git.sesse.net Git - casparcg/blob - modules/ffmpeg/producer/util/util.cpp

   1 #include "../../stdafx.h"\r
   2 \r
   3 #include "util.h"\r
   4 \r
   5 #include "flv.h"\r
   6 \r
   7 #include "../../ffmpeg_error.h"\r
   8 \r
   9 #include <tbb/concurrent_unordered_map.h>\r
  10 #include <tbb/concurrent_queue.h>\r
  11 \r
  12 #include <core/producer/frame/frame_transform.h>\r
  13 #include <core/producer/frame/frame_factory.h>\r
  14 #include <core/producer/frame_producer.h>\r
  15 #include <core/mixer/write_frame.h>\r
  16 \r
  17 #include <common/exception/exceptions.h>\r
  18 #include <common/utility/assert.h>\r
  19 #include <common/memory/memcpy.h>\r
  20 \r
  21 #include <tbb/parallel_for.h>\r
  22 \r
  23 #include <boost/filesystem.hpp>\r
  24 #include <boost/lexical_cast.hpp>\r
  25 \r
  26 #if defined(_MSC_VER)\r
  27 #pragma warning (push)\r
  28 #pragma warning (disable : 4244)\r
  29 #endif\r
  30 extern "C" \r
  31 {\r
  32         #include <libswscale/swscale.h>\r
  33         #include <libavcodec/avcodec.h>\r
  34         #include <libavformat/avformat.h>\r
  35 }\r
  36 #if defined(_MSC_VER)\r
  37 #pragma warning (pop)\r
  38 #endif\r
  39 \r
  40 namespace caspar { namespace ffmpeg {\r
  41                 \r
  42 safe_ptr<AVPacket> flush_packet()\r
  43 {\r
  44         static auto packet = create_packet();\r
  45         return packet;\r
  46 }\r
  47 \r
  48 std::shared_ptr<core::audio_buffer> flush_audio()\r
  49 {\r
  50         static std::shared_ptr<core::audio_buffer> audio(new core::audio_buffer());\r
  51         return audio;\r
  52 }\r
  53 \r
  54 std::shared_ptr<core::audio_buffer> empty_audio()\r
  55 {\r
  56         static std::shared_ptr<core::audio_buffer> audio(new core::audio_buffer());\r
  57         return audio;\r
  58 }\r
  59 \r
  60 std::shared_ptr<AVFrame>                        flush_video()\r
  61 {\r
  62         static std::shared_ptr<AVFrame> video(avcodec_alloc_frame(), av_free);\r
  63         return video;\r
  64 }\r
  65 \r
  66 std::shared_ptr<AVFrame>                        empty_video()\r
  67 {\r
  68         static std::shared_ptr<AVFrame> video(avcodec_alloc_frame(), av_free);\r
  69         return video;\r
  70 }\r
  71 \r
  72 core::field_mode::type get_mode(const AVFrame& frame)\r
  73 {\r
  74         if(!frame.interlaced_frame)\r
  75                 return core::field_mode::progressive;\r
  76 \r
  77         return frame.top_field_first ? core::field_mode::upper : core::field_mode::lower;\r
  78 }\r
  79 \r
  80 core::pixel_format::type get_pixel_format(PixelFormat pix_fmt)\r
  81 {\r
  82         switch(pix_fmt)\r
  83         {\r
  84         case CASPAR_PIX_FMT_LUMA:       return core::pixel_format::luma;\r
  85         case PIX_FMT_GRAY8:                     return core::pixel_format::gray;\r
  86         case PIX_FMT_BGRA:                      return core::pixel_format::bgra;\r
  87         case PIX_FMT_ARGB:                      return core::pixel_format::argb;\r
  88         case PIX_FMT_RGBA:                      return core::pixel_format::rgba;\r
  89         case PIX_FMT_ABGR:                      return core::pixel_format::abgr;\r
  90         case PIX_FMT_YUV444P:           return core::pixel_format::ycbcr;\r
  91         case PIX_FMT_YUV422P:           return core::pixel_format::ycbcr;\r
  92         case PIX_FMT_YUV420P:           return core::pixel_format::ycbcr;\r
  93         case PIX_FMT_YUV411P:           return core::pixel_format::ycbcr;\r
  94         case PIX_FMT_YUV410P:           return core::pixel_format::ycbcr;\r
  95         case PIX_FMT_YUVA420P:          return core::pixel_format::ycbcra;\r
  96         default:                                        return core::pixel_format::invalid;\r
  97         }\r
  98 }\r
  99 \r
 100 core::pixel_format_desc get_pixel_format_desc(PixelFormat pix_fmt, size_t width, size_t height)\r
 101 {\r
 102         // Get linesizes\r
 103         AVPicture dummy_pict;   \r
 104         avpicture_fill(&dummy_pict, nullptr, pix_fmt == CASPAR_PIX_FMT_LUMA ? PIX_FMT_GRAY8 : pix_fmt, width, height);\r
 105 \r
 106         core::pixel_format_desc desc;\r
 107         desc.pix_fmt = get_pixel_format(pix_fmt);\r
 108                 \r
 109         switch(desc.pix_fmt)\r
 110         {\r
 111         case core::pixel_format::gray:\r
 112         case core::pixel_format::luma:\r
 113                 {\r
