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 <core/video_format.h>\r
  27 \r
  28 #include <core/producer/frame/basic_frame.h>\r
  29 #include <core/producer/frame/frame_transform.h>\r
  30 \r
  31 #include <tbb/parallel_invoke.h>\r
  32 \r
  33 #include <boost/assign.hpp>\r
  34 \r
  35 using namespace boost::assign;\r
  36 \r
  37 namespace caspar { namespace core {     \r
  38 \r
  39 struct transition_producer : public frame_producer\r
  40 {       \r
  41         const field_mode::type          mode_;\r
  42         unsigned int                            current_frame_;\r
  43         \r
  44         const transition_info           info_;\r
  45         \r
  46         safe_ptr<frame_producer>        dest_producer_;\r
  47         safe_ptr<frame_producer>        source_producer_;\r
  48 \r
  49         safe_ptr<basic_frame>           last_frame_;\r
  50                 \r
  51         explicit transition_producer(const field_mode::type& mode, const safe_ptr<frame_producer>& dest, const transition_info& info) \r
  52                 : mode_(mode)\r
  53                 , current_frame_(0)\r
  54                 , info_(info)\r
  55                 , dest_producer_(dest)\r
  56                 , source_producer_(frame_producer::empty())\r
  57                 , last_frame_(basic_frame::empty()){}\r
  58         \r
  59         // frame_producer\r
  60 \r
  61         virtual safe_ptr<frame_producer> get_following_producer() const override\r
  62         {\r
  63                 return dest_producer_;\r
  64         }\r
  65         \r
  66         virtual void set_leading_producer(const safe_ptr<frame_producer>& producer) override\r
  67         {\r
  68                 source_producer_ = producer;\r
  69         }\r
  70 \r
  71         virtual safe_ptr<basic_frame> receive(int hints) override\r
  72         {\r
  73                 if(++current_frame_ >= info_.duration)\r
  74                         return basic_frame::eof();\r
  75                 \r
  76                 auto dest = basic_frame::empty();\r
  77                 auto source = basic_frame::empty();\r
  78 \r
  79                 tbb::parallel_invoke(\r
  80                 [&]\r
  81                 {\r
  82                         dest = receive_and_follow(dest_producer_, hints);\r
  83                         if(dest == core::basic_frame::late())\r
  84                                 dest = dest_producer_->last_frame();\r
  85                 },\r
  86                 [&]\r
  87                 {\r
  88                         source = receive_and_follow(source_producer_, hints);\r
  89                         if(source == core::basic_frame::late())\r
  90                                 source = source_producer_->last_frame();\r
  91                 });\r
  92 \r
  93                 return compose(dest, source);\r
  94         }\r
  95 \r
  96         virtual safe_ptr<core::basic_frame> last_frame() const override\r
  97         {\r
  98                 return disable_audio(last_frame_);\r
  99         }\r
 100 \r
 101         virtual int64_t nb_frames() const override\r
 102         {\r
 103                 return get_following_producer()->nb_frames();\r
 104         }\r
 105 \r
 106         virtual std::wstring print() const override\r
 107         {\r
 108                 return L"transition[" + source_producer_->print() + L"|" + dest_producer_->print() + L"]";\r
 109         }\r
 110         \r
 111         boost::property_tree::wptree info() const override\r
 112         {\r
 113                 boost::property_tree::wptree info;\r
 114                 info.add(L"type", L"transition-producer");\r
 115                 info.add_child(L"source.producer",         source_producer_->info());\r
 116                 info.add_child(L"destination.producer", dest_producer_->info());\r
 117                 return info;\r
 118         }\r
 119 \r
 120         // transition_producer\r
 121                                                 \r
 122         safe_ptr<basic_frame> compose(const safe_ptr<basic_frame>& dest_frame, const safe_ptr<basic_frame>& src_frame) \r
 123         {       \r
 124                 if(info_.type == transition::cut)               \r
 125                         return src_frame;\r
 126                                                                                 \r
 127                 const double delta1 = info_.tweener(current_frame_*2-1, 0.0, 1.0, info_.duration*2);\r
 128                 const double delta2 = info_.tweener(current_frame_*2, 0.0, 1.0, info_.duration*2);  \r
 129 \r
 130                 const double dir = info_.direction == transition_direction::from_left ? 1.0 : -1.0;             \r
 131                 \r
 132                 // For interlaced transitions. Seperate fields into seperate frames which are transitioned accordingly.\r
 133                 \r
 134                 auto s_frame1 = make_safe<basic_frame>(src_frame);\r
 135                 auto s_frame2 = make_safe<basic_frame>(src_frame);\r
 136 \r
 137                 s_frame1->get_frame_transform().volume = 0.0;\r
 138                 s_frame2->get_frame_transform().volume = 1.0-delta2;\r
 139 \r
 140                 auto d_frame1 = make_safe<basic_frame>(dest_frame);\r
 141                 auto d_frame2 = make_safe<basic_frame>(dest_frame);\r
 142                 \r
 143                 d_frame1->get_frame_transform().volume = 0.0;\r
 144                 d_frame2->get_frame_transform().volume = delta2;\r
 145 \r
 146                 if(info_.type == transition::mix)\r
 147                 {\r
 148                         d_frame1->get_frame_transform().opacity = delta1;       \r
 149                         d_frame1->get_frame_transform().is_mix = true;\r
 150                         d_frame2->get_frame_transform().opacity = delta2;\r
 151                         d_frame2->get_frame_transform().is_mix = true;\r
 152 \r
 153                         s_frame1->get_frame_transform().opacity = 1.0-delta1;   \r
 154                         s_frame1->get_frame_transform().is_mix = true;\r
 155                         s_frame2->get_frame_transform().opacity = 1.0-delta2;   \r
 156                         s_frame2->get_frame_transform().is_mix = true;\r
 157                 }\r
 158                 if(info_.type == transition::slide)\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                 else if(info_.type == transition::push)\r
 164                 {\r
 165                         d_frame1->get_frame_transform().fill_translation[0] = (-1.0+delta1)*dir;\r
 166                         d_frame2->get_frame_transform().fill_translation[0] = (-1.0+delta2)*dir;\r
 167 \r
 168                         s_frame1->get_frame_transform().fill_translation[0] = (0.0+delta1)*dir; \r
 169                         s_frame2->get_frame_transform().fill_translation[0] = (0.0+delta2)*dir;         \r
 170                 }\r
 171                 else if(info_.type == transition::wipe)         \r
 172                 {\r
 173                         d_frame1->get_frame_transform().clip_scale[0] = delta1; \r
 174                         d_frame2->get_frame_transform().clip_scale[0] = delta2;                 \r
 175                 }\r
 176                                 \r
 177                 const auto s_frame = s_frame1->get_frame_transform() == s_frame2->get_frame_transform() ? s_frame2 : basic_frame::interlace(s_frame1, s_frame2, mode_);\r
 178                 const auto d_frame = d_frame1->get_frame_transform() == d_frame2->get_frame_transform() ? d_frame2 : basic_frame::interlace(d_frame1, d_frame2, mode_);\r
 179                 \r
 180                 last_frame_ = basic_frame::combine(s_frame2, d_frame2);\r
 181 \r
 182                 return basic_frame::combine(s_frame, d_frame);\r
 183         }\r
 184 };\r
 185 \r
 186 safe_ptr<frame_producer> create_transition_producer(const field_mode::type& mode, const safe_ptr<frame_producer>& destination, const transition_info& info)\r
 187 {\r
 188         return make_safe<transition_producer>(mode, destination, info);\r
 189 }\r
 190 \r
 191 }}\r
 192 \r