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