git.sesse.net Git - casparcg/blob - modules/flash/producer/flash_producer.cpp

   1 /*\r
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>\r
   3 *\r
   4 * This file is part of CasparCG (www.casparcg.com).\r
   5 *\r
   6 * CasparCG is free software: you can redistribute it and/or modify\r
   7 * it under the terms of the GNU General Public License as published by\r
   8 * the Free Software Foundation, either version 3 of the License, or\r
   9 * (at your option) any later version.\r
  10 *\r
  11 * CasparCG is distributed in the hope that it will be useful,\r
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of\r
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\r
  14 * GNU General Public License for more details.\r
  15 *\r
  16 * You should have received a copy of the GNU General Public License\r
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.\r
  18 *\r
  19 * Author: Robert Nagy, ronag89@gmail.com\r
  20 */\r
  21 \r
  22 #include "../stdafx.h"\r
  23 \r
  24 #if defined(_MSC_VER)\r
  25 #pragma warning (disable : 4146)\r
  26 #pragma warning (disable : 4244)\r
  27 #endif\r
  28 \r
  29 #include "flash_producer.h"\r
  30 #include "FlashAxContainer.h"\r
  31 \r
  32 #include "../util/swf.h"\r
  33 \r
  34 #include <core/video_format.h>\r
  35 \r
  36 #include <core/monitor/monitor.h>\r
  37 #include <core/producer/frame/basic_frame.h>\r
  38 #include <core/producer/frame/frame_factory.h>\r
  39 #include <core/mixer/write_frame.h>\r
  40 \r
  41 #include <common/env.h>\r
  42 #include <common/concurrency/executor.h>\r
  43 #include <common/concurrency/lock.h>\r
  44 #include <common/diagnostics/graph.h>\r
  45 #include <common/memory/memcpy.h>\r
  46 #include <common/memory/memclr.h>\r
  47 #include <common/utility/timer.h>\r
  48 \r
  49 #include <boost/filesystem.hpp>\r
  50 #include <boost/property_tree/ptree.hpp>\r
  51 #include <boost/thread.hpp>\r
  52 #include <boost/timer.hpp>\r
  53 #include <boost/algorithm/string.hpp>\r
  54 \r
  55 #include <functional>\r
  56 \r
  57 #include <tbb/spin_mutex.h>\r
  58 \r
  59 namespace caspar { namespace flash {\r
  60                 \r
  61 class bitmap\r
  62 {\r
  63 public:\r
  64         bitmap(size_t width, size_t height)\r
  65                 : bmp_data_(nullptr)\r
  66                 , hdc_(CreateCompatibleDC(0), DeleteDC)\r
  67         {       \r
  68                 BITMAPINFO info;\r
  69                 memset(&info, 0, sizeof(BITMAPINFO));\r
  70                 info.bmiHeader.biBitCount = 32;\r
  71                 info.bmiHeader.biCompression = BI_RGB;\r
  72                 info.bmiHeader.biHeight = -height;\r
  73                 info.bmiHeader.biPlanes = 1;\r
  74                 info.bmiHeader.biSize = sizeof(BITMAPINFO);\r
  75                 info.bmiHeader.biWidth = width;\r
  76 \r
  77                 bmp_.reset(CreateDIBSection(static_cast<HDC>(hdc_.get()), &info, DIB_RGB_COLORS, reinterpret_cast<void**>(&bmp_data_), 0, 0), DeleteObject);\r
  78                 SelectObject(static_cast<HDC>(hdc_.get()), bmp_.get()); \r
  79 \r
  80                 if(!bmp_data_)\r
  81                         BOOST_THROW_EXCEPTION(std::bad_alloc());\r
  82         }\r
  83 \r
  84         operator HDC() {return static_cast<HDC>(hdc_.get());}\r
  85 \r
  86         BYTE* data() { return bmp_data_;}\r
  87         const BYTE* data() const { return bmp_data_;}\r
  88 \r
  89 private:\r
  90         BYTE* bmp_data_;        \r
  91         std::shared_ptr<void> hdc_;\r
  92         std::shared_ptr<void> bmp_;\r
  93 };\r
  94 \r
  95 struct template_host\r
  96 {\r
  97         std::wstring  video_mode;\r
  98         std::wstring  filename;\r
  99         size_t            width;\r
 100         size_t            height;\r
 101 };\r
 102 \r
 103 template_host get_template_host(const core::video_format_desc& desc)\r
 104 {\r
 105         try\r
 106         {\r
 107                 std::vector<template_host> template_hosts;\r
 108                 BOOST_FOREACH(auto& xml_mapping, env::properties().get_child(L"configuration.template-hosts"))\r
 109                 {\r
 110                         try\r
 111                         {\r
 112                                 template_host template_host;\r
 113                                 template_host.video_mode                = xml_mapping.second.get(L"video-mode", L"");\r
 114                                 template_host.filename                  = xml_mapping.second.get(L"filename",   L"cg.fth");\r
 115                                 template_host.width                             = xml_mapping.second.get(L"width",              desc.width);\r
