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 #include "port.h"\r
  32 \r
  33 #include "../video_format.h"\r
  34 #include "../frame/frame.h"\r
  35 \r
  36 #include <common/assert.h>\r
  37 #include <common/future.h>\r
  38 #include <common/executor.h>\r
  39 #include <common/diagnostics/graph.h>\r
  40 #include <common/prec_timer.h>\r
  41 #include <common/memshfl.h>\r
  42 #include <common/env.h>\r
  43 \r
  44 #include <boost/circular_buffer.hpp>\r
  45 #include <boost/lexical_cast.hpp>\r
  46 #include <boost/property_tree/ptree.hpp>\r
  47 #include <boost/range/algorithm.hpp>\r
  48 #include <boost/range/adaptors.hpp>\r
  49 #include <boost/timer.hpp>\r
  50 \r
  51 namespace caspar { namespace core {\r
  52 \r
  53 struct output::impl\r
  54 {               \r
  55         spl::shared_ptr<diagnostics::graph>     graph_;\r
  56         monitor::basic_subject                          event_subject_;\r
  57         const int                                                       channel_index_;\r
  58         video_format_desc                                       format_desc_;\r
  59         std::map<int, port>                                     ports_; \r
  60         prec_timer                                                      sync_timer_;\r
  61         boost::circular_buffer<const_frame>     frames_;\r
  62         executor                                                        executor_;              \r
  63 public:\r
  64         impl(spl::shared_ptr<diagnostics::graph> graph, const video_format_desc& format_desc, int channel_index) \r
  65                 : graph_(std::move(graph))\r
  66                 , event_subject_("output")\r
  67                 , channel_index_(channel_index)\r
  68                 , format_desc_(format_desc)\r
  69                 , executor_(L"output")\r
  70         {\r
  71                 graph_->set_color("consume-time", diagnostics::color(1.0f, 0.4f, 0.0f, 0.8));\r
  72         }       \r
  73         \r
  74         void add(int index, spl::shared_ptr<frame_consumer> consumer)\r
  75         {               \r
  76                 remove(index);\r
  77 \r
  78                 consumer->initialize(format_desc_, channel_index_);\r
  79                 \r
  80                 executor_.begin_invoke([this, index, consumer]\r
  81                 {                       \r
  82                         port p(index, channel_index_, std::move(consumer));\r
  83                         p.subscribe(event_subject_);\r
  84                         ports_.insert(std::make_pair(index, std::move(p)));\r
  85                 }, task_priority::high_priority);\r
  86         }\r
  87 \r
  88         void add(const spl::shared_ptr<frame_consumer>& consumer)\r
  89         {\r
  90                 add(consumer->index(), consumer);\r
  91         }\r
  92 \r
  93         void remove(int index)\r
  94         {               \r
  95                 executor_.begin_invoke([=]\r
  96                 {\r
  97                         auto it = ports_.find(index);\r
  98                         if(it != ports_.end())\r
  99                                 ports_.erase(it);                                       \r
 100                 }, task_priority::high_priority);\r
 101         }\r
 102 \r
 103         void remove(const spl::shared_ptr<frame_consumer>& consumer)\r
 104         {\r
 105                 remove(consumer->index());\r
 106         }\r
 107         \r
 108         void video_format_desc(const core::video_format_desc& format_desc)\r
 109         {\r
 110                 executor_.invoke([&]\r
 111                 {\r
 112                         if(format_desc_ == format_desc)\r
 113                                 return;\r
 114 \r
 115                         auto it = ports_.begin();\r
 116                         while(it != ports_.end())\r
 117                         {                                               \r
 118                                 try\r
 119                                 {\r
 120                                         it->second.video_format_desc(format_desc);\r
 121                                         ++it;\r
 122                                 }\r
 123                                 catch(...)\r
 124                                 {\r
 125                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 126                                         ports_.erase(it++);\r
 127                                 }\r
 128                         }\r
 129                         \r
 130                         format_desc_ = format_desc;\r
 131                         frames_.clear();\r
 132                 });\r
 133         }\r
 134 \r
 135         std::pair<int, int> minmax_buffer_depth() const\r
 136         {               \r
 137                 if(ports_.empty())\r
 138                         return std::make_pair(0, 0);\r
 139                 \r
 140                 auto buffer_depths = ports_ | \r
