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::subject                                        monitor_subject_;
  40         spl::shared_ptr<frame_producer>         foreground_;
  41         spl::shared_ptr<frame_producer>         background_;
  42         boost::optional<int32_t>                        auto_play_delta_;
  43
  44 public:
  45         impl(int index)
  46                 : monitor_subject_("/layer/" + boost::lexical_cast<std::string>(index))
  47 //              , foreground_event_subject_("")
  48 //              , background_event_subject_("background")
  49                 , foreground_(frame_producer::empty())
  50                 , background_(frame_producer::empty())
  51         {
  52 //              foreground_event_subject_.subscribe(event_subject_);
  53 //              background_event_subject_.subscribe(event_subject_);
  54         }
  55
  56         void set_foreground(spl::shared_ptr<frame_producer> producer)
  57         {
  58                 foreground_->monitor_output().unlink_target(&monitor_subject_);
  59                 foreground_ = std::move(producer);
  60                 foreground_->monitor_output().link_target(&monitor_subject_);
  61         }
  62
  63         void pause()
  64         {
  65                 foreground_->paused(true);
  66         }
  67
  68         void load(spl::shared_ptr<frame_producer> producer, bool preview, const boost::optional<int32_t>& auto_play_delta)
  69         {
  70 //              background_->unsubscribe(background_event_subject_);
  71                 background_ = std::move(producer);
  72 //              background_->subscribe(background_event_subject_);
  73
  74                 auto_play_delta_ = auto_play_delta;
  75
  76                 if(preview)
  77                 {
  78                         play();
  79                         foreground_->paused(true);
  80                 }
  81
  82                 if(auto_play_delta_ && foreground_ == frame_producer::empty())
  83                         play();
  84         }
  85
  86         void play()
  87         {
  88                 if(background_ != frame_producer::empty())
  89                 {
  90                         background_->leading_producer(foreground_);
  91
  92                         set_foreground(background_);
  93                         background_ = std::move(frame_producer::empty());
  94
  95                         auto_play_delta_.reset();
  96                 }
  97
  98                 foreground_->paused(false);
  99         }
 100
 101         void stop()
 102         {
 103                 set_foreground(frame_producer::empty());
 104
 105                 auto_play_delta_.reset();
 106         }
 107
 108         draw_frame receive(const video_format_desc& format_desc)
 109         {
 110                 try
 111                 {
 112                         auto frame = foreground_->receive();
 113
 114                         if(frame == core::draw_frame::late())
 115                                 return foreground_->last_frame();
 116
 117                         if(auto_play_delta_)
 118                         {
 119                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - foreground_->frame_number() - static_cast<int64_t>(*auto_play_delta_);
 120                                 if(frames_left < 1)
 121                                 {
 122                                         play();
 123                                         return receive(format_desc);
 124                                 }
 125                         }
 126
 127                         //event_subject_        << monitor::event("time")       % monitor::duration(foreground_->frame_number()/format_desc.fps)
 128                         //                                                                                      % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)
 129                         //                              << monitor::event("frame")      % static_cast<int64_t>(foreground_->frame_number())
 130                         //                                                                                      % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));
 131
 132                         //foreground_event_subject_ << monitor::event("type") % foreground_->name();
 133                         //background_event_subject_ << monitor::event("type") % background_->name();
 134
 135                         return frame;
 136                 }
 137                 catch(...)
 138                 {
 139                         CASPAR_LOG_CURRENT_EXCEPTION();
 140                         stop();
 141                         return core::draw_frame::empty();
 142                 }
 143         }
 144
 145         boost::property_tree::wptree info() const
 146         {
 147                 boost::property_tree::wptree info;
 148                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));
 149                 info.add(L"frame-number", foreground_->frame_number());
 150
 151                 auto nb_frames = foreground_->nb_frames();
 152
 153                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);
 154                 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)));
 155                 info.add_child(L"producer", foreground_->info());
 156                 info.add_child(L"background.producer", background_->info());
 157                 return info;
 158         }
 159
 160         void on_interaction(const interaction_event::ptr& event)
 161         {
 162                 foreground_->on_interaction(event);
 163         }
 164
 165         bool collides(double x, double y) const
 166         {
 167                 return foreground_->collides(x, y);
 168         }
 169 };
 170
 171 layer::layer(int index) : impl_(new impl(index)){}
 172 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}
 173 layer& layer::operator=(layer&& other)
 174 {
 175         other.swap(*this);
 176         return *this;
 177 }
 178 void layer::swap(layer& other)
 179 {
 180         impl_.swap(other.impl_);
 181 }
 182 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);}
 183 void layer::play(){impl_->play();}
 184 void layer::pause(){impl_->pause();}
 185 void layer::stop(){impl_->stop();}
 186 draw_frame layer::receive(const video_format_desc& format_desc) {return impl_->receive(format_desc);}
 187 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}
 188 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}
 189 boost::property_tree::wptree layer::info() const{return impl_->info();}
 190 monitor::source& layer::monitor_output() {return impl_->monitor_subject_;}
 191 void layer::on_interaction(const interaction_event::ptr& event) { impl_->on_interaction(event); }
 192 bool layer::collides(double x, double y) const { return impl_->collides(x, y); }
 193 }}