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::subject                                event_subject_;\r
  40         spl::shared_ptr<frame_producer> foreground_;\r
  41         spl::shared_ptr<frame_producer> background_;\r
  42         int64_t                                                 frame_number_;\r
  43         boost::optional<int32_t>                auto_play_delta_;\r
  44         bool                                                    is_paused_;\r
  45 \r
  46 public:\r
  47         impl(int index) \r
  48                 : event_subject_(monitor::path("layer") % index)\r
  49                 , foreground_(frame_producer::empty())\r
  50                 , background_(frame_producer::empty())\r
  51                 , frame_number_(0)\r
  52                 , is_paused_(false)\r
  53         {\r
  54         }\r
  55         \r
  56         void pause()\r
  57         {\r
  58                 is_paused_ = true;\r
  59         }\r
  60 \r
  61         void resume()\r
  62         {\r
  63                 is_paused_ = false;\r
  64         }\r
  65 \r
  66         void load(spl::shared_ptr<frame_producer> producer, const boost::optional<int32_t>& auto_play_delta)\r
  67         {               \r
  68                 background_              = std::move(producer);\r
  69                 auto_play_delta_ = auto_play_delta;\r
  70 \r
  71                 if(auto_play_delta_ && foreground_ == frame_producer::empty())\r
  72                         play();\r
  73         }\r
  74         \r
  75         void play()\r
  76         {                       \r
  77                 if(background_ != frame_producer::empty())\r
  78                 {\r
  79                         background_->set_leading_producer(foreground_);\r
  80                         foreground_             = background_;\r
  81                         background_             = frame_producer::empty();\r
  82                         frame_number_   = 0;\r
  83                         auto_play_delta_.reset();\r
  84                 }\r
  85 \r
  86                 resume();\r
  87         }\r
  88         \r
  89         void stop()\r
  90         {\r
  91                 foreground_             = frame_producer::empty();\r
  92                 frame_number_   = 0;\r
  93                 auto_play_delta_.reset();\r
  94 \r
  95                 pause();\r
  96         }\r
  97                 \r
  98         spl::shared_ptr<draw_frame> receive(frame_producer::flags flags, const video_format_desc& format_desc)\r
  99         {               \r
 100                 try\r
 101                 {\r
 102                         if(is_paused_)\r
 103                                 return draw_frame::mute(foreground_->last_frame());\r
 104                 \r
 105                         auto frame = foreground_->receive(flags.value());\r
 106                         if(frame == core::draw_frame::late())\r
 107                                 return foreground_->last_frame();\r
 108                         \r
 109                         ++frame_number_;\r
 110 \r
 111                         if(auto_play_delta_)\r
 112                         {\r
 113                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - frame_number_ - static_cast<int64_t>(*auto_play_delta_);\r
 114                                 if(frames_left < 1)\r
 115                                 {\r
 116                                         play();\r
 117                                         return receive(flags, format_desc);\r
 118                                 }\r
 119                         }\r
 120 \r
 121                         event_subject_  << monitor::event("state")      % u8(is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"))                                                       \r
 122                                                         << monitor::event("time")       % monitor::duration(frame_number_/format_desc.fps)\r
 123                                                                                                                 % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)\r
 124                                                         << monitor::event("frame")      % static_cast<int64_t>(frame_number_)\r
 125                                                                                                                 % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));\r
 126                                 \r
 127                         return frame;\r
 128                 }\r
 129                 catch(...)\r
 130                 {\r
 131                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 132                         stop();\r
 133                         return core::draw_frame::empty();\r
 134                 }\r
 135         }\r
 136         \r
 137         boost::property_tree::wptree info() const\r
 138         {\r
 139                 boost::property_tree::wptree info;\r
 140                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 141                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));\r
 142                 info.add(L"frame-number", frame_number_);\r
 143 \r
 144                 auto nb_frames = foreground_->nb_frames();\r
 145 \r
 146                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 147                 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
 148                 info.add_child(L"foreground.producer", foreground_->info());\r
 149                 info.add_child(L"background.producer", background_->info());\r
 150                 return info;\r
 151         }\r
 152 };\r
 153 \r
 154 layer::layer(int index) : impl_(new impl(index)){}\r
 155 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 156 layer& layer::operator=(layer&& other)\r
 157 {\r
 158         other.swap(*this);\r
 159         return *this;\r
 160 }\r
 161 void layer::swap(layer& other)\r
 162 {       \r
 163         impl_.swap(other.impl_);\r
 164 }\r
 165 void layer::load(spl::shared_ptr<frame_producer> frame_producer, const boost::optional<int32_t>& auto_play_delta){return impl_->load(std::move(frame_producer), auto_play_delta);}      \r
 166 void layer::play(){impl_->play();}\r
 167 void layer::pause(){impl_->pause();}\r
 168 void layer::stop(){impl_->stop();}\r
 169 spl::shared_ptr<draw_frame> layer::receive(frame_producer::flags flags, const video_format_desc& format_desc) {return impl_->receive(flags, format_desc);}\r
 170 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 171 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 172 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 173 void layer::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}\r
 174 void layer::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}\r
 175 }}