src/lib/reel_writer.cc

   1 /*
   2     Copyright (C) 2012-2018 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 "reel_writer.h"
  22 #include "film.h"
  23 #include "cross.h"
  24 #include "job.h"
  25 #include "log.h"
  26 #include "dcpomatic_log.h"
  27 #include "digester.h"
  28 #include "font.h"
  29 #include "compose.hpp"
  30 #include "audio_buffers.h"
  31 #include "image.h"
  32 #include <dcp/mono_picture_asset.h>
  33 #include <dcp/stereo_picture_asset.h>
  34 #include <dcp/sound_asset.h>
  35 #include <dcp/sound_asset_writer.h>
  36 #include <dcp/reel.h>
  37 #include <dcp/reel_mono_picture_asset.h>
  38 #include <dcp/reel_stereo_picture_asset.h>
  39 #include <dcp/reel_sound_asset.h>
  40 #include <dcp/reel_subtitle_asset.h>
  41 #include <dcp/reel_closed_caption_asset.h>
  42 #include <dcp/reel_markers_asset.h>
  43 #include <dcp/dcp.h>
  44 #include <dcp/cpl.h>
  45 #include <dcp/certificate_chain.h>
  46 #include <dcp/interop_subtitle_asset.h>
  47 #include <dcp/smpte_subtitle_asset.h>
  48 #include <dcp/raw_convert.h>
  49 #include <dcp/subtitle_image.h>
  50 #include <boost/foreach.hpp>
  51
  52 #include "i18n.h"
  53
  54 using std::list;
  55 using std::string;
  56 using std::cout;
  57 using std::map;
  58 using boost::shared_ptr;
  59 using boost::optional;
  60 using boost::dynamic_pointer_cast;
  61 using dcp::Data;
  62 using dcp::raw_convert;
  63 using namespace dcpomatic;
  64
  65 int const ReelWriter::_info_size = 48;
  66
  67 ReelWriter::ReelWriter (
  68         shared_ptr<const Film> film, DCPTimePeriod period, shared_ptr<Job> job, int reel_index, int reel_count, optional<string> content_summary
  69         )
  70         : _film (film)
  71         , _period (period)
  72         , _last_written_video_frame (-1)
  73         , _last_written_eyes (EYES_RIGHT)
  74         , _reel_index (reel_index)
  75         , _reel_count (reel_count)
  76         , _content_summary (content_summary)
  77 {
  78         /* Create our picture asset in a subdirectory, named according to those
  79            film's parameters which affect the video output.  We will hard-link
  80            it into the DCP later.
  81         */
  82
  83         dcp::Standard const standard = _film->interop() ? dcp::INTEROP : dcp::SMPTE;
  84
  85         if (_film->three_d ()) {
  86                 _picture_asset.reset (new dcp::StereoPictureAsset (dcp::Fraction (_film->video_frame_rate(), 1), standard));
  87         } else {
  88                 _picture_asset.reset (new dcp::MonoPictureAsset (dcp::Fraction (_film->video_frame_rate(), 1), standard));
  89         }
  90
  91         _picture_asset->set_size (_film->frame_size ());
  92
  93         if (_film->encrypted ()) {
  94                 _picture_asset->set_key (_film->key ());
  95                 _picture_asset->set_context_id (_film->context_id ());
  96         }
  97
  98         _picture_asset->set_file (
  99                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period)
 100                 );
 101
 102         job->sub (_("Checking existing image data"));
 103         _first_nonexistant_frame = check_existing_picture_asset ();
 104
 105         _picture_asset_writer = _picture_asset->start_write (
 106                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period),
 107                 _first_nonexistant_frame > 0
 108                 );
 109
 110         if (_film->audio_channels ()) {
 111                 _sound_asset.reset (
 112                         new dcp::SoundAsset (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels (), standard)
 113                         );
 114
 115                 if (_film->encrypted ()) {
 116                         _sound_asset->set_key (_film->key ());
 117                 }
 118
 119                 DCPOMATIC_ASSERT (_film->directory());
 120
 121                 /* Write the sound asset into the film directory so that we leave the creation
 122                    of the DCP directory until the last minute.
