git.sesse.net Git - casparcg/blob - core/video_channel.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "StdAfx.h"
  23
  24 #include "video_channel.h"
  25
  26 #include "video_format.h"
  27
  28 #include "producer/stage.h"
  29 #include "mixer/mixer.h"
  30 #include "consumer/output.h"
  31 #include "frame/frame.h"
  32 #include "frame/draw_frame.h"
  33 #include "frame/frame_factory.h"
  34 #include "frame/audio_channel_layout.h"
  35
  36 #include <common/diagnostics/graph.h>
  37 #include <common/env.h>
  38 #include <common/lock.h>
  39 #include <common/executor.h>
  40 #include <common/timer.h>
  41
  42 #include <core/mixer/image/image_mixer.h>
  43 #include <core/diagnostics/call_context.h>
  44
  45 #include <tbb/spin_mutex.h>
  46
  47 #include <boost/property_tree/ptree.hpp>
  48 #include <boost/lexical_cast.hpp>
  49
  50 #include <string>
  51
  52 namespace caspar { namespace core {
  53
  54 struct video_channel::impl final
  55 {
  56         spl::shared_ptr<monitor::subject>                                       monitor_subject_;
  57
  58         const int                                                                                       index_;
  59
  60         mutable tbb::spin_mutex                                                         format_desc_mutex_;
  61         core::video_format_desc                                                         format_desc_;
  62         mutable tbb::spin_mutex                                                         channel_layout_mutex_;
  63         core::audio_channel_layout                                                      channel_layout_;
  64
  65         const spl::shared_ptr<caspar::diagnostics::graph>       graph_                          = [](int index)
  66                                                                                                                                                           {
  67                                                                                                                                                                   core::diagnostics::scoped_call_context save;
  68                                                                                                                                                                   core::diagnostics::call_context::for_thread().video_channel = index;
  69                                                                                                                                                                   return spl::make_shared<caspar::diagnostics::graph>();
  70                                                                                                                                                           }(index_);
  71
  72         caspar::core::output                                                            output_;
  73         spl::shared_ptr<image_mixer>                                            image_mixer_;
  74         caspar::core::mixer                                                                     mixer_;
  75         caspar::core::stage                                                                     stage_;
  76
  77         executor                                                                                        executor_                       { L"video_channel " + boost::lexical_cast<std::wstring>(index_) };
  78 public:
  79         impl(
  80                         int index,
  81                         const core::video_format_desc& format_desc,
  82                         const core::audio_channel_layout& channel_layout,
  83                         std::unique_ptr<image_mixer> image_mixer)
  84                 : monitor_subject_(spl::make_shared<monitor::subject>(
  85                                 "/channel/" + boost::lexical_cast<std::string>(index)))
  86                 , index_(index)
  87                 , format_desc_(format_desc)
  88                 , channel_layout_(channel_layout)
  89                 , output_(graph_, format_desc, channel_layout, index)
  90                 , image_mixer_(std::move(image_mixer))
  91                 , mixer_(index, graph_, image_mixer_)
  92                 , stage_(index, graph_)
  93         {
  94                 graph_->set_color("tick-time", caspar::diagnostics::color(0.0f, 0.6f, 0.9f));
  95                 graph_->set_text(print());
  96                 caspar::diagnostics::register_graph(graph_);
  97
  98                 output_.monitor_output().attach_parent(monitor_subject_);
  99                 mixer_.monitor_output().attach_parent(monitor_subject_);
 100                 stage_.monitor_output().attach_parent(monitor_subject_);
 101
 102                 executor_.begin_invoke([=]{tick();});
 103
 104                 CASPAR_LOG(info) << print() << " Successfully Initialized.";
 105         }
 106
 107         ~impl()
 108         {
 109                 CASPAR_LOG(info) << print() << " Uninitializing.";
 110         }
 111
 112         core::video_format_desc video_format_desc() const
 113         {
 114                 return lock(format_desc_mutex_, [&]
 115                 {
 116                         return format_desc_;
 117                 });
 118         }
 119
 120         void video_format_desc(const core::video_format_desc& format_desc)
 121         {
 122                 lock(format_desc_mutex_, [&]
 123                 {
 124                         format_desc_ = format_desc;
 125                         stage_.clear();
 126                 });
 127         }
 128
 129         core::audio_channel_layout audio_channel_layout() const
 130         {
 131                 return lock(channel_layout_mutex_, [&]
 132                 {
 133                         return channel_layout_;
 134                 });
 135         }
 136
 137         void audio_channel_layout(const core::audio_channel_layout& channel_layout)
 138         {
 139                 lock(channel_layout_mutex_, [&]
 140                 {
 141                         channel_layout_ = channel_layout;
 142                         stage_.clear();
 143                 });
 144         }
 145
 146         void tick()
 147         {
 148                 try
 149                 {
 150
 151                         auto format_desc        = video_format_desc();
 152                         auto channel_layout = audio_channel_layout();
 153
 154                         caspar::timer frame_timer;
 155
 156                         // Produce
 157
 158                         auto stage_frames = stage_(format_desc);
 159
 160                         // Mix
 161
 162                         auto mixed_frame  = mixer_(std::move(stage_frames), format_desc, channel_layout);
 163
 164                         // Consume
 165
 166                         output_(std::move(mixed_frame), format_desc, channel_layout);
 167
 168                         auto frame_time = frame_timer.elapsed()*format_desc.fps*0.5;
 169                         graph_->set_value("tick-time", frame_time);
 170
 171                         *monitor_subject_       << monitor::message("/profiler/time")   % frame_timer.elapsed() % (1.0/format_desc_.fps)
 172                                                                 << monitor::message("/format")                  % format_desc.name;
 173                 }
 174                 catch(...)
