git.sesse.net Git - casparcg/blob - modules/screen/consumer/screen_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 "screen_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.h>\r
  30 #include <common/spl/memory.h>\r
  31 #include <common/memory/array.h>\r
  32 #include <common/memory/memshfl.h>\r
  33 #include <common/utf.h>\r
  34 \r
  35 #include <ffmpeg/producer/filter/filter.h>\r
  36 \r
  37 #include <core/video_format.h>\r
  38 #include <core/frame/frame.h>\r
  39 #include <core/consumer/frame_consumer.h>\r
  40 \r
  41 #include <boost/timer.hpp>\r
  42 #include <boost/circular_buffer.hpp>\r
  43 #include <boost/foreach.hpp>\r
  44 #include <boost/thread.hpp>\r
  45 #include <boost/property_tree/ptree.hpp>\r
  46 \r
  47 #include <tbb/atomic.h>\r
  48 #include <tbb/concurrent_queue.h>\r
  49 #include <tbb/parallel_for.h>\r
  50 \r
  51 #include <boost/assign.hpp>\r
  52 \r
  53 #include <asmlib.h>\r
  54 \r
  55 #include <algorithm>\r
  56 #include <vector>\r
  57 \r
  58 #if defined(_MSC_VER)\r
  59 #pragma warning (push)\r
  60 #pragma warning (disable : 4244)\r
  61 #endif\r
  62 extern "C" \r
  63 {\r
  64         #define __STDC_CONSTANT_MACROS\r
  65         #define __STDC_LIMIT_MACROS\r
  66         #include <libavcodec/avcodec.h>\r
  67         #include <libavutil/imgutils.h>\r
  68 }\r
  69 #if defined(_MSC_VER)\r
  70 #pragma warning (pop)\r
  71 #endif\r
  72 \r
  73 namespace caspar { namespace screen {\r
  74                 \r
  75 enum stretch\r
  76 {\r
  77         none,\r
  78         uniform,\r
  79         fill,\r
  80         uniform_to_fill\r
  81 };\r
  82 \r
  83 struct configuration\r
  84 {\r
  85         enum aspect_ratio\r
  86         {\r
  87                 aspect_4_3 = 0,\r
  88                 aspect_16_9,\r
  89                 aspect_invalid,\r
  90         };\r
  91                 \r
  92         std::wstring    name;\r
  93         int                             screen_index;\r
  94         stretch                 stretch;\r
  95         bool                    windowed;\r
  96         bool                    auto_deinterlace;\r
  97         bool                    key_only;\r
  98         aspect_ratio    aspect; \r
  99         bool                    vsync;\r
 100 \r
 101         configuration()\r
 102                 : name(L"ogl")\r
 103                 , screen_index(0)\r
 104                 , stretch(fill)\r
 105                 , windowed(true)\r
 106                 , auto_deinterlace(true)\r
 107                 , key_only(false)\r
 108                 , aspect(aspect_invalid)\r
 109                 , vsync(false)\r
 110         {\r
 111         }\r
 112 };\r
 113 \r
 114 struct screen_consumer : boost::noncopyable\r
 115 {               \r
 116         const configuration             config_;\r
 117         core::video_format_desc format_desc_;\r
 118         int                                             channel_index_;\r
 119 \r
 120         GLuint                                  texture_;\r
 121         std::vector<GLuint>             pbos_;\r
 122                         \r
 123         float                                   width_;\r
 124         float                                   height_;        \r
 125         int                             screen_x_;\r
 126         int                             screen_y_;\r
 127         int                             screen_width_;\r
 128         int                             screen_height_;\r
 129         int                             square_width_;\r
 130         int                             square_height_;                         \r
 131         \r
 132         sf::Window                              window_;\r
 133         \r
 134         spl::shared_ptr<diagnostics::graph>     graph_;\r
 135         boost::timer                                            perf_timer_;\r
 136         boost::timer                                            tick_timer_;\r
 137 \r
 138         tbb::concurrent_bounded_queue<core::const_frame>        frame_buffer_;\r
 139 \r
 140         boost::thread                   thread_;\r
 141         tbb::atomic<bool>               is_running_;\r
 142         \r
 143         ffmpeg::filter                  filter_;\r
 144 public:\r
 145         screen_consumer(const configuration& config, const core::video_format_desc& format_desc, int channel_index) \r
 146                 : config_(config)\r
 147                 , format_desc_(format_desc)\r
 148                 , channel_index_(channel_index)\r
 149                 , texture_(0)\r
 150                 , pbos_(2, 0)   \r
 151                 , screen_width_(format_desc.width)\r
 152                 , screen_height_(format_desc.height)\r
 153                 , square_width_(format_desc.square_width)\r
 154                 , square_height_(format_desc.square_height)\r
 155                 , 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
