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/frame.h"\r
  34 \r
  35 #include <common/assert.h>\r
  36 #include <common/future.h>\r
  37 #include <common/executor.h>\r
  38 #include <common/diagnostics/graph.h>\r
  39 #include <common/prec_timer.h>\r
  40 #include <common/memshfl.h>\r
  41 #include <common/env.h>\r
  42 \r
  43 #include <boost/circular_buffer.hpp>\r
  44 #include <boost/lexical_cast.hpp>\r
  45 #include <boost/property_tree/ptree.hpp>\r
  46 #include <boost/range/algorithm.hpp>\r
  47 #include <boost/range/adaptors.hpp>\r
  48 #include <boost/timer.hpp>\r
  49 \r
  50 namespace caspar { namespace core {\r
  51         \r
  52 struct output::impl\r
  53 {               \r
  54         spl::shared_ptr<diagnostics::graph>                             graph_;\r
  55         const int                                                                               channel_index_;\r
  56         video_format_desc                                                               format_desc_;\r
  57         std::map<int, spl::shared_ptr<frame_consumer>>  consumers_;     \r
  58         prec_timer                                                                              sync_timer_;\r
  59         boost::circular_buffer<const_frame>             frames_;\r
  60         executor                                                                                executor_;              \r
  61 public:\r
  62         impl(spl::shared_ptr<diagnostics::graph> graph, const video_format_desc& format_desc, int channel_index) \r
  63                 : graph_(std::move(graph))\r
  64                 , channel_index_(channel_index)\r
  65                 , format_desc_(format_desc)\r
  66                 , executor_(L"output")\r
  67         {\r
  68                 graph_->set_color("consume-time", diagnostics::color(1.0f, 0.4f, 0.0f, 0.8));\r
  69         }       \r
  70         \r
  71         void add(int index, spl::shared_ptr<frame_consumer> consumer)\r
  72         {               \r
  73                 remove(index);\r
  74 \r
  75                 consumer->initialize(format_desc_, channel_index_);\r
  76 \r
  77                 executor_.begin_invoke([=]\r
  78                 {\r
  79                         consumers_.insert(std::make_pair(index, consumer));\r
  80                         CASPAR_LOG(info) << print() << L" " << consumer->print() << L" Added.";\r
  81                 }, task_priority::high_priority);\r
  82         }\r
  83 \r
  84         void add(const spl::shared_ptr<frame_consumer>& consumer)\r
  85         {\r
  86                 add(consumer->index(), consumer);\r
  87         }\r
  88 \r
  89         void remove(int index)\r
  90         {               \r
  91                 executor_.begin_invoke([=]\r
  92                 {\r
  93                         auto it = consumers_.find(index);\r
  94                         if(it != consumers_.end())\r
  95                                 consumers_.erase(it);                                   \r
  96                 }, task_priority::high_priority);\r
  97         }\r
  98 \r
  99         void remove(const spl::shared_ptr<frame_consumer>& consumer)\r
 100         {\r
 101                 remove(consumer->index());\r
 102         }\r
 103         \r
 104         void video_format_desc(const core::video_format_desc& format_desc)\r
 105         {\r
 106                 executor_.invoke([&]\r
 107                 {\r
 108                         if(format_desc_ == format_desc)\r
 109                                 return;\r
 110 \r
 111                         auto it = consumers_.begin();\r
 112                         while(it != consumers_.end())\r
 113                         {                                               \r
 114                                 try\r
 115                                 {\r
 116                                         it->second->initialize(format_desc, channel_index_);\r
 117                                         ++it;\r
 118                                 }\r
 119                                 catch(...)\r
 120                                 {\r
 121                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 122                                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 123                                         consumers_.erase(it++);\r
 124                                 }\r
 125                         }\r
 126                         \r
 127                         format_desc_ = format_desc;\r
 128                         frames_.clear();\r
 129                 });\r
 130         }\r
 131 \r
 132         std::pair<int, int> minmax_buffer_depth() const\r
 133         {               \r
 134                 if(consumers_.empty())\r
 135                         return std::make_pair(0, 0);\r
 136                 \r
