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/memory.h>\r
  31 #include <common/array.h>\r
  32 #include <common/memshfl.h>\r
  33 #include <common/utf.h>\r
  34 #include <common/prec_timer.h>\r
  35 \r
  36 #include <ffmpeg/producer/filter/filter.h>\r
  37 \r
  38 #include <core/video_format.h>\r
  39 #include <core/frame/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/lexical_cast.hpp>\r
  45 #include <boost/foreach.hpp>\r
  46 #include <boost/property_tree/ptree.hpp>\r
  47 #include <boost/thread.hpp>\r
  48 \r
  49 #include <tbb/atomic.h>\r
  50 #include <tbb/concurrent_queue.h>\r
  51 #include <tbb/parallel_for.h>\r
  52 \r
  53 #include <boost/assign.hpp>\r
  54 \r
  55 #include <asmlib.h>\r
  56 \r
  57 #include <algorithm>\r
  58 #include <vector>\r
  59 \r
  60 #if defined(_MSC_VER)\r
  61 #pragma warning (push)\r
  62 #pragma warning (disable : 4244)\r
  63 #endif\r
  64 extern "C" \r
  65 {\r
  66         #define __STDC_CONSTANT_MACROS\r
  67         #define __STDC_LIMIT_MACROS\r
  68         #include <libavcodec/avcodec.h>\r
  69         #include <libavutil/imgutils.h>\r
  70 }\r
  71 #if defined(_MSC_VER)\r
  72 #pragma warning (pop)\r
  73 #endif\r
  74 \r
  75 namespace caspar { namespace screen {\r
  76                 \r
  77 enum stretch\r
  78 {\r
  79         none,\r
  80         uniform,\r
  81         fill,\r
  82         uniform_to_fill\r
  83 };\r
  84 \r
  85 struct configuration\r
  86 {\r
  87         enum aspect_ratio\r
  88         {\r
  89                 aspect_4_3 = 0,\r
  90                 aspect_16_9,\r
  91                 aspect_invalid,\r
  92         };\r
  93                 \r
  94         std::wstring    name;\r
  95         int                             screen_index;\r
  96         stretch                 stretch;\r
  97         bool                    windowed;\r
  98         bool                    auto_deinterlace;\r
  99         bool                    key_only;\r
 100         aspect_ratio    aspect; \r
 101         bool                    vsync;\r
 102 \r
 103         configuration()\r
 104                 : name(L"ogl")\r
 105                 , screen_index(0)\r
 106                 , stretch(fill)\r
 107                 , windowed(true)\r
 108                 , auto_deinterlace(true)\r
 109                 , key_only(false)\r
 110                 , aspect(aspect_invalid)\r
 111                 , vsync(true)\r
 112         {\r
 113         }\r
 114 };\r
 115 \r
 116 struct screen_consumer : boost::noncopyable\r
 117 {               \r
 118         const configuration                                     config_;\r
 119         core::video_format_desc                         format_desc_;\r
 120         int                                                                     channel_index_;\r
 121 \r
 122         GLuint                                                          texture_;\r
 123         std::vector<GLuint>                                     pbos_;\r
 124                         \r
 125         float                                                           width_;\r
 126         float                                                           height_;        \r
 127         int                                                                     screen_x_;\r
 128         int                                                                     screen_y_;\r
 129         int                                                                     screen_width_;\r
 130         int                                                                     screen_height_;\r
 131         int                                                                     square_width_;\r
 132         int                                                                     square_height_;                         \r
 133         \r
 134         sf::Window                                                      window_;\r
 135         \r
 136         spl::shared_ptr<diagnostics::graph>     graph_;\r
 137         boost::timer                                            perf_timer_;\r
 138         boost::timer                                            tick_timer_;\r
 139 \r
 140         caspar::prec_timer                                      wait_timer_;\r
 141 \r
 142         tbb::concurrent_bounded_queue<core::const_frame>        frame_buffer_;\r
 143 \r
 144         boost::thread                                           thread_;\r
 145         tbb::atomic<bool>                                       is_running_;\r
 146         \r
 147         ffmpeg::filter                                          filter_;\r
 148 public:\r
 149         screen_consumer(const configuration& config, const core::video_format_desc& format_desc, int channel_index) \r
 150                 : config_(config)\r
 151                 , format_desc_(format_desc)\r
 152                 , channel_index_(channel_index)\r
 153                 , texture_(0)\r
 154                 , pbos_(2, 0)   \r
 155                 , screen_width_(format_desc.width)\r
 156                 , screen_height_(format_desc.height)\r
 157                 , square_width_(format_desc.square_width)\r
 158                 , square_height_(format_desc.square_height)\r
 159                 , filter_(format_desc.field_mode == core::field_mode::progressive || !config.auto_deinterlace ? L"" : L"YADIF=1:-1", boost::assign::list_of(PIX_FMT_BGRA))\r
 160         {               \r