 116                                 template_host.height                    = xml_mapping.second.get(L"height",             desc.height);\r
 117                                 template_hosts.push_back(template_host);\r
 118                         }\r
 119                         catch(...){}\r
 120                 }\r
 121 \r
 122                 auto template_host_it = boost::find_if(template_hosts, [&](template_host template_host){return template_host.video_mode == desc.name;});\r
 123                 if(template_host_it == template_hosts.end())\r
 124                         template_host_it = boost::find_if(template_hosts, [&](template_host template_host){return template_host.video_mode == L"";});\r
 125 \r
 126                 if(template_host_it != template_hosts.end())\r
 127                         return *template_host_it;\r
 128         }\r
 129         catch(...){}\r
 130                 \r
 131         template_host template_host;\r
 132         template_host.filename = L"cg.fth";\r
 133 \r
 134         for(auto it = boost::filesystem2::wdirectory_iterator(env::template_folder()); it != boost::filesystem2::wdirectory_iterator(); ++it)\r
 135         {\r
 136                 if(boost::iequals(it->path().extension(), L"." + desc.name))\r
 137                 {\r
 138                         template_host.filename = it->filename();\r
 139                         break;\r
 140                 }\r
 141         }\r
 142 \r
 143         template_host.width =  desc.square_width;\r
 144         template_host.height = desc.square_height;\r
 145         return template_host;\r
 146 }\r
 147 \r
 148 class flash_renderer\r
 149 {       \r
 150         struct com_init\r
 151         {\r
 152                 HRESULT result_;\r
 153 \r
 154                 com_init()\r
 155                         : result_(CoInitialize(nullptr))\r
 156                 {\r
 157                         if(FAILED(result_))\r
 158                                 BOOST_THROW_EXCEPTION(caspar_exception() << msg_info("Failed to initialize com-context for flash-player"));\r
 159                 }\r
 160 \r
 161                 ~com_init()\r
 162                 {\r
 163                         if(SUCCEEDED(result_))\r
 164                                 ::CoUninitialize();\r
 165                 }\r
 166         } com_init_;\r
 167         \r
 168         const safe_ptr<diagnostics::graph>                              graph_;\r
 169         const size_t                                                                    width_;\r
 170         const size_t                                                                    height_;\r
 171         const std::wstring                                                              filename_;\r
 172         const std::shared_ptr<core::frame_factory>              frame_factory_;\r
 173         \r
 174         CComObject<caspar::flash::FlashAxContainer>*    ax_;\r
 175         safe_ptr<core::basic_frame>                                             head_;\r
 176         bitmap                                                                                  bmp_;\r
 177         \r
 178         boost::timer                                                                    frame_timer_;\r
 179         boost::timer                                                                    tick_timer_;\r
 180 \r
 181         high_prec_timer                                                                 timer_;\r
 182         \r
 183 public:\r
 184         flash_renderer(const safe_ptr<diagnostics::graph>& graph, const std::shared_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, int width, int height) \r
 185                 : graph_(graph)\r
 186                 , width_(width)\r
 187                 , height_(height)\r
 188                 , filename_(filename)\r
 189                 , frame_factory_(frame_factory)\r
 190                 , ax_(nullptr)\r
 191                 , head_(core::basic_frame::empty())\r
 192                 , bmp_(width, height)\r
 193         {               \r
 194                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));\r
 195                 graph_->set_color("tick-time", diagnostics::color(0.0f, 0.6f, 0.9f));\r
 196                 graph_->set_color("param", diagnostics::color(1.0f, 0.5f, 0.0f));       \r
 197                 graph_->set_color("sync", diagnostics::color(0.8f, 0.3f, 0.2f));                        \r
 198                 \r
 199                 if(FAILED(CComObject<caspar::flash::FlashAxContainer>::CreateInstance(&ax_)))\r
 200                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(narrow(print()) + " Failed to create FlashAxContainer"));\r