 141                                                          boost::adaptors::map_values | // std::function is MSVC workaround\r
 142                                                          boost::adaptors::transformed(std::function<int(const port&)>([](const port& p){return p.buffer_depth();})); \r
 143                 \r
 144 \r
 145                 return std::make_pair(*boost::range::min_element(buffer_depths), *boost::range::max_element(buffer_depths));\r
 146         }\r
 147 \r
 148         bool has_synchronization_clock() const\r
 149         {\r
 150                 return boost::range::count_if(ports_ | boost::adaptors::map_values,\r
 151                                                                           [](const port& p){return p.has_synchronization_clock();}) > 0;\r
 152         }\r
 153                 \r
 154         void operator()(const_frame input_frame, const core::video_format_desc& format_desc)\r
 155         {\r
 156                 video_format_desc(format_desc);\r
 157 \r
 158                 executor_.invoke([=]\r
 159                 {                       \r
 160                         boost::timer frame_timer;\r
 161 \r
 162                         if(!has_synchronization_clock())\r
 163                                 sync_timer_.tick(1.0/format_desc_.fps);\r
 164                                 \r
 165                         if(input_frame.size() != format_desc_.size)\r
 166                         {\r
 167                                 CASPAR_LOG(debug) << print() << L" Invalid input frame dimension.";\r
 168                                 return;\r
 169                         }\r
 170 \r
 171                         auto minmax = minmax_buffer_depth();\r
 172 \r
 173                         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
 174                         frames_.push_back(input_frame);\r
 175 \r
 176                         if(!frames_.full())\r
 177                                 return;\r
 178 \r
 179                         for(auto it = ports_.begin(); it != ports_.end();)\r
 180                         {\r
 181                                 auto& port      = it->second;\r
 182                                 auto& frame     = frames_.at(port.buffer_depth()-minmax.first);\r
 183                                         \r
 184                                 try\r
 185                                 {\r
 186                                         if(port.send(frame))\r
 187                                                 ++it;\r
 188                                         else\r
 189                                                 ports_.erase(it++);                                     \r
 190                                 }\r
 191                                 catch(...)\r
 192                                 {\r
 193                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 194                                         ports_.erase(it++);\r
 195                                 }\r
 196                         }\r
 197 \r
 198                         graph_->set_value("consume-time", frame_timer.elapsed()*format_desc.fps*0.5);\r
 199                 });\r
 200         }\r
 201 \r
 202         std::wstring print() const\r
 203         {\r
 204                 return L"output[" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";\r
 205         }\r
 206 \r
 207         boost::unique_future<boost::property_tree::wptree> info()\r
 208         {\r
 209                 return std::move(executor_.begin_invoke([&]() -> boost::property_tree::wptree\r
 210                 {                       \r
 211                         boost::property_tree::wptree info;\r
 212                         BOOST_FOREACH(auto& port, ports_)\r
 213                         {\r
 214                                 info.add_child(L"consumers.consumer", port.second.info())\r
 215                                         .add(L"index", port.first); \r
 216                         }\r
 217                         return info;\r
 218                 }, task_priority::high_priority));\r
 219         }\r
 220 };\r
 221 \r
 222 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
 223 void output::add(int index, const spl::shared_ptr<frame_consumer>& consumer){impl_->add(index, consumer);}\r
 224 void output::add(const spl::shared_ptr<frame_consumer>& consumer){impl_->add(consumer);}\r
 225 void output::remove(int index){impl_->remove(index);}\r
 226 void output::remove(const spl::shared_ptr<frame_consumer>& consumer){impl_->remove(consumer);}\r
 227 boost::unique_future<boost::property_tree::wptree> output::info() const{return impl_->info();}\r
 228 void output::operator()(const_frame frame, const video_format_desc& format_desc){(*impl_)(std::move(frame), format_desc);}\r
 229 void output::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}\r
 230 void output::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}\r
 231 }}