git.sesse.net Git - casparcg/blob - core/consumer/output.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../StdAfx.h"\r
  23 \r
  24 #ifdef _MSC_VER\r
  25 #pragma warning (disable : 4244)\r
  26 #endif\r
  27 \r
  28 #include "output.h"\r
  29 \r
  30 #include "frame_consumer.h"\r
  31 \r
  32 #include "../video_format.h"\r
  33 #include "../frame/data_frame.h"\r
  34 \r
  35 #include <common/concurrency/executor.h>\r
  36 #include <common/diagnostics/graph.h>\r
  37 #include <common/prec_timer.h>\r
  38 #include <common/memory/memshfl.h>\r
  39 #include <common/env.h>\r
  40 \r
  41 #include <common/assert.h>\r
  42 #include <boost/circular_buffer.hpp>\r
  43 #include <boost/timer.hpp>\r
  44 #include <boost/range/algorithm.hpp>\r
  45 #include <boost/range/adaptors.hpp>\r
  46 #include <boost/property_tree/ptree.hpp>\r
  47 \r
  48 namespace caspar { namespace core {\r
  49         \r
  50 struct output::impl\r
  51 {               \r
  52         const int                                                                                       channel_index_;\r
  53         video_format_desc                                                                       format_desc_;\r
  54         std::map<int, safe_ptr<frame_consumer>>                         consumers_;     \r
  55         prec_timer                                                                                      sync_timer_;\r
  56         boost::circular_buffer<safe_ptr<const data_frame>>      frames_;\r
  57 \r
  58         executor                                                                                        executor_;              \r
  59 public:\r
  60         impl(const video_format_desc& format_desc, int channel_index) \r
  61                 : channel_index_(channel_index)\r
  62                 , format_desc_(format_desc)\r
  63                 , executor_(L"output")\r
  64         {\r
  65         }       \r
  66         \r
  67         void add(int index, safe_ptr<frame_consumer> consumer)\r
  68         {               \r
  69                 remove(index);\r
  70 \r
  71                 consumer = create_consumer_cadence_guard(consumer);\r
  72                 consumer->initialize(format_desc_, channel_index_);\r
  73 \r
  74                 executor_.invoke([&]\r
  75                 {\r
  76                         consumers_.insert(std::make_pair(index, consumer));\r
  77                         CASPAR_LOG(info) << print() << L" " << consumer->print() << L" Added.";\r
  78                 }, task_priority::high_priority);\r
  79         }\r
  80 \r
  81         void add(const safe_ptr<frame_consumer>& consumer)\r
  82         {\r
  83                 add(consumer->index(), consumer);\r
  84         }\r
  85 \r
  86         void remove(int index)\r
  87         {               \r
  88                 // Destroy  consumer on calling thread:\r
  89                 std::shared_ptr<frame_consumer> old_consumer;\r
  90 \r
  91                 executor_.invoke([&]\r
  92                 {\r
  93                         auto it = consumers_.find(index);\r
  94                         if(it != consumers_.end())\r
  95                         {\r
  96                                 old_consumer = it->second;\r
  97                                 consumers_.erase(it);\r
  98                         }\r
  99                 }, task_priority::high_priority);\r
 100 \r
 101                 if(old_consumer)\r
 102                 {\r
 103                         auto str = old_consumer->print();\r
 104                         old_consumer.reset();\r
 105                         CASPAR_LOG(info) << print() << L" " << str << L" Removed.";\r
 106                 }\r
 107         }\r
 108 \r
 109         void remove(const safe_ptr<frame_consumer>& consumer)\r
 110         {\r
 111                 remove(consumer->index());\r
 112         }\r
 113         \r
 114         void set_video_format_desc(const video_format_desc& format_desc)\r
 115         {\r
 116                 executor_.invoke([&]\r
 117                 {\r
 118                         auto it = consumers_.begin();\r
 119                         while(it != consumers_.end())\r
 120                         {                                               \r
 121                                 try\r
 122                                 {\r
 123                                         it->second->initialize(format_desc, channel_index_);\r
 124                                         ++it;\r
 125                                 }\r
 126                                 catch(...)\r
 127                                 {\r
 128                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 129                                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 130                                         consumers_.erase(it++);\r
 131                                 }\r
 132                         }\r
 133                         \r
 134                         format_desc_ = format_desc;\r
 135                         frames_.clear();\r
 136                 });\r
 137         }\r
 138 \r
 139         std::pair<int, int> minmax_buffer_depth() const\r
 140         {               \r
 141                 if(consumers_.empty())\r
 142                         return std::make_pair(0, 0);\r
 143                 \r
 144                 auto buffer_depths = consumers_ | \r
 145                                                          boost::adaptors::map_values | // std::function is MSVC workaround\r
 146                                                          boost::adaptors::transformed(std::function<int(const safe_ptr<frame_consumer>&)>([](const safe_ptr<frame_consumer>& x){return x->buffer_depth();})); \r
 147                 \r
 148 \r
 149                 return std::make_pair(*boost::range::min_element(buffer_depths), *boost::range::max_element(buffer_depths));\r
 150         }\r
 151 \r
 152         bool has_synchronization_clock() const\r
 153         {\r
 154                 return boost::range::count_if(consumers_ | boost::adaptors::map_values, [](const safe_ptr<frame_consumer>& x){return x->has_synchronization_clock();}) > 0;\r