 201                 \r
 202                 ax_->set_print([this]{return print();});\r
 203 \r
 204                 if(FAILED(ax_->CreateAxControl()))\r
 205                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(narrow(print()) + " Failed to Create FlashAxControl"));\r
 206                 \r
 207                 CComPtr<IShockwaveFlash> spFlash;\r
 208                 if(FAILED(ax_->QueryControl(&spFlash)))\r
 209                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(narrow(print()) + " Failed to Query FlashAxControl"));\r
 210                                                                                                 \r
 211                 if(FAILED(spFlash->put_Playing(true)) )\r
 212                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(narrow(print()) + " Failed to start playing Flash"));\r
 213 \r
 214                 if(FAILED(spFlash->put_Movie(CComBSTR(filename.c_str()))))\r
 215                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(narrow(print()) + " Failed to Load Template Host"));\r
 216                                                                                 \r
 217                 if(FAILED(spFlash->put_ScaleMode(2)))  //Exact fit. Scale without respect to the aspect ratio.\r
 218                         BOOST_THROW_EXCEPTION(caspar_exception() << msg_info(narrow(print()) + " Failed to Set Scale Mode"));\r
 219                                                 \r
 220                 ax_->SetSize(width_, height_);          \r
 221                 render_frame(false);\r
 222         \r
 223                 CASPAR_LOG(info) << print() << L" Initialized.";\r
 224         }\r
 225 \r
 226         ~flash_renderer()\r
 227         {               \r
 228                 if(ax_)\r
 229                 {\r
 230                         ax_->DestroyAxControl();\r
 231                         ax_->Release();\r
 232                 }\r
 233                 graph_->set_value("tick-time", 0.0f);\r
 234                 graph_->set_value("frame-time", 0.0f);\r
 235                 CASPAR_LOG(info) << print() << L" Uninitialized.";\r
 236         }\r
 237         \r
 238         std::wstring call(const std::wstring& param)\r
 239         {               \r
 240                 std::wstring result;\r
 241 \r
 242                 CASPAR_LOG(trace) << print() << " Call: " << param;\r
 243 \r
 244                 if(!ax_->FlashCall(param, result))\r
 245                         CASPAR_LOG(warning) << print() << L" Flash call failed:" << param;//BOOST_THROW_EXCEPTION(invalid_operation() << msg_info("Flash function call failed.") << arg_name_info("param") << arg_value_info(narrow(param)));\r
 246                 graph_->set_tag("param");\r
 247 \r
 248                 return result;\r
 249         }\r
 250         \r
 251         safe_ptr<core::basic_frame> render_frame(double sync)\r
 252         {\r
 253                 float frame_time = 1.0f/ax_->GetFPS();\r
 254 \r
 255                 graph_->set_value("tick-time", static_cast<float>(tick_timer_.elapsed()/frame_time)*0.5f);\r
 256                 tick_timer_.restart();\r
 257 \r
 258                 if(ax_->IsEmpty())\r
 259                         return core::basic_frame::empty();              \r
 260                 \r
 261                 if(sync > 0.00001)                      \r
 262                         timer_.tick(frame_time*sync); // This will block the thread.\r
 263                 else\r
 264                         graph_->set_tag("sync");\r
 265 \r
 266                 graph_->set_value("sync", sync);\r
 267                         \r
 268                 frame_timer_.restart();\r
 269 \r
 270                 ax_->Tick();\r
 271                 if(ax_->InvalidRect())\r
 272                 {\r
 273                         fast_memclr(bmp_.data(), width_*height_*4);\r
 274                         ax_->DrawControl(bmp_);\r
 275                 \r
 276                         core::pixel_format_desc desc;\r
 277                         desc.pix_fmt = core::pixel_format::bgra;\r
 278                         desc.planes.push_back(core::pixel_format_desc::plane(width_, height_, 4));\r
 279                         auto frame = frame_factory_->create_frame(this, desc);\r
 280 \r
 281                         if(frame->image_data().size() == static_cast<int>(width_*height_*4))\r
 282                         {\r
 283                                 fast_memcpy(frame->image_data().begin(), bmp_.data(), width_*height_*4);\r
 284                                 frame->commit();\r
 285                                 head_ = frame;\r
 286                         }\r
