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

   1 /*
   2 * Copyright (c) 2011 Sveriges Television AB <info@casparcg.com>
   3 *
   4 * This file is part of CasparCG (www.casparcg.com).
   5 *
   6 * CasparCG is free software: you can redistribute it and/or modify
   7 * it under the terms of the GNU General Public License as published by
   8 * the Free Software Foundation, either version 3 of the License, or
   9 * (at your option) any later version.
  10 *
  11 * CasparCG is distributed in the hope that it will be useful,
  12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 * GNU General Public License for more details.
  15 *
  16 * You should have received a copy of the GNU General Public License
  17 * along with CasparCG. If not, see <http://www.gnu.org/licenses/>.
  18 *
  19 * Author: Robert Nagy, ronag89@gmail.com
  20 */
  21
  22 #include "../StdAfx.h"
  23
  24 #include "../ffmpeg_error.h"
  25
  26 #include "ffmpeg_consumer.h"
  27
  28 #include "../producer/tbb_avcodec.h"
  29
  30 #include <core/frame/frame.h>
  31 #include <core/mixer/audio/audio_util.h>
  32 #include <core/consumer/frame_consumer.h>
  33 #include <core/video_format.h>
  34 #include <core/help/help_repository.h>
  35 #include <core/help/help_sink.h>
  36
  37 #include <common/array.h>
  38 #include <common/env.h>
  39 #include <common/except.h>
  40 #include <common/executor.h>
  41 #include <common/future.h>
  42 #include <common/diagnostics/graph.h>
  43 #include <common/lock.h>
  44 #include <common/memory.h>
  45 #include <common/param.h>
  46 #include <common/utf.h>
  47 #include <common/assert.h>
  48 #include <common/memshfl.h>
  49 #include <common/timer.h>
  50
  51 #include <boost/algorithm/string.hpp>
  52 #include <boost/property_tree/ptree.hpp>
  53 #include <boost/filesystem.hpp>
  54 #include <boost/range/algorithm.hpp>
  55 #include <boost/range/algorithm_ext.hpp>
  56 #include <boost/lexical_cast.hpp>
  57
  58 #include <tbb/spin_mutex.h>
  59
  60 #include <numeric>
  61 #include <cstring>
  62
  63 #if defined(_MSC_VER)
  64 #pragma warning (push)
  65 #pragma warning (disable : 4244)
  66 #endif
  67 extern "C"
  68 {
  69         #define __STDC_CONSTANT_MACROS
  70         #define __STDC_LIMIT_MACROS
  71         #include <libavformat/avformat.h>
  72         #include <libswscale/swscale.h>
  73         #include <libavutil/opt.h>
  74         #include <libavutil/pixdesc.h>
  75         #include <libavutil/parseutils.h>
  76         #include <libavutil/samplefmt.h>
  77         #include <libswresample/swresample.h>
  78 }
  79 #if defined(_MSC_VER)
  80 #pragma warning (pop)
  81 #endif
  82
  83 namespace caspar { namespace ffmpeg {
  84
  85 int av_opt_set(void *obj, const char *name, const char *val, int search_flags)
  86 {
  87         AVClass* av_class = *(AVClass**)obj;
  88
  89         if((strcmp(name, "pix_fmt") == 0 || strcmp(name, "pixel_format") == 0) && strcmp(av_class->class_name, "AVCodecContext") == 0)
  90         {
  91                 AVCodecContext* c = (AVCodecContext*)obj;
  92                 auto pix_fmt = av_get_pix_fmt(val);
  93                 if(pix_fmt == PIX_FMT_NONE)
  94                         return -1;
  95                 c->pix_fmt = pix_fmt;
  96                 return 0;
  97         }
  98         //if((strcmp(name, "r") == 0 || strcmp(name, "frame_rate") == 0) && strcmp(av_class->class_name, "AVCodecContext") == 0)
  99         //{
 100         //      AVCodecContext* c = (AVCodecContext*)obj;
 101
 102         //      if(c->codec_type != AVMEDIA_TYPE_VIDEO)
 103         //              return -1;
 104
 105         //      AVRational rate;
 106         //      int ret = av_parse_video_rate(&rate, val);
 107         //      if(ret < 0)
 108         //              return ret;
 109
 110         //      c->time_base.num = rate.den;
 111         //      c->time_base.den = rate.num;
 112         //      return 0;
 113         //}
 114
 115         return ::av_opt_set(obj, name, val, search_flags);
 116 }
 117
 118 struct option
 119 {
 120         std::string name;
 121         std::string value;
 122
 123         option(std::string name, std::string value)
 124                 : name(std::move(name))
 125                 , value(std::move(value))
 126         {
 127         }
 128 };
 129
 130 struct output_format
 131 {
 132         AVOutputFormat* format;
 133         int                             width;
 134         int                             height;
 135         AVCodecID               vcodec;
 136         AVCodecID               acodec;
 137         int                             croptop;
 138         int                             cropbot;
 139
 140         output_format(const core::video_format_desc& format_desc, const std::string& filename, std::vector<option>& options)
 141                 : format(av_guess_format(nullptr, filename.c_str(), nullptr))
 142                 , width(format_desc.width)
 143                 , height(format_desc.height)
 144                 , vcodec(CODEC_ID_NONE)
 145                 , acodec(CODEC_ID_NONE)
 146                 , croptop(0)
 147                 , cropbot(0)
 148         {
 149                 if(boost::iequals(boost::filesystem::path(filename).extension().string(), ".dv"))
 150                         set_opt("f", "dv");
 151
 152                 boost::range::remove_erase_if(options, [&](const option& o)
 153                 {
 154                         return set_opt(o.name, o.value);
 155                 });
 156
 157                 if(vcodec == CODEC_ID_NONE && format)
 158                         vcodec = format->video_codec;
 159
 160                 if(acodec == CODEC_ID_NONE && format)
 161                         acodec = format->audio_codec;
 162
 163                 if(vcodec == CODEC_ID_NONE)
 164                         vcodec = CODEC_ID_H264;
 165
 166                 if(acodec == CODEC_ID_NONE)
 167                         acodec = CODEC_ID_PCM_S16LE;
 168         }
 169
 170         bool set_opt(const std::string& name, const std::string& value)
 171         {
 172                 //if(name == "target")
 173                 //{
 174                 //      enum { PAL, NTSC, FILM, UNKNOWN } norm = UNKNOWN;
