git.sesse.net Git - casparcg/blob - modules/ogl/consumer/ogl_consumer.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 \r
  22 #include "ogl_consumer.h"\r
  23 \r
  24 #include <GL/glew.h>\r
  25 #include <SFML/Window.hpp>\r
  26 \r
  27 #include <common/diagnostics/graph.h>\r
  28 #include <common/gl/gl_check.h>\r
  29 #include <common/log/log.h>\r
  30 #include <common/memory/safe_ptr.h>\r
  31 #include <common/memory/memcpy.h>\r
  32 #include <common/memory/memshfl.h>\r
  33 #include <common/utility/timer.h>\r
  34 #include <common/utility/string.h>\r
  35 \r
  36 #include <ffmpeg/producer/filter/filter.h>\r
  37 \r
  38 #include <core/video_format.h>\r
  39 #include <core/mixer/read_frame.h>\r
  40 #include <core/consumer/frame_consumer.h>\r
  41 \r
  42 #include <boost/timer.hpp>\r
  43 #include <boost/circular_buffer.hpp>\r
  44 #include <boost/foreach.hpp>\r
  45 #include <boost/thread.hpp>\r
  46 #include <boost/property_tree/ptree.hpp>\r
  47 \r
  48 #include <tbb/atomic.h>\r
  49 #include <tbb/concurrent_queue.h>\r
  50 \r
  51 #include <boost/assign.hpp>\r
  52 \r
  53 #include <algorithm>\r
  54 #include <vector>\r
  55 \r
  56 #if defined(_MSC_VER)\r
  57 #pragma warning (push)\r
  58 #pragma warning (disable : 4244)\r
  59 #endif\r
  60 extern "C" \r
  61 {\r
  62         #define __STDC_CONSTANT_MACROS\r
  63         #define __STDC_LIMIT_MACROS\r
  64         #include <libavcodec/avcodec.h>\r
  65         #include <libavutil/imgutils.h>\r
  66 }\r
  67 #if defined(_MSC_VER)\r
  68 #pragma warning (pop)\r
  69 #endif\r
  70 \r
  71 namespace caspar { namespace ogl {\r
  72                 \r
  73 enum stretch\r
  74 {\r
  75         none,\r
  76         uniform,\r
  77         fill,\r
  78         uniform_to_fill\r
  79 };\r
  80 \r
  81 struct configuration\r
  82 {\r
  83         enum aspect_ratio\r
  84         {\r
  85                 aspect_4_3 = 0,\r
  86                 aspect_16_9,\r
  87                 aspect_invalid,\r
  88         };\r
  89                 \r
  90         std::wstring    name;\r
  91         size_t                  screen_index;\r
  92         stretch                 stretch;\r
  93         bool                    windowed;\r
  94         bool                    auto_deinterlace;\r
  95         bool                    key_only;\r
  96         aspect_ratio    aspect; \r
  97 \r
  98         configuration()\r
  99                 : name(L"ogl")\r
 100                 , screen_index(0)\r
 101                 , stretch(fill)\r
 102                 , windowed(true)\r
 103                 , auto_deinterlace(true)\r
 104                 , key_only(false)\r
 105                 , aspect(aspect_invalid)\r
 106         {\r
 107         }\r
 108 };\r
 109 \r
 110 struct ogl_consumer : boost::noncopyable\r
 111 {               \r
 112         const configuration             config_;\r
 113         core::video_format_desc format_desc_;\r
 114         int                                             channel_index_;\r
 115 \r
 116         GLuint                                  texture_;\r
 117         std::vector<GLuint>             pbos_;\r
 118                         \r
 119         float                                   width_;\r
 120         float                                   height_;        \r
 121         unsigned int                    screen_x_;\r
 122         unsigned int                    screen_y_;\r
 123         unsigned int                    screen_width_;\r
 124         unsigned int                    screen_height_;\r
 125         size_t                                  square_width_;\r
 126         size_t                                  square_height_;                         \r
 127         \r
 128         sf::Window                              window_;\r
 129         \r
 130         safe_ptr<diagnostics::graph>    graph_;\r
 131         boost::timer                                    perf_timer_;\r
 132         boost::timer                                    tick_timer_;\r
 133 \r
 134         tbb::concurrent_bounded_queue<safe_ptr<core::read_frame>>       frame_buffer_;\r
 135 \r
 136         boost::thread                   thread_;\r
 137         tbb::atomic<bool>               is_running_;\r
 138         \r
 139         ffmpeg::filter                  filter_;\r
 140 public:\r
 141         ogl_consumer(const configuration& config, const core::video_format_desc& format_desc, int channel_index) \r
 142                 : config_(config)\r
 143                 , format_desc_(format_desc)\r
 144                 , channel_index_(channel_index)\r
 145                 , texture_(0)\r
 146                 , pbos_(2, 0)   \r
 147                 , screen_width_(format_desc.width)\r
 148                 , screen_height_(format_desc.height)\r
 149                 , square_width_(format_desc.square_width)\r
 150                 , square_height_(format_desc.square_height)\r
