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/frame_transform.h>\r
  28 \r
  29 #include <tbb/parallel_invoke.h>\r
  30 \r
  31 #include <boost/assign.hpp>\r
  32 \r
  33 using namespace boost::assign;\r
  34 \r
  35 namespace caspar { namespace core {     \r
  36 \r
  37 struct transition_producer : public frame_producer\r
  38 {       \r
  39         const field_mode::type          mode_;\r
  40         unsigned int                            current_frame_;\r
  41         \r
  42         const transition_info           info_;\r
  43         \r
  44         safe_ptr<frame_producer>        dest_producer_;\r
  45         safe_ptr<frame_producer>        source_producer_;\r
  46 \r
  47         safe_ptr<basic_frame>           last_frame_;\r
  48                 \r
  49         explicit transition_producer(const field_mode::type& mode, const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  50                 : mode_(mode)\r
  51                 , current_frame_(0)\r
  52                 , info_(info)\r
  53                 , dest_producer_(dest)\r
  54                 , source_producer_(frame_producer::empty())\r
  55                 , last_frame_(basic_frame::empty()){}\r
  56         \r
  57         // frame_producer\r
  58 \r
  59         virtual safe_ptr<frame_producer> get_following_producer() const\r
  60         {\r
  61                 return dest_producer_;\r
  62         }\r
  63         \r
  64         virtual void set_leading_producer(const safe_ptr<frame_producer>& producer)\r
  65         {\r
  66                 source_producer_ = producer;\r
  67         }\r
  68 \r
  69         virtual safe_ptr<basic_frame> receive(int hints)\r
  70         {\r
  71                 if(++current_frame_ >= info_.duration)\r
  72                         return basic_frame::eof();\r
  73                 \r
  74                 auto dest = basic_frame::empty();\r
  75                 auto source = basic_frame::empty();\r
  76 \r
  77                 tbb::parallel_invoke(\r
  78                 [&]\r
  79                 {\r
  80                         dest = receive_and_follow(dest_producer_, hints);\r
  81                         if(dest == core::basic_frame::late())\r
  82                                 dest = dest_producer_->last_frame();\r
  83                 },\r
  84                 [&]\r
  85                 {\r
  86                         source = receive_and_follow(source_producer_, hints);\r
  87                         if(source == core::basic_frame::late())\r
  88                                 source = source_producer_->last_frame();\r
  89                 });\r
  90 \r
  91                 return compose(dest, source);\r
  92         }\r
  93 \r
  94         virtual safe_ptr<core::basic_frame> last_frame() const\r
  95         {\r
  96                 return disable_audio(last_frame_);\r
  97         }\r
  98 \r
  99         virtual int64_t nb_frames() const \r
 100         {\r
 101                 return get_following_producer()->nb_frames();\r
 102         }\r
 103 \r
 104         virtual std::wstring print() const\r
 105         {\r
 106                 return L"transition[" + source_producer_->print() + L"|" + dest_producer_->print() + L"]";\r
 107         }\r
 108         \r
 109         // transition_producer\r
 110                                                 \r
 111         safe_ptr<basic_frame> compose(const safe_ptr<basic_frame>& dest_frame, const safe_ptr<basic_frame>& src_frame) \r
 112         {       \r
 113                 if(info_.type == transition::cut)               \r
 114                         return src_frame;\r
 115                                                                                 \r
 116                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, info_.duration*2);\r
 117                 const double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, info_.duration*2);  \r
 118 \r
 119                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;             \r
 120                 \r
 121                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
 122                 \r
 123                 auto s_frame1 = make_safe<basic_frame>(src_frame);\r
 124                 auto s_frame2 = make_safe<basic_frame>(src_frame);\r
 125 \r
 126                 s_frame1->get_frame_transform().volume = 0.0;\r
 127                 s_frame2->get_frame_transform().volume = 1.0-delta2;\r
 128 \r
 129                 auto d_frame1 = make_safe<basic_frame>(dest_frame);\r
 130                 auto d_frame2 = make_safe<basic_frame>(dest_frame);\r
 131                 \r
 132                 d_frame1->get_frame_transform().volume = 0.0;\r
 133                 d_frame2->get_frame_transform().volume = delta2;\r
 134 \r
 135                 if(info_.type == transition::mix)\r
 136                 {\r
 137                         d_frame1->get_frame_transform().opacity = delta1;       \r
 138                         d_frame1->get_frame_transform().is_mix = true;\r
 139                         d_frame2->get_frame_transform().opacity = delta2;\r
 140                         d_frame2->get_frame_transform().is_mix = true;\r
 141 \r
 142                         s_frame1->get_frame_transform().opacity = 1.0-delta1;   \r
 143                         s_frame1->get_frame_transform().is_mix = true;\r
 144                         s_frame2->get_frame_transform().opacity = 1.0-delta2;   \r
 145                         s_frame2->get_frame_transform().is_mix = true;\r
 146                 }\r
 147                 if(info_.type == transition::slide)\r
 148                 {\r
 149                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;        \r
 150                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;                \r
 151                 }\r
 152                 else if(info_.type == transition::push)\r
 153                 {\r
 154                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;\r
 155                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;\r
 156 \r
 157                         s_frame1->get_frame_transform().fill_translation[0] = (0.0+delta1)*dir; \r
 158                         s_frame2->get_frame_transform().fill_translation[0] = (0.0+delta2)*dir;         \r
 159                 }\r
 160                 else if(info_.type == transition::wipe)         \r
 161                 {\r
 162                         d_frame1->get_frame_transform().clip_scale[0] = delta1; \r
 163                         d_frame2->get_frame_transform().clip_scale[0] = delta2;                 \r
 164                 }\r
 165                                 \r
 166                 const auto s_frame = s_frame1->get_frame_transform() == s_frame2->get_frame_transform() ? s_frame2 : basic_frame::interlace(s_frame1, s_frame2, mode_);\r
 167                 const auto d_frame = d_frame1->get_frame_transform() == d_frame2->get_frame_transform() ? d_frame2 : basic_frame::interlace(d_frame1, d_frame2, mode_);\r
 168                 \r
 169                 last_frame_ = basic_frame::combine(s_frame2, d_frame2);\r
 170 \r
 171                 return basic_frame::combine(s_frame, d_frame);\r
 172         }\r
 173 };\r
 174 \r
 175 safe_ptr<frame_producer> create_transition_producer(const field_mode::type& mode, const safe_ptr<frame_producer>& destination, const transition_info& info)\r
 176 {\r
 177         return make_safe<transition_producer>(mode, destination, info);\r
 178 }\r
 179 \r
 180 }}\r
 181 \r