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         spl::shared_ptr<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         bool                                                            is_paused_;
  44
  45 public:
  46         impl(int index)
  47                 : monitor_subject_(spl::make_shared<monitor::subject>(
  48                                 "/layer/" + boost::lexical_cast<std::string>(index)))
  49 //              , foreground_event_subject_("")
  50 //              , background_event_subject_("background")
  51                 , foreground_(frame_producer::empty())
  52                 , background_(frame_producer::empty())
  53                 , is_paused_(false)
  54         {
  55 //              foreground_event_subject_.subscribe(event_subject_);
  56 //              background_event_subject_.subscribe(event_subject_);
  57         }
  58
  59         void set_foreground(spl::shared_ptr<frame_producer> producer)
  60         {
  61                 foreground_->monitor_output().detach_parent();
  62                 foreground_ = std::move(producer);
  63                 foreground_->monitor_output().attach_parent(monitor_subject_);
  64         }
  65
  66         void pause()
  67         {
  68                 foreground_->paused(true);
  69                 is_paused_ = true;
  70         }
  71
  72         void load(spl::shared_ptr<frame_producer> producer, bool preview, const boost::optional<int32_t>& auto_play_delta)
  73         {
  74 //              background_->unsubscribe(background_event_subject_);
  75                 background_ = std::move(producer);
  76 //              background_->subscribe(background_event_subject_);
  77
  78                 auto_play_delta_ = auto_play_delta;
  79
  80                 if(preview)
  81                 {
  82                         play();
  83                         foreground_->paused(true);
  84                         is_paused_ = true;
  85                 }
  86
  87                 if(auto_play_delta_ && foreground_ == frame_producer::empty())
  88                         play();
  89         }
  90
  91         void play()
  92         {
  93                 if(background_ != frame_producer::empty())
  94                 {
  95                         background_->leading_producer(foreground_);
  96
  97                         set_foreground(background_);
  98                         background_ = std::move(frame_producer::empty());
  99
 100                         auto_play_delta_.reset();
 101                 }
 102
 103                 foreground_->paused(false);
 104                 is_paused_ = false;
 105         }
 106
 107         void stop()
 108         {
 109                 set_foreground(frame_producer::empty());
 110
 111                 auto_play_delta_.reset();
 112         }
 113
 114         draw_frame receive(const video_format_desc& format_desc)
 115         {
 116                 try
 117                 {
 118                         *monitor_subject_ << monitor::message("/paused") % is_paused_;
 119
 120                         auto frame = foreground_->receive();
 121
 122                         if(frame == core::draw_frame::late())
 123                                 return foreground_->last_frame();
 124
 125                         if(auto_play_delta_)
 126                         {
 127                                 auto frames_left = static_cast<int64_t>(foreground_->nb_frames()) - foreground_->frame_number() - static_cast<int64_t>(*auto_play_delta_);
 128                                 if(frames_left < 1)
 129                                 {
 130                                         play();
 131                                         return receive(format_desc);
 132                                 }
 133                         }
 134
 135                         //event_subject_        << monitor::event("time")       % monitor::duration(foreground_->frame_number()/format_desc.fps)
 136                         //                                                                                      % monitor::duration(static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)/format_desc.fps)
 137                         //                              << monitor::event("frame")      % static_cast<int64_t>(foreground_->frame_number())
 138                         //                                                                                      % static_cast<int64_t>((static_cast<int64_t>(foreground_->nb_frames()) - static_cast<int64_t>(auto_play_delta_ ? *auto_play_delta_ : 0)));
 139
 140                         //foreground_event_subject_ << monitor::event("type") % foreground_->name();
 141                         //background_event_subject_ << monitor::event("type") % background_->name();
 142
 143                         return frame;
 144                 }
 145                 catch(...)
 146                 {
 147                         CASPAR_LOG_CURRENT_EXCEPTION();
 148                         stop();
 149                         return core::draw_frame::empty();
 150                 }
 151         }
 152
 153         boost::property_tree::wptree info() const
 154         {
 155                 boost::property_tree::wptree info;
 156                 info.add(L"auto_delta", (auto_play_delta_ ? boost::lexical_cast<std::wstring>(*auto_play_delta_) : L"null"));
 157                 info.add(L"frame-number", foreground_->frame_number());
 158
 159                 auto nb_frames = foreground_->nb_frames();
 160
 161                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);
 162                 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)));
 163                 info.add_child(L"producer", foreground_->info());
 164                 info.add_child(L"background.producer", background_->info());
 165                 return info;
 166         }
 167
 168         void on_interaction(const interaction_event::ptr& event)
 169         {
 170                 foreground_->on_interaction(event);
 171         }
 172
 173         bool collides(double x, double y) const
 174         {
 175                 return foreground_->collides(x, y);
 176         }
 177 };
 178
 179 layer::layer(int index) : impl_(new impl(index)){}
 180 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}
 181 layer& layer::operator=(layer&& other)
 182 {
 183         other.swap(*this);
 184         return *this;
 185 }
 186 void layer::swap(layer& other)
 187 {
 188         impl_.swap(other.impl_);
 189 }
 190 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);}
 191 void layer::play(){impl_->play();}
 192 void layer::pause(){impl_->pause();}
 193 void layer::stop(){impl_->stop();}
 194 draw_frame layer::receive(const video_format_desc& format_desc) {return impl_->receive(format_desc);}
 195 spl::shared_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}
 196 spl::shared_ptr<frame_producer> layer::background() const { return impl_->background_;}
 197 boost::property_tree::wptree layer::info() const{return impl_->info();}
 198 monitor::subject& layer::monitor_output() {return *impl_->monitor_subject_;}
 199 void layer::on_interaction(const interaction_event::ptr& event) { impl_->on_interaction(event); }
 200 bool layer::collides(double x, double y) const { return impl_->collides(x, y); }
 201 }}