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 #include "../../monitor/monitor.h"\r
  30 \r
  31 #include <tbb/parallel_invoke.h>\r
  32 \r
  33 namespace caspar { namespace core {     \r
  34 \r
  35 struct transition_producer : public frame_producer\r
  36 {       \r
  37         spl::shared_ptr<monitor::subject>       event_subject_;\r
  38         const field_mode                                        mode_;\r
  39         int                                                                     current_frame_;\r
  40         \r
  41         const transition_info                           info_;\r
  42         \r
  43         spl::shared_ptr<frame_producer>         dest_producer_;\r
  44         spl::shared_ptr<frame_producer>         source_producer_;\r
  45 \r
  46         spl::shared_ptr<draw_frame>                     last_frame_;\r
  47                 \r
  48         explicit transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& dest, const transition_info& info) \r
  49                 : mode_(mode)\r
  50                 , current_frame_(0)\r
  51                 , info_(info)\r
  52                 , dest_producer_(dest)\r
  53                 , source_producer_(frame_producer::empty())\r
  54                 , last_frame_(draw_frame::empty())\r
  55         {\r
  56                 dest->subscribe(event_subject_);\r
  57         }\r
  58         \r
  59         // frame_producer\r
  60 \r
  61         virtual spl::shared_ptr<frame_producer> following_producer() const override\r
  62         {\r
  63                 return dest_producer_;\r
  64         }\r
  65         \r
  66         virtual void leading_producer(const spl::shared_ptr<frame_producer>& producer) override\r
  67         {\r
  68                 source_producer_ = producer;\r
  69         }\r
  70 \r
  71         virtual spl::shared_ptr<draw_frame> receive(int flags) override\r
  72         {\r
  73                 if(++current_frame_ >= info_.duration)\r
  74                         return draw_frame::eof();\r
  75                 \r
  76                 *event_subject_ << monitor::event("transition/frame") % current_frame_ % info_.duration\r
  77                                                 << monitor::event("transition/type") % [&]() -> std::string\r
  78                                                                                                                                 {\r
  79                                                                                                                                         switch(info_.type.value())\r
  80                                                                                                                                         {\r
  81                                                                                                                                         case transition_type::mix:              return "mix";\r
  82                                                                                                                                         case transition_type::wipe:             return "wipe";\r
  83                                                                                                                                         case transition_type::slide:    return "slide";\r
  84                                                                                                                                         case transition_type::push:             return "push";\r
  85                                                                                                                                         case transition_type::cut:              return "cut";\r
  86                                                                                                                                         default:                                                return "n/a";\r
  87                                                                                                                                         }\r
  88                                                                                                                                 }();\r
  89 \r
  90                 auto dest = draw_frame::empty();\r
  91                 auto source = draw_frame::empty();\r
  92 \r
  93                 tbb::parallel_invoke(\r
  94                 [&]\r
  95                 {\r
  96                         dest = dest_producer_->receive(flags);\r
  97                         if(dest == core::draw_frame::late())\r
  98                                 dest = dest_producer_->last_frame();\r
  99                 },\r
 100                 [&]\r
 101                 {\r
 102                         source = source_producer_->receive(flags);\r
 103                         if(source == core::draw_frame::late())\r
 104                                 source = source_producer_->last_frame();\r
 105                 });             \r
 106 \r
 107                 return compose(dest, source);\r
 108         }\r
 109 \r
 110         virtual spl::shared_ptr<core::draw_frame> last_frame() const override\r
 111         {\r
 112                 return last_frame_;\r
 113         }\r
 114 \r
