git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/util/util.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 #include "util.h"\r
  25 \r
  26 #include "flv.h"\r
  27 \r
  28 #include "../tbb_avcodec.h"\r
  29 #include "../../ffmpeg_error.h"\r
  30 \r
  31 #include <tbb/concurrent_unordered_map.h>\r
  32 #include <tbb/concurrent_queue.h>\r
  33 \r
  34 #include <core/producer/frame/frame_transform.h>\r
  35 #include <core/producer/frame/frame_factory.h>\r
  36 #include <core/producer/frame_producer.h>\r
  37 #include <core/mixer/write_frame.h>\r
  38 \r
  39 #include <common/exception/exceptions.h>\r
  40 #include <common/utility/assert.h>\r
  41 #include <common/memory/memcpy.h>\r
  42 \r
  43 #include <tbb/parallel_for.h>\r
  44 \r
  45 #include <boost/filesystem.hpp>\r
  46 #include <boost/lexical_cast.hpp>\r
  47 \r
  48 #if defined(_MSC_VER)\r
  49 #pragma warning (push)\r
  50 #pragma warning (disable : 4244)\r
  51 #endif\r
  52 extern "C" \r
  53 {\r
  54         #include <libswscale/swscale.h>\r
  55         #include <libavcodec/avcodec.h>\r
  56         #include <libavformat/avformat.h>\r
  57 }\r
  58 #if defined(_MSC_VER)\r
  59 #pragma warning (pop)\r
  60 #endif\r
  61 \r
  62 namespace caspar { namespace ffmpeg {\r
  63                 \r
  64 std::shared_ptr<core::audio_buffer> flush_audio()\r
  65 {\r
  66         static std::shared_ptr<core::audio_buffer> audio(new core::audio_buffer());\r
  67         return audio;\r
  68 }\r
  69 \r
  70 std::shared_ptr<core::audio_buffer> empty_audio()\r
  71 {\r
  72         static std::shared_ptr<core::audio_buffer> audio(new core::audio_buffer());\r
  73         return audio;\r
  74 }\r
  75 \r
  76 std::shared_ptr<AVFrame>                        flush_video()\r
  77 {\r
  78         static std::shared_ptr<AVFrame> video(avcodec_alloc_frame(), av_free);\r
  79         return video;\r
  80 }\r
  81 \r
  82 std::shared_ptr<AVFrame>                        empty_video()\r
  83 {\r
  84         static std::shared_ptr<AVFrame> video(avcodec_alloc_frame(), av_free);\r
  85         return video;\r
  86 }\r
  87 \r
  88 core::field_mode::type get_mode(const AVFrame& frame)\r
  89 {\r
  90         if(!frame.interlaced_frame)\r
  91                 return core::field_mode::progressive;\r
  92 \r
  93         return frame.top_field_first ? core::field_mode::upper : core::field_mode::lower;\r
  94 }\r
  95 \r
  96 core::pixel_format::type get_pixel_format(PixelFormat pix_fmt)\r
  97 {\r
  98         switch(pix_fmt)\r
  99         {\r
 100         case CASPAR_PIX_FMT_LUMA:       return core::pixel_format::luma;\r
 101         case PIX_FMT_GRAY8:                     return core::pixel_format::gray;\r
 102         case PIX_FMT_BGRA:                      return core::pixel_format::bgra;\r
 103         case PIX_FMT_ARGB:                      return core::pixel_format::argb;\r
 104         case PIX_FMT_RGBA:                      return core::pixel_format::rgba;\r
 105         case PIX_FMT_ABGR:                      return core::pixel_format::abgr;\r
 106         case PIX_FMT_YUV444P:           return core::pixel_format::ycbcr;\r
 107         case PIX_FMT_YUV422P:           return core::pixel_format::ycbcr;\r
 108         case PIX_FMT_YUV420P:           return core::pixel_format::ycbcr;\r
 109         case PIX_FMT_YUV411P:           return core::pixel_format::ycbcr;\r
 110         case PIX_FMT_YUV410P:           return core::pixel_format::ycbcr;\r
 111         case PIX_FMT_YUVA420P:          return core::pixel_format::ycbcra;\r
 112         default:                                        return core::pixel_format::invalid;\r
 113         }\r
 114 }\r
 115 \r
 116 core::pixel_format_desc get_pixel_format_desc(PixelFormat pix_fmt, size_t width, size_t height)\r
 117 {\r
 118         // Get linesizes\r
 119         AVPicture dummy_pict;   \r
 120         avpicture_fill(&dummy_pict, nullptr, pix_fmt == CASPAR_PIX_FMT_LUMA ? PIX_FMT_GRAY8 : pix_fmt, width, height);\r
 121 \r
 122         core::pixel_format_desc desc;\r
 123         desc.pix_fmt = get_pixel_format(pix_fmt);\r
 124                 \r
 125         switch(desc.pix_fmt)\r
 126         {\r
 127         case core::pixel_format::gray:\r
 128         case core::pixel_format::luma:\r