 161                 if(format_desc_.format == core::video_format::ntsc && config_.aspect == configuration::aspect_4_3)\r
 162                 {\r
 163                         // Use default values which are 4:3.\r
 164                 }\r
 165                 else\r
 166                 {\r
 167                         if(config_.aspect == configuration::aspect_16_9)\r
 168                                 square_width_ = (format_desc.height*16)/9;\r
 169                         else if(config_.aspect == configuration::aspect_4_3)\r
 170                                 square_width_ = (format_desc.height*4)/3;\r
 171                 }\r
 172 \r
 173                 frame_buffer_.set_capacity(2);\r
 174                 \r
 175                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));   \r
 176                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));\r
 177                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));\r
 178                 graph_->set_text(print());\r
 179                 diagnostics::register_graph(graph_);\r
 180                                                                         \r
 181                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};                        \r
 182                 std::vector<DISPLAY_DEVICE> displayDevices;\r
 183                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)\r
 184                         displayDevices.push_back(d_device);\r
 185 \r
 186                 if(config_.screen_index >= displayDevices.size())\r
 187                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;\r
 188                 \r
 189                 DEVMODE devmode = {};\r
 190                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))\r
 191                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;\r
 192                 \r
 193                 screen_x_               = devmode.dmPosition.x;\r
 194                 screen_y_               = devmode.dmPosition.y;\r
 195                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;\r
 196                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;\r
 197                 \r
 198                 is_running_ = true;\r
 199                 thread_ = boost::thread([this]{run();});\r
 200         }\r
 201         \r
 202         ~screen_consumer()\r
 203         {\r
 204                 is_running_ = false;\r
 205                 frame_buffer_.try_push(core::const_frame::empty());\r
 206                 thread_.join();\r
 207         }\r
 208 \r
 209         void init()\r
 210         {\r
 211                 window_.Create(sf::VideoMode(screen_width_, screen_height_, 32), u8(print()), config_.windowed ? sf::Style::Resize | sf::Style::Close : sf::Style::Fullscreen);\r
 212                 window_.ShowMouseCursor(false);\r
 213                 window_.SetPosition(screen_x_, screen_y_);\r
 214                 window_.SetSize(screen_width_, screen_height_);\r
 215                 window_.SetActive();\r
 216                 \r
 217                 if(!GLEW_VERSION_2_1 && glewInit() != GLEW_OK)\r
 218                         CASPAR_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));\r
 219 \r
 220                 if(!GLEW_VERSION_2_1)\r
 221                         CASPAR_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));\r
 222 \r
 223                 GL(glEnable(GL_TEXTURE_2D));\r
 224                 GL(glDisable(GL_DEPTH_TEST));           \r
 225                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));\r
 226                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));\r
 227                 GL(glLoadIdentity());\r
 228                                 \r
 229                 calculate_aspect();\r
 230                         \r
 231                 GL(glGenTextures(1, &texture_));\r
 232                 GL(glBindTexture(GL_TEXTURE_2D, texture_));\r
 233                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));\r
 234                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));\r
 235                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));\r
 236                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));\r
 237                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));\r
 238                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 239                                         \r
 240                 GL(glGenBuffers(2, pbos_.data()));\r
 241                         \r
 242                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);\r
 243                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 244                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);\r
 245                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);\r
 246                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);\r
 247                 \r
 248                 auto wglSwapIntervalEXT = reinterpret_cast<void(APIENTRY*)(int)>(wglGetProcAddress("wglSwapIntervalEXT"));\r
 249                 if(wglSwapIntervalEXT)\r
 250                 {\r
 251                         if(config_.vsync)\r
 252                         {\r
 253                                 wglSwapIntervalEXT(1);\r
 254                                 CASPAR_LOG(info) << print() << " Enabled vsync.";\r
 255                         }\r
 256                         else\r
