git.sesse.net Git - casparcg/blob - accelerator/ogl/image/image_mixer.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\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 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 #include "../../stdafx.h"\r
  22 \r
  23 #include "image_mixer.h"\r
  24 \r
  25 #include "image_kernel.h"\r
  26 \r
  27 #include "../util/device.h"\r
  28 #include "../util/buffer.h"\r
  29 #include "../util/texture.h"\r
  30 \r
  31 #include <common/gl/gl_check.h>\r
  32 #include <common/future.h>\r
  33 #include <common/array.h>\r
  34 \r
  35 #include <core/frame/frame.h>\r
  36 #include <core/frame/frame_transform.h>\r
  37 #include <core/frame/pixel_format.h>\r
  38 #include <core/video_format.h>\r
  39 \r
  40 #include <asmlib.h>\r
  41 \r
  42 #include <gl/glew.h>\r
  43 \r
  44 #include <boost/foreach.hpp>\r
  45 #include <boost/range/algorithm_ext/erase.hpp>\r
  46 #include <boost/thread/future.hpp>\r
  47 \r
  48 #include <algorithm>\r
  49 #include <vector>\r
  50 \r
  51 using namespace boost::assign;\r
  52 \r
  53 namespace caspar { namespace accelerator { namespace ogl {\r
  54                 \r
  55 typedef boost::shared_future<spl::shared_ptr<texture>> future_texture;\r
  56 \r
  57 struct item\r
  58 {\r
  59         core::pixel_format_desc                                                         pix_desc;\r
  60         core::field_mode                                                                        field_mode;\r
  61         std::vector<future_texture>                                                     textures;\r
  62         core::image_transform                                                           transform;\r
  63 \r
  64         item()\r
  65                 : pix_desc(core::pixel_format::invalid)\r
  66                 , field_mode(core::field_mode::empty)\r
  67         {\r
  68         }\r
  69 };\r
  70 \r
  71 struct layer\r
  72 {\r
  73         std::vector<item>       items;\r
  74         core::blend_mode        blend_mode;\r
  75 \r
  76         layer()\r
  77                 : blend_mode(core::blend_mode::normal)\r
  78         {\r
  79         }\r
  80 \r
  81         layer(std::vector<item> items, core::blend_mode blend_mode)\r
  82                 : items(std::move(items))\r
  83                 , blend_mode(blend_mode)\r
  84         {\r
  85         }\r
  86 };\r
  87 \r
  88 class image_renderer\r
  89 {\r
  90         spl::shared_ptr<device> ogl_;\r
  91         image_kernel                    kernel_;\r
  92 public:\r
  93         image_renderer(const spl::shared_ptr<device>& ogl)\r
  94                 : ogl_(ogl)\r
  95                 , kernel_(ogl_)\r
  96         {\r
  97         }\r
  98         \r
  99         boost::unique_future<array<const std::uint8_t>> operator()(std::vector<layer> layers, const core::video_format_desc& format_desc)\r
 100         {       \r
 101                 if(layers.empty())\r
 102                 { // Bypass GPU with empty frame.\r
 103                         auto buffer = spl::make_shared<const std::vector<uint8_t, tbb::cache_aligned_allocator<uint8_t>>>(format_desc.size, 0);\r
 104                         return async(launch::deferred, [=]\r
 105                         {\r
 106                                 return array<const std::uint8_t>(buffer->data(), format_desc.size, true, buffer);\r
 107                         });\r
 108                 }               \r
 109 \r
 110                 return flatten(ogl_->begin_invoke([=]() mutable -> boost::shared_future<array<const std::uint8_t>>\r
 111                 {\r
 112                         auto target_texture = ogl_->create_texture(format_desc.width, format_desc.height, 4);\r
 113 \r
 114                         if(format_desc.field_mode != core::field_mode::progressive)\r
 115                         {\r
 116                                 draw(target_texture, layers,                    format_desc, core::field_mode::upper);\r
 117                                 draw(target_texture, std::move(layers), format_desc, core::field_mode::lower);\r
 118                         }\r
 119                         else                    \r
 120                                 draw(target_texture, std::move(layers), format_desc, core::field_mode::progressive);\r
 121                                                                 \r
 122                         return ogl_->copy_async(target_texture);\r
 123                 }));\r
 124         }\r
 125 \r
 126 private:        \r
 127         \r
 128         void draw(spl::shared_ptr<texture>&                     target_texture, \r
