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