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 #include <common/linq.h>
  44
  45 #include <boost/circular_buffer.hpp>
  46 #include <boost/lexical_cast.hpp>
  47 #include <boost/property_tree/ptree.hpp>
  48 #include <boost/timer.hpp>
  49
  50 #include <functional>
  51
  52 namespace caspar { namespace core {
  53
  54 struct output::impl
  55 {
  56         spl::shared_ptr<diagnostics::graph>     graph_;
  57         spl::shared_ptr<monitor::subject>       monitor_subject_        = spl::make_shared<monitor::subject>("/output");
  58         const int                                                       channel_index_;
  59         video_format_desc                                       format_desc_;
  60         std::map<int, port>                                     ports_;
  61         prec_timer                                                      sync_timer_;
  62         boost::circular_buffer<const_frame>     frames_;
  63         executor                                                        executor_                       = { L"output" };
  64 public:
  65         impl(spl::shared_ptr<diagnostics::graph> graph, const video_format_desc& format_desc, int channel_index)
  66                 : graph_(std::move(graph))
  67                 , channel_index_(channel_index)
  68                 , format_desc_(format_desc)
  69         {
  70                 graph_->set_color("consume-time", diagnostics::color(1.0f, 0.4f, 0.0f, 0.8));
  71         }
  72
  73         void add(int index, spl::shared_ptr<frame_consumer> consumer)
  74         {
  75                 remove(index);
  76
  77                 consumer->initialize(format_desc_, channel_index_);
  78
  79                 executor_.begin_invoke([this, index, consumer]
  80                 {
  81                         port p(index, channel_index_, std::move(consumer));
  82                         p.monitor_output().attach_parent(monitor_subject_);
  83                         ports_.insert(std::make_pair(index, std::move(p)));
  84                 }, task_priority::high_priority);
  85         }
  86
  87         void add(const spl::shared_ptr<frame_consumer>& consumer)
  88         {
  89                 add(consumer->index(), consumer);
  90         }
  91
  92         void remove(int index)
  93         {
  94                 executor_.begin_invoke([=]
  95                 {
  96                         auto it = ports_.find(index);
  97                         if(it != ports_.end())
  98                                 ports_.erase(it);
  99                 }, task_priority::high_priority);
 100         }
 101
 102         void remove(const spl::shared_ptr<frame_consumer>& consumer)
 103         {
 104                 remove(consumer->index());
 105         }
 106
 107         void video_format_desc(const core::video_format_desc& format_desc)
 108         {
 109                 executor_.invoke([&]
 110                 {
 111                         if(format_desc_ == format_desc)
 112                                 return;
 113
 114                         auto it = ports_.begin();
 115                         while(it != ports_.end())
 116                         {
 117                                 try
 118                                 {
 119                                         it->second.video_format_desc(format_desc);
 120                                         ++it;
 121                                 }
 122                                 catch(...)
 123                                 {
 124                                         CASPAR_LOG_CURRENT_EXCEPTION();
 125                                         ports_.erase(it++);
 126                                 }
 127                         }
 128
 129                         format_desc_ = format_desc;
 130                         frames_.clear();
 131                 });
 132         }
 133
 134         std::pair<int, int> minmax_buffer_depth() const
 135         {
 136                 if(ports_.empty())
 137                         return std::make_pair(0, 0);
 138
 139                 return cpplinq::from(ports_)
 140                         .select(values())
 141                         .select(std::mem_fn(&port::buffer_depth))
 142                         .aggregate(minmax::initial_value<int>(), minmax());
 143         }
 144
 145         bool has_synchronization_clock() const
 146         {
 147                 return cpplinq::from(ports_)
 148                         .select(values())
 149                         .where(std::mem_fn(&port::has_synchronization_clock))
 150                         .any();
 151         }
 152
 153         void operator()(const_frame input_frame, const core::video_format_desc& format_desc)
 154         {
 155                 boost::timer frame_timer;
 156
 157                 video_format_desc(format_desc);
 158
 159                 executor_.invoke([=]
 160                 {
 161
 162                         if(!has_synchronization_clock())
 163                                 sync_timer_.tick(1.0/format_desc_.fps);
 164
 165                         if(input_frame.size() != format_desc_.size)
 166                         {
 167                                 CASPAR_LOG(debug) << print() << L" Invalid input frame dimension.";
 168                                 return;
 169                         }
 170
 171                         auto minmax = minmax_buffer_depth();
 172
 173                         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.
 174                         frames_.push_back(input_frame);
 175
 176                         if(!frames_.full())
 177                                 return;
 178
 179                         std::map<int, std::future<bool>> send_results;
 180
 181                         // Start invocations
 182                         for (auto it = ports_.begin(); it != ports_.end();)
 183                         {
 184                                 auto& port      = it->second;
 185                                 auto& frame     = frames_.at(port.buffer_depth()-minmax.first);
 186
 187                                 try
 188                                 {
 189                                         send_results.insert(std::make_pair(it->first, port.send(frame)));
 190                                         ++it;
 191                                 }
 192                                 catch (...)
 193                                 {
 194                                         CASPAR_LOG_CURRENT_EXCEPTION();
 195                                         try
 196                                         {
 197                                                 send_results.insert(std::make_pair(it->first, port.send(frame)));
 198                                                 ++it;
 199                                         }
 200                                         catch(...)
 201                                         {
 202                                                 CASPAR_LOG_CURRENT_EXCEPTION();
 203                                                 CASPAR_LOG(error) << "Failed to recover consumer: " << port.print() << L". Removing it.";
 204                                                 it = ports_.erase(it);
 205                                         }
 206                                 }
 207                         }
 208
 209                         // Retrieve results
 210                         for (auto it = send_results.begin(); it != send_results.end(); ++it)
 211                         {
 212                                 try
 213                                 {
 214                                         if (!it->second.get())
 215                                                 ports_.erase(it->first);
 216                                 }
 217                                 catch (...)
 218                                 {
 219                                         CASPAR_LOG_CURRENT_EXCEPTION();
 220                                         ports_.erase(it->first);
 221                                 }
 222                         }
 223                 });
 224
 225                 graph_->set_value("consume-time", frame_timer.elapsed()*format_desc.fps*0.5);
 226         }
 227
 228         std::wstring print() const
 229         {
 230                 return L"output[" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";
 231         }
 232
 233         std::future<boost::property_tree::wptree> info()
 234         {
 235                 return std::move(executor_.begin_invoke([&]() -> boost::property_tree::wptree
 236                 {
 237                         boost::property_tree::wptree info;
 238                         for (auto& port : ports_)
 239                         {
 240                                 info.add_child(L"consumers.consumer", port.second.info())
 241                                         .add(L"index", port.first);
 242                         }
 243                         return info;
 244                 }, task_priority::high_priority));
 245         }
 246 };
 247
 248 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)){}
 249 void output::add(int index, const spl::shared_ptr<frame_consumer>& consumer){impl_->add(index, consumer);}
 250 void output::add(const spl::shared_ptr<frame_consumer>& consumer){impl_->add(consumer);}
 251 void output::remove(int index){impl_->remove(index);}
 252 void output::remove(const spl::shared_ptr<frame_consumer>& consumer){impl_->remove(consumer);}
 253 std::future<boost::property_tree::wptree> output::info() const{return impl_->info();}
 254 void output::operator()(const_frame frame, const video_format_desc& format_desc){(*impl_)(std::move(frame), format_desc);}
 255 monitor::subject& output::monitor_output() {return *impl_->monitor_subject_;}
 256 }}