 129                           std::vector<layer>                            layers, \r
 130                           const core::video_format_desc&        format_desc,\r
 131                           core::field_mode                                      field_mode)\r
 132         {\r
 133                 std::shared_ptr<texture> layer_key_texture;\r
 134 \r
 135                 BOOST_FOREACH(auto& layer, layers)\r
 136                         draw(target_texture, std::move(layer), layer_key_texture, format_desc, field_mode);\r
 137         }\r
 138 \r
 139         void draw(spl::shared_ptr<texture>&             target_texture,\r
 140                           layer                                                 layer, \r
 141                           std::shared_ptr<texture>&             layer_key_texture,\r
 142                           const core::video_format_desc&        format_desc,\r
 143                           core::field_mode                              field_mode)\r
 144         {               \r
 145                 // Fix frames           \r
 146                 BOOST_FOREACH(auto& item, layer.items)          \r
 147                 {\r
 148                         //if(std::abs(item.transform.fill_scale[1]-1.0) > 1.0/target_texture->height() ||\r
 149                         //   std::abs(item.transform.fill_translation[1]) > 1.0/target_texture->height())               \r
 150                         //      CASPAR_LOG(warning) << L"[image_mixer] Frame should be deinterlaced. Send FILTER DEINTERLACE_BOB when creating producer.";      \r
 151 \r
 152                         if(item.pix_desc.planes.at(0).height == 480) // NTSC DV\r
 153                         {\r
 154                                 item.transform.fill_translation[1] += 2.0/static_cast<double>(format_desc.height);\r
 155                                 item.transform.fill_scale[1] *= 1.0 - 6.0*1.0/static_cast<double>(format_desc.height);\r
 156                         }\r
 157         \r
 158                         // Fix field-order if needed\r
 159                         if(item.field_mode == core::field_mode::lower && format_desc.field_mode == core::field_mode::upper)\r
 160                                 item.transform.fill_translation[1] += 1.0/static_cast<double>(format_desc.height);\r
 161                         else if(item.field_mode == core::field_mode::upper && format_desc.field_mode == core::field_mode::lower)\r
 162                                 item.transform.fill_translation[1] -= 1.0/static_cast<double>(format_desc.height);\r
 163                 }\r
 164 \r
 165                 // Mask out fields\r
 166                 BOOST_FOREACH(auto& item, layer.items)                          \r
 167                         item.transform.field_mode &= field_mode;\r
 168                 \r
 169                 // Remove empty items.\r
 170                 boost::range::remove_erase_if(layer.items, [&](const item& item)\r
 171                 {\r
 172                         return item.transform.field_mode == core::field_mode::empty;\r
 173                 });\r
 174                 \r
 175                 // Remove first field stills.\r
 176                 if(format_desc.field_mode != core::field_mode::progressive)\r
 177                 {\r
 178                         boost::range::remove_erase_if(layer.items, [&](const item& item)\r
 179                         {\r
 180                                 return item.transform.is_still && item.transform.field_mode == format_desc.field_mode; // only use last field for stills.\r
 181                         });\r
 182                 }\r
 183 \r
 184                 // Stills are progressive, TODO: deinterlace.\r
 185                 BOOST_FOREACH(auto& item, layer.items)\r
 186                 {\r
 187                         if(item.transform.is_still)\r
 188                                 item.transform.field_mode = core::field_mode::progressive;\r
 189                 }\r
 190 \r
 191                 if(layer.items.empty())\r
 192                         return;\r
 193 \r
 194                 std::shared_ptr<texture> local_key_texture;\r
 195                 std::shared_ptr<texture> local_mix_texture;\r
 196                                 \r
 197                 if(layer.blend_mode != core::blend_mode::normal)\r
 198                 {\r
 199                         auto layer_texture = ogl_->create_texture(target_texture->width(), target_texture->height(), 4);\r
 200 \r
 201                         BOOST_FOREACH(auto& item, layer.items)\r
 202                                 draw(layer_texture, std::move(item), layer_key_texture, local_key_texture, local_mix_texture);  \r
