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

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../stdafx.h"
  23
  24 #include "layer.h"
  25
  26 #include "frame_producer.h"
  27
  28 #include "../video_format.h"
  29 #include "../frame/draw_frame.h"
  30 #include "../frame/frame_transform.h"
  31
  32 #include <boost/optional.hpp>
  33 #include <boost/thread/future.hpp>
  34
  35 namespace caspar { namespace core {
  36
  37 struct layer::impl
  38 {
  39         monitor::basic_subject                          event_subject_;
  40         monitor::basic_subject                          foreground_event_subject_;
  41         monitor::basic_subject                          background_event_subject_;
  42         spl::shared_ptr<frame_producer>         foreground_;
  43         spl::shared_ptr<frame_producer>         background_;
  44         boost::optional<int32_t>                        auto_play_delta_;
  45
  46 public:
  47         impl(int index)
  48                 : event_subject_(monitor::path("layer") % index)
  49                 , foreground_event_subject_("")
  50                 , background_event_subject_("background")
  51                 , foreground_(frame_producer::empty())
  52                 , background_(frame_producer::empty())
  53         {
  54                 foreground_event_subject_.subscribe(event_subject_);
  55                 background_event_subject_.subscribe(event_subject_);
  56         }
  57
  58         void pause()
  59         {
  60                 foreground_->paused(true);
  61         }
  62
  63         void load(spl::shared_ptr<frame_producer> producer, bool preview, const boost::optional<int32_t>& auto_play_delta)
  64         {
  65                 background_->unsubscribe(background_event_subject_);
  66                 background_ = std::move(producer);
  67                 background_->subscribe(background_event_subject_);
  68
  69                 auto_play_delta_ = auto_play_delta;
  70
  71                 if(preview)
  72                 {
  73                         play();
  74                         foreground_->paused(true);
  75                 }
  76
  77                 if(auto_play_delta_ && foreground_ == frame_producer::empty())
  78                         play();
  79         }
  80
  81         void play()
  82         {
  83                 if(background_ != frame_producer::empty())
  84                 {
  85                         background_->leading_producer(foreground_);
  86
  87                         background_->unsubscribe(background_event_subject_);
  88                         foreground_->unsubscribe(foreground_event_subject_);
  89
  90                         foreground_ = std::move(background_);
  91                         background_ = std::move(frame_producer::empty());
  92
  93                         foreground_->subscribe(foreground_event_subject_);
  94
  95                         auto_play_delta_.reset();
  96                 }
  97
  98                 foreground_->paused(false);
  99         }
 100
 101         void stop()
 102         {
 103                 foreground_->unsubscribe(foreground_event_subject_);
 104
 105                 foreground_ = std::move(frame_producer::empty());
 106
 107                 auto_play_delta_.reset();
 108         }
 109
 110         draw_frame receive(const video_format_desc& format_desc)
 111         {
 112                 try
 113                 {
 114                         auto frame = foreground_->receive();
 115
 116                         if(frame == core::draw_frame::late())
 117                                 return foreground_->last_frame();
 118
 119                         if(auto_play_delta_)
 120                         {
 121                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - foreground_->frame_number() - static_cast<int64_t>(*auto_play_delta_);
 122                                 if(frames_left < 1)
 123                                 {
 124                                         play();
 125                                         return receive(format_desc);
 126                                 }
 127                         }
 128
 129                         event_subject_  << monitor::event("time")       % monitor::duration(foreground_->frame_number()/format_desc.fps)
 130                                                                                                                 % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)
 131                                                         << monitor::event("frame")      % static_cast<int64_t>(foreground_->frame_number())
 132                                                                                                                 % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));
 133
 134                         foreground_event_subject_ << monitor::event("type") % foreground_->name();
 135                         background_event_subject_ << monitor::event("type") % background_->name();
 136
 137                         return frame;
 138                 }
 139                 catch(...)
 140                 {
 141                         CASPAR_LOG_CURRENT_EXCEPTION();
 142                         stop();
 143                         return core::draw_frame::empty();
 144                 }
 145         }
 146
 147         boost::property_tree::wptree info() const
 148         {
 149                 boost::property_tree::wptree info;
 150                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));
 151                 info.add(L"frame-number", foreground_->frame_number());
 152
 153                 auto nb_frames = foreground_->nb_frames();
 154
 155                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);
 156                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - foreground_->frame_number() - (auto_play_delta_ ? *auto_play_delta_ : 0)));
 157                 info.add_child(L"producer", foreground_->info());
 158                 info.add_child(L"background.producer", background_->info());
 159                 return info;
 160         }
 161 };
 162
 163 layer::layer(int index) : impl_(new impl(index)){}
 164 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}
 165 layer& layer::operator=(layer&& other)
 166 {
 167         other.swap(*this);
 168         return *this;
 169 }
 170 void layer::swap(layer& other)
 171 {
 172         impl_.swap(other.impl_);
 173 }
 174 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);}
 175 void layer::play(){impl_->play();}
 176 void layer::pause(){impl_->pause();}
 177 void layer::stop(){impl_->stop();}
 178 draw_frame layer::receive(const video_format_desc& format_desc) {return impl_->receive(format_desc);}
 179 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}
 180 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}
 181 boost::property_tree::wptree layer::info() const{return impl_->info();}
 182 void layer::subscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.subscribe(o);}
 183 void layer::unsubscribe(const monitor::observable::observer_ptr& o) {impl_->event_subject_.unsubscribe(o);}
 184 }}