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
  45 #include <boost/timer.hpp>
  46 #include <boost/circular_buffer.hpp>
  47 #include <boost/lexical_cast.hpp>
  48 #include <boost/property_tree/ptree.hpp>
  49 #include <boost/thread.hpp>
  50
  51 #include <tbb/atomic.h>
  52 #include <tbb/concurrent_queue.h>
  53 #include <tbb/parallel_for.h>
  54
  55 #include <asmlib.h>
  56
  57 #include <algorithm>
  58 #include <vector>
  59
  60 #if defined(_MSC_VER)
  61 #pragma warning (push)
  62 #pragma warning (disable : 4244)
  63 #endif
  64 extern "C"
  65 {
  66         #define __STDC_CONSTANT_MACROS
  67         #define __STDC_LIMIT_MACROS
  68         #include <libavcodec/avcodec.h>
  69         #include <libavutil/imgutils.h>
  70 }
  71 #if defined(_MSC_VER)
  72 #pragma warning (pop)
  73 #endif
  74
  75 namespace caspar { namespace screen {
  76
  77 enum stretch
  78 {
  79         none,
  80         uniform,
  81         fill,
  82         uniform_to_fill
  83 };
  84
  85 struct configuration
  86 {
  87         enum aspect_ratio
  88         {
  89                 aspect_4_3 = 0,
  90                 aspect_16_9,
  91                 aspect_invalid,
  92         };
  93
  94         std::wstring    name;
  95         int                             screen_index;
  96         stretch                 stretch;
  97         bool                    windowed;
  98         bool                    auto_deinterlace;
  99         bool                    key_only;
 100         aspect_ratio    aspect;
 101         bool                    vsync;
 102         bool                    interactive;
 103
 104         configuration()
 105                 : name(L"ogl")
 106                 , screen_index(0)
 107                 , stretch(fill)
 108                 , windowed(true)
 109                 , auto_deinterlace(true)
 110                 , key_only(false)
 111                 , aspect(aspect_invalid)
 112                 , vsync(true)
 113                 , interactive(true)
 114         {
 115         }
 116 };
 117
 118 struct screen_consumer : boost::noncopyable
 119 {
 120         const configuration                                                                     config_;
 121         core::video_format_desc                                                         format_desc_;
 122         int                                                                                                     channel_index_;
 123
 124         GLuint                                                                                          texture_;
 125         std::vector<GLuint>                                                                     pbos_;
 126
 127         float                                                                                           width_;
 128         float                                                                                           height_;
 129         int                                                                                                     screen_x_;
 130         int                                                                                                     screen_y_;
 131         int                                                                                                     screen_width_;
 132         int                                                                                                     screen_height_;
 133         int                                                                                                     square_width_;
 134         int                                                                                                     square_height_;
 135
 136         sf::Window                                                                                      window_;
 137
 138         spl::shared_ptr<diagnostics::graph>                                     graph_;
 139         boost::timer                                                                            perf_timer_;
 140         boost::timer                                                                            tick_timer_;
 141
 142         caspar::prec_timer                                                                      wait_timer_;
 143
 144         tbb::concurrent_bounded_queue<core::const_frame>        frame_buffer_;
 145         core::interaction_sink*                                                         sink_;
 146
 147         boost::thread                                                                           thread_;
 148         tbb::atomic<bool>                                                                       is_running_;
 149
 150         ffmpeg::filter                                                                          filter_;
 151 public:
 152         screen_consumer(
 153                         const configuration& config,
 154                         const core::video_format_desc& format_desc,
 155                         int channel_index,
 156                         core::interaction_sink* sink)
 157                 : config_(config)
 158                 , format_desc_(format_desc)
 159                 , channel_index_(channel_index)
 160                 , texture_(0)
 161                 , pbos_(2, 0)
 162                 , screen_width_(format_desc.width)
 163                 , screen_height_(format_desc.height)
 164                 , square_width_(format_desc.square_width)
 165                 , square_height_(format_desc.square_height)
 166                 , sink_(sink)
 167                 , filter_([&]() -> ffmpeg::filter
 168                 {
 169                         const auto sample_aspect_ratio =
 170                                 boost::rational<int>(
 171                                         format_desc.square_width,
 172                                         format_desc.square_height) /
 173                                 boost::rational<int>(
 174                                         format_desc.width,
 175                                         format_desc.height);
 176
 177                         return ffmpeg::filter(
 178                                 format_desc.width,
 179                                 format_desc.height,
 180                                 boost::rational<int>(format_desc.duration, format_desc.time_scale),
 181                                 boost::rational<int>(format_desc.time_scale, format_desc.duration),
 182                                 sample_aspect_ratio,
 183                                 AV_PIX_FMT_BGRA,
 184                                 { AV_PIX_FMT_BGRA },
 185                                 format_desc.field_mode == core::field_mode::progressive || !config.auto_deinterlace ? "" : "YADIF=1:-1");
 186                 }())
 187         {
 188                 if(format_desc_.format == core::video_format::ntsc && config_.aspect == configuration::aspect_4_3)
 189                 {
 190                         // Use default values which are 4:3.