 156         {               \r
 157                 if(format_desc_.format == core::video_format::ntsc && config_.aspect == configuration::aspect_4_3)\r
 158                 {\r
 159                         // Use default values which are 4:3.\r
 160                 }\r
 161                 else\r
 162                 {\r
 163                         if(config_.aspect == configuration::aspect_16_9)\r
 164                                 square_width_ = (format_desc.height*16)/9;\r
 165                         else if(config_.aspect == configuration::aspect_4_3)\r
 166                                 square_width_ = (format_desc.height*4)/3;\r
 167                 }\r
 168 \r
 169                 frame_buffer_.set_capacity(2);\r
 170                 \r
 171                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
 172                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));\r
 173                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));\r
 174                 graph_->set_text(print());\r
 175                 diagnostics::register_graph(graph_);\r
 176                                                                         \r
 177                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};                        \r
 178                 std::vector<DISPLAY_DEVICE> displayDevices;\r
 179                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
 180                         displayDevices.push_back(d_device);\r
 181 \r
 182                 if(config_.screen_index >= displayDevices.size())\r
 183                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;\r
 184                 \r
 185                 DEVMODE devmode = {};\r
 186                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 187                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;\r
 188                 \r
 189                 screen_x_               = devmode.dmPosition.x;\r
 190                 screen_y_               = devmode.dmPosition.y;\r
 191                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;\r
 192                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;\r
 193                 \r
 194                 is_running_ = true;\r
 195                 thread_ = boost::thread([this]{run();});\r
 196         }\r
 197         \r
 198         ~screen_consumer()\r
 199         {\r
 200                 is_running_ = false;\r
 201                 frame_buffer_.try_push(core::const_frame::empty());\r
 202                 thread_.join();\r
 203         }\r
 204 \r
 205         void init()\r
 206         {\r
 207                 window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), u8(print()), config_.windowed ? sf::Style::Resize | sf::Style::Close : sf::Style::Fullscreen);\r
 208                 window_.ShowMouseCursor(false);\r
 209                 window_.SetPosition(screen_x_, screen_y_);\r
 210                 window_.SetSize(screen_width_, screen_height_);\r
 211                 window_.SetActive();\r
 212                 \r
 213                 if(!GLEW_VERSION_2_1 && glewInit() != GLEW_OK)\r
 214                         BOOST_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));\r
 215 \r
 216                 if(!GLEW_VERSION_2_1)\r
 217                         BOOST_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));\r
 218 \r
 219                 GL(glEnable(GL_TEXTURE_2D));\r
 220                 GL(glDisable(GL_DEPTH_TEST));           \r
 221                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 222                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 223                 GL(glLoadIdentity());\r
 224                                 \r
 225                 calculate_aspect();\r
 226                         \r
 227                 GL(glGenTextures(1, &texture_));\r
 228                 GL(glBindTexture(GL_TEXTURE_2D, texture_));\r
 229                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));\r
 230                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));\r
 231                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));\r
 232                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));\r
 233                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));\r
 234                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 235                                         \r
 236                 GL(glGenBuffers(2, pbos_.data()));\r
 237                         \r
 238                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 239                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 240                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 241                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 242                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 243                 \r
