git.sesse.net Git - casparcg/blob - modules/ffmpeg/consumer/streaming_consumer.cpp

   1 #include "../StdAfx.h"
   2
   3 #include "ffmpeg_consumer.h"
   4
   5 #include "../ffmpeg_error.h"
   6 #include "../producer/util/util.h"
   7
   8 #include <common/except.h>
   9 #include <common/executor.h>
  10 #include <common/assert.h>
  11 #include <common/utf.h>
  12 #include <common/future.h>
  13 #include <common/env.h>
  14 #include <common/scope_exit.h>
  15 #include <common/ptree.h>
  16
  17 #include <core/consumer/frame_consumer.h>
  18 #include <core/frame/frame.h>
  19 #include <core/frame/audio_channel_layout.h>
  20 #include <core/video_format.h>
  21 #include <core/monitor/monitor.h>
  22 #include <core/help/help_repository.h>
  23 #include <core/help/help_sink.h>
  24
  25 #include <boost/noncopyable.hpp>
  26 #include <boost/rational.hpp>
  27 #include <boost/format.hpp>
  28 #include <boost/algorithm/string/predicate.hpp>
  29 #include <boost/property_tree/ptree.hpp>
  30
  31 #pragma warning(push)
  32 #pragma warning(disable: 4244)
  33 #pragma warning(disable: 4245)
  34 #include <boost/crc.hpp>
  35 #pragma warning(pop)
  36
  37 #include <tbb/atomic.h>
  38 #include <tbb/concurrent_queue.h>
  39 #include <tbb/parallel_invoke.h>
  40 #include <tbb/parallel_for.h>
  41
  42 #include <numeric>
  43
  44 #pragma warning(push)
  45 #pragma warning(disable: 4244)
  46
  47 extern "C"
  48 {
  49         #define __STDC_CONSTANT_MACROS
  50         #define __STDC_LIMIT_MACROS
  51         #include <libavformat/avformat.h>
  52         #include <libavcodec/avcodec.h>
  53         #include <libavutil/avutil.h>
  54         #include <libavutil/frame.h>
  55         #include <libavutil/opt.h>
  56         #include <libavutil/imgutils.h>
  57         #include <libavutil/parseutils.h>
  58         #include <libavfilter/avfilter.h>
  59         #include <libavfilter/buffersink.h>
  60         #include <libavfilter/buffersrc.h>
  61 }
  62
  63 #pragma warning(pop)
  64
  65 namespace caspar { namespace ffmpeg {
  66
  67 int crc16(const std::string& str)
  68 {
  69         boost::crc_16_type result;
  70
  71         result.process_bytes(str.data(), str.length());
  72
  73         return result.checksum();
  74 }
  75
  76 class streaming_consumer final : public core::frame_consumer
  77 {
  78 public:
  79         // Static Members
  80
  81 private:
  82         core::monitor::subject                                          subject_;
  83         boost::filesystem::path                                         path_;
  84         int                                                                                     consumer_index_offset_;
  85
  86         std::map<std::string, std::string>                      options_;
  87         bool                                                                            compatibility_mode_;
  88
  89         core::video_format_desc                                         in_video_format_;
  90         core::audio_channel_layout                                      in_channel_layout_                      = core::audio_channel_layout::invalid();
  91
  92         std::shared_ptr<AVFormatContext>                        oc_;
  93         tbb::atomic<bool>                                                       abort_request_;
  94
  95         std::shared_ptr<AVStream>                                       video_st_;
  96         std::shared_ptr<AVStream>                                       audio_st_;
  97
  98         std::int64_t                                                            video_pts_;
  99         std::int64_t                                                            audio_pts_;
 100
 101     AVFilterContext*                                                    audio_graph_in_;
 102     AVFilterContext*                                                    audio_graph_out_;
 103     std::shared_ptr<AVFilterGraph>                              audio_graph_;
 104
 105     AVFilterContext*                                                    video_graph_in_;
 106     AVFilterContext*                                                    video_graph_out_;
 107     std::shared_ptr<AVFilterGraph>                              video_graph_;
 108
 109         executor                                                                        executor_;
 110
 111         executor                                                                        video_encoder_executor_;
 112         executor                                                                        audio_encoder_executor_;
 113
 114         tbb::atomic<int>                                                        tokens_;
 115         boost::mutex                                                            tokens_mutex_;
 116         boost::condition_variable                                       tokens_cond_;
 117         tbb::atomic<int64_t>                                            current_encoding_delay_;
 118
 119         executor                                                                        write_executor_;
 120
 121 public:
 122
 123         streaming_consumer(
 124                         std::string path,
 125                         std::string options,
 126                         bool compatibility_mode)
 127                 : path_(path)
 128                 , consumer_index_offset_(crc16(path))
 129                 , compatibility_mode_(compatibility_mode)
 130                 , video_pts_(0)
 131                 , audio_pts_(0)
 132                 , executor_(print())
 133                 , audio_encoder_executor_(print() + L" audio_encoder")
 134                 , video_encoder_executor_(print() + L" video_encoder")
 135                 , write_executor_(print() + L" io")
 136         {
 137                 abort_request_ = false;
 138                 current_encoding_delay_ = 0;
 139
 140                 for(auto it =
 141                                 boost::sregex_iterator(
 142                                         options.begin(),
 143                                         options.end(),
 144                                         boost::regex("-(?<NAME>[^-\\s]+)(\\s+(?<VALUE>[^\\s]+))?"));
 145                         it != boost::sregex_iterator();
 146                         ++it)
 147                 {
 148                         options_[(*it)["NAME"].str()] = (*it)["VALUE"].matched ? (*it)["VALUE"].str() : "";
 149                 }
 150
 151         if (options_.find("threads") == options_.end())
 152             options_["threads"] = "auto";
 153
 154                 tokens_ =
 155                         std::max(
 156                                 1,