 287                 }               \r
 288                                         \r
 289                 MSG msg;\r
 290                 while(PeekMessage(&msg, NULL, NULL, NULL, PM_REMOVE)) // DO NOT REMOVE THE MESSAGE DISPATCH LOOP. Without this some stuff doesn't work!  \r
 291                 {\r
 292                         if(msg.message == WM_TIMER && msg.wParam == 3 && msg.lParam == 0) // We tick this inside FlashAxContainer\r
 293                                 continue;\r
 294                         \r
 295                         TranslateMessage(&msg);\r
 296                         DispatchMessage(&msg);                  \r
 297                 }\r
 298                                                                                 \r
 299                 graph_->set_value("frame-time", static_cast<float>(frame_timer_.elapsed()/frame_time)*0.5f);\r
 300                 return head_;\r
 301         }\r
 302 \r
 303         bool is_empty() const\r
 304         {\r
 305                 return ax_->IsEmpty();\r
 306         }\r
 307 \r
 308         double fps() const\r
 309         {\r
 310                 return ax_->GetFPS();   \r
 311         }\r
 312         \r
 313         std::wstring print()\r
 314         {\r
 315                 return L"flash-player[" + boost::filesystem::wpath(filename_).filename() \r
 316                                   + L"|" + boost::lexical_cast<std::wstring>(width_)\r
 317                                   + L"x" + boost::lexical_cast<std::wstring>(height_)\r
 318                                   + L"]";               \r
 319         }\r
 320 };\r
 321 \r
 322 struct flash_producer : public core::frame_producer\r
 323 {       \r
 324         core::monitor::subject                                                                          monitor_subject_;\r
 325         const std::wstring                                                                                      filename_;      \r
 326         const safe_ptr<core::frame_factory>                                                     frame_factory_;\r
 327         const int                                                                                                       width_;\r
 328         const int                                                                                                       height_;\r
 329         const int                                                                                                       buffer_size_;\r
 330 \r
 331         tbb::atomic<int>                                                                                        fps_;\r
 332 \r
 333         safe_ptr<diagnostics::graph>                                                            graph_;\r
 334 \r
 335         std::queue<safe_ptr<core::basic_frame>>                                         frame_buffer_;\r
 336         tbb::concurrent_bounded_queue<safe_ptr<core::basic_frame>>      output_buffer_;\r
 337         \r
 338         mutable tbb::spin_mutex                                                                         last_frame_mutex_;\r
 339         safe_ptr<core::basic_frame>                                                                     last_frame_;\r
 340                 \r
 341         std::unique_ptr<flash_renderer>                                                         renderer_;\r
 342 \r
 343         executor                                                                                                        executor_;      \r
 344 public:\r
 345         flash_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::wstring& filename, size_t width, size_t height) \r
 346                 : filename_(filename)           \r
 347                 , frame_factory_(frame_factory)\r
 348                 , last_frame_(core::basic_frame::empty())\r
 349                 , width_(width > 0 ? width : frame_factory->get_video_format_desc().width)\r
 350                 , height_(height > 0 ? height : frame_factory->get_video_format_desc().height)\r
 351                 , buffer_size_(env::properties().get(L"configuration.flash.buffer-depth", frame_factory_->get_video_format_desc().fps > 30.0 ? 4 : 2))\r
 352                 , executor_(L"flash_producer")\r
 353         {       \r
 354                 fps_ = 0;\r
 355          \r
 356                 graph_->set_color("late-frame", diagnostics::color(0.6f, 0.3f, 0.9f));\r
 357                 graph_->set_text(print());\r
 358                 diagnostics::register_graph(graph_);\r
 359                 \r
 360                 renderer_.reset(new flash_renderer(graph_, frame_factory_, filename_, width_, height_));\r
 361 \r
