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/frame/frame_transform.h>\r
  35 #include <core/frame/frame_factory.h>\r
  36 #include <core/frame/frame.h>\r
  37 #include <core/producer/frame_producer.h>\r
  38 \r
  39 #include <common/except.h>\r
  40 #include <common/array.h>\r
  41 \r
  42 #include <tbb/parallel_for.h>\r
  43 \r
  44 #include <common/assert.h>\r
  45 #include <boost/filesystem.hpp>\r
  46 #include <boost/lexical_cast.hpp>\r
  47 \r
  48 #include <asmlib.h>\r
  49 \r
  50 #if defined(_MSC_VER)\r
  51 #pragma warning (push)\r
  52 #pragma warning (disable : 4244)\r
  53 #endif\r
  54 extern "C" \r
  55 {\r
  56         #include <libswscale/swscale.h>\r
  57         #include <libavcodec/avcodec.h>\r
  58         #include <libavformat/avformat.h>\r
  59 }\r
  60 #if defined(_MSC_VER)\r
  61 #pragma warning (pop)\r
  62 #endif\r
  63 \r
  64 namespace caspar { namespace ffmpeg {\r
  65                 \r
  66 core::field_mode get_mode(const AVFrame& frame)\r
  67 {\r
  68         if(!frame.interlaced_frame)\r
  69                 return core::field_mode::progressive;\r
  70 \r
  71         return frame.top_field_first ? core::field_mode::upper : core::field_mode::lower;\r
  72 }\r
  73 \r
  74 core::pixel_format get_pixel_format(PixelFormat pix_fmt)\r
  75 {\r
  76         switch(pix_fmt)\r
  77         {\r
  78         case PIX_FMT_GRAY8:                     return core::pixel_format::gray;\r
  79         case PIX_FMT_RGB24:                     return core::pixel_format::rgb;\r
  80         case PIX_FMT_BGR24:                     return core::pixel_format::bgr;\r
  81         case PIX_FMT_BGRA:                      return core::pixel_format::bgra;\r
  82         case PIX_FMT_ARGB:                      return core::pixel_format::argb;\r
  83         case PIX_FMT_RGBA:                      return core::pixel_format::rgba;\r
  84         case PIX_FMT_ABGR:                      return core::pixel_format::abgr;\r
  85         case PIX_FMT_YUV444P:           return core::pixel_format::ycbcr;\r
  86         case PIX_FMT_YUV422P:           return core::pixel_format::ycbcr;\r
  87         case PIX_FMT_YUV420P:           return core::pixel_format::ycbcr;\r
  88         case PIX_FMT_YUV411P:           return core::pixel_format::ycbcr;\r
  89         case PIX_FMT_YUV410P:           return core::pixel_format::ycbcr;\r
  90         case PIX_FMT_YUVA420P:          return core::pixel_format::ycbcra;\r
  91         default:                                        return core::pixel_format::invalid;\r
  92         }\r
  93 }\r
  94 \r
  95 core::pixel_format_desc pixel_format_desc(PixelFormat pix_fmt, int width, int height)\r
  96 {\r
  97         // Get linesizes\r
  98         AVPicture dummy_pict;   \r
  99         avpicture_fill(&dummy_pict, nullptr, pix_fmt, width, height);\r
 100 \r
 101         core::pixel_format_desc desc = get_pixel_format(pix_fmt);\r
 102                 \r
 103         switch(desc.format.value())\r
 104         {\r
 105         case core::pixel_format::gray:\r
 106         case core::pixel_format::luma:\r
 107                 {\r
 108                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));                                               \r
 109                         return desc;\r
 110                 }\r
 111         case core::pixel_format::bgr:\r
 112         case core::pixel_format::rgb:\r
 113                 {\r
 114                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/3, height, 3));                                             \r
 115                         return desc;\r
 116                 }\r
 117         case core::pixel_format::bgra:\r
 118         case core::pixel_format::argb:\r
 119         case core::pixel_format::rgba:\r
 120         case core::pixel_format::abgr:\r
 121                 {\r
 122                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0]/4, height, 4));                                             \r
 123                         return desc;\r
 124                 }\r
 125         case core::pixel_format::ycbcr:\r
 126         case core::pixel_format::ycbcra:\r
 127                 {               \r
 128                         // Find chroma height\r
