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/executor.h>\r
  35 #include <common/future.h>\r
  36 #include <common/memory.h>\r
  37 \r
  38 #include <boost/thread.hpp>\r
  39 \r
  40 namespace caspar { namespace core {\r
  41         \r
  42 std::vector<const producer_factory_t> g_factories;\r
  43 \r
  44 void register_producer_factory(const producer_factory_t& factory)\r
  45 {\r
  46         g_factories.push_back(factory);\r
  47 }\r
  48 \r
  49 boost::unique_future<std::wstring> frame_producer::call(const std::wstring&) \r
  50 {\r
  51         BOOST_THROW_EXCEPTION(not_supported());\r
  52 }\r
  53 \r
  54 const spl::shared_ptr<frame_producer>& frame_producer::empty() \r
  55 {\r
  56         class empty_frame_producer : public frame_producer\r
  57         {\r
  58         public:\r
  59                 empty_frame_producer(){}\r
  60                 virtual draw_frame receive(int){return draw_frame::empty();}\r
  61                 virtual draw_frame last_frame() const{return draw_frame::empty();}\r
  62                 virtual void set_frame_factory(const spl::shared_ptr<frame_factory>&){}\r
  63                 virtual uint32_t nb_frames() const {return 0;}\r
  64                 virtual std::wstring print() const { return L"empty";}\r
  65                 virtual void subscribe(const monitor::observable::observer_ptr& o){}\r
  66                 virtual void unsubscribe(const monitor::observable::observer_ptr& o){}  \r
  67                 virtual std::wstring name() const {return L"empty";}\r
  68         \r
  69                 boost::property_tree::wptree info() const override\r
  70                 {\r
  71                         boost::property_tree::wptree info;\r
  72                         info.add(L"type", L"empty-producer");\r
  73                         return info;\r
  74                 }\r
  75         };\r
  76 \r
  77         static spl::shared_ptr<frame_producer> producer = spl::make_shared<empty_frame_producer>();\r
  78         return producer;\r
  79 }       \r
  80 \r
  81 class destroy_producer_proxy : public frame_producer\r
  82 {       \r
  83         std::shared_ptr<frame_producer> producer_;\r
  84 public:\r
  85         destroy_producer_proxy(spl::shared_ptr<frame_producer>&& producer) \r
  86                 : producer_(std::move(producer))\r
  87         {\r
  88         }\r
  89 \r
  90         virtual ~destroy_producer_proxy()\r
  91         {               \r
  92                 static tbb::atomic<int> counter = tbb::atomic<int>();\r
  93                 \r
  94                 if(producer_ == core::frame_producer::empty())\r
  95                         return;\r
  96 \r
  97                 ++counter;\r
  98                 CASPAR_VERIFY(counter < 8);\r
  99                 \r
 100                 auto producer = new spl::shared_ptr<frame_producer>(std::move(producer_));\r
 101                 boost::thread([=]\r
 102                 {\r
 103                         std::unique_ptr<spl::shared_ptr<frame_producer>> pointer_guard(producer);\r
 104                         auto str = (*producer)->print();\r
 105                         try\r
 106                         {\r
 107                                 if(!producer->unique())\r
 108                                         CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << producer->use_count();\r
 109                                 else\r
 110                                         CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";\r
 111                         }\r
 112                         catch(...){}\r
 113                         \r
 114                         pointer_guard.reset();\r
 115                         CASPAR_LOG(info) << str << L" Destroyed.";\r
 116 \r
 117                         --counter;\r
 118                 }).detach(); \r
 119         }\r
 120         \r
 121         draw_frame      receive(int flags) override                                                                                                                                                             {return producer_->receive(flags);}\r
 122         draw_frame      last_frame() const override                                                                                                                                                             {return producer_->last_frame();}\r
 123         std::wstring                                                                            print() const override                                                                                                                  {return producer_->print();}\r
 124         std::wstring                                                                            name() const override                                                                                                                   {return producer_->name();}\r
 125         boost::property_tree::wptree                                            info() const override                                                                                                                   {return producer_->info();}\r