 175                 //
 176                 //      if(name.find("pal-") != std::string::npos)
 177                 //              norm = PAL;
 178                 //      else if(name.find("ntsc-") != std::string::npos)
 179                 //              norm = NTSC;
 180
 181                 //      if(norm == UNKNOWN)
 182                 //              CASPAR_THROW_EXCEPTION(invalid_argument() << arg_name_info("target"));
 183                 //
 184                 //      if (name.find("-dv") != std::string::npos)
 185                 //      {
 186                 //              set_opt("f", "dv");
 187                 //              if(norm == PAL)
 188                 //              {
 189                 //                      set_opt("s", "720x576");
 190                 //              }
 191                 //              else
 192                 //              {
 193                 //                      set_opt("s", "720x480");
 194                 //                      if(height == 486)
 195                 //                      {
 196                 //                              set_opt("croptop", "2");
 197                 //                              set_opt("cropbot", "4");
 198                 //                      }
 199                 //              }
 200                 //              set_opt("s", norm == PAL ? "720x576" : "720x480");
 201                 //      }
 202
 203                 //      return true;
 204                 //}
 205                 //else
 206                 if(name == "f")
 207                 {
 208                         format = av_guess_format(value.c_str(), nullptr, nullptr);
 209
 210                         if(format == nullptr)
 211                                 CASPAR_THROW_EXCEPTION(invalid_argument() << arg_name_info("f"));
 212
 213                         return true;
 214                 }
 215                 else if(name == "vcodec" || name == "v:codec")
 216                 {
 217                         auto c = avcodec_find_encoder_by_name(value.c_str());
 218                         if(c == nullptr)
 219                                 CASPAR_THROW_EXCEPTION(invalid_argument() << arg_name_info("vcodec"));
 220
 221                         vcodec = avcodec_find_encoder_by_name(value.c_str())->id;
 222                         return true;
 223
 224                 }
 225                 else if(name == "acodec" || name == "a:codec")
 226                 {
 227                         auto c = avcodec_find_encoder_by_name(value.c_str());
 228                         if(c == nullptr)
 229                                 CASPAR_THROW_EXCEPTION(invalid_argument() << arg_name_info("acodec"));
 230
 231                         acodec = avcodec_find_encoder_by_name(value.c_str())->id;
 232
 233                         return true;
 234                 }
 235                 else if(name == "s")
 236                 {
 237                         if(av_parse_video_size(&width, &height, value.c_str()) < 0)
 238                                 CASPAR_THROW_EXCEPTION(invalid_argument() << arg_name_info("s"));
 239
 240                         return true;
 241                 }
 242                 else if(name == "croptop")
 243                 {
 244                         croptop = boost::lexical_cast<int>(value);
 245
 246                         return true;
 247                 }
 248                 else if(name == "cropbot")
 249                 {
 250                         cropbot = boost::lexical_cast<int>(value);
 251
 252                         return true;
 253                 }
 254
 255                 return false;
 256         }
 257 };
 258
 259 typedef cache_aligned_vector<uint8_t> byte_vector;
 260
 261 struct ffmpeg_consumer : boost::noncopyable
 262 {
 263         const spl::shared_ptr<diagnostics::graph>       graph_;
 264         const std::string                                                       filename_;
 265         const std::shared_ptr<AVFormatContext>          oc_                                     { avformat_alloc_context(), av_free };
 266         const core::video_format_desc                           format_desc_;
 267
 268         core::monitor::subject                                          monitor_subject_;
 269
 270         tbb::spin_mutex                                                         exception_mutex_;
 271         std::exception_ptr                                                      exception_;
 272
 273         std::shared_ptr<AVStream>                                       audio_st_;
 274         std::shared_ptr<AVStream>                                       video_st_;
 275
 276         byte_vector                                                                     picture_buffer_;
 277         byte_vector                                                                     key_picture_buf_;
 278         byte_vector                                                                     audio_buffer_;
 279         std::shared_ptr<SwrContext>                                     swr_;
 280         std::shared_ptr<SwsContext>                                     sws_;
 281
 282         int64_t                                                                         frame_number_           = 0;
 283
 284         output_format                                                           output_format_;
 285         bool                                                                            key_only_;
 286
 287         executor                                                                        executor_;
 288 public:
 289         ffmpeg_consumer(const std::string& filename, const core::video_format_desc& format_desc, std::vector<option> options, bool key_only)
 290                 : filename_(filename)
 291                 , format_desc_(format_desc)
 292                 , output_format_(format_desc, filename, options)
 293                 , key_only_(key_only)
 294                 , executor_(print())
 295         {
 296                 check_space();
 297
 298                 // TODO: Ask stakeholders about case where file already exists.
