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 \r
  27 namespace caspar { namespace core {\r
  28         \r
  29 struct layer::implementation\r
  30 {                               \r
  31         safe_ptr<frame_producer>        foreground_;\r
  32         safe_ptr<frame_producer>        background_;\r
  33         bool                                            is_paused_;\r
  34 public:\r
  35         implementation() \r
  36                 : foreground_(frame_producer::empty())\r
  37                 , background_(frame_producer::empty())\r
  38                 , is_paused_(false){}\r
  39         \r
  40         void pause(){is_paused_ = true;}\r
  41         void resume(){is_paused_ = false;}\r
  42 \r
  43         void load(const safe_ptr<frame_producer>& producer, bool preview)\r
  44         {               \r
  45                 background_ = producer;\r
  46 \r
  47                 if(preview) // Play the first frame and pause.\r
  48                 {                       \r
  49                         play();\r
  50                         receive();\r
  51                         pause();\r
  52                 }\r
  53         }\r
  54         \r
  55         void play()\r
  56         {                       \r
  57                 if(background_ != frame_producer::empty())\r
  58                 {\r
  59                         background_->set_leading_producer(foreground_);\r
  60                         foreground_ = background_;\r
  61                         background_ = frame_producer::empty();\r
  62                 }\r
  63                 resume();\r
  64         }\r
  65         \r
  66         void stop()\r
  67         {\r
  68                 foreground_ = frame_producer::empty();\r
  69         }\r
  70                 \r
  71         safe_ptr<basic_frame> receive()\r
  72         {               \r
  73                 if(is_paused_)\r
  74                         return foreground_->last_frame();\r
  75                 \r
  76                 return receive_and_follow_w_last(foreground_);\r
  77         }\r
  78 };\r
  79 \r
  80 layer::layer() : impl_(new implementation()){}\r
  81 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
  82 layer& layer::operator=(layer&& other)\r
  83 {\r
  84         impl_ = std::move(other.impl_);\r
  85         return *this;\r
  86 }\r
  87 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
  88 layer& layer::operator=(const layer& other)\r
  89 {\r
  90         layer temp(other);\r
  91         temp.swap(*this);\r
  92         return *this;\r
  93 }\r
  94 void layer::swap(layer& other)\r
  95 {       \r
  96         impl_.swap(other.impl_);\r
  97 }\r
  98 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview){return impl_->load(frame_producer, preview);}    \r
  99 void layer::play(){impl_->play();}\r
 100 void layer::pause(){impl_->pause();}\r
 101 void layer::stop(){impl_->stop();}\r
 102 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 103 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 104 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 105 }}