 157                                 try_remove_arg<int>(
 158                                         options_,
 159                                         boost::regex("tokens")).get_value_or(2));
 160         }
 161
 162         ~streaming_consumer()
 163         {
 164                 if(oc_)
 165                 {
 166                         video_encoder_executor_.begin_invoke([&] { encode_video(core::const_frame::empty(), nullptr); });
 167                         audio_encoder_executor_.begin_invoke([&] { encode_audio(core::const_frame::empty(), nullptr); });
 168
 169                         video_encoder_executor_.stop();
 170                         audio_encoder_executor_.stop();
 171                         video_encoder_executor_.join();
 172                         audio_encoder_executor_.join();
 173
 174                         video_graph_.reset();
 175                         audio_graph_.reset();
 176                         video_st_.reset();
 177                         audio_st_.reset();
 178
 179                         write_packet(nullptr, nullptr);
 180
 181                         write_executor_.stop();
 182                         write_executor_.join();
 183
 184                         FF(av_write_trailer(oc_.get()));
 185
 186                         if (!(oc_->oformat->flags & AVFMT_NOFILE) && oc_->pb)
 187                                 avio_close(oc_->pb);
 188
 189                         oc_.reset();
 190                 }
 191         }
 192
 193         void initialize(
 194                         const core::video_format_desc& format_desc,
 195                         const core::audio_channel_layout& channel_layout,
 196                         int channel_index) override
 197         {
 198                 try
 199                 {
 200                         static boost::regex prot_exp("^.+:.*" );
 201
 202                         const auto overwrite =
 203                                 try_remove_arg<std::string>(
 204                                         options_,
 205                                         boost::regex("y")) != boost::none;
 206
 207                         if(!boost::regex_match(
 208                                         path_.string(),
 209                                         prot_exp))
 210                         {
 211                                 if(!path_.is_complete())
 212                                 {
 213                                         path_ =
 214                                                 u8(
 215                                                         env::media_folder()) +
 216                                                         path_.string();
 217                                 }
 218
 219                                 if(boost::filesystem::exists(path_))
 220                                 {
 221                                         if(!overwrite && !compatibility_mode_)
 222                                                 BOOST_THROW_EXCEPTION(invalid_argument() << msg_info("File exists"));
 223
 224                                         boost::filesystem::remove(path_);
 225                                 }
 226                         }
 227
 228                         const auto oformat_name =
 229                                 try_remove_arg<std::string>(
 230                                         options_,
 231                                         boost::regex("^f|format$"));
 232
 233                         AVFormatContext* oc;
 234
 235                         FF(avformat_alloc_output_context2(
 236                                 &oc,
 237                                 nullptr,
 238                                 oformat_name && !oformat_name->empty() ? oformat_name->c_str() : nullptr,
 239                                 path_.string().c_str()));
 240
 241                         oc_.reset(
 242                                 oc,
 243                                 avformat_free_context);
 244
 245                         CASPAR_VERIFY(oc_->oformat);
 246
 247                         oc_->interrupt_callback.callback = streaming_consumer::interrupt_cb;
 248                         oc_->interrupt_callback.opaque   = this;
 249
 250                         CASPAR_VERIFY(format_desc.format != core::video_format::invalid);
 251
 252                         in_video_format_ = format_desc;
 253                         in_channel_layout_ = channel_layout;
 254
 255                         CASPAR_VERIFY(oc_->oformat);
 256
 257                         const auto video_codec_name =
 258                                 try_remove_arg<std::string>(
 259                                         options_,
 260                                         boost::regex("^c:v|codec:v|vcodec$"));
 261
 262                         const auto video_codec =
 263                                 video_codec_name
 264                                         ? avcodec_find_encoder_by_name(video_codec_name->c_str())
 265                                         : avcodec_find_encoder(oc_->oformat->video_codec);
 266
 267                         const auto audio_codec_name =
 268                                 try_remove_arg<std::string>(
 269                                         options_,
 270                                          boost::regex("^c:a|codec:a|acodec$"));
 271
 272                         const auto audio_codec =
 273                                 audio_codec_name
 274                                         ? avcodec_find_encoder_by_name(audio_codec_name->c_str())
 275                                         : avcodec_find_encoder(oc_->oformat->audio_codec);
 276
 277                         if (!video_codec)
 278                                 CASPAR_THROW_EXCEPTION(user_error() << msg_info(
 279                                                 "Failed to find video codec " + (video_codec_name
 280                                                                 ? *video_codec_name
 281                                                                 : "with id " + boost::lexical_cast<std::string>(
 282                                                                                 oc_->oformat->video_codec))));
 283                         if (!audio_codec)
 284                                 CASPAR_THROW_EXCEPTION(user_error() << msg_info(
 285                                                 "Failed to find audio codec " + (audio_codec_name
 286                                                                 ? *audio_codec_name
 287                                                                 : "with id " + boost::lexical_cast<std::string>(
