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/concurrency/async.h>\r
  33 #include <common/memory/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<core::const_array> 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 core::const_array(buffer->data(), format_desc.size, true, buffer);\r
 107                         });\r
 108                 }               \r
 109 \r
 110                 return flatten(ogl_->begin_invoke([=]() mutable -> boost::shared_future<core::const_array>\r
 111                 {\r
 112                         auto draw_buffer = create_mixer_buffer(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(layers,                    draw_buffer, format_desc, core::field_mode::upper);\r
 117                                 draw(std::move(layers), draw_buffer, format_desc, core::field_mode::lower);\r
 118                         }\r
 119                         else                    \r
 120                                 draw(std::move(layers), draw_buffer, format_desc, core::field_mode::progressive);\r
 121                                                                 \r
 122                         return make_shared(ogl_->copy_async(draw_buffer));\r
 123                 }));\r
 124         }\r
 125 \r
 126 private:        \r
 127         \r
 128         void draw(std::vector<layer>                            layers, \r
 129                           spl::shared_ptr<texture>&                     draw_buffer, \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_buffer;\r
 134 \r
 135                 BOOST_FOREACH(auto& layer, layers)\r
 136                         draw_layer(std::move(layer), draw_buffer, layer_key_buffer, format_desc, field_mode);\r
 137         }\r
 138 \r
 139         void draw_layer(layer                                                   layer, \r
 140                                         spl::shared_ptr<texture>&               draw_buffer,\r
 141                                         std::shared_ptr<texture>&               layer_key_buffer,\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(item.pix_desc.planes.at(0).height == 480) // NTSC DV\r
 149                         {\r
 150                                 item.transform.fill_translation[1] += 2.0/static_cast<double>(format_desc.height);\r
 151                                 item.transform.fill_scale[1] = 1.0 - 6.0*1.0/static_cast<double>(format_desc.height);\r
 152                         }\r
 153         \r
 154                         // Fix field-order if needed\r
 155                         if(item.field_mode == core::field_mode::lower && format_desc.field_mode == core::field_mode::upper)\r
 156                                 item.transform.fill_translation[1] += 1.0/static_cast<double>(format_desc.height);\r
 157                         else if(item.field_mode == core::field_mode::upper && format_desc.field_mode == core::field_mode::lower)\r
 158                                 item.transform.fill_translation[1] -= 1.0/static_cast<double>(format_desc.height);\r
 159                 }\r
 160 \r
 161                 // Mask out fields\r
 162                 BOOST_FOREACH(auto& item, layer.items)                          \r
 163                         item.transform.field_mode &= field_mode;\r
 164                 \r
 165                 // Remove empty items.\r
 166                 boost::range::remove_erase_if(layer.items, [&](const item& item)\r
 167                 {\r
 168                         return item.transform.field_mode == core::field_mode::empty;\r
 169                 });\r
 170                 \r
 171                 // Remove first field stills.\r
 172                 boost::range::remove_erase_if(layer.items, [&](const item& item)\r
 173                 {\r
 174                         return item.transform.is_still && item.transform.field_mode == format_desc.field_mode; // only use last field for stills.\r
 175                 });\r
 176 \r
 177                 if(layer.items.empty())\r
 178                         return;\r
 179 \r
 180                 std::shared_ptr<texture> local_key_buffer;\r
 181                 std::shared_ptr<texture> local_mix_buffer;\r
 182                                 \r
 183                 if(layer.blend_mode != core::blend_mode::normal)\r
 184                 {\r
 185                         auto layer_draw_buffer = create_mixer_buffer(draw_buffer->width(), draw_buffer->height(), 4);\r
 186 \r
 187                         BOOST_FOREACH(auto& item, layer.items)\r
 188                                 draw_item(std::move(item), layer_draw_buffer, layer_key_buffer, local_key_buffer, local_mix_buffer);    \r