 299                 boost::filesystem::remove(boost::filesystem::path(env::media_folder() + u16(filename))); // Delete the file if it exists
 300
 301                 graph_->set_color("frame-time", diagnostics::color(0.1f, 1.0f, 0.1f));
 302                 graph_->set_color("dropped-frame", diagnostics::color(0.3f, 0.6f, 0.3f));
 303                 graph_->set_text(print());
 304                 diagnostics::register_graph(graph_);
 305
 306                 executor_.set_capacity(8);
 307
 308                 oc_->oformat = output_format_.format;
 309
 310                 std::strcpy(oc_->filename, filename_.c_str());
 311
 312                 //  Add the audio and video streams using the default format codecs     and initialize the codecs.
 313                 video_st_ = add_video_stream(options);
 314
 315                 if (!key_only)
 316                         audio_st_ = add_audio_stream(options);
 317
 318                 av_dump_format(oc_.get(), 0, filename_.c_str(), 1);
 319
 320                 // Open the output ffmpeg, if needed.
 321                 if (!(oc_->oformat->flags & AVFMT_NOFILE))
 322                         THROW_ON_ERROR2(avio_open(&oc_->pb, filename.c_str(), AVIO_FLAG_WRITE), "[ffmpeg_consumer]");
 323
 324                 THROW_ON_ERROR2(avformat_write_header(oc_.get(), nullptr), "[ffmpeg_consumer]");
 325
 326                 if(options.size() > 0)
 327                 {
 328                         for (auto& option : options)
 329                                 CASPAR_LOG(warning) << L"Invalid option: -" << u16(option.name) << L" " << u16(option.value);
 330                 }
 331
 332                 CASPAR_LOG(info) << print() << L" Successfully Initialized.";
 333         }
 334
 335         ~ffmpeg_consumer()
 336         {
 337                 try
 338                 {
 339                         executor_.wait();
 340                 }
 341                 catch(...)
 342                 {
 343                         CASPAR_LOG_CURRENT_EXCEPTION();
 344                 }
 345
 346                 LOG_ON_ERROR2(av_write_trailer(oc_.get()), "[ffmpeg_consumer]");
 347
 348                 if (!key_only_)
 349                         audio_st_.reset();
 350
 351                 video_st_.reset();
 352
 353                 if (!(oc_->oformat->flags & AVFMT_NOFILE))
 354                         LOG_ON_ERROR2(avio_close(oc_->pb), "[ffmpeg_consumer]");
 355
 356                 CASPAR_LOG(info) << print() << L" Successfully Uninitialized.";
 357         }
 358
 359         // frame_consumer
 360
 361         void send(core::const_frame& frame)
 362         {
 363                 auto exception = lock(exception_mutex_, [&]
 364                 {
 365                         return exception_;
 366                 });
 367
 368                 if(exception != nullptr)
 369                         std::rethrow_exception(exception);
 370
 371                 executor_.begin_invoke([=]
 372                 {
 373                         encode(frame);
 374                 });
 375         }
 376
 377         bool ready_for_frame() const
 378         {
 379                 return !executor_.is_full();
 380         }
 381
 382         void mark_dropped()
 383         {
 384                 graph_->set_tag("dropped-frame");
 385         }
 386
 387         std::wstring print() const
 388         {
 389                 return L"ffmpeg[" + u16(filename_) + L"]";
 390         }
 391
 392         core::monitor::subject& monitor_output()
 393         {
 394                 return monitor_subject_;
 395         }
 396
 397 private:
 398         std::shared_ptr<AVStream> add_video_stream(std::vector<option>& options)
 399         {
 400                 if(output_format_.vcodec == CODEC_ID_NONE)
 401                         return nullptr;
 402
 403                 auto st = av_new_stream(oc_.get(), 0);
 404                 if (!st)
 405                         CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Could not allocate video-stream.") << boost::errinfo_api_function("av_new_stream"));
 406
 407                 auto encoder = avcodec_find_encoder(output_format_.vcodec);
 408                 if (!encoder)
 409                         CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Codec not found."));
 410
 411                 auto c = st->codec;
 412
 413                 avcodec_get_context_defaults3(c, encoder);
 414
 415                 c->codec_id                     = output_format_.vcodec;
 416                 c->codec_type           = AVMEDIA_TYPE_VIDEO;
 417                 c->width                        = output_format_.width;
 418                 c->height                       = output_format_.height - output_format_.croptop - output_format_.cropbot;
 419                 c->time_base.den        = format_desc_.time_scale;
 420                 c->time_base.num        = format_desc_.duration;
 421                 c->gop_size                     = 25;
 422                 c->flags                   |= format_desc_.field_mode == core::field_mode::progressive ? 0 : (CODEC_FLAG_INTERLACED_ME | CODEC_FLAG_INTERLACED_DCT);
 423                 c->pix_fmt                      = c->pix_fmt != PIX_FMT_NONE ? c->pix_fmt : PIX_FMT_YUV420P;
 424