 129                 {\r
 130                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));                                               \r
 131                         return desc;\r
 132                 }\r
 133         case core::pixel_format::bgra:\r
 134         case core::pixel_format::argb:\r
 135         case core::pixel_format::rgba:\r
 136         case core::pixel_format::abgr:\r
 137                 {\r
 138                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 4));                                             \r
 139                         return desc;\r
 140                 }\r
 141         case core::pixel_format::ycbcr:\r
 142         case core::pixel_format::ycbcra:\r
 143                 {               \r
 144                         // Find chroma height\r
 145                         size_t size2 = dummy_pict.data[2] - dummy_pict.data[1];\r
 146                         size_t h2 = size2/dummy_pict.linesize[1];                       \r
 147 \r
 148                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));\r
 149                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[1], h2, 1));\r
 150                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[2], h2, 1));\r
 151 \r
 152                         if(desc.pix_fmt == core::pixel_format::ycbcra)                                          \r
 153                                 desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[3], height, 1));       \r
 154                         return desc;\r
 155                 }               \r
 156         default:                \r
 157                 desc.pix_fmt = core::pixel_format::invalid;\r
 158                 return desc;\r
 159         }\r
 160 }\r
 161 \r
 162 int make_alpha_format(int format)\r
 163 {\r
 164         switch(get_pixel_format(static_cast<PixelFormat>(format)))\r
 165         {\r
 166         case core::pixel_format::ycbcr:\r
 167         case core::pixel_format::ycbcra:\r
 168                 return CASPAR_PIX_FMT_LUMA;\r
 169         default:\r
 170                 return format;\r
 171         }\r
 172 }\r
 173 \r
 174 safe_ptr<core::write_frame> make_write_frame(const void* tag, const safe_ptr<AVFrame>& decoded_frame, const safe_ptr<core::frame_factory>& frame_factory, int hints)\r
 175 {                       \r
 176         static tbb::concurrent_unordered_map<int64_t, tbb::concurrent_queue<std::shared_ptr<SwsContext>>> sws_contexts_;\r
 177         \r
 178         if(decoded_frame->width < 1 || decoded_frame->height < 1)\r
 179                 return make_safe<core::write_frame>(tag);\r
 180 \r
 181         const auto width  = decoded_frame->width;\r
 182         const auto height = decoded_frame->height;\r
 183         auto desc                 = get_pixel_format_desc(static_cast<PixelFormat>(decoded_frame->format), width, height);\r
 184         \r
 185         if(hints & core::frame_producer::ALPHA_HINT)\r
 186                 desc = get_pixel_format_desc(static_cast<PixelFormat>(make_alpha_format(decoded_frame->format)), width, height);\r
 187 \r
 188         std::shared_ptr<core::write_frame> write;\r
 189 \r
 190         if(desc.pix_fmt == core::pixel_format::invalid)\r
 191         {\r
 192                 auto pix_fmt = static_cast<PixelFormat>(decoded_frame->format);\r
 193                 auto target_pix_fmt = PIX_FMT_BGRA;\r
 194 \r
 195                 if(pix_fmt == PIX_FMT_UYVY422)\r
 196                         target_pix_fmt = PIX_FMT_YUV422P;\r
 197                 else if(pix_fmt == PIX_FMT_YUYV422)\r
 198                         target_pix_fmt = PIX_FMT_YUV422P;\r
 199                 else if(pix_fmt == PIX_FMT_UYYVYY411)\r
 200                         target_pix_fmt = PIX_FMT_YUV411P;\r
 201                 else if(pix_fmt == PIX_FMT_YUV420P10)\r
 202                         target_pix_fmt = PIX_FMT_YUV420P;\r
 203                 else if(pix_fmt == PIX_FMT_YUV422P10)\r
 204                         target_pix_fmt = PIX_FMT_YUV422P;\r
 205                 else if(pix_fmt == PIX_FMT_YUV444P10)\r
 206                         target_pix_fmt = PIX_FMT_YUV444P;\r
 207                 \r
 208                 auto target_desc = get_pixel_format_desc(target_pix_fmt, width, height);\r
