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

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../StdAfx.h"\r
  23 \r
  24 #include "frame_producer.h"\r
  25 \r
  26 #include "../frame/draw_frame.h"\r
  27 #include "../frame/frame_transform.h"\r
  28 \r
  29 #include "color/color_producer.h"\r
  30 #include "separated/separated_producer.h"\r
  31 \r
  32 #include <common/assert.h>\r
  33 #include <common/except.h>\r
  34 #include <common/concurrency/executor.h>\r
  35 #include <common/concurrency/async.h>\r
  36 #include <common/spl/memory.h>\r
  37 \r
  38 namespace caspar { namespace core {\r
  39         \r
  40 std::vector<const producer_factory_t> g_factories;\r
  41 \r
  42 boost::unique_future<std::wstring> frame_producer::call(const std::wstring&) \r
  43 {\r
  44         BOOST_THROW_EXCEPTION(not_supported());\r
  45 }\r
  46 \r
  47 struct empty_frame_producer : public frame_producer\r
  48 {\r
  49         virtual spl::shared_ptr<draw_frame> receive(int){return draw_frame::empty();}\r
  50         virtual spl::shared_ptr<draw_frame> last_frame() const{return draw_frame::empty();}\r
  51         virtual void set_frame_factory(const spl::shared_ptr<frame_factory>&){}\r
  52         virtual uint32_t nb_frames() const {return 0;}\r
  53         virtual std::wstring print() const { return L"empty";}\r
  54         \r
  55         virtual boost::property_tree::wptree info() const override\r
  56         {\r
  57                 boost::property_tree::wptree info;\r
  58                 info.add(L"type", L"empty-producer");\r
  59                 return info;\r
  60         }\r
  61 };\r
  62 \r
  63 const spl::shared_ptr<frame_producer>& frame_producer::empty() // nothrow\r
  64 {\r
  65         static spl::shared_ptr<frame_producer> producer = spl::make_shared<empty_frame_producer>();\r
  66         return producer;\r
  67 }       \r
  68 \r
  69 spl::shared_ptr<draw_frame> receive_and_follow(spl::shared_ptr<frame_producer>& producer, int hints)\r
  70 {       \r
  71         auto frame = producer->receive(hints);\r
  72         if(frame == draw_frame::eof())\r
  73         {\r
  74                 CASPAR_LOG(info) << producer->print() << " End Of File.";\r
  75                 auto following = producer->get_following_producer();\r
  76                 if(following != frame_producer::empty())\r
  77                 {\r
  78                         following->set_leading_producer(producer);\r
  79                         producer = std::move(following);\r
  80                 }\r
  81 \r
  82                 return receive_and_follow(producer, hints);\r
  83         }\r
  84         return frame;\r
  85 }\r
  86 \r
  87 void register_producer_factory(const producer_factory_t& factory)\r
  88 {\r
  89         g_factories.push_back(factory);\r
  90 }\r
  91 \r
  92 class destroy_producer_proxy : public frame_producer\r
  93 {       \r
  94         std::unique_ptr<std::shared_ptr<frame_producer>> producer_;\r
  95 public:\r
  96         destroy_producer_proxy(spl::shared_ptr<frame_producer>&& producer) \r
  97                 : producer_(new std::shared_ptr<frame_producer>(std::move(producer)))\r
  98         {\r
  99         }\r
 100 \r
 101         ~destroy_producer_proxy()\r
 102         {               \r
 103                 static tbb::atomic<int> counter = tbb::atomic<int>();\r
 104 \r
 105                 try\r
 106                 {                               \r
 107                         auto producer = producer_.release();\r
 108                         ++counter;\r
 109                         CASPAR_VERIFY(counter < 32);\r
 110 \r
 111                         async([=]\r
 112                         {\r
 113                                 std::unique_ptr<std::shared_ptr<frame_producer>> producer2(producer);\r
 114 \r
 115                                 auto str = (*producer2)->print();\r
 116                                 try\r
 117                                 {\r
 118                                         if(!producer->unique())\r
 119                                                 CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << producer->use_count();\r
 120                                         else\r
 121                                                 CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";\r
 122                                 }\r
 123                                 catch(...){}\r
 124                                                                 \r
 125                                 producer2.reset();\r
 126 \r
 127                                 --counter;\r
 128                         }); \r
 129                 }\r
 130                 catch(...)\r
 131                 {\r
 132                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 133                         try\r
 134                         {\r
 135                                 producer_.reset();\r
 136                         }\r
 137                         catch(...){}\r
 138                 }\r
 139         }\r
 140 \r
 141         virtual spl::shared_ptr<draw_frame>                                                             receive(int hints) override                                                                                             {return (*producer_)->receive(hints);}\r
 142         virtual spl::shared_ptr<draw_frame>                                                             last_frame() const override                                                                                             {return (*producer_)->last_frame();}\r
 143         virtual std::wstring                                                                            print() const override                                                                                                  {return (*producer_)->print();}\r
 144         virtual boost::property_tree::wptree                                            info() const override                                                                                                   {return (*producer_)->info();}\r
 145         virtual boost::unique_future<std::wstring>                                      call(const std::wstring& str) override                                                                  {return (*producer_)->call(str);}\r