 129                         int size2 = static_cast<int>(dummy_pict.data[2] - dummy_pict.data[1]);\r
 130                         int h2 = size2/dummy_pict.linesize[1];                  \r
 131 \r
 132                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));\r
 133                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[1], h2, 1));\r
 134                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[2], h2, 1));\r
 135 \r
 136                         if(desc.format == core::pixel_format::ycbcra)                                           \r
 137                                 desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[3], height, 1));       \r
 138                         return desc;\r
 139                 }               \r
 140         default:                \r
 141                 desc.format = core::pixel_format::invalid;\r
 142                 return desc;\r
 143         }\r
 144 }\r
 145 \r
 146 core::mutable_frame make_frame(const void* tag, const spl::shared_ptr<AVFrame>& decoded_frame, double fps, core::frame_factory& frame_factory)\r
 147 {                       \r
 148         static tbb::concurrent_unordered_map<int64_t, tbb::concurrent_queue<std::shared_ptr<SwsContext>>> sws_contvalid_exts_;\r
 149         \r
 150         if(decoded_frame->width < 1 || decoded_frame->height < 1)\r
 151                 return frame_factory.create_frame(tag, core::pixel_format_desc(core::pixel_format::invalid));\r
 152 \r
 153         const auto width  = decoded_frame->width;\r
 154         const auto height = decoded_frame->height;\r
 155         auto desc                 = pixel_format_desc(static_cast<PixelFormat>(decoded_frame->format), width, height);\r
 156                 \r
 157         if(desc.format == core::pixel_format::invalid)\r
 158         {\r
 159                 auto pix_fmt = static_cast<PixelFormat>(decoded_frame->format);\r
 160                 auto target_pix_fmt = PIX_FMT_BGRA;\r
 161 \r
 162                 if(pix_fmt == PIX_FMT_UYVY422)\r
 163                         target_pix_fmt = PIX_FMT_YUV422P;\r
 164                 else if(pix_fmt == PIX_FMT_YUYV422)\r
 165                         target_pix_fmt = PIX_FMT_YUV422P;\r
 166                 else if(pix_fmt == PIX_FMT_UYYVYY411)\r
 167                         target_pix_fmt = PIX_FMT_YUV411P;\r
 168                 else if(pix_fmt == PIX_FMT_YUV420P10)\r
 169                         target_pix_fmt = PIX_FMT_YUV420P;\r
 170                 else if(pix_fmt == PIX_FMT_YUV422P10)\r
 171                         target_pix_fmt = PIX_FMT_YUV422P;\r
 172                 else if(pix_fmt == PIX_FMT_YUV444P10)\r
 173                         target_pix_fmt = PIX_FMT_YUV444P;\r
 174                 \r
 175                 auto target_desc = pixel_format_desc(target_pix_fmt, width, height);\r
 176 \r
 177                 auto write = frame_factory.create_frame(tag, target_desc);\r
 178 \r
 179                 std::shared_ptr<SwsContext> sws_context;\r
 180 \r
 181                 //CASPAR_LOG(warning) << "Hardware accelerated color transform not supported.";\r
 182                 \r
 183                 int64_t key = ((static_cast<int64_t>(width)                      << 32) & 0xFFFF00000000) | \r
 184                                           ((static_cast<int64_t>(height)                 << 16) & 0xFFFF0000) | \r
 185                                           ((static_cast<int64_t>(pix_fmt)                <<  8) & 0xFF00) | \r
 186                                           ((static_cast<int64_t>(target_pix_fmt) <<  0) & 0xFF);\r
 187                         \r
 188                 auto& pool = sws_contvalid_exts_[key];\r
 189                                                 \r
 190                 if(!pool.try_pop(sws_context))\r
 191                 {\r
 192                         double param;\r
 193                         sws_context.reset(sws_getContext(width, height, pix_fmt, width, height, target_pix_fmt, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);\r
 194                 }\r
 195                         \r
 196                 if(!sws_context)\r
 197                 {\r
 198                         CASPAR_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling context.") << \r