 191                 }
 192                 else
 193                 {
 194                         if(config_.aspect == configuration::aspect_16_9)
 195                                 square_width_ = (format_desc.height*16)/9;
 196                         else if(config_.aspect == configuration::aspect_4_3)
 197                                 square_width_ = (format_desc.height*4)/3;
 198                 }
 199
 200                 frame_buffer_.set_capacity(1);
 201
 202                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));
 203                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));
 204                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));
 205                 graph_->set_text(print());
 206                 diagnostics::register_graph(graph_);
 207
 208                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};
 209                 std::vector<DISPLAY_DEVICE> displayDevices;
 210                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)
 211                         displayDevices.push_back(d_device);
 212
 213                 if(config_.screen_index >= displayDevices.size())
 214                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;
 215
 216                 DEVMODE devmode = {};
 217                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))
 218                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;
 219
 220                 screen_x_               = devmode.dmPosition.x;
 221                 screen_y_               = devmode.dmPosition.y;
 222                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;
 223                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;
 224
 225                 is_running_ = true;
 226                 thread_ = boost::thread([this]{run();});
 227         }
 228
 229         ~screen_consumer()
 230         {
 231                 is_running_ = false;
 232                 frame_buffer_.try_push(core::const_frame::empty());
 233                 thread_.join();
 234         }
 235
 236         void init()
 237         {
 238                 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);
 239                 window_.setMouseCursorVisible(config_.interactive);
 240                 window_.setPosition(sf::Vector2i(screen_x_, screen_y_));
 241                 window_.setSize(sf::Vector2u(screen_width_, screen_height_));
 242                 window_.setActive();
 243
 244                 if(!GLEW_VERSION_2_1 && glewInit() != GLEW_OK)
 245                         CASPAR_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));
 246
 247                 if(!GLEW_VERSION_2_1)
 248                         CASPAR_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));
 249
 250                 GL(glEnable(GL_TEXTURE_2D));
 251                 GL(glDisable(GL_DEPTH_TEST));
 252                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));
 253                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));
 254                 GL(glLoadIdentity());
 255
 256                 calculate_aspect();
 257
 258                 GL(glGenTextures(1, &texture_));
 259                 GL(glBindTexture(GL_TEXTURE_2D, texture_));
 260                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
 261                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
 262                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));
 263                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));
 264                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));
 265                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 266
 267                 GL(glGenBuffers(2, pbos_.data()));
 268
 269                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);
 270                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
 271                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);
 272                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
 273                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
 274
 275                 auto wglSwapIntervalEXT = reinterpret_cast<void(APIENTRY*)(int)>(wglGetProcAddress("wglSwapIntervalEXT"));
 276                 if(wglSwapIntervalEXT)
 277                 {
 278                         if(config_.vsync)
 279                         {
 280                                 wglSwapIntervalEXT(1);
 281                                 CASPAR_LOG(info) << print() << " Enabled vsync.";
 282                         }
 283                         else
 284                                 wglSwapIntervalEXT(0);
 285                 }
 286
 287                 CASPAR_LOG(info) << print() << " Successfully Initialized.";
 288         }
 289
 290         void uninit()
 291         {
 292                 if(texture_)
 293                         glDeleteTextures(1, &texture_);
 294
 295                 for (auto& pbo : pbos_)
 296                 {
 297                         if(pbo)
 298                                 glDeleteBuffers(1, &pbo);
 299                 }
 300         }
 301
 302         void run()
 303         {
 304                 try
 305                 {
 306                         init();