 425                 if(c->codec_id == CODEC_ID_PRORES)
 426                 {
 427                         c->bit_rate     = output_format_.width < 1280 ? 63*1000000 : 220*1000000;
 428                         c->pix_fmt      = PIX_FMT_YUV422P10;
 429                 }
 430                 else if(c->codec_id == CODEC_ID_DNXHD)
 431                 {
 432                         if(c->width < 1280 || c->height < 720)
 433                                 CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Unsupported video dimensions."));
 434
 435                         c->bit_rate     = 220*1000000;
 436                         c->pix_fmt      = PIX_FMT_YUV422P;
 437                 }
 438                 else if(c->codec_id == CODEC_ID_DVVIDEO)
 439                 {
 440                         c->width = c->height == 1280 ? 960  : c->width;
 441
 442                         if(format_desc_.format == core::video_format::ntsc)
 443                         {
 444                                 c->pix_fmt = PIX_FMT_YUV411P;
 445                                 output_format_.croptop = 2;
 446                                 output_format_.cropbot = 4;
 447                                 c->height                          = output_format_.height - output_format_.croptop - output_format_.cropbot;
 448                         }
 449                         else if(format_desc_.format == core::video_format::pal)
 450                                 c->pix_fmt = PIX_FMT_YUV420P;
 451                         else // dv50
 452                                 c->pix_fmt = PIX_FMT_YUV422P;
 453
 454                         if(format_desc_.duration == 1001)
 455                                 c->width = c->height == 1080 ? 1280 : c->width;
 456                         else
 457                                 c->width = c->height == 1080 ? 1440 : c->width;
 458                 }
 459                 else if(c->codec_id == CODEC_ID_H264)
 460                 {
 461                         c->pix_fmt = PIX_FMT_YUV420P;
 462                         av_opt_set(c->priv_data, "preset", "ultrafast", 0);
 463                         av_opt_set(c->priv_data, "tune",   "fastdecode",   0);
 464                         av_opt_set(c->priv_data, "crf",    "5",     0);
 465                 }
 466                 else if(c->codec_id == CODEC_ID_QTRLE)
 467                 {
 468                         c->pix_fmt = PIX_FMT_ARGB;
 469                 }
 470
 471                 boost::range::remove_erase_if(options, [&](const option& o)
 472                 {
 473                         return o.name.at(0) != 'a' && ffmpeg::av_opt_set(c, o.name.c_str(), o.value.c_str(), AV_OPT_SEARCH_CHILDREN) > -1;
 474                 });
 475
 476                 if(output_format_.format->flags & AVFMT_GLOBALHEADER)
 477                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 478
 479                 THROW_ON_ERROR2(tbb_avcodec_open(c, encoder), "[ffmpeg_consumer]");
 480
 481                 return std::shared_ptr<AVStream>(st, [](AVStream* st)
 482                 {
 483                         LOG_ON_ERROR2(tbb_avcodec_close(st->codec), "[ffmpeg_consumer]");
 484                         av_freep(&st->codec);
 485                         av_freep(&st);
 486                 });
 487         }
 488
 489         std::shared_ptr<AVStream> add_audio_stream(std::vector<option>& options)
 490         {
 491                 if(output_format_.acodec == CODEC_ID_NONE)
 492                         return nullptr;
 493
 494                 auto st = av_new_stream(oc_.get(), 1);
 495                 if(!st)
 496                         CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Could not allocate audio-stream") << boost::errinfo_api_function("av_new_stream"));
 497
 498                 auto encoder = avcodec_find_encoder(output_format_.acodec);
 499                 if (!encoder)
 500                         CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("codec not found"));
 501
 502                 auto c = st->codec;
 503
 504                 avcodec_get_context_defaults3(c, encoder);
 505
 506                 c->codec_id                     = output_format_.acodec;
 507                 c->codec_type           = AVMEDIA_TYPE_AUDIO;
 508                 c->sample_rate          = 48000;
 509                 c->channels                     = 2;
 510                 c->sample_fmt           = AV_SAMPLE_FMT_S16;
 511                 c->time_base.num        = 1;
 512                 c->time_base.den        = c->sample_rate;
 513
 514                 if(output_format_.vcodec == CODEC_ID_FLV1)
 515                         c->sample_rate  = 44100;
 516
 517                 if(output_format_.format->flags & AVFMT_GLOBALHEADER)
 518                         c->flags |= CODEC_FLAG_GLOBAL_HEADER;
 519
 520                 boost::range::remove_erase_if(options, [&](const option& o)
 521                 {
 522                         return ffmpeg::av_opt_set(c, o.name.c_str(), o.value.c_str(), AV_OPT_SEARCH_CHILDREN) > -1;
 523                 });
 524
 525                 THROW_ON_ERROR2(avcodec_open2(c, encoder, nullptr), "[ffmpeg_consumer]");
 526
 527                 return std::shared_ptr<AVStream>(st, [](AVStream* st)
 528                 {
