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 \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         monitor::basic_subject                          event_subject_;\r
  40         monitor::basic_subject                          foreground_event_subject_;\r
  41         monitor::basic_subject                          background_event_subject_;\r
  42         spl::shared_ptr<frame_producer>         foreground_;\r
  43         spl::shared_ptr<frame_producer>         background_;\r
  44         boost::optional<int32_t>                        auto_play_delta_;\r
  45 \r
  46 public:\r
  47         impl(int index) \r
  48                 : event_subject_(monitor::path("layer") % index)\r
  49                 , foreground_event_subject_("")\r
  50                 , background_event_subject_("background")\r
  51                 , foreground_(frame_producer::empty())\r
  52                 , background_(frame_producer::empty())\r
  53         {\r
  54                 foreground_event_subject_.subscribe(event_subject_);\r
  55                 background_event_subject_.subscribe(event_subject_);\r
  56         }\r
  57 \r
  58         void pause()\r
  59         {\r
  60                 foreground_->paused(true);\r
  61         }\r
  62         \r
  63         void load(spl::shared_ptr<frame_producer> producer, bool preview, const boost::optional<int32_t>& auto_play_delta)\r
  64         {               \r
  65                 background_->unsubscribe(background_event_subject_);\r
  66                 background_ = std::move(producer);\r
  67                 background_->subscribe(background_event_subject_);\r
  68 \r
  69                 auto_play_delta_ = auto_play_delta;\r
  70 \r
  71                 if(preview)\r
  72                 {\r
  73                         play();\r
  74                         foreground_->receive();\r
  75                         foreground_->paused(true);\r
  76                 }\r
  77 \r
  78                 if(auto_play_delta_ && foreground_ == frame_producer::empty())\r
  79                         play();\r
  80         }\r
  81         \r
  82         void play()\r
  83         {                       \r
  84                 if(background_ != frame_producer::empty())\r
  85                 {\r
  86                         background_->leading_producer(foreground_);\r
  87 \r
  88                         background_->unsubscribe(background_event_subject_);\r
  89                         foreground_->unsubscribe(foreground_event_subject_);\r
  90 \r
  91                         foreground_ = std::move(background_);\r
  92                         background_ = std::move(frame_producer::empty());\r
  93                         \r
  94                         foreground_->subscribe(foreground_event_subject_);\r
  95 \r
  96                         auto_play_delta_.reset();\r
  97                 }\r
  98 \r
  99                 foreground_->paused(false);\r
 100         }\r
 101         \r
 102         void stop()\r
 103         {\r
 104                 foreground_->unsubscribe(foreground_event_subject_);\r
 105 \r
 106                 foreground_ = std::move(frame_producer::empty());\r
 107 \r
 108                 auto_play_delta_.reset();\r
 109         }\r
 110                 \r
 111         draw_frame receive(const video_format_desc& format_desc)\r
 112         {               \r
 113                 try\r
 114                 {               \r
 115                         auto frame = foreground_->receive();\r
 116 \r
 117                         if(frame == core::draw_frame::late())\r
 118                                 return foreground_->last_frame();\r
 119                                                 \r
 120                         if(auto_play_delta_)\r
 121                         {\r
 122                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - foreground_->frame_number() - static_cast<int64_t>(*auto_play_delta_);\r
 123                                 if(frames_left < 1)\r
 124                                 {\r
 125                                         play();\r
 126                                         return receive(format_desc);\r
 127                                 }\r
 128                         }\r
 129 \r
 130                         event_subject_  << monitor::event("time")       % monitor::duration(foreground_->frame_number()/format_desc.fps)\r
 131                                                                                                                 % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)\r
 132                                                         << monitor::event("frame")      % static_cast<int64_t>(foreground_->frame_number())\r
 133                                                                                                                 % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));\r
 134 \r
 135                         foreground_event_subject_ << monitor::event("type") % foreground_->name();\r
 136                         background_event_subject_ << monitor::event("type") % background_->name();\r
 137                                 \r
 138                         return frame;\r
 139                 }\r
 140                 catch(...)\r
 141                 {\r
 142                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 143                         stop();\r
 144                         return core::draw_frame::empty();\r
 145                 }\r
 146         }\r
 147         \r
 148         boost::property_tree::wptree info() const\r
 149         {\r
 150                 boost::property_tree::wptree info;\r
 151                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));\r
 152                 info.add(L"frame-number", foreground_->frame_number());\r
 153 \r
 154                 auto nb_frames = foreground_->nb_frames();\r
 155 \r
 156                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 157                 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)));\r
 158                 info.add_child(L"producer", foreground_->info());\r
 159                 info.add_child(L"background.producer", background_->info());\r
 160                 return info;\r
 161         }\r
 162 };\r
 163 \r
 164 layer::layer(int index) : impl_(new impl(index)){}\r
 165 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 166 layer& layer::operator=(layer&& other)\r
 167 {\r
 168         other.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(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);}       \r
 176 void layer::play(){impl_->play();}\r
 177 void layer::pause(){impl_->pause();}\r
 178 void layer::stop(){impl_->stop();}\r
 179 draw_frame layer::receive(const video_format_desc& format_desc) {return impl_->receive(format_desc);}\r
 180 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 181 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 182 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 183 void layer::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}\r
 184 void layer::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}\r
 185 }}