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/foreach.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 stretch
  79 {
  80         none,
  81         uniform,
  82         fill,
  83         uniform_to_fill
  84 };
  85
  86 struct configuration
  87 {
  88         enum aspect_ratio
  89         {
  90                 aspect_4_3 = 0,
  91                 aspect_16_9,
  92                 aspect_invalid,
  93         };
  94
  95         std::wstring    name;
  96         int                             screen_index;
  97         stretch                 stretch;
  98         bool                    windowed;
  99         bool                    auto_deinterlace;
 100         bool                    key_only;
 101         aspect_ratio    aspect;
 102         bool                    vsync;
 103         bool                    interactive;
 104
 105         configuration()
 106                 : name(L"ogl")
 107                 , screen_index(0)
 108                 , stretch(fill)
 109                 , windowed(true)
 110                 , auto_deinterlace(true)
 111                 , key_only(false)
 112                 , aspect(aspect_invalid)
 113                 , vsync(true)
 114                 , interactive(true)
 115         {
 116         }
 117 };
 118
 119 struct screen_consumer : boost::noncopyable
 120 {
 121         const configuration                                                                     config_;
 122         core::video_format_desc                                                         format_desc_;
 123         int                                                                                                     channel_index_;
 124
 125         GLuint                                                                                          texture_;
 126         std::vector<GLuint>                                                                     pbos_;
 127
 128         float                                                                                           width_;
 129         float                                                                                           height_;
 130         int                                                                                                     screen_x_;
 131         int                                                                                                     screen_y_;
 132         int                                                                                                     screen_width_;
 133         int                                                                                                     screen_height_;
 134         int                                                                                                     square_width_;
 135         int                                                                                                     square_height_;
 136
 137         sf::Window                                                                                      window_;
 138
 139         spl::shared_ptr<diagnostics::graph>                                     graph_;
 140         boost::timer                                                                            perf_timer_;
 141         boost::timer                                                                            tick_timer_;
 142
 143         caspar::prec_timer                                                                      wait_timer_;
 144
 145         tbb::concurrent_bounded_queue<core::const_frame>        frame_buffer_;
 146         core::interaction_sink*                                                         sink_;
 147
 148         boost::thread                                                                           thread_;
 149         tbb::atomic<bool>                                                                       is_running_;
 150
 151         ffmpeg::filter                                                                          filter_;
 152 public:
 153         screen_consumer(
 154                         const configuration& config,
 155                         const core::video_format_desc& format_desc,
 156                         int channel_index,
 157                         core::interaction_sink* sink)
 158                 : config_(config)
 159                 , format_desc_(format_desc)
 160                 , channel_index_(channel_index)
 161                 , texture_(0)
 162                 , pbos_(2, 0)
 163                 , screen_width_(format_desc.width)
 164                 , screen_height_(format_desc.height)
 165                 , square_width_(format_desc.square_width)
 166                 , square_height_(format_desc.square_height)
 167                 , sink_(sink)
 168                 , filter_([&]() -> ffmpeg::filter
 169                 {
 170                         const auto sample_aspect_ratio =
 171                                 boost::rational<int>(
 172                                         format_desc.square_width,
 173                                         format_desc.square_height) /
 174                                 boost::rational<int>(
 175                                         format_desc.width,
 176                                         format_desc.height);
 177
 178                         return ffmpeg::filter(
 179                                 format_desc.width,
 180                                 format_desc.height,
 181                                 boost::rational<int>(format_desc.duration, format_desc.time_scale),
 182                                 boost::rational<int>(format_desc.time_scale, format_desc.duration),
 183                                 sample_aspect_ratio,
 184                                 AV_PIX_FMT_BGRA,
 185                                 { AV_PIX_FMT_BGRA },
 186                                 format_desc.field_mode == core::field_mode::progressive || !config.auto_deinterlace ? "" : "YADIF=1:-1");
 187                 }())
 188         {
 189                 if(format_desc_.format == core::video_format::ntsc && config_.aspect == configuration::aspect_4_3)
 190                 {
 191                         // Use default values which are 4:3.