 288                                                                                 oc_->oformat->audio_codec))));
 289
 290                         // Filters
 291
 292                         {
 293                                 configure_video_filters(
 294                                         *video_codec,
 295                                         try_remove_arg<std::string>(options_,
 296                                         boost::regex("vf|f:v|filter:v")).get_value_or(""));
 297
 298                                 configure_audio_filters(
 299                                         *audio_codec,
 300                                         try_remove_arg<std::string>(options_,
 301                                         boost::regex("af|f:a|filter:a")).get_value_or(""));
 302                         }
 303
 304                         // Encoders
 305
 306                         {
 307                                 auto video_options = options_;
 308                                 auto audio_options = options_;
 309
 310                                 video_st_ = open_encoder(
 311                                         *video_codec,
 312                                         video_options);
 313
 314                                 audio_st_ = open_encoder(
 315                                         *audio_codec,
 316                                         audio_options);
 317
 318                                 auto it = options_.begin();
 319                                 while(it != options_.end())
 320                                 {
 321                                         if(video_options.find(it->first) == video_options.end() || audio_options.find(it->first) == audio_options.end())
 322                                                 it = options_.erase(it);
 323                                         else
 324                                                 ++it;
 325                                 }
 326                         }
 327
 328                         // Output
 329                         {
 330                                 AVDictionary* av_opts = nullptr;
 331
 332                                 to_dict(
 333                                         &av_opts,
 334                                         std::move(options_));
 335
 336                                 CASPAR_SCOPE_EXIT
 337                                 {
 338                                         av_dict_free(&av_opts);
 339                                 };
 340
 341                                 if (!(oc_->oformat->flags & AVFMT_NOFILE))
 342                                 {
 343                                         FF(avio_open2(
 344                                                 &oc_->pb,
 345                                                 path_.string().c_str(),
 346                                                 AVIO_FLAG_WRITE,
 347                                                 &oc_->interrupt_callback,
 348                                                 &av_opts));
 349                                 }
 350
 351                                 FF(avformat_write_header(
 352                                         oc_.get(),
 353                                         &av_opts));
 354
 355                                 options_ = to_map(av_opts);
 356                         }
 357
 358                         // Dump Info
 359
 360                         av_dump_format(
 361                                 oc_.get(),
 362                                 0,
 363                                 oc_->filename,
 364                                 1);
 365
 366                         for (const auto& option : options_)
 367                         {
 368                                 CASPAR_LOG(warning)
 369                                         << L"Invalid option: -"
 370                                         << u16(option.first)
 371                                         << L" "
 372                                         << u16(option.second);
 373                         }
 374                 }
 375                 catch(...)
 376                 {
 377                         video_st_.reset();
 378                         audio_st_.reset();
 379                         oc_.reset();
 380                         throw;
 381                 }
 382         }
 383
 384         core::monitor::subject& monitor_output() override
 385         {
 386                 return subject_;
 387         }
 388
 389         std::wstring name() const override
 390         {
 391                 return L"streaming";
 392         }
 393
 394         std::future<bool> send(core::const_frame frame) override
 395         {
 396                 CASPAR_VERIFY(in_video_format_.format != core::video_format::invalid);
 397
 398                 --tokens_;
 399                 std::shared_ptr<void> token(
 400                         nullptr,
 401                         [this, frame](void*)
 402                         {
 403                                 ++tokens_;
 404                                 tokens_cond_.notify_one();
 405                                 current_encoding_delay_ = frame.get_age_millis();
 406                         });
 407
 408                 return executor_.begin_invoke([=]() -> bool
 409                 {
 410                         boost::unique_lock<boost::mutex> tokens_lock(tokens_mutex_);
 411
 412                         while(tokens_ < 0)
 413                                 tokens_cond_.wait(tokens_lock);
 414
 415                         video_encoder_executor_.begin_invoke([=]() mutable
 416                         {
 417                                 encode_video(
 418                                         frame,
 419                                         token);
 420                         });
 421
 422                         audio_encoder_executor_.begin_invoke([=]() mutable
 423                         {
 424                                 encode_audio(
 425                                         frame,
 426                                         token);
 427                         });
 428
 429                         return true;
 430                 });
 431         }
 432
 433         std::wstring print() const override
 434         {
 435                 return L"streaming_consumer[" + u16(path_.string()) + L"]";
 436         }
 437
 438         virtual boost::property_tree::wptree info() const override
 439         {
 440                 boost::property_tree::wptree info;
 441                 info.add(L"type", L"stream");
 442                 info.add(L"path", path_.wstring());
 443                 return info;
