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 "../producer/frame_producer.h"\r
   6 \r
   7 #include "../format/video_format.h"\r
   8 \r
   9 namespace caspar { namespace core {\r
  10 \r
  11 struct layer::implementation\r
  12 {               \r
  13         implementation() : foreground_(nullptr), background_(nullptr), last_frame_(nullptr) {}\r
  14         \r
  15         void load(const frame_producer_ptr& frame_producer, load_option::type option)\r
  16         {\r
  17                 if(frame_producer == nullptr) \r
  18                         BOOST_THROW_EXCEPTION(null_argument() << arg_name_info("frame_producer"));\r
  19                         \r
  20                 background_ = frame_producer;\r
  21                 if(option == load_option::preview)              \r
  22                 {\r
  23                         foreground_ = nullptr;  \r
  24                         last_frame_ = frame_producer->render_frame();\r
  25                         if(last_frame_ != nullptr)\r
  26                                 last_frame_->get_audio_data().clear(); // No audio\r
  27                 }\r
  28                 else if(option == load_option::auto_play)\r
  29                         play();                 \r
  30         }\r
  31         \r
  32         void play()\r
  33         {                       \r
  34                 if(background_ != nullptr)\r
  35                 {\r
  36                         background_->set_leading_producer(foreground_);\r
  37                         foreground_ = std::move(background_);\r
  38                 }\r
  39 \r
  40                 is_paused_ = false;\r
  41         }\r
  42 \r
  43         void pause()\r
  44         {\r
  45                 is_paused_ = true;\r
  46         }\r
  47 \r
  48         void stop()\r
  49         {\r
  50                 foreground_ = nullptr;\r
  51                 last_frame_ = nullptr;\r
  52         }\r
  53 \r
  54         void clear()\r
  55         {\r
  56                 foreground_ = nullptr;\r
  57                 background_ = nullptr;\r
  58                 last_frame_ = nullptr;\r
  59         }\r
  60         \r
  61         frame_ptr render_frame()\r
  62         {               \r
  63                 if(!foreground_ || is_paused_)\r
  64                         return last_frame_;\r
  65 \r
  66                 try\r
  67                 {\r
  68                         last_frame_ = foreground_->render_frame();\r
  69 \r
  70                         if(last_frame_ == nullptr)\r
  71                         {\r
  72                                 foreground_ = foreground_->get_following_producer();\r
  73                                 last_frame_ = render_frame();\r
  74                         }\r
  75                 }\r
  76                 catch(...)\r
  77                 {\r
  78                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  79                         CASPAR_LOG(warning) << L"Removed " << (foreground_ ? foreground_->print() : L"null producer") << L" from layer.";\r
  80                         foreground_ = nullptr;\r
  81                         last_frame_ = nullptr;\r
  82                 }\r
  83 \r
  84                 return last_frame_;\r
  85         }       \r
  86                 \r
  87         tbb::atomic<bool> is_paused_;\r
  88         frame_ptr last_frame_;\r
  89         frame_producer_ptr foreground_;\r
  90         frame_producer_ptr background_;\r
  91 };\r
  92 \r
  93 layer::layer() : impl_(new implementation()){}\r
  94 layer::layer(layer&& other) : impl_(std::move(other.impl_)){other.impl_ = nullptr;}\r
  95 layer& layer::operator=(layer&& other)\r
  96 {\r
  97         impl_ = std::move(other.impl_); \r
  98         other.impl_ = nullptr;\r
  99         return *this;\r
 100 }\r
 101 void layer::load(const frame_producer_ptr& frame_producer, load_option::type option){return impl_->load(frame_producer, option);}       \r
 102 void layer::play(){impl_->play();}\r
 103 void layer::pause(){impl_->pause();}\r
 104 void layer::stop(){impl_->stop();}\r
 105 void layer::clear(){impl_->clear();}\r
 106 frame_ptr layer::render_frame() {return impl_->render_frame();}\r
 107 frame_producer_ptr layer::foreground() const { return impl_->foreground_;}\r
 108 frame_producer_ptr layer::background() const { return impl_->background_;}\r
 109 }}