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         bool                                            is_paused_;\r
  22 \r
  23 public:\r
  24         implementation() \r
  25                 : foreground_(frame_producer::empty())\r
  26                 , background_(frame_producer::empty())\r
  27                 , last_frame_(draw_frame::empty())\r
  28                 , is_paused_(false){}\r
  29         \r
  30         void load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load)\r
  31         {                       \r
  32                 background_ = frame_producer;\r
  33                 CASPAR_LOG(info) << print() << " " << frame_producer->print() << " => background";\r
  34                 if(play_on_load)\r
  35                         play();                 \r
  36         }\r
  37 \r
  38         void preview(const safe_ptr<frame_producer>& frame_producer)\r
  39         {\r
  40                 stop();\r
  41                 load(frame_producer, false);            \r
  42                 try\r
  43                 {\r
  44                         last_frame_ = frame_producer->receive();\r
  45                 }\r
  46                 catch(...)\r
  47                 {\r
  48                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  49                         clear();\r
  50                 }\r
  51         }\r
  52         \r
  53         void play()\r
  54         {                       \r
  55                 if(is_paused_)                  \r
  56                         is_paused_ = false;\r
  57                 else\r
  58                 {\r
  59                         background_->set_leading_producer(foreground_);\r
  60                         foreground_ = background_;\r
  61                         background_ = frame_producer::empty();\r
  62                         CASPAR_LOG(info) << print() << L" background => foreground";\r
  63                 }\r
  64         }\r
  65 \r
  66         void pause()\r
  67         {\r
  68                 is_paused_ = true;\r
  69         }\r
  70 \r
  71         void stop()\r
  72         {\r
  73                 pause();\r
  74                 last_frame_ = draw_frame::empty();\r
  75                 foreground_ = frame_producer::empty();\r
  76                 CASPAR_LOG(warning) << print() << L" empty => foreground";\r
  77         }\r
  78 \r
  79         void clear()\r
  80         {\r
  81                 stop();\r
  82                 background_ = frame_producer::empty();\r
  83                 CASPAR_LOG(warning) << print() << L" empty => background";\r
  84         }\r
  85         \r
  86         safe_ptr<draw_frame> receive()\r
  87         {               \r
  88                 if(is_paused_)\r
  89                         return last_frame_;\r
  90 \r
  91                 try\r
  92                 {\r
  93                         last_frame_ = foreground_->receive(); \r
  94                         if(last_frame_ == draw_frame::eof())\r
  95                         {\r
  96                                 CASPAR_ASSERT(foreground_ != frame_producer::empty());\r
  97 \r
  98                                 auto following = foreground_->get_following_producer();\r
  99                                 following->set_leading_producer(foreground_);\r
 100                                 foreground_ = following;\r
 101 \r
 102                                 CASPAR_LOG(info) << print() << L" [EOF] " << foreground_->print() << " => foreground";\r
 103 \r
 104                                 last_frame_ = receive();\r
 105                         }\r
 106                 }\r
 107                 catch(...)\r
 108                 {\r
 109                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 110                         stop();\r
 111                 }\r
 112 \r
 113                 return last_frame_;\r
 114         }\r
 115 \r
 116         std::wstring print() const { return L"layer[]"; }\r
 117 };\r
 118 \r
 119 layer::layer() \r
 120 {\r
 121         impl_ = new implementation();\r
 122 }\r
 123 layer::layer(layer&& other) : impl_(std::move(other.impl_)){other.impl_ = nullptr;}\r
 124 layer::~layer()\r
 125 {\r
 126         delete impl_.fetch_and_store(nullptr);\r
 127 }\r
 128 layer& layer::operator=(layer&& other)\r
 129 {\r
 130         impl_ = std::move(other.impl_); \r
 131         other.impl_ = nullptr;\r
 132         return *this;\r
 133 }\r
 134 void layer::swap(layer& other)\r
 135 {\r
 136         impl_ = other.impl_.compare_and_swap(impl_, other.impl_);\r
 137 }\r
 138 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load){return impl_->load(frame_producer, play_on_load);}  \r
 139 void layer::preview(const safe_ptr<frame_producer>& frame_producer){return impl_->preview(frame_producer);}     \r
 140 void layer::play(){impl_->play();}\r
 141 void layer::pause(){impl_->pause();}\r
 142 void layer::stop(){impl_->stop();}\r
 143 void layer::clear(){impl_->clear();}\r
 144 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}\r
 145 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 146 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 147 }}