 151                 , filter_(format_desc.field_mode == core::field_mode::progressive || !config.auto_deinterlace ? L"" : L"YADIF=0:-1", boost::assign::list_of(PIX_FMT_BGRA))\r
 152         {               \r
 153                 if(format_desc_.format == core::video_format::ntsc && config_.aspect == configuration::aspect_4_3)\r
 154                 {\r
 155                         // Use default values which are 4:3.\r
 156                 }\r
 157                 else\r
 158                 {\r
 159                         if(config_.aspect == configuration::aspect_16_9)\r
 160                                 square_width_ = (format_desc.height*16)/9;\r
 161                         else if(config_.aspect == configuration::aspect_4_3)\r
 162                                 square_width_ = (format_desc.height*4)/3;\r
 163                 }\r
 164 \r
 165                 frame_buffer_.set_capacity(2);\r
 166                 \r
 167                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
 168                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));\r
 169                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));\r
 170                 graph_->set_text(print());\r
 171                 diagnostics::register_graph(graph_);\r
 172                                                                         \r
 173                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};                        \r
 174                 std::vector<DISPLAY_DEVICE> displayDevices;\r
 175                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
 176                         displayDevices.push_back(d_device);\r
 177 \r
 178                 if(config_.screen_index >= displayDevices.size())\r
 179                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;\r
 180                 \r
 181                 DEVMODE devmode = {};\r
 182                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 183                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;\r
 184                 \r
 185                 screen_x_               = devmode.dmPosition.x;\r
 186                 screen_y_               = devmode.dmPosition.y;\r
 187                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;\r
 188                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;\r
 189                 \r
 190                 is_running_ = true;\r
 191                 thread_ = boost::thread([this]{run();});\r
 192         }\r
 193         \r
 194         ~ogl_consumer()\r
 195         {\r
 196                 is_running_ = false;\r
 197                 frame_buffer_.try_push(make_safe<core::read_frame>());\r
 198                 thread_.join();\r
 199         }\r
 200 \r
 201         void init()\r
 202         {\r
 203                 if(!GLEW_VERSION_2_1)\r
 204                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));\r
 205 \r
 206                 window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), narrow(print()), config_.windowed ? sf::Style::Resize | sf::Style::Close : sf::Style::Fullscreen);\r
 207                 window_.ShowMouseCursor(false);\r
 208                 window_.SetPosition(screen_x_, screen_y_);\r
 209                 window_.SetSize(screen_width_, screen_height_);\r
 210                 window_.SetActive();\r
 211                 GL(glEnable(GL_TEXTURE_2D));\r
 212                 GL(glDisable(GL_DEPTH_TEST));           \r
 213                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 214                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 215                 GL(glLoadIdentity());\r
 216                                 \r
 217                 calculate_aspect();\r
 218                         \r
 219                 GL(glGenTextures(1, &texture_));\r
 220                 GL(glBindTexture(GL_TEXTURE_2D, texture_));\r
 221                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));\r
 222                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));\r
 223                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));\r
 224                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));\r
 225                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));\r
 226                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 227                                         \r
 228                 GL(glGenBuffers(2, pbos_.data()));\r
 229                         \r
 230                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 231                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 232                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 233                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 234                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 235 \r
