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