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