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