git.sesse.net Git - casparcg/blob - 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         monitor::subject                        monitor_subject_;\r
  41 \r
  42 public:\r
  43         implementation(int index) \r
  44                 : foreground_(frame_producer::empty())\r
  45                 , background_(frame_producer::empty())\r
  46                 , frame_number_(0)\r
  47                 , auto_play_delta_(-1)\r
  48                 , is_paused_(false)\r
  49                 , monitor_subject_("/layer/" + boost::lexical_cast<std::string>(index))\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, int 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_ > -1 && 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::NO_HINT);\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                         set_foreground(background_);\r
  86 \r
  87                         background_                     = frame_producer::empty();\r
  88                         frame_number_           = 0;\r
  89                         auto_play_delta_        = -1;   \r
  90                 }\r
  91 \r
  92                 is_paused_                      = false;\r
  93         }\r
  94         \r
  95         void stop()\r
  96         {\r
  97                 set_foreground(frame_producer::empty());\r
  98 \r
  99                 background_                     = background_;\r
 100                 frame_number_           = 0;\r
 101                 auto_play_delta_        = -1;\r
 102 \r
 103                 is_paused_                      = true;\r
 104         }\r
 105                 \r
 106         safe_ptr<basic_frame> receive(int hints)\r
 107         {               \r
 108                 try\r
 109                 {\r
 110                         if(is_paused_)\r
 111                         {\r
 112                                 if(foreground_->last_frame() == basic_frame::empty())\r
 113                                         foreground_->receive(frame_producer::NO_HINT);\r
 114 \r
 115                                 return disable_audio(foreground_->last_frame());\r
 116                         }\r
 117 \r
 118                         auto foreground = foreground_;\r
 119 \r
 120                         auto frame = receive_and_follow(foreground, hints);\r
 121 \r
 122                         if(foreground != foreground_)\r
 123                                 set_foreground(foreground);\r
 124 \r
 125                         if(frame == core::basic_frame::late())\r
 126                                 return foreground_->last_frame();\r
 127 \r
 128                         auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(++frame_number_) - static_cast<int64_t>(auto_play_delta_);\r
 129                         if(auto_play_delta_ > -1 && frames_left < 1)\r
 130                         {\r
 131                                 play();\r
 132                                 return receive(hints);\r
 133                         }\r
 134                                 \r
 135                         return frame;\r
 136                 }\r
 137                 catch(...)\r
 138                 {\r
 139                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 140                         stop();\r
 141                         return core::basic_frame::empty();\r
 142                 }\r
 143         }\r
 144 \r
 145         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
 146         {\r
 147                 return (foreground ? foreground_ : background_)->call(param);\r
 148         }\r
 149 \r
 150         bool empty() const\r
 151         {\r
 152                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 153         }\r
 154 \r
 155         boost::property_tree::wptree info() const\r
 156         {\r
 157                 boost::property_tree::wptree info;\r
 158                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 159                 info.add(L"auto_delta", auto_play_delta_);\r
 160                 info.add(L"frame-number", frame_number_);\r
 161 \r
 162                 auto nb_frames = foreground_->nb_frames();\r
 163 \r
 164                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 165                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));\r
 166                 info.add_child(L"foreground.producer", foreground_->info());\r
 167                 info.add_child(L"background.producer", background_->info());\r
 168                 return info;\r
 169         }\r
 170 \r
 171         void set_foreground(safe_ptr<core::frame_producer> producer)\r
 172         {\r
 173                 foreground_->monitor_output().unlink_target(&monitor_subject_);\r
 174                 foreground_                     = producer;\r
 175                 foreground_->monitor_output().link_target(&monitor_subject_);\r
 176         }\r
 177 };\r
 178 \r
 179 layer::layer(int index) : impl_(new implementation(index)){}\r
 180 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 181 layer& layer::operator=(layer&& other)\r
 182 {\r
 183         impl_ = std::move(other.impl_);\r
 184         return *this;\r
 185 }\r
 186 void layer::swap(layer& other)\r
 187 {       \r
 188         impl_.swap(other.impl_);\r
 189 }\r
 190 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
 191 void layer::play(){impl_->play();}\r
 192 void layer::pause(){impl_->pause();}\r
 193 void layer::stop(){impl_->stop();}\r
 194 bool layer::is_paused() const{return impl_->is_paused_;}\r
 195 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
 196 safe_ptr<basic_frame> layer::receive(int hints) {return impl_->receive(hints);}\r
 197 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 198 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 199 bool layer::empty() const {return impl_->empty();}\r
 200 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
 201 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 202 monitor::source& layer::monitor_output(){return impl_->monitor_subject_;}\r
 203 }}