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         unsigned int                            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<frame_producer>        org_dest_producer_;\r
  42         safe_ptr<frame_producer>        org_source_producer_;\r
  43 \r
  44         safe_ptr<basic_frame>           last_frame_;\r
  45                 \r
  46         explicit transition_producer(const video_mode::type& mode, const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  47                 : mode_(mode)\r
  48                 , current_frame_(0)\r
  49                 , info_(info)\r
  50                 , dest_producer_(dest)\r
  51                 , org_dest_producer_(dest)\r
  52                 , source_producer_(frame_producer::empty())\r
  53                 , org_source_producer_(frame_producer::empty())\r
  54                 , last_frame_(basic_frame::empty()){}\r
  55         \r
  56         // frame_producer\r
  57 \r
  58         virtual safe_ptr<frame_producer> get_following_producer() const\r
  59         {\r
  60                 return dest_producer_;\r
  61         }\r
  62         \r
  63         virtual void set_leading_producer(const safe_ptr<frame_producer>& producer)\r
  64         {\r
  65                 source_producer_         = producer;\r
  66                 org_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       = core::basic_frame::empty();\r
  75                 auto source     = core::basic_frame::empty();\r
  76 \r
  77                 tbb::parallel_invoke\r
  78                 (\r
  79                         [&]\r
  80                         {\r
  81                                 dest = receive_and_follow(dest_producer_, hints);\r
  82                                 if(dest == core::basic_frame::late())\r
  83                                         dest = dest_producer_->last_frame();\r
  84                         },\r
  85                         [&]\r
  86                         {\r
  87                                 source = receive_and_follow(source_producer_, hints);\r
  88                                 if(source == core::basic_frame::late())\r
  89                                         source = source_producer_->last_frame();\r
  90                         }\r
  91                 );\r
  92 \r
  93                 return last_frame_ = compose(dest, source);\r
  94         }\r
  95 \r
  96         virtual safe_ptr<core::basic_frame> last_frame() const\r
  97         {\r
  98                 return last_frame_;\r
  99         }\r
 100 \r
 101         virtual int64_t nb_frames() const \r
 102         {\r
 103                 return get_following_producer()->nb_frames();\r
 104         }\r
 105 \r
 106         virtual std::wstring print() const\r
 107         {\r
 108                 return L"transition[" + org_source_producer_->print() + L"|" + org_dest_producer_->print() + L"]";\r
 109         }\r
 110         \r
 111         // transition_producer\r
 112                                                 \r
 113         safe_ptr<basic_frame> compose(const safe_ptr<basic_frame>& dest_frame, const safe_ptr<basic_frame>& src_frame) \r
 114         {       \r
 115                 if(info_.type == transition::cut)               \r
 116                         return src_frame;\r
 117                                                                                 \r
 118                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, info_.duration*2);\r
 119                 const double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, info_.duration*2);  \r
 120 \r
 121                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;             \r
 122                 \r
 123                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
 124                 \r
 125                 auto s_frame1 = make_safe<basic_frame>(src_frame);\r
 126                 auto s_frame2 = make_safe<basic_frame>(src_frame);\r
 127 \r
 128                 s_frame1->get_audio_transform().set_has_audio(false);\r
 129                 s_frame2->get_audio_transform().set_gain(1.0-delta2);\r
 130 \r
 131                 auto d_frame1 = make_safe<basic_frame>(dest_frame);\r
 132                 auto d_frame2 = make_safe<basic_frame>(dest_frame);\r
 133                 \r
 134                 d_frame1->get_audio_transform().set_has_audio(false);\r
 135                 d_frame2->get_audio_transform().set_gain(delta2);\r
 136 \r
 137                 if(info_.type == transition::mix)\r
 138                 {\r
 139                         d_frame1->get_image_transform().set_opacity(delta1);    \r
 140                         d_frame2->get_image_transform().set_opacity(delta2);    \r
 141                 }\r
 142                 else if(info_.type == transition::slide)\r
 143                 {\r
 144                         d_frame1->get_image_transform().set_fill_translation((-1.0+delta1)*dir, 0.0);   \r
 145                         d_frame2->get_image_transform().set_fill_translation((-1.0+delta2)*dir, 0.0);           \r
 146                 }\r
 147                 else if(info_.type == transition::push)\r
 148                 {\r
 149                         d_frame1->get_image_transform().set_fill_translation((-1.0+delta1)*dir, 0.0);\r
 150                         d_frame2->get_image_transform().set_fill_translation((-1.0+delta2)*dir, 0.0);\r
 151 \r
 152                         s_frame1->get_image_transform().set_fill_translation((0.0+delta1)*dir, 0.0);    \r
 153                         s_frame2->get_image_transform().set_fill_translation((0.0+delta2)*dir, 0.0);            \r
 154                 }\r
 155                 else if(info_.type == transition::wipe)         \r
 156                 {\r
 157                         d_frame1->get_image_transform().set_clip_scale(delta1, 1.0);    \r
 158                         d_frame2->get_image_transform().set_clip_scale(delta2, 1.0);                    \r
 159                 }\r
 160                                 \r
 161                 const auto s_frame = s_frame1->get_image_transform() == s_frame2->get_image_transform() ? s_frame2 : basic_frame::interlace(s_frame1, s_frame2, mode_);\r
 162                 const auto d_frame = d_frame1->get_image_transform() == d_frame2->get_image_transform() ? d_frame2 : basic_frame::interlace(d_frame1, d_frame2, mode_);\r
 163                 \r
 164                 return basic_frame::combine(s_frame, d_frame);\r
 165         }\r
 166 };\r
 167 \r
 168 safe_ptr<frame_producer> create_transition_producer(const video_mode::type& mode, const safe_ptr<frame_producer>& destination, const transition_info& info)\r
 169 {\r
 170         return make_safe<transition_producer>(mode, destination, info);\r
 171 }\r
 172 \r
 173 }}\r
 174 \r