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 #include <common/env.h>\r
  36 \r
  37 #include <core/mixer/read_frame.h>\r
  38 #include <core/mixer/write_frame.h>\r
  39 #include <core/producer/frame/basic_frame.h>\r
  40 #include <core/producer/frame/frame_factory.h>\r
  41 #include <core/producer/frame/pixel_format.h>\r
  42 #include <core/producer/frame/audio_transform.h>\r
  43 #include <core/producer/frame/image_transform.h>\r
  44 \r
  45 #include <core/video_format.h>\r
  46 \r
  47 #include <boost/fusion/container/map.hpp>\r
  48 #include <boost/fusion/include/at_key.hpp>\r
  49 #include <boost/foreach.hpp>\r
  50 \r
  51 #include <tbb/parallel_invoke.h>\r
  52 \r
  53 #include <unordered_map>\r
  54 \r
  55 namespace caspar { namespace core {\r
  56                 \r
  57 template<typename T>\r
  58 class tweened_transform\r
  59 {\r
  60         T source_;\r
  61         T dest_;\r
  62         int duration_;\r
  63         int time_;\r
  64         tweener_t tweener_;\r
  65 public: \r
  66         tweened_transform()\r
  67                 : duration_(0)\r
  68                 , time_(0)\r
  69                 , tweener_(get_tweener(L"linear")){}\r
  70         tweened_transform(const T& source, const T& dest, int duration, const std::wstring& tween = L"linear")\r
  71                 : source_(source)\r
  72                 , dest_(dest)\r
  73                 , duration_(duration)\r
  74                 , time_(0)\r
  75                 , tweener_(get_tweener(tween)){}\r
  76         \r
  77         T fetch()\r
  78         {\r
  79                 return time_ == duration_ ? dest_ : tween(static_cast<double>(time_), source_, dest_, static_cast<double>(duration_), tweener_);\r
  80         }\r
  81 \r
  82         T fetch_and_tick(int num)\r
  83         {                                               \r
  84                 time_ = std::min(time_+num, duration_);\r
  85                 return fetch();\r
  86         }\r
  87 };\r
  88 \r
  89 struct mixer::implementation : boost::noncopyable\r
  90 {               \r
  91         video_channel_context& channel_;\r
  92         \r
  93         audio_mixer     audio_mixer_;\r
  94         image_mixer image_mixer_;\r
  95         \r
  96         typedef std::unordered_map<int, tweened_transform<core::image_transform>> image_transforms;\r
  97         typedef std::unordered_map<int, tweened_transform<core::audio_transform>> audio_transforms;\r
  98 \r
  99         boost::fusion::map<boost::fusion::pair<core::image_transform, image_transforms>,\r
 100                                         boost::fusion::pair<core::audio_transform, audio_transforms>> transforms_;\r
 101         \r
 102         std::queue<std::pair<boost::unique_future<safe_ptr<host_buffer>>, std::vector<int16_t>>> buffer_;\r
 103         \r
 104         const size_t buffer_size_;\r
 105 \r
 106 public:\r
 107         implementation(video_channel_context& video_channel) \r
 108                 : channel_(video_channel)\r
 109                 , audio_mixer_(channel_.get_format_desc())\r
 110                 , image_mixer_(channel_)\r
 111                 , buffer_size_(env::properties().get("configuration.producers.buffer-depth", 1))\r
 112         {       \r
 113                 CASPAR_LOG(info) << print() << L" Successfully initialized . Buffer-depth: " << buffer_size_;   \r
 114         }\r
 115                         \r
 116         safe_ptr<read_frame> execute(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 117         {                       \r
 118                 try\r
 119                 {\r
 120                         decltype(mix_image(frames)) image;\r
 121                         decltype(mix_audio(frames)) audio;\r
 122 \r
 123                         tbb::parallel_invoke(\r
 124                                         [&]{image = mix_image(frames);}, \r
 125                                         [&]{audio = mix_audio(frames);});\r
 126                         \r
 127                         buffer_.push(std::make_pair(std::move(image), audio));\r
 128 \r
 129                         if(buffer_.size() > buffer_size_)\r
 130                         {\r
 131                                 auto res = std::move(buffer_.front());\r
 132                                 buffer_.pop();\r
 133                         \r
 134                                 return make_safe<read_frame>(channel_.ogl(), channel_.get_format_desc().size, std::move(res.first.get()), std::move(res.second));\r
 135                         }\r
 136                 }\r
 137                 catch(...)\r
 138                 {\r
 139                         channel_.ogl().gc().wait();\r
 140                         image_mixer_ = image_mixer(channel_);\r
 141                         audio_mixer_ = audio_mixer(channel_.get_format_desc());\r
 142                         channel_.ogl().gc().wait();\r
 143 \r
 144                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 145                 }\r
 146                 \r
 147                 return make_safe<read_frame>();\r
 148         }\r
 149                         \r
 150         safe_ptr<core::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 151         {               \r
 152                 return image_mixer_.create_frame(tag, desc);\r
