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

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../StdAfx.h"\r
  23 \r
  24 #include "frame_consumer.h"\r
  25 \r
  26 #include <common/except.h>\r
  27 \r
  28 #include <core/video_format.h>\r
  29 #include <core/frame/frame.h>\r
  30 \r
  31 #include <boost/thread.hpp>\r
  32 \r
  33 namespace caspar { namespace core {\r
  34                 \r
  35 std::vector<const consumer_factory_t> g_factories;\r
  36 \r
  37 void register_consumer_factory(const consumer_factory_t& factory)\r
  38 {\r
  39         g_factories.push_back(factory);\r
  40 }\r
  41 \r
  42 class destroy_consumer_proxy : public frame_consumer\r
  43 {       \r
  44         std::shared_ptr<frame_consumer> consumer_;\r
  45 public:\r
  46         destroy_consumer_proxy(spl::shared_ptr<frame_consumer>&& consumer) \r
  47                 : consumer_(std::move(consumer))\r
  48         {\r
  49         }\r
  50 \r
  51         ~destroy_consumer_proxy()\r
  52         {               \r
  53                 static tbb::atomic<int> counter = tbb::atomic<int>();\r
  54                         \r
  55                 ++counter;\r
  56                 CASPAR_VERIFY(counter < 8);\r
  57                 \r
  58                 auto consumer = new std::shared_ptr<frame_consumer>(std::move(consumer_));\r
  59                 boost::thread([=]\r
  60                 {\r
  61                         std::unique_ptr<std::shared_ptr<frame_consumer>> pointer_guard(consumer);\r
  62 \r
  63                         auto str = (*consumer)->print();\r
  64                         try\r
  65                         {\r
  66                                 if(!consumer->unique())\r
  67                                         CASPAR_LOG(trace) << str << L" Not destroyed on asynchronous destruction thread: " << consumer->use_count();\r
  68                                 else\r
  69                                         CASPAR_LOG(trace) << str << L" Destroying on asynchronous destruction thread.";\r
  70                         }\r
  71                         catch(...){}\r
  72 \r
  73                         pointer_guard.reset();\r
  74 \r
  75                         --counter;\r
  76                 }).detach(); \r
  77         }\r
  78         \r
  79         virtual bool send(const_frame frame) override                                                                                                   {return consumer_->send(std::move(frame));}\r
  80         virtual void initialize(const struct video_format_desc& format_desc, int channel_index) override        {return consumer_->initialize(format_desc, channel_index);}\r
  81         virtual std::wstring print() const override                                                                                                                     {return consumer_->print();}    \r
  82         virtual std::wstring name() const override                                                                                                                      {return consumer_->name();}\r
  83         virtual boost::property_tree::wptree info() const override                                                                                      {return consumer_->info();}\r
  84         virtual bool has_synchronization_clock() const override                                                                                         {return consumer_->has_synchronization_clock();}\r
  85         virtual int buffer_depth() const override                                                                                                                       {return consumer_->buffer_depth();}\r
  86         virtual int index() const override                                                                                                                                      {return consumer_->index();}\r
  87 };\r
  88 \r
  89 class print_consumer_proxy : public frame_consumer\r
  90 {       \r
  91         std::shared_ptr<frame_consumer> consumer_;\r
  92 public:\r
  93         print_consumer_proxy(spl::shared_ptr<frame_consumer>&& consumer) \r
  94                 : consumer_(std::move(consumer))\r
  95         {\r
  96                 CASPAR_LOG(info) << consumer_->print() << L" Initialized.";\r
  97         }\r
  98 \r
  99         ~print_consumer_proxy()\r
 100         {               \r
 101                 auto str = consumer_->print();\r
 102                 CASPAR_LOG(trace) << str << L" Uninitializing.";\r
 103                 consumer_.reset();\r
 104                 CASPAR_LOG(info) << str << L" Uninitialized.";\r
 105         }\r
 106         \r
 107         virtual bool send(const_frame frame) override                                                                                                   {return consumer_->send(std::move(frame));}\r
 108         virtual void initialize(const struct video_format_desc& format_desc, int channel_index) override        {return consumer_->initialize(format_desc, channel_index);}\r
 109         virtual std::wstring print() const override                                                                                                                     {return consumer_->print();}\r
 110         virtual std::wstring name() const override                                                                                                                      {return consumer_->name();}\r
 111         virtual boost::property_tree::wptree info() const override                                                                                      {return consumer_->info();}\r
 112         virtual bool has_synchronization_clock() const override                                                                                         {return consumer_->has_synchronization_clock();}\r
 113         virtual int buffer_depth() const override                                                                                                                       {return consumer_->buffer_depth();}\r
 114         virtual int index() const override                                                                                                                                      {return consumer_->index();}\r
 115 };\r
 116 \r
 117 class recover_consumer_proxy : public frame_consumer\r
 118 {       \r
 119         std::shared_ptr<frame_consumer> consumer_;\r
 120         int                                                             channel_index_;\r
 121         video_format_desc                               format_desc_;\r
 122 public:\r
 123         recover_consumer_proxy(spl::shared_ptr<frame_consumer>&& consumer) \r
 124                 : consumer_(std::move(consumer))\r
 125         {\r
 126         }\r
 127         \r
 128         virtual bool send(const_frame frame)                                    \r
 129         {\r
 130                 try\r
 131                 {\r
 132                         return consumer_->send(frame);\r
 133                 }\r
 134                 catch(...)\r
 135                 {\r
 136                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 137                         try\r