 444         }
 445
 446         bool has_synchronization_clock() const override
 447         {
 448                 return false;
 449         }
 450
 451         int buffer_depth() const override
 452         {
 453                 return -1;
 454         }
 455
 456         int index() const override
 457         {
 458                 return compatibility_mode_ ? 200 : 100000 + consumer_index_offset_;
 459         }
 460
 461         int64_t presentation_frame_age_millis() const override
 462         {
 463                 return current_encoding_delay_;
 464         }
 465
 466 private:
 467
 468         static int interrupt_cb(void* ctx)
 469         {
 470                 CASPAR_ASSERT(ctx);
 471                 return reinterpret_cast<streaming_consumer*>(ctx)->abort_request_;
 472         }
 473
 474         std::shared_ptr<AVStream> open_encoder(
 475                         const AVCodec& codec,
 476                         std::map<std::string,
 477                         std::string>& options)
 478         {
 479                 auto st =
 480                         avformat_new_stream(
 481                                 oc_.get(),
 482                                 &codec);
 483
 484                 if (!st)
 485                         CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Could not allocate video-stream.") << boost::errinfo_api_function("av_new_stream"));
 486
 487                 auto enc = st->codec;
 488
 489                 CASPAR_VERIFY(enc);
 490
 491                 switch(enc->codec_type)
 492                 {
 493                         case AVMEDIA_TYPE_VIDEO:
 494                         {
 495                                 enc->time_base                          = video_graph_out_->inputs[0]->time_base;
 496                                 enc->pix_fmt                            = static_cast<AVPixelFormat>(video_graph_out_->inputs[0]->format);
 497                                 enc->sample_aspect_ratio        = st->sample_aspect_ratio = video_graph_out_->inputs[0]->sample_aspect_ratio;
 498                                 enc->width                                      = video_graph_out_->inputs[0]->w;
 499                                 enc->height                                     = video_graph_out_->inputs[0]->h;
 500                                 enc->bit_rate_tolerance         = 400 * 1000000;
 501
 502                                 break;
 503                         }
 504                         case AVMEDIA_TYPE_AUDIO:
 505                         {
 506                                 enc->time_base                          = audio_graph_out_->inputs[0]->time_base;
 507                                 enc->sample_fmt                         = static_cast<AVSampleFormat>(audio_graph_out_->inputs[0]->format);
 508                                 enc->sample_rate                        = audio_graph_out_->inputs[0]->sample_rate;
 509                                 enc->channel_layout                     = audio_graph_out_->inputs[0]->channel_layout;
 510                                 enc->channels                           = audio_graph_out_->inputs[0]->channels;
 511
 512                                 break;
 513                         }
 514                 }
 515
 516                 if(oc_->oformat->flags & AVFMT_GLOBALHEADER)
 517                         enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
 518
 519                 static const std::array<std::string, 4> char_id_map = {{"v", "a", "d", "s"}};
 520
 521                 const auto char_id = char_id_map.at(enc->codec_type);
 522
 523                 const auto codec_opts =
 524                         remove_options(
 525                                 options,
 526                                 boost::regex("^(" + char_id + "?[^:]+):" + char_id + "$"));
 527
 528                 AVDictionary* av_codec_opts = nullptr;
 529
 530                 to_dict(
 531                         &av_codec_opts,
 532                         options);
 533
 534                 to_dict(
 535                         &av_codec_opts,
 536                         codec_opts);
 537
 538                 options.clear();
 539
 540                 FF(avcodec_open2(
 541                         enc,
 542                         &codec,
 543                         av_codec_opts ? &av_codec_opts : nullptr));
 544
 545                 if(av_codec_opts)
 546                 {
 547                         auto t =
 548                                 av_dict_get(
 549                                         av_codec_opts,
 550                                         "",
 551                                          nullptr,
 552                                         AV_DICT_IGNORE_SUFFIX);
 553
 554                         while(t)
 555                         {
 556                                 options[t->key + (codec_opts.find(t->key) != codec_opts.end() ? ":" + char_id : "")] = t->value;
 557
 558                                 t = av_dict_get(
 559                                                 av_codec_opts,
 560                                                 "",
 561                                                 t,
 562                                                 AV_DICT_IGNORE_SUFFIX);
 563                         }
 564
 565                         av_dict_free(&av_codec_opts);
 566                 }
 567
 568                 if(enc->codec_type == AVMEDIA_TYPE_AUDIO && !(codec.capabilities & CODEC_CAP_VARIABLE_FRAME_SIZE))
 569                 {
 570                         CASPAR_ASSERT(enc->frame_size > 0);
 571                         av_buffersink_set_frame_size(audio_graph_out_,
 572                                                                                  enc->frame_size);
 573                 }
 574
 575                 return std::shared_ptr<AVStream>(st, [this](AVStream* st)
 576                 {
 577                         avcodec_close(st->codec);
 578                 });
 579         }
 580
 581         void configure_video_filters(
 582                         const AVCodec& codec,
 583                         const std::string& filtergraph)
 584         {
 585                 video_graph_.reset(
 586                                 avfilter_graph_alloc(),
 587                                 [](AVFilterGraph* p)
 588                                 {
 589                                         avfilter_graph_free(&p);
 590                                 });
 591
 592                 video_graph_->nb_threads  = boost::thread::hardware_concurrency()/2;
 593                 video_graph_->thread_type = AVFILTER_THREAD_SLICE;
 594
