git.sesse.net Git - casparcg/blob - core/mixer/mixer.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 "mixer.h"\r
  23 \r
  24 #include "read_frame.h"\r
  25 #include "write_frame.h"\r
  26 \r
  27 #include "audio/audio_mixer.h"\r
  28 #include "image/image_mixer.h"\r
  29 \r
  30 #include "../video_channel_context.h"\r
  31 \r
  32 #include <common/exception/exceptions.h>\r
  33 #include <common/concurrency/executor.h>\r
  34 #include <common/utility/tweener.h>\r
  35 \r
  36 #include <core/mixer/read_frame.h>\r
  37 #include <core/mixer/write_frame.h>\r
  38 #include <core/producer/frame/basic_frame.h>\r
  39 #include <core/producer/frame/frame_factory.h>\r
  40 #include <core/producer/frame/pixel_format.h>\r
  41 #include <core/producer/frame/audio_transform.h>\r
  42 #include <core/producer/frame/image_transform.h>\r
  43 \r
  44 #include <core/video_format.h>\r
  45 \r
  46 #include <boost/fusion/container/map.hpp>\r
  47 #include <boost/fusion/include/at_key.hpp>\r
  48 #include <boost/foreach.hpp>\r
  49 \r
  50 #include <tbb/parallel_invoke.h>\r
  51 \r
  52 #include <unordered_map>\r
  53 \r
  54 namespace caspar { namespace core {\r
  55                 \r
  56 template<typename T>\r
  57 class tweened_transform\r
  58 {\r
  59         T source_;\r
  60         T dest_;\r
  61         int duration_;\r
  62         int time_;\r
  63         tweener_t tweener_;\r
  64 public: \r
  65         tweened_transform()\r
  66                 : duration_(0)\r
  67                 , time_(0)\r
  68                 , tweener_(get_tweener(L"linear")){}\r
  69         tweened_transform(const T& source, const T& dest, int duration, const std::wstring& tween = L"linear")\r
  70                 : source_(source)\r
  71                 , dest_(dest)\r
  72                 , duration_(duration)\r
  73                 , time_(0)\r
  74                 , tweener_(get_tweener(tween)){}\r
  75         \r
  76         T fetch()\r
  77         {\r
  78                 return time_ == duration_ ? dest_ : tween(static_cast<double>(time_), source_, dest_, static_cast<double>(duration_), tweener_);\r
  79         }\r
  80 \r
  81         T fetch_and_tick(int num)\r
  82         {                                               \r
  83                 time_ = std::min(time_+num, duration_);\r
  84                 return fetch();\r
  85         }\r
  86 };\r
  87 \r
  88 struct mixer::implementation : boost::noncopyable\r
  89 {               \r
  90         video_channel_context& channel_;\r
  91         \r
  92         audio_mixer     audio_mixer_;\r
  93         image_mixer image_mixer_;\r
  94         \r
  95         typedef std::unordered_map<int, tweened_transform<core::image_transform>> image_transforms;\r
  96         typedef std::unordered_map<int, tweened_transform<core::audio_transform>> audio_transforms;\r
  97 \r
  98         boost::fusion::map<boost::fusion::pair<core::image_transform, image_transforms>,\r
  99                                         boost::fusion::pair<core::audio_transform, audio_transforms>> transforms_;\r
 100         \r
 101 public:\r
 102         implementation(video_channel_context& video_channel) \r
 103                 : channel_(video_channel)\r
 104                 , audio_mixer_(channel_.get_format_desc())\r
 105                 , image_mixer_(channel_)\r
 106         {       \r
 107                 CASPAR_LOG(info) << print() << L" Successfully initialized.";   \r
 108         }\r
 109                         \r
 110         safe_ptr<read_frame> execute(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 111         {                       \r
 112                 try\r
 113                 {\r
 114                         decltype(mix_image(frames)) image;\r
 115                         decltype(mix_audio(frames)) audio;\r
 116 \r
 117                         tbb::parallel_invoke(\r
 118                                         [&]{image = mix_image(frames);}, \r
 119                                         [&]{audio = mix_audio(frames);});\r
 120                         \r
 121                         return make_safe<read_frame>(channel_.ogl(), channel_.get_format_desc().size, std::move(image.get()), std::move(audio));\r
 122                 }\r
 123                 catch(...)\r
 124                 {\r
 125                         channel_.ogl().gc().wait();\r
 126                         image_mixer_ = image_mixer(channel_);\r
 127                         audio_mixer_ = audio_mixer(channel_.get_format_desc());\r
 128                         channel_.ogl().gc().wait();\r
 129 \r
 130                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 131                         return make_safe<read_frame>();\r
 132                 }\r
 133         }\r
 134                         \r
 135         safe_ptr<core::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 136         {               \r
 137                 return image_mixer_.create_frame(tag, desc);\r
 138         }\r
 139 \r
 140         void reset_transforms()\r
 141         {\r
 142                 channel_.execution().invoke([&]\r
 143                 {\r
 144                         boost::fusion::at_key<image_transform>(transforms_).clear();\r
 145                         boost::fusion::at_key<audio_transform>(transforms_).clear();\r
 146                 });\r
 147         }\r
 148                 \r
 149         template<typename T>\r
 150         void set_transform(int index, const T& transform, unsigned int mix_duration, const std::wstring& tween)\r
