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 struct frame_producer_base::impl\r
  50 {\r
  51         tbb::atomic<uint32_t>   frame_number_;\r
  52         tbb::atomic<bool>               paused_;\r
  53         frame_producer_base&    self_;\r
  54         draw_frame                              last_frame_;\r
  55 \r
  56         impl(frame_producer_base& self)\r
  57                 : self_(self)\r
  58                 , last_frame_(draw_frame::empty())\r
  59         {\r
  60                 frame_number_ = 0;\r
  61                 paused_ = false;\r
  62         }\r
  63         \r
  64         draw_frame receive()\r
  65         {\r
  66                 if(paused_)\r
  67                         return self_.last_frame();\r
  68 \r
  69                 auto frame = draw_frame::push(self_.receive_impl());\r
  70                 if(frame == draw_frame::late())\r
  71                         return frame;\r
  72 \r
  73                 ++frame_number_;\r
  74 \r
  75                 return last_frame_ = frame;\r
  76         }\r
  77 \r
  78         void paused(bool value)\r
  79         {\r
  80                 paused_ = value;\r
  81         }\r
  82 \r
  83         draw_frame last_frame() const\r
  84         {\r
  85                 return draw_frame::still(last_frame_);\r
  86         }\r
  87 };\r
  88 \r
  89 frame_producer_base::frame_producer_base() : impl_(new impl(*this))\r
  90 {\r
  91 }\r
  92 \r
  93 draw_frame frame_producer_base::receive()\r
  94 {\r
  95         return impl_->receive();\r
  96 }\r
  97 \r
  98 void frame_producer_base::paused(bool value)\r
  99 {\r
 100         impl_->paused(value);\r
 101 }\r
 102 \r
 103 draw_frame frame_producer_base::last_frame() const\r
 104 {\r
 105         return impl_->last_frame();\r
 106 }\r
 107 \r
 108 boost::unique_future<std::wstring> frame_producer_base::call(const std::wstring&) \r
 109 {\r
 110         BOOST_THROW_EXCEPTION(not_supported());\r
 111 }\r
 112 \r
 113 uint32_t frame_producer_base::nb_frames() const\r
 114 {\r
 115         return std::numeric_limits<uint32_t>::max();\r
 116 }\r
 117 \r
 118 uint32_t frame_producer_base::frame_number() const\r
 119 {\r
 120         return impl_->frame_number_;\r
 121 }\r
 122 \r
 123 const spl::shared_ptr<frame_producer>& frame_producer::empty() \r
 124 {\r
 125         class empty_frame_producer : public frame_producer\r
 126         {\r
 127         public:\r
 128                 empty_frame_producer(){}\r
 129                 draw_frame receive() override{return draw_frame::empty();}\r
 130                 void paused(bool value) override{}\r
 131                 uint32_t nb_frames() const override {return 0;}\r
 132                 std::wstring print() const override { return L"empty";}\r
 133                 void subscribe(const monitor::observable::observer_ptr& o) override{}\r
 134                 void unsubscribe(const monitor::observable::observer_ptr& o) override{} \r
 135                 std::wstring name() const override {return L"empty";}\r
 136                 uint32_t frame_number() const override {return 0;}\r
 137                 boost::unique_future<std::wstring> call(const std::wstring& params) override{BOOST_THROW_EXCEPTION(not_supported());}\r
 138                 draw_frame last_frame() const {return draw_frame::empty();}\r
 139         \r
 140                 boost::property_tree::wptree info() const override\r
 141                 {\r
 142                         boost::property_tree::wptree info;\r
 143                         info.add(L"type", L"empty-producer");\r
 144                         return info;\r
 145                 }\r
 146         };\r
 147 \r
 148         static spl::shared_ptr<frame_producer> producer = spl::make_shared<empty_frame_producer>();\r
 149         return producer;\r
 150 }       \r
 151 \r
 152 class destroy_producer_proxy : public frame_producer\r
 153 {       \r
 154         std::shared_ptr<frame_producer> producer_;\r
 155 public:\r
 156         destroy_producer_proxy(spl::shared_ptr<frame_producer>&& producer) \r
 157                 : producer_(std::move(producer))\r
 158         {\r
 159         }\r
 160 \r
 161         virtual ~destroy_producer_proxy()\r
 162         {               \r
 163                 static tbb::atomic<int> counter = tbb::atomic<int>();\r
 164                 \r
 165                 if(producer_ == core::frame_producer::empty())\r
 166                         return;\r
 167 \r
 168                 ++counter;\r
 169                 CASPAR_VERIFY(counter < 8);\r
 170                 \r
 171                 auto producer = new spl::shared_ptr<frame_producer>(std::move(producer_));\r
 172                 boost::thread([=]\r
 173                 {\r
 174                         std::unique_ptr<spl::shared_ptr<frame_producer>> pointer_guard(producer);\r
 175                         auto str = (*producer)->print();\r
 176                         try\r
 177                         {\r
 178                                 if(!producer->unique())\r
 179                                         CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << producer->use_count();\r
 180                                 else\r
 181                                         CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";\r
 182                         }\r
 183                         catch(...){}\r
 184                         \r
 185                         pointer_guard.reset();\r
 186                         CASPAR_LOG(info) << str << L" Destroyed.";\r
 187 \r
 188                         --counter;\r
 189                 }).detach(); \r
 190         }\r
 191         \r
 192         draw_frame      receive() override                                                                                                                                                                                                              {return producer_->receive();}\r
 193         std::wstring                                                                            print() const override                                                                                                                  {return producer_->print();}\r
