable(var_name);
 161                         auto expr = elem.second.get<std::wstring>(L"parameters." + var_name, L"");
 162
 163                         if (var.is<double>())
 164                                 scene->create_variable<double>(variable_prefix + L"parameter." + var_name, false, expr) = var.as<double>();
 165                         else if (var.is<std::wstring>())
 166                                 scene->create_variable<std::wstring>(variable_prefix + L"parameter." + var_name, false, expr) = var.as<std::wstring>();
 167                         else if (var.is<bool>())
 168                                 scene->create_variable<bool>(variable_prefix + L"parameter." + var_name, false, expr) = var.as<bool>();
 169                 }
 170         }
 171
 172         if (root.get_child_optional(L"scene.marks"))
 173         {
 174                 for (auto& mark : root.get_child(L"scene.marks"))
 175                 {
 176                         auto at = mark.second.get<int64_t>(L"<xmlattr>.at");
 177                         auto type = get_mark_action(mark.second.get<std::wstring>(L"<xmlattr>.type"));
 178                         auto label = mark.second.get(L"<xmlattr>.label", L"");
 179
 180                         scene->add_mark(at, type, label);
 181                 }
 182         }
 183
 184         for (auto& elem : root.get_child(L"scene.timelines"))
 185         {
 186                 auto& variable = scene->get_variable(elem.second.get<std::wstring>(L"<xmlattr>.variable"));
 187
 188                 for (auto& k : elem.second)
 189                 {
 190                         if (k.first == L"<xmlattr>")
 191                                 continue;
 192
 193                         auto easing = k.second.get(L"<xmlattr>.easing", L"");
 194                         auto at = k.second.get<int64_t>(L"<xmlattr>.at");
 195
 196                         if (variable.is<double>())
 197                                 scene->add_keyframe(variable.as<double>(), k.second.get_value<double>(), at, easing);
 198                         else if (variable.is<int>())
 199                                 scene->add_keyframe(variable.as<int>(), k.second.get_value<int>(), at, easing);
 200                 }
 201         }
 202
 203         auto repo = [&scene](const std::wstring& name) -> variable&
 204         {
 205                 return scene->get_variable(name);
 206         };
 207
 208         for (auto& var_name : scene->get_variables())
 209         {
 210                 deduce_expression(scene->get_variable(var_name), repo);
 211         }
 212
 213         auto params2 = params;
 214         params2.erase(params2.begin());
 215
 216         scene->call(params2);
 217
 218         return scene;
 219 }
 220
 221 void init(module_dependencies dependencies)
 222 {
 223         dependencies.producer_registry->register_producer_factory(L"XML Scene Producer", create_xml_scene_producer, describe_xml_scene_producer);
 224         dependencies.cg_registry->register_cg_producer(
 225                         L"scene",
 226                         { L".scene" },
 227                         [](const std::wstring& filename) { return ""; },
 228                         [](const spl::shared_ptr<core::frame_producer>& producer)
 229                         {
 230                                 return spl::make_shared<core::scene::scene_cg_proxy>(producer);
 231                         },
 232                         [](
 233                         const core::frame_producer_dependencies& dependencies,
 234                         const std::wstring& filename)
 235                         {
 236                                 return create_xml_scene_producer(dependencies, { filename });
 237                         },
 238                         false);
 239 }
 240
 241 }}}