 189                 \r
 190                         draw_mixer_buffer(layer_draw_buffer, std::move(local_mix_buffer), core::blend_mode::normal);                                                    \r
 191                         draw_mixer_buffer(draw_buffer, std::move(layer_draw_buffer), layer.blend_mode);\r
 192                 }\r
 193                 else // fast path\r
 194                 {\r
 195                         BOOST_FOREACH(auto& item, layer.items)          \r
 196                                 draw_item(std::move(item), draw_buffer, layer_key_buffer, local_key_buffer, local_mix_buffer);          \r
 197                                         \r
 198                         draw_mixer_buffer(draw_buffer, std::move(local_mix_buffer), core::blend_mode::normal);\r
 199                 }                                       \r
 200 \r
 201                 layer_key_buffer = std::move(local_key_buffer);\r
 202         }\r
 203 \r
 204         void draw_item(item                                                     item, \r
 205                                    spl::shared_ptr<texture>&    draw_buffer, \r
 206                                    std::shared_ptr<texture>&    layer_key_buffer, \r
 207                                    std::shared_ptr<texture>&    local_key_buffer, \r
 208                                    std::shared_ptr<texture>&    local_mix_buffer)\r
 209         {                                       \r
 210                 draw_params draw_params;\r
 211                 draw_params.pix_desc    = std::move(item.pix_desc);\r
 212                 draw_params.transform   = std::move(item.transform);\r
 213                 BOOST_FOREACH(auto& future_texture, item.textures)\r
 214                         draw_params.textures.push_back(future_texture.get());\r
 215 \r
 216                 if(item.transform.is_key)\r
 217                 {\r
 218                         local_key_buffer = local_key_buffer ? local_key_buffer : create_mixer_buffer(draw_buffer->width(), draw_buffer->height(), 1);\r
 219 \r
 220                         draw_params.background                  = local_key_buffer;\r
 221                         draw_params.local_key                   = nullptr;\r
 222                         draw_params.layer_key                   = nullptr;\r
 223 \r
 224                         kernel_.draw(std::move(draw_params));\r
 225                 }\r
 226                 else if(item.transform.is_mix)\r
 227                 {\r
 228                         local_mix_buffer = local_mix_buffer ? local_mix_buffer : create_mixer_buffer(draw_buffer->width(), draw_buffer->height(), 4);\r
 229 \r
 230                         draw_params.background                  = local_mix_buffer;\r
 231                         draw_params.local_key                   = std::move(local_key_buffer);\r
 232                         draw_params.layer_key                   = layer_key_buffer;\r
 233 \r
 234                         draw_params.keyer                               = keyer::additive;\r
 235 \r
 236                         kernel_.draw(std::move(draw_params));\r
 237                 }\r
 238                 else\r
 239                 {\r
 240                         draw_mixer_buffer(draw_buffer, std::move(local_mix_buffer), core::blend_mode::normal);\r
 241                         \r
 242                         draw_params.background                  = draw_buffer;\r
 243                         draw_params.local_key                   = std::move(local_key_buffer);\r
 244                         draw_params.layer_key                   = layer_key_buffer;\r
 245 \r
 246                         kernel_.draw(std::move(draw_params));\r
 247                 }       \r
 248         }\r
 249 \r
 250         void draw_mixer_buffer(spl::shared_ptr<texture>&        draw_buffer, \r
 251                                                    std::shared_ptr<texture>&&   source_buffer, \r
 252                                                    core::blend_mode                             blend_mode = core::blend_mode::normal)\r
 253         {\r
 254                 if(!source_buffer)\r
 255                         return;\r
 256 \r
 257                 draw_params draw_params;\r
 258                 draw_params.pix_desc.format             = core::pixel_format::bgra;\r
 259                 draw_params.pix_desc.planes             = list_of(core::pixel_format_desc::plane(source_buffer->width(), source_buffer->height(), 4));\r
 260                 draw_params.textures                    = list_of(source_buffer);\r