 175                 {
 176                         CASPAR_LOG_CURRENT_EXCEPTION();
 177                 }
 178
 179                 if (executor_.is_running())
 180                         executor_.begin_invoke([=]{tick();});
 181         }
 182
 183         std::wstring print() const
 184         {
 185                 return L"video_channel[" + boost::lexical_cast<std::wstring>(index_) + L"|" +  video_format_desc().name + L"]";
 186         }
 187
 188         int index() const
 189         {
 190                 return index_;
 191         }
 192
 193         boost::property_tree::wptree info() const
 194         {
 195                 boost::property_tree::wptree info;
 196
 197                 auto stage_info  = stage_.info();
 198                 auto mixer_info  = mixer_.info();
 199                 auto output_info = output_.info();
 200
 201                 info.add(L"video-mode", video_format_desc().name);
 202                 info.add(L"audio-channel-layout", audio_channel_layout().print());
 203                 info.add_child(L"stage", stage_info.get());
 204                 info.add_child(L"mixer", mixer_info.get());
 205                 info.add_child(L"output", output_info.get());
 206
 207                 return info;
 208         }
 209
 210         boost::property_tree::wptree delay_info() const
 211         {
 212                 boost::property_tree::wptree info;
 213
 214                 auto stage_info = stage_.delay_info();
 215                 auto mixer_info = mixer_.delay_info();
 216                 auto output_info = output_.delay_info();
 217
 218                 // TODO: because of std::async deferred timed waiting does not work so for now we have to block
 219                 info.add_child(L"layers", stage_info.get());
 220                 info.add_child(L"mix-time", mixer_info.get());
 221                 info.add_child(L"output", output_info.get());
 222
 223                 return info;
 224         }
 225 };
 226
 227 video_channel::video_channel(
 228                 int index,
 229                 const core::video_format_desc& format_desc,
 230                 const core::audio_channel_layout& channel_layout,
 231                 std::unique_ptr<image_mixer> image_mixer) : impl_(new impl(index, format_desc, channel_layout, std::move(image_mixer))){}
 232 video_channel::~video_channel(){}
 233 const stage& video_channel::stage() const { return impl_->stage_;}
 234 stage& video_channel::stage() { return impl_->stage_;}
 235 const mixer& video_channel::mixer() const{ return impl_->mixer_;}
 236 mixer& video_channel::mixer() { return impl_->mixer_;}
 237 const output& video_channel::output() const { return impl_->output_;}
 238 output& video_channel::output() { return impl_->output_;}
 239 spl::shared_ptr<frame_factory> video_channel::frame_factory() { return impl_->image_mixer_;}
 240 core::video_format_desc video_channel::video_format_desc() const{return impl_->video_format_desc();}
 241 void core::video_channel::video_format_desc(const core::video_format_desc& format_desc){impl_->video_format_desc(format_desc);}
 242 core::audio_channel_layout video_channel::audio_channel_layout() const { return impl_->audio_channel_layout(); }
 243 void core::video_channel::audio_channel_layout(const core::audio_channel_layout& channel_layout) { impl_->audio_channel_layout(channel_layout); }
 244 boost::property_tree::wptree video_channel::info() const{return impl_->info();}
 245 boost::property_tree::wptree video_channel::delay_info() const { return impl_->delay_info(); }
 246 int video_channel::index() const { return impl_->index(); }
 247 monitor::subject& video_channel::monitor_output(){ return *impl_->monitor_subject_; }
 248
 249 }}