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