src/lib/ffmpeg_content.cc

   1 /*
   2     Copyright (C) 2013-2016 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 "exceptions.h"
  34 #include "frame_rate_change.h"
  35 #include "text_content.h"
  36 #include <dcp/raw_convert.h>
  37 #include <libcxml/cxml.h>
  38 extern "C" {
  39 #include <libavformat/avformat.h>
  40 #include <libavutil/pixdesc.h>
  41 }
  42 #include <libxml++/libxml++.h>
  43 #include <boost/foreach.hpp>
  44 #include <iostream>
  45
  46 #include "i18n.h"
  47
  48 #define LOG_GENERAL(...) film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
  49
  50 using std::string;
  51 using std::vector;
  52 using std::list;
  53 using std::cout;
  54 using std::pair;
  55 using std::make_pair;
  56 using std::max;
  57 using boost::shared_ptr;
  58 using boost::dynamic_pointer_cast;
  59 using boost::optional;
  60 using dcp::raw_convert;
  61
  62 int const FFmpegContentProperty::SUBTITLE_STREAMS = 100;
  63 int const FFmpegContentProperty::SUBTITLE_STREAM = 101;
  64 int const FFmpegContentProperty::FILTERS = 102;
  65
  66 FFmpegContent::FFmpegContent (shared_ptr<const Film> film, boost::filesystem::path p)
  67         : Content (film, p)
  68         , _encrypted (false)
  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 (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, list<string>& notes)
  85         : Content (film, 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         _decryption_key = node->optional_string_child ("DecryptionKey");
 130         _encrypted = node->optional_bool_child("Encrypted").get_value_or(false);
 131 }
 132
 133 FFmpegContent::FFmpegContent (shared_ptr<const Film> film, vector<shared_ptr<Content> > c)
 134         : Content (film, c)
 135 {
 136         vector<shared_ptr<Content> >::const_iterator i = c.begin ();
 137
 138         bool need_video = false;
 139         bool need_audio = false;
 140         bool need_text = false;
 141
 142         if (i != c.end ()) {
 143                 need_video = static_cast<bool> ((*i)->video);
 144                 need_audio = static_cast<bool> ((*i)->audio);
 145                 need_text = !(*i)->text.empty();
 146         }
 147
 148         while (i != c.end ()) {
 149                 if (need_video != static_cast<bool> ((*i)->video)) {
 150                         throw JoinError (_("Content to be joined must all have or not have video"));
 151                 }
 152                 if (need_audio != static_cast<bool> ((*i)->audio)) {
 153                         throw JoinError (_("Content to be joined must all have or not have audio"));
 154                 }
 155                 if (need_text != !(*i)->text.empty()) {
 156                         throw JoinError (_("Content to be joined must all have or not have subtitles or captions"));
 157                 }
 158                 ++i;
 159         }
 160
 161         if (need_video) {
 162                 video.reset (new VideoContent (this, c));
 163         }
 164         if (need_audio) {
 165                 audio.reset (new AudioContent (this, c));
 166         }
 167         if (need_text) {
 168                 text.push_back (shared_ptr<TextContent> (new TextContent (this, c)));
 169         }
 170
 171         shared_ptr<FFmpegContent> ref = dynamic_pointer_cast<FFmpegContent> (c[0]);
 172         DCPOMATIC_ASSERT (ref);
 173
 174         for (size_t i = 0; i < c.size(); ++i) {
 175                 shared_ptr<FFmpegContent> fc = dynamic_pointer_cast<FFmpegContent> (c[i]);
 176                 if (fc->only_text() && fc->only_text()->use() && *(fc->_subtitle_stream.get()) != *(ref->_subtitle_stream.get())) {
 177                         throw JoinError (_("Content to be joined must use the same subtitle stream."));
 178                 }
 179         }
 180
 181         /* XXX: should probably check that more of the stuff below is the same in *this and ref */
 182
 183         _subtitle_streams = ref->subtitle_streams ();
 184         _subtitle_stream = ref->subtitle_stream ();
 185         _first_video = ref->_first_video;
 186         _filters = ref->_filters;
 187         _color_range = ref->_color_range;
 188         _color_primaries = ref->_color_primaries;
 189         _color_trc = ref->_color_trc;
 190         _colorspace = ref->_colorspace;
 191         _bits_per_pixel = ref->_bits_per_pixel;
 192         _encrypted = ref->_encrypted;
 193 }
 194
 195 void
 196 FFmpegContent::as_xml (xmlpp::Node* node, bool with_paths) const
 197 {
 198         node->add_child("Type")->add_child_text ("FFmpeg");
 199         Content::as_xml (node, with_paths);
 200
 201         if (video) {
 202                 video->as_xml (node);
 203         }
 204
 205         if (audio) {
 206                 audio->as_xml (node);
