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