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 #include <common/gl/gl_check.h>\r
  37 \r
  38 #include <core/mixer/read_frame.h>\r
  39 #include <core/mixer/write_frame.h>\r
  40 #include <core/producer/frame/basic_frame.h>\r
  41 #include <core/producer/frame/frame_factory.h>\r
  42 #include <core/producer/frame/pixel_format.h>\r
  43 #include <core/producer/frame/audio_transform.h>\r
  44 #include <core/producer/frame/image_transform.h>\r
  45 \r
  46 #include <core/video_format.h>\r
  47 \r
  48 #include <boost/fusion/container/map.hpp>\r
  49 #include <boost/fusion/include/at_key.hpp>\r
  50 #include <boost/foreach.hpp>\r
  51 \r
  52 #include <tbb/parallel_invoke.h>\r
  53 \r
  54 #include <unordered_map>\r
  55 \r
  56 namespace caspar { namespace core {\r
  57                 \r
  58 template<typename T>\r
  59 class tweened_transform\r
  60 {\r
  61         T source_;\r
  62         T dest_;\r
  63         int duration_;\r
  64         int time_;\r
  65         tweener_t tweener_;\r
  66 public: \r
  67         tweened_transform()\r
  68                 : duration_(0)\r
  69                 , time_(0)\r
  70                 , tweener_(get_tweener(L"linear")){}\r
  71         tweened_transform(const T& source, const T& dest, int duration, const std::wstring& tween = L"linear")\r
  72                 : source_(source)\r
  73                 , dest_(dest)\r
  74                 , duration_(duration)\r
  75                 , time_(0)\r
  76                 , tweener_(get_tweener(tween)){}\r
  77         \r
  78         T fetch()\r
  79         {\r
  80                 return time_ == duration_ ? dest_ : tween(static_cast<double>(time_), source_, dest_, static_cast<double>(duration_), tweener_);\r
  81         }\r
  82 \r
  83         T fetch_and_tick(int num)\r
  84         {                                               \r
  85                 time_ = std::min(time_+num, duration_);\r
  86                 return fetch();\r
  87         }\r
  88 };\r
  89 \r
  90 struct mixer::implementation : boost::noncopyable\r
  91 {               \r
  92         video_channel_context& channel_;\r
  93         \r
  94         audio_mixer     audio_mixer_;\r
  95         image_mixer image_mixer_;\r
  96         \r
  97         typedef std::unordered_map<int, tweened_transform<core::image_transform>> image_transforms;\r
  98         typedef std::unordered_map<int, tweened_transform<core::audio_transform>> audio_transforms;\r
  99 \r
 100         boost::fusion::map<boost::fusion::pair<core::image_transform, image_transforms>,\r
 101                                         boost::fusion::pair<core::audio_transform, audio_transforms>> transforms_;\r
 102         \r
 103         std::unordered_map<int, blend_mode::type> blend_modes_;\r
 104 \r
 105         std::queue<std::pair<boost::unique_future<safe_ptr<host_buffer>>, std::vector<int16_t>>> buffer_;\r
 106         \r
 107         const size_t buffer_size_;\r
 108 \r
 109 public:\r
 110         implementation(video_channel_context& video_channel) \r
 111                 : channel_(video_channel)\r
 112                 , audio_mixer_(channel_.get_format_desc())\r
 113                 , image_mixer_(channel_)\r
 114                 , buffer_size_(env::properties().get("configuration.producers.buffer-depth", 1))\r
 115         {       \r
 116                 CASPAR_LOG(info) << print() << L" Successfully initialized . Buffer-depth: " << buffer_size_;   \r
 117         }\r
 118                         \r
 119         safe_ptr<read_frame> execute(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 120         {                       \r
 121                 try\r
 122                 {\r
 123                         decltype(mix_image(frames)) image;\r
 124                         decltype(mix_audio(frames)) audio;\r
 125 \r
 126                         tbb::parallel_invoke\r
 127                         (\r
 128                                 [&]{image = mix_image(frames);}, \r
 129                                 [&]{audio = mix_audio(frames);}\r
 130                         );\r
 131                         \r
 132                         buffer_.push(std::make_pair(std::move(image), audio));\r
 133 \r
 134                         if(buffer_.size()-1 < buffer_size_)                     \r
 135                                 return make_safe<read_frame>();\r
 136                 \r
 137                         auto res = std::move(buffer_.front());\r
 138                         buffer_.pop();\r
 139 \r
 140                         return make_safe<read_frame>(channel_.ogl(), channel_.get_format_desc().size, std::move(res.first.get()), std::move(res.second));       \r
 141                 }\r
 142                 catch(...)\r
 143                 {\r
 144                         CASPAR_LOG(error) << L"[mixer] Error detected.";\r
 145                         throw;\r
 146                 }                               \r
 147         }\r
 148                                         \r
 149         safe_ptr<core::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 150         {               \r
 151                 return image_mixer_.create_frame(tag, desc);\r
 152         }\r
 153 \r
 154         void reset_transforms()\r
 155         {\r
 156                 channel_.execution().invoke([&]\r
 157                 {\r
 158                         boost::fusion::at_key<image_transform>(transforms_).clear();\r