 192                 }
 193                 else
 194                 {
 195                         if(config_.aspect == configuration::aspect_16_9)
 196                                 square_width_ = (format_desc.height*16)/9;
 197                         else if(config_.aspect == configuration::aspect_4_3)
 198                                 square_width_ = (format_desc.height*4)/3;
 199                 }
 200
 201                 frame_buffer_.set_capacity(1);
 202
 203                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));
 204                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));
 205                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));
 206                 graph_->set_text(print());
 207                 diagnostics::register_graph(graph_);
 208
 209                 DISPLAY_DEVICE d_device = {sizeof(d_device), 0};
 210                 std::vector<DISPLAY_DEVICE> displayDevices;
 211                 for(int n = 0; EnumDisplayDevices(NULL, n, &d_device, NULL); ++n)
 212                         displayDevices.push_back(d_device);
 213
 214                 if(config_.screen_index >= displayDevices.size())
 215                         CASPAR_LOG(warning) << print() << L" Invalid screen-index: " << config_.screen_index;
 216
 217                 DEVMODE devmode = {};
 218                 if(!EnumDisplaySettings(displayDevices[config_.screen_index].DeviceName, ENUM_CURRENT_SETTINGS, &devmode))
 219                         CASPAR_LOG(warning) << print() << L" Could not find display settings for screen-index: " << config_.screen_index;
 220
 221                 screen_x_               = devmode.dmPosition.x;
 222                 screen_y_               = devmode.dmPosition.y;
 223                 screen_width_   = config_.windowed ? square_width_ : devmode.dmPelsWidth;
 224                 screen_height_  = config_.windowed ? square_height_ : devmode.dmPelsHeight;
 225
 226                 is_running_ = true;
 227                 thread_ = boost::thread([this]{run();});
 228         }
 229
 230         ~screen_consumer()
 231         {
 232                 is_running_ = false;
 233                 frame_buffer_.try_push(core::const_frame::empty());
 234                 thread_.join();
 235         }
 236
 237         void init()
 238         {
 239                 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);
 240                 window_.setMouseCursorVisible(config_.interactive);
 241                 window_.setPosition(sf::Vector2i(screen_x_, screen_y_));
 242                 window_.setSize(sf::Vector2u(screen_width_, screen_height_));
 243                 window_.setActive();
 244
 245                 if(!GLEW_VERSION_2_1 && glewInit() != GLEW_OK)
 246                         CASPAR_THROW_EXCEPTION(gl::ogl_exception() << msg_info("Failed to initialize GLEW."));
 247
 248                 if(!GLEW_VERSION_2_1)
 249                         CASPAR_THROW_EXCEPTION(not_supported() << msg_info("Missing OpenGL 2.1 support."));
 250
 251                 GL(glEnable(GL_TEXTURE_2D));
 252                 GL(glDisable(GL_DEPTH_TEST));
 253                 GL(glClearColor(0.0, 0.0, 0.0, 0.0));
 254                 GL(glViewport(0, 0, format_desc_.width, format_desc_.height));
 255                 GL(glLoadIdentity());
 256
 257                 calculate_aspect();
 258
 259                 GL(glGenTextures(1, &texture_));
 260                 GL(glBindTexture(GL_TEXTURE_2D, texture_));
 261                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR));
 262                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
 263                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP));
 264                 GL(glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP));
 265                 GL(glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, format_desc_.width, format_desc_.height, 0, GL_BGRA, GL_UNSIGNED_BYTE, 0));
 266                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 267
 268                 GL(glGenBuffers(2, pbos_.data()));
 269
 270                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[0]);
 271                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
 272                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, pbos_[1]);
 273                 glBufferDataARB(GL_PIXEL_UNPACK_BUFFER_ARB, format_desc_.size, 0, GL_STREAM_DRAW_ARB);
 274                 glBindBufferARB(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
 275
 276                 auto wglSwapIntervalEXT = reinterpret_cast<void(APIENTRY*)(int)>(wglGetProcAddress("wglSwapIntervalEXT"));
 277                 if(wglSwapIntervalEXT)
 278                 {
 279                         if(config_.vsync)
 280                         {
 281                                 wglSwapIntervalEXT(1);
 282                                 CASPAR_LOG(info) << print() << " Enabled vsync.";
 283                         }
 284                         else
 285                                 wglSwapIntervalEXT(0);
 286                 }
 287