 307
 308                         while(is_running_)
 309                         {
 310                                 try
 311                                 {
 312                                         sf::Event e;
 313                                         while(window_.pollEvent(e))
 314                                         {
 315                                                 if (e.type == sf::Event::Resized)
 316                                                         calculate_aspect();
 317                                                 else if (e.type == sf::Event::Closed)
 318                                                         is_running_ = false;
 319                                                 else if (config_.interactive && sink_)
 320                                                 {
 321                                                         switch (e.type)
 322                                                         {
 323                                                         case sf::Event::MouseMoved:
 324                                                                 {
 325                                                                         auto& mouse_move = e.mouseMove;
 326                                                                         sink_->on_interaction(spl::make_shared<core::mouse_move_event>(
 327                                                                                         1,
 328                                                                                         static_cast<double>(mouse_move.x) / screen_width_,
 329                                                                                         static_cast<double>(mouse_move.y) / screen_height_));
 330                                                                 }
 331                                                                 break;
 332                                                         case sf::Event::MouseButtonPressed:
 333                                                         case sf::Event::MouseButtonReleased:
 334                                                                 {
 335                                                                         auto& mouse_button = e.mouseButton;
 336                                                                         sink_->on_interaction(spl::make_shared<core::mouse_button_event>(
 337                                                                                         1,
 338                                                                                         static_cast<double>(mouse_button.x) / screen_width_,
 339                                                                                         static_cast<double>(mouse_button.y) / screen_height_,
 340                                                                                         static_cast<int>(mouse_button.button),
 341                                                                                         e.type == sf::Event::MouseButtonPressed));
 342                                                                 }
 343                                                                 break;
 344                                                         }
 345                                                 }
 346                                         }
 347
 348                                         auto frame = core::const_frame::empty();
 349                                         frame_buffer_.pop(frame);
 350
 351                                         render_and_draw_frame(frame);
 352
 353                                         /*perf_timer_.restart();
 354                                         render(frame);
 355                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);
 356
 357                                         window_.Display();*/
 358
 359                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);
 360                                         tick_timer_.restart();
 361                                 }
 362                                 catch(...)
 363                                 {
 364                                         CASPAR_LOG_CURRENT_EXCEPTION();
 365                                         is_running_ = false;
 366                                 }
 367                         }
 368
 369                         uninit();
 370                 }
 371                 catch(...)
 372                 {
 373                         CASPAR_LOG_CURRENT_EXCEPTION();
 374                 }
 375         }
 376
 377         void try_sleep_almost_until_vblank()
 378         {
 379                 static const double THRESHOLD = 0.003;
 380                 double threshold = config_.vsync ? THRESHOLD : 0.0;
 381
 382                 auto frame_time = 1.0 / (format_desc_.fps * format_desc_.field_count);
 383
 384                 wait_timer_.tick(frame_time - threshold);
 385         }
 386
 387         void wait_for_vblank_and_display()
 388         {
 389                 try_sleep_almost_until_vblank();
 390                 window_.display();
 391                 // Make sure that the next tick measures the duration from this point in time.
