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([&]{layers_[index].load(make_safe<destroy_producer_proxy>(channel_.destruction(), producer), preview);});\r
 113         }\r
 114 \r
 115         void pause(int index)\r
 116         {               \r
 117                 channel_.execution().invoke([&]{layers_[index].pause();});\r
 118         }\r
 119 \r
 120         void play(int index)\r
 121         {               \r
 122                 channel_.execution().invoke([&]{layers_[index].play();});\r
 123         }\r
 124 \r
 125         void stop(int index)\r
 126         {               \r
 127                 channel_.execution().invoke([&]{layers_[index].stop();});\r
 128         }\r
 129 \r
 130         void clear(int index)\r
 131         {\r
 132                 channel_.execution().invoke([&]{layers_.erase(index);});\r
 133         }\r
 134                 \r
 135         void clear()\r
 136         {\r
 137                 channel_.execution().invoke([&]{layers_.clear();});\r
 138         }       \r
 139         \r
 140         void swap_layer(int index, size_t other_index)\r
 141         {\r
 142                 channel_.execution().invoke([&]{layers_[index].swap(layers_[other_index]);});\r
 143         }\r
 144 \r
 145         void swap_layer(int index, size_t other_index, stage& other)\r
 146         {\r
 147                 if(other.impl_.get() == this)\r
 148                         swap_layer(index, other_index);\r
 149                 else\r
 150                 {\r
 151                         if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc())\r
 152                                 BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between channels with different formats."));\r
 153 \r
 154                         auto func = [&]{layers_[index].swap(other.impl_->layers_[other_index]);};\r
 155                 \r
 156                         channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 157                 }\r
 158         }\r
 159 \r
 160         void swap(stage& other)\r
 161         {\r
 162                 if(other.impl_.get() == this)\r
 163                         return;\r
 164 \r
 165                 if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc())\r
 166                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between channels with different formats."));\r
 167 \r
 168                 auto func = [&]\r
 169                 {\r
 170                         auto sel_first = [](const std::pair<int, layer>& pair){return pair.first;};\r
 171 \r
 172                         std::set<int> indices;\r
 173                         auto inserter = std::inserter(indices, indices.begin());\r
 174 \r
 175                         std::transform(layers_.begin(), layers_.end(), inserter, sel_first);\r
 176                         std::transform(other.impl_->layers_.begin(), other.impl_->layers_.end(), inserter, sel_first);\r
 177 \r
 178                         BOOST_FOREACH(auto index, indices)\r
 179                                 layers_[index].swap(other.impl_->layers_[index]);\r
 180                 };\r
 181                 \r
 182                 channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 183         }\r
 184         \r
 185         boost::unique_future<safe_ptr<frame_producer>> foreground(int index)\r
 186         {\r
 187                 return channel_.execution().begin_invoke([=]{return layers_[index].foreground();});\r
 188         }\r
 189         \r
 190         boost::unique_future<safe_ptr<frame_producer>> background(int index)\r
 191         {\r
 192                 return channel_.execution().begin_invoke([=]{return layers_[index].background();});\r
 193         }\r
 194 };\r
 195 \r
 196 stage::stage(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 197 void stage::swap(stage& other){impl_->swap(other);}\r
 198 void stage::load(int index, const safe_ptr<frame_producer>& producer, bool preview){impl_->load(index, producer, preview);}\r
 199 void stage::pause(int index){impl_->pause(index);}\r
 200 void stage::play(int index){impl_->play(index);}\r
 201 void stage::stop(int index){impl_->stop(index);}\r
 202 void stage::clear(int index){impl_->clear(index);}\r
 203 void stage::clear(){impl_->clear();}\r
 204 void stage::swap_layer(int index, size_t other_index){impl_->swap_layer(index, other_index);}\r
 205 void stage::swap_layer(int index, size_t other_index, stage& other){impl_->swap_layer(index, other_index, other);}\r
 206 boost::unique_future<safe_ptr<frame_producer>> stage::foreground(size_t index) {return impl_->foreground(index);}\r
 207 boost::unique_future<safe_ptr<frame_producer>> stage::background(size_t index) {return impl_->background(index);}\r
 208 std::map<int, safe_ptr<basic_frame>> stage::execute(){return impl_->execute();}\r
 209 }}