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 core::receive(producer_);}\r
  68         virtual std::wstring                            print() const                                                                                                   {return producer_->print();}\r
  69         virtual void                                            param(const std::wstring& str)                                                                  {producer_->param(str);}\r
  70         virtual safe_ptr<frame_producer>        get_following_producer() const                                                                  {return producer_->get_following_producer();}\r
  71         virtual void                                            set_leading_producer(const safe_ptr<frame_producer>& producer)  {producer_->set_leading_producer(producer);}\r
  72 };\r
  73 \r
  74 struct stage::implementation : boost::noncopyable\r
  75 {               \r
  76         std::map<int, layer>                                            layers_;                \r
  77         typedef std::map<int, layer>::value_type        layer_t;\r
  78                 \r
  79         video_channel_context&                                          channel_;\r
  80 public:\r
  81         implementation(video_channel_context& video_channel)  \r
  82                 : channel_(video_channel)\r
  83         {\r
  84         }\r
  85                                                 \r
  86         std::map<int, safe_ptr<basic_frame>> execute()\r
  87         {                       \r
  88                 std::map<int, safe_ptr<basic_frame>> frames;\r
  89 \r
  90                 try\r
  91                 {\r
  92                         // Allocate placeholders.\r
  93                         BOOST_FOREACH(auto layer, layers_)\r
  94                                 frames[layer.first] = basic_frame::empty();\r
  95 \r
  96                         // Render layers\r
  97                         tbb::parallel_for_each(layers_.begin(), layers_.end(), [&](layer_t& layer)\r
  98                         {\r
  99                                 frames[layer.first] = layer.second.receive();\r
 100                         });\r
 101                 }\r
 102                 catch(...)\r
 103                 {\r
 104                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 105                 }\r
 106                 \r
 107                 return frames;\r
 108         }\r
 109 \r
 110         void load(int index, const safe_ptr<frame_producer>& producer, bool preview)\r
 111         {\r
 112                 channel_.execution().invoke([&]\r
 113                 {\r
 114                         layers_[index].load(make_safe<destroy_producer_proxy>(channel_.destruction(), producer), preview);\r
 115                         CASPAR_LOG(info) << print() << " layer [ " << index <<  "] Loaded: " << producer << ".";\r
 116                 });\r
 117         }\r
 118 \r
 119         void pause(int index)\r
 120         {               \r
 121                 channel_.execution().invoke([&]\r
 122                 {\r
 123                         layers_[index].pause();\r
 124                         CASPAR_LOG(info) << print() << " layer [ " << index <<  "] Paused.";\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                         CASPAR_LOG(info) << print() << " layer [ " << index <<  "] Playing.";\r
 134                 });\r
 135         }\r
 136 \r
 137         void stop(int index)\r
 138         {               \r
 139                 channel_.execution().invoke([&]\r
 140                 {\r
 141                         layers_[index].stop();\r
 142                         CASPAR_LOG(info) << print() << " layer [ " << index <<  "] Stopped.";\r
 143                 });\r
 144         }\r
 145 \r
 146         void clear(int index)\r
 147         {\r
 148                 channel_.execution().invoke([&]\r
 149                 {\r
 150                         layers_.erase(index);\r
 151                         CASPAR_LOG(info) << print() << " layer [ " << index <<  "] Cleared.";\r
 152                 });\r
 153         }\r
 154                 \r
 155         void clear()\r
 156         {\r
 157                 channel_.execution().invoke([&]\r
 158                 {\r
 159                         layers_.clear();\r
 160                         CASPAR_LOG(info) << print() << " Cleared.";\r
 161                 });\r
 162         }       \r
 163         \r
 164         void swap_layer(int index, size_t other_index)\r
 165         {\r
 166                 channel_.execution().invoke([&]\r
 167                 {\r
 168                         layers_[index].swap(layers_[other_index]);\r
 169                 });\r
 170         }\r
 171 \r
 172         void swap_layer(int index, size_t other_index, stage& other)\r
 173         {\r
 174                 if(other.impl_.get() == this)\r
 175                         swap_layer(index, other_index);\r
 176                 else\r
 177                 {\r
 178                         if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc())\r
 179                                 BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between channels with different formats."));\r
 180 \r
 181                         auto func = [&]{layers_[index].swap(other.impl_->layers_[other_index]);};\r
 182                 \r
 183                         channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 184                 }\r
 185         }\r
 186 \r
 187         void swap(stage& other)\r
 188         {\r
 189                 if(other.impl_.get() == this)\r
 190                         return;\r
 191 \r
 192                 if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc())\r
 193                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between channels with different formats."));\r
 194 \r
 195                 auto func = [&]\r
 196                 {\r
 197                         auto sel_first = [](const std::pair<int, layer>& pair){return pair.first;};\r
 198 \r
 199                         std::set<int> indices;\r
 200                         auto inserter = std::inserter(indices, indices.begin());\r
 201 \r
 202                         std::transform(layers_.begin(), layers_.end(), inserter, sel_first);\r
 203                         std::transform(other.impl_->layers_.begin(), other.impl_->layers_.end(), inserter, sel_first);\r
 204 \r
 205                         BOOST_FOREACH(auto index, indices)\r
 206                                 layers_[index].swap(other.impl_->layers_[index]);\r
 207                 };\r
 208                 \r
 209                 channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 210         }\r
 211         \r
 212         boost::unique_future<safe_ptr<frame_producer>> foreground(int index)\r
 213         {\r
 214                 return channel_.execution().begin_invoke([=]{return layers_[index].foreground();});\r
 215         }\r
 216         \r
 217         boost::unique_future<safe_ptr<frame_producer>> background(int index)\r
 218         {\r
 219                 return channel_.execution().begin_invoke([=]{return layers_[index].background();});\r
 220         }\r
 221 \r
 222         std::wstring print() const\r
 223         {\r
 224                 return L"stage [" + boost::lexical_cast<std::wstring>(channel_.index()) + L"]";\r
 225         }\r
 226 \r
 227 };\r
 228 \r
 229 stage::stage(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 230 void stage::swap(stage& other){impl_->swap(other);}\r
 231 void stage::load(int index, const safe_ptr<frame_producer>& producer, bool preview){impl_->load(index, producer, preview);}\r
 232 void stage::pause(int index){impl_->pause(index);}\r
 233 void stage::play(int index){impl_->play(index);}\r
 234 void stage::stop(int index){impl_->stop(index);}\r
 235 void stage::clear(int index){impl_->clear(index);}\r
 236 void stage::clear(){impl_->clear();}\r
 237 void stage::swap_layer(int index, size_t other_index){impl_->swap_layer(index, other_index);}\r
 238 void stage::swap_layer(int index, size_t other_index, stage& other){impl_->swap_layer(index, other_index, other);}\r
 239 boost::unique_future<safe_ptr<frame_producer>> stage::foreground(size_t index) {return impl_->foreground(index);}\r
 240 boost::unique_future<safe_ptr<frame_producer>> stage::background(size_t index) {return impl_->background(index);}\r
 241 std::map<int, safe_ptr<basic_frame>> stage::execute(){return impl_->execute();}\r
 242 }}