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 : public frame_producer\r
  33 {       \r
  34         const video_format_desc         format_desc_;\r
  35         uint32_t                                        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         transition_producer(const video_format_desc& format_desc, const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  43                 : format_desc_(format_desc)\r
  44                 , current_frame_(0)\r
  45                 , info_(info)\r
  46                 , dest_producer_(dest)\r
  47                 , source_producer_(frame_producer::empty()){}\r
  48                                         \r
  49         safe_ptr<frame_producer> get_following_producer() const\r
  50         {\r
  51                 return dest_producer_;\r
  52         }\r
  53         \r
  54         void set_leading_producer(const safe_ptr<frame_producer>& producer)\r
  55         {\r
  56                 source_producer_ = producer;\r
  57         }\r
  58 \r
  59         safe_ptr<basic_frame> receive()\r
  60         {\r
  61                 if(current_frame_++ >= info_.duration)\r
  62                         return basic_frame::eof();\r
  63 \r
  64                 auto source = basic_frame::empty();\r
  65                 auto dest = basic_frame::empty();\r
  66 \r
  67                 tbb::parallel_invoke\r
  68                 (\r
  69                         [&]{dest   = receive_and_follow(dest_producer_);},\r
  70                         [&]{source = receive_and_follow(source_producer_);}\r
  71                 );\r
  72 \r
  73                 return compose(dest, source);\r
  74         }\r
  75                                                 \r
  76         safe_ptr<basic_frame> compose(const safe_ptr<basic_frame>& dest_frame, const safe_ptr<basic_frame>& src_frame) \r
  77         {       \r
  78                 if(dest_frame == basic_frame::eof() && src_frame == basic_frame::eof())\r
  79                         return basic_frame::eof();\r
  80 \r
  81                 if(info_.type == transition::cut)               \r
  82                         return src_frame;\r
  83                                                                                 \r
  84                 double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, info_.duration*2);\r
  85                 double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, info_.duration*2);  \r
  86 \r
  87                 double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;           \r
  88                 \r
  89                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
  90                 \r
  91                 auto s_frame1 = make_safe<basic_frame>(src_frame);\r
  92                 auto s_frame2 = make_safe<basic_frame>(src_frame);\r
  93 \r
  94                 s_frame1->get_audio_transform().set_has_audio(false);\r
  95                 s_frame2->get_audio_transform().set_gain(1.0-delta2);\r
  96 \r
  97                 auto d_frame1 = make_safe<basic_frame>(dest_frame);\r
  98                 auto d_frame2 = make_safe<basic_frame>(dest_frame);\r
  99                 \r
 100                 d_frame1->get_audio_transform().set_has_audio(false);\r
 101                 d_frame2->get_audio_transform().set_gain(delta2);\r
 102 \r
 103                 if(info_.type == transition::mix)\r
 104                 {\r
 105                         d_frame1->get_image_transform().set_opacity(delta1);    \r
 106                         d_frame2->get_image_transform().set_opacity(delta2);    \r
 107                 }\r
 108                 else if(info_.type == transition::slide)\r
 109                 {\r
 110                         d_frame1->get_image_transform().set_fill_translation((-1.0+delta1)*dir, 0.0);   \r
 111                         d_frame2->get_image_transform().set_fill_translation((-1.0+delta2)*dir, 0.0);           \r
 112                 }\r
 113                 else if(info_.type == transition::push)\r
 114                 {\r
 115                         d_frame1->get_image_transform().set_fill_translation((-1.0+delta1)*dir, 0.0);\r
 116                         d_frame2->get_image_transform().set_fill_translation((-1.0+delta2)*dir, 0.0);\r
 117 \r
 118                         s_frame1->get_image_transform().set_fill_translation((0.0+delta1)*dir, 0.0);    \r
 119                         s_frame2->get_image_transform().set_fill_translation((0.0+delta2)*dir, 0.0);            \r
 120                 }\r
 121                 else if(info_.type == transition::wipe)         \r
 122                 {\r
 123                         d_frame1->get_image_transform().set_key_scale(delta1, 1.0);     \r
 124                         d_frame2->get_image_transform().set_key_scale(delta2, 1.0);                     \r
 125                 }\r
 126                 \r
 127                 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
 128                 auto d_frame = basic_frame::interlace(d_frame1, d_frame2, format_desc_.mode);\r
 129 \r
 130                 return basic_frame(s_frame, d_frame);\r
 131         }\r
 132 \r
 133         std::wstring print() const\r
 134         {\r
 135                 return L"transition";\r
 136         }\r
 137 };\r
 138 \r
 139 safe_ptr<frame_producer> create_transition_producer(const video_format_desc& format_desc, const safe_ptr<frame_producer>& destination, const transition_info& info)\r
 140 {\r
 141         return make_safe<transition_producer>(format_desc, destination, info);\r
 142 }\r
 143 \r
 144 }}\r
 145 \r