git.sesse.net Git - casparcg/blob - modules/screen/consumer/screen_consumer.cpp

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "screen_consumer.h"
  23
  24 #include <GL/glew.h>
  25 #include <SFML/Window.hpp>
  26
  27 #include <common/diagnostics/graph.h>
  28 #include <common/gl/gl_check.h>
  29 #include <common/log.h>
  30 #include <common/memory.h>
  31 #include <common/array.h>
  32 #include <common/memshfl.h>
  33 #include <common/utf.h>
  34 #include <common/prec_timer.h>
  35 #include <common/future.h>
  36
  37 #include <windows.h>
  38
  39 #include <ffmpeg/producer/filter/filter.h>
  40
  41 #include <core/video_format.h>
  42 #include <core/frame/frame.h>
  43 #include <core/consumer/frame_consumer.h>
  44 #include <core/interaction/interaction_sink.h>
  45
  46 #include <boost/timer.hpp>
  47 #include <boost/circular_buffer.hpp>
  48 #include <boost/lexical_cast.hpp>
  49 #include <boost/property_tree/ptree.hpp>
  50 #include <boost/thread.hpp>
  51
  52 #include <tbb/atomic.h>
  53 #include <tbb/concurrent_queue.h>
  54 #include <tbb/parallel_for.h>
  55
  56 #include <asmlib.h>
  57
  58 #include <algorithm>
  59 #include <vector>
  60
  61 #if defined(_MSC_VER)
  62 #pragma warning (push)
  63 #pragma warning (disable : 4244)
  64 #endif
  65 extern "C"
  66 {
  67         #define __STDC_CONSTANT_MACROS
  68         #define __STDC_LIMIT_MACROS
  69         #include <libavcodec/avcodec.h>
  70         #include <libavutil/imgutils.h>
  71 }
  72 #if defined(_MSC_VER)
  73 #pragma warning (pop)
  74 #endif
  75
  76 namespace caspar { namespace screen {
  77
  78 enum class stretch
  79 {
  80         none,
  81         uniform,
  82         fill,
  83         uniform_to_fill
  84 };
  85
  86 struct configuration
  87 {
  88         enum class aspect_ratio
  89         {
  90                 aspect_4_3 = 0,
  91                 aspect_16_9,
  92                 aspect_invalid,
  93         };
  94
  95         std::wstring    name                            = L"ogl";
  96         int                             screen_index            = 0;
  97         stretch                 stretch                         = stretch::fill;
  98         bool                    windowed                        = true;
  99         bool                    auto_deinterlace        = true;
 100         bool                    key_only                        = false;
 101         aspect_ratio    aspect                          = aspect_ratio::aspect_invalid;
 102         bool                    vsync                           = true;
 103         bool                    interactive                     = true;
 104 };
 105
 106 struct screen_consumer : boost::noncopyable
 107 {
 108         const configuration                                                                     config_;
 109         core::video_format_desc                                                         format_desc_;
 110         int                                                                                                     channel_index_;
 111
 112         GLuint                                                                                          texture_                = 0;
 113         std::vector<GLuint>                                                                     pbos_                   = std::vector<GLuint> { 0, 0 };
 114
 115         float                                                                                           width_;
 116         float                                                                                           height_;
 117         int                                                                                                     screen_x_;
 118         int                                                                                                     screen_y_;
 119         int                                                                                                     screen_width_   = format_desc_.width;
 120         int                                                                                                     screen_height_  = format_desc_.height;
 121         int                                                                                                     square_width_   = format_desc_.square_width;
 122         int                                                                                                     square_height_  = format_desc_.square_height;
 123
 124         sf::Window                                                                                      window_;
 125
 126         spl::shared_ptr<diagnostics::graph>                                     graph_;
 127         boost::timer                                                                            perf_timer_;
 128         boost::timer                                                                            tick_timer_;
 129
 130         caspar::prec_timer                                                                      wait_timer_;
 131
 132         tbb::concurrent_bounded_queue<core::const_frame>        frame_buffer_;
 133         core::interaction_sink*                                                         sink_;
 134
 135         boost::thread                                                                           thread_;
 136         tbb::atomic<bool>                                                                       is_running_;
 137
 138         ffmpeg::filter                                                                          filter_;
 139 public:
 140         screen_consumer(
 141                         const configuration& config,
 142                         const core::video_format_desc& format_desc,
 143                         int channel_index,
 144                         core::interaction_sink* sink)
 145                 : config_(config)
 146                 , format_desc_(format_desc)
 147                 , channel_index_(channel_index)
 148                 , sink_(sink)
 149                 , filter_([&]() -> ffmpeg::filter
 150                 {
 151                         const auto sample_aspect_ratio =
 152                                 boost::rational<int>(
 153                                         format_desc.square_width,
 154                                         format_desc.square_height) /
 155                                 boost::rational<int>(
 156                                         format_desc.width,
 157                                         format_desc.height);
 158
 159                         return ffmpeg::filter(
 160                                 format_desc.width,
 161                                 format_desc.height,
 162                                 boost::rational<int>(format_desc.duration, format_desc.time_scale),
 163                                 boost::rational<int>(format_desc.time_scale, format_desc.duration),
 164                                 sample_aspect_ratio,
 165                                 AV_PIX_FMT_BGRA,
 166                                 { AV_PIX_FMT_BGRA },
 167                                 format_desc.field_mode == core::field_mode::progressive || !config.auto_deinterlace ? "" : "YADIF=1:-1");
 168                 }())
 169         {
 170                 if (format_desc_.format == core::video_format::ntsc && config_.aspect == configuration::aspect_ratio::aspect_4_3)
 171                 {
 172                         // Use default values which are 4:3.
