git.sesse.net Git - casparcg/blob - core/producer/channel/channel_producer.cpp

   1 /*\r
   2 * Copyright 2013 Sveriges Television AB http://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 "channel_producer.h"\r
  25 \r
  26 #include "../../monitor/monitor.h"\r
  27 #include "../../consumer/frame_consumer.h"\r
  28 #include "../../consumer/output.h"\r
  29 #include "../../video_channel.h"\r
  30 \r
  31 #include "../frame/basic_frame.h"\r
  32 #include "../frame/frame_factory.h"\r
  33 #include "../../mixer/write_frame.h"\r
  34 #include "../../mixer/read_frame.h"\r
  35 \r
  36 #include <common/exception/exceptions.h>\r
  37 #include <common/memory/memcpy.h>\r
  38 #include <common/concurrency/future_util.h>\r
  39 \r
  40 #include <tbb/concurrent_queue.h>\r
  41 \r
  42 namespace caspar { namespace core {\r
  43 \r
  44 class channel_consumer : public frame_consumer\r
  45 {       \r
  46         tbb::concurrent_bounded_queue<std::shared_ptr<read_frame>>      frame_buffer_;\r
  47         core::video_format_desc                                                                         format_desc_;\r
  48         int                                                                                                                     channel_index_;\r
  49         tbb::atomic<bool>                                                                                       is_running_;\r
  50         tbb::atomic<int64_t>                                                                            current_age_;\r
  51 \r
  52 public:\r
  53         channel_consumer() \r
  54         {\r
  55                 is_running_ = true;\r
  56                 current_age_ = 0;\r
  57                 frame_buffer_.set_capacity(3);\r
  58         }\r
  59 \r
  60         ~channel_consumer()\r
  61         {\r
  62                 stop();\r
  63         }\r
  64 \r
  65         // frame_consumer\r
  66 \r
  67         virtual boost::unique_future<bool> send(const safe_ptr<read_frame>& frame) override\r
  68         {\r
  69                 frame_buffer_.try_push(frame);\r
  70                 return caspar::wrap_as_future(is_running_.load());\r
  71         }\r
  72 \r
  73         virtual void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
  74         {\r
  75                 format_desc_    = format_desc;\r
  76                 channel_index_  = channel_index;\r
  77         }\r
  78 \r
  79         virtual int64_t presentation_frame_age_millis() const override\r
  80         {\r
  81                 return current_age_;\r
  82         }\r
  83 \r
  84         virtual std::wstring print() const override\r
  85         {\r
  86                 return L"[channel-consumer|" + boost::lexical_cast<std::wstring>(channel_index_) + L"]";\r
  87         }\r
  88 \r
  89         virtual boost::property_tree::wptree info() const override\r
  90         {\r
  91                 boost::property_tree::wptree info;\r
  92                 info.add(L"type", L"channel-consumer");\r
  93                 info.add(L"channel-index", channel_index_);\r
  94                 return info;\r
  95         }\r
  96         \r
  97         virtual bool has_synchronization_clock() const override\r
  98         {\r
  99                 return false;\r
 100         }\r
 101 \r
 102         virtual size_t buffer_depth() const override\r
 103         {\r
 104                 return 1;\r
 105         }\r
 106 \r
 107         virtual int index() const override\r
 108         {\r
 109                 return 78500 + channel_index_;\r
 110         }\r
 111 \r
 112         // channel_consumer\r
 113 \r
 114         void stop()\r
 115         {\r
 116                 is_running_ = false;\r
 117                 frame_buffer_.try_push(make_safe<read_frame>());\r
 118         }\r
 119         \r
 120         const core::video_format_desc& get_video_format_desc()\r
 121         {\r
 122                 return format_desc_;\r
 123         }\r
 124 \r
 125         std::shared_ptr<read_frame> receive()\r
 126         {\r
 127                 if(!is_running_)\r
 128                         return make_safe<read_frame>();\r
 129                 std::shared_ptr<read_frame> frame;\r
 130                 frame_buffer_.try_pop(frame);\r
 131                 current_age_ = frame->get_age_millis();\r
 132                 return frame;\r
 133         }\r
