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 <core/producer/frame/basic_frame.h>\r
  27 #include <core/producer/frame/image_transform.h>\r
  28 #include <core/producer/frame/audio_transform.h>\r
  29 \r
  30 namespace caspar { namespace core {     \r
  31 \r
  32 struct transition_producer::implementation : boost::noncopyable\r
  33 {       \r
  34         const transition_producer* self_;\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_factory>  frame_factory_;\r
  43 \r
  44         std::vector<safe_ptr<basic_frame>> frame_buffer_;\r
  45         \r
  46         implementation(const transition_producer* self, const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  47                 : self_(self)\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                 dest_producer_->set_parent(self_);\r
  54                 frame_buffer_.push_back(basic_frame::empty());\r
  55         }\r
  56                                 \r
  57         void set_frame_factory(const safe_ptr<frame_factory>& frame_factory)\r
  58         {\r
  59                 dest_producer_->set_frame_factory(frame_factory);\r
  60                 frame_factory_ = frame_factory;\r
  61         }\r
  62         \r
  63         safe_ptr<frame_producer> get_following_producer() const\r
  64         {\r
  65                 return dest_producer_;\r
  66         }\r
  67         \r
  68         void set_leading_producer(const safe_ptr<frame_producer>& producer)\r
  69         {\r
  70                 source_producer_ = producer;\r
  71                 source_producer_->set_parent(self_);\r
  72         }\r
  73 \r
  74         safe_ptr<basic_frame> receive()\r
  75         {\r
  76                 if(current_frame_++ >= info_.duration)\r
  77                         return basic_frame::eof();\r
  78 \r
  79                 auto source = basic_frame::empty();\r
  80                 auto dest = basic_frame::empty();\r
  81 \r
  82                 tbb::parallel_invoke\r
  83                 (\r
  84                         [&]{dest   = render_sub_frame(dest_producer_);},\r
  85                         [&]{source = render_sub_frame(source_producer_);}\r
  86                 );\r
  87 \r
  88                 return compose(dest, source);\r
  89         }\r
  90         \r
  91         safe_ptr<basic_frame> render_sub_frame(safe_ptr<frame_producer>& producer)\r
  92         {\r
  93                 if(producer == frame_producer::empty())\r
  94                         return basic_frame::eof();\r
  95 \r
  96                 auto frame = basic_frame::eof();\r
  97                 try\r
  98                 {\r
  99                         frame = producer->receive();\r
 100                 }\r
 101                 catch(...)\r
 102                 {\r
 103                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 104                         producer = frame_producer::empty();\r
 105                         CASPAR_LOG(warning) << self_->print() << " Failed to receive frame. Removed producer from transition.";\r
 106                 }\r
 107 \r
 108                 if(frame == basic_frame::eof())\r
 109                 {\r
 110                         try\r
 111                         {\r
 112                                 auto following = producer->get_following_producer();\r
 113                                 following->set_frame_factory(safe_ptr<frame_factory>(frame_factory_));\r
 114                                 following->set_leading_producer(producer);\r
 115                                 following->set_parent(self_);\r
 116                                 producer = std::move(following);\r
 117                         }\r
 118                         catch(...)\r
 119                         {\r
 120                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 121                                 producer = frame_producer::empty();\r
 122                                 CASPAR_LOG(warning) << self_->print() << " Failed to initialize following producer.";\r
 123                         }\r
 124 \r
 125                         return render_sub_frame(producer);\r
 126                 }\r
 127                 return frame;\r
 128         }\r
 129                                         \r
 130         safe_ptr<basic_frame> compose(const safe_ptr<basic_frame>& dest_frame, const safe_ptr<basic_frame>& src_frame) \r
 131         {       \r
 132                 if(dest_frame == basic_frame::eof() && src_frame == basic_frame::eof())\r
 133                         return basic_frame::eof();\r
 134 \r