 236                 CASPAR_LOG(info) << print() << " Successfully Initialized.";\r
 237         }\r
 238 \r
 239         void uninit()\r
 240         {               \r
 241                 if(texture_)\r
 242                         glDeleteTextures(1, &texture_);\r
 243 \r
 244                 BOOST_FOREACH(auto& pbo, pbos_)\r
 245                 {\r
 246                         if(pbo)\r
 247                                 glDeleteBuffers(1, &pbo);\r
 248                 }\r
 249         }\r
 250 \r
 251         void run()\r
 252         {\r
 253                 try\r
 254                 {\r
 255                         init();\r
 256 \r
 257                         while(is_running_)\r
 258                         {                       \r
 259                                 try\r
 260                                 {\r
 261 \r
 262                                         sf::Event e;            \r
 263                                         while(window_.GetEvent(e))\r
 264                                         {\r
 265                                                 if(e.Type == sf::Event::Resized)\r
 266                                                         calculate_aspect();\r
 267                                                 else if(e.Type == sf::Event::Closed)\r
 268                                                         is_running_ = false;\r
 269                                         }\r
 270                         \r
 271                                         safe_ptr<core::read_frame> frame;\r
 272                                         frame_buffer_.pop(frame);\r
 273                                         \r
 274                                         perf_timer_.restart();\r
 275                                         render(frame);\r
 276                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);    \r
 277 \r
 278                                         window_.Display();\r
 279                                         \r
 280                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);     \r
 281                                         tick_timer_.restart();\r
 282                                 }\r
 283                                 catch(...)\r
 284                                 {\r
 285                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 286                                         is_running_ = false;\r
 287                                 }\r
 288                         }\r
 289 \r
 290                         uninit();\r
 291                 }\r
 292                 catch(...)\r
 293                 {\r
 294                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 295                 }\r
 296         }\r
 297         \r
 298         safe_ptr<AVFrame> get_av_frame()\r
 299         {               \r
 300                 safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 301                 avcodec_get_frame_defaults(av_frame.get());\r
 302                                                 \r
 303                 av_frame->linesize[0]           = format_desc_.width*4;                 \r
 304                 av_frame->format                        = PIX_FMT_BGRA;\r
 305                 av_frame->width                         = format_desc_.width;\r
 306                 av_frame->height                        = format_desc_.height;\r
 307                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;\r
 308                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;\r
 309 \r
 310                 return av_frame;\r
 311         }\r
 312 \r
 313         void render(const safe_ptr<core::read_frame>& frame)\r
 314         {                       \r
 315                 if(static_cast<size_t>(frame->image_data().size()) != format_desc_.size)\r
 316                         return;\r
 317                                         \r
 318                 auto av_frame = get_av_frame();\r
 319                 av_frame->data[0] = const_cast<uint8_t*>(frame->image_data().begin());\r
 320 \r
 321                 filter_.push(av_frame);\r
 322                 auto frames = filter_.poll_all();\r
 323 \r
 324                 if(frames.empty())\r
 325                         return;\r
 326 \r
 327                 av_frame = frames[0];\r
 328 \r
 329                 if(av_frame->linesize[0] != static_cast<int>(format_desc_.width*4))\r
 330                 {\r
 331                         const uint8_t *src_data[4] = {0};\r
 332                         memcpy(const_cast<uint8_t**>(&src_data[0]), av_frame->data, 4);\r
 333                         const int src_linesizes[4] = {0};\r
 334                         memcpy(const_cast<int*>(&src_linesizes[0]), av_frame->linesize, 4);\r
 335 \r
 336                         auto av_frame2 = get_av_frame();\r
