git.sesse.net Git - casparcg/blob - core/producer/layer.cpp

   1 #include "../stdafx.h"\r
   2 \r
   3 #include "layer.h"\r
   4 #include "frame_producer.h"\r
   5 \r
   6 #include "../video_format.h"\r
   7 \r
   8 #include <common/concurrency/executor.h>\r
   9 #include <common/utility/assert.h>\r
  10 #include <common/utility/printer.h>\r
  11 \r
  12 #include <mixer/frame/basic_frame.h>\r
  13 #include <mixer/image/image_mixer.h>\r
  14 #include <mixer/audio/audio_mixer.h>\r
  15 #include <mixer/audio/audio_transform.h>\r
  16 \r
  17 #include <tbb/spin_mutex.h>\r
  18 \r
  19 namespace caspar { namespace core {\r
  20 \r
  21 class frame_producer_remover\r
  22 {\r
  23         executor executor_;\r
  24         tbb::atomic<int> count_;\r
  25 \r
  26         void do_remove(safe_ptr<frame_producer>& producer)\r
  27         {\r
  28                 auto name = producer->print();\r
  29                 producer = frame_producer::empty();\r
  30                 CASPAR_LOG(info) << name << L" Removed.";\r
  31         }\r
  32 public:\r
  33 \r
  34         frame_producer_remover()\r
  35         {\r
  36                 executor_.start();\r
  37                 count_ = 0;\r
  38         }\r
  39 \r
  40         void remove(safe_ptr<frame_producer>&& producer)\r
  41         {\r
  42                 CASPAR_VERIFY(producer.unique());\r
  43                 executor_.begin_invoke(std::bind(&frame_producer_remover::do_remove, this, std::move(producer)));\r
  44         }\r
  45 };\r
  46 \r
  47 frame_producer_remover g_remover;\r
  48 \r
  49 \r
  50 struct layer::implementation : boost::noncopyable\r
  51 {                               \r
  52         mutable tbb::spin_mutex         printer_mutex_;\r
  53         printer                                         parent_printer_;\r
  54         int                                                     index_;\r
  55         \r
  56         safe_ptr<frame_producer>        foreground_;\r
  57         safe_ptr<frame_producer>        background_;\r
  58         safe_ptr<basic_frame>           last_frame_;\r
  59         bool                                            is_paused_;\r
  60 public:\r
  61         implementation(int index, const printer& parent_printer) \r
  62                 : parent_printer_(parent_printer)\r
  63                 , index_(index)\r
  64                 , foreground_(frame_producer::empty())\r
  65                 , background_(frame_producer::empty())\r
  66                 , last_frame_(basic_frame::empty())\r
  67                 , is_paused_(false){}\r
  68         \r
  69         void load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load, bool preview)\r
  70         {               \r
  71                 background_ = frame_producer;\r
  72                 is_paused_ = false;\r
  73 \r
  74                 if(preview)\r
  75                 {\r
  76                         play();\r
  77                         receive();\r
  78                         pause();\r
  79                 }\r
  80 \r
  81                 if(play_on_load)\r
  82                         play();                         \r
  83         }\r
  84 \r
  85         void play()\r
  86         {                       \r
  87                 if(!is_paused_)                 \r
  88                 {\r
  89                         background_->set_leading_producer(foreground_);\r
  90                         foreground_ = background_;\r
  91                         CASPAR_LOG(info) << foreground_->print() << L" Added.";\r
  92                         background_ = frame_producer::empty();\r
  93                 }\r
  94                 is_paused_ = false;\r
  95         }\r
  96 \r
  97         void pause()\r
  98         {\r
  99                 is_paused_ = true;\r
 100         }\r
 101 \r
 102         void stop()\r
 103         {\r
 104                 pause();\r
 105                 last_frame_ = basic_frame::empty();\r
 106                 foreground_ = frame_producer::empty();\r
 107         }\r
 108                 \r
 109         safe_ptr<basic_frame> receive()\r
 110         {               \r
 111                 if(is_paused_)\r
 112                 {\r
 113                         last_frame_->get_audio_transform().set_gain(0.0);\r
 114                         return last_frame_;\r
 115                 }\r
 116 \r
 117                 try\r
 118                 {\r
 119                         last_frame_ = foreground_->receive(); \r
 120                         if(last_frame_ == basic_frame::eof())\r
 121                         {\r
 122                                 CASPAR_VERIFY(foreground_ != frame_producer::empty());\r
 123 \r
 124                                 auto following = foreground_->get_following_producer();\r
 125                                 following->set_leading_producer(foreground_);\r
 126                                 following->set_parent_printer(boost::bind(&implementation::print, this));\r
 127                                 g_remover.remove(std::move(foreground_));\r
 128                                 foreground_ = following;\r
 129                                 CASPAR_LOG(info) << foreground_->print() << L" Added.";\r
 130 \r
 131                                 last_frame_ = receive();\r
 132                         }\r
 133                 }\r
 134                 catch(...)\r
 135                 {\r
 136                         CASPAR_LOG(error) << print() << L" Unhandled Exception: ";\r
 137                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 138                         stop();\r
 139                 }\r
 140 \r
 141                 return last_frame_;\r
 142         }\r
 143                 \r
 144         std::wstring print() const\r
 145         {\r
 146                 tbb::spin_mutex::scoped_lock lock(printer_mutex_); // Child-producers may call print asynchronously to the producer thread.\r
 147                 return (parent_printer_ ? parent_printer_() + L"/" : L"") + L"layer[" + boost::lexical_cast<std::wstring>(index_) + L"]";\r
 148         }\r
 149 };\r
 150 \r
 151 layer::layer(int index, const printer& parent_printer) : impl_(new implementation(index, parent_printer)){}\r
 152 layer::layer(layer&& other) : impl_(std::move(other.impl_)){}\r
 153 layer& layer::operator=(layer&& other)\r
 154 {\r
 155         impl_ = std::move(other.impl_);\r
 156         return *this;\r
 157 }\r
 158 void layer::swap(layer& other)\r
 159 {\r
 160         impl_.swap(other.impl_);\r
 161         // Printer state is not swapped.\r
 162         tbb::spin_mutex::scoped_lock lock(impl_->printer_mutex_);\r
 163         std::swap(impl_->parent_printer_, other.impl_->parent_printer_);\r
 164         std::swap(impl_->index_, other.impl_->index_);\r
 165 }\r
 166 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load, bool preview){return impl_->load(frame_producer, play_on_load, preview);}   \r
 167 void layer::play(){impl_->play();}\r
 168 void layer::pause(){impl_->pause();}\r
 169 void layer::stop(){impl_->stop();}\r
 170 safe_ptr<basic_frame> layer::receive() {return impl_->receive();}\r
 171 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 172 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 173 std::wstring layer::print() const { return impl_->print();}\r
 174 }}