 595                 const auto sample_aspect_ratio =
 596                         boost::rational<int>(
 597                                         in_video_format_.square_width,
 598                                         in_video_format_.square_height) /
 599                         boost::rational<int>(
 600                                         in_video_format_.width,
 601                                         in_video_format_.height);
 602
 603                 const auto vsrc_options = (boost::format("video_size=%1%x%2%:pix_fmt=%3%:time_base=%4%/%5%:pixel_aspect=%6%/%7%:frame_rate=%8%/%9%")
 604                         % in_video_format_.width % in_video_format_.height
 605                         % AV_PIX_FMT_BGRA
 606                         % in_video_format_.duration     % in_video_format_.time_scale
 607                         % sample_aspect_ratio.numerator() % sample_aspect_ratio.denominator()
 608                         % in_video_format_.time_scale % in_video_format_.duration).str();
 609
 610                 AVFilterContext* filt_vsrc = nullptr;
 611                 FF(avfilter_graph_create_filter(
 612                                 &filt_vsrc,
 613                                 avfilter_get_by_name("buffer"),
 614                                 "ffmpeg_consumer_buffer",
 615                                 vsrc_options.c_str(),
 616                                 nullptr,
 617                                 video_graph_.get()));
 618
 619                 AVFilterContext* filt_vsink = nullptr;
 620                 FF(avfilter_graph_create_filter(
 621                                 &filt_vsink,
 622                                 avfilter_get_by_name("buffersink"),
 623                                 "ffmpeg_consumer_buffersink",
 624                                 nullptr,
 625                                 nullptr,
 626                                 video_graph_.get()));
 627
 628 #pragma warning (push)
 629 #pragma warning (disable : 4245)
 630
 631                 FF(av_opt_set_int_list(
 632                                 filt_vsink,
 633                                 "pix_fmts",
 634                                 codec.pix_fmts,
 635                                 -1,
 636                                 AV_OPT_SEARCH_CHILDREN));
 637
 638 #pragma warning (pop)
 639
 640                 configure_filtergraph(
 641                                 *video_graph_,
 642                                 filtergraph,
 643                                 *filt_vsrc,
 644                                 *filt_vsink);
 645
 646                 video_graph_in_  = filt_vsrc;
 647                 video_graph_out_ = filt_vsink;
 648
 649                 CASPAR_LOG(info)
 650                         <<      u16(std::string("\n")
 651                                 + avfilter_graph_dump(
 652                                                 video_graph_.get(),
 653                                                 nullptr));
 654         }
 655
 656         void configure_audio_filters(
 657                         const AVCodec& codec,
 658                         const std::string& filtergraph)
 659         {
 660                 audio_graph_.reset(
 661                         avfilter_graph_alloc(),
 662                         [](AVFilterGraph* p)
 663                         {
 664                                 avfilter_graph_free(&p);
 665                         });
 666
 667                 audio_graph_->nb_threads  = boost::thread::hardware_concurrency()/2;
 668                 audio_graph_->thread_type = AVFILTER_THREAD_SLICE;
 669
 670                 const auto asrc_options = (boost::format("sample_rate=%1%:sample_fmt=%2%:channels=%3%:time_base=%4%/%5%:channel_layout=%6%")
 671                         % in_video_format_.audio_sample_rate
 672                         % av_get_sample_fmt_name(AV_SAMPLE_FMT_S32)
 673                         % in_channel_layout_.num_channels
 674                         % 1     % in_video_format_.audio_sample_rate
 675                         % boost::io::group(
 676                                 std::hex,
 677                                 std::showbase,
 678                                 av_get_default_channel_layout(in_channel_layout_.num_channels))).str();
 679
 680                 AVFilterContext* filt_asrc = nullptr;
 681                 FF(avfilter_graph_create_filter(
 682                         &filt_asrc,
 683                         avfilter_get_by_name("abuffer"),
 684                         "ffmpeg_consumer_abuffer",
 685                         asrc_options.c_str(),
 686                         nullptr,
 687                         audio_graph_.get()));
 688
 689                 AVFilterContext* filt_asink = nullptr;
 690                 FF(avfilter_graph_create_filter(
 691                         &filt_asink,
 692                         avfilter_get_by_name("abuffersink"),
 693                         "ffmpeg_consumer_abuffersink",
 694                         nullptr,
 695                         nullptr,
 696                         audio_graph_.get()));
 697
 698 #pragma warning (push)
 699 #pragma warning (disable : 4245)
 700
 701                 FF(av_opt_set_int(
 702                         filt_asink,
 703                         "all_channel_counts",
 704                         1,
 705                         AV_OPT_SEARCH_CHILDREN));
 706
 707                 FF(av_opt_set_int_list(
 708                         filt_asink,
 709                         "sample_fmts",
 710                         codec.sample_fmts,
 711                         -1,
 712                         AV_OPT_SEARCH_CHILDREN));
 713
 714                 FF(av_opt_set_int_list(
 715                         filt_asink,
 716                         "channel_layouts",
 717                         codec.channel_layouts,
 718                         -1,
 719                         AV_OPT_SEARCH_CHILDREN));
 720
 721                 FF(av_opt_set_int_list(
 722                         filt_asink,
 723                         "sample_rates" ,
 724                         codec.supported_samplerates,
 725                         -1,
 726                         AV_OPT_SEARCH_CHILDREN));
 727
 728 #pragma warning (pop)
 729
 730                 configure_filtergraph(
 731                         *audio_graph_,
 732                         filtergraph,
 733                         *filt_asrc,
 734                         *filt_asink);
 735
 736                 audio_graph_in_  = filt_asrc;
 737                 audio_graph_out_ = filt_asink;
 738
 739                 CASPAR_LOG(info)
 740                         <<      u16(std::string("\n")
