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                 if(play_on_load)\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                         clear();\r
  49                 }\r
  50         }\r
  51         \r
  52         void play()\r
  53         {                       \r
  54                 if(is_paused_)                  \r
  55                         is_paused_ = false;\r
  56                 else\r
  57                 {\r
  58                         background_->set_leading_producer(foreground_);\r
  59                         foreground_ = background_;\r
  60                         background_ = frame_producer::empty();\r
  61                 }\r
  62         }\r
  63 \r
  64         void pause()\r
  65         {\r
  66                 is_paused_ = true;\r
  67         }\r
  68 \r
  69         void stop()\r
  70         {\r
  71                 pause();\r
  72                 last_frame_ = draw_frame::empty();\r
  73                 foreground_ = frame_producer::empty();\r
  74         }\r
  75 \r
  76         void clear()\r
  77         {\r
  78                 stop();\r
  79                 background_ = frame_producer::empty();\r
  80         }\r
  81         \r
  82         safe_ptr<draw_frame> receive()\r
  83         {               \r
  84                 if(is_paused_)\r
  85                         return last_frame_;\r
  86 \r
  87                 try\r
  88                 {\r
  89                         last_frame_ = foreground_->receive(); \r
  90                         if(last_frame_ == draw_frame::eof())\r
  91                         {\r
  92                                 CASPAR_ASSERT(foreground_ != frame_producer::empty());\r
  93 \r
  94                                 auto following = foreground_->get_following_producer();\r
  95                                 following->set_leading_producer(foreground_);\r
  96                                 foreground_ = following;\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 \r
 111 layer::layer() \r
 112 {\r
 113         impl_ = new implementation();\r
 114 }\r
 115 layer::layer(layer&& other) \r
 116 {\r
 117         impl_ = other.impl_.compare_and_swap(nullptr, other.impl_);\r
 118 }\r
 119 layer::~layer()\r
 120 {\r
 121         delete impl_.fetch_and_store(nullptr);\r
 122 }\r
 123 layer& layer::operator=(layer&& other)\r
 124 {\r
 125         impl_ = other.impl_.compare_and_swap(nullptr, other.impl_);\r
 126         return *this;\r
 127 }\r
 128 void layer::swap(layer& other)\r
 129 {\r
 130         impl_ = other.impl_.compare_and_swap(impl_, other.impl_);\r
 131 }\r
 132 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load){return impl_->load(frame_producer, play_on_load);}  \r
 133 void layer::preview(const safe_ptr<frame_producer>& frame_producer){return impl_->preview(frame_producer);}     \r
 134 void layer::play(){impl_->play();}\r
 135 void layer::pause(){impl_->pause();}\r
 136 void layer::stop(){impl_->stop();}\r
 137 void layer::clear(){impl_->clear();}\r
 138 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}\r
 139 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 140 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 141 }}