 146         virtual spl::shared_ptr<frame_producer>                                                 get_following_producer() const override                                                                 {return (*producer_)->get_following_producer();}\r
 147         virtual void                                                                                            set_leading_producer(const spl::shared_ptr<frame_producer>& producer) override  {(*producer_)->set_leading_producer(producer);}\r
 148         virtual uint32_t                                                                                        nb_frames() const override                                                                                              {return (*producer_)->nb_frames();}\r
 149 };\r
 150 \r
 151 class print_producer_proxy : public frame_producer\r
 152 {       \r
 153         std::shared_ptr<frame_producer> producer_;\r
 154 public:\r
 155         print_producer_proxy(spl::shared_ptr<frame_producer>&& producer) \r
 156                 : producer_(std::move(producer))\r
 157         {\r
 158                 CASPAR_LOG(info) << producer_->print() << L" Initialized.";\r
 159         }\r
 160 \r
 161         ~print_producer_proxy()\r
 162         {               \r
 163                 auto str = producer_->print();\r
 164                 CASPAR_LOG(trace) << str << L" Uninitializing.";\r
 165                 producer_.reset();\r
 166                 CASPAR_LOG(info) << str << L" Uninitialized.";\r
 167         }\r
 168 \r
 169         virtual spl::shared_ptr<draw_frame>                             receive(int hints) override                                                                                             {return (producer_)->receive(hints);}\r
 170         virtual spl::shared_ptr<draw_frame>                             last_frame() const override                                                                                             {return (producer_)->last_frame();}\r
 171         virtual std::wstring                                            print() const override                                                                                                  {return (producer_)->print();}\r
 172         virtual boost::property_tree::wptree            info() const override                                                                                                   {return (producer_)->info();}\r
 173         virtual boost::unique_future<std::wstring>      call(const std::wstring& str) override                                                                  {return (producer_)->call(str);}\r
 174         virtual spl::shared_ptr<frame_producer>                 get_following_producer() const override                                                                 {return (producer_)->get_following_producer();}\r
 175         virtual void                                                            set_leading_producer(const spl::shared_ptr<frame_producer>& producer) override  {(producer_)->set_leading_producer(producer);}\r
 176         virtual uint32_t                                                        nb_frames() const override                                                                                              {return (producer_)->nb_frames();}\r
 177 };\r
 178 \r
 179 spl::shared_ptr<core::frame_producer> do_create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 180 {\r
 181         if(params.empty())\r
 182                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 183         \r
 184         auto producer = frame_producer::empty();\r
 185         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
 186                 {\r
 187                         try\r
 188                         {\r
 189                                 producer = factory(my_frame_factory, params);\r
 190                         }\r
 191                         catch(...)\r
 192                         {\r
 193                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 194                         }\r
 195                         return producer != frame_producer::empty();\r
 196                 });\r
 197 \r
 198         if(producer == frame_producer::empty())\r
 199                 producer = create_color_producer(my_frame_factory, params);\r
 200                 \r
 201         return spl::make_shared<destroy_producer_proxy>(spl::make_shared<print_producer_proxy>(std::move(producer)));\r
 202 }\r
 203 \r
 204 spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 205 {       \r
 206         auto producer = do_create_producer(my_frame_factory, params);\r
 207         auto key_producer = frame_producer::empty();\r
 208         \r
 209         try // to find a key file.\r
 210         {\r
 211                 auto params_copy = params;\r
 212                 if(params_copy.size() > 0)\r
 213                 {\r
 214                         params_copy[0] += L"_A";\r
 215                         key_producer = do_create_producer(my_frame_factory, params_copy);                       \r
 216                         if(key_producer == frame_producer::empty())\r
 217                         {\r
 218                                 params_copy[0] += L"LPHA";\r
 219                                 key_producer = do_create_producer(my_frame_factory, params_copy);       \r
 220                         }\r
 221                 }\r
 222         }\r
 223         catch(...){}\r
 224 \r
 225         if(producer != frame_producer::empty() && key_producer != frame_producer::empty())\r
 226                 return create_separated_producer(producer, key_producer);\r
 227         \r
 228         if(producer == frame_producer::empty())\r
 229         {\r
 230                 std::wstring str;\r
 231                 BOOST_FOREACH(auto& param, params)\r
 232                         str += param + L" ";\r
 233                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(u8(str)));\r
 234         }\r
 235 \r
 236         return producer;\r
 237 }\r
 238 \r
 239 \r
 240 spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& factory, const std::wstring& params)\r
 241 {\r
 242         std::wstringstream iss(params);\r
 243         std::vector<std::wstring> tokens;\r
 244         typedef std::istream_iterator<std::wstring, wchar_t, std::char_traits<wchar_t> > iterator;\r
 245         std::copy(iterator(iss),  iterator(), std::back_inserter(tokens));\r
 246         return create_producer(factory, tokens);\r
 247 }\r
 248 \r
 249 }}