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