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

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\r
   5 *\r
   6 *    CasparCG is free software: you can redistribute it and/or modify\r
   7 *    it under the terms of the GNU General Public License as published by\r
   8 *    the Free Software Foundation, either version 3 of the License, or\r
   9 *    (at your option) any later version.\r
  10 *\r
  11 *    CasparCG is distributed in the hope that it will be useful,\r
  12 *    but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 *    GNU General Public License for more details.\r
  15 \r
  16 *    You should have received a copy of the GNU General Public License\r
  17 *    along with CasparCG.  If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 */ \r
  20 #include "../../stdafx.h"\r
  21 \r
  22 #include "transition_producer.h"\r
  23 \r
  24 #include "../../video_format.h"\r
  25 #include "../../mixer/frame/draw_frame.h"\r
  26 #include "../../mixer/frame_mixer_device.h"\r
  27 #include "../../mixer/image/image_transform.h"\r
  28 #include "../../mixer/audio/audio_mixer.h"\r
  29 #include "../../mixer/audio/audio_transform.h"\r
  30 \r
  31 #include <boost/range/algorithm/copy.hpp>\r
  32 \r
  33 namespace caspar { namespace core {     \r
  34 \r
  35 struct transition_producer::implementation : boost::noncopyable\r
  36 {       \r
  37         unsigned short                          current_frame_;\r
  38         \r
  39         const transition_info           info_;\r
  40         \r
  41         safe_ptr<frame_producer>        dest_producer_;\r
  42         safe_ptr<frame_producer>        source_producer_;\r
  43 \r
  44         std::shared_ptr<frame_factory>  frame_factory_;\r
  45 \r
  46         implementation(const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  47                 : current_frame_(0)\r
  48                 , info_(info)\r
  49                 , dest_producer_(dest)\r
  50                 , source_producer_(frame_producer::empty()){}\r
  51                                 \r
  52         void initialize(const safe_ptr<frame_factory>& frame_factory)\r
  53         {\r
  54                 dest_producer_->initialize(frame_factory);\r
  55                 frame_factory_ = frame_factory;\r
  56         }\r
  57 \r
  58         safe_ptr<frame_producer> get_following_producer() const\r
  59         {\r
  60                 return dest_producer_;\r
  61         }\r
  62         \r
  63         void set_leading_producer(const safe_ptr<frame_producer>& producer)\r
  64         {\r
  65                 source_producer_ = producer;\r
  66         }\r
  67                 \r
  68         safe_ptr<draw_frame> receive()\r
  69         {\r
  70                 if(current_frame_++ >= info_.duration)\r
  71                         return draw_frame::eof();\r
  72 \r
  73                 auto source = draw_frame::empty();\r
  74                 auto dest = draw_frame::empty();\r
  75 \r
  76                 tbb::parallel_invoke\r
  77                 (\r
  78                         [&]{dest   = render_sub_frame(dest_producer_);},\r
  79                         [&]{source = render_sub_frame(source_producer_);}\r
  80                 );\r
  81 \r
  82                 return compose(dest, source);\r
  83         }\r
  84         \r
  85         safe_ptr<draw_frame> render_sub_frame(safe_ptr<frame_producer>& producer)\r
  86         {\r
  87                 if(producer == frame_producer::empty())\r
  88                         return draw_frame::eof();\r
  89 \r
  90                 auto frame = draw_frame::eof();\r
  91                 try\r
  92                 {\r
  93                         frame = producer->receive();\r
  94                 }\r
  95                 catch(...)\r
  96                 {\r
  97                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  98                         producer = frame_producer::empty();\r
  99                         CASPAR_LOG(warning) << "Failed to receive frame. Removed producer from transition.";\r
 100                 }\r
 101 \r
 102                 if(frame == draw_frame::eof())\r
 103                 {\r
 104                         try\r
 105                         {\r
 106                                 auto following = producer->get_following_producer();\r
 107                                 following->initialize(safe_ptr<frame_factory>(frame_factory_));\r
 108                                 following->set_leading_producer(producer);\r
 109                                 producer = std::move(following);\r
 110                         }\r
 111                         catch(...)\r
 112                         {\r
 113                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 114                                 producer = frame_producer::empty();\r
 115                                 CASPAR_LOG(warning) << "Failed to initialize following producer.";\r
 116                         }\r
 117 \r
 118                         return render_sub_frame(producer);\r
 119                 }\r
 120                 return frame;\r
 121         }\r
 122                                         \r
 123         safe_ptr<draw_frame> compose(const safe_ptr<draw_frame>& dest_frame, const safe_ptr<draw_frame>& src_frame) \r
 124         {       \r
 125                 if(dest_frame == draw_frame::eof() && src_frame == draw_frame::eof())\r
 126                         return draw_frame::eof();\r
 127 \r
 128                 if(info_.type == transition::cut)               \r
 129                         return src_frame != draw_frame::eof() ? src_frame : draw_frame::empty();\r
 130                                                                                 \r
 131                 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);\r
 132 \r
 133                 auto my_src_frame = draw_frame(src_frame);\r
 134                 auto my_dest_frame = draw_frame(dest_frame);\r
 135 \r
 136                 my_src_frame.get_audio_transform().set_gain(1.0-alpha);\r
 137                 my_dest_frame.get_audio_transform().set_gain(alpha);\r
 138 \r
 139                 double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;           \r
 140                 \r
 141                 if(info_.type == transition::mix)\r
 142                         my_dest_frame.get_image_transform().set_opacity(alpha);         \r
 143                 else if(info_.type == transition::slide)                        \r
 144                         my_dest_frame.get_image_transform().set_image_translation((-1.0+alpha)*dir, 0.0);                       \r
 145                 else if(info_.type == transition::push)\r
 146                 {\r
 147                         my_dest_frame.get_image_transform().set_image_translation((-1.0+alpha)*dir, 0.0);\r
 148                         my_src_frame.get_image_transform().set_image_translation((0.0+alpha)*dir, 0.0);         \r
 149                 }\r
 150                 else if(info_.type == transition::wipe)         \r
 151                         my_dest_frame.get_image_transform().set_mask_scale(alpha, 1.0);                 \r
 152 \r
 153                 return draw_frame(std::move(my_src_frame), std::move(my_dest_frame));\r
 154         }\r
 155 \r
 156         std::wstring print() const\r
 157         {\r
 158                 return L"transition[" + (source_producer_->print()) + L" -> " + (dest_producer_->print()) + L"]";\r
 159         }\r
 160 };\r
 161 \r
 162 transition_producer::transition_producer(transition_producer&& other) : impl_(std::move(other.impl_)){}\r
 163 transition_producer::transition_producer(const safe_ptr<frame_producer>& dest, const transition_info& info) : impl_(new implementation(dest, info)){}\r
 164 safe_ptr<draw_frame> transition_producer::receive(){return impl_->receive();}\r
 165 safe_ptr<frame_producer> transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 166 void transition_producer::set_leading_producer(const safe_ptr<frame_producer>& producer) { impl_->set_leading_producer(producer); }\r
 167 void transition_producer::initialize(const safe_ptr<frame_factory>& frame_factory) { impl_->initialize(frame_factory);}\r
 168 std::wstring transition_producer::print() const { return impl_->print();}\r
 169 \r
 170 }}\r
 171 \r