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

   1 #include "../stdafx.h"\r
   2 \r
   3 #include "layer.h"\r
   4 \r
   5 #include "../processor/draw_frame.h"\r
   6 #include "../producer/frame_producer.h"\r
   7 \r
   8 #include "../format/video_format.h"\r
   9 \r
  10 namespace caspar { namespace core {\r
  11 \r
  12 struct layer::implementation : boost::noncopyable\r
  13 {       \r
  14         std::wstring print() const { return L"layer[" + boost::lexical_cast<std::wstring>(index_) + L"]"; }\r
  15                                 \r
  16         tbb::atomic<bool>                       is_paused_;\r
  17         safe_ptr<draw_frame>            last_frame_;\r
  18         safe_ptr<frame_producer>        foreground_;\r
  19         safe_ptr<frame_producer>        background_;\r
  20         const int                                       index_;\r
  21 \r
  22 public:\r
  23         implementation(int index) \r
  24                 : foreground_(frame_producer::empty())\r
  25                 , background_(frame_producer::empty())\r
  26                 , last_frame_(draw_frame::empty())\r
  27                 , index_(index) {}\r
  28         \r
  29         void load(const safe_ptr<frame_producer>& frame_producer, bool autoplay)\r
  30         {                       \r
  31                 background_ = frame_producer;\r
  32                 CASPAR_LOG(info) << print() << " " << frame_producer->print() << " => background";\r
  33                 if(autoplay)\r
  34                         play();                 \r
  35         }\r
  36 \r
  37         void preview(const safe_ptr<frame_producer>& frame_producer)\r
  38         {\r
  39                 stop();\r
  40                 load(frame_producer, false);                    \r
  41                 try\r
  42                 {\r
  43                         last_frame_ = frame_producer->receive();\r
  44                 }\r
  45                 catch(...)\r
  46                 {\r
  47                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  48                         CASPAR_LOG(warning) << print() << L" empty => background";\r
  49                         background_ = frame_producer::empty();\r
  50                 }\r
  51         }\r
  52         \r
  53         void play()\r
  54         {                       \r
  55                 background_->set_leading_producer(foreground_);\r
  56                 foreground_ = background_;\r
  57                 background_ = frame_producer::empty();\r
  58                 is_paused_ = false;\r
  59                 CASPAR_LOG(info) << print() << L" background => foreground";\r
  60         }\r
  61 \r
  62         void pause()\r
  63         {\r
  64                 is_paused_ = true;\r
  65         }\r
  66 \r
  67         void stop()\r
  68         {\r
  69                 foreground_ = frame_producer::empty();\r
  70                 last_frame_ = draw_frame::empty();\r
  71         }\r
  72 \r
  73         void clear()\r
  74         {\r
  75                 foreground_ = frame_producer::empty();\r
  76                 background_ = frame_producer::empty();\r
  77                 last_frame_ = draw_frame::empty();\r
  78         }\r
  79         \r
  80         safe_ptr<draw_frame> receive()\r
  81         {               \r
  82                 if(foreground_ == frame_producer::empty() || is_paused_)\r
  83                         return last_frame_;\r
  84 \r
  85                 try\r
  86                 {\r
  87                         last_frame_ = foreground_->receive(); \r
  88                         if(last_frame_ == draw_frame::eof())\r
  89                         {\r
  90                                 auto following = foreground_->get_following_producer();\r
  91                                 following->set_leading_producer(foreground_);\r
  92                                 foreground_ = following;\r
  93                                 if(foreground_ != frame_producer::empty())\r
  94                                         CASPAR_LOG(info) << print() << L" [EOF] " << foreground_->print() << " => foreground";\r
  95                                 else\r
  96                                         CASPAR_LOG(info) << print() << L" [EOF] empty => foreground";\r
  97                                 last_frame_ = receive();\r
  98                         }\r
  99                 }\r
 100                 catch(...)\r
 101                 {\r
 102                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 103                         CASPAR_LOG(warning) << print() << L" empty => foreground";\r
 104                         foreground_ = frame_producer::empty();\r
 105                         last_frame_ = draw_frame::empty();\r
 106                 }\r
 107 \r
 108                 return last_frame_;\r
 109         }\r
 110 };\r
 111 \r
 112 layer::layer(int index) : impl_(new implementation(index)){}\r
 113 layer::layer(layer&& other) : impl_(std::move(other.impl_)){other.impl_ = nullptr;}\r
 114 layer& layer::operator=(layer&& other)\r
 115 {\r
 116         impl_ = std::move(other.impl_); \r
 117         other.impl_ = nullptr;\r
 118         return *this;\r
 119 }\r
 120 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool autoplay){return impl_->load(frame_producer, autoplay);}  \r
 121 void layer::preview(const safe_ptr<frame_producer>& frame_producer){return impl_->preview(frame_producer);}     \r
 122 void layer::play(){impl_->play();}\r
 123 void layer::pause(){impl_->pause();}\r
 124 void layer::stop(){impl_->stop();}\r
 125 void layer::clear(){impl_->clear();}\r
 126 bool layer::empty() const { return impl_->foreground_ == frame_producer::empty() && impl_->background_ == frame_producer::empty();}\r
 127 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}\r
 128 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 129 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 130 }}