git.sesse.net Git - casparcg/blob - core/mixer/image/image_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 "image_mixer.h"\r
  23 #include "image_kernel.h"\r
  24 \r
  25 #include "../gpu/ogl_device.h"\r
  26 #include "../gpu/host_buffer.h"\r
  27 #include "../gpu/device_buffer.h"\r
  28 #include "../write_frame.h"\r
  29 \r
  30 #include "../../video_channel_context.h"\r
  31 \r
  32 #include <common/concurrency/executor.h>\r
  33 #include <common/exception/exceptions.h>\r
  34 #include <common/gl/gl_check.h>\r
  35 \r
  36 #include <core/producer/frame/image_transform.h>\r
  37 #include <core/producer/frame/pixel_format.h>\r
  38 #include <core/video_format.h>\r
  39 \r
  40 #include <gl/glew.h>\r
  41 \r
  42 #include <boost/foreach.hpp>\r
  43 #include <boost/range.hpp>\r
  44 #include <boost/range/algorithm/find.hpp>\r
  45 \r
  46 #include <algorithm>\r
  47 #include <array>\r
  48 #include <deque>\r
  49 #include <unordered_map>\r
  50 \r
  51 namespace caspar { namespace core {\r
  52                 \r
  53 struct image_mixer::implementation : boost::noncopyable\r
  54 {               \r
  55         typedef std::deque<render_item>                                 layer;\r
  56 \r
  57         video_channel_context&                                                  channel_;\r
  58 \r
  59         std::vector<image_transform>                                    transform_stack_;\r
  60         std::vector<video_mode::type>                                   mode_stack_;\r
  61 \r
  62         std::deque<std::deque<render_item>>                             layers_; // layer/stream/items\r
  63         \r
  64         image_kernel                                                                    kernel_;\r
  65                 \r
  66         std::array<std::shared_ptr<device_buffer>,2>    draw_buffer_;\r
  67         std::shared_ptr<device_buffer>                                  write_buffer_;\r
  68 \r
  69         std::array<std::shared_ptr<device_buffer>,2>    local_key_buffer_;\r
  70         std::shared_ptr<device_buffer>                                  layer_key_buffer_;\r
  71         \r
  72 public:\r
  73         implementation(video_channel_context& video_channel) \r
  74                 : channel_(video_channel)\r
  75                 , transform_stack_(1)\r
  76                 , mode_stack_(1, video_mode::progressive)\r
  77         {\r
  78                 initialize_buffers();\r
  79         }\r
  80 \r
  81         ~implementation()\r
  82         {\r
  83                 channel_.ogl().gc();\r
  84         }\r
  85 \r
  86         void initialize_buffers()\r
  87         {\r
  88                 write_buffer_                   = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 4);\r
  89                 layer_key_buffer_               = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 1);\r
  90                 draw_buffer_[0]                 = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 4);\r
  91                 //draw_buffer_[1]                       = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 4);\r
  92                 local_key_buffer_[0]    = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 1);\r
  93                 //local_key_buffer_[1]  = channel_.ogl().create_device_buffer(channel_.get_format_desc().width, channel_.get_format_desc().height, 1);\r
  94                 channel_.ogl().gc();\r
  95         }\r
  96 \r
  97         void begin(core::basic_frame& frame)\r
  98         {\r
  99                 transform_stack_.push_back(transform_stack_.back()*frame.get_image_transform());\r
 100                 mode_stack_.push_back(frame.get_mode() == video_mode::progressive ? mode_stack_.back() : frame.get_mode());\r
 101         }\r
 102                 \r
 103         void visit(core::write_frame& frame)\r
 104         {       \r
 105                 CASPAR_ASSERT(!layers_.empty());\r
 106 \r
 107                 // Check if frame has been discarded by interlacing\r
 108                 if(boost::range::find(mode_stack_, video_mode::upper) != mode_stack_.end() && boost::range::find(mode_stack_, video_mode::lower) != mode_stack_.end())\r
 109                         return;\r
 110                 \r
 111                 core::render_item item(frame.get_pixel_format_desc(), frame.get_textures(), transform_stack_.back(), mode_stack_.back(), frame.tag());  \r
 112 \r
 113                 auto& layer = layers_.back();\r
 114 \r
 115                 auto it = boost::range::find(layer, item);\r
 116                 if(it == layer.end())\r
 117                         layer.push_back(item);\r
 118         }\r
 119 \r
 120         void end()\r
 121         {\r
 122                 transform_stack_.pop_back();\r
 123                 mode_stack_.pop_back();\r
 124         }\r
 125 \r
 126         void begin_layer()\r
 127         {\r
 128                 layers_.push_back(layer());\r
 129         }\r
 130 \r
 131         void end_layer()\r
 132         {\r
 133         }\r
 134         \r
 135         boost::unique_future<safe_ptr<host_buffer>> render()\r
 136         {               \r
