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 \r
  26 #include "color/color_producer.h"\r
  27 #include "separated/separated_producer.h"\r
  28 \r
  29 #include <common/memory/safe_ptr.h>\r
  30 \r
  31 namespace caspar { namespace core {\r
  32         \r
  33 std::vector<const producer_factory_t> g_factories;\r
  34 \r
  35 const safe_ptr<frame_producer>& frame_producer::empty() // nothrow\r
  36 {\r
  37         struct empty_frame_producer : public frame_producer\r
  38         {\r
  39                 virtual safe_ptr<basic_frame> receive(){return basic_frame::empty();}\r
  40                 virtual void set_frame_factory(const safe_ptr<frame_factory>&){}\r
  41                 virtual std::wstring print() const { return L"empty";}\r
  42         };\r
  43         static safe_ptr<frame_producer> producer = make_safe<empty_frame_producer>();\r
  44         return producer;\r
  45 }       \r
  46 \r
  47 safe_ptr<basic_frame> frame_producer::receive_save_last()\r
  48 {\r
  49         auto frame = receive();\r
  50         if(frame != core::basic_frame::late())\r
  51         {\r
  52                 last_frame_ = make_safe<basic_frame>(frame);\r
  53                 last_frame_->get_audio_transform().set_has_audio(false);\r
  54         }       \r
  55         return frame;\r
  56 }\r
  57 \r
  58 safe_ptr<basic_frame> receive(const safe_ptr<frame_producer>& producer)\r
  59 {\r
  60         return producer->receive_save_last();\r
  61 }\r
  62 \r
  63 safe_ptr<basic_frame> receive_and_follow(safe_ptr<frame_producer>& producer)\r
  64 {       \r
  65         if(producer == frame_producer::empty())\r
  66                 return basic_frame::eof();\r
  67 \r
  68         auto frame = basic_frame::eof();\r
  69         try\r
  70         {\r
  71                 frame = receive(producer);\r
  72         }\r
  73         catch(...)\r
  74         {\r
  75                 try\r
  76                 {\r
  77                         // Producer will be removed since frame == basic_frame::eof.\r
  78                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  79                         CASPAR_LOG(warning) << producer->print() << " Failed to receive frame. Removing producer.";\r
  80                 }\r
  81                 catch(...){}\r
  82         }\r
  83 \r
  84         if(frame == basic_frame::eof())\r
  85         {\r
  86                 CASPAR_LOG(info) << producer->print() << " End Of File.";\r
  87                 auto following = producer->get_following_producer();\r
  88                 following->set_leading_producer(producer);\r
  89                 producer = std::move(following);                \r
  90                 \r
  91                 return receive_and_follow(producer);\r
  92         }\r
  93         return frame;\r
  94 }\r
  95 \r
  96 safe_ptr<basic_frame> receive_and_follow_w_last(safe_ptr<frame_producer>& producer)\r
  97 {\r
  98         auto frame = receive_and_follow(producer);\r
  99         if(frame == basic_frame::late())\r
 100                 frame = producer->last_frame();\r
 101         return frame;\r
 102 }\r
 103 \r
 104 void register_producer_factory(const producer_factory_t& factory)\r
 105 {\r
 106         g_factories.push_back(factory);\r
 107 }\r
 108 \r
 109 safe_ptr<core::frame_producer> do_create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 110 {\r
 111         if(params.empty())\r
 112                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 113         \r
 114         auto producer = frame_producer::empty();\r
 115         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
 116                 {\r
 117                         try\r
 118                         {\r
 119                                 producer = factory(my_frame_factory, params);\r
 120                         }\r
 121                         catch(...)\r
 122                         {\r
 123                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 124                         }\r
 125                         return producer != frame_producer::empty();\r
 126                 });\r
 127 \r
 128         if(producer == frame_producer::empty())\r
 129                 producer = create_color_producer(my_frame_factory, params);\r
 130 \r
 131         if(producer == frame_producer::empty())\r
 132                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax."));\r
 133 \r
 134         return producer;\r
 135 }\r
 136 \r
 137 \r
 138 safe_ptr<core::frame_producer> create_producer(const safe_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 139 {       \r
 140         auto producer = do_create_producer(my_frame_factory, params);\r
 141         auto key_producer = frame_producer::empty();\r
 142         \r
 143         try // to find a key file.\r
 144         {\r
 145                 auto params_copy = params;\r
 146                 if(params_copy.size() > 0)\r
 147                 {\r
 148                         params_copy[0] += L"_A";\r
 149                         key_producer = do_create_producer(my_frame_factory, params_copy);                       \r
 150                 }\r
 151         }\r
 152         catch(...){}\r
 153 \r
 154         if(key_producer != frame_producer::empty())\r
 155                 return create_separated_producer(producer, key_producer);\r
 156 \r
 157         return producer;\r
 158 }\r
 159 \r
 160 }}