 153         }\r
 154 \r
 155         void reset_transforms()\r
 156         {\r
 157                 channel_.execution().invoke([&]\r
 158                 {\r
 159                         boost::fusion::at_key<image_transform>(transforms_).clear();\r
 160                         boost::fusion::at_key<audio_transform>(transforms_).clear();\r
 161                 });\r
 162         }\r
 163                 \r
 164         template<typename T>\r
 165         void set_transform(int index, const T& transform, unsigned int mix_duration, const std::wstring& tween)\r
 166         {\r
 167                 channel_.execution().invoke([&]\r
 168                 {\r
 169                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 170 \r
 171                         auto src = transforms[index].fetch();\r
 172                         auto dst = transform;\r
 173                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 174                 });\r
 175         }\r
 176                                 \r
 177         template<typename T>\r
 178         void apply_transform(int index, const std::function<T(T)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
 179         {\r
 180                 channel_.execution().invoke([&]\r
 181                 {\r
 182                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 183 \r
 184                         auto src = transforms[index].fetch();\r
 185                         auto dst = transform(src);\r
 186                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 187                 });\r
 188         }\r
 189                 \r
 190         std::wstring print() const\r
 191         {\r
 192                 return L"mixer";\r
 193         }\r
 194 \r
 195 private:\r
 196                 \r
 197         boost::unique_future<safe_ptr<host_buffer>> mix_image(std::map<int, safe_ptr<core::basic_frame>> frames)\r
 198         {               \r
 199                 auto& image_transforms = boost::fusion::at_key<core::image_transform>(transforms_);\r
 200                 \r
 201                 BOOST_FOREACH(auto& frame, frames)\r
 202                 {\r
 203                         image_mixer_.begin_layer();\r
 204 \r
 205                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 206                         frame1->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 207                                                 \r
 208                         if(channel_.get_format_desc().mode != core::video_mode::progressive)\r
 209                         {\r
 210                                 auto frame2 = make_safe<core::basic_frame>(frame.second);\r
 211                                 frame2->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 212                                 if(frame1->get_image_transform() != frame2->get_image_transform())\r
 213                                         frame1 = core::basic_frame::interlace(frame1, frame2, channel_.get_format_desc().mode);\r
 214                         }\r
 215 \r
 216                         frame1->accept(image_mixer_);\r
 217 \r
 218                         image_mixer_.end_layer();\r
 219                 }\r
 220 \r
 221                 return image_mixer_.render();\r
 222         }\r
 223 \r
 224         std::vector<int16_t> mix_audio(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 225         {\r
 226                 auto& audio_transforms = boost::fusion::at_key<core::audio_transform>(transforms_);\r
 227 \r
 228                 BOOST_FOREACH(auto& frame, frames)\r
 229                 {\r
 230                         const unsigned int num = channel_.get_format_desc().mode == core::video_mode::progressive ? 1 : 2;\r
 231 \r
 232                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 233                         frame1->get_audio_transform() = audio_transforms[frame.first].fetch_and_tick(num);\r
 234                         frame1->accept(audio_mixer_);\r
 235                 }\r
 236 \r
 237                 return audio_mixer_.mix();\r
 238         }\r
 239 };\r
 240         \r
 241 mixer::mixer(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 242 safe_ptr<core::read_frame> mixer::execute(const std::map<int, safe_ptr<core::basic_frame>>& frames){ return impl_->execute(frames);}\r
 243 core::video_format_desc mixer::get_video_format_desc() const { return impl_->channel_.get_format_desc(); }\r
 244 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){ return impl_->create_frame(tag, desc); }         \r
 245 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, size_t width, size_t height, core::pixel_format::type pix_fmt)\r
 246 {\r
 247         // Create bgra frame\r
 248         core::pixel_format_desc desc;\r
 249         desc.pix_fmt = pix_fmt;\r
 250         desc.planes.push_back( core::pixel_format_desc::plane(width, height, 4));\r
 251         return create_frame(tag, desc);\r
 252 }\r
 253 void mixer::reset_transforms(){impl_->reset_transforms();}\r
 254 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
 255 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
 256 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
 257 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
 258 \r
 259 }}