src/lib/ffmpeg_content.cc

   1 /*
   2     Copyright (C) 2013-2019 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic 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 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic 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 DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "ffmpeg_content.h"
  22 #include "video_content.h"
  23 #include "audio_content.h"
  24 #include "ffmpeg_examiner.h"
  25 #include "ffmpeg_subtitle_stream.h"
  26 #include "ffmpeg_audio_stream.h"
  27 #include "compose.hpp"
  28 #include "job.h"
  29 #include "util.h"
  30 #include "filter.h"
  31 #include "film.h"
  32 #include "log.h"
  33 #include "config.h"
  34 #include "exceptions.h"
  35 #include "frame_rate_change.h"
  36 #include "text_content.h"
  37 #include <dcp/raw_convert.h>
  38 #include <libcxml/cxml.h>
  39 extern "C" {
  40 #include <libavformat/avformat.h>
  41 #include <libavutil/pixdesc.h>
  42 }
  43 #include <libxml++/libxml++.h>
  44 #include <boost/foreach.hpp>
  45 #include <iostream>
  46
  47 #include "i18n.h"
  48
  49 using std::string;
  50 using std::vector;
  51 using std::list;
  52 using std::cout;
  53 using std::pair;
  54 using std::make_pair;
  55 using std::max;
  56 using boost::shared_ptr;
  57 using boost::dynamic_pointer_cast;
  58 using boost::optional;
  59 using dcp::raw_convert;
  60 using namespace dcpomatic;
  61
  62 int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
  63 int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
  64 int const FFmpegContentProperty::FILTERS = 102;
  65 int const FFmpegContentProperty::KDM = 103;
  66
  67 FFmpegContent::FFmpegContent (boost::filesystem::path p)
  68         : Content (p)
  69 {
  70
  71 }
  72
  73 template <class T>
  74 optional<T>
  75 get_optional_enum (cxml::ConstNodePtr node, string name)
  76 {
  77         optional<int> const v = node->optional_number_child<int>(name);
  78         if (!v) {
  79                 return optional<T>();
  80         }
  81         return static_cast<T>(*v);
  82 }
  83
  84 FFmpegContent::FFmpegContent (cxml::ConstNodePtr node, int version, list<string>& notes)
  85         : Content (node)
  86 {
  87         video = VideoContent::from_xml (this, node, version);
  88         audio = AudioContent::from_xml (this, node, version);
  89         text = TextContent::from_xml (this, node, version);
  90
  91         list<cxml::NodePtr> c = node->node_children ("SubtitleStream");
  92         for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
  93                 _subtitle_streams.push_back (shared_ptr<FFmpegSubtitleStream> (new FFmpegSubtitleStream (*i, version)));
  94                 if ((*i)->optional_number_child<int> ("Selected")) {
  95                         _subtitle_stream = _subtitle_streams.back ();
  96                 }
  97         }
  98
  99         c = node->node_children ("AudioStream");
 100         for (list<cxml::NodePtr>::const_iterator i = c.begin(); i != c.end(); ++i) {
 101                 shared_ptr<FFmpegAudioStream> as (new FFmpegAudioStream (*i, version));
 102                 audio->add_stream (as);
 103                 if (version < 11 && !(*i)->optional_node_child ("Selected")) {
 104                         /* This is an old file and this stream is not selected, so un-map it */
 105                         as->set_mapping (AudioMapping (as->channels (), MAX_DCP_AUDIO_CHANNELS));
 106                 }
 107         }
 108
 109         c = node->node_children ("Filter");
 110         for (list<cxml::NodePtr>::iterator i = c.begin(); i != c.end(); ++i) {
 111                 Filter const * f = Filter::from_id ((*i)->content ());
 112                 if (f) {
 113                         _filters.push_back (f);
 114                 } else {
 115                         notes.push_back (String::compose (_("DCP-o-matic no longer supports the `%1' filter, so it has been turned off."), (*i)->content()));
 116                 }
 117         }
 118
 119         optional<ContentTime::Type> const f = node->optional_number_child<ContentTime::Type> ("FirstVideo");
 120         if (f) {
 121                 _first_video = ContentTime (f.get ());
 122         }
 123
 124         _color_range = get_optional_enum<AVColorRange>(node, "ColorRange");
 125         _color_primaries = get_optional_enum<AVColorPrimaries>(node, "ColorPrimaries");
 126         _color_trc = get_optional_enum<AVColorTransferCharacteristic>(node, "ColorTransferCharacteristic");