 392                 wait_timer_.tick(0.0);
 393         }
 394
 395         spl::shared_ptr<AVFrame> get_av_frame()
 396         {
 397                 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);
 398                 avcodec_get_frame_defaults(av_frame.get());
 399
 400                 av_frame->linesize[0]           = format_desc_.width*4;
 401                 av_frame->format                        = PIX_FMT_BGRA;
 402                 av_frame->width                         = format_desc_.width;
 403                 av_frame->height                        = format_desc_.height;
 404                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;
 405                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;
 406
 407                 return av_frame;
 408         }
 409
 410         void render_and_draw_frame(core::const_frame frame)
 411         {
 412                 if(static_cast<size_t>(frame.image_data().size()) != format_desc_.size)
 413                         return;
 414
 415                 if(screen_width_ == 0 && screen_height_ == 0)
 416                         return;
 417
 418                 perf_timer_.restart();
 419                 auto av_frame = get_av_frame();
 420                 av_frame->data[0] = const_cast<uint8_t*>(frame.image_data().begin());
 421
 422                 filter_.push(av_frame);
 423                 auto frames = filter_.poll_all();
 424
 425                 if (frames.empty())
 426                         return;
 427
 428                 if (frames.size() == 1)
 429                 {
 430                         render(frames[0]);
 431                         graph_->set_value("frame-time", perf_timer_.elapsed() * format_desc_.fps * 0.5);
 432
 433                         wait_for_vblank_and_display(); // progressive frame
 434                 }
 435                 else if (frames.size() == 2)
 436                 {
 437                         render(frames[0]);
 438                         double perf_elapsed = perf_timer_.elapsed();
 439
 440                         wait_for_vblank_and_display(); // field1
 441
 442                         perf_timer_.restart();
 443                         render(frames[1]);
 444                         perf_elapsed += perf_timer_.elapsed();
 445                         graph_->set_value("frame-time", perf_elapsed * format_desc_.fps * 0.5);
 446
 447                         wait_for_vblank_and_display(); // field2
 448                 }
 449         }
 450
 451         void render(spl::shared_ptr<AVFrame> av_frame)
 452         {
 453                 GL(glBindTexture(GL_TEXTURE_2D, texture_));
 454
 455                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]));
 456                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0));
 457
 458                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]));
 459                 GL(glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW));
 460
 461                 auto ptr = reinterpret_cast<char*>(GL2(glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY)));
 462                 if(ptr)
 463                 {
 464                         if(config_.key_only)
 465                         {
 466                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)
 467                                 {
 468                                         for(int n = r.begin(); n != r.end(); ++n)
 469                                                 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);
 470                                 });
 471                         }
 472                         else
 473                         {
 474                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)
 475                                 {
 476                                         for(int n = r.begin(); n != r.end(); ++n)
 477                                                 A_memcpy(ptr+n*format_desc_.width*4, av_frame->data[0]+n*av_frame->linesize[0], format_desc_.width*4);
 478                                 });
 479                         }
 480
 481                         GL(glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER)); // release the mapped buffer
 482                 }
 483
 484                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0));
 485
 486                 GL(glClear(GL_COLOR_BUFFER_BIT));
 487                 glBegin(GL_QUADS);
 488                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);
 489                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);
 490                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);
 491                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);
 492                 glEnd();
 493
 494                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 495
 496                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());
 497         }
 498
 499
 500         std::future<bool> send(core::const_frame frame)
 501         {
 502                 if(!frame_buffer_.try_push(frame))
 503                         graph_->set_tag("dropped-frame");
 504
 505                 return make_ready_future(is_running_.load());
 506         }
 507
 508         std::wstring channel_and_format() const
 509         {
 510                 return L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";
 511         }
 512
 513         std::wstring print() const
 514         {
 515                 return config_.name + channel_and_format();
 516         }
 517
 518         void calculate_aspect()
 519         {
 520                 if(config_.windowed)
 521                 {
 522                         screen_height_ = window_.getSize().y;
 523                         screen_width_ = window_.getSize().x;
 524                 }
 525
 526                 GL(glViewport(0, 0, screen_width_, screen_height_));
 527
 528                 std::pair<float, float> target_ratio = None();
 529                 if(config_.stretch == fill)
 530                         target_ratio = Fill();