 155         }\r
 156                 \r
 157         void operator()(safe_ptr<const data_frame> input_frame, const video_format_desc& format_desc)\r
 158         {\r
 159                 executor_.invoke([=]\r
 160                 {\r
 161                         try\r
 162                         {                               \r
 163                                 if(!has_synchronization_clock())\r
 164                                         sync_timer_.tick(1.0/format_desc_.fps);\r
 165                                 \r
 166                                 if(format_desc_ != format_desc)\r
 167                                         set_video_format_desc(format_desc);\r
 168 \r
 169                                 if(input_frame->image_data().size() != format_desc_.size)\r
 170                                 {\r
 171                                         sync_timer_.tick(1.0/format_desc_.fps);\r
 172                                         return;\r
 173                                 }\r
 174                                         \r
 175                                 auto minmax = minmax_buffer_depth();\r
 176 \r
 177                                 frames_.set_capacity(minmax.second - minmax.first + 1);\r
 178                                 frames_.push_back(input_frame);\r
 179 \r
 180                                 if(!frames_.full())\r
 181                                         return;\r
 182 \r
 183                                 auto it = consumers_.begin();\r
 184                                 while(it != consumers_.end())\r
 185                                 {\r
 186                                         auto consumer   = it->second;\r
 187                                         auto frame              = frames_.at(consumer->buffer_depth()-minmax.first);\r
 188                                                 \r
 189                                         try\r
 190                                         {\r
 191                                                 if(consumer->send(frame))\r
 192                                                         ++it;\r
 193                                                 else\r
 194                                                 {\r
 195                                                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 196                                                         consumers_.erase(it++);\r
 197                                                 }\r
 198                                         }\r
 199                                         catch(...)\r
 200                                         {\r
 201                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 202                                                 try\r
 203                                                 {\r
 204                                                         consumer->initialize(format_desc_, channel_index_);\r
 205                                                         if(consumer->send(frame))\r
 206                                                                 ++it;\r
 207                                                         else\r
 208                                                         {\r
 209                                                                 CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 210                                                                 consumers_.erase(it++);\r
 211                                                         }\r
 212                                                 }\r
 213                                                 catch(...)\r
 214                                                 {\r
 215                                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 216                                                         CASPAR_LOG(error) << "Failed to recover consumer: " << consumer->print() << L". Removing it.";\r
 217                                                         consumers_.erase(it++);\r
 218                                                 }\r
 219                                         }\r
 220                                 }\r
 221                         }\r
 222                         catch(...)\r
 223                         {\r
 224                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 225                         }\r
 226                 });\r
 227         }\r
 228 \r
 229         std::wstring print() const\r
 230         {\r
 231                 return L"output[" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";\r
 232         }\r
 233 \r
 234         boost::unique_future<boost::property_tree::wptree> info()\r
 235         {\r
 236                 return std::move(executor_.begin_invoke([&]() -> boost::property_tree::wptree\r
 237                 {                       \r
 238                         boost::property_tree::wptree info;\r
 239                         BOOST_FOREACH(auto& consumer, consumers_)\r
 240                         {\r
 241                                 info.add_child(L"consumers.consumer", consumer.second->info())\r
 242                                         .add(L"index", consumer.first); \r
 243                         }\r
 244                         return info;\r
 245                 }, task_priority::high_priority));\r
 246         }\r
 247 };\r
 248 \r
 249 output::output(const video_format_desc& format_desc, int channel_index) : impl_(new impl(format_desc, channel_index)){}\r
 250 void output::add(int index, const safe_ptr<frame_consumer>& consumer){impl_->add(index, consumer);}\r
 251 void output::add(const safe_ptr<frame_consumer>& consumer){impl_->add(consumer);}\r
 252 void output::remove(int index){impl_->remove(index);}\r
 253 void output::remove(const safe_ptr<frame_consumer>& consumer){impl_->remove(consumer);}\r
 254 boost::unique_future<boost::property_tree::wptree> output::info() const{return impl_->info();}\r
 255 void output::operator()(safe_ptr<const data_frame> frame, const video_format_desc& format_desc){(*impl_)(std::move(frame), format_desc);}\r
 256 }}