git.sesse.net Git - casparcg/blob - core/consumer/output.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 #ifdef _MSC_VER
  25 #pragma warning (disable : 4244)
  26 #endif
  27
  28 #include "output.h"
  29
  30 #include "frame_consumer.h"
  31 #include "port.h"
  32
  33 #include "../video_format.h"
  34 #include "../frame/frame.h"
  35
  36 #include <common/assert.h>
  37 #include <common/future.h>
  38 #include <common/executor.h>
  39 #include <common/diagnostics/graph.h>
  40 #include <common/prec_timer.h>
  41 #include <common/memshfl.h>
  42 #include <common/env.h>
  43
  44 #include <boost/circular_buffer.hpp>
  45 #include <boost/lexical_cast.hpp>
  46 #include <boost/property_tree/ptree.hpp>
  47 #include <boost/range/algorithm.hpp>
  48 #include <boost/range/adaptors.hpp>
  49 #include <boost/timer.hpp>
  50
  51 namespace caspar { namespace core {
  52
  53 struct output::impl
  54 {
  55         spl::shared_ptr<diagnostics::graph>     graph_;
  56         monitor::basic_subject                          event_subject_;
  57         const int                                                       channel_index_;
  58         video_format_desc                                       format_desc_;
  59         std::map<int, port>                                     ports_;
  60         prec_timer                                                      sync_timer_;
  61         boost::circular_buffer<const_frame>     frames_;
  62         executor                                                        executor_;
  63 public:
  64         impl(spl::shared_ptr<diagnostics::graph> graph, const video_format_desc& format_desc, int channel_index)
  65                 : graph_(std::move(graph))
  66                 , event_subject_("output")
  67                 , channel_index_(channel_index)
  68                 , format_desc_(format_desc)
  69                 , executor_(L"output")
  70         {
  71                 graph_->set_color("consume-time", diagnostics::color(1.0f, 0.4f, 0.0f, 0.8));
  72         }
  73
  74         void add(int index, spl::shared_ptr<frame_consumer> consumer)
  75         {
  76                 remove(index);
  77
  78                 consumer->initialize(format_desc_, channel_index_);
  79
  80                 executor_.begin_invoke([this, index, consumer]
  81                 {
  82                         port p(index, channel_index_, std::move(consumer));
  83                         p.subscribe(event_subject_);
  84                         ports_.insert(std::make_pair(index, std::move(p)));
  85                 }, task_priority::high_priority);
  86         }
  87
  88         void add(const spl::shared_ptr<frame_consumer>& consumer)
  89         {
  90                 add(consumer->index(), consumer);
  91         }
  92
  93         void remove(int index)
  94         {
  95                 executor_.begin_invoke([=]
  96                 {
  97                         auto it = ports_.find(index);
  98                         if(it != ports_.end())
  99                                 ports_.erase(it);
 100                 }, task_priority::high_priority);
 101         }
 102
 103         void remove(const spl::shared_ptr<frame_consumer>& consumer)
 104         {
 105                 remove(consumer->index());
 106         }
 107
 108         void video_format_desc(const core::video_format_desc& format_desc)
 109         {
 110                 executor_.invoke([&]
 111                 {
 112                         if(format_desc_ == format_desc)
 113                                 return;
 114
 115                         auto it = ports_.begin();
 116                         while(it != ports_.end())
 117                         {
 118                                 try
 119                                 {
 120                                         it->second.video_format_desc(format_desc);
 121                                         ++it;
 122                                 }
 123                                 catch(...)