 194         void                                                                                            paused(bool value) override                                                                                                             {producer_->paused(value);}\r
 195         std::wstring                                                                            name() const override                                                                                                                   {return producer_->name();}\r
 196         void                                                                                            puased(bool value)                                                                                                                              {producer_->paused(value);}\r
 197         uint32_t                                                                                        frame_number() const override                                                                                                   {return producer_->frame_number();}\r
 198         boost::property_tree::wptree                                            info() const override                                                                                                                   {return producer_->info();}\r
 199         boost::unique_future<std::wstring>                                      call(const std::wstring& str) override                                                                                  {return producer_->call(str);}\r
 200         void                                                                                            leading_producer(const spl::shared_ptr<frame_producer>& producer) override              {return producer_->leading_producer(producer);}\r
 201         uint32_t                                                                                        nb_frames() const override                                                                                                              {return producer_->nb_frames();}\r
 202         class draw_frame                                                                        last_frame() const                                                                                                                              {return producer_->last_frame();}\r
 203         void                                                                                            subscribe(const monitor::observable::observer_ptr& o)                                                   {return producer_->subscribe(o);}\r
 204         void                                                                                            unsubscribe(const monitor::observable::observer_ptr& o)                                                 {return producer_->unsubscribe(o);}\r
 205 };\r
 206 \r
 207 spl::shared_ptr<core::frame_producer> create_destroy_proxy(spl::shared_ptr<core::frame_producer> producer)\r
 208 {\r
 209         return spl::make_shared<destroy_producer_proxy>(std::move(producer));\r
 210 }\r
 211 \r
 212 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
 213 {\r
 214         if(params.empty())\r
 215                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 216         \r
 217         auto producer = frame_producer::empty();\r
 218         std::any_of(g_factories.begin(), g_factories.end(), [&](const producer_factory_t& factory) -> bool\r
 219                 {\r
 220                         try\r
 221                         {\r
 222                                 producer = factory(my_frame_factory, format_desc, params);\r
 223                         }\r
 224                         catch(...)\r
 225                         {\r
 226                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 227                         }\r
 228                         return producer != frame_producer::empty();\r
 229                 });\r
 230 \r
 231         if(producer == frame_producer::empty())\r
 232                 producer = create_color_producer(my_frame_factory, params);\r
 233 \r
 234         if(producer == frame_producer::empty())\r
 235                 return producer;\r
 236                 \r
 237         return create_destroy_proxy(producer);\r
 238 }\r
 239 \r
 240 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
 241 {       \r
 242         auto producer = do_create_producer(my_frame_factory, format_desc, params);\r
 243         auto key_producer = frame_producer::empty();\r
 244         \r
 245         try // to find a key file.\r
 246         {\r
 247                 auto params_copy = params;\r
 248                 if(params_copy.size() > 0)\r
 249                 {\r
 250                         params_copy[0] += L"_A";\r
 251                         key_producer = do_create_producer(my_frame_factory, format_desc, params_copy);                  \r
 252                         if(key_producer == frame_producer::empty())\r
 253                         {\r
 254                                 params_copy[0] += L"LPHA";\r
 255                                 key_producer = do_create_producer(my_frame_factory, format_desc, params_copy);  \r
 256                         }\r
 257                 }\r
 258         }\r
 259         catch(...){}\r
 260 \r
 261         if(producer != frame_producer::empty() && key_producer != frame_producer::empty())\r
 262                 return create_separated_producer(producer, key_producer);\r
 263         \r
 264         if(producer == frame_producer::empty())\r
 265         {\r
 266                 std::wstring str;\r
 267                 BOOST_FOREACH(auto& param, params)\r
 268                         str += param + L" ";\r
 269                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax.") << arg_value_info(u8(str)));\r
 270         }\r
 271 \r
 272         return producer;\r
 273 }\r
 274 \r
 275 \r
 276 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
 277 {\r
 278         std::wstringstream iss(params);\r
 279         std::vector<std::wstring> tokens;\r
 280         typedef std::istream_iterator<std::wstring, wchar_t, std::char_traits<wchar_t> > iterator;\r
 281         std::copy(iterator(iss),  iterator(), std::back_inserter(tokens));\r
 282         return create_producer(factory, format_desc, tokens);\r
 283 }\r
 284 \r
 285 }}