 159                         boost::fusion::at_key<audio_transform>(transforms_).clear();\r
 160                 });\r
 161         }\r
 162                 \r
 163         template<typename T>\r
 164         void set_transform(int index, const T& transform, unsigned int mix_duration, const std::wstring& tween)\r
 165         {\r
 166                 channel_.execution().invoke([&]\r
 167                 {\r
 168                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 169 \r
 170                         auto src = transforms[index].fetch();\r
 171                         auto dst = transform;\r
 172                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 173                 });\r
 174         }\r
 175                                 \r
 176         template<typename T>\r
 177         void apply_transform(int index, const std::function<T(T)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
 178         {\r
 179                 channel_.execution().invoke([&]\r
 180                 {\r
 181                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 182 \r
 183                         auto src = transforms[index].fetch();\r
 184                         auto dst = transform(src);\r
 185                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 186                 });\r
 187         }\r
 188                 \r
 189         void set_blend_mode(int index, blend_mode::type value)\r
 190         {\r
 191                 blend_modes_[index] = value;\r
 192         }\r
 193 \r
 194         std::wstring print() const\r
 195         {\r
 196                 return L"mixer";\r
 197         }\r
 198 \r
 199 private:\r
 200                 \r
 201         boost::unique_future<safe_ptr<host_buffer>> mix_image(std::map<int, safe_ptr<core::basic_frame>> frames)\r
 202         {               \r
 203                 auto& image_transforms = boost::fusion::at_key<core::image_transform>(transforms_);\r
 204                 \r
 205                 BOOST_FOREACH(auto& frame, frames)\r
 206                 {\r
 207                         auto blend_it = blend_modes_.find(frame.first);\r
 208                         image_mixer_.begin_layer(blend_it != blend_modes_.end() ? blend_it->second : blend_mode::normal);\r
 209 \r
 210                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 211                         frame1->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 212                                                 \r
 213                         if(channel_.get_format_desc().mode != core::video_mode::progressive)\r
 214                         {\r
 215                                 auto frame2 = make_safe<core::basic_frame>(frame.second);\r
 216                                 frame2->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 217                                 if(frame1->get_image_transform() != frame2->get_image_transform())\r
 218                                         frame1 = core::basic_frame::interlace(frame1, frame2, channel_.get_format_desc().mode);\r
 219                         }\r
 220 \r
 221                         frame1->accept(image_mixer_);\r
 222 \r
 223                         image_mixer_.end_layer();\r
 224                 }\r
 225 \r
 226                 return image_mixer_.render();\r
 227         }\r
 228 \r
 229         std::vector<int16_t> mix_audio(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 230         {\r
 231                 auto& audio_transforms = boost::fusion::at_key<core::audio_transform>(transforms_);\r
 232 \r
 233                 BOOST_FOREACH(auto& frame, frames)\r
 234                 {\r
 235                         const unsigned int num = channel_.get_format_desc().mode == core::video_mode::progressive ? 1 : 2;\r
 236 \r
 237                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 238                         frame1->get_audio_transform() = audio_transforms[frame.first].fetch_and_tick(num);\r
 239                         frame1->accept(audio_mixer_);\r
 240                 }\r
 241 \r
 242                 return audio_mixer_.mix();\r
 243         }\r
 244 };\r
 245         \r
 246 mixer::mixer(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 247 safe_ptr<core::read_frame> mixer::execute(const std::map<int, safe_ptr<core::basic_frame>>& frames){ return impl_->execute(frames);}\r
 248 core::video_format_desc mixer::get_video_format_desc() const { return impl_->channel_.get_format_desc(); }\r
 249 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){ return impl_->create_frame(tag, desc); }         \r
 250 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, size_t width, size_t height, core::pixel_format::type pix_fmt)\r
 251 {\r
 252         // Create bgra frame\r
 253         core::pixel_format_desc desc;\r
 254         desc.pix_fmt = pix_fmt;\r
 255         desc.planes.push_back( core::pixel_format_desc::plane(width, height, 4));\r
 256         return create_frame(tag, desc);\r
 257 }\r
 258 void mixer::reset_transforms(){impl_->reset_transforms();}\r
 259 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
 260 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
 261 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
 262 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
 263 void mixer::set_blend_mode(int index, blend_mode::type value){impl_->set_blend_mode(index, value);}\r
 264 }}