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