git.sesse.net Git - casparcg/blob - core/producer/frame_producer_device.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 "frame_producer_device.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 frame_producer_device::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                 // Allocate placeholders.\r
  91                 BOOST_FOREACH(auto layer, layers_)\r
  92                         frames[layer.first] = basic_frame::empty();\r
  93 \r
  94                 // Render layers\r
  95                 tbb::parallel_for_each(layers_.begin(), layers_.end(), [&](layer_t& layer)\r
  96                 {\r
  97                         frames[layer.first] = layer.second.receive();\r
  98                 });\r
  99                 \r
 100                 return frames;\r
 101         }\r
 102 \r
 103         void load(int index, const safe_ptr<frame_producer>& producer, bool preview)\r
 104         {\r
 105                 channel_.execution().invoke([&]{layers_[index].load(make_safe<destroy_producer_proxy>(channel_.destruction(), producer), preview);});\r
 106         }\r
 107 \r
 108         void pause(int index)\r
 109         {               \r
 110                 channel_.execution().invoke([&]{layers_[index].pause();});\r
 111         }\r
 112 \r
 113         void play(int index)\r
 114         {               \r
 115                 channel_.execution().invoke([&]{layers_[index].play();});\r
 116         }\r
 117 \r
 118         void stop(int index)\r
 119         {               \r
 120                 channel_.execution().invoke([&]{layers_[index].stop();});\r
 121         }\r
 122 \r
 123         void clear(int index)\r
 124         {\r
 125                 channel_.execution().invoke([&]{layers_.erase(index);});\r
 126         }\r
 127                 \r
 128         void clear()\r
 129         {\r
 130                 channel_.execution().invoke([&]{layers_.clear();});\r
 131         }       \r
 132         \r
 133         void swap_layer(int index, size_t other_index)\r
 134         {\r
 135                 channel_.execution().invoke([&]{layers_[index].swap(layers_[other_index]);});\r
 136         }\r
 137 \r
 138         void swap_layer(int index, size_t other_index, frame_producer_device& other)\r
 139         {\r
 140                 if(other.impl_.get() == this)\r
 141                         swap_layer(index, other_index);\r
 142                 else\r
 143                 {\r
 144                         if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc())\r
 145                                 BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between channels with different formats."));\r
 146 \r
 147                         auto func = [&]{layers_[index].swap(other.impl_->layers_[other_index]);};\r
 148                 \r
 149                         channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 150                 }\r
 151         }\r
 152 \r
 153         void swap(frame_producer_device& other)\r
 154         {\r
 155                 if(other.impl_.get() == this)\r
 156                         return;\r
 157 \r
 158                 if(channel_.get_format_desc() != other.impl_->channel_.get_format_desc())\r
 159                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Cannot swap between channels with different formats."));\r
 160 \r
 161                 auto func = [&]\r
 162                 {\r
 163                         auto sel_first = [](const std::pair<int, layer>& pair){return pair.first;};\r
 164 \r
 165                         std::set<int> indices;\r
 166                         auto inserter = std::inserter(indices, indices.begin());\r
 167 \r
 168                         std::transform(layers_.begin(), layers_.end(), inserter, sel_first);\r
 169                         std::transform(other.impl_->layers_.begin(), other.impl_->layers_.end(), inserter, sel_first);\r
 170 \r
 171                         BOOST_FOREACH(auto index, indices)\r
 172                                 layers_[index].swap(other.impl_->layers_[index]);\r
 173                 };\r
 174                 \r
 175                 channel_.execution().invoke([&]{other.impl_->channel_.execution().invoke(func);});\r
 176         }\r
 177         \r
 178         boost::unique_future<safe_ptr<frame_producer>> foreground(int index)\r
 179         {\r
 180                 return channel_.execution().begin_invoke([=]{return layers_[index].foreground();});\r
 181         }\r
 182         \r
 183         boost::unique_future<safe_ptr<frame_producer>> background(int index)\r
 184         {\r
 185                 return channel_.execution().begin_invoke([=]{return layers_[index].background();});\r
 186         }\r
 187 };\r
 188 \r
 189 frame_producer_device::frame_producer_device(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 190 void frame_producer_device::swap(frame_producer_device& other){impl_->swap(other);}\r
 191 void frame_producer_device::load(int index, const safe_ptr<frame_producer>& producer, bool preview){impl_->load(index, producer, preview);}\r
 192 void frame_producer_device::pause(int index){impl_->pause(index);}\r
 193 void frame_producer_device::play(int index){impl_->play(index);}\r
 194 void frame_producer_device::stop(int index){impl_->stop(index);}\r
 195 void frame_producer_device::clear(int index){impl_->clear(index);}\r
 196 void frame_producer_device::clear(){impl_->clear();}\r
 197 void frame_producer_device::swap_layer(int index, size_t other_index){impl_->swap_layer(index, other_index);}\r
 198 void frame_producer_device::swap_layer(int index, size_t other_index, frame_producer_device& other){impl_->swap_layer(index, other_index, other);}\r
 199 boost::unique_future<safe_ptr<frame_producer>> frame_producer_device::foreground(size_t index) {return impl_->foreground(index);}\r
 200 boost::unique_future<safe_ptr<frame_producer>> frame_producer_device::background(size_t index) {return impl_->background(index);}\r
 201 std::map<int, safe_ptr<basic_frame>> frame_producer_device::execute(){return impl_->execute();}\r
 202 }}