git.sesse.net Git - casparcg/blob - core/producer/scene/scene_producer.h

   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 #pragma once
  23
  24 #include <common/log.h>
  25
  26 #include "../frame_producer.h"
  27
  28 #include "../binding.h"
  29 #include "../variable.h"
  30
  31 namespace caspar { namespace core {
  32
  33 class frame_factory;
  34
  35 namespace scene {
  36
  37 struct coord
  38 {
  39         binding<double> x;
  40         binding<double> y;
  41 };
  42
  43 struct rect
  44 {
  45         coord upper_left;
  46         binding<double> width;
  47         binding<double> height;
  48 };
  49
  50 struct adjustments
  51 {
  52         binding<double> opacity;
  53
  54         adjustments();
  55 };
  56
  57 struct layer
  58 {
  59         binding<std::wstring> name;
  60         coord position;
  61         rect clipping;
  62         adjustments adjustments;
  63         binding<spl::shared_ptr<frame_producer>> producer;
  64         binding<bool> hidden;
  65         binding<bool> is_key;
  66
  67         explicit layer(const std::wstring& name, const spl::shared_ptr<frame_producer>& producer);
  68 };
  69
  70 struct keyframe
  71 {
  72         std::function<void ()> on_start_animate;
  73         std::function<void (int64_t start_frame, int64_t current_frame)> on_animate_to;
  74         std::function<void ()> on_destination_frame;
  75         int64_t destination_frame;
  76 public:
  77         keyframe(int64_t destination_frame)
  78                 : destination_frame(destination_frame)
  79         {
  80         }
  81 };
  82
  83 class scene_producer : public frame_producer_base
  84 {
  85 public:
  86         scene_producer(int width, int height);
  87         ~scene_producer();
  88
  89         class draw_frame receive_impl() override;
  90         constraints& pixel_constraints() override;
  91         void on_interaction(const interaction_event::ptr& event) override;
  92         bool collides(double x, double y) const override;
  93         std::wstring print() const override;
  94         std::wstring name() const override;
  95         boost::unique_future<std::wstring>      call(const std::vector<std::wstring>& params) override;
  96         boost::property_tree::wptree info() const override;
  97         void subscribe(const monitor::observable::observer_ptr& o) override;
  98         void unsubscribe(const monitor::observable::observer_ptr& o) override;
  99         layer& create_layer(
 100                         const spl::shared_ptr<frame_producer>& producer, int x, int y, const std::wstring& name);
 101         layer& create_layer(
 102                         const spl::shared_ptr<frame_producer>& producer, const std::wstring& name);
 103         binding<int64_t> frame();
 104         binding<double> speed();
 105
 106         template<typename T> binding<T>& create_variable(
 107                         const std::wstring& name, bool is_public, const std::wstring& expr = L"")
 108         {
 109                 std::shared_ptr<core::variable> var =
 110                                 std::make_shared<core::variable_impl<T>>(expr, is_public);
 111
 112                 store_variable(name, var);
 113
 114                 return var->as<T>();
 115         }
 116
 117         template<typename T>
 118         void add_keyframe(
 119                         binding<T>& to_affect,
 120                         T destination_value,
 121                         int64_t at_frame,
 122                         const std::wstring& easing)
 123         {
 124                 add_keyframe(to_affect, binding<T>(destination_value), at_frame, easing);
 125         }
 126
 127         template<typename T>
 128         void add_keyframe(
 129                         binding<T>& to_affect,
 130                         const binding<T>& destination_value,
 131                         int64_t at_frame,
 132                         const std::wstring& easing)
 133         {
 134                 if (easing.empty())
 135                 {
 136                         add_keyframe(to_affect, destination_value, at_frame);
 137                         return;
 138                 }
 139
 140                 tweener tween(easing);
 141                 keyframe k(at_frame);
 142
 143                 std::shared_ptr<T> start_value(new T);
 144
 145                 k.on_start_animate = [=]() mutable
 146                 {
 147                         *start_value = to_affect.get();
 148                         to_affect.unbind();
 149                 };
 150
 151                 k.on_destination_frame = [=]() mutable
 152                 {
 153                         to_affect.bind(destination_value);
 154                 };
 155
 156                 k.on_animate_to =
 157                                 [=](int64_t start_frame, int64_t current_frame) mutable
 158                                 {
 159                                         auto relative_frame = current_frame - start_frame;
 160                                         auto duration = at_frame - start_frame;
 161                                         auto tweened = static_cast<T>(tween(
 162                                                         static_cast<double>(relative_frame),
 163                                                         *start_value,
 164                                                         destination_value.get() - *start_value,
 165                                                         static_cast<double>(duration)));
 166
 167                                         to_affect.set(tweened);
 168
 169                                         //CASPAR_LOG(info) << relative_frame << L" " << *start_value << L" " << duration << L" " << tweened;
 170                                 };
 171
 172                 store_keyframe(to_affect.identity(), k);
 173         }
 174
 175         template<typename T>
 176         void add_keyframe(binding<T>& to_affect, T set_value, int64_t at_frame)
 177         {
 178                 add_keyframe(to_affect, binding<T>(set_value), at_frame);
 179         }
 180
 181         template<typename T>
 182         void add_keyframe(binding<T>& to_affect, const binding<T>& set_value, int64_t at_frame)
 183         {
 184                 keyframe k(at_frame);
 185
 186                 k.on_destination_frame = [=]() mutable
 187                 {
 188                         to_affect.bind(set_value);
 189                 };
 190
 191                 store_keyframe(to_affect.identity(), k);
 192         }
 193
 194         core::variable& get_variable(const std::wstring& name) override;
 195         const std::vector<std::wstring>& get_variables() const override;
 196 private:
 197         void store_keyframe(void* timeline_identity, const keyframe& k);
 198         void store_variable(
 199                         const std::wstring& name, const std::shared_ptr<core::variable>& var);
 200
 201         struct impl;
 202         std::unique_ptr<impl> impl_;
 203 };
 204
 205 spl::shared_ptr<frame_producer> create_dummy_scene_producer(const spl::shared_ptr<frame_factory>& frame_factory, const video_format_desc& format_desc, const std::vector<std::wstring>& params);
 206
 207 }}}