git.sesse.net Git - casparcg/blob - core/video_channel.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 #include "video_channel.h"\r
  25 \r
  26 #include "video_format.h"\r
  27 \r
  28 #include "producer/stage.h"\r
  29 #include "mixer/mixer.h"\r
  30 #include "consumer/output.h"\r
  31 #include "frame/data_frame.h"\r
  32 #include "frame/frame_factory.h"\r
  33 \r
  34 #include <common/diagnostics/graph.h>\r
  35 #include <common/env.h>\r
  36 #include <common/concurrency/lock.h>\r
  37 #include <common/concurrency/executor.h>\r
  38 \r
  39 #include <tbb/spin_mutex.h>\r
  40 \r
  41 #include <boost/property_tree/ptree.hpp>\r
  42 \r
  43 #include <string>\r
  44 \r
  45 namespace caspar { namespace core {\r
  46 \r
  47 struct video_channel::impl sealed : public frame_factory\r
  48 {\r
  49         reactive::basic_subject<spl::shared_ptr<const data_frame>> frame_subject_;\r
  50         monitor::subject                                                                                   event_subject_;\r
  51 \r
  52         const int                                                                               index_;\r
  53 \r
  54         mutable tbb::spin_mutex                                                 format_desc_mutex_;\r
  55         video_format_desc                                                               format_desc_;\r
  56         \r
  57         const spl::shared_ptr<diagnostics::graph>               graph_;\r
  58 \r
  59         const spl::shared_ptr<caspar::core::output>             output_;\r
  60         const spl::shared_ptr<caspar::core::mixer>              mixer_;\r
  61         const spl::shared_ptr<caspar::core::stage>              stage_; \r
  62 \r
  63         executor                                                                                executor_;\r
  64 public:\r
  65         impl(int index, const video_format_desc& format_desc, spl::shared_ptr<image_mixer> image_mixer)  \r
  66                 : event_subject_(monitor::path() % "channel" % index)\r
  67                 , index_(index)\r
  68                 , format_desc_(format_desc)\r
  69                 , output_(new caspar::core::output(graph_, format_desc, index))\r
  70                 , mixer_(new caspar::core::mixer(graph_, std::move(image_mixer)))\r
  71                 , stage_(new caspar::core::stage(graph_))       \r
  72                 , executor_(L"video_channel")\r
  73         {\r
  74                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
  75                 graph_->set_text(print());\r
  76                 diagnostics::register_graph(graph_);\r
  77 \r
  78                 executor_.begin_invoke([=]{tick();});\r
  79 \r
  80                 CASPAR_LOG(info) << print() << " Successfully Initialized.";\r
  81         }\r
  82         \r
  83         // frame_factory\r
  84                                                 \r
  85         virtual spl::shared_ptr<write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc) override\r
  86         {               \r
  87                 return mixer_->create_frame(tag, desc);\r
  88         }\r
  89         \r
  90         virtual core::video_format_desc get_video_format_desc() const override\r
  91         {\r
  92                 return lock(format_desc_mutex_, [&]\r
  93                 {\r
  94                         return format_desc_;\r
  95                 });\r
  96         }\r
  97         \r
  98         // video_channel\r
  99 \r
 100         void tick()\r
 101         {\r
 102                 try\r
 103                 {\r
 104                         auto format_desc = get_video_format_desc();\r
 105 \r
 106                         boost::timer frame_timer;\r
 107 \r
 108                         // Produce\r
 109                         \r
 110                         auto stage_frames = (*stage_)(format_desc);\r
 111 \r
 112                         // Mix\r
 113                         \r
 114                         auto mixed_frame  = (*mixer_)(std::move(stage_frames), format_desc);\r
 115 \r
 116                         // Consume\r
 117                         \r
 118                         frame_subject_ << mixed_frame;\r
 119                         \r
 120                         (*output_)(std::move(mixed_frame), format_desc);\r
 121                 \r
 122                         graph_->set_value("tick-time", frame_timer.elapsed()*format_desc.fps*0.5);\r
 123 \r
 124                         event_subject_ << monitor::event("debug/time") % frame_timer.elapsed();\r
 125                         event_subject_ << monitor::event("format")              % u8(format_desc.name);\r
 126                 }\r
 127                 catch(...)\r
 128                 {\r
 129                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 130                 }\r
 131 \r
 132                 executor_.begin_invoke([=]{tick();});\r
 133         }\r
 134 \r
 135         void set_video_format_desc(const video_format_desc& format_desc)\r
 136         {\r
 137                 lock(format_desc_mutex_, [&]\r
 138                 {\r
 139                         format_desc_ = format_desc;\r
 140                 });\r
 141         }\r
 142                 \r
 143         std::wstring print() const\r
 144         {\r
 145                 return L"video_channel[" + boost::lexical_cast<std::wstring>(index_) + L"|" +  get_video_format_desc().name + L"]";\r
 146         }\r
 147 \r
 148         boost::property_tree::wptree info() const\r
 149         {\r
 150                 boost::property_tree::wptree info;\r
 151 \r
 152                 auto stage_info  = stage_->info();\r
 153                 auto mixer_info  = mixer_->info();\r
 154                 auto output_info = output_->info();\r
 155 \r
 156                 info.add(L"video-mode", format_desc_.name);\r
 157                 info.add_child(L"stage", stage_info.get());\r
 158                 info.add_child(L"mixer", mixer_info.get());\r
 159                 info.add_child(L"output", output_info.get());\r
 160    \r
 161                 return info;                       \r
 162         }\r
 163 };\r
 164 \r
 165 video_channel::video_channel(int index, const video_format_desc& format_desc, spl::shared_ptr<image_mixer> image_mixer) : impl_(new impl(index, format_desc, image_mixer)){}\r
 166 spl::shared_ptr<stage> video_channel::stage() { return impl_->stage_;} \r
 167 spl::shared_ptr<mixer> video_channel::mixer() { return impl_->mixer_;} \r
 168 spl::shared_ptr<frame_factory> video_channel::frame_factory() { return impl_;} \r
 169 spl::shared_ptr<output> video_channel::output() { return impl_->output_;} \r
 170 video_format_desc video_channel::get_video_format_desc() const{return impl_->format_desc_;}\r
 171 void video_channel::set_video_format_desc(const video_format_desc& format_desc){impl_->set_video_format_desc(format_desc);}\r
 172 boost::property_tree::wptree video_channel::info() const{return impl_->info();}\r
 173 void video_channel::subscribe(const frame_observer::observer_ptr& o) {impl_->frame_subject_.subscribe(o);}\r
 174 void video_channel::unsubscribe(const frame_observer::observer_ptr& o) {impl_->frame_subject_.unsubscribe(o);}          \r
 175 void video_channel::subscribe(const event_observer::observer_ptr& o) {impl_->event_subject_.subscribe(o);}\r
 176 void video_channel::unsubscribe(const event_observer::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}\r
 177 \r
 178 }}