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         }\r
  46         // frame_producer\r
  47         \r
  48         virtual safe_ptr<basic_frame> receive(int hints)\r
  49         {\r
  50                 tbb::parallel_invoke(\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                 if(fill_ == basic_frame::eof() || key_ == basic_frame::eof())\r
  63                         return basic_frame::eof();\r
  64 \r
  65                 if(fill_ == core::basic_frame::late() || key_ == core::basic_frame::late()) // One of the producers is lagging, keep them in sync.\r
  66                         return core::basic_frame::late();\r
  67                 \r
  68                 auto frame = basic_frame::fill_and_key(fill_, key_);\r
  69 \r
  70                 fill_ = basic_frame::late();\r
  71                 key_  = basic_frame::late();\r
  72 \r
  73                 return last_frame_ = frame;\r
  74         }\r
  75 \r
  76         virtual safe_ptr<core::basic_frame> last_frame() const\r
  77         {\r
  78                 return last_frame_;\r
  79         }\r
  80 \r
  81         virtual std::wstring print() const\r
  82         {\r
  83                 return L"separated[fill:" + fill_producer_->print() + L"|key:" + key_producer_->print() + L"]";\r
  84         }       \r
  85 \r
  86         virtual int64_t nb_frames() const \r
  87         {\r
  88                 return std::min(fill_producer_->nb_frames(), key_producer_->nb_frames());\r
  89         }\r
  90 };\r
  91 \r
  92 safe_ptr<frame_producer> create_separated_producer(const safe_ptr<frame_producer>& fill, const safe_ptr<frame_producer>& key)\r
  93 {\r
  94         return make_safe<separated_producer>(fill, key);\r
  95 }\r
  96 \r
  97 }}\r
  98 \r