 288                 CASPAR_LOG(info) << print() << " Successfully Initialized.";
 289         }
 290
 291         void uninit()
 292         {
 293                 if(texture_)
 294                         glDeleteTextures(1, &texture_);
 295
 296                 BOOST_FOREACH(auto& pbo, pbos_)
 297                 {
 298                         if(pbo)
 299                                 glDeleteBuffers(1, &pbo);
 300                 }
 301         }
 302
 303         void run()
 304         {
 305                 try
 306                 {
 307                         init();
 308
 309                         while(is_running_)
 310                         {
 311                                 try
 312                                 {
 313                                         sf::Event e;
 314                                         while(window_.pollEvent(e))
 315                                         {
 316                                                 if (e.type == sf::Event::Resized)
 317                                                         calculate_aspect();
 318                                                 else if (e.type == sf::Event::Closed)
 319                                                         is_running_ = false;
 320                                                 else if (config_.interactive && sink_)
 321                                                 {
 322                                                         switch (e.type)
 323                                                         {
 324                                                         case sf::Event::MouseMoved:
 325                                                                 {
 326                                                                         auto& mouse_move = e.mouseMove;
 327                                                                         sink_->on_interaction(spl::make_shared<core::mouse_move_event>(
 328                                                                                         1,
 329                                                                                         static_cast<double>(mouse_move.x) / screen_width_,
 330                                                                                         static_cast<double>(mouse_move.y) / screen_height_));
 331                                                                 }
 332                                                                 break;
 333                                                         case sf::Event::MouseButtonPressed:
 334                                                         case sf::Event::MouseButtonReleased:
 335                                                                 {
 336                                                                         auto& mouse_button = e.mouseButton;
 337                                                                         sink_->on_interaction(spl::make_shared<core::mouse_button_event>(
 338                                                                                         1,
 339                                                                                         static_cast<double>(mouse_button.x) / screen_width_,
 340                                                                                         static_cast<double>(mouse_button.y) / screen_height_,
 341                                                                                         static_cast<int>(mouse_button.button),
 342                                                                                         e.type == sf::Event::MouseButtonPressed));
 343                                                                 }
 344                                                                 break;
 345                                                         }
 346                                                 }
 347                                         }
 348
 349                                         auto frame = core::const_frame::empty();
 350                                         frame_buffer_.pop(frame);
 351
 352                                         render_and_draw_frame(frame);
 353
 354                                         /*perf_timer_.restart();
 355                                         render(frame);
 356                                         graph_->set_value("frame-time", perf_timer_.elapsed()*format_desc_.fps*0.5);
 357
 358                                         window_.Display();*/
 359
 360                                         graph_->set_value("tick-time", tick_timer_.elapsed()*format_desc_.fps*0.5);
 361                                         tick_timer_.restart();
 362                                 }
 363                                 catch(...)
 364                                 {
 365                                         CASPAR_LOG_CURRENT_EXCEPTION();
 366                                         is_running_ = false;
 367                                 }
 368                         }
 369
 370                         uninit();
 371                 }
 372                 catch(...)