 127         _colorspace = get_optional_enum<AVColorSpace>(node, "Colorspace");
 128         _bits_per_pixel = node->optional_number_child<int> ("BitsPerPixel");
 129 }
 130
 131 FFmpegContent::FFmpegContent (vector<shared_ptr<Content> > c)
 132         : Content (c)
 133 {
 134         vector<shared_ptr<Content> >::const_iterator i = c.begin ();
 135
 136         bool need_video = false;
 137         bool need_audio = false;
 138         bool need_text = false;
 139
 140         if (i != c.end ()) {
 141                 need_video = static_cast<bool> ((*i)->video);
 142                 need_audio = static_cast<bool> ((*i)->audio);
 143                 need_text = !(*i)->text.empty();
 144         }
 145
 146         while (i != c.end ()) {
 147                 if (need_video != static_cast<bool> ((*i)->video)) {
 148                         throw JoinError (_("Content to be joined must all have or not have video"));
 149                 }
 150                 if (need_audio != static_cast<bool> ((*i)->audio)) {
 151                         throw JoinError (_("Content to be joined must all have or not have audio"));
 152                 }
 153                 if (need_text != !(*i)->text.empty()) {
 154                         throw JoinError (_("Content to be joined must all have or not have subtitles or captions"));
 155                 }
 156                 ++i;
 157         }
 158
 159         if (need_video) {
 160                 video.reset (new VideoContent (this, c));
 161         }
 162         if (need_audio) {
 163                 audio.reset (new AudioContent (this, c));
 164         }
 165         if (need_text) {
 166                 text.push_back (shared_ptr<TextContent> (new TextContent (this, c)));
 167         }
 168
 169         shared_ptr<FFmpegContent> ref = dynamic_pointer_cast<FFmpegContent> (c[0]);
 170         DCPOMATIC_ASSERT (ref);
 171
 172         for (size_t i = 0; i < c.size(); ++i) {
 173                 shared_ptr<FFmpegContent> fc = dynamic_pointer_cast<FFmpegContent> (c[i]);
 174                 if (fc->only_text() && fc->only_text()->use() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) {
 175                         throw JoinError (_("Content to be joined must use the same subtitle stream."));
 176                 }
 177         }
 178
 179         /* XXX: should probably check that more of the stuff below is the same in *this and ref */
 180
 181         _subtitle_streams = ref->subtitle_streams ();
 182         _subtitle_stream = ref->subtitle_stream ();
 183         _first_video = ref->_first_video;
 184         _filters = ref->_filters;
 185         _color_range = ref->_color_range;
 186         _color_primaries = ref->_color_primaries;
 187         _color_trc = ref->_color_trc;
 188         _colorspace = ref->_colorspace;
 189         _bits_per_pixel = ref->_bits_per_pixel;
 190 }
 191
 192 void
 193 FFmpegContent::as_xml (xmlpp::Node* node, bool with_paths) const
 194 {
 195         node->add_child("Type")->add_child_text ("FFmpeg");
 196         Content::as_xml (node, with_paths);
 197
 198         if (video) {
 199                 video->as_xml (node);
 200         }
 201
 202         if (audio) {
 203                 audio->as_xml (node);
 204
 205                 BOOST_FOREACH (AudioStreamPtr i, audio->streams ()) {
 206                         shared_ptr<FFmpegAudioStream> f = dynamic_pointer_cast<FFmpegAudioStream> (i);
 207                         DCPOMATIC_ASSERT (f);
 208                         f->as_xml (node->add_child("AudioStream"));
 209                 }
 210         }
 211
 212         if (only_text()) {
 213                 only_text()->as_xml (node);
 214         }
 215
 216         boost::mutex::scoped_lock lm (_mutex);
 217
 218         for (vector<shared_ptr<FFmpegSubtitleStream> >::const_iterator i = _subtitle_streams.begin(); i != _subtitle_streams.end(); ++i) {
 219                 xmlpp::Node* t = node->add_child("SubtitleStream");
 220                 if (_subtitle_stream && *i == _subtitle_stream) {
 221                         t->add_child("Selected")->add_child_text("1");
 222                 }
 223                 (*i)->as_xml (t);
 224         }
 225
 226         for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
 227                 node->add_child("Filter")->add_child_text ((*i)->id ());
 228         }
 229
 230         if (_first_video) {
 231                 node->add_child("FirstVideo")->add_child_text (raw_convert<string> (_first_video.get().get()));
