git.sesse.net Git - casparcg/blob - core/producer/separated/separated_producer.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 "separated_producer.h"\r
  25 \r
  26 #include <core/producer/frame_producer.h>\r
  27 #include <core/frame/draw_frame.h>\r
  28 #include <core/monitor/monitor.h>\r
  29 \r
  30 #include <tbb/parallel_invoke.h>\r
  31 \r
  32 namespace caspar { namespace core {     \r
  33 \r
  34 class separated_producer : public frame_producer\r
  35 {               \r
  36         monitor::basic_subject                  event_subject_;\r
  37         monitor::basic_subject                  key_event_subject_;\r
  38 \r
  39         spl::shared_ptr<frame_producer> fill_producer_;\r
  40         spl::shared_ptr<frame_producer> key_producer_;\r
  41         draw_frame                                              fill_;\r
  42         draw_frame                                              key_;\r
  43         draw_frame                                              last_frame_;\r
  44                         \r
  45 public:\r
  46         explicit separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key) \r
  47                 : key_event_subject_("keyer")           \r
  48                 , fill_producer_(fill)\r
  49                 , key_producer_(key)\r
  50                 , fill_(core::draw_frame::late())\r
  51                 , key_(core::draw_frame::late())\r
  52                 , last_frame_(core::draw_frame::empty())\r
  53         {\r
  54                 CASPAR_LOG(info) << print() << L" Initialized";\r
  55 \r
  56                 key_event_subject_.subscribe(event_subject_);\r
  57 \r
  58                 key_producer_->subscribe(key_event_subject_);\r
  59                 fill_producer_->subscribe(event_subject_);\r
  60         }\r
  61 \r
  62         // frame_producer\r
  63         \r
  64         draw_frame receive() override\r
  65         {\r
  66                 tbb::parallel_invoke(\r
  67                 [&]\r
  68                 {\r
  69                         if(fill_ == core::draw_frame::late())\r
  70                                 fill_ = fill_producer_->receive();\r
  71                 },\r
  72                 [&]\r
  73                 {\r
  74                         if(key_ == core::draw_frame::late())\r
  75                                 key_ = key_producer_->receive();\r
  76                 });\r
  77 \r
  78                 if(fill_ == draw_frame::eof() || key_ == draw_frame::eof())\r
  79                         return draw_frame::eof();\r
  80 \r
  81                 if(fill_ == core::draw_frame::late() || key_ == core::draw_frame::late()) // One of the producers is lagging, keep them in sync.\r
  82                         return core::draw_frame::late();\r
  83                 \r
  84                 auto frame = draw_frame::mask(fill_, key_);\r
  85 \r
  86                 fill_ = draw_frame::late();\r
  87                 key_  = draw_frame::late();\r
  88                 \r
  89                 if(frame != core::draw_frame::late())\r
  90                         last_frame_ = frame;\r
  91 \r
  92                 return frame;\r
  93         }\r
  94 \r
  95         draw_frame last_frame() const override\r
  96         {\r
  97                 return draw_frame::still(last_frame_);\r
  98         }\r
  99                 \r
 100         uint32_t nb_frames() const override\r
 101         {\r
 102                 return std::min(fill_producer_->nb_frames(), key_producer_->nb_frames());\r
 103         }\r
 104 \r
 105         std::wstring print() const override\r
 106         {\r
 107                 return L"separated[fill:" + fill_producer_->print() + L"|key[" + key_producer_->print() + L"]]";\r
 108         }       \r
 109 \r
 110         boost::unique_future<std::wstring> call(const std::wstring& str) override\r
 111         {\r
 112                 key_producer_->call(str);\r
 113                 return fill_producer_->call(str);\r
 114         }\r
 115 \r
 116         std::wstring name() const override\r
 117         {\r
 118                 return L"separated";\r
 119         }\r
 120 \r
 121         boost::property_tree::wptree info() const override\r
 122         {\r
 123                 return fill_producer_->info();;\r
 124         }\r
 125 \r
 126         void subscribe(const monitor::observable::observer_ptr& o) override                                                                                                                     \r
 127         {\r
 128                 return event_subject_.subscribe(o);\r
 129         }\r
 130 \r
 131         void unsubscribe(const monitor::observable::observer_ptr& o) override           \r
 132         {\r
 133                 return event_subject_.unsubscribe(o);\r
 134         }\r
 135 };\r
 136 \r
 137 spl::shared_ptr<frame_producer> create_separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)\r
 138 {\r
 139         return spl::make_shared<separated_producer>(fill, key);\r
 140 }\r
 141 \r
 142 }}\r
 143 \r