 209 \r
 210                 write = frame_factory->create_frame(tag, target_desc);\r
 211                 write->set_type(get_mode(*decoded_frame));\r
 212 \r
 213                 std::shared_ptr<SwsContext> sws_context;\r
 214 \r
 215                 //CASPAR_LOG(warning) << "Hardware accelerated color transform not supported.";\r
 216                 \r
 217                 int64_t key = ((static_cast<int64_t>(width)                      << 32) & 0xFFFF00000000) | \r
 218                                           ((static_cast<int64_t>(height)                 << 16) & 0xFFFF0000) | \r
 219                                           ((static_cast<int64_t>(pix_fmt)                <<  8) & 0xFF00) | \r
 220                                           ((static_cast<int64_t>(target_pix_fmt) <<  0) & 0xFF);\r
 221                         \r
 222                 auto& pool = sws_contexts_[key];\r
 223                                                 \r
 224                 if(!pool.try_pop(sws_context))\r
 225                 {\r
 226                         double param;\r
 227                         sws_context.reset(sws_getContext(width, height, pix_fmt, width, height, target_pix_fmt, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);\r
 228                 }\r
 229                         \r
 230                 if(!sws_context)\r
 231                 {\r
 232                         BOOST_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling context.") << \r
 233                                                                         boost::errinfo_api_function("sws_getContext"));\r
 234                 }       \r
 235                 \r
 236                 safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 237                 avcodec_get_frame_defaults(av_frame.get());                     \r
 238                 if(target_pix_fmt == PIX_FMT_BGRA)\r
 239                 {\r
 240                         auto size = avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), write->image_data().begin(), PIX_FMT_BGRA, width, height);\r
 241                         CASPAR_VERIFY(size == write->image_data().size()); \r
 242                 }\r
 243                 else\r
 244                 {\r
 245                         av_frame->width  = width;\r
 246                         av_frame->height = height;\r
 247                         for(size_t n = 0; n < target_desc.planes.size(); ++n)\r
 248                         {\r
 249                                 av_frame->data[n]               = write->image_data(n).begin();\r
 250                                 av_frame->linesize[n]   = target_desc.planes[n].linesize;\r
 251                         }\r
 252                 }\r
 253 \r
 254                 sws_scale(sws_context.get(), decoded_frame->data, decoded_frame->linesize, 0, height, av_frame->data, av_frame->linesize);      \r
 255                 pool.push(sws_context);\r
 256 \r
 257                 write->commit();                \r
 258         }\r
 259         else\r
 260         {\r
 261                 write = frame_factory->create_frame(tag, desc);\r
 262                 write->set_type(get_mode(*decoded_frame));\r
 263 \r
 264                 for(int n = 0; n < static_cast<int>(desc.planes.size()); ++n)\r
 265                 {\r
 266                         auto plane            = desc.planes[n];\r
 267                         auto result           = write->image_data(n).begin();\r
 268                         auto decoded          = decoded_frame->data[n];\r
 269                         auto decoded_linesize = decoded_frame->linesize[n];\r
 270                         \r
 271                         CASPAR_ASSERT(decoded);\r
 272                         CASPAR_ASSERT(write->image_data(n).begin());\r
 273 \r
 274                         if(decoded_linesize != static_cast<int>(plane.width))\r
 275                         {\r
 276                                 // Copy line by line since ffmpeg sometimes pads each line.\r
 277                                 tbb::parallel_for<size_t>(0, desc.planes[n].height, [&](size_t y)\r
 278                                 {\r