 123                 */
 124                 _sound_asset_writer = _sound_asset->start_write (
 125                         _film->directory().get() / audio_asset_filename (_sound_asset, _reel_index, _reel_count, _content_summary)
 126                         );
 127         }
 128 }
 129
 130 /** @param frame reel-relative frame */
 131 void
 132 ReelWriter::write_frame_info (Frame frame, Eyes eyes, dcp::FrameInfo info) const
 133 {
 134         FILE* file = 0;
 135         boost::filesystem::path info_file = _film->info_file (_period);
 136
 137         bool const read = boost::filesystem::exists (info_file);
 138
 139         if (read) {
 140                 file = fopen_boost (info_file, "r+b");
 141         } else {
 142                 file = fopen_boost (info_file, "wb");
 143         }
 144         if (!file) {
 145                 throw OpenFileError (info_file, errno, read);
 146         }
 147         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 148         checked_fwrite (&info.offset, sizeof (info.offset), file, info_file);
 149         checked_fwrite (&info.size, sizeof (info.size), file, info_file);
 150         checked_fwrite (info.hash.c_str(), info.hash.size(), file, info_file);
 151         fclose (file);
 152 }
 153
 154 dcp::FrameInfo
 155 ReelWriter::read_frame_info (FILE* file, Frame frame, Eyes eyes) const
 156 {
 157         dcp::FrameInfo info;
 158         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 159         checked_fread (&info.offset, sizeof(info.offset), file, _film->info_file(_period));
 160         checked_fread (&info.size, sizeof(info.size), file, _film->info_file(_period));
 161
 162         char hash_buffer[33];
 163         checked_fread (hash_buffer, 32, file, _film->info_file(_period));
 164         hash_buffer[32] = '\0';
 165         info.hash = hash_buffer;
 166
 167         return info;
 168 }
 169
 170 long
 171 ReelWriter::frame_info_position (Frame frame, Eyes eyes) const
 172 {
 173         switch (eyes) {
 174         case EYES_BOTH:
 175                 return frame * _info_size;
 176         case EYES_LEFT:
 177                 return frame * _info_size * 2;
 178         case EYES_RIGHT:
 179                 return frame * _info_size * 2 + _info_size;
 180         default:
 181                 DCPOMATIC_ASSERT (false);
 182         }
 183
 184         DCPOMATIC_ASSERT (false);
 185 }
 186
 187 Frame
 188 ReelWriter::check_existing_picture_asset ()
 189 {
 190         DCPOMATIC_ASSERT (_picture_asset->file());
 191         boost::filesystem::path asset = _picture_asset->file().get();
 192
 193         /* If there is an existing asset, break any hard links to it as we are about to change its contents
 194            (if only by changing the IDs); see #1126.
 195         */
 196
 197         if (boost::filesystem::exists(asset) && boost::filesystem::hard_link_count(asset) > 1) {
 198                 boost::filesystem::copy_file (asset, asset.string() + ".tmp");
 199                 boost::filesystem::remove (asset);
 200                 boost::filesystem::rename (asset.string() + ".tmp", asset);
 201         }
 202
 203         /* Try to open the existing asset */
 204         FILE* asset_file = fopen_boost (asset, "rb");
 205         if (!asset_file) {
 206                 LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", asset.string(), errno);
 207                 return 0;
 208         } else {
 209                 LOG_GENERAL ("Opened existing asset at %1", asset.string());
 210         }
 211
 212         /* Offset of the last dcp::FrameInfo in the info file */
 213         int const n = (boost::filesystem::file_size (_film->info_file(_period)) / _info_size) - 1;
 214         LOG_GENERAL ("The last FI is %1; info file is %2, info size %3", n, boost::filesystem::file_size (_film->info_file(_period)), _info_size);
 215
 216         FILE* info_file = fopen_boost (_film->info_file(_period), "rb");
 217         if (!info_file) {
 218                 LOG_GENERAL_NC ("Could not open film info file");
 219                 fclose (asset_file);
 220                 return 0;
 221         }
 222
 223         Frame first_nonexistant_frame;
 224         if (_film->three_d ()) {
 225                 /* Start looking at the last left frame */
 226                 first_nonexistant_frame = n / 2;
 227         } else {
 228                 first_nonexistant_frame = n;
 229         }
 230
 231         while (!existing_picture_frame_ok(asset_file, info_file, first_nonexistant_frame) && first_nonexistant_frame > 0) {
 232                 --first_nonexistant_frame;
 233         }
 234
 235         if (!_film->three_d() && first_nonexistant_frame > 0) {
 236                 /* If we are doing 3D we might have found a good L frame with no R, so only
 237                    do this if we're in 2D and we've just found a good B(oth) frame.