 741                                 + avfilter_graph_dump(
 742                                         audio_graph_.get(),
 743                                         nullptr));
 744         }
 745
 746         void configure_filtergraph(
 747                         AVFilterGraph& graph,
 748                         const std::string& filtergraph,
 749                         AVFilterContext& source_ctx,
 750                         AVFilterContext& sink_ctx)
 751         {
 752                 AVFilterInOut* outputs = nullptr;
 753                 AVFilterInOut* inputs = nullptr;
 754
 755                 try
 756                 {
 757                         if(!filtergraph.empty())
 758                         {
 759                                 outputs = avfilter_inout_alloc();
 760                                 inputs  = avfilter_inout_alloc();
 761
 762                                 CASPAR_VERIFY(outputs && inputs);
 763
 764                                 outputs->name       = av_strdup("in");
 765                                 outputs->filter_ctx = &source_ctx;
 766                                 outputs->pad_idx    = 0;
 767                                 outputs->next       = nullptr;
 768
 769                                 inputs->name        = av_strdup("out");
 770                                 inputs->filter_ctx  = &sink_ctx;
 771                                 inputs->pad_idx     = 0;
 772                                 inputs->next        = nullptr;
 773
 774                                 FF(avfilter_graph_parse(
 775                                         &graph,
 776                                         filtergraph.c_str(),
 777                                         inputs,
 778                                         outputs,
 779                                         nullptr));
 780                         }
 781                         else
 782                         {
 783                                 FF(avfilter_link(
 784                                         &source_ctx,
 785                                         0,
 786                                         &sink_ctx,
 787                                         0));
 788                         }
 789
 790                         FF(avfilter_graph_config(
 791                                 &graph,
 792                                 nullptr));
 793                 }
 794                 catch(...)
 795                 {
 796                         avfilter_inout_free(&outputs);
 797                         avfilter_inout_free(&inputs);
 798                         throw;
 799                 }
 800         }
 801
 802         void encode_video(core::const_frame frame_ptr, std::shared_ptr<void> token)
 803         {
 804                 if(!video_st_)
 805                         return;
 806
 807                 auto enc = video_st_->codec;
 808
 809                 if(frame_ptr != core::const_frame::empty())
 810                 {
 811                         auto src_av_frame = create_frame();
 812
 813                         const auto sample_aspect_ratio =
 814                                 boost::rational<int>(
 815                                         in_video_format_.square_width,
 816                                         in_video_format_.square_height) /
 817                                 boost::rational<int>(
 818                                         in_video_format_.width,
 819                                         in_video_format_.height);
 820
 821                         src_av_frame->format                              = AV_PIX_FMT_BGRA;
 822                         src_av_frame->width                                       = in_video_format_.width;
 823                         src_av_frame->height                              = in_video_format_.height;
 824                         src_av_frame->sample_aspect_ratio.num = sample_aspect_ratio.numerator();
 825                         src_av_frame->sample_aspect_ratio.den = sample_aspect_ratio.denominator();
 826                         src_av_frame->pts                                         = video_pts_;
 827
 828                         video_pts_ += 1;
 829
 830                         FF(av_image_fill_arrays(
 831                                 src_av_frame->data,
 832                                 src_av_frame->linesize,
 833                                 frame_ptr.image_data().begin(),
 834                                 static_cast<AVPixelFormat>(src_av_frame->format),
 835                                 in_video_format_.width,
 836                                 in_video_format_.height,
 837                                 1));
 838
 839                         FF(av_buffersrc_add_frame(
 840                                 video_graph_in_,
 841                                 src_av_frame.get()));
 842                 }
 843
 844                 int ret = 0;
 845
 846                 while(ret >= 0)
 847                 {
 848                         auto filt_frame = create_frame();
 849
 850                         ret = av_buffersink_get_frame(
 851                                 video_graph_out_,
 852                                 filt_frame.get());
 853
 854                         video_encoder_executor_.begin_invoke([=]
 855                         {
 856                                 if(ret == AVERROR_EOF)
 857                                 {
 858                                         if(enc->codec->capabilities & CODEC_CAP_DELAY)
 859                                         {
 860                                                 while(encode_av_frame(
 861                                                                 *video_st_,
 862                                                                 avcodec_encode_video2,
 863                                                                 nullptr, token))
 864                                                 {
 865                                                         boost::this_thread::yield(); // TODO:
 866                                                 }
 867                                         }
 868                                 }
 869                                 else if(ret != AVERROR(EAGAIN))
 870                                 {
 871                                         FF_RET(ret, "av_buffersink_get_frame");
 872
 873                                         if (filt_frame->interlaced_frame)
 874                                         {
 875                                                 if (enc->codec->id == AV_CODEC_ID_MJPEG)
 876                                                         enc->field_order = filt_frame->top_field_first ? AV_FIELD_TT : AV_FIELD_BB;
