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 namespace caspar { namespace core {     \r
  27 \r
  28 struct separated_producer : public frame_producer\r
  29 {               \r
  30         safe_ptr<frame_producer>        fill_producer_;\r
  31         safe_ptr<frame_producer>        key_producer_;\r
  32         safe_ptr<basic_frame>           fill_;\r
  33         safe_ptr<basic_frame>           key_;\r
  34         safe_ptr<basic_frame>           last_frame_;\r
  35         int64_t                                         nb_frames_;\r
  36                 \r
  37         explicit separated_producer(const safe_ptr<frame_producer>& fill, const safe_ptr<frame_producer>& key) \r
  38                 : fill_producer_(fill)\r
  39                 , key_producer_(key)\r
  40                 , fill_(core::basic_frame::late())\r
  41                 , key_(core::basic_frame::late())\r
  42                 , last_frame_(core::basic_frame::empty())\r
  43         {\r
  44         }\r
  45         // frame_producer\r
  46         \r
  47         virtual safe_ptr<basic_frame> receive(int hints)\r
  48         {\r
  49                 if(fill_ == core::basic_frame::late())\r
  50                         fill_ = receive_and_follow(fill_producer_, hints);\r
  51                 \r
  52                 if(key_ == core::basic_frame::late())\r
  53                         key_ = receive_and_follow(key_producer_, hints | ALPHA_HINT);\r
  54 \r
  55                 if(fill_ == basic_frame::eof() || key_ == basic_frame::eof())\r
  56                         return basic_frame::eof();\r
  57 \r
  58                 if(fill_ == core::basic_frame::late() || key_ == core::basic_frame::late()) // One of the producers is lagging, keep them in sync.\r
  59                         return core::basic_frame::late();\r
  60                 \r
  61                 auto frame = basic_frame::fill_and_key(fill_, key_);\r
  62 \r
  63                 fill_ = basic_frame::late();\r
  64                 key_ = basic_frame::late();\r
  65 \r
  66                 return last_frame_ = frame;\r
  67         }\r
  68 \r
  69         virtual safe_ptr<core::basic_frame> last_frame() const\r
  70         {\r
  71                 return last_frame_;\r
  72         }\r
  73 \r
  74         virtual std::wstring print() const\r
  75         {\r
  76                 return L"separated";\r
  77         }       \r
  78 \r
  79         virtual int64_t nb_frames() const \r
  80         {\r
  81                 return std::min(fill_producer_->nb_frames() > 0 ? fill_producer_->nb_frames() : std::numeric_limits<int64_t>::max(), \r
  82                                             key_producer_->nb_frames() > 0 ? key_producer_->nb_frames() : std::numeric_limits<int64_t>::max());\r
  83         }\r
  84 };\r
  85 \r
  86 safe_ptr<frame_producer> create_separated_producer(const safe_ptr<frame_producer>& fill, const safe_ptr<frame_producer>& key)\r
  87 {\r
  88         return make_safe<separated_producer>(fill, key);\r
  89 }\r
  90 \r
  91 }}\r
  92 \r