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/image/image_transform.h>\r
  28 #include <mixer/audio/audio_mixer.h>\r
  29 #include <mixer/audio/audio_transform.h>\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_factory>  frame_factory_;\r
  43         video_format_desc                               format_desc_;\r
  44 \r
  45         std::vector<safe_ptr<draw_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                 frame_buffer_.push_back(draw_frame::empty());\r
  54         }\r
  55                                 \r
  56         void initialize(const safe_ptr<frame_factory>& frame_factory)\r
  57         {\r
  58                 dest_producer_->initialize(frame_factory);\r
  59                 frame_factory_ = frame_factory;\r
  60                 format_desc_ = frame_factory_->get_video_format_desc();\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         }\r
  72 \r
  73         safe_ptr<draw_frame> receive()\r
  74         {\r
  75                 if(current_frame_++ >= info_.duration)\r
  76                         return draw_frame::eof();\r
  77 \r
  78                 auto source = draw_frame::empty();\r
  79                 auto dest = draw_frame::empty();\r
  80 \r
  81                 tbb::parallel_invoke\r
  82                 (\r
  83                         [&]{dest   = render_sub_frame(dest_producer_);},\r
  84                         [&]{source = render_sub_frame(source_producer_);}\r
  85                 );\r
  86 \r
  87                 return compose(dest, source);\r
  88         }\r
  89         \r
  90         safe_ptr<draw_frame> render_sub_frame(safe_ptr<frame_producer>& producer)\r
  91         {\r
  92                 if(producer == frame_producer::empty())\r
  93                         return draw_frame::eof();\r
  94 \r
  95                 auto frame = draw_frame::eof();\r
  96                 try\r
  97                 {\r
  98                         frame = producer->receive();\r
  99                 }\r
 100                 catch(...)\r
 101                 {\r
 102                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 103                         producer = frame_producer::empty();\r
 104                         CASPAR_LOG(warning) << print() << " Failed to receive frame. Removed producer from transition.";\r
 105                 }\r
 106 \r
 107                 if(frame == draw_frame::eof())\r
 108                 {\r
 109                         try\r
 110                         {\r
 111                                 auto following = producer->get_following_producer();\r
 112                                 following->initialize(safe_ptr<frame_factory>(frame_factory_));\r
 113                                 following->set_leading_producer(producer);\r
 114                                 producer = std::move(following);\r
 115                         }\r
 116                         catch(...)\r
 117                         {\r
 118                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 119                                 producer = frame_producer::empty();\r
 120                                 CASPAR_LOG(warning) << print() << " Failed to initialize following producer.";\r
 121                         }\r
 122 \r
 123                         return render_sub_frame(producer);\r
 124                 }\r
 125                 return frame;\r
 126         }\r
 127                                         \r
 128         safe_ptr<draw_frame> compose(const safe_ptr<draw_frame>& dest_frame, const safe_ptr<draw_frame>& src_frame) \r
 129         {       \r
 130                 if(dest_frame == draw_frame::eof() && src_frame == draw_frame::eof())\r
 131                         return draw_frame::eof();\r
 132 \r
 133                 if(info_.type == transition::cut)               \r
 134                         return src_frame != draw_frame::eof() ? src_frame : draw_frame::empty();\r
 135                                                                                 \r
 136                 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);\r
 137                 double half_alpha_step = 0.5*1.0/static_cast<double>(info_.duration);\r
 138                 \r
 139                 double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;           \r
 140                 \r
 141                 // For interalced transitions; seperate fields into seperate frames which are transitioned accordingly.\r
 142 \r
 143                 auto s_frame1 = make_safe<draw_frame>(src_frame);\r
 144                 auto s_frame2 = make_safe<draw_frame>(src_frame);\r
 145 \r
 146                 s_frame1->get_audio_transform().set_gain(0);\r
 147                 s_frame2->get_audio_transform().set_gain(1.0-alpha);\r
 148 \r
 149                 auto d_frame1 = make_safe<draw_frame>(dest_frame);\r
 150                 auto d_frame2 = make_safe<draw_frame>(dest_frame);\r
 151                 \r
 152                 d_frame1->get_audio_transform().set_gain(0);\r
 153                 d_frame2->get_audio_transform().set_gain(alpha);\r
 154 \r
 155                 if(info_.type == transition::mix)\r
 156                 {\r
 157                         d_frame1->get_image_transform().set_opacity(alpha-half_alpha_step);     \r
 158                         d_frame2->get_image_transform().set_opacity(alpha);     \r
 159                 }\r
 160                 else if(info_.type == transition::slide)\r
 161                 {\r
 162                         d_frame1->get_image_transform().set_image_translation((-1.0+alpha-half_alpha_step)*dir, 0.0);   \r
 163                         d_frame2->get_image_transform().set_image_translation((-1.0+alpha)*dir, 0.0);           \r
 164                 }\r
 165                 else if(info_.type == transition::push)\r
 166                 {\r
 167                         d_frame1->get_image_transform().set_image_translation((-1.0+alpha-half_alpha_step)*dir, 0.0);\r
 168                         d_frame2->get_image_transform().set_image_translation((-1.0+alpha)*dir, 0.0);\r
 169 \r
 170                         s_frame1->get_image_transform().set_image_translation((0.0+alpha-half_alpha_step)*dir, 0.0);    \r
 171                         s_frame2->get_image_transform().set_image_translation((0.0+alpha)*dir, 0.0);            \r
 172                 }\r
 173                 else if(info_.type == transition::wipe)         \r
 174                 {\r
 175                         d_frame1->get_image_transform().set_mask_scale(alpha-half_alpha_step, 1.0);     \r
 176                         d_frame2->get_image_transform().set_mask_scale(alpha, 1.0);                     \r
 177                 }\r
 178                 \r
 179                 return draw_frame(draw_frame::interlace(s_frame1, s_frame2, format_desc_.mode), draw_frame::interlace(d_frame1, d_frame2, format_desc_.mode));\r
 180         }\r
 181 \r
 182         std::wstring print() const\r
 183         {\r
 184                 return L"transition[" + source_producer_->print() + L"->" + dest_producer_->print() + L"]";\r
 185         }\r
 186 };\r
 187 \r
 188 transition_producer::transition_producer(transition_producer&& other) : impl_(std::move(other.impl_)){}\r
 189 transition_producer::transition_producer(const safe_ptr<frame_producer>& dest, const transition_info& info) : impl_(new implementation(dest, info)){}\r
 190 safe_ptr<draw_frame> transition_producer::receive(){return impl_->receive();}\r
 191 safe_ptr<frame_producer> transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 192 void transition_producer::set_leading_producer(const safe_ptr<frame_producer>& producer) { impl_->set_leading_producer(producer); }\r
 193 void transition_producer::initialize(const safe_ptr<frame_factory>& frame_factory) { impl_->initialize(frame_factory);}\r
 194 std::wstring transition_producer::print() const { return impl_->print();}\r
 195 \r
 196 }}\r
 197 \r