 529                         LOG_ON_ERROR2(avcodec_close(st->codec), "[ffmpeg_consumer]");;
 530                         av_freep(&st->codec);
 531                         av_freep(&st);
 532                 });
 533         }
 534
 535         void encode_video_frame(core::const_frame frame)
 536         {
 537                 if(!video_st_)
 538                         return;
 539
 540                 auto enc = video_st_->codec;
 541
 542                 auto av_frame                           = convert_video(frame, enc);
 543                 av_frame->interlaced_frame      = format_desc_.field_mode != core::field_mode::progressive;
 544                 av_frame->top_field_first       = format_desc_.field_mode == core::field_mode::upper;
 545                 av_frame->pts                           = frame_number_++;
 546
 547                 monitor_subject_ << core::monitor::message("/frame")
 548                                 % static_cast<int64_t>(frame_number_)
 549                                 % static_cast<int64_t>(std::numeric_limits<int64_t>::max());
 550
 551                 AVPacket pkt;
 552                 av_init_packet(&pkt);
 553                 pkt.data = nullptr;
 554                 pkt.size = 0;
 555
 556                 int got_packet = 0;
 557                 THROW_ON_ERROR2(avcodec_encode_video2(enc, &pkt, av_frame.get(), &got_packet), "[ffmpeg_consumer]");
 558                 std::shared_ptr<AVPacket> guard(&pkt, av_free_packet);
 559
 560                 if(!got_packet)
 561                         return;
 562
 563                 if (pkt.pts != AV_NOPTS_VALUE)
 564                         pkt.pts = av_rescale_q(pkt.pts, enc->time_base, video_st_->time_base);
 565                 if (pkt.dts != AV_NOPTS_VALUE)
 566                         pkt.dts = av_rescale_q(pkt.dts, enc->time_base, video_st_->time_base);
 567
 568                 pkt.stream_index = video_st_->index;
 569
 570                 THROW_ON_ERROR2(av_interleaved_write_frame(oc_.get(), &pkt), "[ffmpeg_consumer]");
 571         }
 572
 573         uint64_t get_channel_layout(AVCodecContext* dec)
 574         {
 575                 auto layout = (dec->channel_layout && dec->channels == av_get_channel_layout_nb_channels(dec->channel_layout)) ? dec->channel_layout : av_get_default_channel_layout(dec->channels);
 576                 return layout;
 577         }
 578
 579         void encode_audio_frame(core::const_frame frame)
 580         {
 581                 if(!audio_st_)
 582                         return;
 583
 584                 auto enc = audio_st_->codec;
 585
 586                 boost::push_back(audio_buffer_, convert_audio(frame, enc));
 587
 588                 auto frame_size = enc->frame_size != 0 ? enc->frame_size * enc->channels * av_get_bytes_per_sample(enc->sample_fmt) : static_cast<int>(audio_buffer_.size());
 589
 590                 while(audio_buffer_.size() >= frame_size)
 591                 {
 592                         std::shared_ptr<AVFrame> av_frame(avcodec_alloc_frame(), av_free);
 593                         avcodec_get_frame_defaults(av_frame.get());
 594                         av_frame->nb_samples = frame_size / (enc->channels * av_get_bytes_per_sample(enc->sample_fmt));
 595
 596                         AVPacket pkt;
 597                         av_init_packet(&pkt);
 598                         pkt.data = nullptr;
 599                         pkt.size = 0;
 600
 601                         THROW_ON_ERROR2(avcodec_fill_audio_frame(av_frame.get(), enc->channels, enc->sample_fmt, audio_buffer_.data(), frame_size, 1), "[ffmpeg_consumer]");
 602
 603                         int got_packet = 0;
 604                         THROW_ON_ERROR2(avcodec_encode_audio2(enc, &pkt, av_frame.get(), &got_packet), "[ffmpeg_consumer]");
 605                         std::shared_ptr<AVPacket> guard(&pkt, av_free_packet);
 606
 607                         audio_buffer_.erase(audio_buffer_.begin(), audio_buffer_.begin() + frame_size);
 608
 609                         if(!got_packet)
 610                                 return;
 611
 612                         if (pkt.pts != AV_NOPTS_VALUE)
 613                                 pkt.pts      = av_rescale_q(pkt.pts, enc->time_base, audio_st_->time_base);
 614                         if (pkt.dts != AV_NOPTS_VALUE)
 615                                 pkt.dts      = av_rescale_q(pkt.dts, enc->time_base, audio_st_->time_base);
 616                         if (pkt.duration > 0)
 617                                 pkt.duration = static_cast<int>(av_rescale_q(pkt.duration, enc->time_base, audio_st_->time_base));
 618
 619                         pkt.stream_index = audio_st_->index;
 620
 621                         THROW_ON_ERROR2(av_interleaved_write_frame(oc_.get(), &pkt), "[ffmpeg_consumer]");
 622                 }
 623         }
 624
 625         std::shared_ptr<AVFrame> convert_video(core::const_frame frame, AVCodecContext* c)
 626         {
 627                 if(!sws_)
 628                 {
 629                         sws_.reset(sws_getContext(format_desc_.width,
 630                                                                           format_desc_.height - output_format_.croptop  - output_format_.cropbot,
