git.sesse.net Git - casparcg/blob - core/consumer/output.cpp

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\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 */\r
  20 // TODO: Try to recover consumer from bad_alloc...\r
  21 #include "../StdAfx.h"\r
  22 \r
  23 #ifdef _MSC_VER\r
  24 #pragma warning (disable : 4244)\r
  25 #endif\r
  26 \r
  27 #include "output.h"\r
  28 \r
  29 #include "../video_format.h"\r
  30 #include "../mixer/gpu/ogl_device.h"\r
  31 #include "../mixer/read_frame.h"\r
  32 \r
  33 #include <common/concurrency/executor.h>\r
  34 #include <common/utility/assert.h>\r
  35 #include <common/utility/timer.h>\r
  36 #include <common/memory/memshfl.h>\r
  37 \r
  38 #include <concrt_extras.h>\r
  39 \r
  40 using namespace Concurrency;\r
  41 \r
  42 namespace caspar { namespace core {\r
  43         \r
  44 struct destruction_context\r
  45 {\r
  46         std::shared_ptr<frame_consumer> consumer;\r
  47         Concurrency::event                              event;\r
  48 \r
  49         destruction_context(std::shared_ptr<frame_consumer>&& consumer) \r
  50                 : consumer(consumer)\r
  51         {\r
  52         }\r
  53 };\r
  54 \r
  55 void __cdecl destroy_consumer(LPVOID lpParam)\r
  56 {\r
  57         auto destruction = std::unique_ptr<destruction_context>(static_cast<destruction_context*>(lpParam));\r
  58         \r
  59         try\r
  60         {               \r
  61                 if(destruction->consumer.unique())\r
  62                 {\r
  63                         Concurrency::scoped_oversubcription_token oversubscribe;\r
  64                         destruction->consumer.reset();\r
  65                 }\r
  66                 else\r
  67                         CASPAR_LOG(warning) << destruction->consumer->print() << " Not destroyed asynchronously.";              \r
  68         }\r
  69         catch(...)\r
  70         {\r
  71                 CASPAR_LOG_CURRENT_EXCEPTION();\r
  72         }\r
  73         \r
  74         destruction->event.set();\r
  75 }\r
  76 \r
  77 void __cdecl destroy_and_wait_consumer(LPVOID lpParam)\r
  78 {\r
  79         try\r
  80         {\r
  81                 auto destruction = static_cast<destruction_context*>(lpParam);\r
  82                 Concurrency::CurrentScheduler::ScheduleTask(destroy_consumer, lpParam);\r
  83                 if(destruction->event.wait(1000) == Concurrency::COOPERATIVE_WAIT_TIMEOUT)\r
  84                         CASPAR_LOG(warning) << " Potential destruction deadlock detected. Might leak resources.";\r
  85         }\r
  86         catch(...)\r
  87         {\r
  88                 CASPAR_LOG_CURRENT_EXCEPTION();\r
  89         }\r
  90 }\r
  91 \r
  92 struct output::implementation\r
  93 {       \r
  94         typedef std::pair<safe_ptr<read_frame>, safe_ptr<read_frame>> fill_and_key;\r
  95         \r
  96         const video_format_desc format_desc_;\r
  97 \r
  98         std::map<int, safe_ptr<frame_consumer>> consumers_;\r
  99         typedef std::map<int, safe_ptr<frame_consumer>>::value_type layer_t;\r
 100         \r
 101         high_prec_timer timer_;\r
 102 \r
 103         critical_section                                                                mutex_;\r
 104         call<safe_ptr<message<safe_ptr<read_frame>>>>   output_;\r
 105                 \r
 106 public:\r
 107         implementation(output::source_t& source, const video_format_desc& format_desc) \r
 108                 : format_desc_(format_desc)\r
 109                 , output_(std::bind(&implementation::execute, this, std::placeholders::_1))\r
 110         {\r
 111                 source.link_target(&output_);\r
 112         }       \r
 113         \r
 114         void add(int index, safe_ptr<frame_consumer>&& consumer)\r
 115         {               \r
 116                 {\r
 117                         critical_section::scoped_lock lock(mutex_);\r
 118                         consumers_.erase(index);\r
 119                 }\r
 120 \r
 121                 consumer->initialize(format_desc_);\r
 122                 \r
 123                 {\r
 124                         critical_section::scoped_lock lock(mutex_);\r