 244                 auto wglSwapIntervalEXT = reinterpret_cast<void(APIENTRY*)(int)>(wglGetProcAddress("wglSwapIntervalEXT"));\r
 245                 if(wglSwapIntervalEXT)\r
 246                 {\r
 247                         if(config_.vsync)\r
 248                         {\r
 249                                 wglSwapIntervalEXT(1);\r
 250                                 CASPAR_LOG(info) << print() << " Enabled vsync.";\r
 251                         }\r
 252                         else\r
 253                                 wglSwapIntervalEXT(0);\r
 254                 }\r
 255 \r
 256                 CASPAR_LOG(info) << print() << " Successfully Initialized.";\r
 257         }\r
 258 \r
 259         void uninit()\r
 260         {               \r
 261                 if(texture_)\r
 262                         glDeleteTextures(1, &texture_);\r
 263 \r
 264                 BOOST_FOREACH(auto& pbo, pbos_)\r
 265                 {\r
 266                         if(pbo)\r
 267                                 glDeleteBuffers(1, &pbo);\r
 268                 }\r
 269         }\r
 270 \r
 271         void run()\r
 272         {\r
 273                 try\r
 274                 {\r
 275                         init();\r
 276 \r
 277                         while(is_running_)\r
 278                         {                       \r
 279                                 try\r
 280                                 {\r
 281                                         sf::Event e;            \r
 282                                         while(window_.GetEvent(e))\r
 283                                         {\r
 284                                                 if(e.Type == sf::Event::Resized)\r
 285                                                         calculate_aspect();\r
 286                                                 else if(e.Type == sf::Event::Closed)\r
 287                                                         is_running_ = false;\r
 288                                         }\r
 289                         \r
 290                                         auto frame = core::const_frame::empty();\r
 291                                         frame_buffer_.pop(frame);\r
 292                                         \r
 293                                         perf_timer_.restart();\r
 294                                         render(frame);\r
 295                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);    \r
 296 \r
 297                                         window_.Display();\r
 298                                         \r
 299                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);     \r
 300                                         tick_timer_.restart();\r
 301                                 }\r
 302                                 catch(...)\r
 303                                 {\r
 304                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 305                                         is_running_ = false;\r
 306                                 }\r
 307                         }\r
 308 \r
 309                         uninit();\r
 310                 }\r
 311                 catch(...)\r
 312                 {\r
 313                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 314                 }\r
 315         }\r
 316         \r
 317         spl::shared_ptr<AVFrame> get_av_frame()\r
 318         {               \r
 319                 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);      \r
 320                 avcodec_get_frame_defaults(av_frame.get());\r
 321                                                 \r
 322                 av_frame->linesize[0]           = format_desc_.width*4;                 \r
 323                 av_frame->format                        = PIX_FMT_BGRA;\r
 324                 av_frame->width                         = format_desc_.width;\r
 325                 av_frame->height                        = format_desc_.height;\r
 326                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;\r
 327                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;\r
 328 \r
 329                 return av_frame;\r
 330         }\r
 331 \r
 332         void render(core::const_frame frame)\r
 333         {                       \r
 334                 if(static_cast<int>(frame.image_data().size()) != format_desc_.size)\r
 335                         return;\r
 336                                         \r
 337                 auto av_frame = get_av_frame();\r
 338                 av_frame->data[0] = const_cast<uint8_t*>(frame.image_data().begin());\r
 339 \r
 340                 filter_.push(av_frame);\r
 341                 auto frames = filter_.poll_all();\r
 342 \r
 343                 if(frames.empty())\r
 344                         return;\r
 345 \r
 346                 av_frame = frames[0];\r
 347                 \r