 138                         {\r
 139                                 consumer_->initialize(format_desc_, channel_index_);\r
 140                                 return consumer_->send(frame);\r
 141                         }\r
 142                         catch(...)\r
 143                         {\r
 144                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 145                                 CASPAR_LOG(error) << print() << "Failed to recover consumer.";\r
 146                                 return false;\r
 147                         }\r
 148                 }\r
 149         }\r
 150 \r
 151         virtual void initialize(const struct video_format_desc& format_desc, int channel_index)         \r
 152         {\r
 153                 format_desc_    = format_desc;\r
 154                 channel_index_  = channel_index;\r
 155                 return consumer_->initialize(format_desc, channel_index);\r
 156         }\r
 157 \r
 158         virtual std::wstring print() const override                                     {return consumer_->print();}\r
 159         virtual std::wstring name() const override                                      {return consumer_->name();}\r
 160         virtual boost::property_tree::wptree info() const override      {return consumer_->info();}\r
 161         virtual bool has_synchronization_clock() const override         {return consumer_->has_synchronization_clock();}\r
 162         virtual int buffer_depth() const override                                       {return consumer_->buffer_depth();}\r
 163         virtual int index() const override                                                      {return consumer_->index();}\r
 164 };\r
 165 \r
 166 // This class is used to guarantee that audio cadence is correct. This is important for NTSC audio.\r
 167 class cadence_guard : public frame_consumer\r
 168 {\r
 169         spl::shared_ptr<frame_consumer>         consumer_;\r
 170         std::vector<int>                                        audio_cadence_;\r
 171         boost::circular_buffer<std::size_t>     sync_buffer_;\r
 172 public:\r
 173         cadence_guard(const spl::shared_ptr<frame_consumer>& consumer)\r
 174                 : consumer_(consumer)\r
 175         {\r
 176         }\r
 177         \r
 178         virtual void initialize(const video_format_desc& format_desc, int channel_index) override\r
 179         {\r
 180                 audio_cadence_  = format_desc.audio_cadence;\r
 181                 sync_buffer_    = boost::circular_buffer<std::size_t>(format_desc.audio_cadence.size());\r
 182                 consumer_->initialize(format_desc, channel_index);\r
 183         }\r
 184 \r
 185         virtual bool send(const_frame frame) override\r
 186         {               \r
 187                 if(audio_cadence_.size() == 1)\r
 188                         return consumer_->send(frame);\r
 189 \r
 190                 bool result = true;\r
 191                 \r
 192                 if(boost::range::equal(sync_buffer_, audio_cadence_) && audio_cadence_.front() == static_cast<int>(frame.audio_data().size())) \r
 193                 {       \r
 194                         // Audio sent so far is in sync, now we can send the next chunk.\r
 195                         result = consumer_->send(frame);\r
 196                         boost::range::rotate(audio_cadence_, std::begin(audio_cadence_)+1);\r
 197                 }\r
 198                 else\r
 199                         CASPAR_LOG(trace) << print() << L" Syncing audio.";\r
 200 \r
 201                 sync_buffer_.push_back(static_cast<int>(frame.audio_data().size()));\r
 202                 \r
 203                 return result;\r
 204         }\r
 205         \r
 206         virtual std::wstring print() const override                                     {return consumer_->print();}\r
 207         virtual std::wstring name() const override                                      {return consumer_->name();}\r
 208         virtual boost::property_tree::wptree info() const override      {return consumer_->info();}\r
 209         virtual bool has_synchronization_clock() const override         {return consumer_->has_synchronization_clock();}\r
 210         virtual int buffer_depth() const override                                       {return consumer_->buffer_depth();}\r
 211         virtual int index() const override                                                      {return consumer_->index();}\r
 212 };\r
 213 \r
 214 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 215 {\r
 216         if(params.empty())\r
 217                 BOOST_THROW_EXCEPTION(invalid_argument() << arg_name_info("params") << arg_value_info(""));\r
 218         \r
 219         auto consumer = frame_consumer::empty();\r
 220         std::any_of(g_factories.begin(), g_factories.end(), [&](const consumer_factory_t& factory) -> bool\r
 221                 {\r
 222                         try\r
 223                         {\r
 224                                 consumer = factory(params);\r
 225                         }\r
 226                         catch(...)\r
 227                         {\r
 228                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 229                         }\r
 230                         return consumer != frame_consumer::empty();\r
 231                 });\r
 232 \r
 233         if(consumer == frame_consumer::empty())\r
 234                 BOOST_THROW_EXCEPTION(file_not_found() << msg_info("No match found for supplied commands. Check syntax."));\r
 235 \r
 236         return spl::make_shared<destroy_consumer_proxy>(\r
 237                         spl::make_shared<print_consumer_proxy>(\r
 238                          spl::make_shared<recover_consumer_proxy>(\r
 239                           spl::make_shared<cadence_guard>(\r
 240                            std::move(consumer)))));\r
 241 }\r
 242 \r
 243 const spl::shared_ptr<frame_consumer>& frame_consumer::empty()\r
 244 {\r
 245         class empty_frame_consumer : public frame_consumer\r
 246         {\r
 247         public:\r
 248                 virtual bool send(const_frame) override {return false;}\r
 249                 virtual void initialize(const video_format_desc&, int) override{}\r
 250                 virtual std::wstring print() const override {return L"empty";}\r
 251                 virtual std::wstring name() const override {return L"empty";}\r
 252                 virtual bool has_synchronization_clock() const override {return false;}\r
 253                 virtual int buffer_depth() const override {return 0;};\r
 254                 virtual int index() const{return -1;}\r
 255                 virtual boost::property_tree::wptree info() const override\r
 256                 {\r
 257                         boost::property_tree::wptree info;\r
 258                         info.add(L"type", L"empty");\r
 259                         return info;\r
 260                 }\r
 261         };\r
 262         static spl::shared_ptr<frame_consumer> consumer = spl::make_shared<empty_frame_consumer>();\r
 263         return consumer;\r
 264 }\r
 265 \r
 266 }}