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 <common/exception/exceptions.h>\r
  31 #include <common/concurrency/executor.h>\r
  32 #include <common/utility/tweener.h>\r
  33 #include <common/env.h>\r
  34 #include <common/gl/gl_check.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/frame_transform.h>\r
  42 \r
  43 #include <core/video_format.h>\r
  44 \r
  45 #include <boost/fusion/container/map.hpp>\r
  46 #include <boost/fusion/include/at_key.hpp>\r
  47 #include <boost/foreach.hpp>\r
  48 \r
  49 #include <unordered_map>\r
  50 \r
  51 using namespace Concurrency;\r
  52 \r
  53 namespace caspar { namespace core {\r
  54                 \r
  55 template<typename T>\r
  56 class tweened_transform\r
  57 {\r
  58         T source_;\r
  59         T dest_;\r
  60         int duration_;\r
  61         int time_;\r
  62         tweener_t tweener_;\r
  63 public: \r
  64         tweened_transform()\r
  65                 : duration_(0)\r
  66                 , time_(0)\r
  67                 , tweener_(get_tweener(L"linear")){}\r
  68         tweened_transform(const T& source, const T& dest, int duration, const std::wstring& tween = L"linear")\r
  69                 : source_(source)\r
  70                 , dest_(dest)\r
  71                 , duration_(duration)\r
  72                 , time_(0)\r
  73                 , tweener_(get_tweener(tween)){}\r
  74         \r
  75         T fetch()\r
  76         {\r
  77                 return time_ == duration_ ? dest_ : tween(static_cast<double>(time_), source_, dest_, static_cast<double>(duration_), tweener_);\r
  78         }\r
  79 \r
  80         T fetch_and_tick(int num)\r
  81         {                                               \r
  82                 time_ = std::min(time_+num, duration_);\r
  83                 return fetch();\r
  84         }\r
  85 };\r
  86 \r
  87 struct mixer::implementation : boost::noncopyable\r
  88 {               \r
  89         const video_format_desc format_desc_;\r
  90         ogl_device&                             ogl_;\r
  91         \r
  92         audio_mixer     audio_mixer_;\r
  93         image_mixer image_mixer_;\r
  94         \r
  95         std::unordered_map<int, tweened_transform<core::frame_transform>> transforms_;  \r
  96         std::unordered_map<int, blend_mode::type> blend_modes_;\r
  97                 \r
  98         critical_section                        mutex_;\r
  99         Concurrency::transformer<safe_ptr<message<std::map<int, safe_ptr<basic_frame>>>>, \r
 100                                                          safe_ptr<message<safe_ptr<core::read_frame>>>> mixer_;\r
 101 public:\r
 102         implementation(mixer::source_t& source, mixer::target_t& target, const video_format_desc& format_desc, ogl_device& ogl) \r
 103                 : format_desc_(format_desc)\r
 104                 , ogl_(ogl)\r
 105                 , audio_mixer_(format_desc)\r
 106                 , image_mixer_(ogl, format_desc)\r
 107                 , mixer_(std::bind(&implementation::mix, this, std::placeholders::_1), &target)\r
 108         {       \r
 109                 CASPAR_LOG(info) << print() << L" Successfully initialized.";   \r
 110                 source.link_target(&mixer_);\r
 111         }\r
 112                 \r
 113         safe_ptr<message<safe_ptr<core::read_frame>>> mix(const safe_ptr<message<std::map<int, safe_ptr<basic_frame>>>>& msg)\r
 114         {               \r
 115                 auto frames = msg->value();\r
 116 \r
 117                 auto frame = make_safe<read_frame>();\r
 118 \r
 119                 try\r
 120                 {\r
 121                         {\r
 122                                 critical_section::scoped_lock lock(mutex_);\r
 123 \r
 124                                 BOOST_FOREACH(auto& frame, frames)\r
 125                                 {\r
 126                                         auto blend_it = blend_modes_.find(frame.first);\r
 127                                         image_mixer_.begin_layer(blend_it != blend_modes_.end() ? blend_it->second : blend_mode::normal);\r
 128                                 \r
 129                                         auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 130                                         frame1->get_frame_transform() = transforms_[frame.first].fetch_and_tick(1);\r
 131 \r
 132                                         if(format_desc_.field_mode != core::field_mode::progressive)\r
 133                                         {                               \r
 134                                                 auto frame2 = make_safe<core::basic_frame>(frame.second);\r