 631                                                                           PIX_FMT_BGRA,
 632                                                                           c->width,
 633                                                                           c->height,
 634                                                                           c->pix_fmt,
 635                                                                           SWS_BICUBIC, nullptr, nullptr, nullptr),
 636                                                 sws_freeContext);
 637                         if (sws_ == nullptr)
 638                                 CASPAR_THROW_EXCEPTION(caspar_exception() << msg_info("Cannot initialize the conversion context"));
 639                 }
 640
 641                 // #in_frame
 642
 643                 std::shared_ptr<AVFrame> in_frame(avcodec_alloc_frame(), av_free);
 644
 645                 auto in_picture = reinterpret_cast<AVPicture*>(in_frame.get());
 646
 647                 if (key_only_)
 648                 {
 649                         key_picture_buf_.resize(frame.image_data().size());
 650                         in_picture->linesize[0] = format_desc_.width * 4;
 651                         in_picture->data[0] = key_picture_buf_.data();
 652
 653                         aligned_memshfl(in_picture->data[0], frame.image_data().begin(), frame.image_data().size(), 0x0F0F0F0F, 0x0B0B0B0B, 0x07070707, 0x03030303);
 654                 }
 655                 else
 656                 {
 657                         avpicture_fill(
 658                                         in_picture,
 659                                         const_cast<uint8_t*>(frame.image_data().begin()),
 660                                         PIX_FMT_BGRA,
 661                                         format_desc_.width,
 662                                         format_desc_.height - output_format_.croptop  - output_format_.cropbot);
 663                 }
 664
 665                 // crop-top
 666
 667                 for(int n = 0; n < 4; ++n)
 668                         in_frame->data[n] += in_frame->linesize[n] * output_format_.croptop;
 669
 670                 // #out_frame
 671
 672                 std::shared_ptr<AVFrame> out_frame(avcodec_alloc_frame(), av_free);
 673
 674                 av_image_fill_linesizes(out_frame->linesize, c->pix_fmt, c->width);
 675                 for(int n = 0; n < 4; ++n)
 676                         out_frame->linesize[n] += 32 - (out_frame->linesize[n] % 32); // align
 677
 678                 picture_buffer_.resize(av_image_fill_pointers(out_frame->data, c->pix_fmt, c->height, nullptr, out_frame->linesize));
 679                 av_image_fill_pointers(out_frame->data, c->pix_fmt, c->height, picture_buffer_.data(), out_frame->linesize);
 680
 681                 // #scale
 682
 683                 sws_scale(sws_.get(),
 684                                   in_frame->data,
 685                                   in_frame->linesize,
 686                                   0,
 687                                   format_desc_.height - output_format_.cropbot - output_format_.croptop,
 688                                   out_frame->data,
 689                                   out_frame->linesize);
 690
 691                 return out_frame;
 692         }
 693
 694         byte_vector convert_audio(core::const_frame& frame, AVCodecContext* c)
 695         {
 696                 if(!swr_)
 697                 {
 698                         swr_ = std::shared_ptr<SwrContext>(swr_alloc_set_opts(nullptr,
 699                                                                                 get_channel_layout(c), c->sample_fmt, c->sample_rate,
 700                                                                                 av_get_default_channel_layout(format_desc_.audio_channels), AV_SAMPLE_FMT_S32, format_desc_.audio_sample_rate,
 701                                                                                 0, nullptr), [](SwrContext* p){swr_free(&p);});
 702
 703                         if(!swr_)
 704                                 CASPAR_THROW_EXCEPTION(bad_alloc());
 705
 706                         THROW_ON_ERROR2(swr_init(swr_.get()), "[audio_decoder]");
 707                 }
 708
 709                 byte_vector buffer(48000);
 710
 711                 const uint8_t* in[]  = {reinterpret_cast<const uint8_t*>(frame.audio_data().data())};
 712                 uint8_t*       out[] = {buffer.data()};
 713
 714                 auto channel_samples = swr_convert(swr_.get(),
 715                                                                                    out, static_cast<int>(buffer.size()) / c->channels / av_get_bytes_per_sample(c->sample_fmt),
 716                                                                                    in, static_cast<int>(frame.audio_data().size()/format_desc_.audio_channels));
 717
 718                 buffer.resize(channel_samples * c->channels * av_get_bytes_per_sample(c->sample_fmt));
 719
 720                 return buffer;
 721         }
 722
 723         void check_space()
 724         {
 725                 auto space = boost::filesystem::space(boost::filesystem::path(filename_).parent_path());
 726                 if(space.available < 512*1000000)