 232         }
 233
 234         if (_color_range) {
 235                 node->add_child("ColorRange")->add_child_text (raw_convert<string> (static_cast<int> (*_color_range)));
 236         }
 237         if (_color_primaries) {
 238                 node->add_child("ColorPrimaries")->add_child_text (raw_convert<string> (static_cast<int> (*_color_primaries)));
 239         }
 240         if (_color_trc) {
 241                 node->add_child("ColorTransferCharacteristic")->add_child_text (raw_convert<string> (static_cast<int> (*_color_trc)));
 242         }
 243         if (_colorspace) {
 244                 node->add_child("Colorspace")->add_child_text (raw_convert<string> (static_cast<int> (*_colorspace)));
 245         }
 246         if (_bits_per_pixel) {
 247                 node->add_child("BitsPerPixel")->add_child_text (raw_convert<string> (*_bits_per_pixel));
 248         }
 249 }
 250
 251 void
 252 FFmpegContent::examine (shared_ptr<const Film> film, shared_ptr<Job> job)
 253 {
 254         ChangeSignaller<Content> cc1 (this, FFmpegContentProperty::SUBTITLE_STREAMS);
 255         ChangeSignaller<Content> cc2 (this, FFmpegContentProperty::SUBTITLE_STREAM);
 256
 257         if (job) {
 258                 job->set_progress_unknown ();
 259         }
 260
 261         Content::examine (film, job);
 262
 263         shared_ptr<FFmpegExaminer> examiner (new FFmpegExaminer (shared_from_this (), job));
 264
 265         if (examiner->has_video ()) {
 266                 video.reset (new VideoContent (this));
 267                 video->take_from_examiner (examiner);
 268         }
 269
 270         boost::filesystem::path first_path = path (0);
 271
 272         {
 273                 boost::mutex::scoped_lock lm (_mutex);
 274
 275                 if (examiner->has_video ()) {
 276                         _first_video = examiner->first_video ();
 277                         _color_range = examiner->color_range ();
 278                         _color_primaries = examiner->color_primaries ();
 279                         _color_trc = examiner->color_trc ();
 280                         _colorspace = examiner->colorspace ();
 281                         _bits_per_pixel = examiner->bits_per_pixel ();
 282
 283                         if (examiner->rotation()) {
 284                                 double rot = *examiner->rotation ();
 285                                 if (fabs (rot - 180) < 1.0) {
 286                                         _filters.push_back (Filter::from_id ("vflip"));
 287                                         _filters.push_back (Filter::from_id ("hflip"));
 288                                 } else if (fabs (rot - 90) < 1.0) {
 289                                         _filters.push_back (Filter::from_id ("90clock"));
 290                                 } else if (fabs (rot - 270) < 1.0) {
 291                                         _filters.push_back (Filter::from_id ("90anticlock"));
 292                                 }
 293                         }
 294                 }
 295
 296                 if (!examiner->audio_streams().empty ()) {
 297                         audio.reset (new AudioContent (this));
 298
 299                         BOOST_FOREACH (shared_ptr<FFmpegAudioStream> i, examiner->audio_streams ()) {
 300                                 audio->add_stream (i);
 301                         }
 302
 303                         AudioStreamPtr as = audio->streams().front();
 304                         AudioMapping m = as->mapping ();
 305                         m.make_default (film ? film->audio_processor() : 0, first_path);
 306                         as->set_mapping (m);
 307                 }
 308
 309                 _subtitle_streams = examiner->subtitle_streams ();
 310                 if (!_subtitle_streams.empty ()) {
 311                         text.clear ();
 312                         text.push_back (shared_ptr<TextContent> (new TextContent (this, TEXT_OPEN_SUBTITLE, TEXT_UNKNOWN)));
 313                         _subtitle_stream = _subtitle_streams.front ();
 314                 }
 315         }
 316
 317         if (examiner->has_video ()) {
 318                 set_default_colour_conversion ();
 319         }
 320
 321         if (examiner->has_video() && examiner->pulldown() && video_frame_rate() && fabs(*video_frame_rate() - 29.97) < 0.001) {
 322                 /* FFmpeg has detected this file as 29.97 and the examiner thinks it is using "soft" 2:3 pulldown (telecine).