 257                                 wglSwapIntervalEXT(0);\r
 258                 }\r
 259 \r
 260                 CASPAR_LOG(info) << print() << " Successfully Initialized.";\r
 261         }\r
 262 \r
 263         void uninit()\r
 264         {               \r
 265                 if(texture_)\r
 266                         glDeleteTextures(1, &texture_);\r
 267 \r
 268                 BOOST_FOREACH(auto& pbo, pbos_)\r
 269                 {\r
 270                         if(pbo)\r
 271                                 glDeleteBuffers(1, &pbo);\r
 272                 }\r
 273         }\r
 274 \r
 275         void run()\r
 276         {\r
 277                 try\r
 278                 {\r
 279                         init();\r
 280 \r
 281                         while(is_running_)\r
 282                         {                       \r
 283                                 try\r
 284                                 {\r
 285                                         sf::Event e;            \r
 286                                         while(window_.GetEvent(e))\r
 287                                         {\r
 288                                                 if(e.Type == sf::Event::Resized)\r
 289                                                         calculate_aspect();\r
 290                                                 else if(e.Type == sf::Event::Closed)\r
 291                                                         is_running_ = false;\r
 292                                         }\r
 293                         \r
 294                                         auto frame = core::const_frame::empty();\r
 295                                         frame_buffer_.pop(frame);\r
 296 \r
 297                                         render_and_draw_frame(frame);\r
 298                                         \r
 299                                         /*perf_timer_.restart();\r
 300                                         render(frame);\r
 301                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);    \r
 302 \r
 303                                         window_.Display();*/\r
 304 \r
 305                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);     \r
 306                                         tick_timer_.restart();\r
 307                                 }\r
 308                                 catch(...)\r
 309                                 {\r
 310                                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 311                                         is_running_ = false;\r
 312                                 }\r
 313                         }\r
 314 \r
 315                         uninit();\r
 316                 }\r
 317                 catch(...)\r
 318                 {\r
 319                         CASPAR_LOG_CURRENT_EXCEPTION();\r
 320                 }\r
 321         }\r
 322 \r
 323         void try_sleep_almost_until_vblank()\r
 324         {\r
 325                 static const double THRESHOLD = 0.003;\r
 326                 double threshold = config_.vsync ? THRESHOLD : 0.0;\r
 327 \r
 328                 auto frame_time = 1.0 / (format_desc_.fps * format_desc_.field_count);\r
 329 \r
 330                 wait_timer_.tick(frame_time - threshold);\r
 331         }\r
 332 \r
 333         void wait_for_vblank_and_display()\r
 334         {\r
 335                 try_sleep_almost_until_vblank();\r
 336                 window_.Display();\r
 337                 // Make sure that the next tick measures the duration from this point in time.\r
 338                 wait_timer_.tick(0.0);\r
 339         }\r
 340 \r
 341         spl::shared_ptr<AVFrame> get_av_frame()\r
 342         {               \r
 343                 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);      \r
 344                 avcodec_get_frame_defaults(av_frame.get());\r
 345                                                 \r
 346                 av_frame->linesize[0]           = format_desc_.width*4;                 \r
 347                 av_frame->format                        = PIX_FMT_BGRA;\r
 348                 av_frame->width                         = format_desc_.width;\r
 349                 av_frame->height                        = format_desc_.height;\r
 350                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;\r
 351                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;\r
 352 \r
 353                 return av_frame;\r
 354         }\r
 355 \r
 356         void render_and_draw_frame(core::const_frame frame)\r
 357         {\r
 358                 if(static_cast<size_t>(frame.image_data().size()) != format_desc_.size)\r
 359                         return;\r
 360 \r
 361                 if(screen_width_ == 0 && screen_height_ == 0)\r
 362                         return;\r
 363                                         \r
 364                 perf_timer_.restart();\r
 365                 auto av_frame = get_av_frame();\r
 366                 av_frame->data[0] = const_cast<uint8_t*>(frame.image_data().begin());\r
 367 \r
 368                 filter_.push(av_frame);\r
 369                 auto frames = filter_.poll_all();\r
 370 \r
 371                 if (frames.empty())\r
 372                         return;\r
 373 \r
 374                 if (frames.size() == 1)\r
 375                 {\r
 376                         render(frames[0]);\r
