git.sesse.net Git - casparcg/blob - core/producer/separated/separated_producer.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\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 */ \r
  20 #include "../../stdafx.h"\r
  21 \r
  22 #include "separated_producer.h"\r
  23 \r
  24 #include <core/producer/frame/basic_frame.h>\r
  25 \r
  26 #include <tbb/parallel_invoke.h>\r
  27 \r
  28 namespace caspar { namespace core {     \r
  29 \r
  30 struct separated_producer : public frame_producer\r
  31 {               \r
  32         safe_ptr<frame_producer>        fill_producer_;\r
  33         safe_ptr<frame_producer>        key_producer_;\r
  34         safe_ptr<basic_frame>           fill_;\r
  35         safe_ptr<basic_frame>           key_;\r
  36         safe_ptr<basic_frame>           last_frame_;\r
  37                 \r
  38         explicit separated_producer(const safe_ptr<frame_producer>& fill, const safe_ptr<frame_producer>& key) \r
  39                 : fill_producer_(fill)\r
  40                 , key_producer_(key)\r
  41                 , fill_(core::basic_frame::late())\r
  42                 , key_(core::basic_frame::late())\r
  43                 , last_frame_(core::basic_frame::empty()){}\r
  44         \r
  45         // frame_producer\r
  46         \r
  47         virtual safe_ptr<basic_frame> receive(int hints)\r
  48         {\r
  49                 tbb::parallel_invoke\r
  50                 (\r
  51                         [&]\r
  52                         {\r
  53                                 if(fill_ == core::basic_frame::late())\r
  54                                         fill_ = receive_and_follow(fill_producer_, hints);\r
  55                         },\r
  56                         [&]\r
  57                         {\r
  58                                 if(key_ == core::basic_frame::late())\r
  59                                         key_ = receive_and_follow(key_producer_, hints | ALPHA_HINT);\r
  60                         }\r
  61                 );\r
  62 \r
  63                 if(fill_ == basic_frame::eof())\r
  64                         return basic_frame::eof();\r
  65 \r
  66                 if(fill_ == core::basic_frame::late() || key_ == core::basic_frame::late()) // One of the producers is lagging, keep them in sync.\r
  67                         return core::basic_frame::late();\r
  68                 \r
  69                 auto frame = basic_frame::fill_and_key(fill_, key_);\r
  70 \r
  71                 fill_ = basic_frame::late();\r
  72                 key_ = basic_frame::late();\r
  73 \r
  74                 return last_frame_ = frame;\r
  75         }\r
  76 \r
  77         virtual safe_ptr<core::basic_frame> last_frame() const\r
  78         {\r
  79                 return last_frame_;\r
  80         }\r
  81 \r
  82         virtual std::wstring print() const\r
  83         {\r
  84                 return L"separated";\r
  85         }       \r
  86 };\r
  87 \r
  88 safe_ptr<frame_producer> create_separated_producer(const safe_ptr<frame_producer>& fill, const safe_ptr<frame_producer>& key)\r
  89 {\r
  90         return make_safe<separated_producer>(fill, key);\r
  91 }\r
  92 \r
  93 }}\r
  94 \r