 373                 {
 374                         CASPAR_LOG_CURRENT_EXCEPTION();
 375                 }
 376         }
 377
 378         void try_sleep_almost_until_vblank()
 379         {
 380                 static const double THRESHOLD = 0.003;
 381                 double threshold = config_.vsync ? THRESHOLD : 0.0;
 382
 383                 auto frame_time = 1.0 / (format_desc_.fps * format_desc_.field_count);
 384
 385                 wait_timer_.tick(frame_time - threshold);
 386         }
 387
 388         void wait_for_vblank_and_display()
 389         {
 390                 try_sleep_almost_until_vblank();
 391                 window_.display();
 392                 // Make sure that the next tick measures the duration from this point in time.
 393                 wait_timer_.tick(0.0);
 394         }
 395
 396         spl::shared_ptr<AVFrame> get_av_frame()
 397         {
 398                 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);
 399                 avcodec_get_frame_defaults(av_frame.get());
 400
 401                 av_frame->linesize[0]           = format_desc_.width*4;
 402                 av_frame->format                        = PIX_FMT_BGRA;
 403                 av_frame->width                         = format_desc_.width;
 404                 av_frame->height                        = format_desc_.height;
 405                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;
 406                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper ? 1 : 0;
 407
 408                 return av_frame;
 409         }
 410
 411         void render_and_draw_frame(core::const_frame frame)
 412         {
 413                 if(static_cast<size_t>(frame.image_data().size()) != format_desc_.size)
 414                         return;
 415
 416                 if(screen_width_ == 0 && screen_height_ == 0)
 417                         return;
 418
 419                 perf_timer_.restart();
 420                 auto av_frame = get_av_frame();
 421                 av_frame->data[0] = const_cast<uint8_t*>(frame.image_data().begin());
 422
 423                 filter_.push(av_frame);
 424                 auto frames = filter_.poll_all();
 425
 426                 if (frames.empty())
 427                         return;
 428
 429                 if (frames.size() == 1)
 430                 {
 431                         render(frames[0]);
 432                         graph_->set_value("frame-time", perf_timer_.elapsed() * format_desc_.fps * 0.5);
 433
 434                         wait_for_vblank_and_display(); // progressive frame
 435                 }
 436                 else if (frames.size() == 2)
 437                 {
 438                         render(frames[0]);
 439                         double perf_elapsed = perf_timer_.elapsed();
 440
 441                         wait_for_vblank_and_display(); // field1
 442
 443                         perf_timer_.restart();
 444                         render(frames[1]);
 445                         perf_elapsed += perf_timer_.elapsed();
 446                         graph_->set_value("frame-time", perf_elapsed * format_desc_.fps * 0.5);
 447
 448                         wait_for_vblank_and_display(); // field2
 449                 }
 450         }
 451
 452         void render(spl::shared_ptr<AVFrame> av_frame)
 453         {
 454                 GL(glBindTexture(GL_TEXTURE_2D, texture_));
 455
 456                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[0]));
 457                 GL(glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, format_desc_.width, format_desc_.height, GL_BGRA, GL_UNSIGNED_BYTE, 0));
 458
 459                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbos_[1]));
 460                 GL(glBufferData(GL_PIXEL_UNPACK_BUFFER, format_desc_.size, 0, GL_STREAM_DRAW));
 461
 462                 auto ptr = reinterpret_cast<char*>(GL2(glMapBuffer(GL_PIXEL_UNPACK_BUFFER, GL_WRITE_ONLY)));
 463                 if(ptr)
 464                 {
 465                         if(config_.key_only)
 466                         {
 467                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)
 468                                 {
 469                                         for(int n = r.begin(); n != r.end(); ++n)
 470                                                 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);
 471                                 });
 472                         }
 473                         else