 279                                         fast_memcpy(result + y*plane.linesize, decoded + y*decoded_linesize, plane.linesize);\r
 280                                 });\r
 281                         }\r
 282                         else\r
 283                         {\r
 284                                 fast_memcpy(result, decoded, plane.size);\r
 285                         }\r
 286 \r
 287                         write->commit(n);\r
 288                 }\r
 289         }\r
 290 \r
 291         if(decoded_frame->height == 480) // NTSC DV\r
 292         {\r
 293                 write->get_frame_transform().fill_translation[1] += 2.0/static_cast<double>(frame_factory->get_video_format_desc().height);\r
 294                 write->get_frame_transform().fill_scale[1] = 1.0 - 6.0*1.0/static_cast<double>(frame_factory->get_video_format_desc().height);\r
 295         }\r
 296         \r
 297         // Fix field-order if needed\r
 298         if(write->get_type() == core::field_mode::lower && frame_factory->get_video_format_desc().field_mode == core::field_mode::upper)\r
 299                 write->get_frame_transform().fill_translation[1] += 1.0/static_cast<double>(frame_factory->get_video_format_desc().height);\r
 300         else if(write->get_type() == core::field_mode::upper && frame_factory->get_video_format_desc().field_mode == core::field_mode::lower)\r
 301                 write->get_frame_transform().fill_translation[1] -= 1.0/static_cast<double>(frame_factory->get_video_format_desc().height);\r
 302 \r
 303         return make_safe_ptr(write);\r
 304 }\r
 305 \r
 306 bool is_sane_fps(AVRational time_base)\r
 307 {\r
 308         double fps = static_cast<double>(time_base.den) / static_cast<double>(time_base.num);\r
 309         return fps > 20.0 && fps < 65.0;\r
 310 }\r
 311 \r
 312 AVRational fix_time_base(AVRational time_base)\r
 313 {\r
 314         if(time_base.num == 1)\r
 315                 time_base.num = static_cast<int>(std::pow(10.0, static_cast<int>(std::log10(static_cast<float>(time_base.den)))-1));    \r
 316                         \r
 317         if(!is_sane_fps(time_base))\r
 318         {\r
 319                 auto tmp = time_base;\r
 320                 tmp.den /= 2;\r
 321                 if(is_sane_fps(tmp))\r
 322                         time_base = tmp;\r
 323         }\r
 324 \r
 325         return time_base;\r
 326 }\r
 327 \r
 328 double read_fps(AVFormatContext& context, double fail_value)\r
 329 {                                               \r
 330         auto video_index = av_find_best_stream(&context, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 331         auto audio_index = av_find_best_stream(&context, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);\r
 332         \r
 333         if(video_index > -1)\r
 334         {\r
 335                 const auto video_context = context.streams[video_index]->codec;\r
 336                 const auto video_stream  = context.streams[video_index];\r
 337                                                 \r
 338                 AVRational time_base = video_context->time_base;\r
 339 \r
 340                 if(boost::filesystem2::path(context.filename).extension() == ".flv")\r
 341                 {\r
 342                         try\r
 343                         {\r
 344                                 auto meta = read_flv_meta_info(context.filename);\r
 345                                 return boost::lexical_cast<double>(meta["framerate"]);\r
 346                         }\r
 347                         catch(...)\r
 348                         {\r
 349                                 return 0.0;\r
 350                         }\r
 351                 }\r
 352                 else\r
 353                 {\r
 354                         time_base.num *= video_context->ticks_per_frame;\r
 355 \r
 356                         if(!is_sane_fps(time_base))\r
 357                         {                       \r
 358                                 time_base = fix_time_base(time_base);\r
 359 \r
 360                                 if(!is_sane_fps(time_base) && audio_index > -1)\r
 361                                 {\r
 362                                         auto& audio_context = *context.streams[audio_index]->codec;\r
