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/frame_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 class last_frame_producer : public frame_producer\r
  38 {\r
  39         const std::wstring                      print_;\r
  40         const safe_ptr<basic_frame>     frame_;\r
  41         const int64_t                           nb_frames_;\r
  42 public:\r
  43         last_frame_producer(const safe_ptr<frame_producer>& producer) \r
  44                 : print_(producer->print())\r
  45                 , frame_(producer->last_frame() != basic_frame::eof() ? producer->last_frame() : basic_frame::empty())\r
  46                 , nb_frames_(producer->nb_frames())\r
  47         {\r
  48         }\r
  49         \r
  50         virtual safe_ptr<basic_frame> receive(int){return frame_;}\r
  51         virtual safe_ptr<core::basic_frame> last_frame() const{return frame_;}\r
  52         virtual std::wstring print() const{return L"dummy[" + print_ + L"]";}\r
  53         virtual int64_t nb_frames() const {return nb_frames_;}  \r
  54 };\r
  55 \r
  56 struct empty_frame_producer : public frame_producer\r
  57 {\r
  58         virtual safe_ptr<basic_frame> receive(int){return basic_frame::empty();}\r
  59         virtual safe_ptr<basic_frame> last_frame() const{return basic_frame::empty();}\r
  60         virtual void set_frame_factory(const safe_ptr<frame_factory>&){}\r
  61         virtual int64_t nb_frames() const {return 0;}\r
  62         virtual std::wstring print() const { return L"empty";}\r
  63 };\r
  64 \r
  65 const safe_ptr<frame_producer>& frame_producer::empty() // nothrow\r
  66 {\r
  67         static safe_ptr<frame_producer> producer = make_safe<empty_frame_producer>();\r
  68         return producer;\r
  69 }       \r
  70 \r
  71 safe_ptr<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer, int hints)\r
  72 {       \r
  73         auto frame = producer->receive(hints);\r
  74         if(frame == basic_frame::eof())\r
  75         {\r
  76                 CASPAR_LOG(info) << producer->print() << " End Of File.";\r
  77                 auto following = producer->get_following_producer();\r
  78                 if(following != frame_producer::empty())\r
  79                 {\r
  80                         following->set_leading_producer(producer);\r
  81                         producer = std::move(following);\r
  82                 }\r
  83                 else\r
  84                         producer = make_safe<last_frame_producer>(producer);\r
  85 \r
  86                 return receive_and_follow(producer, hints);\r
  87         }\r
  88         return frame;\r
  89 }\r
  90 \r
  91 void register_producer_factory(const producer_factory_t& factory)\r
  92 {\r
  93         g_factories.push_back(factory);\r
  94 }\r
  95 \r
  96 safe_ptr<core::frame_producer> do_create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
  97 {\r
  98         if(params.empty())\r
  99                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 100         \r
 101         auto producer = frame_producer::empty();\r
 102         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
 103                 {\r
 104                         try\r
 105                         {\r
 106                                 producer = factory(my_frame_factory, params);\r
 107                         }\r
 108                         catch(...)\r
 109                         {\r
 110                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 111                         }\r
 112                         return producer != frame_producer::empty();\r
 113                 });\r
 114 \r
 115         if(producer == frame_producer::empty())\r
 116                 producer = create_color_producer(my_frame_factory, params);\r
 117         \r
 118         return producer;\r
 119 }\r
 120 \r
 121 \r
 122 safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 123 {       \r
 124         auto producer = do_create_producer(my_frame_factory, params);\r
 125         auto key_producer = frame_producer::empty();\r
 126         \r
 127         try // to find a key file.\r
 128         {\r
 129                 auto params_copy = params;\r
 130                 if(params_copy.size() > 0)\r
 131                 {\r
 132                         params_copy[0] += L"_A";\r
 133                         key_producer = do_create_producer(my_frame_factory, params_copy);                       \r
 134                         if(key_producer == frame_producer::empty())\r
 135                         {\r
 136                                 params_copy[0] += L"LPHA";\r
 137                                 key_producer = do_create_producer(my_frame_factory, params_copy);       \r
 138                         }\r
 139                 }\r
 140         }\r
 141         catch(...){}\r
 142 \r
 143         if(producer != frame_producer::empty() && key_producer != frame_producer::empty())\r
 144                 producer = create_separated_producer(producer, key_producer);\r
 145         \r
 146         if(producer == frame_producer::empty())\r
 147         {\r
 148                 std::wstring str;\r
 149                 BOOST_FOREACH(auto& param, params)\r
 150                         str += param + L" ";\r
 151                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(narrow(str)));\r
 152         }\r
 153 \r
 154         return producer;\r
 155 }\r
 156 \r
 157 }}