 199                                                                         boost::errinfo_api_function("sws_getContext"));\r
 200                 }       \r
 201                 \r
 202                 spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);      \r
 203                 avcodec_get_frame_defaults(av_frame.get());                     \r
 204                 if(target_pix_fmt == PIX_FMT_BGRA)\r
 205                 {\r
 206                         auto size = avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), write.image_data(0).begin(), PIX_FMT_BGRA, width, height);\r
 207                         CASPAR_VERIFY(size == write.image_data(0).size()); \r
 208                 }\r
 209                 else\r
 210                 {\r
 211                         av_frame->width  = width;\r
 212                         av_frame->height = height;\r
 213                         for(int n = 0; n < target_desc.planes.size(); ++n)\r
 214                         {\r
 215                                 av_frame->data[n]               = write.image_data(n).begin();\r
 216                                 av_frame->linesize[n]   = target_desc.planes[n].linesize;\r
 217                         }\r
 218                 }\r
 219 \r
 220                 sws_scale(sws_context.get(), decoded_frame->data, decoded_frame->linesize, 0, height, av_frame->data, av_frame->linesize);      \r
 221                 pool.push(sws_context); \r
 222 \r
 223                 return std::move(write);\r
 224         }\r
 225         else\r
 226         {\r
 227                 auto write = frame_factory.create_frame(tag, desc);\r
 228                 \r
 229                 for(int n = 0; n < static_cast<int>(desc.planes.size()); ++n)\r
 230                 {\r
 231                         auto plane            = desc.planes[n];\r
 232                         auto result           = write.image_data(n).begin();\r
 233                         auto decoded          = decoded_frame->data[n];\r
 234                         auto decoded_linesize = decoded_frame->linesize[n];\r
 235                         \r
 236                         CASPAR_ASSERT(decoded);\r
 237                         CASPAR_ASSERT(write.image_data(n).begin());\r
 238 \r
 239                         // Copy line by line since ffmpeg sometimes pads each line.\r
 240                         tbb::affinity_partitioner ap;\r
 241                         tbb::parallel_for(tbb::blocked_range<int>(0, desc.planes[n].height), [&](const tbb::blocked_range<int>& r)\r
 242                         {\r
 243                                 for(int y = r.begin(); y != r.end(); ++y)\r
 244                                         A_memcpy(result + y*plane.linesize, decoded + y*decoded_linesize, plane.linesize);\r
 245                         }, ap);\r
 246                 }\r
 247         \r
 248                 return std::move(write);\r
 249         }\r
 250 }\r
 251 \r
 252 spl::shared_ptr<AVFrame> make_av_frame(core::mutable_frame& frame)\r
 253 {\r
 254         std::array<uint8_t*, 4> data = {};\r
 255         for(int n = 0; n < frame.pixel_format_desc().planes.size(); ++n)\r
 256                 data[n] = frame.image_data(n).begin();\r
 257 \r
 258         return make_av_frame(data, frame.pixel_format_desc());\r
 259 }\r
 260 \r
 261 spl::shared_ptr<AVFrame> make_av_frame(std::array<uint8_t*, 4> data, const core::pixel_format_desc& pix_desc)\r
 262 {\r
 263         spl::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);      \r
 264         avcodec_get_frame_defaults(av_frame.get());\r
 265         \r
 266         auto planes              = pix_desc.planes;\r
 267         auto format              = pix_desc.format.value();\r
 268 \r
 269         av_frame->width  = planes[0].width;\r
 270         av_frame->height = planes[0].height;\r
 271         for(int n = 0; n < planes.size(); ++n)  \r
 272         {\r
 273                 av_frame->data[n]         = data[n];\r
 274                 av_frame->linesize[n] = planes[n].linesize;     \r
 275         }\r
 276 \r
 277         switch(format)\r
 278         {\r
 279         case core::pixel_format::rgb:\r
 280                 av_frame->format = PIX_FMT_RGB24;\r
 281                 break;\r
 282         case core::pixel_format::bgr:\r
 283                 av_frame->format = PIX_FMT_BGR24;\r