 135                                                 frame2->get_frame_transform() = transforms_[frame.first].fetch_and_tick(1);\r
 136                                                 frame1 = core::basic_frame::interlace(frame1, frame2, format_desc_.field_mode);\r
 137                                         }\r
 138                                                                         \r
 139                                         frame1->accept(audio_mixer_);                                   \r
 140                                         frame1->accept(image_mixer_);\r
 141 \r
 142                                         image_mixer_.end_layer();\r
 143                                 }\r
 144                         }\r
 145 \r
 146                         auto image = image_mixer_.render();\r
 147                         auto audio = audio_mixer_.mix();\r
 148                         \r
 149                         {\r
 150                                 scoped_oversubcription_token oversubscribe;\r
 151                                 image.wait();\r
 152                         }\r
 153 \r
 154                         frame = make_safe<read_frame>(ogl_, format_desc_.size, std::move(image.get()), std::move(audio));\r
 155                 }\r
 156                 catch(...)\r
 157                 {\r
 158                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 159                         Concurrency::wait(20);\r
 160                 }\r
 161 \r
 162                 return msg->transfer<safe_ptr<core::read_frame>>(std::move(frame));     \r
 163         }\r
 164                                                 \r
 165         boost::unique_future<safe_ptr<core::write_frame>> async_create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 166         {               \r
 167                 return image_mixer_.async_create_frame(tag, desc);\r
 168         }\r
 169                 \r
 170         void set_transform(int index, const frame_transform& transform, unsigned int mix_duration, const std::wstring& tween)\r
 171         {\r
 172                 critical_section::scoped_lock lock(mutex_);\r
 173 \r
 174                 auto src = transforms_[index].fetch();\r
 175                 auto dst = transform;\r
 176                 transforms_[index] = tweened_transform<frame_transform>(src, dst, mix_duration, tween);\r
 177         }\r
 178                                 \r
 179         void apply_transform(int index, const std::function<frame_transform(frame_transform)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
 180         {\r
 181                 critical_section::scoped_lock lock(mutex_);\r
 182 \r
 183                 auto src = transforms_[index].fetch();\r
 184                 auto dst = transform(src);\r
 185                 transforms_[index] = tweened_transform<frame_transform>(src, dst, mix_duration, tween);\r
 186         }\r
 187 \r
 188         void clear_transforms()\r
 189         {\r
 190                 critical_section::scoped_lock lock(mutex_);\r
 191 \r
 192                 transforms_.clear();\r
 193                 blend_modes_.clear();\r
 194         }\r
 195                 \r
 196         void set_blend_mode(int index, blend_mode::type value)\r
 197         {\r
 198                 critical_section::scoped_lock lock(mutex_);\r
 199 \r
 200                 blend_modes_[index] = value;\r
 201         }\r
 202 \r
 203         std::wstring print() const\r
 204         {\r
 205                 return L"mixer";\r
 206         }\r
 207 };\r
 208         \r
 209 mixer::mixer(mixer::source_t& source, mixer::target_t& target, const video_format_desc& format_desc, ogl_device& ogl) : impl_(new implementation(source, target, format_desc, ogl)){}\r
 210 core::video_format_desc mixer::get_video_format_desc() const { return impl_->format_desc_; }\r
 211 boost::unique_future<safe_ptr<write_frame>> mixer::async_create_frame(const void* video_stream_tag, const pixel_format_desc& desc){ return impl_->async_create_frame(video_stream_tag, desc); }                 \r
 212 void mixer::set_frame_transform(int index, const core::frame_transform& transform, unsigned int mix_duration, const std::wstring& tween){impl_->set_transform(index, transform, mix_duration, tween);}\r
 213 void mixer::apply_frame_transform(int index, const std::function<core::frame_transform(core::frame_transform)>& transform, unsigned int mix_duration, const std::wstring& tween){impl_->apply_transform(index, transform, mix_duration, tween);}\r
 214 void mixer::clear_transforms(){impl_->clear_transforms();}\r
 215 void mixer::set_blend_mode(int index, blend_mode::type value){impl_->set_blend_mode(index, value);}\r
 216 }}