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

   1 /*\r
   2 * copyright (c) 2010 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 *  This file is part of CasparCG.\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 */ \r
  20 #include "../../stdafx.h"\r
  21 \r
  22 #include "transition_producer.h"\r
  23 \r
  24 #include "../../frame/frame_format.h"\r
  25 #include "../../frame/gpu_frame.h"\r
  26 #include "../../frame/gpu_composite_frame.h"\r
  27 #include "../../frame/frame_factory.h"\r
  28 \r
  29 #include "../../../common/utility/memory.h"\r
  30 #include "../../renderer/render_device.h"\r
  31 \r
  32 #include <boost/range/algorithm/copy.hpp>\r
  33 \r
  34 namespace caspar { namespace core {     \r
  35 \r
  36 struct transition_producer::implementation : boost::noncopyable\r
  37 {\r
  38         implementation(const frame_producer_ptr& dest, const transition_info& info, const frame_format_desc& format_desc) \r
  39                 : current_frame_(0), info_(info), format_desc_(format_desc), dest_producer_(dest)\r
  40         {\r
  41                 if(!dest)\r
  42                         BOOST_THROW_EXCEPTION(null_argument() << arg_name_info("dest"));\r
  43         }\r
  44                 \r
  45         frame_producer_ptr get_following_producer() const\r
  46         {\r
  47                 return dest_producer_;\r
  48         }\r
  49         \r
  50         void set_leading_producer(const frame_producer_ptr& producer)\r
  51         {\r
  52                 source_producer_ = producer;\r
  53         }\r
  54                 \r
  55         gpu_frame_ptr get_frame()\r
  56         {\r
  57                 if(current_frame_++ >= info_.duration)\r
  58                         return nullptr;\r
  59 \r
  60                 gpu_frame_ptr source;\r
  61                 gpu_frame_ptr dest;\r
  62 \r
  63                 tbb::parallel_invoke\r
  64                 (\r
  65                         [&]{dest = get_frame(dest_producer_);},\r
  66                         [&]{source = get_frame(source_producer_);}\r
  67                 );\r
  68 \r
  69                 return compose(dest, source);\r
  70         }\r
  71 \r
  72         gpu_frame_ptr get_frame(frame_producer_ptr& producer)\r
  73         {\r
  74                 if(producer == nullptr)\r
  75                         return nullptr;\r
  76 \r
  77                 gpu_frame_ptr frame;\r
  78                 try\r
  79                 {\r
  80                         frame = producer->get_frame();\r
  81                 }\r
  82                 catch(...)\r
  83                 {\r
  84                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  85                         producer = nullptr;\r
  86                         CASPAR_LOG(warning) << "Removed renderer from transition.";\r
  87                 }\r
  88 \r
  89                 if(frame == nullptr && producer != nullptr && \r
  90                         producer->get_following_producer() != nullptr)\r
  91                 {\r
  92                         auto following = producer->get_following_producer();\r
  93                         following->initialize(factory_);\r
  94                         following->set_leading_producer(producer);\r
  95                         producer = following;\r
  96                         return get_frame(producer);\r
  97                 }\r
  98                 return frame;\r
  99         }\r
 100                         \r
 101         void set_volume(const gpu_frame_ptr& frame, int volume)\r
 102         {\r
 103                 if(!frame)\r
 104                         return;\r
 105 \r
 106                 for(size_t n = 0; n < frame->audio_data().size(); ++n)\r
 107                         frame->audio_data()[n] = static_cast<short>((static_cast<int>(frame->audio_data()[n])*volume)>>8);\r
 108         }\r
 109                 \r
 110         gpu_frame_ptr compose(const gpu_frame_ptr& dest_frame, gpu_frame_ptr src_frame) \r
 111         {       \r
 112                 if(info_.type == transition_type::cut)          \r
 113                         return src_frame;\r
 114 \r
 115                 if(!dest_frame)\r
 116                         return nullptr;\r
 117                                                                 \r
 118                 double alpha = static_cast<double>(current_frame_)/static_cast<double>(info_.duration);\r