 348                 GL(glBindTexture(GL_TEXTURE_2D, texture_));\r
 349 \r
 350                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]));\r
 351                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0));\r
 352 \r
 353                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]));\r
 354                 GL(glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW));\r
 355 \r
 356                 auto ptr = reinterpret_cast<char*>(GL2(glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY)));\r
 357                 if(ptr)\r
 358                 {\r
 359                         if(config_.key_only)\r
 360                         {\r
 361                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)\r
 362                                 {\r
 363                                         for(int n = r.begin(); n != r.end(); ++n)\r
 364                                                 aligned_memshfl(ptr+n*format_desc_.width*4, av_frame->data[0]+n*av_frame->linesize[0], format_desc_.width*4, 0x0F0F0F0F, 0x0B0B0B0B, 0x07070707, 0x03030303);\r
 365                                 });\r
 366                         }\r
 367                         else\r
 368                         {       \r
 369                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)\r
 370                                 {\r
 371                                         for(int n = r.begin(); n != r.end(); ++n)\r
 372                                                 A_memcpy(ptr+n*format_desc_.width*4, av_frame->data[0]+n*av_frame->linesize[0], format_desc_.width*4);\r
 373                                 });\r
 374                         }\r
 375                         \r
 376                         GL(glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER)); // release the mapped buffer\r
 377                 }\r
 378 \r
 379                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0));\r
 380                                 \r
 381                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 382                 glBegin(GL_QUADS);\r
 383                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);\r
 384                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);\r
 385                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);\r
 386                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);\r
 387                 glEnd();\r
 388                 \r
 389                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 390 \r
 391                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 392         }\r
 393 \r
 394         bool send(core::const_frame frame)\r
 395         {\r
 396                 if(!frame_buffer_.try_push(frame))\r
 397                         graph_->set_tag("dropped-frame");\r
 398                 return is_running_;\r
 399         }\r
 400                 \r
 401         std::wstring print() const\r
 402         {       \r
 403                 return config_.name + L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";\r
 404         }\r
 405         \r
 406         void calculate_aspect()\r
 407         {\r
 408                 if(config_.windowed)\r
 409                 {\r
 410                         screen_height_ = window_.GetHeight();\r
 411                         screen_width_ = window_.GetWidth();\r
 412                 }\r
 413                 \r
 414                 GL(glViewport(0, 0, screen_width_, screen_height_));\r
 415 \r
 416                 std::pair<float, float> target_ratio = None();\r
 417                 if(config_.stretch == fill)\r
 418                         target_ratio = Fill();\r
 419                 else if(config_.stretch == uniform)\r
 420                         target_ratio = Uniform();\r
 421                 else if(config_.stretch == uniform_to_fill)\r
 422                         target_ratio = UniformToFill();\r
 423 \r
 424                 width_ = target_ratio.first;\r
 425                 height_ = target_ratio.second;\r
 426         }\r
 427                 \r
 428         std::pair<float, float> None()\r
 429         {\r
 430                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 431                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 432 \r
 433                 return std::make_pair(width, height);\r
 434         }\r
 435 \r
 436         std::pair<float, float> Uniform()\r
 437         {\r
 438                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);\r
 439                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 440                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 441 \r
 442                 return std::make_pair(width, height);\r
 443         }\r
 444 \r
 445         std::pair<float, float> Fill()\r
 446         {\r
 447                 return std::make_pair(1.0f, 1.0f);\r
 448         }\r