 137                 auto layers = std::move(layers_);\r
 138                 return channel_.ogl().begin_invoke([=]()mutable{return render(std::move(layers));});\r
 139         }\r
 140         \r
 141         safe_ptr<host_buffer> render(std::deque<layer>&& layers)\r
 142         {\r
 143                 if(channel_.get_format_desc().width != write_buffer_->width() || channel_.get_format_desc().height != write_buffer_->height())\r
 144                         initialize_buffers();\r
 145                 \r
 146                 layer_key_buffer_->clear();\r
 147                 draw_buffer_[0]->clear();\r
 148                 //draw_buffer_[1]->clear();\r
 149                 local_key_buffer_[0]->clear();\r
 150                 //local_key_buffer_[1]->clear();\r
 151 \r
 152                 bool layer_key = false;\r
 153 \r
 154                 BOOST_FOREACH(auto& layer, layers)\r
 155                         draw(std::move(layer), layer_key);\r
 156 \r
 157                 std::swap(draw_buffer_[0], write_buffer_);\r
 158                 \r
 159                 auto host_buffer = channel_.ogl().create_host_buffer(channel_.get_format_desc().size, host_buffer::read_only);\r
 160                 host_buffer->begin_read(*write_buffer_);\r
 161                 \r
 162                 GL(glFlush());\r
 163 \r
 164                 return host_buffer;\r
 165         }\r
 166 \r
 167         void draw(layer&& layer, bool& layer_key)\r
 168         {                       \r
 169                 bool local_key = false;\r
 170 \r
 171                 local_key_buffer_[0]->clear();\r
 172 \r
 173                 BOOST_FOREACH(auto& item, layer)\r
 174                         draw(std::move(item), local_key, layer_key);\r
 175                 \r
 176                 layer_key = local_key;\r
 177 \r
 178                 std::swap(local_key_buffer_[0], layer_key_buffer_);\r
 179         }\r
 180 \r
 181         void draw(render_item&& item, bool& local_key, bool& layer_key)\r
 182         {                                                                                       \r
 183                 if(item.transform.get_is_key())\r
 184                 {\r
 185                         draw(local_key_buffer_, std::move(item), nullptr, nullptr);\r
 186                         local_key = true;\r
 187                 }\r
 188                 else\r
 189                 {\r
 190                         draw(draw_buffer_, std::move(item), local_key ? local_key_buffer_[0] : nullptr, layer_key ? layer_key_buffer_ : nullptr);       \r
 191                         local_key_buffer_[0]->clear();\r
 192                         local_key = false;\r
 193                 }\r
 194                 channel_.ogl().yield(); // Return resources to pool as early as possible.\r
 195         }\r
 196         \r
 197         void draw(std::array<std::shared_ptr<device_buffer>,2>& targets, render_item&& item, const std::shared_ptr<device_buffer>& local_key, const std::shared_ptr<device_buffer>& layer_key)\r
 198         {\r
 199                 if(!std::all_of(item.textures.begin(), item.textures.end(), std::mem_fn(&device_buffer::ready)))\r
 200                 {\r
 201                         CASPAR_LOG(warning) << L"[image_mixer] Performance warning. Host to device transfer not complete, GPU will be stalled";\r
 202                         channel_.ogl().yield(); // Try to give it some more time.\r
 203                 }               \r
 204 \r
 205                 targets[0]->attach();\r
 206                 kernel_.draw(item, make_safe(targets[0]), local_key, layer_key);\r
 207 \r
 208                 //targets[1]->attach();\r
 209                         \r
 210                 //kernel_.draw(item, make_safe(targets[0]), local_key, layer_key);\r
 211                 \r
 212                 //targets[0]->bind();\r
 213 \r
 214                 //glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, targets[0]->width(), targets[0]->height());\r
 215                 \r
 216                 //std::swap(targets[0], targets[1]);\r
 217         }\r
 218                                 \r
 219         safe_ptr<write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
 220         {\r
 221                 return make_safe<write_frame>(channel_.ogl(), tag, desc);\r
 222         }\r
 223 };\r
 224 \r
 225 image_mixer::image_mixer(video_channel_context& video_channel) : impl_(new implementation(video_channel)){}\r
 226 void image_mixer::begin(core::basic_frame& frame){impl_->begin(frame);}\r
 227 void image_mixer::visit(core::write_frame& frame){impl_->visit(frame);}\r
 228 void image_mixer::end(){impl_->end();}\r
 229 boost::unique_future<safe_ptr<host_buffer>> image_mixer::render(){return impl_->render();}\r
 230 safe_ptr<write_frame> image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc){return impl_->create_frame(tag, desc);}\r
 231 void image_mixer::begin_layer(){impl_->begin_layer();}\r
 232 void image_mixer::end_layer(){impl_->end_layer();}\r
 233 image_mixer& image_mixer::operator=(image_mixer&& other)\r
 234 {\r
 235         impl_ = std::move(other.impl_);\r
 236         return *this;\r
 237 }\r
 238 \r
 239 }}