 119                 int volume = static_cast<int>(static_cast<double>(current_frame_)/static_cast<double>(info_.duration)*256.0);\r
 120                                 \r
 121                 tbb::parallel_invoke\r
 122                 (\r
 123                         [&]{set_volume(dest_frame, volume);},\r
 124                         [&]{set_volume(src_frame, 256-volume);}\r
 125                 );\r
 126                 \r
 127                 if(info_.type == transition_type::mix)\r
 128                         dest_frame->alpha(alpha);               \r
 129                 else if(info_.type == transition_type::slide)\r
 130                 {       \r
 131                         if(info_.direction == transition_direction::from_left)                  \r
 132                                 dest_frame->translate(-1.0+alpha, 0.0);                 \r
 133                         else if(info_.direction == transition_direction::from_right)\r
 134                                 dest_frame->translate(1.0-alpha, 0.0);          \r
 135                 }\r
 136                 else if(info_.type == transition_type::push)\r
 137                 {\r
 138                         if(info_.direction == transition_direction::from_left)          \r
 139                         {\r
 140                                 dest_frame->translate(-1.0+alpha, 0.0);\r
 141                                 if(src_frame)\r
 142                                         src_frame->translate(0.0+alpha, 0.0);\r
 143                         }\r
 144                         else if(info_.direction == transition_direction::from_right)\r
 145                         {\r
 146                                 dest_frame->translate(1.0-alpha, 0.0);\r
 147                                 if(src_frame)\r
 148                                         src_frame->translate(0.0-alpha, 0.0);\r
 149                         }\r
 150                 }\r
 151                 else if(info_.type == transition_type::wipe)\r
 152                 {\r
 153                         if(info_.direction == transition_direction::from_left)          \r
 154                         {\r
 155                                 dest_frame->translate(-1.0+alpha, 0.0);\r
 156                                 dest_frame->texcoords(rectangle(-1.0+alpha, 1.0, alpha, 0.0));\r
 157                         }\r
 158                         else if(info_.direction == transition_direction::from_right)\r
 159                         {\r
 160                                 dest_frame->translate(1.0-alpha, 0.0);\r
 161                                 dest_frame->texcoords(rectangle(1.0-alpha, 1.0, 2.0-alpha, 0.0));\r
 162                         }\r
 163                 }\r
 164                                                 \r
 165                 auto composite = std::make_shared<gpu_composite_frame>();\r
 166                 if(src_frame)\r
 167                         composite->add(src_frame);\r
 168                 composite->add(dest_frame);\r
 169                 return composite;\r
 170         }\r
 171                 \r
 172         void initialize(const frame_factory_ptr& factory)\r
 173         {\r
 174                 dest_producer_->initialize(factory);\r
 175                 factory_ = factory;\r
 176         }\r
 177 \r
 178         const frame_format_desc         format_desc_;\r
 179 \r
 180         frame_producer_ptr                      source_producer_;\r
 181         frame_producer_ptr                      dest_producer_;\r
 182         \r
 183         unsigned short                          current_frame_;\r
 184         \r
 185         const transition_info           info_;\r
 186         frame_factory_ptr                       factory_;\r
 187 };\r
 188 \r
 189 transition_producer::transition_producer(const frame_producer_ptr& dest, const transition_info& info, const frame_format_desc& format_desc) \r
 190         : impl_(new implementation(dest, info, format_desc)){}\r
 191 gpu_frame_ptr transition_producer::get_frame(){return impl_->get_frame();}\r
 192 frame_producer_ptr transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 193 void transition_producer::set_leading_producer(const frame_producer_ptr& producer) { impl_->set_leading_producer(producer); }\r
 194 const frame_format_desc& transition_producer::get_frame_format_desc() const { return impl_->format_desc_; } \r
 195 void transition_producer::initialize(const frame_factory_ptr& factory) { impl_->initialize(factory);}\r
 196 \r
 197 }}\r
 198 \r