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 chroma_key
  65 {
  66         binding<core::chroma::type>     key;
  67         binding<double>                         threshold;
  68         binding<double>                         softness;
  69         binding<double>                         spill;
  70 };
  71
  72 struct layer
  73 {
  74         binding<std::wstring>                                           name;
  75         scene::coord                                                            anchor;
  76         scene::coord                                                            position;
  77         scene::rect                                                                     crop;
  78         scene::corners                                                          perspective;
  79         binding<double>                                                         rotation;
  80         scene::adjustments                                                      adjustments;
  81         binding<spl::shared_ptr<frame_producer>>        producer;
  82         binding<bool>                                                           hidden;
  83         binding<bool>                                                           is_key;
  84         binding<bool>                                                           use_mipmap;
  85         binding<core::blend_mode>                                       blend_mode;
  86         scene::chroma_key                                                       chroma_key;
  87
  88         explicit layer(const std::wstring& name, const spl::shared_ptr<frame_producer>& producer);
  89 };
  90
  91 struct keyframe
  92 {
  93         std::function<void ()>                                                                                          on_start_animate;
  94         std::function<void (int64_t start_frame, int64_t current_frame)>        on_animate_to;
  95         std::function<void ()>                                                                                          on_destination_frame;
  96         int64_t                                                                                                                         destination_frame;
  97 public:
  98         keyframe(int64_t destination_frame)
  99                 : destination_frame(destination_frame)
 100         {
 101         }
 102 };
 103
 104 class scene_producer : public frame_producer_base
 105 {
 106 public:
 107         scene_producer(int width, int height);
 108         ~scene_producer();
 109
 110         class draw_frame receive_impl() override;
 111         constraints& pixel_constraints() override;
 112         void on_interaction(const interaction_event::ptr& event) override;
 113         bool collides(double x, double y) const override;
 114         std::wstring print() const override;
 115         std::wstring name() const override;
 116         std::future<std::wstring>       call(const std::vector<std::wstring>& params) override;
 117         boost::property_tree::wptree info() const override;
 118         monitor::subject& monitor_output();
 119
 120         layer& create_layer(
 121                         const spl::shared_ptr<frame_producer>& producer, int x, int y, const std::wstring& name);
 122         layer& create_layer(
 123                         const spl::shared_ptr<frame_producer>& producer, const std::wstring& name);
 124         binding<int64_t> frame();
 125         binding<double> speed();
 126
 127         template<typename T> binding<T>& create_variable(
 128                         const std::wstring& name, bool is_public, const std::wstring& expr = L"")
 129         {
 130                 std::shared_ptr<core::variable> var =
 131                                 std::make_shared<core::variable_impl<T>>(expr, is_public);
 132
 133                 store_variable(name, var);
 134
 135                 return var->as<T>();
 136         }
 137
 138         template<typename T>
 139         void add_keyframe(
 140                         binding<T>& to_affect,
 141                         T destination_value,
 142                         int64_t at_frame,
 143                         const std::wstring& easing)
 144         {
 145                 add_keyframe(to_affect, binding<T>(destination_value), at_frame, easing);
 146         }
 147
 148         template<typename T>
 149         void add_keyframe(
 150                         binding<T>& to_affect,
 151                         const binding<T>& destination_value,
 152                         int64_t at_frame,
 153                         const std::wstring& easing)
 154         {
 155                 if (easing.empty())
 156                 {
 157                         add_keyframe(to_affect, destination_value, at_frame);
 158                         return;
 159                 }
 160
 161                 tweener tween(easing);
 162                 keyframe k(at_frame);
 163
 164                 std::shared_ptr<T> start_value(new T);
 165
 166                 k.on_start_animate = [=]() mutable
 167                 {
 168                         *start_value = to_affect.get();
 169                         to_affect.unbind();
 170                 };
 171
 172                 k.on_destination_frame = [=]() mutable
 173                 {
 174                         to_affect.bind(destination_value);
 175                 };
 176
 177                 k.on_animate_to =
 178                                 [=](int64_t start_frame, int64_t current_frame) mutable
 179                                 {
 180                                         auto relative_frame = current_frame - start_frame;
 181                                         auto duration = at_frame - start_frame;
 182                                         auto tweened = static_cast<T>(tween(
 183                                                         static_cast<double>(relative_frame),
 184                                                         *start_value,
 185                                                         destination_value.get() - *start_value,
 186                                                         static_cast<double>(duration)));
 187
 188                                         to_affect.set(tweened);
 189
 190                                         //CASPAR_LOG(info) << relative_frame << L" " << *start_value << L" " << duration << L" " << tweened;
 191                                 };
 192
 193                 store_keyframe(to_affect.identity(), k);
 194         }
 195
 196         template<typename T>
 197         void add_keyframe(binding<T>& to_affect, T set_value, int64_t at_frame)
 198         {
 199                 add_keyframe(to_affect, binding<T>(set_value), at_frame);
 200         }
 201
 202         template<typename T>
 203         void add_keyframe(binding<T>& to_affect, const binding<T>& set_value, int64_t at_frame)
 204         {
 205                 keyframe k(at_frame);
 206
 207                 k.on_destination_frame = [=]() mutable
 208                 {
 209                         to_affect.bind(set_value);
 210                 };
 211
 212                 store_keyframe(to_affect.identity(), k);
 213         }
 214
 215         core::variable& get_variable(const std::wstring& name) override;
 216         const std::vector<std::wstring>& get_variables() const override;
 217 private:
 218         void store_keyframe(void* timeline_identity, const keyframe& k);
 219         void store_variable(
 220                         const std::wstring& name, const std::shared_ptr<core::variable>& var);
 221
 222         struct impl;
 223         std::unique_ptr<impl> impl_;
 224 };
 225
 226 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);
 227
 228 }}}