 727                         BOOST_THROW_EXCEPTION(file_write_error() << msg_info("out of space"));
 728         }
 729
 730         void encode(const core::const_frame& frame)
 731         {
 732                 try
 733                 {
 734                         if(frame_number_ % 25 == 0)
 735                                 check_space();
 736
 737                         caspar::timer frame_timer;
 738
 739                         encode_video_frame(frame);
 740                         encode_audio_frame(frame);
 741
 742                         graph_->set_value("frame-time", frame_timer.elapsed()*format_desc_.fps*0.5);
 743                 }
 744                 catch(...)
 745                 {
 746                         lock(exception_mutex_, [&]
 747                         {
 748                                 exception_ = std::current_exception();
 749                         });
 750                 }
 751         }
 752 };
 753
 754 struct ffmpeg_consumer_proxy : public core::frame_consumer
 755 {
 756         const std::wstring                      filename_;
 757         const std::vector<option>       options_;
 758         const bool                                      separate_key_;
 759
 760         std::unique_ptr<ffmpeg_consumer> consumer_;
 761         std::unique_ptr<ffmpeg_consumer> key_only_consumer_;
 762
 763 public:
 764
 765         ffmpeg_consumer_proxy(const std::wstring& filename, const std::vector<option>& options, bool separate_key)
 766                 : filename_(filename)
 767                 , options_(options)
 768                 , separate_key_(separate_key_)
 769         {
 770         }
 771
 772         virtual void initialize(const core::video_format_desc& format_desc, int)
 773         {
 774                 if(consumer_)
 775                         BOOST_THROW_EXCEPTION(invalid_operation() << msg_info("Cannot reinitialize ffmpeg-consumer."));
 776
 777                 consumer_.reset(new ffmpeg_consumer(u8(filename_), format_desc, options_, false));
 778
 779                 if (separate_key_)
 780                 {
 781                         boost::filesystem::path fill_file(filename_);
 782                         auto without_extension = u16(fill_file.stem().string());
 783                         auto key_file = env::media_folder() + without_extension + L"_A" + u16(fill_file.extension().string());
 784
 785                         key_only_consumer_.reset(new ffmpeg_consumer(u8(key_file), format_desc, options_, true));
 786                 }
 787         }
 788
 789         std::future<bool> send(core::const_frame frame) override
 790         {
 791                 bool ready_for_frame = consumer_->ready_for_frame();
 792
 793                 if (ready_for_frame && separate_key_)
 794                         ready_for_frame = ready_for_frame && key_only_consumer_->ready_for_frame();
 795
 796                 if (ready_for_frame)
 797                 {
 798                         consumer_->send(frame);
 799
 800                         if (separate_key_)
 801                                 key_only_consumer_->send(frame);
 802                 }
 803                 else
 804                 {
 805                         consumer_->mark_dropped();
 806
 807                         if (separate_key_)
 808                                 key_only_consumer_->mark_dropped();
 809                 }
 810
 811                 return make_ready_future(true);
 812         }
 813
 814         std::wstring print() const override
 815         {
 816                 return consumer_ ? consumer_->print() : L"[ffmpeg_consumer]";
 817         }
 818
 819         std::wstring name() const override
 820         {
 821                 return L"file";
 822         }
 823
 824         boost::property_tree::wptree info() const override
 825         {
 826                 boost::property_tree::wptree info;
 827                 info.add(L"type", L"file");
 828                 info.add(L"filename", filename_);
 829                 info.add(L"separate_key", separate_key_);
 830                 return info;
 831         }
 832
 833         bool has_synchronization_clock() const override
 834         {
 835                 return false;
 836         }
 837
 838         int buffer_depth() const override
 839         {
 840                 return -1;
 841         }
 842
 843         int index() const override
 844         {
 845                 return 200;
 846         }
 847
 848         core::monitor::subject& monitor_output()
 849         {
 850                 return consumer_->monitor_output();
 851         }
 852 };
 853
 854 void describe_consumer(core::help_sink& sink, const core::help_repository& repo)
 855 {
 856         sink.short_description(L"Can record a channel to a file supported by FFMpeg.");
 857         sink.syntax(L"FILE [filename:string] {-[ffmpeg_param1:string] [value1:string] {-[ffmpeg_param2:string] [value2:string] {...}}} {[separate_key:SEPARATE_KEY]}");
 858         sink.para()->text(L"Can record a channel to a file supported by FFMpeg.");
 859         sink.definitions()
 860                 ->item(L"filename", L"The filename under the media folder including the extension (decides which kind of container format that will be used).")
