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