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 #include <common/future.h>
  42
  43 #include <core/mixer/image/image_mixer.h>
  44 #include <core/diagnostics/call_context.h>
  45
  46 #include <tbb/spin_mutex.h>
  47
  48 #include <boost/property_tree/ptree.hpp>
  49 #include <boost/lexical_cast.hpp>
  50
  51 #include <string>
  52
  53 namespace caspar { namespace core {
  54
  55 struct video_channel::impl final
  56 {
  57         spl::shared_ptr<monitor::subject>                                       monitor_subject_;
  58
  59         const int                                                                                       index_;
  60
  61         mutable tbb::spin_mutex                                                         format_desc_mutex_;
  62         core::video_format_desc                                                         format_desc_;
  63         mutable tbb::spin_mutex                                                         channel_layout_mutex_;
  64         core::audio_channel_layout                                                      channel_layout_;
  65
  66         const spl::shared_ptr<caspar::diagnostics::graph>       graph_                                  = [](int index)
  67                                                                                                                                                                   {
  68                                                                                                                                                                           core::diagnostics::scoped_call_context save;
  69                                                                                                                                                                           core::diagnostics::call_context::for_thread().video_channel = index;
  70                                                                                                                                                                           return spl::make_shared<caspar::diagnostics::graph>();
  71                                                                                                                                                                   }(index_);
  72
  73         caspar::core::output                                                            output_;
  74         std::future<void>                                                                       output_ready_for_frame_ = make_ready_future();
  75         spl::shared_ptr<image_mixer>                                            image_mixer_;
  76         caspar::core::mixer                                                                     mixer_;
  77         caspar::core::stage                                                                     stage_;
  78
  79         executor                                                                                        executor_                               { L"video_channel " + boost::lexical_cast<std::wstring>(index_) };
  80 public:
  81         impl(
  82                         int index,
  83                         const core::video_format_desc& format_desc,
  84                         const core::audio_channel_layout& channel_layout,
  85                         std::unique_ptr<image_mixer> image_mixer)
  86                 : monitor_subject_(spl::make_shared<monitor::subject>(
  87                                 "/channel/" + boost::lexical_cast<std::string>(index)))
  88                 , index_(index)
  89                 , format_desc_(format_desc)
  90                 , channel_layout_(channel_layout)
  91                 , output_(graph_, format_desc, channel_layout, index)
  92                 , image_mixer_(std::move(image_mixer))
  93                 , mixer_(index, graph_, image_mixer_)
  94                 , stage_(index, graph_)
  95         {
  96                 graph_->set_color("tick-time", caspar::diagnostics::color(0.0f, 0.6f, 0.9f));
  97                 graph_->set_text(print());
  98                 caspar::diagnostics::register_graph(graph_);
  99
 100                 output_.monitor_output().attach_parent(monitor_subject_);
 101                 mixer_.monitor_output().attach_parent(monitor_subject_);
 102                 stage_.monitor_output().attach_parent(monitor_subject_);
 103
 104                 executor_.begin_invoke([=]{tick();});
 105
 106                 CASPAR_LOG(info) << print() << " Successfully Initialized.";
 107         }
 108
 109         ~impl()
 110         {
 111                 CASPAR_LOG(info) << print() << " Uninitializing.";
 112         }
 113
 114         core::video_format_desc video_format_desc() const
 115         {
 116                 return lock(format_desc_mutex_, [&]
 117                 {
 118                         return format_desc_;
 119                 });
 120         }
 121
 122         void video_format_desc(const core::video_format_desc& format_desc)
 123         {
 124                 lock(format_desc_mutex_, [&]
 125                 {
 126                         format_desc_ = format_desc;
 127                         stage_.clear();
 128                 });
 129         }
 130
 131         core::audio_channel_layout audio_channel_layout() const
 132         {
 133                 return lock(channel_layout_mutex_, [&]
 134                 {
 135                         return channel_layout_;
 136                 });
 137         }
 138
 139         void audio_channel_layout(const core::audio_channel_layout& channel_layout)
 140         {
 141                 lock(channel_layout_mutex_, [&]
 142                 {
 143                         channel_layout_ = channel_layout;
 144                         stage_.clear();
 145                 });
 146         }
 147
 148         void tick()
 149         {
 150                 try
 151                 {
 152
 153                         auto format_desc        = video_format_desc();
 154                         auto channel_layout = audio_channel_layout();
 155
 156                         caspar::timer frame_timer;
 157
 158                         // Produce
 159
 160                         auto stage_frames = stage_(format_desc);
 161
 162                         // Mix
 163
 164                         auto mixed_frame  = mixer_(std::move(stage_frames), format_desc, channel_layout);
 165
 166                         // Consume
 167
 168                         output_ready_for_frame_.get();
 169                         output_ready_for_frame_ = output_(std::move(mixed_frame), format_desc, channel_layout);
 170
 171                         auto frame_time = frame_timer.elapsed()*format_desc.fps*0.5;
 172                         graph_->set_value("tick-time", frame_time);
 173
 174                         *monitor_subject_       << monitor::message("/profiler/time")   % frame_timer.elapsed() % (1.0/format_desc_.fps)
 175                                                                 << monitor::message("/format")                  % format_desc.name;
 176                 }
 177                 catch(...)