 877                                                 else
 878                                                         enc->field_order = filt_frame->top_field_first ? AV_FIELD_TB : AV_FIELD_BT;
 879                                         }
 880                                         else
 881                                                 enc->field_order = AV_FIELD_PROGRESSIVE;
 882
 883                                         filt_frame->quality = enc->global_quality;
 884
 885                                         if (!enc->me_threshold)
 886                                                 filt_frame->pict_type = AV_PICTURE_TYPE_NONE;
 887
 888                                         encode_av_frame(
 889                                                 *video_st_,
 890                                                 avcodec_encode_video2,
 891                                                 filt_frame,
 892                                                 token);
 893
 894                                         boost::this_thread::yield(); // TODO:
 895                                 }
 896                         });
 897                 }
 898         }
 899
 900         void encode_audio(core::const_frame frame_ptr, std::shared_ptr<void> token)
 901         {
 902                 if(!audio_st_)
 903                         return;
 904
 905                 auto enc = audio_st_->codec;
 906
 907                 if(frame_ptr != core::const_frame::empty())
 908                 {
 909                         auto src_av_frame = create_frame();
 910
 911                         src_av_frame->channels           = in_channel_layout_.num_channels;
 912                         src_av_frame->channel_layout = av_get_default_channel_layout(in_channel_layout_.num_channels);
 913                         src_av_frame->sample_rate        = in_video_format_.audio_sample_rate;
 914                         src_av_frame->nb_samples         = static_cast<int>(frame_ptr.audio_data().size()) / src_av_frame->channels;
 915                         src_av_frame->format             = AV_SAMPLE_FMT_S32;
 916                         src_av_frame->pts                        = audio_pts_;
 917
 918                         audio_pts_ += src_av_frame->nb_samples;
 919
 920                         FF(av_samples_fill_arrays(
 921                                         src_av_frame->extended_data,
 922                                         src_av_frame->linesize,
 923                                         reinterpret_cast<const std::uint8_t*>(&*frame_ptr.audio_data().begin()),
 924                                         src_av_frame->channels,
 925                                         src_av_frame->nb_samples,
 926                                         static_cast<AVSampleFormat>(src_av_frame->format),
 927                                         16));
 928
 929                         FF(av_buffersrc_add_frame(
 930                                         audio_graph_in_,
 931                                         src_av_frame.get()));
 932                 }
 933
 934                 int ret = 0;
 935
 936                 while(ret >= 0)
 937                 {
 938                         auto filt_frame = create_frame();
 939
 940                         ret = av_buffersink_get_frame(
 941                                 audio_graph_out_,
 942                                 filt_frame.get());
 943
 944                         audio_encoder_executor_.begin_invoke([=]
 945                         {
 946                                 if(ret == AVERROR_EOF)
 947                                 {
 948                                         if(enc->codec->capabilities & CODEC_CAP_DELAY)
 949                                         {
 950                                                 while(encode_av_frame(
 951                                                                 *audio_st_,
 952                                                                 avcodec_encode_audio2,
 953                                                                 nullptr,
 954                                                                 token))
 955                                                 {
 956                                                         boost::this_thread::yield(); // TODO:
 957                                                 }
 958                                         }
 959                                 }
 960                                 else if(ret != AVERROR(EAGAIN))
 961                                 {
 962                                         FF_RET(
 963                                                 ret,
 964                                                 "av_buffersink_get_frame");
 965
 966                                         encode_av_frame(
 967                                                 *audio_st_,
 968                                                 avcodec_encode_audio2,
 969                                                 filt_frame,
 970                                                 token);
 971
 972                                         boost::this_thread::yield(); // TODO:
 973                                 }
 974                         });
 975                 }
 976         }
 977
 978         template<typename F>
 979         bool encode_av_frame(
 980                         AVStream& st,
 981                         const F& func,
 982                         const std::shared_ptr<AVFrame>& src_av_frame,
 983                         std::shared_ptr<void> token)
 984         {
 985                 AVPacket pkt = {};
 986                 av_init_packet(&pkt);
 987
 988                 int got_packet = 0;
 989
 990                 FF(func(
 991                         st.codec,
 992                         &pkt,
 993                         src_av_frame.get(),
 994                         &got_packet));
 995
 996                 if(!got_packet || pkt.size <= 0)
 997                         return false;
 998
 999                 pkt.stream_index = st.index;
1000
1001                 if (pkt.pts != AV_NOPTS_VALUE)
1002                 {
1003                         pkt.pts =
1004                                 av_rescale_q(
1005                                         pkt.pts,
1006                                         st.codec->time_base,
1007                                         st.time_base);
1008                 }
1009
1010                 if (pkt.dts != AV_NOPTS_VALUE)
1011                 {
1012                         pkt.dts =
1013                                 av_rescale_q(
1014                                         pkt.dts,
