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2.1.0: Integrating monitoring.
[casparcg] / core / producer / layer.cpp
1 /*\r
2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
3 *\r
4 * This file is part of CasparCG (www.casparcg.com).\r
5 *\r
6 * CasparCG is free software: you can redistribute it and/or modify\r
7 * it under the terms of the GNU General Public License as published by\r
8 * the Free Software Foundation, either version 3 of the License, or\r
9 * (at your option) any later version.\r
10 *\r
11 * CasparCG is distributed in the hope that it will be useful,\r
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
14 * GNU General Public License for more details.\r
15 *\r
16 * You should have received a copy of the GNU General Public License\r
17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
18 *\r
19 * Author: Robert Nagy, ronag89@gmail.com\r
20 */\r
21 \r
22 #include "../stdafx.h"\r
23 \r
24 #include "layer.h"\r
25 \r
26 #include "frame_producer.h"\r
27 \r
28 #include "../video_format.h"\r
29 #include "../frame/draw_frame.h"\r
30 #include "../frame/frame_transform.h"\r
31 \r
32 #include <boost/optional.hpp>\r
33 #include <boost/thread/future.hpp>\r
34 \r
35 namespace caspar { namespace core {\r
36 \r
37 struct layer::impl\r
38 {                               \r
39         spl::shared_ptr<monitor::subject>       event_subject_;\r
40         spl::shared_ptr<monitor::subject>       foreground_event_subject_;\r
41         spl::shared_ptr<monitor::subject>       background_event_subject_;\r
42         spl::shared_ptr<frame_producer>         foreground_;\r
43         spl::shared_ptr<frame_producer>         background_;\r
44         int64_t                                                         frame_number_;\r
45         boost::optional<int32_t>                        auto_play_delta_;\r
46         bool                                                            is_paused_;\r
47 \r
48 public:\r
49         impl(int index) \r
50                 : event_subject_(new monitor::subject(monitor::path("layer") % index))\r
51                 , foreground_event_subject_(new monitor::subject("foreground"))\r
52                 , background_event_subject_(new monitor::subject("background"))\r
53                 , foreground_(frame_producer::empty())\r
54                 , background_(frame_producer::empty())\r
55                 , frame_number_(0)\r
56                 , is_paused_(false)\r
57         {\r
58                 foreground_event_subject_->subscribe(event_subject_);\r
59                 background_event_subject_->subscribe(event_subject_);\r
60         }\r
61 \r
62         void pause()\r
63         {\r
64                 is_paused_ = true;\r
65         }\r
66 \r
67         void resume()\r
68         {\r
69                 is_paused_ = false;\r
70         }\r
71 \r
72         void load(spl::shared_ptr<frame_producer> producer, const boost::optional<int32_t>& auto_play_delta)\r
73         {               \r
74                 background_->unsubscribe(background_event_subject_);\r
75                 background_ = std::move(producer);\r
76                 background_->subscribe(background_event_subject_);\r
77 \r
78                 auto_play_delta_ = auto_play_delta;\r
79 \r
80                 if(auto_play_delta_ && foreground_ == frame_producer::empty())\r
81                         play();\r
82         }\r
83         \r
84         void play()\r
85         {                       \r
86                 if(background_ != frame_producer::empty())\r
87                 {\r
88                         background_->set_leading_producer(foreground_);\r
89 \r
90                         background_->unsubscribe(background_event_subject_);\r
91                         foreground_->unsubscribe(foreground_event_subject_);\r
92 \r
93                         foreground_ = std::move(background_);\r
94                         background_ = std::move(frame_producer::empty());\r
95                         \r
96                         foreground_->subscribe(foreground_event_subject_);\r
97 \r
98                         frame_number_   = 0;\r
99                         auto_play_delta_.reset();\r
100                 }\r
101 \r
102                 resume();\r
103         }\r
104         \r
105         void stop()\r
106         {\r
107                 foreground_->unsubscribe(foreground_event_subject_);\r
108 \r
109                 foreground_ = std::move(frame_producer::empty());\r
110 \r
111                 frame_number_   = 0;\r
112                 auto_play_delta_.reset();\r
113 \r
114                 pause();\r
115         }\r
116                 \r
117         spl::shared_ptr<draw_frame> receive(frame_producer::flags flags, const video_format_desc& format_desc)\r
118         {               \r
119                 try\r
120                 {\r
121                         if(is_paused_)\r
122                                 return draw_frame::mute(foreground_->last_frame());\r
123                 \r
124                         auto frame = foreground_->receive(flags.value());\r
125                         if(frame == core::draw_frame::late())\r
126                                 return foreground_->last_frame();\r
127                         \r
128                         ++frame_number_;\r
129 \r
130                         if(auto_play_delta_)\r
131                         {\r
132                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - frame_number_ - static_cast<int64_t>(*auto_play_delta_);\r
133                                 if(frames_left < 1)\r
134                                 {\r
135                                         play();\r
136                                         return receive(flags, format_desc);\r
137                                 }\r
138                         }\r
139 \r
140                         *event_subject_ << monitor::event("state")      % u8(is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"))                                                       \r
141                                                         << monitor::event("time")       % monitor::duration(frame_number_/format_desc.fps)\r
142                                                                                                                 % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)\r
143                                                         << monitor::event("frame")      % static_cast<int64_t>(frame_number_)\r
144                                                                                                                 % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));\r
145 \r
146                         *foreground_event_subject_ << monitor::event("type") % u8(foreground_->name());\r
147                         *background_event_subject_ << monitor::event("type") % u8(foreground_->name());\r
148                                 \r
149                         return frame;\r
150                 }\r
151                 catch(...)\r
152                 {\r
153                         CASPAR_LOG_CURRENT_EXCEPTION();\r
154                         stop();\r
155                         return core::draw_frame::empty();\r
156                 }\r
157         }\r
158         \r
159         boost::property_tree::wptree info() const\r
160         {\r
161                 boost::property_tree::wptree info;\r
162                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
163                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));\r
164                 info.add(L"frame-number", frame_number_);\r
165 \r
166                 auto nb_frames = foreground_->nb_frames();\r
167 \r
168                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
169                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - (auto_play_delta_ ? *auto_play_delta_ : 0)));\r
170                 info.add_child(L"foreground.producer", foreground_->info());\r
171                 info.add_child(L"background.producer", background_->info());\r
172                 return info;\r
173         }\r
174 };\r
175 \r
176 layer::layer(int index) : impl_(new impl(index)){}\r
177 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
178 layer& layer::operator=(layer&& other)\r
179 {\r
180         other.swap(*this);\r
181         return *this;\r
182 }\r
183 void layer::swap(layer& other)\r
184 {       \r
185         impl_.swap(other.impl_);\r
186 }\r
187 void layer::load(spl::shared_ptr<frame_producer> frame_producer, const boost::optional<int32_t>& auto_play_delta){return impl_->load(std::move(frame_producer), auto_play_delta);}      \r
188 void layer::play(){impl_->play();}\r
189 void layer::pause(){impl_->pause();}\r
190 void layer::stop(){impl_->stop();}\r
191 spl::shared_ptr<draw_frame> layer::receive(frame_producer::flags flags, const video_format_desc& format_desc) {return impl_->receive(flags, format_desc);}\r
192 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
193 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
194 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
195 void layer::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_->subscribe(o);}\r
196 void layer::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_->unsubscribe(o);}\r
197 }}