 173                 }
 174                 else
 175                 {
 176                         if (config_.aspect == configuration::aspect_ratio::aspect_16_9)
 177                                 square_width_ = (format_desc.height*16)/9;
 178                         else if (config_.aspect == configuration::aspect_ratio::aspect_4_3)
 179                                 square_width_ = (format_desc.height*4)/3;
 180                 }
 181
 182                 frame_buffer_.set_capacity(1);
 183
 184                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));
 185                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));
 186                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));
 187                 graph_->set_text(print());
 188                 diagnostics::register_graph(graph_);
 189
 190                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};
 191                 std::vector<DISPLAY_DEVICE> displayDevices;
 192                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)
 193                         displayDevices.push_back(d_device);
 194
 195                 if(config_.screen_index >= displayDevices.size())
 196                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;
 197
 198                 DEVMODE devmode = {};
 199                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))
 200                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;
 201
 202                 screen_x_               = devmode.dmPosition.x;
 203                 screen_y_               = devmode.dmPosition.y;
 204                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;
 205                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;
 206
 207                 is_running_ = true;
 208                 thread_ = boost::thread([this]{run();});
 209         }
 210
 211         ~screen_consumer()
 212         {
 213                 is_running_ = false;
 214                 frame_buffer_.try_push(core::const_frame::empty());
 215                 thread_.join();
 216         }
 217
 218         void init()
 219         {
 220                 window_.create(sf::VideoMode(screen_width_, screen_height_, 32), u8(L"Screen consumer " + channel_and_format()), config_.windowed ? sf::Style::Resize | sf::Style::Close : sf::Style::Fullscreen);
 221                 window_.setMouseCursorVisible(config_.interactive);
 222                 window_.setPosition(sf::Vector2i(screen_x_, screen_y_));
 223                 window_.setSize(sf::Vector2u(screen_width_, screen_height_));
 224                 window_.setActive();
 225
 226                 if(!GLEW_VERSION_2_1 && glewInit() != GLEW_OK)
 227                         CASPAR_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));
 228
 229                 if(!GLEW_VERSION_2_1)
 230                         CASPAR_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));
 231
 232                 GL(glEnable(GL_TEXTURE_2D));
 233                 GL(glDisable(GL_DEPTH_TEST));
 234                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));
 235                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));
 236                 GL(glLoadIdentity());
 237
 238                 calculate_aspect();
 239
 240                 GL(glGenTextures(1, &texture_));
 241                 GL(glBindTexture(GL_TEXTURE_2D, texture_));
 242                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
 243                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
 244                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));
 245                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));
 246                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));
 247                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 248
 249                 GL(glGenBuffers(2, pbos_.data()));
 250
 251                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);
 252                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
 253                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);
 254                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
 255                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
 256
 257                 auto wglSwapIntervalEXT = reinterpret_cast<void(APIENTRY*)(int)>(wglGetProcAddress("wglSwapIntervalEXT"));
 258                 if(wglSwapIntervalEXT)
 259                 {
 260                         if(config_.vsync)
 261                         {
 262                                 wglSwapIntervalEXT(1);
 263                                 CASPAR_LOG(info) << print() << " Enabled vsync.";
 264                         }
 265                         else
 266                                 wglSwapIntervalEXT(0);
 267                 }
 268
 269                 CASPAR_LOG(info) << print() << " Successfully Initialized.";
 270         }
 271
 272         void uninit()
 273         {
 274                 if(texture_)
 275                         glDeleteTextures(1, &texture_);
 276
 277                 for (auto& pbo : pbos_)
 278                 {
 279                         if(pbo)
 280                                 glDeleteBuffers(1, &pbo);
 281                 }
 282         }
 283
 284         void run()