 362                 while(output_buffer_.size() < buffer_size_)\r
 363                         output_buffer_.push(core::basic_frame::empty());\r
 364         }\r
 365 \r
 366         ~flash_producer()\r
 367         {\r
 368                 executor_.invoke([this]\r
 369                 {\r
 370                         renderer_.reset();\r
 371                 }, high_priority);\r
 372         }\r
 373 \r
 374         // frame_producer\r
 375                 \r
 376         virtual safe_ptr<core::basic_frame> receive(int) override\r
 377         {                                       \r
 378                 auto frame = core::basic_frame::late();\r
 379                 \r
 380                 if(output_buffer_.try_pop(frame))       \r
 381                         next();\r
 382                 else\r
 383                         graph_->set_tag("late-frame");\r
 384                 \r
 385                 monitor_subject_ << core::monitor::message("/host/path")                % filename_\r
 386                                              << core::monitor::message("/host/width")   % width_\r
 387                                              << core::monitor::message("/host/height")  % height_\r
 388                                              << core::monitor::message("/host/fps")             % fps_\r
 389                                              << core::monitor::message("/buffer")               % output_buffer_.size() % buffer_size_;\r
 390 \r
 391                 return frame;\r
 392         }\r
 393 \r
 394         virtual safe_ptr<core::basic_frame> last_frame() const override\r
 395         {\r
 396                 return lock(last_frame_mutex_, [this]\r
 397                 {\r
 398                         return last_frame_;\r
 399                 });\r
 400         }               \r
 401         \r
 402         virtual boost::unique_future<std::wstring> call(const std::wstring& param) override\r
 403         {       \r
 404                 return executor_.begin_invoke([this, param]() -> std::wstring\r
 405                 {                       \r
 406                         try\r
 407                         {\r
 408                                 if(!renderer_)\r
 409                                 {\r
 410                                         renderer_.reset(new flash_renderer(graph_, frame_factory_, filename_, width_, height_));\r
 411 \r
 412                                         while(output_buffer_.size() < buffer_size_)\r
 413                                                 output_buffer_.push(core::basic_frame::empty());\r
 414                                 }\r
 415 \r
 416                                 return renderer_->call(param);  \r
 417 \r
 418                                 //const auto& format_desc = frame_factory_->get_video_format_desc();\r
 419                                 //if(abs(context_->fps() - format_desc.fps) > 0.01 && abs(context_->fps()/2.0 - format_desc.fps) > 0.01)\r
 420                                 //      CASPAR_LOG(warning) << print() << " Invalid frame-rate: " << context_->fps() << L". Should be either " << format_desc.fps << L" or " << format_desc.fps*2.0 << L".";\r
 421                         }\r
 422                         catch(...)\r
 423                         {\r
 424                                 CASPAR_LOG_CURRENT_EXCEPTION();\r
 425                                 renderer_.reset(nullptr);\r
 426                         }\r
 427 \r
 428                         return L"";\r
 429                 });\r
 430         }\r
 431                 \r
 432         virtual std::wstring print() const override\r
 433         { \r
 434                 return L"flash[" + boost::filesystem::wpath(filename_).filename() + L"|" + boost::lexical_cast<std::wstring>(fps_) + L"]";              \r
 435         }       \r
 436 \r
 437         virtual boost::property_tree::wptree info() const override\r
 438         {\r
 439                 boost::property_tree::wptree info;\r
 440                 info.add(L"type", L"flash-producer");\r
 441                 return info;\r
 442         }\r
 443 \r
 444         // flash_producer\r
 445         \r
 446         void next()\r
 447         {       \r
 448                 executor_.begin_invoke([this]\r
 449                 {\r
 450                         if(!renderer_)\r
 451                                 frame_buffer_.push(core::basic_frame::empty());\r
 452 \r
 453                         if(frame_buffer_.empty())\r
 454                         {\r
 455                                 auto format_desc = frame_factory_->get_video_format_desc();\r
 456                                         \r