 207
 208                 BOOST_FOREACH (AudioStreamPtr i, audio->streams ()) {
 209                         shared_ptr<FFmpegAudioStream> f = dynamic_pointer_cast<FFmpegAudioStream> (i);
 210                         DCPOMATIC_ASSERT (f);
 211                         f->as_xml (node->add_child("AudioStream"));
 212                 }
 213         }
 214
 215         if (only_text()) {
 216                 only_text()->as_xml (node);
 217         }
 218
 219         boost::mutex::scoped_lock lm (_mutex);
 220
 221         for (vector<shared_ptr<FFmpegSubtitleStream> >::const_iterator i = _subtitle_streams.begin(); i != _subtitle_streams.end(); ++i) {
 222                 xmlpp::Node* t = node->add_child("SubtitleStream");
 223                 if (_subtitle_stream && *i == _subtitle_stream) {
 224                         t->add_child("Selected")->add_child_text("1");
 225                 }
 226                 (*i)->as_xml (t);
 227         }
 228
 229         for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
 230                 node->add_child("Filter")->add_child_text ((*i)->id ());
 231         }
 232
 233         if (_first_video) {
 234                 node->add_child("FirstVideo")->add_child_text (raw_convert<string> (_first_video.get().get()));
 235         }
 236
 237         if (_color_range) {
 238                 node->add_child("ColorRange")->add_child_text (raw_convert<string> (static_cast<int> (*_color_range)));
 239         }
 240         if (_color_primaries) {
 241                 node->add_child("ColorPrimaries")->add_child_text (raw_convert<string> (static_cast<int> (*_color_primaries)));
 242         }
 243         if (_color_trc) {
 244                 node->add_child("ColorTransferCharacteristic")->add_child_text (raw_convert<string> (static_cast<int> (*_color_trc)));
 245         }
 246         if (_colorspace) {
 247                 node->add_child("Colorspace")->add_child_text (raw_convert<string> (static_cast<int> (*_colorspace)));
 248         }
 249         if (_bits_per_pixel) {
 250                 node->add_child("BitsPerPixel")->add_child_text (raw_convert<string> (*_bits_per_pixel));
 251         }
 252         if (_decryption_key) {
 253                 node->add_child("DecryptionKey")->add_child_text (_decryption_key.get());
 254         }
 255         if (_encrypted) {
 256                 node->add_child("Encypted")->add_child_text ("1");
 257         }
 258 }
 259
 260 void
 261 FFmpegContent::examine (shared_ptr<Job> job)
 262 {
 263         ChangeSignaller<Content> cc1 (this, FFmpegContentProperty::SUBTITLE_STREAMS);
 264         ChangeSignaller<Content> cc2 (this, FFmpegContentProperty::SUBTITLE_STREAM);
 265
 266         job->set_progress_unknown ();
 267
 268         Content::examine (job);
 269
 270         shared_ptr<FFmpegExaminer> examiner (new FFmpegExaminer (shared_from_this (), job));
 271
 272         if (examiner->has_video ()) {
 273                 video.reset (new VideoContent (this));
 274                 video->take_from_examiner (examiner);
 275         }
 276
 277         boost::filesystem::path first_path = path (0);
 278
 279         {
 280                 boost::mutex::scoped_lock lm (_mutex);
 281
 282                 if (examiner->has_video ()) {
 283                         _first_video = examiner->first_video ();
 284                         _color_range = examiner->color_range ();
 285                         _color_primaries = examiner->color_primaries ();
 286                         _color_trc = examiner->color_trc ();
 287                         _colorspace = examiner->colorspace ();
 288                         _bits_per_pixel = examiner->bits_per_pixel ();
 289
 290                         if (examiner->rotation()) {
 291                                 double rot = *examiner->rotation ();
 292                                 if (fabs (rot - 180) < 1.0) {
 293                                         _filters.push_back (Filter::from_id ("vflip"));
 294                                         _filters.push_back (Filter::from_id ("hflip"));
 295                                 } else if (fabs (rot - 90) < 1.0) {
 296                                         _filters.push_back (Filter::from_id ("90clock"));
 297                                 } else if (fabs (rot - 270) < 1.0) {
 298                                         _filters.push_back (Filter::from_id ("90anticlock"));
 299                                 }
 300                         }
 301                 }
 302
 303                 if (!examiner->audio_streams().empty ()) {
 304                         audio.reset (new AudioContent (this));
 305
 306                         BOOST_FOREACH (shared_ptr<FFmpegAudioStream> i, examiner->audio_streams ()) {
