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 <core/video_format.h>\r
  25 \r
  26 #include <mixer/frame/draw_frame.h>\r
  27 #include <mixer/frame_mixer_device.h>\r
  28 #include <mixer/image/image_transform.h>\r
  29 #include <mixer/audio/audio_mixer.h>\r
  30 #include <mixer/audio/audio_transform.h>\r
  31 \r
  32 #include <boost/range/algorithm/copy.hpp>\r
  33 \r
  34 namespace caspar { namespace core {     \r
  35 \r
  36 struct transition_producer::implementation : boost::noncopyable\r
  37 {       \r
  38         unsigned short                          current_frame_;\r
  39         \r
  40         const transition_info           info_;\r
  41         \r
  42         safe_ptr<frame_producer>        dest_producer_;\r
  43         safe_ptr<frame_producer>        source_producer_;\r
  44 \r
  45         std::shared_ptr<frame_factory>  frame_factory_;\r
  46 \r
  47         implementation(const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  48                 : current_frame_(0)\r
  49                 , info_(info)\r
  50                 , dest_producer_(dest)\r
  51                 , source_producer_(frame_producer::empty()){}\r
  52                                 \r
  53         void initialize(const safe_ptr<frame_factory>& frame_factory)\r
  54         {\r
  55                 dest_producer_->initialize(frame_factory);\r
  56                 frame_factory_ = frame_factory;\r
  57         }\r
  58 \r
  59         safe_ptr<frame_producer> get_following_producer() const\r
  60         {\r
  61                 return dest_producer_;\r
  62         }\r
  63         \r
  64         void set_leading_producer(const safe_ptr<frame_producer>& producer)\r
  65         {\r
  66                 source_producer_ = producer;\r
  67         }\r
  68                 \r
  69         safe_ptr<draw_frame> receive()\r
  70         {\r
  71                 if(current_frame_++ >= info_.duration)\r
  72                         return draw_frame::eof();\r
  73 \r
  74                 auto source = draw_frame::empty();\r
  75                 auto dest = draw_frame::empty();\r
  76 \r
  77                 tbb::parallel_invoke\r
  78                 (\r
  79                         [&]{dest   = render_sub_frame(dest_producer_);},\r
  80                         [&]{source = render_sub_frame(source_producer_);}\r
  81                 );\r
  82 \r
  83                 return compose(dest, source);\r
  84         }\r
  85         \r
  86         safe_ptr<draw_frame> render_sub_frame(safe_ptr<frame_producer>& producer)\r
  87         {\r
  88                 if(producer == frame_producer::empty())\r
  89                         return draw_frame::eof();\r
  90 \r
  91                 auto frame = draw_frame::eof();\r
  92                 try\r
  93                 {\r
  94                         frame = producer->receive();\r
  95                 }\r
  96                 catch(...)\r
  97                 {\r
  98                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  99                         producer = frame_producer::empty();\r
 100                         CASPAR_LOG(warning) << "Failed to receive frame. Removed producer from transition.";\r
 101                 }\r
 102 \r
 103                 if(frame == draw_frame::eof())\r
 104                 {\r
 105                         try\r
 106                         {\r
 107                                 auto following = producer->get_following_producer();\r
 108                                 following->initialize(safe_ptr<frame_factory>(frame_factory_));\r
 109                                 following->set_leading_producer(producer);\r
 110                                 producer = std::move(following);\r
 111                         }\r
 112                         catch(...)\r
 113                         {\r
 114                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 115                                 producer = frame_producer::empty();\r
 116                                 CASPAR_LOG(warning) << "Failed to initialize following producer.";\r
 117                         }\r
 118 \r
 119                         return render_sub_frame(producer);\r
 120                 }\r
 121                 return frame;\r
 122         }\r
 123                                         \r
 124         safe_ptr<draw_frame> compose(const safe_ptr<draw_frame>& dest_frame, const safe_ptr<draw_frame>& src_frame) \r
 125         {       \r
 126                 if(dest_frame == draw_frame::eof() && src_frame == draw_frame::eof())\r
 127                         return draw_frame::eof();\r
 128 \r
 129                 if(info_.type == transition::cut)               \r
 130                         return src_frame != draw_frame::eof() ? src_frame : draw_frame::empty();\r
 131                                                                                 \r
 132                 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);\r
 133 \r
 134                 auto my_src_frame = draw_frame(src_frame);\r
 135                 auto my_dest_frame = draw_frame(dest_frame);\r
 136 \r
 137                 my_src_frame.get_audio_transform().set_gain(1.0-alpha);\r
 138                 my_dest_frame.get_audio_transform().set_gain(alpha);\r
 139 \r
 140                 double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;           \r
 141                 \r
 142                 if(info_.type == transition::mix)\r
 143                         my_dest_frame.get_image_transform().set_opacity(alpha);         \r
 144                 else if(info_.type == transition::slide)                        \r
 145                         my_dest_frame.get_image_transform().set_image_translation((-1.0+alpha)*dir, 0.0);                       \r
 146                 else if(info_.type == transition::push)\r
 147                 {\r
 148                         my_dest_frame.get_image_transform().set_image_translation((-1.0+alpha)*dir, 0.0);\r
 149                         my_src_frame.get_image_transform().set_image_translation((0.0+alpha)*dir, 0.0);         \r
 150                 }\r
 151                 else if(info_.type == transition::wipe)         \r
 152                         my_dest_frame.get_image_transform().set_mask_scale(alpha, 1.0);                 \r
 153 \r
 154                 return draw_frame(std::move(my_src_frame), std::move(my_dest_frame));\r
 155         }\r
 156 \r
 157         std::wstring print() const\r
 158         {\r
 159                 return L"transition[" + (source_producer_->print()) + L" -> " + (dest_producer_->print()) + L"]";\r
 160         }\r
 161 };\r
 162 \r
 163 transition_producer::transition_producer(transition_producer&& other) : impl_(std::move(other.impl_)){}\r
 164 transition_producer::transition_producer(const safe_ptr<frame_producer>& dest, const transition_info& info) : impl_(new implementation(dest, info)){}\r
 165 safe_ptr<draw_frame> transition_producer::receive(){return impl_->receive();}\r
 166 safe_ptr<frame_producer> transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 167 void transition_producer::set_leading_producer(const safe_ptr<frame_producer>& producer) { impl_->set_leading_producer(producer); }\r
 168 void transition_producer::initialize(const safe_ptr<frame_factory>& frame_factory) { impl_->initialize(frame_factory);}\r
 169 std::wstring transition_producer::print() const { return impl_->print();}\r
 170 \r
 171 }}\r
 172 \r