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 "../frame_producer.h"
  25
  26 #include "../binding.h"
  27
  28 namespace caspar { namespace core { namespace scene {
  29
  30 struct coord
  31 {
  32         binding<double> x;
  33         binding<double> y;
  34 };
  35
  36 struct adjustments
  37 {
  38         binding<double> opacity;
  39
  40         adjustments();
  41 };
  42
  43 struct layer
  44 {
  45         binding<std::wstring> name;
  46         coord position;
  47         adjustments adjustments;
  48         binding<spl::shared_ptr<frame_producer>> producer;
  49         binding<bool> hidden;
  50         binding<bool> is_key;
  51
  52         explicit layer(const spl::shared_ptr<frame_producer>& producer);
  53         layer(const std::wstring& name, const spl::shared_ptr<frame_producer>& producer);
  54 };
  55
  56 struct keyframe
  57 {
  58         std::function<void ()> on_start_animate;
  59         std::function<void (int64_t start_frame, int64_t current_frame)> on_animate_to;
  60         std::function<void ()> on_destination_frame;
  61         int64_t destination_frame;
  62 public:
  63         keyframe(int64_t destination_frame)
  64                 : destination_frame(destination_frame)
  65         {
  66         }
  67 };
  68
  69 template<typename T> class parameter_holder;
  70
  71 class parameter_holder_base
  72 {
  73 public:
  74         virtual ~parameter_holder_base()
  75         {
  76         }
  77
  78         virtual void set(const std::wstring& raw_value) = 0;
  79
  80         template<typename T>
  81         binding<T>& value()
  82         {
  83                 return dynamic_cast<parameter_holder<T>>(*this).value();
  84         }
  85 };
  86
  87 template<typename T>
  88 class parameter_holder : public parameter_holder_base
  89 {
  90         binding<T> value_;
  91 public:
  92         parameter_holder(T initial_value)
  93                 : value_(initial_value)
  94         {
  95         }
  96
  97         binding<T>& value()
  98         {
  99                 return value_;
 100         }
 101
 102         virtual void set(const std::wstring& raw_value)
 103         {
 104                 value_.set(boost::lexical_cast<T>(raw_value));
 105         }
 106 };
 107
 108 class scene_producer : public frame_producer_base
 109 {
 110 public:
 111         scene_producer(int width, int height);
 112         ~scene_producer();
 113
 114         class draw_frame receive_impl() override;
 115         constraints& pixel_constraints() override;
 116         void on_interaction(const interaction_event::ptr& event) override;
 117         bool collides(double x, double y) const override;
 118         std::wstring print() const override;
 119         std::wstring name() const override;
 120         boost::unique_future<std::wstring>      call(const std::vector<std::wstring>& params) override;
 121         boost::property_tree::wptree info() const override;
 122         void subscribe(const monitor::observable::observer_ptr& o) override;
 123         void unsubscribe(const monitor::observable::observer_ptr& o) override;
 124         layer& create_layer(
 125                         const spl::shared_ptr<frame_producer>& producer, int x, int y);
 126         layer& create_layer(
 127                         const spl::shared_ptr<frame_producer>& producer, int x, int y, const std::wstring& name);
 128         layer& create_layer(const spl::shared_ptr<frame_producer>& producer);
 129         binding<int64_t> frame();
 130
 131         template<typename T> binding<T>& create_parameter(const std::wstring& name, T initial_value = T())
 132         {
 133                 auto param = std::make_shared<parameter_holder<T>>(initial_value);
 134
 135                 store_parameter(name, param);
 136
 137                 return param->value();
 138         }
 139
 140         template<typename T>
 141         void add_keyframe(
 142                         binding<T>& to_affect,
 143                         T destination_value,
 144                         int64_t at_frame,
 145                         const std::wstring& easing)
 146         {
 147                 add_keyframe(to_affect, binding<T>(destination_value), at_frame, easing);
 148         }
 149
 150         template<typename T>
 151         void add_keyframe(
 152                         binding<T>& to_affect,
 153                         const binding<T>& destination_value,
 154                         int64_t at_frame,
 155                         const std::wstring& easing)
 156         {
 157                 tweener tween(easing);
 158                 keyframe k(at_frame);
 159
 160                 std::shared_ptr<T> start_value(new T);
 161
 162                 k.on_start_animate = [=]() mutable
 163                 {
 164                         *start_value = to_affect.get();
 165                         to_affect.unbind();
 166                 };
 167
 168                 k.on_destination_frame = [=]() mutable
 169                 {
 170                         to_affect.bind(destination_value);
 171                 };
 172
 173                 k.on_animate_to =
 174                                 [=](int64_t start_frame, int64_t current_frame) mutable
 175                                 {
 176                                         auto relative_frame = current_frame - start_frame;
 177                                         auto duration = at_frame - start_frame;
 178                                         auto tweened = static_cast<T>(tween(
 179                                                         static_cast<double>(relative_frame),
 180                                                         *start_value,
 181                                                         destination_value.get() - *start_value,
 182                                                         static_cast<double>(duration)));
 183
 184                                         to_affect.set(tweened);
 185
 186                                         CASPAR_LOG(info) << relative_frame << L" " << *start_value << L" " << duration << L" " << tweened;
 187                                 };
 188
 189                 store_keyframe(to_affect.identity(), k);
 190         }
 191
 192         template<typename T>
 193         void add_keyframe(binding<T>& to_affect, T set_value, int64_t at_frame)
 194         {
 195                 add_keyframe(to_affect, binding<T>(set_value), at_frame);
 196         }
 197
 198         template<typename T>
 199         void add_keyframe(binding<T>& to_affect, const binding<T>& set_value, int64_t at_frame)
 200         {
 201                 keyframe k(at_frame);
 202
 203                 k.on_destination_frame = [=]() mutable
 204                 {
 205                         to_affect.bind(set_value);
 206                 };
 207
 208                 store_keyframe(to_affect.identity(), k);
 209         }
 210 private:
 211         void store_parameter(
 212                         const std::wstring& name,
 213                         const std::shared_ptr<parameter_holder_base>& param);
 214         void store_keyframe(void* timeline_identity, const keyframe& k);
 215
 216         struct impl;
 217         std::unique_ptr<impl> impl_;
 218 };
 219
 220 spl::shared_ptr<frame_producer> create_dummy_scene_producer(const spl::shared_ptr<class frame_factory>& frame_factory, const video_format_desc& format_desc, const std::vector<std::wstring>& params);
 221
 222 }}}