 323                  * This means we can treat it as a 23.976fps file.
 324                  */
 325                 set_video_frame_rate (24000.0 / 1001);
 326                 video->set_length (video->length() * 24.0 / 30);
 327         }
 328 }
 329
 330 string
 331 FFmpegContent::summary () const
 332 {
 333         if (video && audio) {
 334                 return String::compose (_("%1 [movie]"), path_summary ());
 335         } else if (video) {
 336                 return String::compose (_("%1 [video]"), path_summary ());
 337         } else if (audio) {
 338                 return String::compose (_("%1 [audio]"), path_summary ());
 339         }
 340
 341         return path_summary ();
 342 }
 343
 344 string
 345 FFmpegContent::technical_summary () const
 346 {
 347         string as = "";
 348         BOOST_FOREACH (shared_ptr<FFmpegAudioStream> i, ffmpeg_audio_streams ()) {
 349                 as += i->technical_summary () + " " ;
 350         }
 351
 352         if (as.empty ()) {
 353                 as = "none";
 354         }
 355
 356         string ss = "none";
 357         if (_subtitle_stream) {
 358                 ss = _subtitle_stream->technical_summary ();
 359         }
 360
 361         string filt = Filter::ffmpeg_string (_filters);
 362
 363         string s = Content::technical_summary ();
 364
 365         if (video) {
 366                 s += " - " + video->technical_summary ();
 367         }
 368
 369         if (audio) {
 370                 s += " - " + audio->technical_summary ();
 371         }
 372
 373         return s + String::compose (
 374                 "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt
 375                 );
 376 }
 377
 378 void
 379 FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
 380 {
 381         ChangeSignaller<Content> cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 382
 383         {
 384                 boost::mutex::scoped_lock lm (_mutex);
 385                 _subtitle_stream = s;
 386         }
 387 }
 388
 389 bool
 390 operator== (FFmpegStream const & a, FFmpegStream const & b)
 391 {
 392         return a._id == b._id;
 393 }
 394
 395 bool
 396 operator!= (FFmpegStream const & a, FFmpegStream const & b)
 397 {
 398         return a._id != b._id;
 399 }
 400
 401 DCPTime
 402 FFmpegContent::full_length (shared_ptr<const Film> film) const
 403 {
 404         FrameRateChange const frc (film, shared_from_this());
 405         if (video) {
 406                 return DCPTime::from_frames (llrint (video->length_after_3d_combine() * frc.factor()), film->video_frame_rate());
 407         }
 408
 409         if (audio) {
 410                 DCPTime longest;
 411                 BOOST_FOREACH (AudioStreamPtr i, audio->streams()) {
 412                         longest = max (longest, DCPTime::from_frames(llrint(i->length() / frc.speed_up), i->frame_rate()));
 413                 }
 414                 return longest;
 415         }
 416
 417         /* XXX: subtitle content? */
 418
 419         return DCPTime();
 420 }
 421
 422 DCPTime
 423 FFmpegContent::approximate_length () const
 424 {
 425         if (video) {
 426                 return DCPTime::from_frames (video->length_after_3d_combine(), 24);
 427         }
 428
 429         DCPOMATIC_ASSERT (audio);
 430
 431         Frame longest = 0;
 432         BOOST_FOREACH (AudioStreamPtr i, audio->streams ()) {
 433                 longest = max (longest, Frame(llrint(i->length())));
 434         }
 435
 436         return DCPTime::from_frames (longest, 24);
 437 }
 438
 439 void
 440 FFmpegContent::set_filters (vector<Filter const *> const & filters)
 441 {
 442         ChangeSignaller<Content> cc (this, FFmpegContentProperty::FILTERS);
 443
 444         {
 445                 boost::mutex::scoped_lock lm (_mutex);
 446                 _filters = filters;
 447         }
 448 }
 449
 450 string
 451 FFmpegContent::identifier () const
 452 {
 453         string s = Content::identifier();
 454
 455         if (video) {
 456                 s += "_" + video->identifier();
 457         }
 458
 459         if (only_text() && only_text()->use() && only_text()->burn()) {
 460                 s += "_" + only_text()->identifier();
 461         }
 462
 463         boost::mutex::scoped_lock lm (_mutex);
 464
 465         if (_subtitle_stream) {
 466                 s += "_" + _subtitle_stream->identifier ();
 467         }
 468
 469         for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
 470                 s += "_" + (*i)->id ();
 471         }
 472
 473         return s;
 474 }
 475
 476 void
 477 FFmpegContent::set_default_colour_conversion ()
 478 {
 479         DCPOMATIC_ASSERT (video);
 480