 203                 \r
 204                         draw(layer_texture, std::move(local_mix_texture), core::blend_mode::normal);                                                    \r
 205                         draw(target_texture, std::move(layer_texture), layer.blend_mode);\r
 206                 }\r
 207                 else // fast path\r
 208                 {\r
 209                         BOOST_FOREACH(auto& item, layer.items)          \r
 210                                 draw(target_texture, std::move(item), layer_key_texture, local_key_texture, local_mix_texture);         \r
 211                                         \r
 212                         draw(target_texture, std::move(local_mix_texture), core::blend_mode::normal);\r
 213                 }                                       \r
 214 \r
 215                 layer_key_texture = std::move(local_key_texture);\r
 216         }\r
 217 \r
 218         void draw(spl::shared_ptr<texture>&     target_texture, \r
 219                           item                                          item, \r
 220                       std::shared_ptr<texture>& layer_key_texture, \r
 221                           std::shared_ptr<texture>&     local_key_texture, \r
 222                           std::shared_ptr<texture>&     local_mix_texture)\r
 223         {                       \r
 224                 draw_params draw_params;\r
 225                 draw_params.pix_desc    = std::move(item.pix_desc);\r
 226                 draw_params.transform   = std::move(item.transform);\r
 227 \r
 228                 BOOST_FOREACH(auto& future_texture, item.textures)\r
 229                         draw_params.textures.push_back(future_texture.get());\r
 230 \r
 231                 if(item.transform.is_key)\r
 232                 {\r
 233                         local_key_texture = local_key_texture ? local_key_texture : ogl_->create_texture(target_texture->width(), target_texture->height(), 1);\r
 234 \r
 235                         draw_params.background                  = local_key_texture;\r
 236                         draw_params.local_key                   = nullptr;\r
 237                         draw_params.layer_key                   = nullptr;\r
 238 \r
 239                         kernel_.draw(std::move(draw_params));\r
 240                 }\r
 241                 else if(item.transform.is_mix)\r
 242                 {\r
 243                         local_mix_texture = local_mix_texture ? local_mix_texture : ogl_->create_texture(target_texture->width(), target_texture->height(), 4);\r
 244 \r
 245                         draw_params.background                  = local_mix_texture;\r
 246                         draw_params.local_key                   = std::move(local_key_texture);\r
 247                         draw_params.layer_key                   = layer_key_texture;\r
 248 \r
 249                         draw_params.keyer                               = keyer::additive;\r
 250 \r
 251                         kernel_.draw(std::move(draw_params));\r
 252                 }\r
 253                 else\r
 254                 {\r
 255                         draw(target_texture, std::move(local_mix_texture), core::blend_mode::normal);\r
 256                         \r
 257                         draw_params.background                  = target_texture;\r
 258                         draw_params.local_key                   = std::move(local_key_texture);\r
 259                         draw_params.layer_key                   = layer_key_texture;\r
 260 \r
 261                         kernel_.draw(std::move(draw_params));\r
 262                 }       \r
 263         }\r
 264 \r
 265         void draw(spl::shared_ptr<texture>&      target_texture, \r
 266                           std::shared_ptr<texture>&& source_buffer, \r
 267                           core::blend_mode                       blend_mode = core::blend_mode::normal)\r
 268         {\r
 269                 if(!source_buffer)\r
 270                         return;\r
 271 \r
 272                 draw_params draw_params;\r
 273                 draw_params.pix_desc.format             = core::pixel_format::bgra;\r
 274                 draw_params.pix_desc.planes             = list_of(core::pixel_format_desc::plane(source_buffer->width(), source_buffer->height(), 4));\r
 275                 draw_params.textures                    = list_of(source_buffer);\r
 276                 draw_params.transform                   = core::image_transform();\r
 277                 draw_params.blend_mode                  = blend_mode;\r
