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 "../video_format.h"\r
   9 \r
  10 namespace caspar { namespace core {\r
  11 \r
  12 struct layer::implementation : boost::noncopyable\r
  13 {                                       \r
  14         safe_ptr<frame_producer>        foreground_;\r
  15         safe_ptr<frame_producer>        background_;\r
  16         safe_ptr<draw_frame>            last_frame_;\r
  17         const int                                       index_;\r
  18         bool                                            is_paused_;\r
  19 \r
  20 public:\r
  21         implementation(int index) \r
  22                 : foreground_(frame_producer::empty())\r
  23                 , background_(frame_producer::empty())\r
  24                 , last_frame_(draw_frame::empty())\r
  25                 , index_(index) \r
  26                 , is_paused_(false){}\r
  27         \r
  28         void load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load)\r
  29         {                       \r
  30                 background_ = frame_producer;\r
  31                 CASPAR_LOG(info) << print() << " " << frame_producer->print() << " => background";\r
  32                 if(play_on_load)\r
  33                         play();                 \r
  34         }\r
  35 \r
  36         void preview(const safe_ptr<frame_producer>& frame_producer)\r
  37         {\r
  38                 stop();\r
  39                 load(frame_producer, false);            \r
  40                 try\r
  41                 {\r
  42                         last_frame_ = frame_producer->receive();\r
  43                 }\r
  44                 catch(...)\r
  45                 {\r
  46                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  47                         clear();\r
  48                 }\r
  49         }\r
  50         \r
  51         void play()\r
  52         {                       \r
  53                 background_->set_leading_producer(foreground_);\r
  54                 foreground_ = background_;\r
  55                 background_ = frame_producer::empty();\r
  56                 is_paused_ = false;\r
  57                 CASPAR_LOG(info) << print() << L" background => foreground";\r
  58         }\r
  59 \r
  60         void pause()\r
  61         {\r
  62                 is_paused_ = true;\r
  63         }\r
  64 \r
  65         void stop()\r
  66         {\r
  67                 pause();\r
  68                 last_frame_ = draw_frame::empty();\r
  69                 foreground_ = frame_producer::empty();\r
  70                 CASPAR_LOG(warning) << print() << L" empty => foreground";\r
  71         }\r
  72 \r
  73         void clear()\r
  74         {\r
  75                 stop();\r
  76                 background_ = frame_producer::empty();\r
  77                 CASPAR_LOG(warning) << print() << L" empty => background";\r
  78         }\r
  79         \r
  80         safe_ptr<draw_frame> receive()\r
  81         {               \r
  82                 if(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                                 assert(foreground_ != frame_producer::empty());\r
  91 \r
  92                                 auto following = foreground_->get_following_producer();\r
  93                                 following->set_leading_producer(foreground_);\r
  94                                 foreground_ = following;\r
  95 \r
  96                                 CASPAR_LOG(info) << print() << L" [EOF] " << foreground_->print() << " => foreground";\r
  97 \r
  98                                 last_frame_ = receive();\r
  99                         }\r
 100                 }\r
 101                 catch(...)\r
 102                 {\r
 103                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 104                         stop();\r
 105                 }\r
 106 \r
 107                 return last_frame_;\r
 108         }\r
 109 \r
 110         std::wstring print() const { return L"layer[" + boost::lexical_cast<std::wstring>(index_) + L"]"; }\r
 111 };\r
 112 \r
 113 layer::layer(int index) : impl_(new implementation(index)){}\r
 114 layer::layer(layer&& other) : impl_(std::move(other.impl_)){other.impl_ = nullptr;}\r
 115 layer& layer::operator=(layer&& other)\r
 116 {\r
 117         impl_ = std::move(other.impl_); \r
 118         other.impl_ = nullptr;\r
 119         return *this;\r
 120 }\r
 121 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load){return impl_->load(frame_producer, play_on_load);}  \r
 122 void layer::preview(const safe_ptr<frame_producer>& frame_producer){return impl_->preview(frame_producer);}     \r
 123 void layer::play(){impl_->play();}\r
 124 void layer::pause(){impl_->pause();}\r
 125 void layer::stop(){impl_->stop();}\r
 126 void layer::clear(){impl_->clear();}\r
 127 bool layer::empty() const { return impl_->foreground_ == frame_producer::empty() && impl_->background_ == frame_producer::empty();}\r
 128 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}\r
 129 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 130 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 131 }}