 307                                 audio->add_stream (i);
 308                         }
 309
 310                         AudioStreamPtr as = audio->streams().front();
 311                         AudioMapping m = as->mapping ();
 312                         film()->make_audio_mapping_default (m, first_path);
 313                         as->set_mapping (m);
 314                 }
 315
 316                 _subtitle_streams = examiner->subtitle_streams ();
 317                 if (!_subtitle_streams.empty ()) {
 318                         text.clear ();
 319                         text.push_back (shared_ptr<TextContent> (new TextContent (this, TEXT_OPEN_SUBTITLE, TEXT_UNKNOWN)));
 320                         _subtitle_stream = _subtitle_streams.front ();
 321                 }
 322
 323                 _encrypted = first_path.extension() == ".ecinema";
 324         }
 325
 326         if (examiner->has_video ()) {
 327                 set_default_colour_conversion ();
 328         }
 329 }
 330
 331 string
 332 FFmpegContent::summary () const
 333 {
 334         if (video && audio) {
 335                 return String::compose (_("%1 [movie]"), path_summary ());
 336         } else if (video) {
 337                 return String::compose (_("%1 [video]"), path_summary ());
 338         } else if (audio) {
 339                 return String::compose (_("%1 [audio]"), path_summary ());
 340         }
 341
 342         return path_summary ();
 343 }
 344
 345 string
 346 FFmpegContent::technical_summary () const
 347 {
 348         string as = "";
 349         BOOST_FOREACH (shared_ptr<FFmpegAudioStream> i, ffmpeg_audio_streams ()) {
 350                 as += i->technical_summary () + " " ;
 351         }
 352
 353         if (as.empty ()) {
 354                 as = "none";
 355         }
 356
 357         string ss = "none";
 358         if (_subtitle_stream) {
 359                 ss = _subtitle_stream->technical_summary ();
 360         }
 361
 362         string filt = Filter::ffmpeg_string (_filters);
 363
 364         string s = Content::technical_summary ();
 365
 366         if (video) {
 367                 s += " - " + video->technical_summary ();
 368         }
 369
 370         if (audio) {
 371                 s += " - " + audio->technical_summary ();
 372         }
 373
 374         return s + String::compose (
 375                 "ffmpeg: audio %1 subtitle %2 filters %3", as, ss, filt
 376                 );
 377 }
 378
 379 void
 380 FFmpegContent::set_subtitle_stream (shared_ptr<FFmpegSubtitleStream> s)
 381 {
 382         ChangeSignaller<Content> cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 383
 384         {
 385                 boost::mutex::scoped_lock lm (_mutex);
 386                 _subtitle_stream = s;
 387         }
 388 }
 389
 390 bool
 391 operator== (FFmpegStream const & a, FFmpegStream const & b)
 392 {
 393         return a._id == b._id;
 394 }
 395
 396 bool
 397 operator!= (FFmpegStream const & a, FFmpegStream const & b)
 398 {
 399         return a._id != b._id;
 400 }
 401
 402 DCPTime
 403 FFmpegContent::full_length () const
 404 {
 405         FrameRateChange const frc (active_video_frame_rate (), film()->video_frame_rate ());
 406         if (video) {
 407                 return DCPTime::from_frames (llrint (video->length_after_3d_combine() * frc.factor()), film()->video_frame_rate());
 408         }
 409
 410         DCPOMATIC_ASSERT (audio);
 411
 412         DCPTime longest;
 413         BOOST_FOREACH (AudioStreamPtr i, audio->streams ()) {
 414                 longest = max (longest, DCPTime::from_frames (llrint (i->length() / frc.speed_up), i->frame_rate()));
 415         }
 416
 417         return longest;
 418 }
 419
 420 void
 421 FFmpegContent::set_filters (vector<Filter const *> const & filters)
 422 {
 423         ChangeSignaller<Content> cc (this, FFmpegContentProperty::FILTERS);
 424
 425         {
 426                 boost::mutex::scoped_lock lm (_mutex);
 427                 _filters = filters;
 428         }
 429 }
 430
 431 string
 432 FFmpegContent::identifier () const
 433 {
 434         string s = Content::identifier();
 435
 436         if (video) {
 437                 s += "_" + video->identifier();
 438         }
 439
 440         if (only_text() && only_text()->use() && only_text()->burn()) {
 441                 s += "_" + only_text()->identifier();
 442         }
 443
 444         boost::mutex::scoped_lock lm (_mutex);
 445
 446         if (_subtitle_stream) {
 447                 s += "_" + _subtitle_stream->identifier ();
 448         }
 449
 450         for (vector<Filter const *>::const_iterator i = _filters.begin(); i != _filters.end(); ++i) {
 451                 s += "_" + (*i)->id ();
 452         }
