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 "../mixer/frame/draw_frame.h"\r
   6 #include "../mixer/image/image_mixer.h"\r
   7 #include "../mixer/audio/audio_mixer.h"\r
   8 #include "../producer/frame_producer.h"\r
   9 \r
  10 #include "../video_format.h"\r
  11 \r
  12 #include <common/utility/assert.h>\r
  13 \r
  14 namespace caspar { namespace core {\r
  15 \r
  16 struct layer::implementation : boost::noncopyable\r
  17 {                                       \r
  18         safe_ptr<frame_producer>        foreground_;\r
  19         safe_ptr<frame_producer>        background_;\r
  20         safe_ptr<draw_frame>            last_frame_;\r
  21         const int                                       index_;\r
  22         bool                                            is_paused_;\r
  23 \r
  24 public:\r
  25         implementation(int index) \r
  26                 : foreground_(frame_producer::empty())\r
  27                 , background_(frame_producer::empty())\r
  28                 , last_frame_(draw_frame::empty())\r
  29                 , index_(index) \r
  30                 , is_paused_(false){}\r
  31         \r
  32         void load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load)\r
  33         {                       \r
  34                 background_ = frame_producer;\r
  35                 CASPAR_LOG(info) << print() << " " << frame_producer->print() << " => background";\r
  36                 if(play_on_load)\r
  37                         play();                 \r
  38         }\r
  39 \r
  40         void preview(const safe_ptr<frame_producer>& frame_producer)\r
  41         {\r
  42                 stop();\r
  43                 load(frame_producer, false);            \r
  44                 try\r
  45                 {\r
  46                         last_frame_ = frame_producer->receive();\r
  47                 }\r
  48                 catch(...)\r
  49                 {\r
  50                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  51                         clear();\r
  52                 }\r
  53         }\r
  54         \r
  55         void play()\r
  56         {                       \r
  57                 if(is_paused_)                  \r
  58                         is_paused_ = false;\r
  59                 else\r
  60                 {\r
  61                         background_->set_leading_producer(foreground_);\r
  62                         foreground_ = background_;\r
  63                         background_ = frame_producer::empty();\r
  64                         CASPAR_LOG(info) << print() << L" background => foreground";\r
  65                 }\r
  66         }\r
  67 \r
  68         void pause()\r
  69         {\r
  70                 is_paused_ = true;\r
  71         }\r
  72 \r
  73         void stop()\r
  74         {\r
  75                 pause();\r
  76                 last_frame_ = draw_frame::empty();\r
  77                 foreground_ = frame_producer::empty();\r
  78                 CASPAR_LOG(warning) << print() << L" empty => foreground";\r
  79         }\r
  80 \r
  81         void clear()\r
  82         {\r
  83                 stop();\r
  84                 background_ = frame_producer::empty();\r
  85                 CASPAR_LOG(warning) << print() << L" empty => background";\r
  86         }\r
  87         \r
  88         safe_ptr<draw_frame> receive()\r
  89         {               \r
  90                 if(is_paused_)\r
  91                         return last_frame_;\r
  92 \r
  93                 try\r
  94                 {\r
  95                         last_frame_ = foreground_->receive(); \r
  96                         last_frame_->set_layer_index(index_);\r
  97                         if(last_frame_ == draw_frame::eof())\r
  98                         {\r
  99                                 CASPAR_ASSERT(foreground_ != frame_producer::empty());\r
 100 \r
 101                                 auto following = foreground_->get_following_producer();\r
 102                                 following->set_leading_producer(foreground_);\r
 103                                 foreground_ = following;\r
 104 \r
 105                                 CASPAR_LOG(info) << print() << L" [EOF] " << foreground_->print() << " => foreground";\r
 106 \r
 107                                 last_frame_ = receive();\r
 108                         }\r
 109                 }\r
 110                 catch(...)\r
 111                 {\r
 112                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 113                         stop();\r
 114                 }\r
 115 \r
 116                 return last_frame_;\r
 117         }\r
 118 \r
 119         std::wstring print() const { return L"layer[" + boost::lexical_cast<std::wstring>(index_) + L"]"; }\r
 120 };\r
 121 \r
 122 layer::layer(int index) : impl_(new implementation(index)){}\r
 123 layer::layer(layer&& other) : impl_(std::move(other.impl_)){other.impl_ = nullptr;}\r
 124 layer& layer::operator=(layer&& other)\r
 125 {\r
 126         impl_ = std::move(other.impl_); \r
 127         other.impl_ = nullptr;\r
 128         return *this;\r
 129 }\r
 130 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load){return impl_->load(frame_producer, play_on_load);}  \r
 131 void layer::preview(const safe_ptr<frame_producer>& frame_producer){return impl_->preview(frame_producer);}     \r
 132 void layer::play(){impl_->play();}\r
 133 void layer::pause(){impl_->pause();}\r
 134 void layer::stop(){impl_->stop();}\r
 135 void layer::clear(){impl_->clear();}\r
 136 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}\r
 137 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 138 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 139 }}