git.sesse.net Git - casparcg/blob - core/producer/frame_producer.h

   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 #pragma once\r
  21 \r
  22 #include "frame/frame_factory.h"\r
  23 \r
  24 #include <common/memory/safe_ptr.h>\r
  25 \r
  26 #include <boost/noncopyable.hpp>\r
  27 \r
  28 #include <functional>\r
  29 #include <string>\r
  30 #include <vector>\r
  31 \r
  32 namespace caspar { namespace core {\r
  33 \r
  34 class basic_frame;\r
  35 \r
  36 class frame_producer : boost::noncopyable\r
  37 {\r
  38 public:\r
  39         frame_producer();\r
  40         virtual ~frame_producer(){}     \r
  41 \r
  42         virtual std::wstring print() const = 0; // nothrow\r
  43 \r
  44         virtual void param(const std::wstring&){}\r
  45 \r
  46         virtual safe_ptr<frame_producer> get_following_producer() const {return frame_producer::empty();}  // nothrow\r
  47         virtual void set_leading_producer(const safe_ptr<frame_producer>&) {}  // nothrow\r
  48                 \r
  49         static const safe_ptr<frame_producer>& empty(); // nothrow\r
  50 \r
  51         safe_ptr<core::basic_frame> last_frame() const {return last_frame_;}\r
  52         \r
  53 private:\r
  54         friend safe_ptr<basic_frame> receive(const safe_ptr<frame_producer>& producer);\r
  55 \r
  56         virtual safe_ptr<basic_frame> receive() = 0;\r
  57 \r
  58         safe_ptr<basic_frame> receive_save_last();\r
  59 \r
  60         safe_ptr<core::basic_frame> last_frame_;\r
  61 };\r
  62 \r
  63 safe_ptr<basic_frame> receive(const safe_ptr<frame_producer>& producer);\r
  64 safe_ptr<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer);\r
  65 safe_ptr<basic_frame> receive_and_follow_w_last(safe_ptr<frame_producer>& producer);\r
  66 \r
  67 typedef std::function<safe_ptr<core::frame_producer>(const safe_ptr<frame_factory>&, const std::vector<std::wstring>&)> producer_factory_t;\r
  68 void register_producer_factory(const producer_factory_t& factory); // Not thread-safe.\r
  69 safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>&, const std::vector<std::wstring>& params);\r
  70 \r
  71 \r
  72 }}\r