 377                         graph_->set_value("frame-time", perf_timer_.elapsed() * format_desc_.fps * 0.5);\r
 378 \r
 379                         wait_for_vblank_and_display(); // progressive frame\r
 380                 }\r
 381                 else if (frames.size() == 2)\r
 382                 {\r
 383                         render(frames[0]);\r
 384                         double perf_elapsed = perf_timer_.elapsed();\r
 385 \r
 386                         wait_for_vblank_and_display(); // field1\r
 387 \r
 388                         perf_timer_.restart();\r
 389                         render(frames[1]);\r
 390                         perf_elapsed += perf_timer_.elapsed();\r
 391                         graph_->set_value("frame-time", perf_elapsed * format_desc_.fps * 0.5);\r
 392 \r
 393                         wait_for_vblank_and_display(); // field2\r
 394                 }\r
 395         }\r
 396 \r
 397         void render(spl::shared_ptr<AVFrame> av_frame)\r
 398         {\r
 399                 GL(glBindTexture(GL_TEXTURE_2D, texture_));\r
 400 \r
 401                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]));\r
 402                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0));\r
 403 \r
 404                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]));\r
 405                 GL(glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW));\r
 406 \r
 407                 auto ptr = reinterpret_cast<char*>(GL2(glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY)));\r
 408                 if(ptr)\r
 409                 {\r
 410                         if(config_.key_only)\r
 411                         {\r
 412                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)\r
 413                                 {\r
 414                                         for(int n = r.begin(); n != r.end(); ++n)\r
 415                                                 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
 416                                 });\r
 417                         }\r
 418                         else\r
 419                         {       \r
 420                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)\r
 421                                 {\r
 422                                         for(int n = r.begin(); n != r.end(); ++n)\r
 423                                                 A_memcpy(ptr+n*format_desc_.width*4, av_frame->data[0]+n*av_frame->linesize[0], format_desc_.width*4);\r
 424                                 });\r
 425                         }\r
 426                         \r
 427                         GL(glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER)); // release the mapped buffer\r
 428                 }\r
 429 \r
 430                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0));\r
 431                                 \r
 432                 GL(glClear(GL_COLOR_BUFFER_BIT));                       \r
 433                 glBegin(GL_QUADS);\r
 434                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);\r
 435                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);\r
 436                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);\r
 437                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);\r
 438                 glEnd();\r
 439                 \r
 440                 GL(glBindTexture(GL_TEXTURE_2D, 0));\r
 441 \r
 442                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());\r
 443         }\r
 444 \r
 445 \r
 446         bool send(core::const_frame frame)\r
 447         {\r
 448                 if(!frame_buffer_.try_push(frame))\r
 449                         graph_->set_tag("dropped-frame");\r
 450                 return is_running_;\r
 451         }\r
 452                 \r
 453         std::wstring print() const\r
 454         {       \r
 455                 return config_.name + L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";\r
 456         }\r
 457         \r
 458         void calculate_aspect()\r
 459         {\r
 460                 if(config_.windowed)\r
 461                 {\r
 462                         screen_height_ = window_.GetHeight();\r
 463                         screen_width_ = window_.GetWidth();\r
 464                 }\r
 465                 \r
 466                 GL(glViewport(0, 0, screen_width_, screen_height_));\r
 467 \r
 468                 std::pair<float, float> target_ratio = None();\r
 469                 if(config_.stretch == fill)\r
 470                         target_ratio = Fill();\r
 471                 else if(config_.stretch == uniform)\r
 472                         target_ratio = Uniform();\r
 473                 else if(config_.stretch == uniform_to_fill)\r
 474                         target_ratio = UniformToFill();\r
 475 \r
 476                 width_ = target_ratio.first;\r
 477                 height_ = target_ratio.second;\r
 478         }\r
 479                 \r
 480         std::pair<float, float> None()\r
 481         {\r
 482                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 483                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 484 \r
 485                 return std::make_pair(width, height);\r
 486         }\r
 487 \r
 488         std::pair<float, float> Uniform()\r
 489         {\r
 490                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);\r
