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_base\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                         \r
  44 public:\r
  45         explicit separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key) \r
  46                 : key_event_subject_("keyer")           \r
  47                 , fill_producer_(fill)\r
  48                 , key_producer_(key)\r
  49                 , fill_(core::draw_frame::late())\r
  50                 , key_(core::draw_frame::late())\r
  51         {\r
  52                 CASPAR_LOG(info) << print() << L" Initialized";\r
  53 \r
  54                 key_event_subject_.subscribe(event_subject_);\r
  55 \r
  56                 key_producer_->subscribe(key_event_subject_);\r
  57                 fill_producer_->subscribe(event_subject_);\r
  58         }\r
  59 \r
  60         // frame_producer\r
  61         \r
  62         draw_frame receive_impl() override\r
  63         {\r
  64                 tbb::parallel_invoke(\r
  65                 [&]\r
  66                 {\r
  67                         if(fill_ == core::draw_frame::late())\r
  68                                 fill_ = fill_producer_->receive();\r
  69                 },\r
  70                 [&]\r
  71                 {\r
  72                         if(key_ == core::draw_frame::late())\r
  73                                 key_ = key_producer_->receive();\r
  74                 });\r
  75                 \r
  76                 if(fill_ == core::draw_frame::late() || key_ == core::draw_frame::late()) // One of the producers is lagging, keep them in sync.\r
  77                         return core::draw_frame::late();\r
  78                 \r
  79                 auto frame = draw_frame::mask(fill_, key_);\r
  80 \r
  81                 fill_ = draw_frame::late();\r
  82                 key_  = draw_frame::late();\r
  83                 \r
  84                 return frame;\r
  85         }\r
  86 \r
  87         draw_frame last_frame()\r
  88         {\r
  89                 return draw_frame::mask(fill_producer_->last_frame(), key_producer_->last_frame());\r
  90         }\r
  91                                 \r
  92         uint32_t nb_frames() const override\r
  93         {\r
  94                 return std::min(fill_producer_->nb_frames(), key_producer_->nb_frames());\r
  95         }\r
  96 \r
  97         std::wstring print() const override\r
  98         {\r
  99                 return L"separated[fill:" + fill_producer_->print() + L"|key[" + key_producer_->print() + L"]]";\r
 100         }       \r
 101 \r
 102         boost::unique_future<std::wstring> call(const std::wstring& str) override\r
 103         {\r
 104                 key_producer_->call(str);\r
 105                 return fill_producer_->call(str);\r
 106         }\r
 107 \r
 108         std::wstring name() const override\r
 109         {\r
 110                 return L"separated";\r
 111         }\r
 112 \r
 113         boost::property_tree::wptree info() const override\r
 114         {\r
 115                 return fill_producer_->info();;\r
 116         }\r
 117 \r
 118         void subscribe(const monitor::observable::observer_ptr& o) override                                                                                                                     \r
 119         {\r
 120                 return event_subject_.subscribe(o);\r
 121         }\r
 122 \r
 123         void unsubscribe(const monitor::observable::observer_ptr& o) override           \r
 124         {\r
 125                 return event_subject_.unsubscribe(o);\r
 126         }\r
 127 };\r
 128 \r
 129 spl::shared_ptr<frame_producer> create_separated_producer(const spl::shared_ptr<frame_producer>& fill, const spl::shared_ptr<frame_producer>& key)\r
 130 {\r
 131         return spl::make_shared<separated_producer>(fill, key);\r
 132 }\r
 133 \r
 134 }}\r
 135 \r