 284                 break;\r
 285         case core::pixel_format::rgba:\r
 286                 av_frame->format = PIX_FMT_RGBA; \r
 287                 break;\r
 288         case core::pixel_format::argb:\r
 289                 av_frame->format = PIX_FMT_ARGB; \r
 290                 break;\r
 291         case core::pixel_format::bgra:\r
 292                 av_frame->format = PIX_FMT_BGRA; \r
 293                 break;\r
 294         case core::pixel_format::abgr:\r
 295                 av_frame->format = PIX_FMT_ABGR; \r
 296                 break;\r
 297         case core::pixel_format::gray:\r
 298                 av_frame->format = PIX_FMT_GRAY8; \r
 299                 break;\r
 300         case core::pixel_format::ycbcr:\r
 301         {\r
 302                 int y_w = planes[0].width;\r
 303                 int y_h = planes[0].height;\r
 304                 int c_w = planes[1].width;\r
 305                 int c_h = planes[1].height;\r
 306 \r
 307                 if(c_h == y_h && c_w == y_w)\r
 308                         av_frame->format = PIX_FMT_YUV444P;\r
 309                 else if(c_h == y_h && c_w*2 == y_w)\r
 310                         av_frame->format = PIX_FMT_YUV422P;\r
 311                 else if(c_h == y_h && c_w*4 == y_w)\r
 312                         av_frame->format = PIX_FMT_YUV411P;\r
 313                 else if(c_h*2 == y_h && c_w*2 == y_w)\r
 314                         av_frame->format = PIX_FMT_YUV420P;\r
 315                 else if(c_h*2 == y_h && c_w*4 == y_w)\r
 316                         av_frame->format = PIX_FMT_YUV410P;\r
 317 \r
 318                 break;\r
 319         }\r
 320         case core::pixel_format::ycbcra:\r
 321                 av_frame->format = PIX_FMT_YUVA420P;\r
 322                 break;\r
 323         }\r
 324         return av_frame;\r
 325 }\r
 326 \r
 327 bool is_sane_fps(AVRational time_base)\r
 328 {\r
 329         double fps = static_cast<double>(time_base.den) / static_cast<double>(time_base.num);\r
 330         return fps > 20.0 && fps < 65.0;\r
 331 }\r
 332 \r
 333 AVRational fix_time_base(AVRational time_base)\r
 334 {\r
 335         if(time_base.num == 1)\r
 336                 time_base.num = static_cast<int>(std::pow(10.0, static_cast<int>(std::log10(static_cast<float>(time_base.den)))-1));    \r
 337                         \r
 338         if(!is_sane_fps(time_base))\r
 339         {\r
 340                 auto tmp = time_base;\r
 341                 tmp.den /= 2;\r
 342                 if(is_sane_fps(tmp))\r
 343                         time_base = tmp;\r
 344         }\r
 345 \r
 346         return time_base;\r
 347 }\r
 348 \r
 349 double read_fps(AVFormatContext& context, double fail_value)\r
 350 {                                               \r
 351         auto video_index = av_find_best_stream(&context, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 352         auto audio_index = av_find_best_stream(&context, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);\r
 353         \r
 354         if(video_index > -1)\r
 355         {\r
 356                 const auto video_context = context.streams[video_index]->codec;\r
 357                 const auto video_stream  = context.streams[video_index];\r
 358                                                 \r
 359                 AVRational time_base = video_context->time_base;\r
 360 \r
 361                 if(boost::filesystem::path(context.filename).extension().string() == ".flv")\r
 362                 {\r
 363                         try\r
 364                         {\r
 365                                 auto meta = read_flv_meta_info(context.filename);\r
 366                                 return boost::lexical_cast<double>(meta["framerate"]);\r
 367                         }\r
 368                         catch(...)\r
 369                         {\r
 370                                 return 0.0;\r
 371                         }\r
 372                 }\r
 373                 else\r
 374                 {\r
 375                         time_base.num *= video_context->ticks_per_frame;\r
 376 \r
 377                         if(!is_sane_fps(time_base))\r
 378                         {                       \r