 114                         desc.planes.push_back(core::pixel_format_desc::plane(dummy_pict.linesize[0], height, 1));                                               \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                         size_t size2 = dummy_pict.data[2] - dummy_pict.data[1];\r
 130                         size_t 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.pix_fmt == 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.pix_fmt = core::pixel_format::invalid;\r
 142                 return desc;\r
 143         }\r
 144 }\r
 145 \r
 146 int make_alpha_format(int format)\r
 147 {\r
 148         switch(get_pixel_format(static_cast<PixelFormat>(format)))\r
 149         {\r
 150         case core::pixel_format::ycbcr:\r
 151         case core::pixel_format::ycbcra:\r
 152                 return CASPAR_PIX_FMT_LUMA;\r
 153         default:\r
 154                 return format;\r
 155         }\r
 156 }\r
 157 \r
 158 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
 159 {                       \r
 160         static tbb::concurrent_unordered_map<size_t, tbb::concurrent_queue<std::shared_ptr<SwsContext>>> sws_contexts_;\r
 161         \r
 162         if(decoded_frame->width < 1 || decoded_frame->height < 1)\r
 163                 return make_safe<core::write_frame>(tag);\r
 164 \r
 165         const auto width  = decoded_frame->width;\r
 166         const auto height = decoded_frame->height;\r
 167         auto desc                 = get_pixel_format_desc(static_cast<PixelFormat>(decoded_frame->format), width, height);\r
 168         \r
 169         if(hints & core::frame_producer::ALPHA_HINT)\r
 170                 desc = get_pixel_format_desc(static_cast<PixelFormat>(make_alpha_format(decoded_frame->format)), width, height);\r
 171 \r
 172         std::shared_ptr<core::write_frame> write;\r
 173 \r
 174         if(desc.pix_fmt == core::pixel_format::invalid)\r
 175         {\r
 176                 auto pix_fmt = static_cast<PixelFormat>(decoded_frame->format);\r
 177 \r
 178                 write = frame_factory->create_frame(tag, get_pixel_format_desc(PIX_FMT_BGRA, width, height));\r
 179                 write->set_type(get_mode(*decoded_frame));\r
 180 \r
 181                 std::shared_ptr<SwsContext> sws_context;\r
 182 \r
 183                 //CASPAR_LOG(warning) << "Hardware accelerated color transform not supported.";\r
 184 \r
 185                 size_t key = width << 20 | height << 8 | pix_fmt;\r
 186                         \r
 187                 auto& pool = sws_contexts_[key];\r
 188                                                 \r
 189                 if(!pool.try_pop(sws_context))\r
 190                 {\r
 191                         double param;\r
 192                         sws_context.reset(sws_getContext(width, height, pix_fmt, width, height, PIX_FMT_BGRA, SWS_BILINEAR, nullptr, nullptr, &param), sws_freeContext);\r
 193                 }\r
 194                         \r
 195                 if(!sws_context)\r
 196                 {\r
 197                         BOOST_THROW_EXCEPTION(operation_failed() << msg_info("Could not create software scaling context.") << \r
 198                                                                         boost::errinfo_api_function("sws_getContext"));\r
 199                 }       \r
 200 \r
 201                 // Use sws_scale when provided colorspace has no hw-accel.\r
 202                 safe_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);     \r
 203                 avcodec_get_frame_defaults(av_frame.get());                     \r
 204                 avpicture_fill(reinterpret_cast<AVPicture*>(av_frame.get()), write->image_data().begin(), PIX_FMT_BGRA, width, height);\r
 205                  \r
 206                 sws_scale(sws_context.get(), decoded_frame->data, decoded_frame->linesize, 0, height, av_frame->data, av_frame->linesize);      \r
 207                 pool.push(sws_context);\r
 208 \r
 209                 write->commit();\r
 210         }\r
 211         else\r
 212         {\r
 213                 write = frame_factory->create_frame(tag, desc);\r
 214                 write->set_type(get_mode(*decoded_frame));\r
 215 \r
 216                 for(int n = 0; n < static_cast<int>(desc.planes.size()); ++n)\r
 217                 {\r
 218                         auto plane            = desc.planes[n];\r
 219                         auto result           = write->image_data(n).begin();\r
 220                         auto decoded          = decoded_frame->data[n];\r
