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