 457                                 if(abs(renderer_->fps()/2.0 - format_desc.fps) < 2.0) // flash == 2 * format -> interlace\r
 458                                 {\r
 459                                         auto frame1 = render_frame();\r
 460                                         auto frame2 = render_frame();\r
 461                                         frame_buffer_.push(core::basic_frame::interlace(frame1, frame2, format_desc.field_mode));\r
 462                                 }\r
 463                                 else if(abs(renderer_->fps() - format_desc.fps/2.0) < 2.0) // format == 2 * flash -> duplicate\r
 464                                 {\r
 465                                         auto frame = render_frame();\r
 466                                         frame_buffer_.push(frame);\r
 467                                         frame_buffer_.push(frame);\r
 468                                 }\r
 469                                 else //if(abs(renderer_->fps() - format_desc_.fps) < 0.1) // format == flash -> simple\r
 470                                 {\r
 471                                         auto frame = render_frame();\r
 472                                         frame_buffer_.push(frame);\r
 473                                 }\r
 474                                                 \r
 475                                 fps_.fetch_and_store(static_cast<int>(renderer_->fps()*100.0));                         \r
 476                                 graph_->set_text(print());\r
 477                         \r
 478                                 if(renderer_->is_empty())                       \r
 479                                         renderer_.reset();\r
 480                         }\r
 481 \r
 482                         output_buffer_.push(std::move(frame_buffer_.front()));\r
 483                         frame_buffer_.pop();\r
 484                 });\r
 485         }\r
 486 \r
 487         safe_ptr<core::basic_frame> render_frame()\r
 488         {       \r
 489                 double ratio = std::min(1.0, static_cast<double>(output_buffer_.size())/static_cast<double>(std::max(1, buffer_size_ - 1)));\r
 490                 double sync  = 2*ratio - ratio*ratio;\r
 491 \r
 492                 auto frame = renderer_->render_frame(sync);\r
 493                 lock(last_frame_mutex_, [&]\r
 494                 {\r
 495                         last_frame_ = frame;\r
 496                 });\r
 497                 return frame;\r
 498         }\r
 499 \r
 500         core::monitor::source& monitor_output()\r
 501         {\r
 502                 return monitor_subject_;\r
 503         }\r
 504 };\r
 505 \r
 506 safe_ptr<core::frame_producer> create_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params)\r
 507 {\r
 508         auto template_host = get_template_host(frame_factory->get_video_format_desc());\r
 509         \r
 510         auto filename = env::template_folder() + L"\\" + template_host.filename;\r
 511         \r
 512         if(!boost::filesystem::exists(filename))\r
 513                 BOOST_THROW_EXCEPTION(file_not_found() << boost::errinfo_file_name(narrow(filename)));  \r
 514 \r
 515         return create_producer_destroy_proxy(\r
 516                    create_producer_print_proxy(\r
 517                         make_safe<flash_producer>(frame_factory, filename, template_host.width, template_host.height)));\r
 518 }\r
 519 \r
 520 safe_ptr<core::frame_producer> create_swf_producer(const safe_ptr<core::frame_factory>& frame_factory, const std::vector<std::wstring>& params) \r
 521 {\r
 522         auto filename = env::media_folder() + L"\\" + params.at(0) + L".swf";\r
 523         \r
 524         if(!boost::filesystem::exists(filename))\r
 525                 return core::frame_producer::empty();\r
 526 \r
 527         swf_t::header_t header(filename);\r
 528 \r
 529         return create_producer_destroy_proxy(\r
 530                    create_producer_print_proxy(\r
 531                         make_safe<flash_producer>(frame_factory, filename, header.frame_width, header.frame_height)));\r
 532 }\r
 533 \r
 534 std::wstring find_template(const std::wstring& template_name)\r
 535 {\r
 536         if(boost::filesystem::exists(template_name + L".ft")) \r
 537                 return template_name + L".ft";\r
 538         \r
 539         if(boost::filesystem::exists(template_name + L".ct"))\r
 540                 return template_name + L".ct";\r
 541         \r
 542         if(boost::filesystem::exists(template_name + L".swf"))\r
 543                 return template_name + L".swf";\r
 544 \r
 545         return L"";\r
 546 }\r
 547 \r
 548 }}