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