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/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         const int                                                                                                       channel_index_;\r
  54         video_format_desc                                                                                       format_desc_;\r
  55         std::map<int, spl::shared_ptr<frame_consumer>>                          consumers_;     \r
  56         prec_timer                                                                                                      sync_timer_;\r
  57         boost::circular_buffer<spl::shared_ptr<const data_frame>>       frames_;\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, spl::shared_ptr<frame_consumer> consumer)\r
  68         {               \r
  69                 remove(index);\r
  70 \r
  71                 consumer->initialize(format_desc_, channel_index_);\r
  72 \r
  73                 executor_.begin_invoke([=]\r
  74                 {\r
  75                         consumers_.insert(std::make_pair(index, consumer));\r
  76                         CASPAR_LOG(info) << print() << L" " << consumer->print() << L" Added.";\r
  77                 }, task_priority::high_priority);\r
  78         }\r
  79 \r
  80         void add(const spl::shared_ptr<frame_consumer>& consumer)\r
  81         {\r
  82                 add(consumer->index(), consumer);\r
  83         }\r
  84 \r
  85         void remove(int index)\r
  86         {               \r
  87                 executor_.begin_invoke([=]\r
  88                 {\r
  89                         auto it = consumers_.find(index);\r
  90                         if(it != consumers_.end())\r
  91                                 consumers_.erase(it);                                   \r
  92                 }, task_priority::high_priority);\r
  93         }\r
  94 \r
  95         void remove(const spl::shared_ptr<frame_consumer>& consumer)\r
  96         {\r
  97                 remove(consumer->index());\r
  98         }\r
  99         \r
 100         void set_video_format_desc(const video_format_desc& format_desc)\r
 101         {\r
 102                 executor_.invoke([&]\r
 103                 {\r
 104                         auto it = consumers_.begin();\r
 105                         while(it != consumers_.end())\r
 106                         {                                               \r
 107                                 try\r
 108                                 {\r
 109                                         it->second->initialize(format_desc, channel_index_);\r
 110                                         ++it;\r
 111                                 }\r
 112                                 catch(...)\r
 113                                 {\r
 114                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 115                                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 116                                         consumers_.erase(it++);\r
 117                                 }\r
 118                         }\r
 119                         \r
 120                         format_desc_ = format_desc;\r
 121                         frames_.clear();\r
 122                 });\r
 123         }\r
 124 \r
 125         std::pair<int, int> minmax_buffer_depth() const\r
 126         {               \r
 127                 if(consumers_.empty())\r
 128                         return std::make_pair(0, 0);\r
 129                 \r
 130                 auto buffer_depths = consumers_ | \r
 131                                                          boost::adaptors::map_values | // std::function is MSVC workaround\r
 132                                                          boost::adaptors::transformed(std::function<int(const spl::shared_ptr<frame_consumer>&)>([](const spl::shared_ptr<frame_consumer>& x){return x->buffer_depth();})); \r
 133                 \r
 134 \r
 135                 return std::make_pair(*boost::range::min_element(buffer_depths), *boost::range::max_element(buffer_depths));\r
 136         }\r
 137 \r
 138         bool has_synchronization_clock() const\r
 139         {\r
 140                 return boost::range::count_if(consumers_ | boost::adaptors::map_values, [](const spl::shared_ptr<frame_consumer>& x){return x->has_synchronization_clock();}) > 0;\r
 141         }\r
 142                 \r
 143         void operator()(spl::shared_ptr<const data_frame> input_frame, const video_format_desc& format_desc)\r
 144         {\r
 145                 executor_.invoke([=]\r
 146                 {                       \r
 147                         if(!has_synchronization_clock())\r
 148                                 sync_timer_.tick(1.0/format_desc_.fps);\r
 149                                 \r
 150                         if(format_desc_ != format_desc)\r
 151                                 set_video_format_desc(format_desc);\r
 152 \r
 153                         if(input_frame->image_data().size() != format_desc_.size)\r
 154                         {\r
 155                                 sync_timer_.tick(1.0/format_desc_.fps);\r
 156                                 return;\r
 157                         }\r
 158                                         \r
 159                         auto minmax = minmax_buffer_depth();\r
 160 \r
 161                         frames_.set_capacity(std::max(1, minmax.second - minmax.first) + 1); // std::max(1, x) since we want to guarantee some pipeline depth for asycnhronous mixer read-back.\r
 162                         frames_.push_back(input_frame);\r
 163 \r
 164                         if(!frames_.full())\r
 165                                 return;\r
 166 \r
 167                         for(auto it = consumers_.begin(); it != consumers_.end();)\r
 168                         {\r
 169                                 auto consumer   = it->second;\r
 170                                 auto frame              = frames_.at(consumer->buffer_depth()-minmax.first);\r
 171                                                 \r
 172                                 if(consumer->send(frame))\r
 173                                         ++it;\r
 174                                 else\r
 175                                 {\r
 176                                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 177                                         consumers_.erase(it++);\r
 178                                 }\r
 179                         }\r
 180                 });\r
 181         }\r
 182 \r
 183         std::wstring print() const\r
 184         {\r
 185                 return L"output[" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";\r
 186         }\r
 187 \r
 188         boost::unique_future<boost::property_tree::wptree> info()\r
 189         {\r
 190                 return std::move(executor_.begin_invoke([&]() -> boost::property_tree::wptree\r
 191                 {                       \r
 192                         boost::property_tree::wptree info;\r
 193                         BOOST_FOREACH(auto& consumer, consumers_)\r
 194                         {\r
 195                                 info.add_child(L"consumers.consumer", consumer.second->info())\r
 196                                         .add(L"index", consumer.first); \r
 197                         }\r
 198                         return info;\r
 199                 }, task_priority::high_priority));\r
 200         }\r
 201 };\r
 202 \r
 203 output::output(const video_format_desc& format_desc, int channel_index) : impl_(new impl(format_desc, channel_index)){}\r
 204 void output::add(int index, const spl::shared_ptr<frame_consumer>& consumer){impl_->add(index, consumer);}\r
 205 void output::add(const spl::shared_ptr<frame_consumer>& consumer){impl_->add(consumer);}\r
 206 void output::remove(int index){impl_->remove(index);}\r
 207 void output::remove(const spl::shared_ptr<frame_consumer>& consumer){impl_->remove(consumer);}\r
 208 boost::unique_future<boost::property_tree::wptree> output::info() const{return impl_->info();}\r
 209 void output::operator()(spl::shared_ptr<const data_frame> frame, const video_format_desc& format_desc){(*impl_)(std::move(frame), format_desc);}\r
 210 }}