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

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\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 */\r
  20 \r
  21 #include "../stdafx.h"\r
  22 \r
  23 #include "layer.h"\r
  24 \r
  25 #include "frame_producer.h"\r
  26 #include "frame/basic_frame.h"\r
  27 \r
  28 #include <boost/property_tree/ptree.hpp>\r
  29 \r
  30 namespace caspar { namespace core {\r
  31         \r
  32 struct layer::implementation\r
  33 {                               \r
  34         safe_ptr<frame_producer>        foreground_;\r
  35         safe_ptr<frame_producer>        background_;\r
  36         int64_t                                         frame_number_;\r
  37         int                                                     auto_play_delta_;\r
  38         bool                                            is_paused_;\r
  39 \r
  40 public:\r
  41         implementation() \r
  42                 : foreground_(frame_producer::empty())\r
  43                 , background_(frame_producer::empty())\r
  44                 , frame_number_(0)\r
  45                 , auto_play_delta_(-1)\r
  46                 , is_paused_(false)\r
  47         {\r
  48         }\r
  49         \r
  50         void pause()\r
  51         {\r
  52                 is_paused_ = true;\r
  53         }\r
  54 \r
  55         void resume()\r
  56         {\r
  57                 is_paused_ = false;\r
  58         }\r
  59 \r
  60         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
  61         {               \r
  62                 background_              = producer;\r
  63                 auto_play_delta_ = auto_play_delta;\r
  64 \r
  65                 if(preview) // Play the first frame and pause.\r
  66                 {                       \r
  67                         play();\r
  68                         receive();\r
  69                         pause();\r
  70                 }\r
  71         }\r
  72         \r
  73         void play()\r
  74         {                       \r
  75                 if(background_ != frame_producer::empty())\r
  76                 {\r
  77                         background_->set_leading_producer(foreground_);\r
  78                         \r
  79                         foreground_                     = background_;\r
  80                         background_                     = frame_producer::empty();\r
  81                         frame_number_           = 0;\r
  82                         auto_play_delta_        = -1;   \r
  83                 }\r
  84 \r
  85                 is_paused_                      = false;\r
  86         }\r
  87         \r
  88         void stop()\r
  89         {\r
  90                 foreground_                     = frame_producer::empty();\r
  91                 background_                     = background_;\r
  92                 frame_number_           = 0;\r
  93                 auto_play_delta_        = -1;\r
  94 \r
  95                 is_paused_                      = true;\r
  96         }\r
  97                 \r
  98         safe_ptr<basic_frame> receive()\r
  99         {               \r
 100                 try\r
 101                 {\r
 102                         if(is_paused_)\r
 103                                 return disable_audio(foreground_->last_frame());\r
 104                 \r
 105                         auto frame = receive_and_follow(foreground_, frame_producer::NO_HINT);\r
 106                         if(frame == core::basic_frame::late())\r
 107                                 return foreground_->last_frame();\r
 108 \r
 109                         auto frames_left = foreground_->nb_frames() - (++frame_number_) - auto_play_delta_;\r
 110                         if(auto_play_delta_ > -1 && frames_left < 1)\r
 111                         {\r
 112                                 play();\r
 113                                 return receive();\r
 114                         }\r
 115                                 \r
 116                         return frame;\r
 117                 }\r
 118                 catch(...)\r
 119                 {\r
 120                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 121                         stop();\r
 122                         return core::basic_frame::empty();\r
 123                 }\r
 124         }\r
 125 \r
 126         boost::unique_future<std::wstring> call(bool foreground, const std::wstring& param)\r
 127         {\r
 128                 return (foreground ? foreground_ : background_)->call(param);\r
 129         }\r
 130 \r
 131         bool empty() const\r
 132         {\r
 133                 return background_ == core::frame_producer::empty() && foreground_ == core::frame_producer::empty();\r
 134         }\r
 135 \r
 136         boost::property_tree::wptree info() const\r
 137         {\r
 138                 boost::property_tree::wptree info;\r
 139                 info.add(L"status",             is_paused_ ? L"paused" : (foreground_ == frame_producer::empty() ? L"stopped" : L"playing"));\r
 140                 info.add(L"auto_delta", auto_play_delta_);\r
 141                 info.add(L"frame-number", frame_number_);\r
 142 \r
 143                 auto nb_frames = foreground_->nb_frames();\r
 144 \r
 145                 info.add(L"nb_frames",   nb_frames == std::numeric_limits<int64_t>::max() ? -1 : nb_frames);\r
 146                 info.add(L"frames-left", nb_frames == std::numeric_limits<int64_t>::max() ? -1 : (foreground_->nb_frames() - frame_number_ - auto_play_delta_));\r
 147                 info.add_child(L"foreground", foreground_->info());\r
 148                 info.add_child(L"background", background_->info());\r
 149                 return info;\r
 150         }\r
 151 };\r
 152 \r
 153 layer::layer() : impl_(new implementation()){}\r
 154 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 155 layer& layer::operator=(layer&& other)\r
 156 {\r
 157         impl_ = std::move(other.impl_);\r
 158         return *this;\r
 159 }\r
 160 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 161 layer& layer::operator=(const layer& other)\r
 162 {\r
 163         layer temp(other);\r
 164         temp.swap(*this);\r
 165         return *this;\r
 166 }\r
 167 void layer::swap(layer& other)\r
 168 {       \r
 169         impl_.swap(other.impl_);\r
 170 }\r
 171 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview, int auto_play_delta){return impl_->load(frame_producer, preview, auto_play_delta);}      \r
 172 void layer::play(){impl_->play();}\r
 173 void layer::pause(){impl_->pause();}\r
 174 void layer::stop(){impl_->stop();}\r
 175 bool layer::is_paused() const{return impl_->is_paused_;}\r
 176 int64_t layer::frame_number() const{return impl_->frame_number_;}\r
 177 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 178 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 179 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 180 bool layer::empty() const {return impl_->empty();}\r
 181 boost::unique_future<std::wstring> layer::call(bool foreground, const std::wstring& param){return impl_->call(foreground, param);}\r
 182 boost::property_tree::wptree layer::info() const{return impl_->info();}\r
 183 }}