]> git.sesse.net Git - casparcg/blob - core/producer/layer.cpp
Draft of interaction with producers and scene_producer
[casparcg] / core / producer / layer.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: Robert Nagy, ronag89@gmail.com
20 */
21
22 #include "../stdafx.h"
23
24 #include "layer.h"
25
26 #include "frame_producer.h"
27
28 #include "../video_format.h"
29 #include "../frame/draw_frame.h"
30 #include "../frame/frame_transform.h"
31
32 #include <boost/optional.hpp>
33 #include <boost/thread/future.hpp>
34
35 namespace caspar { namespace core {
36
37 struct layer::impl
38 {                               
39         monitor::basic_subject                          event_subject_;
40         monitor::basic_subject                          foreground_event_subject_;
41         monitor::basic_subject                          background_event_subject_;
42         spl::shared_ptr<frame_producer>         foreground_;
43         spl::shared_ptr<frame_producer>         background_;
44         boost::optional<int32_t>                        auto_play_delta_;
45
46 public:
47         impl(int index) 
48                 : event_subject_(monitor::path("layer") % index)
49                 , foreground_event_subject_("")
50                 , background_event_subject_("background")
51                 , foreground_(frame_producer::empty())
52                 , background_(frame_producer::empty())
53         {
54                 foreground_event_subject_.subscribe(event_subject_);
55                 background_event_subject_.subscribe(event_subject_);
56         }
57
58         void pause()
59         {
60                 foreground_->paused(true);
61         }
62         
63         void load(spl::shared_ptr<frame_producer> producer, bool preview, const boost::optional<int32_t>& auto_play_delta)
64         {               
65                 background_->unsubscribe(background_event_subject_);
66                 background_ = std::move(producer);
67                 background_->subscribe(background_event_subject_);
68
69                 auto_play_delta_ = auto_play_delta;
70
71                 if(preview)
72                 {
73                         play();
74                         foreground_->paused(true);
75                 }
76
77                 if(auto_play_delta_ && foreground_ == frame_producer::empty())
78                         play();
79         }
80         
81         void play()
82         {                       
83                 if(background_ != frame_producer::empty())
84                 {
85                         background_->leading_producer(foreground_);
86
87                         background_->unsubscribe(background_event_subject_);
88                         foreground_->unsubscribe(foreground_event_subject_);
89
90                         foreground_ = std::move(background_);
91                         background_ = std::move(frame_producer::empty());
92                         
93                         foreground_->subscribe(foreground_event_subject_);
94
95                         auto_play_delta_.reset();
96                 }
97
98                 foreground_->paused(false);
99         }
100         
101         void stop()
102         {
103                 foreground_->unsubscribe(foreground_event_subject_);
104
105                 foreground_ = std::move(frame_producer::empty());
106
107                 auto_play_delta_.reset();
108         }
109                 
110         draw_frame receive(const video_format_desc& format_desc)
111         {               
112                 try
113                 {               
114                         auto frame = foreground_->receive();
115                         
116                         if(frame == core::draw_frame::late())
117                                 return foreground_->last_frame();
118                                                 
119                         if(auto_play_delta_)
120                         {
121                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - foreground_->frame_number() - static_cast<int64_t>(*auto_play_delta_);
122                                 if(frames_left < 1)
123                                 {
124                                         play();
125                                         return receive(format_desc);
126                                 }
127                         }
128
129                         event_subject_  << monitor::event("time")       % monitor::duration(foreground_->frame_number()/format_desc.fps)
130                                                                                                                 % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)
131                                                         << monitor::event("frame")      % static_cast<int64_t>(foreground_->frame_number())
132                                                                                                                 % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));
133
134                         foreground_event_subject_ << monitor::event("type") % foreground_->name();
135                         background_event_subject_ << monitor::event("type") % background_->name();
136                                 
137                         return frame;
138                 }
139                 catch(...)
140                 {
141                         CASPAR_LOG_CURRENT_EXCEPTION();
142                         stop();
143                         return core::draw_frame::empty();
144                 }
145         }
146         
147         boost::property_tree::wptree info() const
148         {
149                 boost::property_tree::wptree info;
150                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));
151                 info.add(L"frame-number", foreground_->frame_number());
152
153                 auto nb_frames = foreground_->nb_frames();
154
155                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);
156                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - foreground_->frame_number() - (auto_play_delta_ ? *auto_play_delta_ : 0)));
157                 info.add_child(L"producer", foreground_->info());
158                 info.add_child(L"background.producer", background_->info());
159                 return info;
160         }
161
162         void on_interaction(const interaction_event::ptr& event)
163         {
164                 foreground_->on_interaction(event);
165         }
166         
167         bool collides(double x, double y) const
168         {
169                 return foreground_->collides(x, y);
170         }
171 };
172
173 layer::layer(int index) : impl_(new impl(index)){}
174 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}
175 layer& layer::operator=(layer&& other)
176 {
177         other.swap(*this);
178         return *this;
179 }
180 void layer::swap(layer& other)
181 {       
182         impl_.swap(other.impl_);
183 }
184 void layer::load(spl::shared_ptr<frame_producer> frame_producer, bool preview, const boost::optional<int32_t>& auto_play_delta){return impl_->load(std::move(frame_producer), preview, auto_play_delta);}       
185 void layer::play(){impl_->play();}
186 void layer::pause(){impl_->pause();}
187 void layer::stop(){impl_->stop();}
188 draw_frame layer::receive(const video_format_desc& format_desc) {return impl_->receive(format_desc);}
189 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}
190 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}
191 boost::property_tree::wptree layer::info() const{return impl_->info();}
192 void layer::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}
193 void layer::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}
194 void layer::on_interaction(const interaction_event::ptr& event) { impl_->on_interaction(event); }
195 bool layer::collides(double x, double y) const { return impl_->collides(x, y); }
196 }}