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/producer_frame.h"\r
  26 #include "../../processor/composite_frame.h"\r
  27 #include "../../processor/transform_frame.h"\r
  28 #include "../../processor/frame_processor_device.h"\r
  29 \r
  30 #include "../../producer/frame_producer_device.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         implementation(const frame_producer_ptr& dest, const transition_info& info) \r
  39                 : current_frame_(0), info_(info), dest_producer_(dest), org_dest_producer_(dest)\r
  40         {\r
  41                 if(!dest)\r
  42                         BOOST_THROW_EXCEPTION(null_argument() << arg_name_info("dest"));\r
  43         }\r
  44                 \r
  45         frame_producer_ptr get_following_producer() const\r
  46         {\r
  47                 return dest_producer_;\r
  48         }\r
  49         \r
  50         void set_leading_producer(const frame_producer_ptr& producer)\r
  51         {\r
  52                 org_source_producer_ = source_producer_ = producer;\r
  53         }\r
  54                 \r
  55         producer_frame receive()\r
  56         {\r
  57                 if(current_frame_ == 0)\r
  58                         CASPAR_LOG(info) << "Transition started.";\r
  59 \r
  60                 producer_frame result = [&]() -> producer_frame\r
  61                 {\r
  62                         if(current_frame_++ >= info_.duration)\r
  63                                 return producer_frame::eof();\r
  64 \r
  65                         producer_frame source;\r
  66                         producer_frame dest;\r
  67 \r
  68                         tbb::parallel_invoke\r
  69                         (\r
  70                                 [&]{dest   = receive(dest_producer_);},\r
  71                                 [&]{source = receive(source_producer_);}\r
  72                         );\r
  73 \r
  74                         return compose(dest, source);\r
  75                 }();\r
  76 \r
  77                 if(result == producer_frame::eof())\r
  78                         CASPAR_LOG(info) << "Transition ended.";\r
  79 \r
  80                 return result;\r
  81         }\r
  82 \r
  83         producer_frame receive(frame_producer_ptr& producer)\r
  84         {\r
  85                 if(!producer)\r
  86                         return producer_frame::eof();\r
  87 \r
  88                 producer_frame frame = producer_frame::eof();\r
  89                 try\r
  90                 {\r
  91                         frame = producer->receive();\r
  92                 }\r
  93                 catch(...)\r
  94                 {\r
  95                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  96                         producer = nullptr;\r
  97                         CASPAR_LOG(warning) << "Removed producer from transition.";\r
  98                 }\r
  99 \r
 100                 if(frame == producer_frame::eof())\r
 101                 {\r
 102                         if(!producer || !producer->get_following_producer())\r
 103                                 return producer_frame::eof();\r
 104 \r
 105                         try\r
 106                         {\r
 107                                 auto following = producer->get_following_producer();\r
 108                                 following->initialize(frame_processor_);\r
 109                                 following->set_leading_producer(producer);\r
 110                                 producer = following;\r
 111                         }\r
 112                         catch(...)\r
 113                         {\r
 114                                 CASPAR_LOG(warning) << "Failed to initialize following producer. Removing it.";\r
 115                                 producer = nullptr;\r
 116                         }\r
 117 \r
 118                         return receive(producer);\r
 119                 }\r
 120                 return frame;\r
 121         }\r
 122                                         \r
 123         producer_frame compose(producer_frame dest_frame, producer_frame src_frame) \r
 124         {       \r
 125                 if(dest_frame == producer_frame::eof() && src_frame == producer_frame::eof())\r
 126                         return producer_frame::eof();\r
 127 \r
 128                 if(info_.type == transition::cut)               \r
 129                         return src_frame;\r
 130                                                                                 \r
 131                 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);\r
 132                 unsigned char volume = static_cast<unsigned char>(alpha*256.0);\r
 133 \r
 134                 auto my_src_frame = std::make_shared<transform_frame>(src_frame);\r
 135                 auto my_dest_frame = std::make_shared<transform_frame>(dest_frame);\r
 136 \r
 137                 my_src_frame->audio_volume(255-volume);\r
 138                 my_dest_frame->audio_volume(volume);\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->alpha(alpha);            \r
 144                 else if(info_.type == transition::slide)                        \r
 145                         my_dest_frame->translate((-1.0+alpha)*dir, 0.0);                        \r
 146                 else if(info_.type == transition::push)\r
 147                 {\r
 148                         my_dest_frame->translate((-1.0+alpha)*dir, 0.0);\r
 149                         my_src_frame->translate((0.0+alpha)*dir, 0.0);\r
 150                 }\r
 151                 else if(info_.type == transition::wipe)\r
 152                 {\r
 153                         my_dest_frame->translate((-1.0+alpha)*dir, 0.0);                        \r
 154                         my_dest_frame->texcoord((-1.0+alpha)*dir, 1.0, 1.0-(1.0-alpha)*dir, 0.0);                               \r
 155                 }\r
 156                                                 \r
 157                 return std::make_shared<composite_frame>(my_src_frame, my_dest_frame);\r
 158         }\r
 159                 \r
 160         void initialize(const frame_processor_device_ptr& frame_processor)\r
 161         {\r
 162                 dest_producer_->initialize(frame_processor);\r
 163                 frame_processor_ = frame_processor;\r
 164         }\r
 165 \r
 166         std::wstring print() const\r
 167         {\r
 168                 return L"transition_producer. dest: " + (org_dest_producer_ ? org_dest_producer_->print() : L"empty") + L" src: " + (org_source_producer_ ? org_source_producer_->print() : L"empty");\r
 169         }\r
 170         \r
 171         frame_producer_ptr                      org_source_producer_;\r
 172         frame_producer_ptr                      org_dest_producer_;\r
 173 \r
 174         frame_producer_ptr                      source_producer_;\r
 175         frame_producer_ptr                      dest_producer_;\r
 176         \r
 177         unsigned short                          current_frame_;\r
 178         \r
 179         const transition_info           info_;\r
 180         frame_processor_device_ptr      frame_processor_;\r
 181 };\r
 182 \r
 183 transition_producer::transition_producer(const frame_producer_ptr& dest, const transition_info& info) : impl_(new implementation(dest, info)){}\r
 184 producer_frame transition_producer::receive(){return impl_->receive();}\r
 185 frame_producer_ptr transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 186 void transition_producer::set_leading_producer(const frame_producer_ptr& producer) { impl_->set_leading_producer(producer); }\r
 187 void transition_producer::initialize(const frame_processor_device_ptr& frame_processor) { impl_->initialize(frame_processor);}\r
 188 std::wstring transition_producer::print() const { return impl_->print();}\r
 189 \r
 190 }}\r
 191 \r