git.sesse.net Git - casparcg/blob - core/producer/layer.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 "layer.h"\r
  25 \r
  26 #include "frame_producer.h"\r
  27 \r
  28 #include "../video_format.h"\r
  29 #include "../frame/draw_frame.h"\r
  30 #include "../frame/frame_transform.h"\r
  31 \r
  32 #include <boost/optional.hpp>\r
  33 #include <boost/thread/future.hpp>\r
  34 \r
  35 namespace caspar { namespace core {\r
  36 \r
  37 struct layer::impl\r
  38 {                               \r
  39         monitor::basic_subject                          event_subject_;\r
  40         monitor::basic_subject                          foreground_event_subject_;\r
  41         monitor::basic_subject                          background_event_subject_;\r
  42         spl::shared_ptr<frame_producer>         foreground_;\r
  43         spl::shared_ptr<frame_producer>         background_;\r
  44         int64_t                                                         frame_number_;\r
  45         boost::optional<int32_t>                        auto_play_delta_;\r
  46         bool                                                            is_paused_;\r
  47 \r
  48 public:\r
  49         impl(int index) \r
  50                 : event_subject_(monitor::path("layer") % index)\r
  51                 , foreground_event_subject_("")\r
  52                 , background_event_subject_("background")\r
  53                 , foreground_(frame_producer::empty())\r
  54                 , background_(frame_producer::empty())\r
  55                 , frame_number_(0)\r
  56                 , is_paused_(false)\r
  57         {\r
  58                 foreground_event_subject_.subscribe(event_subject_);\r
  59                 background_event_subject_.subscribe(event_subject_);\r
  60         }\r
  61 \r
  62         void pause()\r
  63         {\r
  64                 is_paused_ = true;\r
  65         }\r
  66 \r
  67         void resume()\r
  68         {\r
  69                 is_paused_ = false;\r
  70         }\r
  71 \r
  72         void load(spl::shared_ptr<frame_producer> producer, bool preview, const boost::optional<int32_t>& auto_play_delta)\r
  73         {               \r
  74                 background_->unsubscribe(background_event_subject_);\r
  75                 background_ = std::move(producer);\r
  76                 background_->subscribe(background_event_subject_);\r
  77 \r
  78                 auto_play_delta_ = auto_play_delta;\r
  79 \r
  80                 if(preview)\r
  81                 {\r
  82                         play();\r
  83                         foreground_->receive(0);\r
  84                         pause();\r
  85                 }\r
  86 \r
  87                 if(auto_play_delta_ && foreground_ == frame_producer::empty())\r
  88                         play();\r
  89         }\r
  90         \r
  91         void play()\r
  92         {                       \r
  93                 if(background_ != frame_producer::empty())\r
  94                 {\r
  95                         background_->leading_producer(foreground_);\r
  96 \r
  97                         background_->unsubscribe(background_event_subject_);\r
  98                         foreground_->unsubscribe(foreground_event_subject_);\r
  99 \r
 100                         foreground_ = std::move(background_);\r
 101                         background_ = std::move(frame_producer::empty());\r
 102                         \r
 103                         foreground_->subscribe(foreground_event_subject_);\r
 104 \r
 105                         frame_number_   = 0;\r
 106                         auto_play_delta_.reset();\r
 107                 }\r
 108 \r
 109                 resume();\r
 110         }\r
 111         \r
 112         void stop()\r
 113         {\r
 114                 foreground_->unsubscribe(foreground_event_subject_);\r
 115 \r
 116                 foreground_ = std::move(frame_producer::empty());\r
 117 \r
 118                 frame_number_   = 0;\r
 119                 auto_play_delta_.reset();\r
 120 \r
 121                 pause();\r
 122         }\r
 123                 \r
 124         draw_frame receive(frame_producer::flags flags, const video_format_desc& format_desc)\r
 125         {               \r
 126                 try\r
 127                 {\r
 128                         if(is_paused_)\r
 129                                 return foreground_->last_frame();\r
 130                 \r
 131                         auto frame = foreground_->receive(flags.value());\r
 132 \r
 133                         if(frame == core::draw_frame::late())\r
 134                                 return foreground_->last_frame();\r
 135                         \r
 136                         if(frame == core::draw_frame::eof())\r
 137                         {       \r
 138                                 stop();\r
 139                                 return core::draw_frame::empty();\r
 140                         }\r
 141                         \r
 142                         ++frame_number_;\r
 143 \r
 144                         if(auto_play_delta_)\r
 145                         {\r
 146                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - frame_number_ - static_cast<int64_t>(*auto_play_delta_);\r
 147                                 if(frames_left < 1)\r
 148                                 {\r
 149                                         play();\r
 150                                         return receive(flags, format_desc);\r
 151                                 }\r
 152                         }\r
 153 \r
 154                         event_subject_  << monitor::event("state")      % u8(is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"))                                                       \r
 155                                                         << monitor::event("time")       % monitor::duration(frame_number_/format_desc.fps)\r
 156                                                                                                                 % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)\r
 157                                                         << monitor::event("frame")      % static_cast<int64_t>(frame_number_)\r
 158                                                                                                                 % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));\r
 159 \r
 160                         foreground_event_subject_ << monitor::event("type") % foreground_->name();\r
 161                         background_event_subject_ << monitor::event("type") % background_->name();\r
 162                                 \r
 163                         return frame;\r
 164                 }\r
 165                 catch(...)\r
 166                 {\r
 167                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 168                         stop();\r
 169                         return core::draw_frame::empty();\r
 170                 }\r
 171         }\r
 172         \r
 173         boost::property_tree::wptree info() const\r
 174         {\r
 175                 boost::property_tree::wptree info;\r
 176                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 177                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));\r
 178                 info.add(L"frame-number", frame_number_);\r
 179 \r
 180                 auto nb_frames = foreground_->nb_frames();\r
 181 \r
 182                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 183                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - (auto_play_delta_ ? *auto_play_delta_ : 0)));\r
 184                 info.add_child(L"producer", foreground_->info());\r
 185                 info.add_child(L"background.producer", background_->info());\r
 186                 return info;\r
 187         }\r
 188 };\r
 189 \r
 190 layer::layer(int index) : impl_(new impl(index)){}\r
 191 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 192 layer& layer::operator=(layer&& other)\r
 193 {\r
 194         other.swap(*this);\r
 195         return *this;\r
 196 }\r
 197 void layer::swap(layer& other)\r
 198 {       \r
 199         impl_.swap(other.impl_);\r
 200 }\r
 201 void layer::load(spl::shared_ptr<frame_producer> frame_producer, bool preview, const boost::optional<int32_t>& auto_play_delta){return impl_->load(std::move(frame_producer), preview, auto_play_delta);}       \r
 202 void layer::play(){impl_->play();}\r
 203 void layer::pause(){impl_->pause();}\r
 204 void layer::stop(){impl_->stop();}\r
 205 draw_frame layer::receive(frame_producer::flags flags, const video_format_desc& format_desc) {return impl_->receive(flags, format_desc);}\r
 206 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 207 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 208 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 209 void layer::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}\r
 210 void layer::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}\r
 211 }}