 474                         {
 475                                 tbb::parallel_for(tbb::blocked_range<int>(0, format_desc_.height), [&](const tbb::blocked_range<int>& r)
 476                                 {
 477                                         for(int n = r.begin(); n != r.end(); ++n)
 478                                                 A_memcpy(ptr+n*format_desc_.width*4, av_frame->data[0]+n*av_frame->linesize[0], format_desc_.width*4);
 479                                 });
 480                         }
 481
 482                         GL(glUnmapBuffer(GL_PIXEL_UNPACK_BUFFER)); // release the mapped buffer
 483                 }
 484
 485                 GL(glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0));
 486
 487                 GL(glClear(GL_COLOR_BUFFER_BIT));
 488                 glBegin(GL_QUADS);
 489                                 glTexCoord2f(0.0f,        1.0f);        glVertex2f(-width_, -height_);
 490                                 glTexCoord2f(1.0f,        1.0f);        glVertex2f( width_, -height_);
 491                                 glTexCoord2f(1.0f,        0.0f);        glVertex2f( width_,  height_);
 492                                 glTexCoord2f(0.0f,        0.0f);        glVertex2f(-width_,  height_);
 493                 glEnd();
 494
 495                 GL(glBindTexture(GL_TEXTURE_2D, 0));
 496
 497                 std::rotate(pbos_.begin(), pbos_.begin() + 1, pbos_.end());
 498         }
 499
 500
 501         std::future<bool> send(core::const_frame frame)
 502         {
 503                 if(!frame_buffer_.try_push(frame))
 504                         graph_->set_tag("dropped-frame");
 505
 506                 return make_ready_future(is_running_.load());
 507         }
 508
 509         std::wstring channel_and_format() const
 510         {
 511                 return L"[" + boost::lexical_cast<std::wstring>(channel_index_) + L"|" + format_desc_.name + L"]";
 512         }
 513
 514         std::wstring print() const
 515         {
 516                 return config_.name + channel_and_format();
 517         }
 518
 519         void calculate_aspect()
 520         {
 521                 if(config_.windowed)
 522                 {
 523                         screen_height_ = window_.getSize().y;
 524                         screen_width_ = window_.getSize().x;
 525                 }
 526
 527                 GL(glViewport(0, 0, screen_width_, screen_height_));
 528
 529                 std::pair<float, float> target_ratio = None();
 530                 if(config_.stretch == fill)
 531                         target_ratio = Fill();
 532                 else if(config_.stretch == uniform)
 533                         target_ratio = Uniform();
 534                 else if(config_.stretch == uniform_to_fill)
 535                         target_ratio = UniformToFill();
 536
 537                 width_ = target_ratio.first;
 538                 height_ = target_ratio.second;
 539         }
 540
 541         std::pair<float, float> None()
 542         {
 543                 float width = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
 544                 float height = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
 545
 546                 return std::make_pair(width, height);
 547         }
 548
 549         std::pair<float, float> Uniform()
 550         {
 551                 float aspect = static_cast<float>(square_width_)/static_cast<float>(square_height_);
 552                 float width = std::min(1.0f, static_cast<float>(screen_height_)*aspect/static_cast<float>(screen_width_));
 553                 float height = static_cast<float>(screen_width_*width)/static_cast<float>(screen_height_*aspect);
 554
 555                 return std::make_pair(width, height);
 556         }
 557
 558         std::pair<float, float> Fill()
 559         {
 560                 return std::make_pair(1.0f, 1.0f);
 561         }
 562
 563         std::pair<float, float> UniformToFill()
 564         {
 565                 float wr = static_cast<float>(square_width_)/static_cast<float>(screen_width_);
 566                 float hr = static_cast<float>(square_height_)/static_cast<float>(screen_height_);
 567                 float r_inv = 1.0f/std::min(wr, hr);
 568
 569                 float width = wr*r_inv;
 570                 float height = hr*r_inv;
 571
 572                 return std::make_pair(width, height);
 573         }
 574 };
 575
 576
 577 struct screen_consumer_proxy : public core::frame_consumer
 578 {