 134 };\r
 135         \r
 136 class channel_producer : public frame_producer\r
 137 {\r
 138         monitor::subject                                        monitor_subject_;\r
 139 \r
 140         const safe_ptr<frame_factory>           frame_factory_;\r
 141         const safe_ptr<channel_consumer>        consumer_;\r
 142 \r
 143         std::queue<safe_ptr<basic_frame>>       frame_buffer_;\r
 144         safe_ptr<basic_frame>                           last_frame_;\r
 145         uint64_t                                                        frame_number_;\r
 146 \r
 147 public:\r
 148         explicit channel_producer(const safe_ptr<frame_factory>& frame_factory, const safe_ptr<video_channel>& channel) \r
 149                 : frame_factory_(frame_factory)\r
 150                 , consumer_(make_safe<channel_consumer>())\r
 151                 , last_frame_(basic_frame::empty())\r
 152                 , frame_number_(0)\r
 153         {\r
 154                 channel->output()->add(consumer_);\r
 155                 CASPAR_LOG(info) << print() << L" Initialized";\r
 156         }\r
 157 \r
 158         ~channel_producer()\r
 159         {\r
 160                 consumer_->stop();\r
 161                 CASPAR_LOG(info) << print() << L" Uninitialized";\r
 162         }\r
 163 \r
 164         // frame_producer\r
 165                         \r
 166         virtual safe_ptr<basic_frame> receive(int) override\r
 167         {\r
 168                 auto format_desc = consumer_->get_video_format_desc();\r
 169 \r
 170                 if(frame_buffer_.size() > 1)\r
 171                 {\r
 172                         auto frame = frame_buffer_.front();\r
 173                         frame_buffer_.pop();\r
 174                         return last_frame_ = frame;\r
 175                 }\r
 176                 \r
 177                 auto read_frame = consumer_->receive();\r
 178                 if(!read_frame || read_frame->image_data().empty())\r
 179                         return basic_frame::late();             \r
 180 \r
 181                 frame_number_++;\r
 182                 \r
 183                 core::pixel_format_desc desc;\r
 184                 bool double_speed       = std::abs(frame_factory_->get_video_format_desc().fps / 2.0 - format_desc.fps) < 0.01;         \r
 185                 bool half_speed         = std::abs(format_desc.fps / 2.0 - frame_factory_->get_video_format_desc().fps) < 0.01;\r
 186 \r
 187                 if(half_speed && frame_number_ % 2 == 0) // Skip frame\r
 188                         return receive(0);\r
 189 \r
 190                 desc.pix_fmt = core::pixel_format::bgra;\r
 191                 desc.planes.push_back(core::pixel_format_desc::plane(format_desc.width, format_desc.height, 4));\r
 192                 auto frame = frame_factory_->create_frame(this, desc);\r
 193 \r
 194                 fast_memcpy(frame->image_data().begin(), read_frame->image_data().begin(), read_frame->image_data().size());\r
 195                 frame->commit();\r
 196 \r
 197                 frame_buffer_.push(frame);      \r
 198                 \r
 199                 if(double_speed)        \r
 200                         frame_buffer_.push(frame);\r
 201 \r
 202                 return receive(0);\r
 203         }       \r
 204 \r
 205         virtual safe_ptr<basic_frame> last_frame() const override\r
 206         {\r
 207                 return last_frame_; \r
 208         }       \r
 209 \r
 210         virtual std::wstring print() const override\r
 211         {\r
 212                 return L"channel[]";\r
 213         }\r
 214 \r
 215         virtual boost::property_tree::wptree info() const override\r
 216         {\r
 217                 boost::property_tree::wptree info;\r
 218                 info.add(L"type", L"channel-producer");\r
 219                 return info;\r
 220         }\r
 221 \r
 222         monitor::source& monitor_output() \r
 223         {\r
 224                 return monitor_subject_;\r
 225         }\r
 226 };\r
 227 \r
 228 safe_ptr<frame_producer> create_channel_producer(const safe_ptr<core::frame_factory>& frame_factory, const safe_ptr<video_channel>& channel)\r
 229 {\r
 230         return create_producer_print_proxy(\r
 231                         make_safe<channel_producer>(frame_factory, channel));\r
 232 }\r
 233 \r
 234 }}