 453
 454         return s;
 455 }
 456
 457 void
 458 FFmpegContent::set_default_colour_conversion ()
 459 {
 460         DCPOMATIC_ASSERT (video);
 461
 462         dcp::Size const s = video->size ();
 463
 464         boost::mutex::scoped_lock lm (_mutex);
 465
 466         switch (_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)) {
 467         case AVCOL_SPC_RGB:
 468                 video->set_colour_conversion (PresetColourConversion::from_id ("srgb").conversion);
 469                 break;
 470         case AVCOL_SPC_BT709:
 471                 video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 472                 break;
 473         case AVCOL_SPC_BT470BG:
 474         case AVCOL_SPC_SMPTE170M:
 475         case AVCOL_SPC_SMPTE240M:
 476                 video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 477                 break;
 478         case AVCOL_SPC_BT2020_CL:
 479         case AVCOL_SPC_BT2020_NCL:
 480                 video->set_colour_conversion (PresetColourConversion::from_id ("rec2020").conversion);
 481                 break;
 482         default:
 483                 if (s.width < 1080) {
 484                         video->set_colour_conversion (PresetColourConversion::from_id ("rec601").conversion);
 485                 } else {
 486                         video->set_colour_conversion (PresetColourConversion::from_id ("rec709").conversion);
 487                 }
 488                 break;
 489         }
 490 }
 491
 492 void
 493 FFmpegContent::add_properties (list<UserProperty>& p) const
 494 {
 495         Content::add_properties (p);
 496
 497         if (video) {
 498                 video->add_properties (p);
 499
 500                 if (_bits_per_pixel) {
 501                         int const sub = 219 * pow (2, _bits_per_pixel.get() - 8);
 502                         int const total = pow (2, _bits_per_pixel.get());
 503
 504                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 505                         case AVCOL_RANGE_UNSPECIFIED:
 506                                 /// TRANSLATORS: this means that the range of pixel values used in this
 507                                 /// file is unknown (not specified in the file).
 508                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 509                                 break;
 510                         case AVCOL_RANGE_MPEG:
 511                                 /// TRANSLATORS: this means that the range of pixel values used in this
 512                                 /// file is limited, so that not all possible values are valid.
 513                                 p.push_back (
 514                                         UserProperty (
 515                                                 UserProperty::VIDEO, _("Colour range"), String::compose (_("Limited (%1-%2)"), (total - sub) / 2, (total + sub) / 2)
 516                                                 )
 517                                         );
 518                                 break;
 519                         case AVCOL_RANGE_JPEG:
 520                                 /// TRANSLATORS: this means that the range of pixel values used in this
 521                                 /// file is full, so that all possible pixel values are valid.
 522                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), String::compose (_("Full (0-%1)"), total)));
 523                                 break;
 524                         default:
 525                                 DCPOMATIC_ASSERT (false);
 526                         }
 527                 } else {
 528                         switch (_color_range.get_value_or(AVCOL_RANGE_UNSPECIFIED)) {
 529                         case AVCOL_RANGE_UNSPECIFIED:
 530                                 /// TRANSLATORS: this means that the range of pixel values used in this
 531                                 /// file is unknown (not specified in the file).
 532                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Unspecified")));
 533                                 break;
 534                         case AVCOL_RANGE_MPEG:
 535                                 /// TRANSLATORS: this means that the range of pixel values used in this
 536                                 /// file is limited, so that not all possible values are valid.
 537                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Limited")));
 538                                 break;
 539                         case AVCOL_RANGE_JPEG:
 540                                 /// TRANSLATORS: this means that the range of pixel values used in this
 541                                 /// file is full, so that all possible pixel values are valid.
