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 #include "frame/basic_frame.h"\r
  28 \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         bool                                            is_paused_;\r
  37         int                                                     auto_play_delta_;\r
  38         int64_t                                         frame_number_;\r
  39 public:\r
  40         implementation() \r
  41                 : foreground_(frame_producer::empty())\r
  42                 , background_(frame_producer::empty())\r
  43                 , is_paused_(false)\r
  44                 , auto_play_delta_(-1){}\r
  45         \r
  46         void pause(){is_paused_ = true;}\r
  47         void resume(){is_paused_ = false;}\r
  48 \r
  49         void load(const safe_ptr<frame_producer>& producer, bool preview, int auto_play_delta)\r
  50         {               \r
  51                 background_              = producer;\r
  52                 auto_play_delta_ = auto_play_delta;\r
  53 \r
  54                 if(preview) // Play the first frame and pause.\r
  55                 {                       \r
  56                         play();\r
  57                         receive();\r
  58                         pause();\r
  59                 }\r
  60 \r
  61                 if(auto_play_delta >= 0 && foreground_ == frame_producer::empty())\r
  62                         play();\r
  63         }\r
  64         \r
  65         void play()\r
  66         {                       \r
  67                 if(background_ != frame_producer::empty())\r
  68                 {\r
  69                         background_->set_leading_producer(foreground_);\r
  70                         foreground_ = background_;\r
  71                         frame_number_ = 0;\r
  72                         auto_play_delta_ = -1;\r
  73                         background_ = frame_producer::empty();\r
  74                 }\r
  75                 resume();\r
  76         }\r
  77         \r
  78         void stop()\r
  79         {\r
  80                 foreground_ = frame_producer::empty();\r
  81         }\r
  82                 \r
  83         safe_ptr<basic_frame> receive()\r
  84         {               \r
  85                 if(is_paused_)\r
  86                         return foreground_->last_frame();\r
  87                 \r
  88                 auto frame = receive_and_follow(foreground_);\r
  89                 if(frame == core::basic_frame::late())\r
  90                         return foreground_->last_frame();\r
  91                         \r
  92                 ++frame_number_;\r
  93 \r
  94                 if(auto_play_delta_ >= 0)\r
  95                 {\r
  96                         const auto frames_left = foreground_->nb_frames() - frame_number_ - auto_play_delta_;\r
  97 \r
  98                         if(frames_left <= 0 || frame == core::basic_frame::eof())\r
  99                         {\r
 100                                 CASPAR_VERIFY(auto_play_delta_ != 0 || frame == core::basic_frame::eof())\r
 101 \r
 102                                 CASPAR_LOG(info) << L"Automatically playing next clip with " << auto_play_delta_ << " frames offset.";\r
 103                                 \r
 104                                 play();\r
 105                                 frame = receive();\r
 106                         }\r
 107                 }\r
 108                                 \r
 109                 return frame;\r
 110         }\r
 111 };\r
 112 \r
 113 layer::layer() : impl_(new implementation()){}\r
 114 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 115 layer& layer::operator=(layer&& other)\r
 116 {\r
 117         impl_ = std::move(other.impl_);\r
 118         return *this;\r
 119 }\r
 120 layer::layer(const layer& other) : impl_(new implementation(*other.impl_)){}\r
 121 layer& layer::operator=(const layer& other)\r
 122 {\r
 123         layer temp(other);\r
 124         temp.swap(*this);\r
 125         return *this;\r
 126 }\r
 127 void layer::swap(layer& other)\r
 128 {       \r
 129         impl_.swap(other.impl_);\r
 130 }\r
 131 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
 132 void layer::play(){impl_->play();}\r
 133 void layer::pause(){impl_->pause();}\r
 134 void layer::stop(){impl_->stop();}\r
 135 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 136 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 137 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 138 }}