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2.1.0: Reverted utf8. To complicated to fully fix for now.
[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 #include "frame/basic_frame.h"\r
28 \r
29 #include <boost/property_tree/ptree.hpp>\r
30 \r
31 namespace caspar { namespace core {\r
32         \r
33 struct layer::implementation\r
34 {                               \r
35         safe_ptr<frame_producer>        foreground_;\r
36         safe_ptr<frame_producer>        background_;\r
37         int64_t                                         frame_number_;\r
38         int32_t                                         auto_play_delta_;\r
39         bool                                            is_paused_;\r
40 \r
41 public:\r
42         implementation() \r
43                 : foreground_(frame_producer::empty())\r
44                 , background_(frame_producer::empty())\r
45                 , frame_number_(0)\r
46                 , auto_play_delta_(-1)\r
47                 , is_paused_(false)\r
48         {\r
49         }\r
50         \r
51         void pause()\r
52         {\r
53                 is_paused_ = true;\r
54         }\r
55 \r
56         void resume()\r
57         {\r
58                 is_paused_ = false;\r
59         }\r
60 \r
61         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
62         {               \r
63                 background_              = producer;\r
64                 auto_play_delta_ = auto_play_delta;\r
65 \r
66                 if(auto_play_delta_ > -1 && foreground_ == frame_producer::empty())\r
67                         play();\r
68 \r
69                 if(preview) // Play the first frame and pause.\r
70                 {                       \r
71                         play();\r
72                         receive(frame_producer::NO_HINT);\r
73                         pause();\r
74                 }\r
75         }\r
76         \r
77         void play()\r
78         {                       \r
79                 if(background_ != frame_producer::empty())\r
80                 {\r
81                         background_->set_leading_producer(foreground_);\r
82                         \r
83                         foreground_                     = background_;\r
84                         background_                     = frame_producer::empty();\r
85                         frame_number_           = 0;\r
86                         auto_play_delta_        = -1;   \r
87                 }\r
88 \r
89                 is_paused_                      = false;\r
90         }\r
91         \r
92         void stop()\r
93         {\r
94                 foreground_                     = frame_producer::empty();\r
95                 background_                     = background_;\r
96                 frame_number_           = 0;\r
97                 auto_play_delta_        = -1;\r
98 \r
99                 is_paused_                      = true;\r
100         }\r
101                 \r
102         safe_ptr<basic_frame> receive(int hints)\r
103         {               \r
104                 try\r
105                 {\r
106                         if(is_paused_)\r
107                                 return disable_audio(foreground_->last_frame());\r
108                 \r
109                         auto frame = receive_and_follow(foreground_, hints);\r
110                         if(frame == core::basic_frame::late())\r
111                                 return foreground_->last_frame();\r
112 \r
113                         auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);\r
114                         if(auto_play_delta_ > -1 && frames_left < 1)\r
115                         {\r
116                                 play();\r
117                                 return receive(hints);\r
118                         }\r
119                                 \r
120                         return frame;\r
121                 }\r
122                 catch(...)\r
123                 {\r
124                         CASPAR_LOG_CURRENT_EXCEPTION();\r
125                         stop();\r
126                         return core::basic_frame::empty();\r
127                 }\r
128         }\r
129 \r
130         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
131         {\r
132                 return (foreground ? foreground_ : background_)->call(param);\r
133         }\r
134 \r
135         bool empty() const\r
136         {\r
137                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
138         }\r
139 \r
140         boost::property_tree::wptree info() const\r
141         {\r
142                 boost::property_tree::wptree info;\r
143                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
144                 info.add(L"auto_delta", auto_play_delta_);\r
145                 info.add(L"frame-number", frame_number_);\r
146 \r
147                 auto nb_frames = foreground_->nb_frames();\r
148 \r
149                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
150                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));\r
151                 info.add_child(L"foreground", foreground_->info());\r
152                 info.add_child(L"background", background_->info());\r
153                 return info;\r
154         }\r
155 };\r
156 \r
157 layer::layer() : impl_(new implementation()){}\r
158 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
159 layer& layer::operator=(layer&& other)\r
160 {\r
161         impl_ = std::move(other.impl_);\r
162         return *this;\r
163 }\r
164 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
165 layer& layer::operator=(const layer& other)\r
166 {\r
167         layer temp(other);\r
168         temp.swap(*this);\r
169         return *this;\r
170 }\r
171 void layer::swap(layer& other)\r
172 {       \r
173         impl_.swap(other.impl_);\r
174 }\r
175 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview, int auto_play_delta){return impl_->load(frame_producer, preview, auto_play_delta);}      \r
176 void layer::play(){impl_->play();}\r
177 void layer::pause(){impl_->pause();}\r
178 void layer::stop(){impl_->stop();}\r
179 bool layer::is_paused() const{return impl_->is_paused_;}\r
180 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
181 safe_ptr<basic_frame> layer::receive(int hints) {return impl_->receive(hints);}\r
182 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
183 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
184 bool layer::empty() const {return impl_->empty();}\r
185 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
186 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
187 }}