 137                 auto buffer_depths = consumers_ | \r
 138                                                          boost::adaptors::map_values | // std::function is MSVC workaround\r
 139                                                          boost::adaptors::transformed(std::function<int(const spl::shared_ptr<frame_consumer>&)>([](const spl::shared_ptr<frame_consumer>& x){return x->buffer_depth();})); \r
 140                 \r
 141 \r
 142                 return std::make_pair(*boost::range::min_element(buffer_depths), *boost::range::max_element(buffer_depths));\r
 143         }\r
 144 \r
 145         bool has_synchronization_clock() const\r
 146         {\r
 147                 return boost::range::count_if(consumers_ | boost::adaptors::map_values, [](const spl::shared_ptr<frame_consumer>& x){return x->has_synchronization_clock();}) > 0;\r
 148         }\r
 149                 \r
 150         void operator()(const_frame input_frame, const core::video_format_desc& format_desc)\r
 151         {\r
 152                 video_format_desc(format_desc);\r
 153 \r
 154                 executor_.invoke([=]\r
 155                 {                       \r
 156                         boost::timer frame_timer;\r
 157 \r
 158                         if(!has_synchronization_clock())\r
 159                                 sync_timer_.tick(1.0/format_desc_.fps);\r
 160                                 \r
 161                         if(input_frame.size() != format_desc_.size)\r
 162                         {\r
 163                                 sync_timer_.tick(1.0/format_desc_.fps);\r
 164                                 return;\r
 165                         }\r
 166                                         \r
 167                         auto minmax = minmax_buffer_depth();\r
 168 \r
 169                         frames_.set_capacity(std::max(2, minmax.second - minmax.first) + 1); // std::max(2, x) since we want to guarantee some pipeline depth for asycnhronous mixer read-back.\r
 170                         frames_.push_back(input_frame);\r
 171 \r
 172                         if(!frames_.full())\r
 173                                 return;\r
 174 \r
 175                         for(auto it = consumers_.begin(); it != consumers_.end();)\r
 176                         {\r
 177                                 auto consumer   = it->second;\r
 178                                 auto frame              = frames_.at(consumer->buffer_depth()-minmax.first);\r
 179                                                 \r
 180                                 if(consumer->send(frame))\r
 181                                         ++it;\r
 182                                 else\r
 183                                 {\r
 184                                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 185                                         consumers_.erase(it++);\r
 186                                 }\r
 187                         }\r
 188 \r
 189                         graph_->set_value("consume-time", frame_timer.elapsed()*format_desc.fps*0.5);\r
 190                 });\r
 191         }\r
 192 \r
 193         std::wstring print() const\r
 194         {\r
 195                 return L"output[" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";\r
 196         }\r
 197 \r
 198         boost::unique_future<boost::property_tree::wptree> info()\r
 199         {\r
 200                 return std::move(executor_.begin_invoke([&]() -> boost::property_tree::wptree\r
 201                 {                       \r
 202                         boost::property_tree::wptree info;\r
 203                         BOOST_FOREACH(auto& consumer, consumers_)\r
 204                         {\r
 205                                 info.add_child(L"consumers.consumer", consumer.second->info())\r
 206                                         .add(L"index", consumer.first); \r
 207                         }\r
 208                         return info;\r
 209                 }, task_priority::high_priority));\r
 210         }\r
 211 };\r
 212 \r
 213 output::output(spl::shared_ptr<diagnostics::graph> graph, const video_format_desc& format_desc, int channel_index) : impl_(new impl(std::move(graph), format_desc, channel_index)){}\r
 214 void output::add(int index, const spl::shared_ptr<frame_consumer>& consumer){impl_->add(index, consumer);}\r
 215 void output::add(const spl::shared_ptr<frame_consumer>& consumer){impl_->add(consumer);}\r
 216 void output::remove(int index){impl_->remove(index);}\r
 217 void output::remove(const spl::shared_ptr<frame_consumer>& consumer){impl_->remove(consumer);}\r
 218 boost::unique_future<boost::property_tree::wptree> output::info() const{return impl_->info();}\r
 219 void output::operator()(const_frame frame, const video_format_desc& format_desc){(*impl_)(std::move(frame), format_desc);}\r
 220 }}