 285         {
 286                 try
 287                 {
 288                         init();
 289
 290                         while(is_running_)
 291                         {
 292                                 try
 293                                 {
 294                                         sf::Event e;
 295                                         while(window_.pollEvent(e))
 296                                         {
 297                                                 if (e.type == sf::Event::Resized)
 298                                                         calculate_aspect();
 299                                                 else if (e.type == sf::Event::Closed)
 300                                                         is_running_ = false;
 301                                                 else if (config_.interactive && sink_)
 302                                                 {
 303                                                         switch (e.type)
 304                                                         {
 305                                                         case sf::Event::MouseMoved:
 306                                                                 {
 307                                                                         auto& mouse_move = e.mouseMove;
 308                                                                         sink_->on_interaction(spl::make_shared<core::mouse_move_event>(
 309                                                                                         1,
 310                                                                                         static_cast<double>(mouse_move.x) / screen_width_,
 311                                                                                         static_cast<double>(mouse_move.y) / screen_height_));
 312                                                                 }
 313                                                                 break;
 314                                                         case sf::Event::MouseButtonPressed:
 315                                                         case sf::Event::MouseButtonReleased:
 316                                                                 {
 317                                                                         auto& mouse_button = e.mouseButton;
 318                                                                         sink_->on_interaction(spl::make_shared<core::mouse_button_event>(
 319                                                                                         1,
 320                                                                                         static_cast<double>(mouse_button.x) / screen_width_,
 321                                                                                         static_cast<double>(mouse_button.y) / screen_height_,
 322                                                                                         static_cast<int>(mouse_button.button),
 323                                                                                         e.type == sf::Event::MouseButtonPressed));
 324                                                                 }
 325                                                                 break;
 326                                                         }
 327                                                 }
 328                                         }
 329
 330                                         auto frame = core::const_frame::empty();
 331                                         frame_buffer_.pop(frame);
 332
 333                                         render_and_draw_frame(frame);
 334
 335                                         /*perf_timer_.restart();
 336                                         render(frame);
 337                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);
 338
 339                                         window_.Display();*/
 340
 341                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);
 342                                         tick_timer_.restart();
 343                                 }
 344                                 catch(...)
 345                                 {
 346                                         CASPAR_LOG_CURRENT_EXCEPTION();
 347                                         is_running_ = false;
 348                                 }
 349                         }
 350
 351                         uninit();
 352                 }
 353                 catch(...)
 354                 {
 355                         CASPAR_LOG_CURRENT_EXCEPTION();
 356                 }
 357         }
 358
 359         void try_sleep_almost_until_vblank()
 360         {
 361                 static const double THRESHOLD = 0.003;
 362                 double threshold = config_.vsync ? THRESHOLD : 0.0;
 363
 364                 auto frame_time = 1.0 / (format_desc_.fps * format_desc_.field_count);
 365
 366                 wait_timer_.tick(frame_time - threshold);
 367         }
 368
 369         void wait_for_vblank_and_display()
 370         {
 371                 try_sleep_almost_until_vblank();
 372                 window_.display();
 373                 // Make sure that the next tick measures the duration from this point in time.
