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/utility/assert.h>\r
  34 #include <common/utility/timer.h>\r
  35 \r
  36 #include <concrt_extras.h>\r
  37 \r
  38 using namespace Concurrency;\r
  39 \r
  40 namespace caspar { namespace core {\r
  41         \r
  42 struct output::implementation\r
  43 {       \r
  44         typedef std::pair<safe_ptr<read_frame>, safe_ptr<read_frame>> fill_and_key;\r
  45         \r
  46         const video_format_desc format_desc_;\r
  47 \r
  48         std::map<int, safe_ptr<frame_consumer>> consumers_;\r
  49         typedef std::map<int, safe_ptr<frame_consumer>>::value_type layer_t;\r
  50         \r
  51         high_prec_timer timer_;\r
  52 \r
  53         critical_section                                mutex_;\r
  54         call<output::source_element_t>  output_;\r
  55 \r
  56         boost::circular_buffer<safe_ptr<read_frame>> frames_;\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                 // C-TODO: Consumers are destroyed asynchronously, need to wait for destruction to finish before callign initialize.\r
  69                 remove(index);\r
  70 \r
  71                 consumer->initialize(format_desc_);             \r
  72                 \r
  73                 {\r
  74                         critical_section::scoped_lock lock(mutex_);\r
  75 \r
  76                         consumers_.insert(std::make_pair(index, consumer));\r
  77 \r
  78                         CASPAR_LOG(info) << print() << L" " << consumer->print() << L" Added."; \r
  79                 }\r
  80         }\r
  81 \r
  82         void remove(int index)\r
  83         {\r
  84                 {\r
  85                         critical_section::scoped_lock lock(mutex_);\r
  86 \r
  87                         auto it = consumers_.find(index);\r
  88                         if(it != consumers_.end())\r
  89                         {\r
  90                                 CASPAR_LOG(info) << print() << L" " << it->second->print() << L" Removed.";\r
  91                                 consumers_.erase(it);\r
  92                         }\r
  93                 }\r
  94         }\r
  95 \r
  96         std::pair<size_t, size_t> minmax_buffer_depth() const\r
  97         {               \r
  98                 if(consumers_.empty())\r
  99                         return std::make_pair(0, 0);\r
 100                 std::vector<size_t> buffer_depths;\r
 101                 std::transform(consumers_.begin(), consumers_.end(), std::back_inserter(buffer_depths), [](const decltype(*consumers_.begin())& pair)\r
 102                 {\r
 103                         return pair.second->buffer_depth();\r
 104                 });\r
 105                 std::sort(buffer_depths.begin(), buffer_depths.end());\r
 106                 auto min = buffer_depths.front();\r
 107                 auto max = buffer_depths.back();\r
 108                 return std::make_pair(min, max);\r
 109         }\r
 110                                                 \r
 111         void execute(const output::source_element_t& element)\r
 112         {       \r
 113                 auto frame = element.first;\r
 114 \r
 115                 {\r
 116                         critical_section::scoped_lock lock(mutex_);             \r
 117                         \r
 118                         if(!has_synchronization_clock() || frame->image_size() != format_desc_.size)\r
 119                         {               \r
 120                                 scoped_oversubcription_token oversubscribe;\r
 121                                 timer_.tick(1.0/format_desc_.fps);\r
 122                         }\r
 123                                 \r
 124                         auto minmax = minmax_buffer_depth();\r
 125 \r
 126                         frames_.set_capacity(minmax.second - minmax.first + 1);\r
 127                         frames_.push_back(frame);\r
 128 \r
 129                         if(!frames_.full())\r
 130                                 return;\r
 131 \r
 132                         std::vector<int> removables;            \r
 133                         Concurrency::parallel_for_each(consumers_.begin(), consumers_.end(), [&](const decltype(*consumers_.begin())& pair)\r
 134                         {               \r
 135                                 try\r
 136                                 {\r
 137                                         auto consumer = pair.second;\r
 138 \r
 139                                         if(!consumer->send(frames_.at(consumer->buffer_depth()-minmax.first)))\r
 140                                                 removables.push_back(pair.first);\r
 141                                 }\r
 142                                 catch(...)\r
 143                                 {               \r
 144                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 145                                         CASPAR_LOG(error) << "Consumer error. Trying to recover:" << pair.second->print();\r
 146                                         try\r
 147                                         {\r
 148                                                 pair.second->initialize(format_desc_);\r
 149                                                 pair.second->send(frame);\r
 150                                         }\r
 151                                         catch(...)\r
 152                                         {\r
 153                                                 removables.push_back(pair.first);                               \r
 154                                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 155                                                 CASPAR_LOG(error) << "Failed to recover consumer: " << pair.second->print() << L". Removing it.";\r
 156                                         }\r
 157                                 }\r
 158                         });\r
 159 \r
 160                         BOOST_FOREACH(auto& removable, removables)\r
 161                                 consumers_.erase(removable);            \r
 162                 }\r
 163         }\r
 164 \r
 165 private:\r
 166         \r
 167         bool has_synchronization_clock()\r
 168         {\r
 169                 return std::any_of(consumers_.begin(), consumers_.end(), [](const decltype(*consumers_.begin())& p)\r
 170                 {\r
 171                         return p.second->has_synchronization_clock();\r
 172                 });\r
 173         }\r
 174         \r
 175         std::wstring print() const\r
 176         {\r
 177                 return L"output";\r
 178         }\r
 179 };\r
 180 \r
 181 output::output(output::source_t& source, const video_format_desc& format_desc) : impl_(new implementation(source, format_desc)){}\r
 182 void output::add(int index, safe_ptr<frame_consumer>&& consumer){impl_->add(index, std::move(consumer));}\r
 183 void output::remove(int index){impl_->remove(index);}\r
 184 }}