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, \r
  39                                         const frame_format_desc& format_desc) \r
  40                 : current_frame_(0), info_(info), format_desc_(format_desc), dest_producer_(dest)\r
  41         {\r
  42                 if(!dest)\r
  43                         BOOST_THROW_EXCEPTION(null_argument() << arg_name_info("dest"));\r
  44         }\r
  45                 \r
  46         frame_producer_ptr get_following_producer() const\r
  47         {\r
  48                 return dest_producer_;\r
  49         }\r
  50         \r
  51         void set_leading_producer(const frame_producer_ptr& producer)\r
  52         {\r
  53                 source_producer_ = producer;\r
  54         }\r
  55                 \r
  56         gpu_frame_ptr get_frame()\r
  57         {\r
  58                 if(++current_frame_ >= info_.duration)\r
  59                         return nullptr;\r
  60 \r
  61                 gpu_frame_ptr source;\r
  62                 gpu_frame_ptr dest;\r
  63 \r
  64                 tbb::parallel_invoke\r
  65                 (\r
  66                         [&]{dest = get_producer_frame(dest_producer_);},\r
  67                         [&]{source = get_producer_frame(source_producer_);}\r
  68                 );\r
  69 \r
  70                 return compose(dest, source);\r
  71         }\r
  72 \r
  73         gpu_frame_ptr get_producer_frame(frame_producer_ptr& producer)\r
  74         {\r
  75                 if(producer == nullptr)\r
  76                 {       \r
  77                         auto frame = factory_->create_frame(format_desc_);\r
  78                         common::clear(frame->data(), frame->size());\r
  79                         return frame;\r
  80                 }\r
  81 \r
  82                 gpu_frame_ptr frame;\r
  83                 try\r
  84                 {\r
  85                         frame = producer->get_frame();\r
  86                 }\r
  87                 catch(...)\r
  88                 {\r
  89                         CASPAR_LOG_CURRENT_EXCEPTION();\r
  90                         producer = nullptr;\r
  91                         CASPAR_LOG(warning) << "Removed renderer from transition.";\r
  92                 }\r
  93 \r
  94                 if(frame == nullptr && producer != nullptr && producer->get_following_producer() != nullptr)\r
  95                 {\r
  96                         auto following = producer->get_following_producer();\r
  97                         following->initialize(factory_);\r
  98                         following->set_leading_producer(producer);\r
  99                         producer = following;\r
 100                         return get_producer_frame(producer);\r
 101                 }\r
 102                 return frame;\r
 103         }\r
 104                         \r
 105         gpu_frame_ptr compose(const gpu_frame_ptr& dest_producer_frame, const gpu_frame_ptr& src_frame) \r
 106         {       \r
 107                 if(!src_frame)\r
 108                         return dest_producer_frame;\r
 109 \r
 110                 if(info_.type == transition_type::cut || !dest_producer_frame)          \r
 111                         return src_frame;\r
 112                 \r
 113                 int volume = static_cast<int>(static_cast<double>(current_frame_)/static_cast<double>(info_.duration)*256.0);\r
 114                                 \r
 115                 for(size_t n = 0; n < dest_producer_frame->audio_data().size(); ++n)\r
 116                         dest_producer_frame->audio_data()[n] = static_cast<short>((static_cast<int>(dest_producer_frame->audio_data()[n])*volume)>>8);\r
 117 \r
 118                 for(size_t n = 0; n < src_frame->audio_data().size(); ++n)\r
 119                         src_frame->audio_data()[n] = static_cast<short>((static_cast<int>(src_frame->audio_data()[n])*(256-volume))>>8);\r
 120                                 \r
 121                 float alpha = static_cast<float>(current_frame_)/static_cast<float>(info_.duration);\r
 122                 auto composite = std::make_shared<gpu_composite_frame>();\r
 123                 composite->add(src_frame);\r
 124                 composite->add(dest_producer_frame);\r
 125                 if(info_.type == transition_type::mix)\r
 126                         dest_producer_frame->alpha(alpha);              \r
 127                 else if(info_.type == transition_type::slide)\r
 128                 {\r
 129                         if(info_.direction == transition_direction::from_left)                  \r
 130                                 dest_producer_frame->translate(-1.0f+alpha, 0.0f);                      \r
 131                         else if(info_.direction == transition_direction::from_right)\r
 132                                 dest_producer_frame->translate(1.0f-alpha, 0.0f);                       \r
 133                 }\r
 134                 else if(info_.type == transition_type::push)\r
 135                 {\r
 136                         if(info_.direction == transition_direction::from_left)          \r
 137                         {\r
 138                                 dest_producer_frame->translate(-1.0f+alpha, 0.0f);\r
 139                                 src_frame->translate(0.0f+alpha, 0.0f);\r
 140                         }\r
 141                         else if(info_.direction == transition_direction::from_right)\r
 142                         {\r
 143                                 dest_producer_frame->translate(1.0f-alpha, 0.0f);\r
 144                                 src_frame->translate(0.0f-alpha, 0.0f);\r
 145                         }\r
 146                 }\r
 147                 else if(info_.type == transition_type::wipe)\r
 148                 {\r
 149                         if(info_.direction == transition_direction::from_left)          \r
 150                         {\r
 151                                 dest_producer_frame->translate(-1.0f+alpha, 0.0f);\r
 152                                 dest_producer_frame->texcoords(rectangle(-1.0+alpha, 1.0, alpha, 0.0));\r
 153                         }\r
 154                         else if(info_.direction == transition_direction::from_right)\r
 155                         {\r
 156                                 dest_producer_frame->translate(1.0f-alpha, 0.0f);\r
 157                                 dest_producer_frame->texcoords(rectangle(1.0-alpha, 1.0, 2.0-alpha, 0.0));\r
 158                         }\r
 159                 }\r
 160 \r
 161                 return composite;\r
 162         }\r
 163                 \r
 164         void initialize(const frame_factory_ptr& factory)\r
 165         {\r
 166                 dest_producer_->initialize(factory);\r
 167                 factory_ = factory;\r
 168         }\r
 169 \r
 170         const frame_format_desc         format_desc_;\r
 171 \r
 172         frame_producer_ptr                      source_producer_;\r
 173         frame_producer_ptr                      dest_producer_;\r
 174         \r
 175         unsigned short                          current_frame_;\r
 176         \r
 177         const transition_info           info_;\r
 178         frame_factory_ptr                       factory_;\r
 179 };\r
 180 \r
 181 transition_producer::transition_producer(const frame_producer_ptr& dest, const transition_info& info, const frame_format_desc& format_desc) \r
 182         : impl_(new implementation(dest, info, format_desc)){}\r
 183 gpu_frame_ptr transition_producer::get_frame(){return impl_->get_frame();}\r
 184 frame_producer_ptr transition_producer::get_following_producer() const{return impl_->get_following_producer();}\r
 185 void transition_producer::set_leading_producer(const frame_producer_ptr& producer) { impl_->set_leading_producer(producer); }\r
 186 const frame_format_desc& transition_producer::get_frame_format_desc() const { return impl_->format_desc_; } \r
 187 void transition_producer::initialize(const frame_factory_ptr& factory) { impl_->initialize(factory);}\r
 188 \r
 189 }}\r
 190 \r