 374                 wait_timer_.tick(0.0);
 375         }
 376
 377         spl::shared_ptr<AVFrame> get_av_frame()
 378         {
 379                 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);
 380                 avcodec_get_frame_defaults(av_frame.get());
 381
 382                 av_frame->linesize[0]           = format_desc_.width*4;
 383                 av_frame->format                        = PIX_FMT_BGRA;
 384                 av_frame->width                         = format_desc_.width;
 385                 av_frame->height                        = format_desc_.height;
 386                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;
 387                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;
 388
 389                 return av_frame;
 390         }
 391
 392         void render_and_draw_frame(core::const_frame frame)
 393         {
 394                 if(static_cast<size_t>(frame.image_data().size()) != format_desc_.size)
 395                         return;
 396
 397                 if(screen_width_ == 0 && screen_height_ == 0)
 398                         return;
 399
 400                 perf_timer_.restart();
 401                 auto av_frame = get_av_frame();
 402                 av_frame->data[0] = const_cast<uint8_t*>(frame.image_data().begin());
 403
 404                 filter_.push(av_frame);
 405                 auto frames = filter_.poll_all();
 406
 407                 if (frames.empty())
 408                         return;
 409
 410                 if (frames.size() == 1)
 411                 {
 412                         render(frames[0]);
 413                         graph_->set_value("frame-time", perf_timer_.elapsed() * format_desc_.fps * 0.5);
 414
 415                         wait_for_vblank_and_display(); // progressive frame
 416                 }
 417                 else if (frames.size() == 2)
 418                 {
 419                         render(frames[0]);
 420                         double perf_elapsed = perf_timer_.elapsed();
 421
 422                         wait_for_vblank_and_display(); // field1
 423
 424                         perf_timer_.restart();
 425                         render(frames[1]);
 426                         perf_elapsed += perf_timer_.elapsed();
 427                         graph_->set_value("frame-time", perf_elapsed * format_desc_.fps * 0.5);
 428
 429                         wait_for_vblank_and_display(); // field2
 430                 }
 431         }
 432
 433         void render(spl::shared_ptr<AVFrame> av_frame)
 434         {
 435                 GL(glBindTexture(GL_TEXTURE_2D, texture_));
 436
 437                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]));
 438                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0));
 439
 440                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]));
 441                 GL(glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW));
 442
 443                 auto ptr = reinterpret_cast<char*>(GL2(glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY)));
 444                 if(ptr)
 445                 {
 446                         if(config_.key_only)
 447                         {
 448                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)
 449                                 {
 450                                         for(int n = r.begin(); n != r.end(); ++n)
 451                                                 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);
 452                                 });
 453                         }
 454                         else
 455                         {
 456                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)
 457                                 {
 458                                         for(int n = r.begin(); n != r.end(); ++n)
 459                                                 A_memcpy(ptr+n*format_desc_.width*4, av_frame->data[0]+n*av_frame->linesize[0], format_desc_.width*4);
 460                                 });
 461                         }
 462
 463                         GL(glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER)); // release the mapped buffer
 464                 }
 465
 466                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0));
 467
 468                 GL(glClear(GL_COLOR_BUFFER_BIT));
 469                 glBegin(GL_QUADS);
 470                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);
 471                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);
 472                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);
 473                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);
 474                 glEnd();
 475
 476                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 477
 478                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());
 479         }
 480
 481
 482         std::future<bool> send(core::const_frame frame)
 483         {
 484                 if(!frame_buffer_.try_push(frame))
 485                         graph_->set_tag("dropped-frame");
 486
 487                 return make_ready_future(is_running_.load());
 488         }
 489
 490         std::wstring channel_and_format() const
 491         {
 492                 return L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";
 493         }
 494
 495         std::wstring print() const
 496         {
 497                 return config_.name + channel_and_format();
 498         }
 499
 500         void calculate_aspect()
 501         {
 502                 if(config_.windowed)
 503                 {
 504                         screen_height_ = window_.getSize().y;
 505                         screen_width_ = window_.getSize().x;
 506                 }
 507
 508                 GL(glViewport(0, 0, screen_width_, screen_height_));
 509
 510                 std::pair<float, float> target_ratio = None();
 511                 if (config_.stretch == stretch::fill)
 512                         target_ratio = Fill();
 513                 else if (config_.stretch == stretch::uniform)
 514                         target_ratio = Uniform();