 221                         auto decoded_linesize = decoded_frame->linesize[n];\r
 222                         \r
 223                         CASPAR_ASSERT(decoded);\r
 224                         CASPAR_ASSERT(write->image_data(n).begin());\r
 225 \r
 226                         if(decoded_linesize != static_cast<int>(plane.width))\r
 227                         {\r
 228                                 // Copy line by line since ffmpeg sometimes pads each line.\r
 229                                 tbb::parallel_for<size_t>(0, desc.planes[n].height, [&](size_t y)\r
 230                                 {\r
 231                                         fast_memcpy(result + y*plane.linesize, decoded + y*decoded_linesize, plane.linesize);\r
 232                                 });\r
 233                         }\r
 234                         else\r
 235                         {\r
 236                                 fast_memcpy(result, decoded, plane.size);\r
 237                         }\r
 238 \r
 239                         write->commit(n);\r
 240                 }\r
 241         }\r
 242         \r
 243         // Fix field-order if needed\r
 244         if(write->get_type() == core::field_mode::lower && frame_factory->get_video_format_desc().field_mode == core::field_mode::upper)\r
 245                 write->get_frame_transform().fill_translation[1] += 1.0/static_cast<double>(frame_factory->get_video_format_desc().height);\r
 246         else if(write->get_type() == core::field_mode::upper && frame_factory->get_video_format_desc().field_mode == core::field_mode::lower)\r
 247                 write->get_frame_transform().fill_translation[1] -= 1.0/static_cast<double>(frame_factory->get_video_format_desc().height);\r
 248 \r
 249         return make_safe_ptr(write);\r
 250 }\r
 251 \r
 252 bool is_sane_fps(AVRational time_base)\r
 253 {\r
 254         double fps = static_cast<double>(time_base.den) / static_cast<double>(time_base.num);\r
 255         return fps > 20.0 && fps < 65.0;\r
 256 }\r
 257 \r
 258 void fix_meta_data(AVFormatContext& context)\r
 259 {\r
 260         auto video_index = av_find_best_stream(&context, AVMEDIA_TYPE_VIDEO, -1, -1, 0, 0);\r
 261         auto audio_index = av_find_best_stream(&context, AVMEDIA_TYPE_AUDIO, -1, -1, 0, 0);\r
 262 \r
 263         if(video_index < 0)\r
 264                 return;\r
 265 \r
 266         auto& video_context = *context.streams[video_index]->codec;\r
 267         auto& video_stream  = *context.streams[video_index];\r
 268                                                 \r
 269         if(boost::filesystem2::path(context.filename).extension() == ".flv")\r
 270         {\r
 271                 try\r
 272                 {\r
 273                         auto meta = read_flv_meta_info(context.filename);\r
 274                         double fps = boost::lexical_cast<double>(meta["framerate"]);\r
 275                         video_context.time_base.num = 1000000;\r
 276                         video_context.time_base.den = static_cast<int>(fps*1000000.0);\r
 277                         video_stream.nb_frames = static_cast<int64_t>(boost::lexical_cast<double>(meta["duration"])*fps);\r
 278                 }\r
 279                 catch(...){}\r
 280         }\r
 281         else\r
 282         {\r
 283                 if(video_stream.nb_frames == 0)\r
 284                         video_stream.nb_frames = video_stream.duration;\r
 285 \r
 286                 if(!is_sane_fps(video_context.time_base))\r
 287                 {                       \r
 288                         if(video_context.time_base.num == 1)\r
 289                                 video_context.time_base.num = static_cast<int>(std::pow(10.0, static_cast<int>(std::log10(static_cast<float>(video_context.time_base.den)))-1));        \r
 290 \r
 291                         if(!is_sane_fps(video_context.time_base) && audio_index > -1)\r
 292                         {\r
 293                                 auto& audio_context = *context.streams[audio_index]->codec;\r
 294                                 auto& audio_stream  = *context.streams[audio_index];\r
 295 \r
 296                                 double duration_sec = audio_stream.duration / static_cast<double>(audio_context.sample_rate);\r
 297                                                                 \r
 298                                 video_context.time_base.num = static_cast<int>(duration_sec*100000.0);\r