 579         core::monitor::subject                          monitor_subject_;
 580         const configuration                                     config_;
 581         std::unique_ptr<screen_consumer>        consumer_;
 582         core::interaction_sink*                         sink_;
 583
 584 public:
 585
 586         screen_consumer_proxy(const configuration& config, core::interaction_sink* sink)
 587                 : config_(config)
 588                 , sink_(sink)
 589         {
 590         }
 591
 592         // frame_consumer
 593
 594         void initialize(const core::video_format_desc& format_desc, int channel_index) override
 595         {
 596                 consumer_.reset();
 597                 consumer_.reset(new screen_consumer(config_, format_desc, channel_index, sink_));
 598         }
 599
 600         std::future<bool> send(core::const_frame frame) override
 601         {
 602                 return consumer_->send(frame);
 603         }
 604
 605         std::wstring print() const override
 606         {
 607                 return consumer_ ? consumer_->print() : L"[screen_consumer]";
 608         }
 609
 610         std::wstring name() const override
 611         {
 612                 return L"screen";
 613         }
 614
 615         boost::property_tree::wptree info() const override
 616         {
 617                 boost::property_tree::wptree info;
 618                 info.add(L"type", L"screen");
 619                 info.add(L"key-only", config_.key_only);
 620                 info.add(L"windowed", config_.windowed);
 621                 info.add(L"auto-deinterlace", config_.auto_deinterlace);
 622                 return info;
 623         }
 624
 625         bool has_synchronization_clock() const override
 626         {
 627                 return false;
 628         }
 629
 630         int buffer_depth() const override
 631         {
 632                 return 1;
 633         }
 634
 635         int index() const override
 636         {
 637                 return 600 + (config_.key_only ? 10 : 0) + config_.screen_index;
 638         }
 639
 640         core::monitor::subject& monitor_output()
 641         {
 642                 return monitor_subject_;
 643         }
 644 };
 645
 646 spl::shared_ptr<core::frame_consumer> create_consumer(const std::vector<std::wstring>& params)
 647 {
 648         if(params.size() < 1 || params[0] != L"SCREEN")
 649                 return core::frame_consumer::empty();
 650
 651         configuration config;
 652
 653         if(params.size() > 1)
 654                 config.screen_index = boost::lexical_cast<int>(params[1]);
 655
 656         config.key_only = std::find(params.begin(), params.end(), L"WINDOWED") != params.end();
 657         config.key_only = std::find(params.begin(), params.end(), L"KEY_ONLY") != params.end();
 658
 659         auto name_it    = std::find(params.begin(), params.end(), L"NAME");
 660         if(name_it != params.end() && ++name_it != params.end())
 661                 config.name = *name_it;
 662
 663         return spl::make_shared<screen_consumer_proxy>(config, nullptr);
 664 }
 665
 666 spl::shared_ptr<core::frame_consumer> create_consumer(const boost::property_tree::wptree& ptree, core::interaction_sink* sink)
 667 {
 668         configuration config;
 669         config.name                             = ptree.get(L"name",     config.name);
 670         config.screen_index             = ptree.get(L"device",   config.screen_index+1)-1;
 671         config.windowed                 = ptree.get(L"windowed", config.windowed);
 672         config.key_only                 = ptree.get(L"key-only", config.key_only);
 673         config.auto_deinterlace = ptree.get(L"auto-deinterlace", config.auto_deinterlace);
 674         config.vsync                    = ptree.get(L"vsync", config.vsync);
 675
 676         auto stretch_str = ptree.get(L"stretch", L"default");
 677         if(stretch_str == L"uniform")
 678                 config.stretch = stretch::uniform;
 679         else if(stretch_str == L"uniform_to_fill")
 680                 config.stretch = stretch::uniform_to_fill;
 681
 682         auto aspect_str = ptree.get(L"aspect-ratio", L"default");
 683         if(aspect_str == L"16:9")
 684                 config.aspect = configuration::aspect_16_9;
 685         else if(aspect_str == L"4:3")
 686                 config.aspect = configuration::aspect_4_3;
 687
 688         return spl::make_shared<screen_consumer_proxy>(config, sink);
 689 }
 690
 691 }}