 135                 if(info_.type == transition::cut)               \r
 136                         return src_frame != basic_frame::eof() ? src_frame : basic_frame::empty();\r
 137                                                                                 \r
 138                 double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, info_.duration*2);\r
 139                 double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, info_.duration*2);  \r
 140 \r
 141                 double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;           \r
 142                 \r
 143                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
 144                 \r
 145                 auto s_frame1 = make_safe<basic_frame>(src_frame);\r
 146                 auto s_frame2 = make_safe<basic_frame>(src_frame);\r
 147 \r
 148                 s_frame1->get_audio_transform().set_has_audio(false);\r
 149                 s_frame2->get_audio_transform().set_gain(1.0-delta2);\r
 150 \r
 151                 auto d_frame1 = make_safe<basic_frame>(dest_frame);\r
 152                 auto d_frame2 = make_safe<basic_frame>(dest_frame);\r
 153                 \r
 154                 d_frame1->get_audio_transform().set_has_audio(false);\r
 155                 d_frame2->get_audio_transform().set_gain(delta2);\r
 156 \r
 157                 if(info_.type == transition::mix)\r
 158                 {\r
 159                         d_frame1->get_image_transform().set_opacity(delta1);    \r
 160                         d_frame2->get_image_transform().set_opacity(delta2);    \r
 161                 }\r
 162                 else if(info_.type == transition::slide)\r
 163                 {\r
 164                         d_frame1->get_image_transform().set_fill_translation((-1.0+delta1)*dir, 0.0);   \r
 165                         d_frame2->get_image_transform().set_fill_translation((-1.0+delta2)*dir, 0.0);           \r
 166                 }\r
 167                 else if(info_.type == transition::push)\r
 168                 {\r
 169                         d_frame1->get_image_transform().set_fill_translation((-1.0+delta1)*dir, 0.0);\r
 170                         d_frame2->get_image_transform().set_fill_translation((-1.0+delta2)*dir, 0.0);\r
 171 \r
 172                         s_frame1->get_image_transform().set_fill_translation((0.0+delta1)*dir, 0.0);    \r
 173                         s_frame2->get_image_transform().set_fill_translation((0.0+delta2)*dir, 0.0);            \r
 174                 }\r
 175                 else if(info_.type == transition::wipe)         \r
 176                 {\r
 177                         d_frame1->get_image_transform().set_key_scale(delta1, 1.0);     \r
 178                         d_frame2->get_image_transform().set_key_scale(delta2, 1.0);                     \r
 179                 }\r
 180                 \r
 181                 auto mode = frame_factory_->get_video_format_desc().mode;\r
 182                 auto s_frame = s_frame1->get_image_transform() == s_frame2->get_image_transform() ? s_frame2 : basic_frame::interlace(s_frame1, s_frame2, mode);\r
 183                 auto d_frame = basic_frame::interlace(d_frame1, d_frame2, mode);\r
 184 \r
 185                 return basic_frame(s_frame, d_frame);\r
 186         }\r
 187 \r
 188         virtual std::wstring print() const\r
 189         {\r
 190                 return L"transition[" + info_.name() + L":" + boost::lexical_cast<std::wstring>(info_.duration) + L"]";\r
 191         }\r
 192 \r
 193         std::wstring source_print() const { return print() + L"/source";}\r
 194         std::wstring dest_print() const { return print() + L"/dest";}\r
 195 };\r
 196 \r
 197 transition_producer::transition_producer(const safe_ptr<frame_producer>& dest, const transition_info& info) : impl_(new implementation(this, dest, info)){}\r
 198 transition_producer::transition_producer(transition_producer&& other) : impl_(std::move(other.impl_)){}\r
 199 safe_ptr<basic_frame> transition_producer::receive(){return impl_->receive();}\r
 200 safe_ptr<frame_producer> transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 201 void transition_producer::set_leading_producer(const safe_ptr<frame_producer>& producer) { impl_->set_leading_producer(producer); }\r
 202 void transition_producer::set_frame_factory(const safe_ptr<frame_factory>& frame_factory) { impl_->set_frame_factory(frame_factory);}\r
 203 std::wstring transition_producer::print() const { return frame_producer::print();}// + impl_->print();}\r
 204 \r
 205 }}\r
 206 \r