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 #include "frame_producer.h"\r
  25 \r
  26 #include "../producer/frame/basic_frame.h"\r
  27 #include "../producer/frame/audio_transform.h"\r
  28 \r
  29 namespace caspar { namespace core {\r
  30         \r
  31 struct layer::implementation\r
  32 {                               \r
  33         safe_ptr<frame_producer>        foreground_;\r
  34         safe_ptr<frame_producer>        background_;\r
  35         safe_ptr<basic_frame>           last_frame_;\r
  36         bool                                            is_paused_;\r
  37 public:\r
  38         implementation() \r
  39                 : foreground_(frame_producer::empty())\r
  40                 , background_(frame_producer::empty())\r
  41                 , last_frame_(basic_frame::empty())\r
  42                 , is_paused_(false){}\r
  43         \r
  44         void pause(){is_paused_ = true;}\r
  45         void resume(){is_paused_ = false;}\r
  46 \r
  47         void load(const safe_ptr<frame_producer>& producer, bool preview)\r
  48         {               \r
  49                 background_ = producer;\r
  50 \r
  51                 if(preview) \r
  52                 {\r
  53                         // Play the first frame and pause.\r
  54                         play();\r
  55                         receive();\r
  56                         pause();\r
  57                 }\r
  58         }\r
  59         \r
  60         void play()\r
  61         {                       \r
  62                 if(background_ != frame_producer::empty())\r
  63                 {\r
  64                         background_->set_leading_producer(foreground_);\r
  65                         foreground_ = background_;\r
  66                         background_ = frame_producer::empty();\r
  67                 }\r
  68                 resume();\r
  69         }\r
  70         \r
  71         void stop()\r
  72         {\r
  73                 pause();\r
  74                 last_frame_ = basic_frame::empty();\r
  75                 foreground_ = frame_producer::empty();\r
  76         }\r
  77                 \r
  78         safe_ptr<basic_frame> receive()\r
  79         {               \r
  80                 if(is_paused_)\r
  81                         return last_frame_;\r
  82 \r
  83                 auto next_frame = receive_and_follow(foreground_);\r
  84                 if(next_frame == core::basic_frame::late())\r
  85                         return last_frame_;\r
  86                                 \r
  87                 last_frame_ = basic_frame(next_frame);\r
  88                 last_frame_->get_audio_transform().set_has_audio(false);\r
  89 \r
  90                 return next_frame;\r
  91         }\r
  92 };\r
  93 \r
  94 layer::layer() : impl_(new implementation()){}\r
  95 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
  96 layer& layer::operator=(layer&& other)\r
  97 {\r
  98         impl_ = std::move(other.impl_);\r
  99         return *this;\r
 100 }\r
 101 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 102 layer& layer::operator=(const layer& other)\r
 103 {\r
 104         layer temp(other);\r
 105         temp.swap(*this);\r
 106         return *this;\r
 107 }\r
 108 void layer::swap(layer& other)\r
 109 {       \r
 110         impl_.swap(other.impl_);\r
 111 }\r
 112 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool preview){return impl_->load(frame_producer, preview);}    \r
 113 void layer::play(){impl_->play();}\r
 114 void layer::pause(){impl_->pause();}\r
 115 void layer::stop(){impl_->stop();}\r
 116 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 117 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 118 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 119 }}