 151         {\r
 152                 channel_.execution().invoke([&]\r
 153                 {\r
 154                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 155 \r
 156                         auto src = transforms[index].fetch();\r
 157                         auto dst = transform;\r
 158                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 159                 });\r
 160         }\r
 161                                 \r
 162         template<typename T>\r
 163         void apply_transform(int index, const std::function<T(T)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
 164         {\r
 165                 channel_.execution().invoke([&]\r
 166                 {\r
 167                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 168 \r
 169                         auto src = transforms[index].fetch();\r
 170                         auto dst = transform(src);\r
 171                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 172                 });\r
 173         }\r
 174                 \r
 175         std::wstring print() const\r
 176         {\r
 177                 return L"mixer";\r
 178         }\r
 179 \r
 180 private:\r
 181                 \r
 182         boost::unique_future<safe_ptr<host_buffer>> mix_image(std::map<int, safe_ptr<core::basic_frame>> frames)\r
 183         {               \r
 184                 auto& image_transforms = boost::fusion::at_key<core::image_transform>(transforms_);\r
 185                 \r
 186                 BOOST_FOREACH(auto& frame, frames)\r
 187                 {\r
 188                         image_mixer_.begin_layer();\r
 189 \r
 190                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 191                         frame1->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 192                                                 \r
 193                         if(channel_.get_format_desc().mode != core::video_mode::progressive)\r
 194                         {\r
 195                                 auto frame2 = make_safe<core::basic_frame>(frame.second);\r
 196                                 frame2->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 197                                 if(frame1->get_image_transform() != frame2->get_image_transform())\r
 198                                         frame1 = core::basic_frame::interlace(frame1, frame2, channel_.get_format_desc().mode);\r
 199                         }\r
 200 \r
 201                         frame1->accept(image_mixer_);\r
 202 \r
 203                         image_mixer_.end_layer();\r
 204                 }\r
 205 \r
 206                 return image_mixer_.render();\r
 207         }\r
 208 \r
 209         std::vector<int16_t> mix_audio(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 210         {\r
 211                 auto& audio_transforms = boost::fusion::at_key<core::audio_transform>(transforms_);\r
 212 \r
 213                 BOOST_FOREACH(auto& frame, frames)\r
 214                 {\r
 215                         const unsigned int num = channel_.get_format_desc().mode == core::video_mode::progressive ? 1 : 2;\r
 216 \r
 217                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 218                         frame1->get_audio_transform() = audio_transforms[frame.first].fetch_and_tick(num);\r
 219                         frame1->accept(audio_mixer_);\r
 220                 }\r
 221 \r
 222                 return audio_mixer_.mix();\r
 223         }\r
 224 };\r
 225         \r
 226 mixer::mixer(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 227 safe_ptr<core::read_frame> mixer::execute(const std::map<int, safe_ptr<core::basic_frame>>& frames){ return impl_->execute(frames);}\r
 228 core::video_format_desc mixer::get_video_format_desc() const { return impl_->channel_.get_format_desc(); }\r
 229 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){ return impl_->create_frame(tag, desc); }         \r
 230 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, size_t width, size_t height, core::pixel_format::type pix_fmt)\r
 231 {\r
 232         // Create bgra frame\r
 233         core::pixel_format_desc desc;\r
 234         desc.pix_fmt = pix_fmt;\r
 235         desc.planes.push_back( core::pixel_format_desc::plane(width, height, 4));\r
 236         return create_frame(tag, desc);\r
 237 }\r
 238 void mixer::reset_transforms(){impl_->reset_transforms();}\r
 239 void mixer::set_image_transform(int index, const core::image_transform& transform, unsigned int mix_duration, const std::wstring& tween){impl_->set_transform<core::image_transform>(index, transform, mix_duration, tween);}\r
 240 void mixer::set_audio_transform(int index, const core::audio_transform& transform, unsigned int mix_duration, const std::wstring& tween){impl_->set_transform<core::audio_transform>(index, transform, mix_duration, tween);}\r
 241 void mixer::apply_image_transform(int index, const std::function<core::image_transform(core::image_transform)>& transform, unsigned int mix_duration, const std::wstring& tween){impl_->apply_transform<core::image_transform>(index, transform, mix_duration, tween);}\r
 242 void mixer::apply_audio_transform(int index, const std::function<core::audio_transform(core::audio_transform)>& transform, unsigned int mix_duration, const std::wstring& tween){impl_->apply_transform<core::audio_transform>(index, transform, mix_duration, tween);}\r
 243 \r
 244 }}