 238                 */
 239                 ++first_nonexistant_frame;
 240         }
 241
 242         LOG_GENERAL ("Proceeding with first nonexistant frame %1", first_nonexistant_frame);
 243
 244         fclose (asset_file);
 245         fclose (info_file);
 246
 247         return first_nonexistant_frame;
 248 }
 249
 250 void
 251 ReelWriter::write (optional<Data> encoded, Frame frame, Eyes eyes)
 252 {
 253         dcp::FrameInfo fin = _picture_asset_writer->write (encoded->data().get (), encoded->size());
 254         write_frame_info (frame, eyes, fin);
 255         _last_written[eyes] = encoded;
 256         _last_written_video_frame = frame;
 257         _last_written_eyes = eyes;
 258 }
 259
 260 void
 261 ReelWriter::fake_write (Frame frame, Eyes eyes, int size)
 262 {
 263         _picture_asset_writer->fake_write (size);
 264         _last_written_video_frame = frame;
 265         _last_written_eyes = eyes;
 266 }
 267
 268 void
 269 ReelWriter::repeat_write (Frame frame, Eyes eyes)
 270 {
 271         dcp::FrameInfo fin = _picture_asset_writer->write (
 272                 _last_written[eyes]->data().get(),
 273                 _last_written[eyes]->size()
 274                 );
 275         write_frame_info (frame, eyes, fin);
 276         _last_written_video_frame = frame;
 277         _last_written_eyes = eyes;
 278 }
 279
 280 void
 281 ReelWriter::finish ()
 282 {
 283         if (!_picture_asset_writer->finalize ()) {
 284                 /* Nothing was written to the picture asset */
 285                 LOG_GENERAL ("Nothing was written to reel %1 of %2", _reel_index, _reel_count);
 286                 _picture_asset.reset ();
 287         }
 288
 289         if (_sound_asset_writer && !_sound_asset_writer->finalize ()) {
 290                 /* Nothing was written to the sound asset */
 291                 _sound_asset.reset ();
 292         }
 293
 294         /* Hard-link any video asset file into the DCP */
 295         if (_picture_asset) {
 296                 DCPOMATIC_ASSERT (_picture_asset->file());
 297                 boost::filesystem::path video_from = _picture_asset->file().get();
 298                 boost::filesystem::path video_to;
 299                 video_to /= _film->dir (_film->dcp_name());
 300                 video_to /= video_asset_filename (_picture_asset, _reel_index, _reel_count, _content_summary);
 301
 302                 boost::system::error_code ec;
 303                 boost::filesystem::create_hard_link (video_from, video_to, ec);
 304                 if (ec) {
 305                         LOG_WARNING_NC ("Hard-link failed; copying instead");
 306                         boost::filesystem::copy_file (video_from, video_to, ec);
 307                         if (ec) {
 308                                 LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
 309                                 throw FileError (ec.message(), video_from);
 310                         }
 311                 }
 312
 313                 _picture_asset->set_file (video_to);
 314         }
 315
 316         /* Move the audio asset into the DCP */
 317         if (_sound_asset) {
 318                 boost::filesystem::path audio_to;
 319                 audio_to /= _film->dir (_film->dcp_name ());
 320                 string const aaf = audio_asset_filename (_sound_asset, _reel_index, _reel_count, _content_summary);
 321                 audio_to /= aaf;
 322
 323                 boost::system::error_code ec;
 324                 boost::filesystem::rename (_film->file (aaf), audio_to, ec);
 325                 if (ec) {
 326                         throw FileError (
 327                                 String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), aaf
 328                                 );
 329                 }
 330
 331                 _sound_asset->set_file (audio_to);
 332         }
 333 }
 334
 335 template <class T>
 336 shared_ptr<T>
 337 maybe_add_text (
 338         shared_ptr<dcp::SubtitleAsset> asset,
 339         int64_t picture_duration,
 340         shared_ptr<dcp::Reel> reel,
 341         list<ReferencedReelAsset> const & refs,
 342         list<shared_ptr<Font> > const & fonts,
 343         shared_ptr<const Film> film,
 344         DCPTimePeriod period
 345         )
 346 {
 347         Frame const period_duration = period.duration().frames_round(film->video_frame_rate());
 348
 349         shared_ptr<T> reel_asset;
 350
 351         if (asset) {
 352                 boost::filesystem::path liberation_normal;
 353                 try {
 354                         liberation_normal = shared_path() / "LiberationSans-Regular.ttf";
 355                         if (!boost::filesystem::exists (liberation_normal)) {
 356                                 /* Hack for unit tests */
 357                                 liberation_normal = shared_path() / "fonts" / "LiberationSans-Regular.ttf";
 358                         }
 359                 } catch (boost::filesystem::filesystem_error& e) {
 360
 361                 }
 362
 363                 if (!boost::filesystem::exists(liberation_normal)) {
 364                         liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
 365                 }
 366
 367                 /* Add the font to the subtitle content */
 368                 BOOST_FOREACH (shared_ptr<Font> j, fonts) {
 369                         asset->add_font (j->id(), j->file().get_value_or(liberation_normal));
 370                 }
 371
 372                 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (asset)) {
 373                         boost::filesystem::path directory = film->dir (film->dcp_name ()) / asset->id ();
 374                         boost::filesystem::create_directories (directory);
 375                         asset->write (directory / ("sub_" + asset->id() + ".xml"));
 376                 } else {
 377                         /* All our assets should be the same length; use the picture asset length here
 378                            as a reference to set the subtitle one.  We'll use the duration rather than
 379                            the intrinsic duration; we don't care if the picture asset has been trimmed, we're
 380                            just interested in its presentation length.