 261                 draw_params.transform                   = core::image_transform();\r
 262                 draw_params.blend_mode                  = blend_mode;\r
 263                 draw_params.background                  = draw_buffer;\r
 264 \r
 265                 kernel_.draw(std::move(draw_params));\r
 266         }\r
 267                         \r
 268         spl::shared_ptr<texture> create_mixer_buffer(int width, int height, int stride)\r
 269         {\r
 270                 auto buffer = ogl_->create_texture(width, height, stride);\r
 271                 buffer->clear();\r
 272                 return buffer;\r
 273         }\r
 274 };\r
 275                 \r
 276 struct image_mixer::impl : boost::noncopyable\r
 277 {       \r
 278         spl::shared_ptr<device>                         ogl_;\r
 279         image_renderer                                          renderer_;\r
 280         std::vector<core::image_transform>      transform_stack_;\r
 281         std::vector<layer>                                      layers_; // layer/stream/items\r
 282 public:\r
 283         impl(const spl::shared_ptr<device>& ogl) \r
 284                 : ogl_(ogl)\r
 285                 , renderer_(ogl)\r
 286                 , transform_stack_(1)   \r
 287         {\r
 288                 CASPAR_LOG(info) << L"Initialized OpenGL Accelerated GPU Image Mixer";\r
 289         }\r
 290 \r
 291         void begin_layer(core::blend_mode blend_mode)\r
 292         {\r
 293                 layers_.push_back(layer(std::vector<item>(), blend_mode));\r
 294         }\r
 295                 \r
 296         void push(const core::frame_transform& transform)\r
 297         {\r
 298                 transform_stack_.push_back(transform_stack_.back()*transform.image_transform);\r
 299         }\r
 300                 \r
 301         void visit(const core::const_frame& frame)\r
 302         {                       \r
 303                 if(frame.pixel_format_desc().format == core::pixel_format::invalid)\r
 304                         return;\r
 305 \r
 306                 if(frame.pixel_format_desc().planes.empty())\r
 307                         return;\r
 308 \r
 309                 if(transform_stack_.back().field_mode == core::field_mode::empty)\r
 310                         return;\r
 311 \r
 312                 item item;\r
 313                 item.pix_desc   = frame.pixel_format_desc();\r
 314                 item.field_mode = frame.field_mode();\r
 315                 item.transform  = transform_stack_.back();\r
 316                 for(int n = 0; n < static_cast<int>(item.pix_desc.planes.size()); ++n)\r
 317                         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
 318                 \r
 319                 layers_.back().items.push_back(item);\r
 320         }\r
 321 \r
 322         void pop()\r
 323         {\r
 324                 transform_stack_.pop_back();\r
 325         }\r
 326 \r
 327         void end_layer()\r
 328         {               \r
 329         }\r
 330         \r
 331         boost::unique_future<core::const_array> render(const core::video_format_desc& format_desc)\r
 332         {\r
 333                 return renderer_(std::move(layers_), format_desc);\r
 334         }\r
 335         \r
 336         virtual core::mutable_frame create_frame(const void* tag, const core::pixel_format_desc& desc, double frame_rate, core::field_mode field_mode)\r
 337         {\r
 338                 std::vector<core::mutable_array> buffers;\r
 339                 BOOST_FOREACH(auto& plane, desc.planes)         \r
 340                         buffers.push_back(ogl_->create_array(plane.size));              \r
 341 \r
 342                 return core::mutable_frame(std::move(buffers), core::audio_buffer(), tag, desc, frame_rate, field_mode);\r
 343         }\r
 344 };\r
 345 \r
 346 image_mixer::image_mixer(const spl::shared_ptr<device>& ogl) : impl_(new impl(ogl)){}\r
 347 image_mixer::~image_mixer(){}\r
 348 void image_mixer::push(const core::frame_transform& transform){impl_->push(transform);}\r
 349 void image_mixer::visit(const core::const_frame& frame){impl_->visit(frame);}\r
 350 void image_mixer::pop(){impl_->pop();}\r
 351 boost::unique_future<core::const_array> image_mixer::operator()(const core::video_format_desc& format_desc){return impl_->render(format_desc);}\r
 352 void image_mixer::begin_layer(core::blend_mode blend_mode){impl_->begin_layer(blend_mode);}\r
 353 void image_mixer::end_layer(){impl_->end_layer();}\r
 354 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
 355 \r
 356 }}}