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/frame_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 <unordered_map>\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         video_channel_context& channel_;\r
  90         \r
  91         audio_mixer     audio_mixer_;\r
  92         image_mixer image_mixer_;\r
  93         \r
  94         std::unordered_map<int, tweened_transform<core::frame_transform>> transforms_;  \r
  95         std::unordered_map<int, blend_mode::type> blend_modes_;\r
  96 \r
  97         std::queue<std::pair<boost::unique_future<safe_ptr<host_buffer>>, core::audio_buffer>> buffer_;\r
  98         \r
  99         const size_t buffer_size_;\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_.ogl(), channel_.get_format_desc())\r
 106                 , buffer_size_(env::properties().get("configuration.producers.buffer-depth", 1))\r
 107         {       \r
 108                 CASPAR_LOG(info) << print() << L" Successfully initialized . Buffer-depth: " << buffer_size_;   \r
 109         }\r
 110                         \r
 111         safe_ptr<read_frame> execute(const std::map<int, safe_ptr<core::basic_frame>>& frames)\r
 112         {                       \r
 113                 try\r
 114                 {\r
 115                         BOOST_FOREACH(auto& frame, frames)\r
 116                         {\r
 117                                 auto blend_it = blend_modes_.find(frame.first);\r
 118                                 image_mixer_.begin_layer(blend_it != blend_modes_.end() ? blend_it->second : blend_mode::normal);\r
 119                                 \r
 120                                 auto frame1 = make_safe<core::basic_frame>(frame.second);\r
 121                                 frame1->get_frame_transform() = transforms_[frame.first].fetch_and_tick(1);\r
 122 \r
 123                                 if(channel_.get_format_desc().field_mode != core::field_mode::progressive)\r
 124                                 {                               \r
 125                                         auto frame2 = make_safe<core::basic_frame>(frame.second);\r
 126                                         frame2->get_frame_transform() = transforms_[frame.first].fetch_and_tick(1);\r
 127                                         frame1 = core::basic_frame::interlace(frame1, frame2, channel_.get_format_desc().field_mode);\r
 128                                 }\r
 129                                                                         \r
 130                                 frame1->accept(audio_mixer_);                                   \r
 131                                 frame1->accept(image_mixer_);\r
 132 \r
 133                                 image_mixer_.end_layer();\r
 134                         }\r
 135 \r
 136                         auto image = image_mixer_.render();\r
 137                         auto audio = audio_mixer_.mix();\r
 138                         \r
 139                         buffer_.push(std::make_pair(std::move(image), audio));\r
 140 \r
 141                         if(buffer_.size()-1 < buffer_size_)                     \r
 142                                 return make_safe<read_frame>();\r
 143                 \r
 144                         auto res = std::move(buffer_.front());\r
 145                         buffer_.pop();\r
 146 \r
 147                         return make_safe<read_frame>(channel_.ogl(), channel_.get_format_desc().size, std::move(res.first.get()), std::move(res.second));       \r
 148                 }\r
 149                 catch(...)\r
 150                 {\r
 151                         CASPAR_LOG(error) << L"[mixer] Error detected.";\r
 152                         throw;\r
 153                 }                               \r
 154         }\r
 155                                         \r
 156         safe_ptr<core::write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 157         {               \r
 158                 return image_mixer_.create_frame(tag, desc);\r
 159         }\r
 160 \r
 161         boost::unique_future<safe_ptr<core::write_frame>> create_frame2(const void* tag, const core::pixel_format_desc& desc)\r
 162         {               \r
 163                 return image_mixer_.create_frame2(tag, desc);\r
 164         }\r
 165                 \r
 166         void set_transform(int index, const frame_transform& transform, unsigned int mix_duration, const std::wstring& tween)\r
 167         {\r
 168                 channel_.execution().invoke([&]\r
 169                 {\r
 170                         auto src = transforms_[index].fetch();\r
 171                         auto dst = transform;\r
 172                         transforms_[index] = tweened_transform<frame_transform>(src, dst, mix_duration, tween);\r
 173                 }, high_priority);\r
 174         }\r
 175                                 \r
 176         void apply_transform(int index, const std::function<frame_transform(frame_transform)>& transform, unsigned int mix_duration, const std::wstring& tween)\r
 177         {\r
 178                 channel_.execution().invoke([&]\r
 179                 {\r
 180                         auto src = transforms_[index].fetch();\r
 181                         auto dst = transform(src);\r
 182                         transforms_[index] = tweened_transform<frame_transform>(src, dst, mix_duration, tween);\r
 183                 }, high_priority);\r
 184         }\r
 185 \r
 186         void clear_transforms()\r
 187         {\r
 188                 channel_.execution().invoke([&]\r
 189                 {\r
 190                         transforms_.clear();\r
 191                         blend_modes_.clear();\r
 192                 }, high_priority);\r
 193         }\r
 194                 \r
 195         void set_blend_mode(int index, blend_mode::type value)\r
 196         {\r
 197                 channel_.execution().invoke([&]\r
 198                 {\r
 199                         blend_modes_[index] = value;\r
 200                 }, high_priority);\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(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 210 safe_ptr<core::read_frame> mixer::execute(const std::map<int, safe_ptr<core::basic_frame>>& frames){ return impl_->execute(frames);}\r
 211 core::video_format_desc mixer::get_video_format_desc() const { return impl_->channel_.get_format_desc(); }\r
 212 safe_ptr<core::write_frame> mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){ return impl_->create_frame(tag, desc); }         \r
 213 boost::unique_future<safe_ptr<write_frame>> mixer::create_frame2(const void* video_stream_tag, const pixel_format_desc& desc){ return impl_->create_frame2(video_stream_tag, desc); }                   \r
 214 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
 215 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
 216 void mixer::clear_transforms(){impl_->clear_transforms();}\r
 217 void mixer::set_blend_mode(int index, blend_mode::type value){impl_->set_blend_mode(index, value);}\r
 218 }}