 126         boost::unique_future<std::wstring>                                      call(const std::wstring& str) override                                                                                  {return producer_->call(str);}\r
 127         void                                                                                            leading_producer(const spl::shared_ptr<frame_producer>& producer) override              {return producer_->leading_producer(producer);}\r
 128         uint32_t                                                                                        nb_frames() const override                                                                                                              {return producer_->nb_frames();}\r
 129         virtual void subscribe(const monitor::observable::observer_ptr& o)                                                                                                                                                      {return producer_->subscribe(o);}\r
 130         virtual void unsubscribe(const monitor::observable::observer_ptr& o)                                                                                                                                            {return producer_->unsubscribe(o);}\r
 131 };\r
 132 \r
 133 spl::shared_ptr<core::frame_producer> create_destroy_proxy(spl::shared_ptr<core::frame_producer> producer)\r
 134 {\r
 135         return spl::make_shared<destroy_producer_proxy>(std::move(producer));\r
 136 }\r
 137 \r
 138 spl::shared_ptr<core::frame_producer> do_create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const video_format_desc& format_desc, const std::vector<std::wstring>& params)\r
 139 {\r
 140         if(params.empty())\r
 141                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 142         \r
 143         auto producer = frame_producer::empty();\r
 144         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
 145                 {\r
 146                         try\r
 147                         {\r
 148                                 producer = factory(my_frame_factory, format_desc, params);\r
 149                         }\r
 150                         catch(...)\r
 151                         {\r
 152                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 153                         }\r
 154                         return producer != frame_producer::empty();\r
 155                 });\r
 156 \r
 157         if(producer == frame_producer::empty())\r
 158                 producer = create_color_producer(my_frame_factory, params);\r
 159 \r
 160         if(producer == frame_producer::empty())\r
 161                 return producer;\r
 162                 \r
 163         return create_destroy_proxy(producer);\r
 164 }\r
 165 \r
 166 spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const video_format_desc& format_desc, const std::vector<std::wstring>& params)\r
 167 {       \r
 168         auto producer = do_create_producer(my_frame_factory, format_desc, params);\r
 169         auto key_producer = frame_producer::empty();\r
 170         \r
 171         try // to find a key file.\r
 172         {\r
 173                 auto params_copy = params;\r
 174                 if(params_copy.size() > 0)\r
 175                 {\r
 176                         params_copy[0] += L"_A";\r
 177                         key_producer = do_create_producer(my_frame_factory, format_desc, params_copy);                  \r
 178                         if(key_producer == frame_producer::empty())\r
 179                         {\r
 180                                 params_copy[0] += L"LPHA";\r
 181                                 key_producer = do_create_producer(my_frame_factory, format_desc, params_copy);  \r
 182                         }\r
 183                 }\r
 184         }\r
 185         catch(...){}\r
 186 \r
 187         if(producer != frame_producer::empty() && key_producer != frame_producer::empty())\r
 188                 return create_separated_producer(producer, key_producer);\r
 189         \r
 190         if(producer == frame_producer::empty())\r
 191         {\r
 192                 std::wstring str;\r
 193                 BOOST_FOREACH(auto& param, params)\r
 194                         str += param + L" ";\r
 195                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(u8(str)));\r
 196         }\r
 197 \r
 198         return producer;\r
 199 }\r
 200 \r
 201 \r
 202 spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& factory, const video_format_desc& format_desc, const std::wstring& params)\r
 203 {\r
 204         std::wstringstream iss(params);\r
 205         std::vector<std::wstring> tokens;\r
 206         typedef std::istream_iterator<std::wstring, wchar_t, std::char_traits<wchar_t> > iterator;\r
 207         std::copy(iterator(iss),  iterator(), std::back_inserter(tokens));\r
 208         return create_producer(factory, format_desc, tokens);\r
 209 }\r
 210 \r
 211 }}