1015                                         st.codec->time_base,
1016                                         st.time_base);
1017                 }
1018
1019                 pkt.duration =
1020                         static_cast<int>(
1021                                 av_rescale_q(
1022                                         pkt.duration,
1023                                         st.codec->time_base, st.time_base));
1024
1025                 write_packet(
1026                         std::shared_ptr<AVPacket>(
1027                                 new AVPacket(pkt),
1028                                 [](AVPacket* p)
1029                                 {
1030                                         av_free_packet(p);
1031                                         delete p;
1032                                 }), token);
1033
1034                 return true;
1035         }
1036
1037         void write_packet(
1038                         const std::shared_ptr<AVPacket>& pkt_ptr,
1039                         std::shared_ptr<void> token)
1040         {
1041                 write_executor_.begin_invoke([this, pkt_ptr, token]() mutable
1042                 {
1043                         FF(av_interleaved_write_frame(
1044                                 oc_.get(),
1045                                 pkt_ptr.get()));
1046                 });
1047         }
1048
1049         template<typename T>
1050         static boost::optional<T> try_remove_arg(
1051                         std::map<std::string, std::string>& options,
1052                         const boost::regex& expr)
1053         {
1054                 for(auto it = options.begin(); it != options.end(); ++it)
1055                 {
1056                         if(boost::regex_search(it->first, expr))
1057                         {
1058                                 auto arg = it->second;
1059                                 options.erase(it);
1060                                 return boost::lexical_cast<T>(arg);
1061                         }
1062                 }
1063
1064                 return boost::optional<T>();
1065         }
1066
1067         static std::map<std::string, std::string> remove_options(
1068                         std::map<std::string, std::string>& options,
1069                         const boost::regex& expr)
1070         {
1071                 std::map<std::string, std::string> result;
1072
1073                 auto it = options.begin();
1074                 while(it != options.end())
1075                 {
1076                         boost::smatch what;
1077                         if(boost::regex_search(it->first, what, expr))
1078                         {
1079                                 result[
1080                                         what.size() > 0 && what[1].matched
1081                                                 ? what[1].str()
1082                                                 : it->first] = it->second;
1083                                 it = options.erase(it);
1084                         }
1085                         else
1086                                 ++it;
1087                 }
1088
1089                 return result;
1090         }
1091
1092         static void to_dict(AVDictionary** dest, const std::map<std::string, std::string>& c)
1093         {
1094                 for (const auto& entry : c)
1095                 {
1096                         av_dict_set(
1097                                 dest,
1098                                 entry.first.c_str(),
1099                                 entry.second.c_str(), 0);
1100                 }
1101         }
1102
1103         static std::map<std::string, std::string> to_map(AVDictionary* dict)
1104         {
1105                 std::map<std::string, std::string> result;
1106
1107                 for(auto t = dict
1108                                 ? av_dict_get(
1109                                         dict,
1110                                         "",
1111                                         nullptr,
1112                                         AV_DICT_IGNORE_SUFFIX)
1113                                 : nullptr;
1114                         t;
1115                         t = av_dict_get(
1116                                 dict,
1117                                 "",
1118                                 t,
1119                                 AV_DICT_IGNORE_SUFFIX))
1120                 {
1121                         result[t->key] = t->value;
1122                 }
1123
1124                 return result;
1125         }
1126 };
1127
1128 void describe_streaming_consumer(core::help_sink& sink, const core::help_repository& repo)
1129 {
1130         sink.short_description(L"For streaming the contents of a channel using FFmpeg.");
1131         sink.syntax(L"STREAM [url:string] {-[ffmpeg_param1:string] [value1:string] {-[ffmpeg_param2:string] [value2:string] {...}}}");
1132         sink.para()->text(L"For streaming the contents of a channel using FFmpeg");
1133         sink.definitions()
1134                 ->item(L"url", L"The stream URL to create/stream to.")
1135                 ->item(L"ffmpeg_paramX", L"A parameter supported by FFmpeg. For example vcodec or acodec etc.");
1136         sink.para()->text(L"Examples:");
1137         sink.example(L">> ADD 1 STREAM udp://<client_ip_address>:9250 -format mpegts -vcodec libx264 -crf 25 -tune zerolatency -preset ultrafast");
1138 }
1139
1140 spl::shared_ptr<core::frame_consumer> create_streaming_consumer(
1141                 const std::vector<std::wstring>& params, core::interaction_sink*, std::vector<spl::shared_ptr<core::video_channel>> channels)
1142 {
1143         if (params.size() < 1 || (!boost::iequals(params.at(0), L"STREAM") && !boost::iequals(params.at(0), L"FILE")))
1144                 return core::frame_consumer::empty();
1145
1146         auto compatibility_mode = boost::iequals(params.at(0), L"FILE");
1147         auto path = u8(params.size() > 1 ? params.at(1) : L"");
1148         auto args = u8(boost::join(params, L" "));
1149
1150         return spl::make_shared<streaming_consumer>(path, args, compatibility_mode);
1151 }
1152
1153 spl::shared_ptr<core::frame_consumer> create_preconfigured_streaming_consumer(
1154                 const boost::property_tree::wptree& ptree, core::interaction_sink*, std::vector<spl::shared_ptr<core::video_channel>> channels)
1155 {
1156         return spl::make_shared<streaming_consumer>(
1157                         u8(ptree_get<std::wstring>(ptree, L"path")),
1158                         u8(ptree.get<std::wstring>(L"args", L"")),
1159                         false);
1160 }
1161
1162 }}