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 \r
  49 #include <unordered_map>\r
  50 \r
  51 namespace caspar { namespace core {\r
  52                 \r
  53 template<typename T>\r
  54 class tweened_transform\r
  55 {\r
  56         T source_;\r
  57         T dest_;\r
  58         int duration_;\r
  59         int time_;\r
  60         tweener_t tweener_;\r
  61 public: \r
  62         tweened_transform()\r
  63                 : duration_(0)\r
  64                 , time_(0)\r
  65                 , tweener_(get_tweener(L"linear")){}\r
  66         tweened_transform(const T& source, const T& dest, int duration, const std::wstring& tween = L"linear")\r
  67                 : source_(source)\r
  68                 , dest_(dest)\r
  69                 , duration_(duration)\r
  70                 , time_(0)\r
  71                 , tweener_(get_tweener(tween)){}\r
  72         \r
  73         T fetch()\r
  74         {\r
  75                 return time_ == duration_ ? dest_ : tween(static_cast<double>(time_), source_, dest_, static_cast<double>(duration_), tweener_);\r
  76         }\r
  77 \r
  78         T fetch_and_tick(int num)\r
  79         {                                               \r
  80                 time_ = std::min(time_+num, duration_);\r
  81                 return fetch();\r
  82         }\r
  83 };\r
  84 \r
  85 struct mixer::implementation : boost::noncopyable\r
  86 {               \r
  87         video_channel_context& channel_;\r
  88         \r
  89         audio_mixer     audio_mixer_;\r
  90         image_mixer image_mixer_;\r
  91         \r
  92         typedef std::unordered_map<int, tweened_transform<core::image_transform>> image_transforms;\r
  93         typedef std::unordered_map<int, tweened_transform<core::audio_transform>> audio_transforms;\r
  94 \r
  95         boost::fusion::map<boost::fusion::pair<core::image_transform, image_transforms>,\r
  96                                         boost::fusion::pair<core::audio_transform, audio_transforms>> transforms_;\r
  97         \r
  98 public:\r
  99         implementation(video_channel_context& video_channel) \r
 100                 : channel_(video_channel)\r
 101                 , audio_mixer_(channel_.get_format_desc())\r
 102                 , image_mixer_(channel_)\r
 103         {       \r
 104                 CASPAR_LOG(info) << print() << L" Successfully initialized.";   \r
 105         }\r
 106                         \r
 107         safe_ptr<read_frame> execute(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 108         {                       \r
 109                 try\r
 110                 {\r
 111                         auto image = mix_image(frames);\r
 112                         auto audio = mix_audio(frames);\r
 113                         \r
 114                         return make_safe<read_frame>(channel_.ogl(), std::move(image.get()), std::move(audio));\r
 115                 }\r
 116                 catch(...)\r
 117                 {\r
 118                         channel_.ogl().gc().wait();\r
 119                         image_mixer_ = image_mixer(channel_);\r
 120                         audio_mixer_ = audio_mixer(channel_.get_format_desc());\r
 121                         channel_.ogl().gc().wait();\r
 122 \r
 123                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 124                         return make_safe<read_frame>();\r
 125                 }\r
 126         }\r
 127                         \r
 128         safe_ptr<core::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 129         {               \r
 130                 return image_mixer_.create_frame(tag, desc);\r
 131         }\r
 132 \r
 133         void reset_transforms()\r
 134         {\r
 135                 channel_.execution().invoke([&]\r
 136                 {\r
 137                         boost::fusion::at_key<image_transform>(transforms_).clear();\r
 138                         boost::fusion::at_key<audio_transform>(transforms_).clear();\r
 139                 });\r
 140         }\r
 141                 \r
 142         template<typename T>\r
 143         void set_transform(int index, const T& transform, unsigned int mix_duration, const std::wstring& tween)\r
 144         {\r
 145                 channel_.execution().invoke([&]\r
 146                 {\r
 147                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 148 \r
 149                         auto src = transforms[index].fetch();\r
 150                         auto dst = transform;\r
 151                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 152                 });\r
 153         }\r
 154                                 \r
 155         template<typename T>\r
 156         void apply_transform(int index, const std::function<T(T)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
 157         {\r
 158                 channel_.execution().invoke([&]\r
 159                 {\r
 160                         auto& transforms = boost::fusion::at_key<T>(transforms_);\r
 161 \r
 162                         auto src = transforms[index].fetch();\r
 163                         auto dst = transform(src);\r
 164                         transforms[index] = tweened_transform<T>(src, dst, mix_duration, tween);\r
 165                 });\r
 166         }\r
 167                 \r
 168         std::wstring print() const\r
 169         {\r
 170                 return L"mixer";\r
 171         }\r
 172 \r
 173 private:\r
 174                 \r
 175         boost::unique_future<safe_ptr<host_buffer>> mix_image(std::map<int, safe_ptr<core::basic_frame>> frames)\r
 176         {               \r
 177                 auto& image_transforms = boost::fusion::at_key<core::image_transform>(transforms_);\r
 178                 \r
 179                 BOOST_FOREACH(auto& frame, frames)\r
 180                 {\r
 181                         image_mixer_.begin_layer();\r
 182                         \r
 183                         if(channel_.get_format_desc().mode != core::video_mode::progressive)\r
 184                         {\r
 185                                 auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 186                                 auto frame2 = make_safe<core::basic_frame>(frame.second);\r
 187                                 \r
 188                                 frame1->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 189                                 frame2->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 190 \r
 191                                 if(frame1->get_image_transform() != frame2->get_image_transform())\r
 192                                         core::basic_frame::interlace(frame1, frame2, channel_.get_format_desc().mode)->accept(image_mixer_);\r
 193                                 else\r
 194                                         frame2->accept(image_mixer_);\r
 195                         }\r
 196                         else\r
 197                         {\r
 198                                 auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 199                                 frame1->get_image_transform() = image_transforms[frame.first].fetch_and_tick(1);\r
 200                                 frame1->accept(image_mixer_);\r
 201                         }\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 }}