 178                 {
 179                         CASPAR_LOG_CURRENT_EXCEPTION();
 180                 }
 181
 182                 if (executor_.is_running())
 183                         executor_.begin_invoke([=]{tick();});
 184         }
 185
 186         std::wstring print() const
 187         {
 188                 return L"video_channel[" + boost::lexical_cast<std::wstring>(index_) + L"|" +  video_format_desc().name + L"]";
 189         }
 190
 191         int index() const
 192         {
 193                 return index_;
 194         }
 195
 196         boost::property_tree::wptree info() const
 197         {
 198                 boost::property_tree::wptree info;
 199
 200                 auto stage_info  = stage_.info();
 201                 auto mixer_info  = mixer_.info();
 202                 auto output_info = output_.info();
 203
 204                 info.add(L"video-mode", video_format_desc().name);
 205                 info.add(L"audio-channel-layout", audio_channel_layout().print());
 206                 info.add_child(L"stage", stage_info.get());
 207                 info.add_child(L"mixer", mixer_info.get());
 208                 info.add_child(L"output", output_info.get());
 209
 210                 return info;
 211         }
 212
 213         boost::property_tree::wptree delay_info() const
 214         {
 215                 boost::property_tree::wptree info;
 216
 217                 auto stage_info = stage_.delay_info();
 218                 auto mixer_info = mixer_.delay_info();
 219                 auto output_info = output_.delay_info();
 220
 221                 // TODO: because of std::async deferred timed waiting does not work so for now we have to block
 222                 info.add_child(L"layers", stage_info.get());
 223                 info.add_child(L"mix-time", mixer_info.get());
 224                 info.add_child(L"output", output_info.get());
 225
 226                 return info;
 227         }
 228 };
 229
 230 video_channel::video_channel(
 231                 int index,
 232                 const core::video_format_desc& format_desc,
 233                 const core::audio_channel_layout& channel_layout,
 234                 std::unique_ptr<image_mixer> image_mixer) : impl_(new impl(index, format_desc, channel_layout, std::move(image_mixer))){}
 235 video_channel::~video_channel(){}
 236 const stage& video_channel::stage() const { return impl_->stage_;}
 237 stage& video_channel::stage() { return impl_->stage_;}
 238 const mixer& video_channel::mixer() const{ return impl_->mixer_;}
 239 mixer& video_channel::mixer() { return impl_->mixer_;}
 240 const output& video_channel::output() const { return impl_->output_;}
 241 output& video_channel::output() { return impl_->output_;}
 242 spl::shared_ptr<frame_factory> video_channel::frame_factory() { return impl_->image_mixer_;}
 243 core::video_format_desc video_channel::video_format_desc() const{return impl_->video_format_desc();}
 244 void core::video_channel::video_format_desc(const core::video_format_desc& format_desc){impl_->video_format_desc(format_desc);}
 245 core::audio_channel_layout video_channel::audio_channel_layout() const { return impl_->audio_channel_layout(); }
 246 void core::video_channel::audio_channel_layout(const core::audio_channel_layout& channel_layout) { impl_->audio_channel_layout(channel_layout); }
 247 boost::property_tree::wptree video_channel::info() const{return impl_->info();}
 248 boost::property_tree::wptree video_channel::delay_info() const { return impl_->delay_info(); }
 249 int video_channel::index() const { return impl_->index(); }
 250 monitor::subject& video_channel::monitor_output(){ return *impl_->monitor_subject_; }
 251
 252 }}