 515                 else if (config_.stretch == stretch::uniform_to_fill)
 516                         target_ratio = UniformToFill();
 517
 518                 width_ = target_ratio.first;
 519                 height_ = target_ratio.second;
 520         }
 521
 522         std::pair<float, float> None()
 523         {
 524                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
 525                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
 526
 527                 return std::make_pair(width, height);
 528         }
 529
 530         std::pair<float, float> Uniform()
 531         {
 532                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);
 533                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));
 534                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);
 535
 536                 return std::make_pair(width, height);
 537         }
 538
 539         std::pair<float, float> Fill()
 540         {
 541                 return std::make_pair(1.0f, 1.0f);
 542         }
 543
 544         std::pair<float, float> UniformToFill()
 545         {
 546                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
 547                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
 548                 float r_inv = 1.0f/std::min(wr, hr);
 549
 550                 float width = wr*r_inv;
 551                 float height = hr*r_inv;
 552
 553                 return std::make_pair(width, height);
 554         }
 555 };
 556
 557
 558 struct screen_consumer_proxy : public core::frame_consumer
 559 {
 560         core::monitor::subject                          monitor_subject_;
 561         const configuration                                     config_;
 562         std::unique_ptr<screen_consumer>        consumer_;
 563         core::interaction_sink*                         sink_;
 564
 565 public:
 566
 567         screen_consumer_proxy(const configuration& config, core::interaction_sink* sink)
 568                 : config_(config)
 569                 , sink_(sink)
 570         {
 571         }
 572
 573         // frame_consumer
 574
 575         void initialize(const core::video_format_desc& format_desc, int channel_index) override
 576         {
 577                 consumer_.reset();
 578                 consumer_.reset(new screen_consumer(config_, format_desc, channel_index, sink_));
 579         }
 580
 581         std::future<bool> send(core::const_frame frame) override
 582         {
 583                 return consumer_->send(frame);
 584         }
 585
 586         std::wstring print() const override
 587         {
 588                 return consumer_ ? consumer_->print() : L"[screen_consumer]";
 589         }
 590
 591         std::wstring name() const override
 592         {
 593                 return L"screen";
 594         }
 595
 596         boost::property_tree::wptree info() const override
 597         {
 598                 boost::property_tree::wptree info;
 599                 info.add(L"type", L"screen");
 600                 info.add(L"key-only", config_.key_only);
 601                 info.add(L"windowed", config_.windowed);
 602                 info.add(L"auto-deinterlace", config_.auto_deinterlace);
 603                 return info;
 604         }
 605
 606         bool has_synchronization_clock() const override
 607         {
 608                 return false;
 609         }
 610
 611         int buffer_depth() const override
 612         {
 613                 return 1;
 614         }
 615
 616         int index() const override
 617         {
 618                 return 600 + (config_.key_only ? 10 : 0) + config_.screen_index;
 619         }
 620
 621         core::monitor::subject& monitor_output()
 622         {
 623                 return monitor_subject_;
 624         }
 625 };
 626
 627 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params, core::interaction_sink* sink)
 628 {
 629         if(params.size() < 1 || params[0] != L"SCREEN")
 630                 return core::frame_consumer::empty();
 631
 632         configuration config;
 633
 634         if(params.size() > 1)
 635                 config.screen_index = boost::lexical_cast<int>(params[1]);
 636
 637         config.windowed         = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();
 638         config.key_only         = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();
 639         config.interactive      = std::find(params.begin(), params.end(), L"INTERACTIVE") != params.end();
 640
 641         auto name_it    = std::find(params.begin(), params.end(), L"NAME");
 642         if(name_it != params.end() && ++name_it != params.end())
 643                 config.name = *name_it;
 644
 645         return spl::make_shared<screen_consumer_proxy>(config, sink);
 646 }
 647
 648 spl::shared_ptr<core::frame_consumer> create_preconfigured_consumer(const boost::property_tree::wptree& ptree, core::interaction_sink* sink)
 649 {
 650         configuration config;
 651         config.name                             = ptree.get(L"name",     config.name);
 652         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;
 653         config.windowed                 = ptree.get(L"windowed", config.windowed);
 654         config.key_only                 = ptree.get(L"key-only", config.key_only);
 655         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);
 656         config.vsync                    = ptree.get(L"vsync", config.vsync);
 657
 658         auto stretch_str = ptree.get(L"stretch", L"default");
 659         if(stretch_str == L"uniform")
 660                 config.stretch = stretch::uniform;
 661         else if(stretch_str == L"uniform_to_fill")
 662                 config.stretch = stretch::uniform_to_fill;
 663
 664         auto aspect_str = ptree.get(L"aspect-ratio", L"default");
 665         if(aspect_str == L"16:9")
 666                 config.aspect = configuration::aspect_ratio::aspect_16_9;
 667         else if(aspect_str == L"4:3")
 668                 config.aspect = configuration::aspect_ratio::aspect_4_3;
 669
 670         return spl::make_shared<screen_consumer_proxy>(config, sink);
 671 }
 672
 673 }}