 449 \r
 450         std::pair<float, float> UniformToFill()\r
 451         {\r
 452                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 453                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 454                 float r_inv = 1.0f/std::min(wr, hr);\r
 455 \r
 456                 float width = wr*r_inv;\r
 457                 float height = hr*r_inv;\r
 458 \r
 459                 return std::make_pair(width, height);\r
 460         }\r
 461 };\r
 462 \r
 463 \r
 464 struct screen_consumer_proxy : public core::frame_consumer\r
 465 {\r
 466         const configuration config_;\r
 467         std::unique_ptr<screen_consumer> consumer_;\r
 468 \r
 469 public:\r
 470 \r
 471         screen_consumer_proxy(const configuration& config)\r
 472                 : config_(config){}\r
 473         \r
 474         // frame_consumer\r
 475 \r
 476         virtual void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
 477         {\r
 478                 consumer_.reset();\r
 479                 consumer_.reset(new screen_consumer(config_, format_desc, channel_index));\r
 480         }\r
 481         \r
 482         virtual bool send(core::const_frame frame) override\r
 483         {\r
 484                 return consumer_->send(frame);\r
 485         }\r
 486         \r
 487         virtual std::wstring print() const override\r
 488         {\r
 489                 return consumer_ ? consumer_->print() : L"[screen_consumer]";\r
 490         }\r
 491 \r
 492         virtual std::wstring name() const override\r
 493         {\r
 494                 return L"screen";\r
 495         }\r
 496 \r
 497         virtual boost::property_tree::wptree info() const override\r
 498         {\r
 499                 boost::property_tree::wptree info;\r
 500                 info.add(L"type", L"screen");\r
 501                 info.add(L"key-only", config_.key_only);\r
 502                 info.add(L"windowed", config_.windowed);\r
 503                 info.add(L"auto-deinterlace", config_.auto_deinterlace);\r
 504                 return info;\r
 505         }\r
 506 \r
 507         virtual bool has_synchronization_clock() const override\r
 508         {\r
 509                 return false;\r
 510         }\r
 511         \r
 512         virtual int buffer_depth() const override\r
 513         {\r
 514                 return 2;\r
 515         }\r
 516 \r
 517         virtual int index() const override\r
 518         {\r
 519                 return 600;\r
 520         }\r
 521 };      \r
 522 \r
 523 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 524 {\r
 525         if(params.size() < 1 || params[0] != L"SCREEN")\r
 526                 return core::frame_consumer::empty();\r
 527         \r
 528         configuration config;\r
 529                 \r
 530         auto device_it = std::find(params.begin(), params.end(), L"DEVICE");\r
 531         if(device_it != params.end() && ++device_it != params.end())\r
 532                 config.screen_index = boost::lexical_cast<int>(*device_it);\r
 533                 \r
 534         config.key_only = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();\r
 535         config.key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();\r
 536 \r
 537         auto name_it    = std::find(params.begin(), params.end(), L"NAME");\r
 538         if(name_it != params.end() && ++name_it != params.end())\r
 539                 config.name = *name_it;\r
 540 \r
 541         return spl::make_shared<screen_consumer_proxy>(config);\r
 542 }\r
 543 \r
 544 spl::shared_ptr<core::frame_consumer> create_consumer(const boost::property_tree::wptree& ptree) \r
 545 {\r
 546         configuration config;\r
 547         config.name                             = ptree.get(L"name",     config.name);\r
 548         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;\r
 549         config.windowed                 = ptree.get(L"windowed", config.windowed);\r
 550         config.key_only                 = ptree.get(L"key-only", config.key_only);\r
 551         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);\r
 552         config.vsync                    = ptree.get(L"vsync", config.vsync);\r
 553         \r
 554         auto stretch_str = ptree.get(L"stretch", L"default");\r
 555         if(stretch_str == L"uniform")\r
 556                 config.stretch = stretch::uniform;\r
 557         else if(stretch_str == L"uniform_to_fill")\r
 558                 config.stretch = stretch::uniform_to_fill;\r
 559 \r
 560         auto aspect_str = ptree.get(L"aspect-ratio", L"default");\r
 561         if(aspect_str == L"16:9")\r
 562                 config.aspect = configuration::aspect_16_9;\r
 563         else if(aspect_str == L"4:3")\r
 564                 config.aspect = configuration::aspect_4_3;\r
 565         \r
 566         return spl::make_shared<screen_consumer_proxy>(config);\r
 567 }\r
 568 \r
 569 }}