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