 115         virtual uint32_t nb_frames() const override\r
 116         {\r
 117                 return following_producer()->nb_frames();\r
 118         }\r
 119 \r
 120         virtual std::wstring print() const override\r
 121         {\r
 122                 return L"transition[" + source_producer_->print() + L"=>" + dest_producer_->print() + L"]";\r
 123         }\r
 124 \r
 125         virtual std::wstring name() const override\r
 126         {\r
 127                 return L"transition";\r
 128         }\r
 129         \r
 130         boost::property_tree::wptree info() const override\r
 131         {\r
 132                 return dest_producer_->info();\r
 133         }\r
 134 \r
 135         // transition_producer\r
 136                                                 \r
 137         spl::shared_ptr<draw_frame> compose(const spl::shared_ptr<draw_frame>& dest_frame, const spl::shared_ptr<draw_frame>& src_frame) \r
 138         {       \r
 139                 if(info_.type == transition_type::cut)          \r
 140                         return src_frame;\r
 141                                                                                 \r
 142                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, static_cast<double>(info_.duration*2));\r
 143                 const double delta2 = info_.tweener(current_frame_*2,   0.0, 1.0, static_cast<double>(info_.duration*2));  \r
 144 \r
 145                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;             \r
 146                 \r
 147                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
 148                 \r
 149                 src_frame->get_frame_transform().volume = 1.0-delta2;\r
 150                 auto s_frame1 = spl::make_shared<draw_frame>(src_frame);\r
 151                 auto s_frame2 = spl::make_shared<draw_frame>(src_frame);\r
 152                 \r
 153                 dest_frame->get_frame_transform().volume = delta2;\r
 154                 auto d_frame1 = spl::make_shared<draw_frame>(dest_frame);\r
 155                 auto d_frame2 = spl::make_shared<draw_frame>(dest_frame);\r
 156                 \r
 157                 if(info_.type == transition_type::mix)\r
 158                 {\r
 159                         d_frame1->get_frame_transform().opacity = delta1;       \r
 160                         d_frame1->get_frame_transform().is_mix = true;\r
 161                         d_frame2->get_frame_transform().opacity = delta2;\r
 162                         d_frame2->get_frame_transform().is_mix = true;\r
 163 \r
 164                         s_frame1->get_frame_transform().opacity = 1.0-delta1;   \r
 165                         s_frame1->get_frame_transform().is_mix = true;\r
 166                         s_frame2->get_frame_transform().opacity = 1.0-delta2;   \r
 167                         s_frame2->get_frame_transform().is_mix = true;\r
 168                 }\r
 169                 if(info_.type == transition_type::slide)\r
 170                 {\r
 171                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;        \r
 172                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;                \r
 173                 }\r
 174                 else if(info_.type == transition_type::push)\r
 175                 {\r
 176                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;\r
 177                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;\r
 178 \r
 179                         s_frame1->get_frame_transform().fill_translation[0] = (0.0+delta1)*dir; \r
 180                         s_frame2->get_frame_transform().fill_translation[0] = (0.0+delta2)*dir;         \r
 181                 }\r
 182                 else if(info_.type == transition_type::wipe)            \r
 183                 {\r
 184                         d_frame1->get_frame_transform().clip_scale[0] = delta1; \r
 185                         d_frame2->get_frame_transform().clip_scale[0] = delta2;                 \r
 186                 }\r
 187                                 \r
 188                 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
 189                 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
 190                 \r
 191                 last_frame_ = draw_frame::over(s_frame2, d_frame2);\r
 192 \r
 193                 return draw_frame::over(s_frame, d_frame);\r
 194         }\r
 195 \r
 196         virtual void subscribe(const monitor::observable::observer_ptr& o) override                                                                                                                     \r
 197         {\r
 198                 return event_subject_->subscribe(o);\r
 199         }\r
 200 \r
 201         virtual void unsubscribe(const monitor::observable::observer_ptr& o) override           \r
 202         {\r
 203                 return event_subject_->unsubscribe(o);\r
 204         }\r
 205 };\r
 206 \r
 207 spl::shared_ptr<frame_producer> create_transition_producer(const field_mode& mode, const spl::shared_ptr<frame_producer>& destination, const transition_info& info)\r
 208 {\r
 209         return core::wrap_producer(spl::make_shared<transition_producer>(mode, destination, info));\r
 210 }\r
 211 \r
 212 }}\r
 213 \r