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         coord lower_right;
  47 };
  48
  49 struct corners
  50 {
  51         coord upper_left;
  52         coord upper_right;
  53         coord lower_right;
  54         coord lower_left;
  55 };
  56
  57 struct adjustments
  58 {
  59         binding<double> opacity;
  60
  61         adjustments();
  62 };
  63
  64 struct layer
  65 {
  66         binding<std::wstring>                                           name;
  67         scene::coord                                                            anchor;
  68         scene::coord                                                            position;
  69         scene::rect                                                                     crop;
  70         scene::corners                                                          perspective;
  71         binding<double>                                                         rotation;
  72         scene::adjustments                                                      adjustments;
  73         binding<spl::shared_ptr<frame_producer>>        producer;
  74         binding<bool>                                                           hidden;
  75         binding<bool>                                                           is_key;
  76
  77         explicit layer(const std::wstring& name, const spl::shared_ptr<frame_producer>& producer);
  78 };
  79
  80 struct keyframe
  81 {
  82         std::function<void ()>                                                                                          on_start_animate;
  83         std::function<void (int64_t start_frame, int64_t current_frame)>        on_animate_to;
  84         std::function<void ()>                                                                                          on_destination_frame;
  85         int64_t                                                                                                                         destination_frame;
  86 public:
  87         keyframe(int64_t destination_frame)
  88                 : destination_frame(destination_frame)
  89         {
  90         }
  91 };
  92
  93 class scene_producer : public frame_producer_base
  94 {
  95 public:
  96         scene_producer(int width, int height);
  97         ~scene_producer();
  98
  99         class draw_frame receive_impl() override;
 100         constraints& pixel_constraints() override;
 101         void on_interaction(const interaction_event::ptr& event) override;
 102         bool collides(double x, double y) const override;
 103         std::wstring print() const override;
 104         std::wstring name() const override;
 105         std::future<std::wstring>       call(const std::vector<std::wstring>& params) override;
 106         boost::property_tree::wptree info() const override;
 107         monitor::subject& monitor_output();
 108
 109         layer& create_layer(
 110                         const spl::shared_ptr<frame_producer>& producer, int x, int y, const std::wstring& name);
 111         layer& create_layer(
 112                         const spl::shared_ptr<frame_producer>& producer, const std::wstring& name);
 113         binding<int64_t> frame();
 114         binding<double> speed();
 115
 116         template<typename T> binding<T>& create_variable(
 117                         const std::wstring& name, bool is_public, const std::wstring& expr = L"")
 118         {
 119                 std::shared_ptr<core::variable> var =
 120                                 std::make_shared<core::variable_impl<T>>(expr, is_public);
 121
 122                 store_variable(name, var);
 123
 124                 return var->as<T>();
 125         }
 126
 127         template<typename T>
 128         void add_keyframe(
 129                         binding<T>& to_affect,
 130                         T destination_value,
 131                         int64_t at_frame,
 132                         const std::wstring& easing)
 133         {
 134                 add_keyframe(to_affect, binding<T>(destination_value), at_frame, easing);
 135         }
 136
 137         template<typename T>
 138         void add_keyframe(
 139                         binding<T>& to_affect,
 140                         const binding<T>& destination_value,
 141                         int64_t at_frame,
 142                         const std::wstring& easing)
 143         {
 144                 if (easing.empty())
 145                 {
 146                         add_keyframe(to_affect, destination_value, at_frame);
 147                         return;
 148                 }
 149
 150                 tweener tween(easing);
 151                 keyframe k(at_frame);
 152
 153                 std::shared_ptr<T> start_value(new T);
 154
 155                 k.on_start_animate = [=]() mutable
 156                 {
 157                         *start_value = to_affect.get();
 158                         to_affect.unbind();
 159                 };
 160
 161                 k.on_destination_frame = [=]() mutable
 162                 {
 163                         to_affect.bind(destination_value);
 164                 };
 165
 166                 k.on_animate_to =
 167                                 [=](int64_t start_frame, int64_t current_frame) mutable
 168                                 {
 169                                         auto relative_frame = current_frame - start_frame;
 170                                         auto duration = at_frame - start_frame;
 171                                         auto tweened = static_cast<T>(tween(
 172                                                         static_cast<double>(relative_frame),
 173                                                         *start_value,
 174                                                         destination_value.get() - *start_value,
 175                                                         static_cast<double>(duration)));
 176
 177                                         to_affect.set(tweened);
 178
 179                                         //CASPAR_LOG(info) << relative_frame << L" " << *start_value << L" " << duration << L" " << tweened;
 180                                 };
 181
 182                 store_keyframe(to_affect.identity(), k);
 183         }
 184
 185         template<typename T>
 186         void add_keyframe(binding<T>& to_affect, T set_value, int64_t at_frame)
 187         {
 188                 add_keyframe(to_affect, binding<T>(set_value), at_frame);
 189         }
 190
 191         template<typename T>
 192         void add_keyframe(binding<T>& to_affect, const binding<T>& set_value, int64_t at_frame)
 193         {
 194                 keyframe k(at_frame);
 195
 196                 k.on_destination_frame = [=]() mutable
 197                 {
 198                         to_affect.bind(set_value);
 199                 };
 200
 201                 store_keyframe(to_affect.identity(), k);
 202         }
 203
 204         core::variable& get_variable(const std::wstring& name) override;
 205         const std::vector<std::wstring>& get_variables() const override;
 206 private:
 207         void store_keyframe(void* timeline_identity, const keyframe& k);
 208         void store_variable(
 209                         const std::wstring& name, const std::shared_ptr<core::variable>& var);
 210
 211         struct impl;
 212         std::unique_ptr<impl> impl_;
 213 };
 214
 215 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);
 216
 217 }}}