 125                         consumers_.insert(std::make_pair(index, consumer));\r
 126 \r
 127                         CASPAR_LOG(info) << print() << L" " << consumer->print() << L" Added.";\r
 128                 }\r
 129         }\r
 130 \r
 131         void remove(int index)\r
 132         {\r
 133                 critical_section::scoped_lock lock(mutex_);\r
 134                 auto it = consumers_.find(index);\r
 135                 if(it != consumers_.end())\r
 136                 {\r
 137                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
 138                         consumers_.erase(it);\r
 139                 }\r
 140         }\r
 141                                                 \r
 142         void execute(const safe_ptr<message<safe_ptr<read_frame>>>& msg)\r
 143         {       \r
 144                 auto frame = msg->value();\r
 145 \r
 146                 critical_section::scoped_lock lock(mutex_);             \r
 147 \r
 148                 if(!has_synchronization_clock() || frame->image_size() != format_desc_.size)\r
 149                 {               \r
 150                         scoped_oversubcription_token oversubscribe;\r
 151                         timer_.tick(1.0/format_desc_.fps);\r
 152                 }\r
 153                 \r
 154                 std::vector<int> removables;            \r
 155                 Concurrency::parallel_for_each(consumers_.begin(), consumers_.end(), [&](const decltype(*consumers_.begin())& pair)\r
 156                 {               \r
 157                         try\r
 158                         {\r
 159                                 if(!pair.second->send(frame))\r
 160                                         removables.push_back(pair.first);\r
 161                         }\r
 162                         catch(...)\r
 163                         {               \r
 164                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 165                                 CASPAR_LOG(error) << "Consumer error. Trying to recover:" << pair.second->print();\r
 166                                 try\r
 167                                 {\r
 168                                         pair.second->initialize(format_desc_);\r
 169                                         pair.second->send(frame);\r
 170                                 }\r
 171                                 catch(...)\r
 172                                 {\r
 173                                         removables.push_back(pair.first);                               \r
 174                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 175                                         CASPAR_LOG(error) << "Failed to recover consumer: " << pair.second->print() << L". Removing it.";\r
 176                                 }\r
 177                         }\r
 178                 });\r
 179 \r
 180                 BOOST_FOREACH(auto& removable, removables)\r
 181                 {\r
 182                         std::shared_ptr<frame_consumer> consumer = consumers_.find(removable)->second;\r
 183                         consumers_.erase(removable);                    \r
 184                         Concurrency::CurrentScheduler::ScheduleTask(destroy_consumer, new destruction_context(std::move(consumer)));\r
 185                 }\r
 186         }\r
 187 \r
 188 private:\r
 189         \r
 190         bool has_synchronization_clock()\r
 191         {\r
 192                 return std::any_of(consumers_.begin(), consumers_.end(), [](const decltype(*consumers_.begin())& p)\r
 193                 {\r
 194                         return p.second->has_synchronization_clock();\r
 195                 });\r
 196         }\r
 197         \r
 198         std::wstring print() const\r
 199         {\r
 200                 return L"output";\r
 201         }\r
 202 };\r
 203 \r
 204 output::output(output::source_t& source, const video_format_desc& format_desc) : impl_(new implementation(source, format_desc)){}\r
 205 void output::add(int index, safe_ptr<frame_consumer>&& consumer){impl_->add(index, std::move(consumer));}\r
 206 void output::remove(int index){impl_->remove(index);}\r
 207 }}