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 \r
  11 #include <mixer/frame/draw_frame.h>\r
  12 #include <mixer/image/image_mixer.h>\r
  13 #include <mixer/audio/audio_mixer.h>\r
  14 #include <mixer/audio/audio_transform.h>\r
  15 \r
  16 namespace caspar { namespace core {\r
  17 \r
  18 class frame_producer_remover\r
  19 {\r
  20         executor executor_;\r
  21 \r
  22         void do_remove(safe_ptr<frame_producer>& producer)\r
  23         {\r
  24                 auto name = producer->print();\r
  25                 CASPAR_LOG(info) << "removing: " << name;\r
  26                 producer = frame_producer::empty();\r
  27                 CASPAR_LOG(info) << "removed: " << name;\r
  28         }\r
  29 public:\r
  30 \r
  31         frame_producer_remover()\r
  32         {\r
  33                 executor_.start();\r
  34         }\r
  35 \r
  36         void remove(safe_ptr<frame_producer>&& producer)\r
  37         {\r
  38                 CASPAR_ASSERT(producer.unique());\r
  39                 CASPAR_ASSERT(executor_.empty());\r
  40                 executor_.begin_invoke(std::bind(&frame_producer_remover::do_remove, this, std::move(producer)));\r
  41         }\r
  42 };\r
  43 \r
  44 frame_producer_remover g_remover;\r
  45 \r
  46 struct layer::implementation : boost::noncopyable\r
  47 {                                       \r
  48         safe_ptr<frame_producer>        foreground_;\r
  49         safe_ptr<frame_producer>        background_;\r
  50         safe_ptr<draw_frame>            last_frame_;\r
  51         bool                                            is_paused_;\r
  52 \r
  53 public:\r
  54         implementation() \r
  55                 : foreground_(frame_producer::empty())\r
  56                 , background_(frame_producer::empty())\r
  57                 , last_frame_(draw_frame::empty())\r
  58                 , is_paused_(false){}\r
  59         \r
  60         void load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load)\r
  61         {                       \r
  62                 background_ = frame_producer;\r
  63                 if(play_on_load)\r
  64                         play(true);             \r
  65         }\r
  66 \r
  67         void preview(const safe_ptr<frame_producer>& frame_producer)\r
  68         {\r
  69                 load(frame_producer, true);\r
  70                 receive();\r
  71                 pause();\r
  72         }\r
  73         \r
  74         void play(bool force = false)\r
  75         {                       \r
  76                 if(!is_paused_ || force)                        \r
  77                 {\r
  78                         background_->set_leading_producer(foreground_);\r
  79                         foreground_ = background_;\r
  80                         background_ = frame_producer::empty();\r
  81                 }\r
  82                 is_paused_ = false;\r
  83         }\r
  84 \r
  85         void pause()\r
  86         {\r
  87                 is_paused_ = true;\r
  88         }\r
  89 \r
  90         void stop()\r
  91         {\r
  92                 pause();\r
  93                 last_frame_ = draw_frame::empty();\r
  94                 foreground_ = frame_producer::empty();\r
  95         }\r
  96 \r
  97         void clear()\r
  98         {\r
  99                 stop();\r
 100                 background_ = frame_producer::empty();\r
 101         }\r
 102         \r
 103         safe_ptr<draw_frame> receive()\r
 104         {               \r
 105                 if(is_paused_)\r
 106                 {\r
 107                         last_frame_->get_audio_transform().set_gain(0.0);\r
 108                         return last_frame_;\r
 109                 }\r
 110 \r
 111                 try\r
 112                 {\r
 113                         last_frame_ = foreground_->receive(); \r
 114                         if(last_frame_ == draw_frame::eof())\r
 115                         {\r
 116                                 CASPAR_ASSERT(foreground_ != frame_producer::empty());\r
 117 \r
 118                                 auto following = foreground_->get_following_producer();\r
 119                                 following->set_leading_producer(foreground_);\r
 120                                 g_remover.remove(std::move(foreground_));\r
 121                                 foreground_ = following;\r
 122 \r
 123                                 last_frame_ = receive();\r
 124                         }\r
 125                 }\r
 126                 catch(...)\r
 127                 {\r
 128                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 129                         stop();\r
 130                 }\r
 131 \r
 132                 return last_frame_;\r
 133         }\r
 134 };\r
 135 \r
 136 layer::layer() \r
 137 {\r
 138         impl_ = new implementation();\r
 139 }\r
 140 layer::layer(layer&& other) \r
 141 {\r
 142         impl_ = other.impl_.compare_and_swap(nullptr, other.impl_);\r
 143 }\r
 144 layer::~layer()\r
 145 {\r
 146         delete impl_.fetch_and_store(nullptr);\r
 147 }\r
 148 layer& layer::operator=(layer&& other)\r
 149 {\r
 150         impl_ = other.impl_.compare_and_swap(nullptr, other.impl_);\r
 151         return *this;\r
 152 }\r
 153 void layer::swap(layer& other)\r
 154 {\r
 155         impl_ = other.impl_.compare_and_swap(impl_, other.impl_);\r
 156 }\r
 157 void layer::load(const safe_ptr<frame_producer>& frame_producer, bool play_on_load){return impl_->load(frame_producer, play_on_load);}  \r
 158 void layer::preview(const safe_ptr<frame_producer>& frame_producer){return impl_->preview(frame_producer);}     \r
 159 void layer::play(){impl_->play();}\r
 160 void layer::pause(){impl_->pause();}\r
 161 void layer::stop(){impl_->stop();}\r
 162 void layer::clear(){impl_->clear();}\r
 163 safe_ptr<draw_frame> layer::receive() {return impl_->receive();}\r
 164 safe_ptr<frame_producer> layer::foreground() const { return impl_->foreground_;}\r
 165 safe_ptr<frame_producer> layer::background() const { return impl_->background_;}\r
 166 }}