 531                 else if(config_.stretch == uniform)
 532                         target_ratio = Uniform();
 533                 else if(config_.stretch == uniform_to_fill)
 534                         target_ratio = UniformToFill();
 535
 536                 width_ = target_ratio.first;
 537                 height_ = target_ratio.second;
 538         }
 539
 540         std::pair<float, float> None()
 541         {
 542                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
 543                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
 544
 545                 return std::make_pair(width, height);
 546         }
 547
 548         std::pair<float, float> Uniform()
 549         {
 550                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);
 551                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));
 552                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);
 553
 554                 return std::make_pair(width, height);
 555         }
 556
 557         std::pair<float, float> Fill()
 558         {
 559                 return std::make_pair(1.0f, 1.0f);
 560         }
 561
 562         std::pair<float, float> UniformToFill()
 563         {
 564                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
 565                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
 566                 float r_inv = 1.0f/std::min(wr, hr);
 567
 568                 float width = wr*r_inv;
 569                 float height = hr*r_inv;
 570
 571                 return std::make_pair(width, height);
 572         }
 573 };
 574
 575
 576 struct screen_consumer_proxy : public core::frame_consumer
 577 {
 578         core::monitor::subject                          monitor_subject_;
 579         const configuration                                     config_;
 580         std::unique_ptr<screen_consumer>        consumer_;
 581         core::interaction_sink*                         sink_;
 582
 583 public:
 584
 585         screen_consumer_proxy(const configuration& config, core::interaction_sink* sink)
 586                 : config_(config)
 587                 , sink_(sink)
 588         {
 589         }
 590
 591         // frame_consumer
 592
 593         void initialize(const core::video_format_desc& format_desc, int channel_index) override
 594         {
 595                 consumer_.reset();
 596                 consumer_.reset(new screen_consumer(config_, format_desc, channel_index, sink_));
 597         }
 598
 599         std::future<bool> send(core::const_frame frame) override
 600         {
 601                 return consumer_->send(frame);
 602         }
 603
 604         std::wstring print() const override
 605         {
 606                 return consumer_ ? consumer_->print() : L"[screen_consumer]";
 607         }
 608
 609         std::wstring name() const override
 610         {
 611                 return L"screen";
 612         }
 613
 614         boost::property_tree::wptree info() const override
 615         {
 616                 boost::property_tree::wptree info;
 617                 info.add(L"type", L"screen");
 618                 info.add(L"key-only", config_.key_only);
 619                 info.add(L"windowed", config_.windowed);
 620                 info.add(L"auto-deinterlace", config_.auto_deinterlace);
 621                 return info;
 622         }
 623
 624         bool has_synchronization_clock() const override
 625         {
 626                 return false;
 627         }
 628
 629         int buffer_depth() const override
 630         {
 631                 return 1;
 632         }
 633
 634         int index() const override
 635         {
 636                 return 600 + (config_.key_only ? 10 : 0) + config_.screen_index;
 637         }
 638
 639         core::monitor::subject& monitor_output()
 640         {
 641                 return monitor_subject_;
 642         }
 643 };
 644
 645 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)
 646 {
 647         if(params.size() < 1 || params[0] != L"SCREEN")
 648                 return core::frame_consumer::empty();
 649
 650         configuration config;
 651
 652         if(params.size() > 1)
 653                 config.screen_index = boost::lexical_cast<int>(params[1]);
 654
 655         config.key_only = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();
 656         config.key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();
 657
 658         auto name_it    = std::find(params.begin(), params.end(), L"NAME");
 659         if(name_it != params.end() && ++name_it != params.end())
 660                 config.name = *name_it;
 661
 662         return spl::make_shared<screen_consumer_proxy>(config, nullptr);
 663 }
 664
 665 spl::shared_ptr<core::frame_consumer> create_consumer(const boost::property_tree::wptree& ptree, core::interaction_sink* sink)
 666 {
 667         configuration config;
 668         config.name                             = ptree.get(L"name",     config.name);
 669         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;
 670         config.windowed                 = ptree.get(L"windowed", config.windowed);
 671         config.key_only                 = ptree.get(L"key-only", config.key_only);
 672         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);
 673         config.vsync                    = ptree.get(L"vsync", config.vsync);
 674
 675         auto stretch_str = ptree.get(L"stretch", L"default");
 676         if(stretch_str == L"uniform")
 677                 config.stretch = stretch::uniform;
 678         else if(stretch_str == L"uniform_to_fill")
 679                 config.stretch = stretch::uniform_to_fill;
 680
 681         auto aspect_str = ptree.get(L"aspect-ratio", L"default");
 682         if(aspect_str == L"16:9")
 683                 config.aspect = configuration::aspect_16_9;
 684         else if(aspect_str == L"4:3")
 685                 config.aspect = configuration::aspect_4_3;
 686
 687         return spl::make_shared<screen_consumer_proxy>(config, sink);
 688 }
 689
 690 }}