 363                                         auto& audio_stream  = *context.streams[audio_index];\r
 364 \r
 365                                         double duration_sec = audio_stream.duration / static_cast<double>(audio_context.sample_rate);\r
 366                                                                 \r
 367                                         time_base.num = static_cast<int>(duration_sec*100000.0);\r
 368                                         time_base.den = static_cast<int>(video_stream->nb_frames*100000);\r
 369                                 }\r
 370                         }\r
 371                 }\r
 372                 \r
 373                 double fps = static_cast<double>(time_base.den) / static_cast<double>(time_base.num);\r
 374 \r
 375                 double closest_fps = 0.0;\r
 376                 for(int n = 0; n < core::video_format::count; ++n)\r
 377                 {\r
 378                         auto format = core::video_format_desc::get(static_cast<core::video_format::type>(n));\r
 379 \r
 380                         double diff1 = std::abs(format.fps - fps);\r
 381                         double diff2 = std::abs(closest_fps - fps);\r
 382 \r
 383                         if(diff1 < diff2)\r
 384                                 closest_fps = format.fps;\r
 385                 }\r
 386         \r
 387                 return closest_fps;\r
 388         }\r
 389 \r
 390         return fail_value;      \r
 391 }\r
 392 \r
 393 void fix_meta_data(AVFormatContext& context)\r
 394 {\r
 395         auto video_index = av_find_best_stream(&context, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 396 \r
 397         if(video_index > -1)\r
 398         {\r
 399                 auto video_stream   = context.streams[video_index];\r
 400                 auto video_context  = context.streams[video_index]->codec;\r
 401                                                 \r
 402                 if(boost::filesystem2::path(context.filename).extension() == ".flv")\r
 403                 {\r
 404                         try\r
 405                         {\r
 406                                 auto meta = read_flv_meta_info(context.filename);\r
 407                                 double fps = boost::lexical_cast<double>(meta["framerate"]);\r
 408                                 video_stream->nb_frames = static_cast<int64_t>(boost::lexical_cast<double>(meta["duration"])*fps);\r
 409                         }\r
 410                         catch(...){}\r
 411                 }\r
 412                 else\r
 413                 {\r
 414                         auto stream_time = video_stream->time_base;\r
 415                         auto duration    = video_stream->duration;\r
 416                         auto codec_time  = video_context->time_base;\r
 417                         auto ticks               = video_context->ticks_per_frame;\r
 418 \r
 419                         if(video_stream->nb_frames == 0)\r
 420                                 video_stream->nb_frames = (duration*stream_time.num*codec_time.den)/(stream_time.den*codec_time.num*ticks);     \r
 421                 }\r
 422         }\r
 423 }\r
 424 \r
 425 safe_ptr<AVPacket> create_packet()\r
 426 {\r
 427         safe_ptr<AVPacket> packet(new AVPacket, [](AVPacket* p)\r
 428         {\r
 429                 av_free_packet(p);\r
 430                 delete p;\r
 431         });\r
 432         \r
 433         av_init_packet(packet.get());\r
 434         return packet;\r
 435 }\r
 436 \r
 437 safe_ptr<AVCodecContext> open_codec(AVFormatContext& context, enum AVMediaType type, int& index)\r
 438 {       \r
 439         AVCodec* decoder;\r
 440         index = THROW_ON_ERROR2(av_find_best_stream(&context, type, -1, -1, &decoder, 0), "");\r
 441         //if(strcmp(decoder->name, "prores") == 0 && decoder->next && strcmp(decoder->next->name, "prores_lgpl") == 0)\r
 442         //      decoder = decoder->next;\r
 443 \r
 444         THROW_ON_ERROR2(tbb_avcodec_open(context.streams[index]->codec, decoder), "");\r
 445         return safe_ptr<AVCodecContext>(context.streams[index]->codec, tbb_avcodec_close);\r
 446 }\r
 447 \r