 299                                 video_context.time_base.den = static_cast<int>(video_stream.nb_frames*100000);\r
 300                         }\r
 301                 }\r
 302 \r
 303                 if(audio_index > -1) // Check for invalid double frame-rate\r
 304                 {\r
 305                         auto& audio_context             = *context.streams[audio_index]->codec;\r
 306                         auto& audio_stream              = *context.streams[audio_index];\r
 307 \r
 308                         double duration_sec             = audio_stream.duration / static_cast<double>(audio_context.sample_rate);\r
 309                         double fps                              = static_cast<double>(video_context.time_base.den) / static_cast<double>(video_context.time_base.num);\r
 310 \r
 311                         double fps_nb_frames    = static_cast<double>(duration_sec*fps);\r
 312                         double stream_nb_frames = static_cast<double>(video_stream.nb_frames);\r
 313                         double diff                             = std::abs(fps_nb_frames - stream_nb_frames*2.0);\r
 314                         if(diff < fps_nb_frames*0.05)\r
 315                                 video_context.time_base.num *= 2;\r
 316                 }\r
 317                 else\r
 318                 {\r
 319                         video_context.time_base.den = video_stream.r_frame_rate.num;\r
 320                         video_context.time_base.num = video_stream.r_frame_rate.den;\r
 321                 }\r
 322         }\r
 323 \r
 324         double fps = static_cast<double>(video_context.time_base.den) / static_cast<double>(video_context.time_base.num);\r
 325 \r
 326         double closest_fps = 0.0;\r
 327         for(int n = 0; n < core::video_format::count; ++n)\r
 328         {\r
 329                 auto format = core::video_format_desc::get(static_cast<core::video_format::type>(n));\r
 330 \r
 331                 double diff1 = std::abs(format.fps - fps);\r
 332                 double diff2 = std::abs(closest_fps - fps);\r
 333 \r
 334                 if(diff1 < diff2)\r
 335                         closest_fps = format.fps;\r
 336         }\r
 337         \r
 338         video_context.time_base.num = 1000000;\r
 339         video_context.time_base.den = static_cast<int>(closest_fps*1000000.0);\r
 340 }\r
 341 \r
 342 safe_ptr<AVPacket> create_packet()\r
 343 {\r
 344         safe_ptr<AVPacket> packet(new AVPacket, [](AVPacket* p)\r
 345         {\r
 346                 av_free_packet(p);\r
 347                 delete p;\r
 348         });\r
 349         \r
 350         av_init_packet(packet.get());\r
 351         return packet;\r
 352 }\r
 353 \r
 354 safe_ptr<AVCodecContext> open_codec(AVFormatContext& context, enum AVMediaType type, int& index)\r
 355 {       \r
 356         AVCodec* decoder;\r
 357         index = THROW_ON_ERROR2(av_find_best_stream(&context, type, -1, -1, &decoder, 0), "");\r
 358         THROW_ON_ERROR2(avcodec_open(context.streams[index]->codec, decoder), "");\r
 359         return safe_ptr<AVCodecContext>(context.streams[index]->codec, avcodec_close);\r
 360 }\r
 361 \r
 362 safe_ptr<AVFormatContext> open_input(const std::wstring& filename)\r
 363 {\r
 364         AVFormatContext* weak_context = nullptr;\r
 365         THROW_ON_ERROR2(avformat_open_input(&weak_context, narrow(filename).c_str(), nullptr, nullptr), filename);\r
 366         safe_ptr<AVFormatContext> context(weak_context, av_close_input_file);                   \r
 367         THROW_ON_ERROR2(avformat_find_stream_info(weak_context, nullptr), filename);\r
 368         fix_meta_data(*context);\r
 369         return context;\r
 370 }\r
 371 //\r
 372 //void av_dup_frame(AVFrame* frame)\r
 373 //{\r
 374 //      AVFrame* new_frame = avcodec_alloc_frame();\r
 375 //\r
 376 //\r
 377 //      const uint8_t *src_data[4] = {0};\r
 378 //      memcpy(const_cast<uint8_t**>(&src_data[0]), frame->data, 4);\r
 379 //      const int src_linesizes[4] = {0};\r
 380 //      memcpy(const_cast<int*>(&src_linesizes[0]), frame->linesize, 4);\r
 381 //\r
 382 //      av_image_alloc(new_frame->data, new_frame->linesize, new_frame->width, new_frame->height, frame->format, 16);\r
 383 //\r
 384 //      av_image_copy(new_frame->data, new_frame->linesize, src_data, src_linesizes, frame->format, new_frame->width, new_frame->height);\r
 385 //\r
 386 //      frame =\r
 387 //}\r
 388 \r
 389 }}