git.sesse.net Git - casparcg/blob - core/producer/stage.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 "stage.h"\r
  24 \r
  25 #include "../video_channel_context.h"\r
  26 \r
  27 #include "layer.h"\r
  28 \r
  29 #include <core/producer/frame/basic_frame.h>\r
  30 #include <core/producer/frame/frame_factory.h>\r
  31 \r
  32 #include <common/concurrency/executor.h>\r
  33 \r
  34 #include <boost/range/algorithm.hpp>\r
  35 \r
  36 #include <tbb/parallel_for.h>\r
  37 \r
  38 #include <map>\r
  39 \r
  40 namespace caspar { namespace core {\r
  41                 \r
  42 void destroy_producer(safe_ptr<frame_producer>& producer)\r
  43 {\r
  44         if(!producer.unique())\r
  45                 CASPAR_LOG(warning) << producer->print() << L" Not destroyed on safe asynchronous destruction thread.";\r
  46                 \r
  47         producer = frame_producer::empty();\r
  48 }\r
  49 \r
  50 class destroy_producer_proxy : public frame_producer\r
  51 {\r
  52         safe_ptr<frame_producer> producer_;\r
  53         executor& destroy_context_;\r
  54 public:\r
  55         destroy_producer_proxy(executor& destroy_context, const safe_ptr<frame_producer>& producer) \r
  56                 : producer_(producer)\r
  57                 , destroy_context_(destroy_context){}\r
  58 \r
  59         ~destroy_producer_proxy()\r
  60         {               \r
  61                 if(destroy_context_.size() > 4)\r
  62                         CASPAR_LOG(error) << L" Potential destroyer deadlock.";\r
  63 \r
  64                 destroy_context_.begin_invoke(std::bind(&destroy_producer, std::move(producer_)));\r
  65         }\r
  66 \r
  67         virtual safe_ptr<basic_frame>           receive()                                                                                                               {return producer_->receive();}\r
  68         virtual safe_ptr<basic_frame>           last_frame() const                                                                                              {return producer_->last_frame();}\r
  69         virtual std::wstring                            print() const                                                                                                   {return producer_->print();}\r
  70         virtual void                                            param(const std::wstring& str)                                                                  {producer_->param(str);}\r
  71         virtual safe_ptr<frame_producer>        get_following_producer() const                                                                  {return producer_->get_following_producer();}\r
  72         virtual void                                            set_leading_producer(const safe_ptr<frame_producer>& producer)  {producer_->set_leading_producer(producer);}\r
  73         virtual int64_t                                         nb_frames() const                                                                                               {return producer_->nb_frames();}\r
  74 };\r
  75 \r
  76 struct stage::implementation : boost::noncopyable\r
  77 {               \r
  78         std::map<int, layer>                                            layers_;                \r
  79         typedef std::map<int, layer>::value_type        layer_t;\r
  80                 \r
  81         video_channel_context&                                          channel_;\r
  82 public:\r
  83         implementation(video_channel_context& video_channel)  \r
  84                 : channel_(video_channel)\r
  85         {\r
  86         }\r
  87                                                 \r
  88         std::map<int, safe_ptr<basic_frame>> execute()\r
  89         {                       \r
  90                 std::map<int, safe_ptr<basic_frame>> frames;\r
  91 \r
  92                 try\r
  93                 {\r
  94                         // Allocate placeholders.\r
  95                         BOOST_FOREACH(auto layer, layers_)\r
  96                                 frames[layer.first] = basic_frame::empty();\r
  97 \r
  98                         // Render layers\r
  99                         tbb::parallel_for_each(layers_.begin(), layers_.end(), [&](layer_t& layer)\r
 100                         {\r
 101                                 frames[layer.first] = layer.second.receive();\r
 102                         });\r
 103                 }\r
 104                 catch(...)\r
 105                 {\r
 106                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 107                 }\r
 108                 \r
 109                 return frames;\r
 110         }\r
 111 \r
 112         void load(int index, const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
 113         {\r
 114                 channel_.execution().invoke([&]\r
 115                 {\r
 116                         layers_[index].load(make_safe<destroy_producer_proxy>(channel_.destruction(), producer), preview, auto_play_delta);\r
 117                 });\r
 118         }\r
 119 \r
 120         void pause(int index)\r
 121         {               \r
 122                 channel_.execution().invoke([&]\r
 123                 {\r
 124                         layers_[index].pause();\r
