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 void register_producer_factory(const producer_factory_t& factory)\r
  43 {\r
  44         g_factories.push_back(factory);\r
  45 }\r
  46 \r
  47 spl::shared_ptr<class draw_frame> frame_producer::last_frame() const\r
  48 {\r
  49         BOOST_THROW_EXCEPTION(not_implemented());\r
  50 }\r
  51 \r
  52 boost::unique_future<std::wstring> frame_producer::call(const std::wstring&) \r
  53 {\r
  54         BOOST_THROW_EXCEPTION(not_supported());\r
  55 }\r
  56 \r
  57 const spl::shared_ptr<frame_producer>& frame_producer::empty() // nothrow\r
  58 {\r
  59 \r
  60 struct empty_frame_producer : public frame_producer\r
  61 {\r
  62         virtual spl::shared_ptr<draw_frame> receive(int){return draw_frame::empty();}\r
  63         virtual spl::shared_ptr<draw_frame> last_frame() const{return draw_frame::empty();}\r
  64         virtual void set_frame_factory(const spl::shared_ptr<frame_factory>&){}\r
  65         virtual uint32_t nb_frames() const {return 0;}\r
  66         virtual std::wstring print() const { return L"empty";}\r
  67         virtual void subscribe(const monitor::observable::observer_ptr& o){}\r
  68         virtual void unsubscribe(const monitor::observable::observer_ptr& o){}  \r
  69         virtual std::wstring name() const {return L"empty";}\r
  70         \r
  71         virtual boost::property_tree::wptree info() const override\r
  72         {\r
  73                 boost::property_tree::wptree info;\r
  74                 info.add(L"type", L"empty-producer");\r
  75                 return info;\r
  76         }\r
  77 };\r
  78 \r
  79         static spl::shared_ptr<frame_producer> producer = spl::make_shared<empty_frame_producer>();\r
  80         return producer;\r
  81 }       \r
  82 \r
  83 class producer_proxy : public frame_producer\r
  84 {       \r
  85         std::shared_ptr<frame_producer> producer_;\r
  86         spl::shared_ptr<draw_frame>             last_frame_;\r
  87 public:\r
  88         producer_proxy(spl::shared_ptr<frame_producer>&& producer) \r
  89                 : producer_(std::move(producer))\r
  90         {\r
  91                 CASPAR_LOG(info) << producer_->print() << L" Initialized.";\r
  92         }\r
  93 \r
  94         virtual ~producer_proxy()\r
  95         {               \r
  96                 static tbb::atomic<int> counter = tbb::atomic<int>();\r
  97                 \r
  98                 ++counter;\r
  99                 CASPAR_VERIFY(counter < 32);\r
 100                 \r
 101                 auto producer = new spl::shared_ptr<frame_producer>(std::move(producer_));\r
 102                 async([=]\r
 103                 {\r
 104                         std::unique_ptr<spl::shared_ptr<frame_producer>> pointer_guard(producer);\r
 105                         auto str = (*producer)->print();\r
 106                         try\r
 107                         {\r
 108                                 if(!producer->unique())\r
 109                                         CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << producer->use_count();\r
 110                                 else\r
 111                                         CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";\r
 112                         }\r
 113                         catch(...){}\r
 114                         \r
 115                         CASPAR_LOG(trace) << str << L" Uninitializing.";\r
 116                         pointer_guard.reset();\r
 117                         CASPAR_LOG(info) << str << L" Uninitialized.";\r
 118 \r
 119                         --counter;\r
 120                 }); \r
 121         }\r
 122         \r
 123         virtual spl::shared_ptr<draw_frame>     receive(int hints) override                                                                                                             \r
 124         {\r
 125                 auto frame = producer_->receive(hints);\r
 126                 \r
 127                 if(frame != draw_frame::late())\r
 128                         last_frame_ = frame;\r
 129 \r
 130                 return std::move(frame);\r
 131         }\r
 132         virtual spl::shared_ptr<draw_frame>     last_frame() const override                                                                                                             \r
 133         {\r
 134                 return draw_frame::still(last_frame_);\r
 135         }\r
 136 \r
 137         virtual std::wstring                                                                            print() const override                                                                                                                  {return producer_->print();}\r
 138         virtual std::wstring                                                                            name() const override                                                                                                                   {return producer_->name();}\r