 861                 ->item(L"ffmpeg_paramX", L"A parameter supported by FFMpeg. For example vcodec or acodec etc.")
 862                 ->item(L"separate_key", L"If defined will create two files simultaneously -- One for fill and one for key (_A will be appended).")
 863                 ;
 864         sink.para()->text(L"Examples:");
 865         sink.example(L">> ADD 1 FILE output.mov -vcodec dnxhd");
 866         sink.example(L">> ADD 1 FILE output.mov -vcodec prores");
 867         sink.example(L">> ADD 1 FILE output.mov -vcodec dvvideo");
 868         sink.example(L">> ADD 1 FILE output.mov - vcodec libx264 -preset ultrafast -tune fastdecode -crf 25");
 869         sink.example(L">> ADD 1 FILE output.mov -vcodec dnxhd SEPARATE_KEY", L"for creating output.mov with fill and output_A.mov with key/alpha");
 870 }
 871
 872 spl::shared_ptr<core::frame_consumer> create_consumer(
 873                 const std::vector<std::wstring>& params, core::interaction_sink*)
 874 {
 875         auto params2 = params;
 876         auto separate_key_it = std::find_if(params2.begin(), params2.end(), param_comparer(L"SEPARATE_KEY"));
 877         bool separate_key = false;
 878
 879         if (separate_key_it != params2.end())
 880         {
 881                 separate_key = true;
 882                 params2.erase(separate_key_it);
 883         }
 884
 885         auto str = std::accumulate(params2.begin(), params2.end(), std::wstring(), [](const std::wstring& lhs, const std::wstring& rhs) {return lhs + L" " + rhs;});
 886
 887         boost::wregex path_exp(LR"(\s*FILE(\s(?<PATH>.+\.[^\s]+))?.*)", boost::regex::icase);
 888
 889         boost::wsmatch path;
 890         if(!boost::regex_match(str, path, path_exp))
 891                 return core::frame_consumer::empty();
 892
 893         boost::wregex opt_exp(LR"(-((?<NAME>[^\s]+)\s+(?<VALUE>[^\s]+)))");
 894
 895         std::vector<option> options;
 896         for(boost::wsregex_iterator it(str.begin(), str.end(), opt_exp); it != boost::wsregex_iterator(); ++it)
 897         {
 898                 auto name  = u8(boost::trim_copy(boost::to_lower_copy((*it)["NAME"].str())));
 899                 auto value = u8(boost::trim_copy(boost::to_lower_copy((*it)["VALUE"].str())));
 900
 901                 if(value == "h264")
 902                         value = "libx264";
 903                 else if(value == "dvcpro")
 904                         value = "dvvideo";
 905
 906                 options.push_back(option(name, value));
 907         }
 908
 909         return spl::make_shared<ffmpeg_consumer_proxy>(env::media_folder() + path["PATH"].str(), options, separate_key);
 910 }
 911
 912 spl::shared_ptr<core::frame_consumer> create_preconfigured_consumer(
 913                 const boost::property_tree::wptree& ptree, core::interaction_sink*)
 914 {
 915         auto filename           = ptree.get<std::wstring>(L"path");
 916         auto codec                      = ptree.get(L"vcodec", L"libx264");
 917         auto separate_key       = ptree.get(L"separate-key", false);
 918
 919         std::vector<option> options;
 920         options.push_back(option("vcodec", u8(codec)));
 921
 922         return spl::make_shared<ffmpeg_consumer_proxy>(env::media_folder() + filename, options, separate_key);
 923 }
 924
 925 }}