 542                                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour range"), _("Full")));
 543                                 break;
 544                         default:
 545                                 DCPOMATIC_ASSERT (false);
 546                         }
 547                 }
 548
 549                 char const * primaries[] = {
 550                         _("Unspecified"),
 551                         _("BT709"),
 552                         _("Unspecified"),
 553                         _("Unspecified"),
 554                         _("BT470M"),
 555                         _("BT470BG"),
 556                         _("SMPTE 170M (BT601)"),
 557                         _("SMPTE 240M"),
 558                         _("Film"),
 559                         _("BT2020"),
 560                         _("SMPTE ST 428-1 (CIE 1931 XYZ)"),
 561                         _("SMPTE ST 431-2 (2011)"),
 562                         _("SMPTE ST 432-1 D65 (2010)"), // 12
 563                         "", // 13
 564                         "", // 14
 565                         "", // 15
 566                         "", // 16
 567                         "", // 17
 568                         "", // 18
 569                         "", // 19
 570                         "", // 20
 571                         "", // 21
 572                         _("JEDEC P22")
 573                 };
 574
 575                 DCPOMATIC_ASSERT (AVCOL_PRI_NB <= 23);
 576                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour primaries"), primaries[_color_primaries.get_value_or(AVCOL_PRI_UNSPECIFIED)]));
 577
 578                 char const * transfers[] = {
 579                         _("Unspecified"),
 580                         _("BT709"),
 581                         _("Unspecified"),
 582                         _("Unspecified"),
 583                         _("Gamma 22 (BT470M)"),
 584                         _("Gamma 28 (BT470BG)"),
 585                         _("SMPTE 170M (BT601)"),
 586                         _("SMPTE 240M"),
 587                         _("Linear"),
 588                         _("Logarithmic (100:1 range)"),
 589                         _("Logarithmic (316:1 range)"),
 590                         _("IEC61966-2-4"),
 591                         _("BT1361 extended colour gamut"),
 592                         _("IEC61966-2-1 (sRGB or sYCC)"),
 593                         _("BT2020 for a 10-bit system"),
 594                         _("BT2020 for a 12-bit system"),
 595                         _("SMPTE ST 2084 for 10, 12, 14 and 16 bit systems"),
 596                         _("SMPTE ST 428-1"),
 597                         _("ARIB STD-B67 ('Hybrid log-gamma')")
 598                 };
 599
 600                 DCPOMATIC_ASSERT (AVCOL_TRC_NB <= 19);
 601                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colour transfer characteristic"), transfers[_color_trc.get_value_or(AVCOL_TRC_UNSPECIFIED)]));
 602
 603                 char const * spaces[] = {
 604                         _("RGB / sRGB (IEC61966-2-1)"),
 605                         _("BT709"),
 606                         _("Unspecified"),
 607                         _("Unspecified"),
 608                         _("FCC"),
 609                         _("BT470BG (BT601-6)"),
 610                         _("SMPTE 170M (BT601-6)"),
 611                         _("SMPTE 240M"),
 612                         _("YCOCG"),
 613                         _("BT2020 non-constant luminance"),
 614                         _("BT2020 constant luminance"),
 615                         _("SMPTE 2085, Y'D'zD'x"),
 616                         _("Chroma-derived non-constant luminance"),
 617                         _("Chroma-derived constant luminance"),
 618                         _("BT2100")
 619                 };
 620
 621                 DCPOMATIC_ASSERT (AVCOL_SPC_NB == 15);
 622                 p.push_back (UserProperty (UserProperty::VIDEO, _("Colourspace"), spaces[_colorspace.get_value_or(AVCOL_SPC_UNSPECIFIED)]));
 623
 624                 if (_bits_per_pixel) {
 625                         p.push_back (UserProperty (UserProperty::VIDEO, _("Bits per pixel"), *_bits_per_pixel));
 626                 }
 627         }
 628
 629         if (audio) {
 630                 audio->add_properties (p);
 631         }
 632 }
 633
 634 /** Our subtitle streams have colour maps, which can be changed, but
 635  *  they have no way of signalling that change.  As a hack, we have this
 636  *  method which callers can use when they've modified one of our subtitle
 637  *  streams.
 638  */
 639 void
 640 FFmpegContent::signal_subtitle_stream_changed ()
 641 {
 642         /* XXX: this is too late; really it should be before the change */
 643         ChangeSignaller<Content> cc (this, FFmpegContentProperty::SUBTITLE_STREAM);
 644 }
 645
 646 vector<shared_ptr<FFmpegAudioStream> >
 647 FFmpegContent::ffmpeg_audio_streams () const
 648 {
 649         vector<shared_ptr<FFmpegAudioStream> > fa;
 650
 651         if (audio) {
 652                 BOOST_FOREACH (AudioStreamPtr i, audio->streams()) {
 653                         fa.push_back (dynamic_pointer_cast<FFmpegAudioStream> (i));
 654                 }
 655         }
 656
 657         return fa;
 658 }
 659
 660 void
 661 FFmpegContent::take_settings_from (shared_ptr<const Content> c)
 662 {
 663         shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<const FFmpegContent> (c);
 664         if (!fc) {
 665                 return;
 666                 }
 667
 668         Content::take_settings_from (c);
 669         _filters = fc->_filters;
 670 }