git.sesse.net Git - casparcg/blob - core/producer/frame_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 \r
  21 #include "../StdAfx.h"\r
  22 \r
  23 #include "frame_producer.h"\r
  24 #include "frame/basic_frame.h"\r
  25 #include "frame/audio_transform.h"\r
  26 \r
  27 #include "color/color_producer.h"\r
  28 #include "separated/separated_producer.h"\r
  29 \r
  30 #include <common/memory/safe_ptr.h>\r
  31 #include <common/exception/exceptions.h>\r
  32 \r
  33 namespace caspar { namespace core {\r
  34         \r
  35 std::vector<const producer_factory_t> g_factories;\r
  36 \r
  37 const safe_ptr<frame_producer>& frame_producer::empty() // nothrow\r
  38 {\r
  39         struct empty_frame_producer : public frame_producer\r
  40         {\r
  41                 virtual safe_ptr<basic_frame> receive(int){return basic_frame::empty();}\r
  42                 virtual safe_ptr<basic_frame> last_frame() const{return basic_frame::empty();}\r
  43                 virtual void set_frame_factory(const safe_ptr<frame_factory>&){}\r
  44                 virtual std::wstring print() const { return L"empty";}\r
  45         };\r
  46         static safe_ptr<frame_producer> producer = make_safe<empty_frame_producer>();\r
  47         return producer;\r
  48 }       \r
  49 \r
  50 safe_ptr<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer, int hints)\r
  51 {       \r
  52         if(producer == frame_producer::empty())\r
  53                 return basic_frame::eof();\r
  54 \r
  55         auto frame = basic_frame::eof();\r
  56         try\r
  57         {\r
  58                 frame = producer->receive(hints);\r
  59         }\r
  60         catch(...)\r
  61         {\r
  62                 try\r
  63                 {\r
  64                         // Producer will be removed since frame == basic_frame::eof.\r
  65                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  66                         CASPAR_LOG(warning) << producer->print() << " Failed to receive frame. Removing producer.";\r
  67                 }\r
  68                 catch(...){}\r
  69         }\r
  70 \r
  71         if(frame == basic_frame::eof())\r
  72         {\r
  73                 CASPAR_LOG(info) << producer->print() << " End Of File.";\r
  74                 auto following = producer->get_following_producer();\r
  75                 following->set_leading_producer(producer);\r
  76                 producer = std::move(following);                \r
  77                 \r
  78                 return receive_and_follow(producer, hints);\r
  79         }\r
  80         return frame;\r
  81 }\r
  82 \r
  83 void register_producer_factory(const producer_factory_t& factory)\r
  84 {\r
  85         g_factories.push_back(factory);\r
  86 }\r
  87 \r
  88 safe_ptr<core::frame_producer> do_create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
  89 {\r
  90         if(params.empty())\r
  91                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
  92         \r
  93         auto producer = frame_producer::empty();\r
  94         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
  95                 {\r
  96                         try\r
  97                         {\r
  98                                 producer = factory(my_frame_factory, params);\r
  99                         }\r
 100                         catch(...)\r
 101                         {\r
 102                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 103                         }\r
 104                         return producer != frame_producer::empty();\r
 105                 });\r
 106 \r
 107         if(producer == frame_producer::empty())\r
 108                 producer = create_color_producer(my_frame_factory, params);\r
 109 \r
 110         if(producer == frame_producer::empty())\r
 111                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(params.size() > 0 ? narrow(params[0]) : ""));\r
 112 \r
 113         return producer;\r
 114 }\r
 115 \r
 116 \r
 117 safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 118 {       \r
 119         auto producer = do_create_producer(my_frame_factory, params);\r
 120         auto key_producer = frame_producer::empty();\r
 121         \r
 122         try // to find a key file.\r
 123         {\r
 124                 auto params_copy = params;\r
 125                 if(params_copy.size() > 0)\r
 126                 {\r
 127                         params_copy[0] += L"_A";\r
 128                         key_producer = do_create_producer(my_frame_factory, params_copy);                       \r
 129                 }\r
 130         }\r
 131         catch(...){}\r
 132 \r
 133         if(key_producer != frame_producer::empty())\r
 134                 return create_separated_producer(producer, key_producer);\r
 135 \r
 136         return producer;\r
 137 }\r
 138 \r
 139 }}