 139         virtual boost::property_tree::wptree                                            info() const override                                                                                                                   {return producer_->info();}\r
 140         virtual boost::unique_future<std::wstring>                                      call(const std::wstring& str) override                                                                                  {return producer_->call(str);}\r
 141         virtual void                                                                                            leading_producer(const spl::shared_ptr<frame_producer>& producer) override              {return producer_->leading_producer(producer);}\r
 142         virtual uint32_t                                                                                        nb_frames() const override                                                                                                              {return producer_->nb_frames();}\r
 143         virtual void subscribe(const monitor::observable::observer_ptr& o)                                                                                                                                                      {return producer_->subscribe(o);}\r
 144         virtual void unsubscribe(const monitor::observable::observer_ptr& o)                                                                                                                                            {return producer_->unsubscribe(o);}\r
 145 };\r
 146 \r
 147 spl::shared_ptr<core::frame_producer> wrap_producer(spl::shared_ptr<core::frame_producer> producer)\r
 148 {\r
 149         return spl::make_shared<producer_proxy>(std::move(producer));\r
 150 }\r
 151 \r
 152 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
 153 {\r
 154         if(params.empty())\r
 155                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 156         \r
 157         auto producer = frame_producer::empty();\r
 158         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
 159                 {\r
 160                         try\r
 161                         {\r
 162                                 producer = factory(my_frame_factory, params);\r
 163                         }\r
 164                         catch(...)\r
 165                         {\r
 166                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 167                         }\r
 168                         return producer != frame_producer::empty();\r
 169                 });\r
 170 \r
 171         if(producer == frame_producer::empty())\r
 172                 producer = create_color_producer(my_frame_factory, params);\r
 173 \r
 174         if(producer == frame_producer::empty())\r
 175                 return producer;\r
 176                 \r
 177         return producer;\r
 178 }\r
 179 \r
 180 spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& my_frame_factory, const std::vector<std::wstring>& params)\r
 181 {       \r
 182         auto producer = do_create_producer(my_frame_factory, params);\r
 183         auto key_producer = frame_producer::empty();\r
 184         \r
 185         try // to find a key file.\r
 186         {\r
 187                 auto params_copy = params;\r
 188                 if(params_copy.size() > 0)\r
 189                 {\r
 190                         params_copy[0] += L"_A";\r
 191                         key_producer = do_create_producer(my_frame_factory, params_copy);                       \r
 192                         if(key_producer == frame_producer::empty())\r
 193                         {\r
 194                                 params_copy[0] += L"LPHA";\r
 195                                 key_producer = do_create_producer(my_frame_factory, params_copy);       \r
 196                         }\r
 197                 }\r
 198         }\r
 199         catch(...){}\r
 200 \r
 201         if(producer != frame_producer::empty() && key_producer != frame_producer::empty())\r
 202                 return create_separated_producer(producer, key_producer);\r
 203         \r
 204         if(producer == frame_producer::empty())\r
 205         {\r
 206                 std::wstring str;\r
 207                 BOOST_FOREACH(auto& param, params)\r
 208                         str += param + L" ";\r
 209                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(u8(str)));\r
 210         }\r
 211 \r
 212         return producer;\r
 213 }\r
 214 \r
 215 \r
 216 spl::shared_ptr<core::frame_producer> create_producer(const spl::shared_ptr<frame_factory>& factory, const std::wstring& params)\r
 217 {\r
 218         std::wstringstream iss(params);\r
 219         std::vector<std::wstring> tokens;\r
 220         typedef std::istream_iterator<std::wstring, wchar_t, std::char_traits<wchar_t> > iterator;\r
 221         std::copy(iterator(iss),  iterator(), std::back_inserter(tokens));\r
 222         return create_producer(factory, tokens);\r
 223 }\r
 224 \r
 225 }}