]> git.sesse.net Git - casparcg/blob - core/producer/layer.cpp
2.1.0: Restructured "frame" folder.
[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 "../frame/draw_frame.h"\r
29 #include "../frame/frame_transform.h"\r
30 \r
31 #include <boost/optional.hpp>\r
32 #include <boost/thread/future.hpp>\r
33 \r
34 namespace caspar { namespace core {\r
35 \r
36 struct layer::impl\r
37 {                               \r
38         safe_ptr<frame_producer>        foreground_;\r
39         safe_ptr<frame_producer>        background_;\r
40         int64_t                                         frame_number_;\r
41         boost::optional<int32_t>        auto_play_delta_;\r
42         bool                                            is_paused_;\r
43 \r
44 public:\r
45         impl() \r
46                 : foreground_(frame_producer::empty())\r
47                 , background_(frame_producer::empty())\r
48                 , frame_number_(0)\r
49                 , is_paused_(false)\r
50         {\r
51         }\r
52         \r
53         void pause()\r
54         {\r
55                 is_paused_ = true;\r
56         }\r
57 \r
58         void resume()\r
59         {\r
60                 is_paused_ = false;\r
61         }\r
62 \r
63         void load(const safe_ptr<frame_producer>& producer, bool preview, const boost::optional<int32_t>& auto_play_delta)\r
64         {               \r
65                 background_              = producer;\r
66                 auto_play_delta_ = auto_play_delta;\r
67 \r
68                 if(auto_play_delta_ && foreground_ == frame_producer::empty())\r
69                         play();\r
70 \r
71                 if(preview) // Play the first frame and pause.\r
72                 {                       \r
73                         play();\r
74                         receive(frame_producer::flags::none);\r
75                         pause();\r
76                 }\r
77         }\r
78         \r
79         void play()\r
80         {                       \r
81                 if(background_ != frame_producer::empty())\r
82                 {\r
83                         background_->set_leading_producer(foreground_);\r
84                         \r
85                         foreground_                     = background_;\r
86                         background_                     = frame_producer::empty();\r
87                         frame_number_           = 0;\r
88                         auto_play_delta_.reset();\r
89                 }\r
90 \r
91                 is_paused_                      = false;\r
92         }\r
93         \r
94         void stop()\r
95         {\r
96                 foreground_                     = frame_producer::empty();\r
97                 background_                     = background_;\r
98                 frame_number_           = 0;\r
99                 auto_play_delta_.reset();\r
100 \r
101                 is_paused_                      = true;\r
102         }\r
103                 \r
104         safe_ptr<draw_frame> receive(int flags)\r
105         {               \r
106                 try\r
107                 {\r
108                         if(is_paused_)\r
109                                 return disable_audio(foreground_->last_frame());\r
110                 \r
111                         auto frame = receive_and_follow(foreground_, flags);\r
112                         if(frame == core::draw_frame::late())\r
113                                 return disable_audio(foreground_->last_frame());\r
114 \r
115                         if(auto_play_delta_)\r
116                         {\r
117                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(*auto_play_delta_);\r
118                                 if(frames_left < 1)\r
119                                 {\r
120                                         play();\r
121                                         return receive(flags);\r
122                                 }\r
123                         }\r
124                                 \r
125                         return frame;\r
126                 }\r
127                 catch(...)\r
128                 {\r
129                         CASPAR_LOG_CURRENT_EXCEPTION();\r
130                         stop();\r
131                         return core::draw_frame::empty();\r
132                 }\r
133         }\r
134 \r
135         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
136         {\r
137                 return (foreground ? foreground_ : background_)->call(param);\r
138         }\r
139 \r
140         bool empty() const\r
141         {\r
142                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
143         }\r
144 \r
145         boost::property_tree::wptree info() const\r
146         {\r
147                 boost::property_tree::wptree info;\r
148                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
149                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));\r
150                 info.add(L"frame-number", frame_number_);\r
151 \r
152                 auto nb_frames = foreground_->nb_frames();\r
153 \r
154                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
155                 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
156                 info.add_child(L"foreground.producer", foreground_->info());\r
157                 info.add_child(L"background.producer", background_->info());\r
158                 return info;\r
159         }\r
160 };\r
161 \r
162 layer::layer() : impl_(new impl()){}\r
163 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
164 layer& layer::operator=(layer&& other)\r
165 {\r
166         impl_ = std::move(other.impl_);\r
167         return *this;\r
168 }\r
169 layer::layer(const layer& other) : impl_(new impl(*other.impl_)){}\r
170 layer& layer::operator=(const layer& other)\r
171 {\r
172         layer temp(other);\r
173         temp.swap(*this);\r
174         return *this;\r
175 }\r
176 void layer::swap(layer& other)\r
177 {       \r
178         impl_.swap(other.impl_);\r
179 }\r
180 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview, const boost::optional<int32_t>& auto_play_delta){return impl_->load(frame_producer, preview, auto_play_delta);}  \r
181 void layer::play(){impl_->play();}\r
182 void layer::pause(){impl_->pause();}\r
183 void layer::stop(){impl_->stop();}\r
184 bool layer::is_paused() const{return impl_->is_paused_;}\r
185 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
186 safe_ptr<draw_frame> layer::receive(int flags) {return impl_->receive(flags);}\r
187 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
188 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
189 bool layer::empty() const {return impl_->empty();}\r
190 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
191 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
192 }}