 337                         av_image_alloc(av_frame2->data, av_frame2->linesize, av_frame2->width, av_frame2->height, PIX_FMT_BGRA, 16);\r
 338                         av_frame = safe_ptr<AVFrame>(av_frame2.get(), [=](AVFrame*)\r
 339                         {\r
 340                                 av_freep(&av_frame2->data[0]);\r
 341                         });\r
 342 \r
 343                         av_image_copy(av_frame2->data, av_frame2->linesize, src_data, src_linesizes, PIX_FMT_BGRA, av_frame2->width, av_frame2->height);\r
 344                 }\r
 345 \r
 346                 glBindTexture(GL_TEXTURE_2D, texture_);\r
 347 \r
 348                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]);\r
 349                 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0);\r
 350 \r
 351                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]);\r
 352                 glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW);\r
 353 \r
 354                 auto ptr = glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY);\r
 355                 if(ptr)\r
 356                 {\r
 357                         if(config_.key_only)\r
 358                                 fast_memshfl(reinterpret_cast<char*>(ptr), av_frame->data[0], frame->image_data().size(), 0x0F0F0F0F, 0x0B0B0B0B, 0x07070707, 0x03030303);\r
 359                         else\r
 360                                 fast_memcpy(reinterpret_cast<char*>(ptr), av_frame->data[0], frame->image_data().size());\r
 361 \r
 362                         glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER); // release the mapped buffer\r
 363                 }\r
 364 \r
 365                 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);\r
 366                                 \r
 367                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 368                 glBegin(GL_QUADS);\r
 369                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);\r
 370                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);\r
 371                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);\r
 372                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);\r
 373                 glEnd();\r
 374                 \r
 375                 glBindTexture(GL_TEXTURE_2D, 0);\r
 376 \r
 377                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 378         }\r
 379 \r
 380         bool send(const safe_ptr<core::read_frame>& frame)\r
 381         {\r
 382                 if(!frame_buffer_.try_push(frame))\r
 383                         graph_->set_tag("dropped-frame");\r
 384                 return is_running_;\r
 385         }\r
 386                 \r
 387         std::wstring print() const\r
 388         {       \r
 389                 return config_.name + L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";\r
 390         }\r
 391         \r
 392         void calculate_aspect()\r
 393         {\r
 394                 if(config_.windowed)\r
 395                 {\r
 396                         screen_height_ = window_.GetHeight();\r
 397                         screen_width_ = window_.GetWidth();\r
 398                 }\r
 399                 \r
 400                 GL(glViewport(0, 0, screen_width_, screen_height_));\r
 401 \r
 402                 std::pair<float, float> target_ratio = None();\r
 403                 if(config_.stretch == fill)\r
 404                         target_ratio = Fill();\r
 405                 else if(config_.stretch == uniform)\r
 406                         target_ratio = Uniform();\r
 407                 else if(config_.stretch == uniform_to_fill)\r
 408                         target_ratio = UniformToFill();\r
 409 \r
 410                 width_ = target_ratio.first;\r
 411                 height_ = target_ratio.second;\r
 412         }\r
 413                 \r
 414         std::pair<float, float> None()\r
 415         {\r
 416                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 417                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 418 \r
 419                 return std::make_pair(width, height);\r
 420         }\r
 421 \r
 422         std::pair<float, float> Uniform()\r
 423         {\r
 424                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);\r
 425                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 426                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 427 \r
 428                 return std::make_pair(width, height);\r
 429         }\r
 430 \r
 431         std::pair<float, float> Fill()\r
 432         {\r
 433                 return std::make_pair(1.0f, 1.0f);\r
 434         }\r
 435 \r
 436         std::pair<float, float> UniformToFill()\r
 437         {\r
 438                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 439                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 440                 float r_inv = 1.0f/std::min(wr, hr);\r