 379                                 time_base = fix_time_base(time_base);\r
 380 \r
 381                                 if(!is_sane_fps(time_base) && audio_index > -1)\r
 382                                 {\r
 383                                         auto& audio_context = *context.streams[audio_index]->codec;\r
 384                                         auto& audio_stream  = *context.streams[audio_index];\r
 385 \r
 386                                         double duration_sec = audio_stream.duration / static_cast<double>(audio_context.sample_rate);\r
 387                                                                 \r
 388                                         time_base.num = static_cast<int>(duration_sec*100000.0);\r
 389                                         time_base.den = static_cast<int>(video_stream->nb_frames*100000);\r
 390                                 }\r
 391                         }\r
 392                 }\r
 393                 \r
 394                 double fps = static_cast<double>(time_base.den) / static_cast<double>(time_base.num);\r
 395 \r
 396                 double closest_fps = 0.0;\r
 397                 for(int n = 0; n < core::video_format::count; ++n)\r
 398                 {\r
 399                         auto format = core::video_format_desc(core::video_format(n));\r
 400 \r
 401                         double diff1 = std::abs(format.fps - fps);\r
 402                         double diff2 = std::abs(closest_fps - fps);\r
 403 \r
 404                         if(diff1 < diff2)\r
 405                                 closest_fps = format.fps;\r
 406                 }\r
 407         \r
 408                 return closest_fps;\r
 409         }\r
 410 \r
 411         return fail_value;      \r
 412 }\r
 413 \r
 414 void fix_meta_data(AVFormatContext& context)\r
 415 {\r
 416         auto video_index = av_find_best_stream(&context, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 417 \r
 418         if(video_index > -1)\r
 419         {\r
 420                 auto video_stream   = context.streams[video_index];\r
 421                 auto video_context  = context.streams[video_index]->codec;\r
 422                                                 \r
 423                 if(boost::filesystem::path(context.filename).extension().string() == ".flv")\r
 424                 {\r
 425                         try\r
 426                         {\r
 427                                 auto meta = read_flv_meta_info(context.filename);\r
 428                                 double fps = boost::lexical_cast<double>(meta["framerate"]);\r
 429                                 video_stream->nb_frames = static_cast<int64_t>(boost::lexical_cast<double>(meta["duration"])*fps);\r
 430                         }\r
 431                         catch(...){}\r
 432                 }\r
 433                 else\r
 434                 {\r
 435                         auto stream_time = video_stream->time_base;\r
 436                         auto duration    = video_stream->duration;\r
 437                         auto codec_time  = video_context->time_base;\r
 438                         auto ticks               = video_context->ticks_per_frame;\r
 439 \r
 440                         if(video_stream->nb_frames == 0)\r
 441                                 video_stream->nb_frames = (duration*stream_time.num*codec_time.den)/(stream_time.den*codec_time.num*ticks);     \r
 442                 }\r
 443         }\r
 444 }\r
 445 \r
 446 spl::shared_ptr<AVPacket> create_packet()\r
 447 {\r
 448         spl::shared_ptr<AVPacket> packet(new AVPacket(), [](AVPacket* p)\r
 449         {\r
 450                 av_free_packet(p);\r
 451                 delete p;\r
 452         });\r
 453         \r
 454         av_init_packet(packet.get());\r
 455         return packet;\r
 456 }\r
 457 \r
 458 spl::shared_ptr<AVFrame> create_frame()\r
 459 {       \r
 460         spl::shared_ptr<AVFrame> frame(avcodec_alloc_frame(), av_free);\r
 461         avcodec_get_frame_defaults(frame.get());\r
 462         return frame;\r
 463 }\r
 464 \r
 465 spl::shared_ptr<AVCodecContext> open_codec(AVFormatContext& context, enum AVMediaType type, int& index)\r
 466 {       \r
 467         AVCodec* decoder;\r