 278                 draw_params.background                  = target_texture;\r
 279 \r
 280                 kernel_.draw(std::move(draw_params));\r
 281         }\r
 282 };\r
 283                 \r
 284 struct image_mixer::impl : public core::frame_factory\r
 285 {       \r
 286         spl::shared_ptr<device>                         ogl_;\r
 287         image_renderer                                          renderer_;\r
 288         std::vector<core::image_transform>      transform_stack_;\r
 289         std::vector<layer>                                      layers_; // layer/stream/items\r
 290 public:\r
 291         impl(const spl::shared_ptr<device>& ogl) \r
 292                 : ogl_(ogl)\r
 293                 , renderer_(ogl)\r
 294                 , transform_stack_(1)   \r
 295         {\r
 296                 CASPAR_LOG(info) << L"Initialized OpenGL Accelerated GPU Image Mixer";\r
 297         }\r
 298 \r
 299         void begin_layer(core::blend_mode blend_mode)\r
 300         {\r
 301                 layers_.push_back(layer(std::vector<item>(), blend_mode));\r
 302         }\r
 303                 \r
 304         void push(const core::frame_transform& transform)\r
 305         {\r
 306                 transform_stack_.push_back(transform_stack_.back()*transform.image_transform);\r
 307         }\r
 308                 \r
 309         void visit(const core::const_frame& frame)\r
 310         {                       \r
 311                 if(frame.pixel_format_desc().format == core::pixel_format::invalid)\r
 312                         return;\r
 313 \r
 314                 if(frame.pixel_format_desc().planes.empty())\r
 315                         return;\r
 316 \r
 317                 if(transform_stack_.back().field_mode == core::field_mode::empty)\r
 318                         return;\r
 319 \r
 320                 item item;\r
 321                 item.pix_desc   = frame.pixel_format_desc();\r
 322                 item.field_mode = frame.field_mode();\r
 323                 item.transform  = transform_stack_.back();\r
 324                 \r
 325                 // NOTE: Once we have copied the arrays they are no longer valid for reading!!! Check for alternative solution e.g. transfer with AMD_pinned_memory.\r
 326                 for(int n = 0; n < static_cast<int>(item.pix_desc.planes.size()); ++n)\r
 327                         item.textures.push_back(ogl_->copy_async(frame.image_data(n), item.pix_desc.planes[n].width, item.pix_desc.planes[n].height, item.pix_desc.planes[n].stride));\r
 328                 \r
 329                 layers_.back().items.push_back(item);\r
 330         }\r
 331 \r
 332         void pop()\r
 333         {\r
 334                 transform_stack_.pop_back();\r
 335         }\r
 336 \r
 337         void end_layer()\r
 338         {               \r
 339         }\r
 340         \r
 341         boost::unique_future<array<const std::uint8_t>> render(const core::video_format_desc& format_desc)\r
 342         {\r
 343                 return renderer_(std::move(layers_), format_desc);\r
 344         }\r
 345         \r
 346         core::mutable_frame create_frame(const void* tag, const core::pixel_format_desc& desc, double frame_rate, core::field_mode field_mode) override\r
 347         {\r
 348                 std::vector<array<std::uint8_t>> buffers;\r
 349                 BOOST_FOREACH(auto& plane, desc.planes)         \r
 350                         buffers.push_back(ogl_->create_array(plane.size));              \r
 351 \r
 352                 return core::mutable_frame(std::move(buffers), core::audio_buffer(), tag, desc, frame_rate, field_mode);\r
 353         }\r
 354 };\r
 355 \r
 356 image_mixer::image_mixer(const spl::shared_ptr<device>& ogl) : impl_(new impl(ogl)){}\r
 357 image_mixer::~image_mixer(){}\r
 358 void image_mixer::push(const core::frame_transform& transform){impl_->push(transform);}\r
 359 void image_mixer::visit(const core::const_frame& frame){impl_->visit(frame);}\r
 360 void image_mixer::pop(){impl_->pop();}\r
 361 boost::unique_future<array<const std::uint8_t>> image_mixer::operator()(const core::video_format_desc& format_desc){return impl_->render(format_desc);}\r
 362 void image_mixer::begin_layer(core::blend_mode blend_mode){impl_->begin_layer(blend_mode);}\r
 363 void image_mixer::end_layer(){impl_->end_layer();}\r
 364 core::mutable_frame image_mixer::create_frame(const void* tag, const core::pixel_format_desc& desc, double frame_rate, core::field_mode field_mode) {return impl_->create_frame(tag, desc, frame_rate, field_mode);}\r
 365 \r
 366 }}}