 125                 });\r
 126         }\r
 127 \r
 128         void play(int index)\r
 129         {               \r
 130                 channel_.execution().invoke([&]\r
 131                 {\r
 132                         layers_[index].play();\r
 133                 });\r
 134         }\r
 135 \r
 136         void stop(int index)\r
 137         {               \r
 138                 channel_.execution().invoke([&]\r
 139                 {\r
 140                         layers_[index].stop();\r
 141                 });\r
 142         }\r
 143 \r
 144         void clear(int index)\r
 145         {\r
 146                 channel_.execution().invoke([&]\r
 147                 {\r
 148                         layers_.erase(index);\r
 149                 });\r
 150         }\r
 151                 \r
 152         void clear()\r
 153         {\r
 154                 channel_.execution().invoke([&]\r
 155                 {\r
 156                         layers_.clear();\r
 157                 });\r
 158         }       \r
 159         \r
 160         void swap_layer(int index, size_t other_index)\r
 161         {\r
 162                 channel_.execution().invoke([&]\r
 163                 {\r
 164                         layers_[index].swap(layers_[other_index]);\r
 165                 });\r
 166         }\r
 167 \r
 168         void swap_layer(int index, size_t other_index, stage& other)\r
 169         {\r
 170                 if(other.impl_.get() == this)\r
 171                         swap_layer(index, other_index);\r
 172                 else\r
 173                 {\r
 174                         if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc() || &channel_.ogl() != &other.impl_->channel_.ogl())\r
 175                                 BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between incompatible channels."));\r
 176 \r
 177                         auto func = [&]{layers_[index].swap(other.impl_->layers_[other_index]);};\r
 178                 \r
 179                         channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 180                 }\r
 181         }\r
 182 \r
 183         void swap(stage& other)\r
 184         {\r
 185                 if(other.impl_.get() == this)\r
 186                         return;\r
 187                 \r
 188                 if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc() || &channel_.ogl() != &other.impl_->channel_.ogl())\r
 189                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between incompatible channels."));\r
 190 \r
 191                 auto func = [&]\r
 192                 {\r
 193                         auto sel_first = [](const std::pair<int, layer>& pair){return pair.first;};\r
 194 \r
 195                         std::set<int> indices;\r
 196                         auto inserter = std::inserter(indices, indices.begin());\r
 197 \r
 198                         std::transform(layers_.begin(), layers_.end(), inserter, sel_first);\r
 199                         std::transform(other.impl_->layers_.begin(), other.impl_->layers_.end(), inserter, sel_first);\r
 200 \r
 201                         BOOST_FOREACH(auto index, indices)\r
 202                                 layers_[index].swap(other.impl_->layers_[index]);\r
 203                 };\r
 204                 \r
 205                 channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 206         }\r
 207         \r
 208         boost::unique_future<safe_ptr<frame_producer>> foreground(int index)\r
 209         {\r
 210                 return channel_.execution().begin_invoke([=]{return layers_[index].foreground();});\r
 211         }\r
 212         \r
 213         boost::unique_future<safe_ptr<frame_producer>> background(int index)\r
 214         {\r
 215                 return channel_.execution().begin_invoke([=]{return layers_[index].background();});\r
 216         }\r
 217 \r
 218         std::wstring print() const\r
 219         {\r
 220                 return L"stage [" + boost::lexical_cast<std::wstring>(channel_.index()) + L"]";\r
 221         }\r
 222 \r
 223 };\r
 224 \r
 225 stage::stage(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 226 void stage::swap(stage& other){impl_->swap(other);}\r
 227 void stage::load(int index, const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta){impl_->load(index, producer, preview, auto_play_delta);}\r
 228 void stage::pause(int index){impl_->pause(index);}\r
 229 void stage::play(int index){impl_->play(index);}\r
 230 void stage::stop(int index){impl_->stop(index);}\r
 231 void stage::clear(int index){impl_->clear(index);}\r
 232 void stage::clear(){impl_->clear();}\r
 233 void stage::swap_layer(int index, size_t other_index){impl_->swap_layer(index, other_index);}\r
 234 void stage::swap_layer(int index, size_t other_index, stage& other){impl_->swap_layer(index, other_index, other);}\r
 235 boost::unique_future<safe_ptr<frame_producer>> stage::foreground(size_t index) {return impl_->foreground(index);}\r
 236 boost::unique_future<safe_ptr<frame_producer>> stage::background(size_t index) {return impl_->background(index);}\r
 237 std::map<int, safe_ptr<basic_frame>> stage::execute(){return impl_->execute();}\r
 238 }}