 468         index = THROW_ON_ERROR2(av_find_best_stream(&context, type, -1, -1, &decoder, 0), "");\r
 469         //if(strcmp(decoder->name, "prores") == 0 && decoder->next && strcmp(decoder->next->name, "prores_lgpl") == 0)\r
 470         //      decoder = decoder->next;\r
 471 \r
 472         THROW_ON_ERROR2(tbb_avcodec_open(context.streams[index]->codec, decoder), "");\r
 473         return spl::shared_ptr<AVCodecContext>(context.streams[index]->codec, tbb_avcodec_close);\r
 474 }\r
 475 \r
 476 spl::shared_ptr<AVFormatContext> open_input(const std::wstring& filename)\r
 477 {\r
 478         AVFormatContext* weak_context = nullptr;\r
 479         THROW_ON_ERROR2(avformat_open_input(&weak_context, u8(filename).c_str(), nullptr, nullptr), filename);\r
 480         spl::shared_ptr<AVFormatContext> context(weak_context, av_close_input_file);                    \r
 481         THROW_ON_ERROR2(avformat_find_stream_info(weak_context, nullptr), filename);\r
 482         fix_meta_data(*context);\r
 483         return context;\r
 484 }\r
 485 \r
 486 std::wstring print_mode(int width, int height, double fps, bool interlaced)\r
 487 {\r
 488         std::wostringstream fps_ss;\r
 489         fps_ss << std::fixed << std::setprecision(2) << (!interlaced ? fps : 2.0 * fps);\r
 490 \r
 491         return boost::lexical_cast<std::wstring>(width) + L"x" + boost::lexical_cast<std::wstring>(height) + (!interlaced ? L"p" : L"i") + fps_ss.str();\r
 492 }\r
 493 \r
 494 bool is_valid_file(const std::wstring filename)\r
 495 {                               \r
 496         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
 497         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
 498 \r
 499         auto ext = boost::to_lower_copy(boost::filesystem::path(filename).extension().wstring());\r
 500                 \r
 501         if(std::find(valid_exts.begin(), valid_exts.end(), ext) != valid_exts.end())\r
 502                 return true;    \r
 503         \r
 504         if(std::find(invalid_exts.begin(), invalid_exts.end(), ext) != invalid_exts.end())\r
 505                 return false;   \r
 506 \r
 507         auto u8filename = u8(filename);\r
 508         \r
 509         int score = 0;\r
 510         AVProbeData pb = {};\r
 511         pb.filename = u8filename.c_str();\r
 512 \r
 513         if(av_probe_input_format2(&pb, false, &score) != nullptr)\r
 514                 return true;\r
 515 \r
 516         std::ifstream file(filename);\r
 517 \r
 518         std::vector<unsigned char> buf;\r
 519         for(auto file_it = std::istreambuf_iterator<char>(file); file_it != std::istreambuf_iterator<char>() && buf.size() < 1024; ++file_it)\r
 520                 buf.push_back(*file_it);\r
 521 \r
 522         if(buf.empty())\r
 523                 return nullptr;\r
 524 \r
 525         pb.buf          = buf.data();\r
 526         pb.buf_size = static_cast<int>(buf.size());\r
 527 \r
 528         return av_probe_input_format2(&pb, true, &score) != nullptr;\r
 529 }\r
 530 \r
 531 std::wstring probe_stem(const std::wstring stem)\r
 532 {\r
 533         auto stem2 = boost::filesystem::path(stem);\r
 534         auto dir = stem2.parent_path();\r
 535         for(auto it = boost::filesystem::directory_iterator(dir); it != boost::filesystem::directory_iterator(); ++it)\r
 536         {\r
 537                 if(boost::iequals(it->path().stem().wstring(), stem2.filename().wstring()) && is_valid_file(it->path().wstring()))\r
 538                         return it->path().wstring();\r
 539         }\r
 540         return L"";\r
 541 }\r
 542 //\r
 543 //void av_dup_frame(AVFrame* frame)\r
 544 //{\r
 545 //      AVFrame* new_frame = avcodec_alloc_frame();\r
 546 //\r
 547 //\r
 548 //      const uint8_t *src_data[4] = {0};\r
 549 //      memcpy(const_cast<uint8_t**>(&src_data[0]), frame->data, 4);\r
 550 //      const int src_linesizes[4] = {0};\r
 551 //      memcpy(const_cast<int*>(&src_linesizes[0]), frame->linesize, 4);\r
 552 //\r
 553 //      av_image_alloc(new_frame->data, new_frame->linesize, new_frame->width, new_frame->height, frame->format, 16);\r
 554 //\r
 555 //      av_image_copy(new_frame->data, new_frame->linesize, src_data, src_linesizes, frame->format, new_frame->width, new_frame->height);\r
 556 //\r
 557 //      frame =\r
 558 //}\r
 559 \r
 560 }}