 491                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));\r
 492                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);\r
 493 \r
 494                 return std::make_pair(width, height);\r
 495         }\r
 496 \r
 497         std::pair<float, float> Fill()\r
 498         {\r
 499                 return std::make_pair(1.0f, 1.0f);\r
 500         }\r
 501 \r
 502         std::pair<float, float> UniformToFill()\r
 503         {\r
 504                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);\r
 505                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);\r
 506                 float r_inv = 1.0f/std::min(wr, hr);\r
 507 \r
 508                 float width = wr*r_inv;\r
 509                 float height = hr*r_inv;\r
 510 \r
 511                 return std::make_pair(width, height);\r
 512         }\r
 513 };\r
 514 \r
 515 \r
 516 struct screen_consumer_proxy : public core::frame_consumer\r
 517 {\r
 518         const configuration config_;\r
 519         std::unique_ptr<screen_consumer> consumer_;\r
 520 \r
 521 public:\r
 522 \r
 523         screen_consumer_proxy(const configuration& config)\r
 524                 : config_(config){}\r
 525         \r
 526         // frame_consumer\r
 527 \r
 528         void initialize(const core::video_format_desc& format_desc, int channel_index) override\r
 529         {\r
 530                 consumer_.reset();\r
 531                 consumer_.reset(new screen_consumer(config_, format_desc, channel_index));\r
 532         }\r
 533         \r
 534         bool send(core::const_frame frame) override\r
 535         {\r
 536                 return consumer_->send(frame);\r
 537         }\r
 538         \r
 539         std::wstring print() const override\r
 540         {\r
 541                 return consumer_ ? consumer_->print() : L"[screen_consumer]";\r
 542         }\r
 543 \r
 544         std::wstring name() const override\r
 545         {\r
 546                 return L"screen";\r
 547         }\r
 548 \r
 549         boost::property_tree::wptree info() const override\r
 550         {\r
 551                 boost::property_tree::wptree info;\r
 552                 info.add(L"type", L"screen");\r
 553                 info.add(L"key-only", config_.key_only);\r
 554                 info.add(L"windowed", config_.windowed);\r
 555                 info.add(L"auto-deinterlace", config_.auto_deinterlace);\r
 556                 return info;\r
 557         }\r
 558 \r
 559         bool has_synchronization_clock() const override\r
 560         {\r
 561                 return false;\r
 562         }\r
 563         \r
 564         int buffer_depth() const override\r
 565         {\r
 566                 return 2;\r
 567         }\r
 568 \r
 569         int index() const override\r
 570         {\r
 571                 return 600 + (config_.key_only ? 10 : 0) + config_.screen_index;\r
 572         }\r
 573 \r
 574         void subscribe(const monitor::observable::observer_ptr& o) override\r
 575         {\r
 576         }\r
 577 \r
 578         void unsubscribe(const monitor::observable::observer_ptr& o) override\r
 579         {\r
 580         }       \r
 581 };      \r
 582 \r
 583 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)\r
 584 {\r
 585         if(params.size() < 1 || params[0] != L"SCREEN")\r
 586                 return core::frame_consumer::empty();\r
 587         \r
 588         configuration config;\r
 589                 \r
 590         if(params.size() > 1)\r
 591                 config.screen_index = boost::lexical_cast<int>(params[1]);\r
 592                 \r
 593         config.key_only = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();\r
 594         config.key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();\r
 595 \r
 596         auto name_it    = std::find(params.begin(), params.end(), L"NAME");\r
 597         if(name_it != params.end() && ++name_it != params.end())\r
 598                 config.name = *name_it;\r
 599 \r
 600         return spl::make_shared<screen_consumer_proxy>(config);\r
 601 }\r
 602 \r
 603 spl::shared_ptr<core::frame_consumer> create_consumer(const boost::property_tree::wptree& ptree) \r
 604 {\r
 605         configuration config;\r
 606         config.name                             = ptree.get(L"name",     config.name);\r
 607         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;\r
 608         config.windowed                 = ptree.get(L"windowed", config.windowed);\r
 609         config.key_only                 = ptree.get(L"key-only", config.key_only);\r
 610         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);\r
 611         config.vsync                    = ptree.get(L"vsync", config.vsync);\r
 612         \r
 613         auto stretch_str = ptree.get(L"stretch", L"default");\r
 614         if(stretch_str == L"uniform")\r
 615                 config.stretch = stretch::uniform;\r
 616         else if(stretch_str == L"uniform_to_fill")\r
 617                 config.stretch = stretch::uniform_to_fill;\r
 618 \r
 619         auto aspect_str = ptree.get(L"aspect-ratio", L"default");\r
 620         if(aspect_str == L"16:9")\r
 621                 config.aspect = configuration::aspect_16_9;\r
 622         else if(aspect_str == L"4:3")\r
 623                 config.aspect = configuration::aspect_4_3;\r
 624         \r
 625         return spl::make_shared<screen_consumer_proxy>(config);\r
 626 }\r
 627 \r
 628 }}