 441 \r
 442                 float width = wr*r_inv;\r
 443                 float height = hr*r_inv;\r
 444 \r
 445                 return std::make_pair(width, height);\r
 446         }\r
 447 };\r
 448 \r
 449 \r
 450 struct ogl_consumer_proxy : public core::frame_consumer\r
 451 {\r
 452         const configuration config_;\r
 453         std::unique_ptr<ogl_consumer> consumer_;\r
 454 \r
 455 public:\r
 456 \r
 457         ogl_consumer_proxy(const configuration& config)\r
 458                 : config_(config){}\r
 459         \r
 460         ~ogl_consumer_proxy()\r
 461         {\r
 462                 if(consumer_)\r
 463                 {\r
 464                         auto str = print();\r
 465                         consumer_.reset();\r
 466                         CASPAR_LOG(info) << str << L" Successfully Uninitialized.";     \r
 467                 }\r
 468         }\r
 469 \r
 470         // frame_consumer\r
 471 \r
 472         virtual void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
 473         {\r
 474                 consumer_.reset();\r
 475                 consumer_.reset(new ogl_consumer(config_, format_desc, channel_index));\r
 476                 CASPAR_LOG(info) << print() << L" Successfully Initialized.";   \r
 477         }\r
 478         \r
 479         virtual bool send(const safe_ptr<core::read_frame>& frame) override\r
 480         {\r
 481                 return consumer_->send(frame);\r
 482         }\r
 483         \r
 484         virtual std::wstring print() const override\r
 485         {\r
 486                 return consumer_ ? consumer_->print() : L"[ogl_consumer]";\r
 487         }\r
 488 \r
 489         virtual boost::property_tree::wptree info() const override\r
 490         {\r
 491                 boost::property_tree::wptree info;\r
 492                 info.add(L"type", L"ogl-consumer");\r
 493                 info.add(L"key-only", config_.key_only);\r
 494                 info.add(L"windowed", config_.windowed);\r
 495                 info.add(L"auto-deinterlace", config_.auto_deinterlace);\r
 496                 return info;\r
 497         }\r
 498 \r
 499         virtual bool has_synchronization_clock() const override\r
 500         {\r
 501                 return false;\r
 502         }\r
 503         \r
 504         virtual size_t buffer_depth() const override\r
 505         {\r
 506                 return 1;\r
 507         }\r
 508 \r
 509         virtual int index() const override\r
 510         {\r
 511                 return 600;\r
 512         }\r
 513 };      \r
 514 \r
 515 safe_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 516 {\r
 517         if(params.size() < 1 || params[0] != L"SCREEN")\r
 518                 return core::frame_consumer::empty();\r
 519         \r
 520         configuration config;\r
 521                 \r
 522         auto device_it = std::find(params.begin(), params.end(), L"DEVICE");\r
 523         if(device_it != params.end() && ++device_it != params.end())\r
 524                 config.screen_index = boost::lexical_cast<int>(*device_it);\r
 525                 \r
 526         config.key_only = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();\r
 527         config.key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();\r
 528 \r
 529         auto name_it    = std::find(params.begin(), params.end(), L"NAME");\r
 530         if(name_it != params.end() && ++name_it != params.end())\r
 531                 config.name = *name_it;\r
 532 \r
 533         return make_safe<ogl_consumer_proxy>(config);\r
 534 }\r
 535 \r
 536 safe_ptr<core::frame_consumer> create_consumer(const boost::property_tree::wptree& ptree) \r
 537 {\r
 538         configuration config;\r
 539         config.name                             = ptree.get(L"name",     config.name);\r
 540         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;\r
 541         config.windowed                 = ptree.get(L"windowed", config.windowed);\r
 542         config.key_only                 = ptree.get(L"key-only", config.key_only);\r
 543         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);\r
 544         \r
 545         auto stretch_str = ptree.get(L"stretch", L"default");\r
 546         if(stretch_str == L"uniform")\r
 547                 config.stretch = stretch::uniform;\r
 548         else if(stretch_str == L"uniform_to_fill")\r
 549                 config.stretch = stretch::uniform_to_fill;\r
 550 \r
 551         auto aspect_str = ptree.get(L"aspect-ratio", L"default");\r
 552         if(aspect_str == L"16:9")\r
 553                 config.aspect = configuration::aspect_16_9;\r
 554         else if(aspect_str == L"4:3")\r
 555                 config.aspect = configuration::aspect_4_3;\r
 556         \r
 557         return make_safe<ogl_consumer_proxy>(config);\r
 558 }\r
 559 \r
 560 }}