 448 safe_ptr<AVFormatContext> open_input(const std::wstring& filename)\r
 449 {\r
 450         AVFormatContext* weak_context = nullptr;\r
 451         THROW_ON_ERROR2(avformat_open_input(&weak_context, narrow(filename).c_str(), nullptr, nullptr), filename);\r
 452         safe_ptr<AVFormatContext> context(weak_context, av_close_input_file);                   \r
 453         THROW_ON_ERROR2(avformat_find_stream_info(weak_context, nullptr), filename);\r
 454         fix_meta_data(*context);\r
 455         return context;\r
 456 }\r
 457 \r
 458 std::wstring print_mode(size_t width, size_t height, double fps, bool interlaced)\r
 459 {\r
 460         std::wostringstream fps_ss;\r
 461         fps_ss << std::fixed << std::setprecision(2) << (!interlaced ? fps : 2.0 * fps);\r
 462 \r
 463         return boost::lexical_cast<std::wstring>(width) + L"x" + boost::lexical_cast<std::wstring>(height) + (!interlaced ? L"p" : L"i") + fps_ss.str();\r
 464 }\r
 465 \r
 466 bool is_valid_file(const std::wstring filename, const std::vector<std::wstring>& invalid_exts)\r
 467 {\r
 468         static std::vector<std::wstring> valid_exts = boost::assign::list_of(L".m2t")(L".mov")(L".mp4")(L".dv")(L".flv")(L".mpg")(L".wav")(L".mp3")(L".dnxhd")(L".h264")(L".prores");\r
 469 \r
 470         auto ext = boost::to_lower_copy(boost::filesystem::wpath(filename).extension());\r
 471                 \r
 472         if(std::find(invalid_exts.begin(), invalid_exts.end(), ext) != invalid_exts.end())\r
 473                 return false;   \r
 474 \r
 475         if(std::find(valid_exts.begin(), valid_exts.end(), ext) != valid_exts.end())\r
 476                 return true;    \r
 477 \r
 478         auto filename2 = narrow(filename);\r
 479 \r
 480         if(boost::filesystem::path(filename2).extension() == ".m2t")\r
 481                 return true;\r
 482 \r
 483         std::ifstream file(filename);\r
 484 \r
 485         std::vector<unsigned char> buf;\r
 486         for(auto file_it = std::istreambuf_iterator<char>(file); file_it != std::istreambuf_iterator<char>() && buf.size() < 2048; ++file_it)\r
 487                 buf.push_back(*file_it);\r
 488 \r
 489         if(buf.empty())\r
 490                 return nullptr;\r
 491 \r
 492         AVProbeData pb;\r
 493         pb.filename = filename2.c_str();\r
 494         pb.buf          = buf.data();\r
 495         pb.buf_size = buf.size();\r
 496 \r
 497         int score = 0;\r
 498         return av_probe_input_format2(&pb, true, &score) != nullptr;\r
 499 }\r
 500 \r
 501 bool is_valid_file(const std::wstring filename)\r
 502 {\r
 503         static const std::vector<std::wstring> invalid_exts = boost::assign::list_of(L".png")(L".tga")(L".bmp")(L".jpg")(L".jpeg")(L".gif")(L".tiff")(L".tif")(L".jp2")(L".jpx")(L".j2k")(L".j2c")(L".swf")(L".ct");\r
 504         \r
 505         return is_valid_file(filename, invalid_exts);\r
 506 }\r
 507 \r
 508 std::wstring probe_stem(const std::wstring stem, const std::vector<std::wstring>& invalid_exts)\r
 509 {\r
 510         auto stem2 = boost::filesystem2::wpath(stem);\r
 511         auto dir = stem2.parent_path();\r
 512         for(auto it = boost::filesystem2::wdirectory_iterator(dir); it != boost::filesystem2::wdirectory_iterator(); ++it)\r
 513         {\r
 514                 if(boost::iequals(it->path().stem(), stem2.filename()) && is_valid_file(it->path().file_string(), invalid_exts))\r
 515                         return it->path().file_string();\r
 516         }\r
 517         return L"";\r
 518 }\r
 519 //\r
 520 //void av_dup_frame(AVFrame* frame)\r
 521 //{\r
 522 //      AVFrame* new_frame = avcodec_alloc_frame();\r
 523 //\r
 524 //\r
 525 //      const uint8_t *src_data[4] = {0};\r
 526 //      memcpy(const_cast<uint8_t**>(&src_data[0]), frame->data, 4);\r
 527 //      const int src_linesizes[4] = {0};\r
 528 //      memcpy(const_cast<int*>(&src_linesizes[0]), frame->linesize, 4);\r
 529 //\r
 530 //      av_image_alloc(new_frame->data, new_frame->linesize, new_frame->width, new_frame->height, frame->format, 16);\r
 531 //\r
 532 //      av_image_copy(new_frame->data, new_frame->linesize, src_data, src_linesizes, frame->format, new_frame->width, new_frame->height);\r
 533 //\r
 534 //      frame =\r
 535 //}\r
 536 \r
 537 }}