 481         dcp::Size const s = video->size ();
 482
 483         boost::mutex::scoped_lock lm (_mutex);
 484
 485         switch (_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)) {
 486         case AVCOL_SPC_RGB:
 487                 video->set_colour_conversion (PresetColourConversion::from_id ("srgb").conversion);
 488                 break;
 489         case AVCOL_SPC_BT709:
 490                 video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 491                 break;
 492         case AVCOL_SPC_BT470BG:
 493         case AVCOL_SPC_SMPTE170M:
 494         case AVCOL_SPC_SMPTE240M:
 495                 video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 496                 break;
 497         case AVCOL_SPC_BT2020_CL:
 498         case AVCOL_SPC_BT2020_NCL:
 499                 video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion);
 500                 break;
 501         default:
 502                 if (s.width < 1080) {
 503                         video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 504                 } else {
 505                         video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 506                 }
 507                 break;
 508         }
 509 }
 510
 511 void
 512 FFmpegContent::add_properties (shared_ptr<const Film> film, list<UserProperty>& p) const
 513 {
 514         Content::add_properties (film, p);
 515
 516         if (video) {
 517                 video->add_properties (p);
 518
 519                 if (_bits_per_pixel) {
 520                         /* Assuming there's three components, so bits per pixel component is _bits_per_pixel / 3 */
 521                         int const lim_start = pow(2, _bits_per_pixel.get() / 3 - 4);
 522                         int const lim_end = 235 * pow(2, _bits_per_pixel.get() / 3 - 8);
 523                         int const total = pow(2, _bits_per_pixel.get() / 3);
 524
 525                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 526                         case AVCOL_RANGE_UNSPECIFIED:
 527                                 /// TRANSLATORS: this means that the range of pixel values used in this
 528                                 /// file is unknown (not specified in the file).
 529                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 530                                 break;
 531                         case AVCOL_RANGE_MPEG:
 532                                 /// TRANSLATORS: this means that the range of pixel values used in this
 533                                 /// file is limited, so that not all possible values are valid.
 534                                 p.push_back (
 535                                         UserProperty (
 536                                                 UserProperty::VIDEO, _("Colour range"), String::compose(_("Limited (%1-%2)"), lim_start, lim_end)
 537                                                 )
 538                                         );
 539                                 break;
 540                         case AVCOL_RANGE_JPEG:
 541                                 /// TRANSLATORS: this means that the range of pixel values used in this
 542                                 /// file is full, so that all possible pixel values are valid.
 543                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), String::compose (_("Full (0-%1)"), total)));
 544                                 break;
 545                         default:
 546                                 DCPOMATIC_ASSERT (false);
 547                         }
 548                 } else {
 549                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 550                         case AVCOL_RANGE_UNSPECIFIED:
 551                                 /// TRANSLATORS: this means that the range of pixel values used in this
 552                                 /// file is unknown (not specified in the file).
 553                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 554                                 break;
 555                         case AVCOL_RANGE_MPEG:
 556                                 /// TRANSLATORS: this means that the range of pixel values used in this
 557                                 /// file is limited, so that not all possible values are valid.
 558                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Limited")));
 559                                 break;
 560                         case AVCOL_RANGE_JPEG:
 561                                 /// TRANSLATORS: this means that the range of pixel values used in this
 562                                 /// file is full, so that all possible pixel values are valid.