 124                                 {
 125                                         CASPAR_LOG_CURRENT_EXCEPTION();
 126                                         ports_.erase(it++);
 127                                 }
 128                         }
 129
 130                         format_desc_ = format_desc;
 131                         frames_.clear();
 132                 });
 133         }
 134
 135         std::pair<int, int> minmax_buffer_depth() const
 136         {
 137                 if(ports_.empty())
 138                         return std::make_pair(0, 0);
 139
 140                 auto buffer_depths = ports_ |
 141                                                          boost::adaptors::map_values | // std::function is MSVC workaround
 142                                                          boost::adaptors::transformed(std::function<int(const port&)>([](const port& p){return p.buffer_depth();}));
 143
 144
 145                 return std::make_pair(*boost::range::min_element(buffer_depths), *boost::range::max_element(buffer_depths));
 146         }
 147
 148         bool has_synchronization_clock() const
 149         {
 150                 return boost::range::count_if(ports_ | boost::adaptors::map_values,
 151                                                                           [](const port& p){return p.has_synchronization_clock();}) > 0;
 152         }
 153
 154         void operator()(const_frame input_frame, const core::video_format_desc& format_desc)
 155         {
 156                 boost::timer frame_timer;
 157
 158                 video_format_desc(format_desc);
 159
 160                 executor_.invoke([=]
 161                 {
 162
 163                         if(!has_synchronization_clock())
 164                                 sync_timer_.tick(1.0/format_desc_.fps);
 165
 166                         if(input_frame.size() != format_desc_.size)
 167                         {
 168                                 CASPAR_LOG(debug) << print() << L" Invalid input frame dimension.";
 169                                 return;
 170                         }
 171
 172                         auto minmax = minmax_buffer_depth();
 173
 174                         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.
 175                         frames_.push_back(input_frame);
 176
 177                         if(!frames_.full())
 178                                 return;
 179
 180                         std::map<int, boost::unique_future<bool>> send_results;
 181
 182                         // Start invocations
 183                         for (auto it = ports_.begin(); it != ports_.end(); ++it)
 184                         {
 185                                 auto& port      = it->second;
 186                                 auto& frame     = frames_.at(port.buffer_depth()-minmax.first);
 187
 188                                 try
 189                                 {
 190                                         send_results.insert(std::make_pair(it->first, port.send(frame)));
 191                                 }
 192                                 catch (...)
 193                                 {
 194                                         CASPAR_LOG_CURRENT_EXCEPTION();
 195                                         ports_.erase(it);
 196                                 }
 197                         }
 198
 199                         // Retrieve results
 200                         for (auto it = send_results.begin(); it != send_results.end(); ++it)
 201                         {
 202                                 try
 203                                 {
 204                                         if (!it->second.get())
 205                                                 ports_.erase(it->first);
 206                                 }
 207                                 catch (...)
 208                                 {
 209                                         CASPAR_LOG_CURRENT_EXCEPTION();
 210                                         ports_.erase(it->first);
 211                                 }
 212                         }
 213                 });
 214
 215                 graph_->set_value("consume-time", frame_timer.elapsed()*format_desc.fps*0.5);
 216         }
 217
 218         std::wstring print() const
 219         {
 220                 return L"output[" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";
 221         }
 222
 223         boost::unique_future<boost::property_tree::wptree> info()
 224         {
 225                 return std::move(executor_.begin_invoke([&]() -> boost::property_tree::wptree
 226                 {
 227                         boost::property_tree::wptree info;
 228                         BOOST_FOREACH(auto& port, ports_)
 229                         {
 230                                 info.add_child(L"consumers.consumer", port.second.info())
 231                                         .add(L"index", port.first);
 232                         }
 233                         return info;
 234                 }, task_priority::high_priority));
 235         }
 236 };
 237
 238 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)){}
 239 void output::add(int index, const spl::shared_ptr<frame_consumer>& consumer){impl_->add(index, consumer);}
 240 void output::add(const spl::shared_ptr<frame_consumer>& consumer){impl_->add(consumer);}
 241 void output::remove(int index){impl_->remove(index);}
 242 void output::remove(const spl::shared_ptr<frame_consumer>& consumer){impl_->remove(consumer);}
 243 boost::unique_future<boost::property_tree::wptree> output::info() const{return impl_->info();}
 244 void output::operator()(const_frame frame, const video_format_desc& format_desc){(*impl_)(std::move(frame), format_desc);}
 245 void output::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}
 246 void output::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}
 247 }}