git.sesse.net Git - casparcg/blob - core/producer/transition/transition_producer.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../../stdafx.h"\r
  23 \r
  24 #include "transition_producer.h"\r
  25 \r
  26 #include "../frame_producer.h"\r
  27 #include "../../frame/draw_frame.h"\r
  28 #include "../../frame/frame_transform.h"\r
  29 \r
  30 #include <tbb/parallel_invoke.h>\r
  31 \r
  32 namespace caspar { namespace core {     \r
  33 \r
  34 struct transition_producer : public frame_producer\r
  35 {       \r
  36         const field_mode                mode_;\r
  37         unsigned int                            current_frame_;\r
  38         \r
  39         const transition_info           info_;\r
  40         \r
  41         safe_ptr<frame_producer>        dest_producer_;\r
  42         safe_ptr<frame_producer>        source_producer_;\r
  43 \r
  44         safe_ptr<draw_frame>            last_frame_;\r
  45                 \r
  46         explicit transition_producer(const field_mode& 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                 , source_producer_(frame_producer::empty())\r
  52                 , last_frame_(draw_frame::empty()){}\r
  53         \r
  54         // frame_producer\r
  55 \r
  56         virtual safe_ptr<frame_producer> get_following_producer() const override\r
  57         {\r
  58                 return dest_producer_;\r
  59         }\r
  60         \r
  61         virtual void set_leading_producer(const safe_ptr<frame_producer>& producer) override\r
  62         {\r
  63                 source_producer_ = producer;\r
  64         }\r
  65 \r
  66         virtual safe_ptr<draw_frame> receive(int flags) override\r
  67         {\r
  68                 if(++current_frame_ >= info_.duration)\r
  69                         return draw_frame::eof();\r
  70                 \r
  71                 auto dest = draw_frame::empty();\r
  72                 auto source = draw_frame::empty();\r
  73 \r
  74                 tbb::parallel_invoke(\r
  75                 [&]\r
  76                 {\r
  77                         dest = receive_and_follow(dest_producer_, flags);\r
  78                         if(dest == core::draw_frame::late())\r
  79                                 dest = dest_producer_->last_frame();\r
  80                 },\r
  81                 [&]\r
  82                 {\r
  83                         source = receive_and_follow(source_producer_, flags);\r
  84                         if(source == core::draw_frame::late())\r
  85                                 source = source_producer_->last_frame();\r
  86                 });\r
  87 \r
  88                 return compose(dest, source);\r
  89         }\r
  90 \r
  91         virtual safe_ptr<core::draw_frame> last_frame() const override\r
  92         {\r
  93                 return last_frame_;\r
  94         }\r
  95 \r
  96         virtual uint32_t nb_frames() const override\r
  97         {\r
  98                 return get_following_producer()->nb_frames();\r
  99         }\r
 100 \r
 101         virtual std::wstring print() const override\r
 102         {\r
 103                 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";\r
 104         }\r
 105         \r
 106         boost::property_tree::wptree info() const override\r
 107         {\r
 108                 boost::property_tree::wptree info;\r
 109                 info.add(L"type", L"transition-producer");\r
 110                 info.add_child(L"source.producer",         source_producer_->info());\r
 111                 info.add_child(L"destination.producer", dest_producer_->info());\r
 112                 return info;\r
 113         }\r
 114 \r
 115         // transition_producer\r
 116                                                 \r
 117         safe_ptr<draw_frame> compose(const safe_ptr<draw_frame>& dest_frame, const safe_ptr<draw_frame>& src_frame) \r
 118         {       \r
 119                 if(info_.type == transition_type::cut)          \r
 120                         return src_frame;\r
 121                                                                                 \r
 122                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));\r
 123                 const double delta2 = info_.tweener(current_frame_*2,   0.0, 1.0, static_cast<double>(info_.duration*2));  \r
 124 \r
 125                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;             \r
 126                 \r
 127                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
 128                 \r
 129                 auto s_frame1 = make_safe<draw_frame>(src_frame);\r
 130                 auto s_frame2 = make_safe<draw_frame>(src_frame);\r
 131 \r
 132                 s_frame1->get_frame_transform().volume = 0.0;\r
 133                 s_frame2->get_frame_transform().volume = 1.0-delta2;\r
 134 \r
 135                 auto d_frame1 = make_safe<draw_frame>(dest_frame);\r
 136                 auto d_frame2 = make_safe<draw_frame>(dest_frame);\r
 137                 \r
 138                 d_frame1->get_frame_transform().volume = 0.0;\r
 139                 d_frame2->get_frame_transform().volume = delta2;\r
 140 \r
 141                 if(info_.type == transition_type::mix)\r
 142                 {\r
 143                         d_frame1->get_frame_transform().opacity = delta1;       \r
 144                         d_frame1->get_frame_transform().is_mix = true;\r
 145                         d_frame2->get_frame_transform().opacity = delta2;\r
 146                         d_frame2->get_frame_transform().is_mix = true;\r
 147 \r
 148                         s_frame1->get_frame_transform().opacity = 1.0-delta1;   \r
 149                         s_frame1->get_frame_transform().is_mix = true;\r
 150                         s_frame2->get_frame_transform().opacity = 1.0-delta2;   \r
 151                         s_frame2->get_frame_transform().is_mix = true;\r
 152                 }\r
 153                 if(info_.type == transition_type::slide)\r
 154                 {\r
 155                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;        \r
 156                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;                \r
 157                 }\r
 158                 else if(info_.type == transition_type::push)\r
 159                 {\r
 160                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;\r
 161                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;\r
 162 \r
 163                         s_frame1->get_frame_transform().fill_translation[0] = (0.0+delta1)*dir; \r
 164                         s_frame2->get_frame_transform().fill_translation[0] = (0.0+delta2)*dir;         \r
 165                 }\r
 166                 else if(info_.type == transition_type::wipe)            \r
 167                 {\r
 168                         d_frame1->get_frame_transform().clip_scale[0] = delta1; \r
 169                         d_frame2->get_frame_transform().clip_scale[0] = delta2;                 \r
 170                 }\r
 171                                 \r
 172                 const auto s_frame = s_frame1->get_frame_transform() == s_frame2->get_frame_transform() ? s_frame2 : draw_frame::interlace(s_frame1, s_frame2, mode_);\r
 173                 const auto d_frame = d_frame1->get_frame_transform() == d_frame2->get_frame_transform() ? d_frame2 : draw_frame::interlace(d_frame1, d_frame2, mode_);\r
 174                 \r
 175                 last_frame_ = draw_frame::over(s_frame2, d_frame2);\r
 176 \r
 177                 return draw_frame::over(s_frame, d_frame);\r
 178         }\r
 179 };\r
 180 \r
 181 safe_ptr<frame_producer> create_transition_producer(const field_mode& mode, const safe_ptr<frame_producer>& destination, const transition_info& info)\r
 182 {\r
 183         return create_producer_print_proxy(\r
 184                         make_safe<transition_producer>(mode, destination, info));\r
 185 }\r
 186 \r
 187 }}\r
 188 \r