 563                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Full")));
 564                                 break;
 565                         default:
 566                                 DCPOMATIC_ASSERT (false);
 567                         }
 568                 }
 569
 570                 char const * primaries[] = {
 571                         _("Unspecified"),
 572                         _("BT709"),
 573                         _("Unspecified"),
 574                         _("Unspecified"),
 575                         _("BT470M"),
 576                         _("BT470BG"),
 577                         _("SMPTE 170M (BT601)"),
 578                         _("SMPTE 240M"),
 579                         _("Film"),
 580                         _("BT2020"),
 581                         _("SMPTE ST 428-1 (CIE 1931 XYZ)"),
 582                         _("SMPTE ST 431-2 (2011)"),
 583                         _("SMPTE ST 432-1 D65 (2010)"), // 12
 584                         "", // 13
 585                         "", // 14
 586                         "", // 15
 587                         "", // 16
 588                         "", // 17
 589                         "", // 18
 590                         "", // 19
 591                         "", // 20
 592                         "", // 21
 593                         _("JEDEC P22")
 594                 };
 595
 596                 DCPOMATIC_ASSERT (AVCOL_PRI_NB <= 23);
 597                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour primaries"), primaries[_color_primaries.get_value_or(AVCOL_PRI_UNSPECIFIED)]));
 598
 599                 char const * transfers[] = {
 600                         _("Unspecified"),
 601                         _("BT709"),
 602                         _("Unspecified"),
 603                         _("Unspecified"),
 604                         _("Gamma 22 (BT470M)"),
 605                         _("Gamma 28 (BT470BG)"),
 606                         _("SMPTE 170M (BT601)"),
 607                         _("SMPTE 240M"),
 608                         _("Linear"),
 609                         _("Logarithmic (100:1 range)"),
 610                         _("Logarithmic (316:1 range)"),
 611                         _("IEC61966-2-4"),
 612                         _("BT1361 extended colour gamut"),
 613                         _("IEC61966-2-1 (sRGB or sYCC)"),
 614                         _("BT2020 for a 10-bit system"),
 615                         _("BT2020 for a 12-bit system"),
 616                         _("SMPTE ST 2084 for 10, 12, 14 and 16 bit systems"),
 617                         _("SMPTE ST 428-1"),
 618                         _("ARIB STD-B67 ('Hybrid log-gamma')")
 619                 };
 620
 621                 DCPOMATIC_ASSERT (AVCOL_TRC_NB <= 19);
 622                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour transfer characteristic"), transfers[_color_trc.get_value_or(AVCOL_TRC_UNSPECIFIED)]));
 623
 624                 char const * spaces[] = {
 625                         _("RGB / sRGB (IEC61966-2-1)"),
 626                         _("BT709"),
 627                         _("Unspecified"),
 628                         _("Unspecified"),
 629                         _("FCC"),
 630                         _("BT470BG (BT601-6)"),
 631                         _("SMPTE 170M (BT601-6)"),
 632                         _("SMPTE 240M"),
 633                         _("YCOCG"),
 634                         _("BT2020 non-constant luminance"),
 635                         _("BT2020 constant luminance"),
 636                         _("SMPTE 2085, Y'D'zD'x"),
 637                         _("Chroma-derived non-constant luminance"),
 638                         _("Chroma-derived constant luminance"),
 639                         _("BT2100")
 640                 };
 641
 642                 DCPOMATIC_ASSERT (AVCOL_SPC_NB == 15);
 643                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colourspace"), spaces[_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)]));
 644
 645                 if (_bits_per_pixel) {
 646                         p.push_back (UserProperty (UserProperty::VIDEO, _("Bits per pixel"), *_bits_per_pixel));
 647                 }
 648         }
 649
 650         if (audio) {
 651                 audio->add_properties (film, p);
 652         }
 653 }
 654
 655 /** Our subtitle streams have colour maps, which can be changed, but
 656  *  they have no way of signalling that change.  As a hack, we have this
 657  *  method which callers can use when they've modified one of our subtitle
 658  *  streams.
 659  */
 660 void
 661 FFmpegContent::signal_subtitle_stream_changed ()
 662 {
 663         /* XXX: this is too late; really it should be before the change */
 664         ChangeSignaller<Content> cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 665 }
 666
 667 vector<shared_ptr<FFmpegAudioStream> >
 668 FFmpegContent::ffmpeg_audio_streams () const
 669 {
 670         vector<shared_ptr<FFmpegAudioStream> > fa;
 671
 672         if (audio) {
 673                 BOOST_FOREACH (AudioStreamPtr i, audio->streams()) {
 674                         fa.push_back (dynamic_pointer_cast<FFmpegAudioStream> (i));
 675                 }
 676         }
 677
 678         return fa;
 679 }
 680
 681 void
 682 FFmpegContent::take_settings_from (shared_ptr<const Content> c)
 683 {
 684         shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (c);
 685         if (!fc) {
 686                 return;
 687                 }
 688
 689         Content::take_settings_from (c);
 690         _filters = fc->_filters;
 691 }
 692