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