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 output::implementation\r
  45 {       \r
  46         typedef std::pair<safe_ptr<read_frame>, safe_ptr<read_frame>> fill_and_key;\r
  47         \r
  48         const video_format_desc format_desc_;\r
  49 \r
  50         std::map<int, safe_ptr<frame_consumer>> consumers_;\r
  51         typedef std::map<int, safe_ptr<frame_consumer>>::value_type layer_t;\r
  52         \r
  53         high_prec_timer timer_;\r
  54 \r
  55         critical_section                                                                mutex_;\r
  56         call<safe_ptr<message<safe_ptr<read_frame>>>>   output_;\r
  57                 \r
  58 public:\r
  59         implementation(output::source_t& source, const video_format_desc& format_desc) \r
  60                 : format_desc_(format_desc)\r
  61                 , output_(std::bind(&implementation::execute, this, std::placeholders::_1))\r
  62         {\r
  63                 source.link_target(&output_);\r
  64         }       \r
  65         \r
  66         void add(int index, safe_ptr<frame_consumer>&& consumer)\r
  67         {               \r
  68                 {\r
  69                         critical_section::scoped_lock lock(mutex_);\r
  70                         consumers_.erase(index);\r
  71                 }\r
  72 \r
  73                 consumer->initialize(format_desc_);\r
  74                 \r
  75                 {\r
  76                         critical_section::scoped_lock lock(mutex_);\r
  77                         consumers_.insert(std::make_pair(index, consumer));\r
  78 \r
  79                         CASPAR_LOG(info) << print() << L" " << consumer->print() << L" Added.";\r
  80                 }\r
  81         }\r
  82 \r
  83         void remove(int index)\r
  84         {\r
  85                 critical_section::scoped_lock lock(mutex_);\r
  86                 auto it = consumers_.find(index);\r
  87                 if(it != consumers_.end())\r
  88                 {\r
  89                         CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
  90                         consumers_.erase(it);\r
  91                 }\r
  92         }\r
  93                                                 \r
  94         void execute(const safe_ptr<message<safe_ptr<read_frame>>>& msg)\r
  95         {       \r
  96                 auto frame = msg->value();\r
  97 \r
  98                 critical_section::scoped_lock lock(mutex_);             \r
  99 \r
 100                 if(!has_synchronization_clock() || frame->image_size() != format_desc_.size)\r
 101                 {               \r
 102                         scoped_oversubcription_token oversubscribe;\r
 103                         timer_.tick(1.0/format_desc_.fps);\r
 104                 }\r
 105         \r
 106                 std::vector<int> removables;            \r
 107                 Concurrency::parallel_for_each(consumers_.begin(), consumers_.end(), [&](const decltype(*consumers_.begin())& pair)\r
 108                 {               \r
 109                         try\r
 110                         {\r
 111                                 if(!pair.second->send(frame))\r
 112                                         removables.push_back(pair.first);\r
 113                         }\r
 114                         catch(...)\r
 115                         {               \r
 116                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 117                                 CASPAR_LOG(error) << "Consumer error. Trying to recover:" << pair.second->print();\r
 118                                 try\r
 119                                 {\r
 120                                         pair.second->initialize(format_desc_);\r
 121                                         pair.second->send(frame);\r
 122                                 }\r
 123                                 catch(...)\r
 124                                 {\r
 125                                         removables.push_back(pair.first);                               \r
 126                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 127                                         CASPAR_LOG(error) << "Failed to recover consumer: " << pair.second->print() << L". Removing it.";\r
 128                                 }\r
 129                         }\r
 130                 });\r
 131 \r
 132                 BOOST_FOREACH(auto& removable, removables)\r
 133                         consumers_.erase(removable);                    \r
 134         }\r
 135 \r
 136 private:\r
 137         \r
 138         bool has_synchronization_clock()\r
 139         {\r
 140                 return std::any_of(consumers_.begin(), consumers_.end(), [](const decltype(*consumers_.begin())& p)\r
 141                 {\r
 142                         return p.second->has_synchronization_clock();\r
 143                 });\r
 144         }\r
 145         \r
 146         std::wstring print() const\r
 147         {\r
 148                 return L"output";\r
 149         }\r
 150 };\r
 151 \r
 152 output::output(output::source_t& source, const video_format_desc& format_desc) : impl_(new implementation(source, format_desc)){}\r
 153 void output::add(int index, safe_ptr<frame_consumer>&& consumer){impl_->add(index, std::move(consumer));}\r
 154 void output::remove(int index){impl_->remove(index);}\r
 155 }}