 381                         */
 382                         dynamic_pointer_cast<dcp::SMPTESubtitleAsset>(asset)->set_intrinsic_duration (picture_duration);
 383
 384                         asset->write (
 385                                 film->dir(film->dcp_name()) / ("sub_" + asset->id() + ".mxf")
 386                                 );
 387                 }
 388
 389                 reel_asset.reset (
 390                         new T (
 391                                 asset,
 392                                 dcp::Fraction (film->video_frame_rate(), 1),
 393                                 picture_duration,
 394                                 0
 395                                 )
 396                         );
 397         } else {
 398                 /* We don't have a subtitle asset of our own; hopefully we have one to reference */
 399                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
 400                         shared_ptr<T> k = dynamic_pointer_cast<T> (j.asset);
 401                         if (k && j.period == period) {
 402                                 reel_asset = k;
 403                                 /* If we have a hash for this asset in the CPL, assume that it is correct */
 404                                 if (k->hash()) {
 405                                         k->asset_ref()->set_hash (k->hash().get());
 406                                 }
 407                         }
 408                 }
 409         }
 410
 411         if (reel_asset) {
 412                 if (reel_asset->actual_duration() != period_duration) {
 413                         throw ProgrammingError (
 414                                 __FILE__, __LINE__,
 415                                 String::compose ("%1 vs %2", reel_asset->actual_duration(), period_duration)
 416                                 );
 417                 }
 418                 reel->add (reel_asset);
 419         }
 420
 421         return reel_asset;
 422 }
 423
 424 shared_ptr<dcp::Reel>
 425 ReelWriter::create_reel (list<ReferencedReelAsset> const & refs, list<shared_ptr<Font> > const & fonts)
 426 {
 427         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
 428
 429         shared_ptr<dcp::ReelPictureAsset> reel_picture_asset;
 430
 431         if (_picture_asset) {
 432                 /* We have made a picture asset of our own.  Put it into the reel */
 433                 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
 434                 if (mono) {
 435                         reel_picture_asset.reset (new dcp::ReelMonoPictureAsset (mono, 0));
 436                 }
 437
 438                 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
 439                 if (stereo) {
 440                         reel_picture_asset.reset (new dcp::ReelStereoPictureAsset (stereo, 0));
 441                 }
 442         } else {
 443                 LOG_GENERAL ("no picture asset of our own; look through %1", refs.size());
 444                 /* We don't have a picture asset of our own; hopefully we have one to reference */
 445                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
 446                         shared_ptr<dcp::ReelPictureAsset> k = dynamic_pointer_cast<dcp::ReelPictureAsset> (j.asset);
 447                         if (k) {
 448                                 LOG_GENERAL ("candidate picture asset period is %1-%2", j.period.from.get(), j.period.to.get());
 449                         }
 450                         if (k && j.period == _period) {
 451                                 reel_picture_asset = k;
 452                         }
 453                 }
 454         }
 455
 456         LOG_GENERAL ("create_reel for %1-%2; %3 of %4", _period.from.get(), _period.to.get(), _reel_index, _reel_count);
 457
 458         Frame const period_duration = _period.duration().frames_round(_film->video_frame_rate());
 459
 460         DCPOMATIC_ASSERT (reel_picture_asset);
 461         if (reel_picture_asset->duration() != period_duration) {
 462                 throw ProgrammingError (
 463                         __FILE__, __LINE__,
 464                         String::compose ("%1 vs %2", reel_picture_asset->actual_duration(), period_duration)
 465                         );
 466         }
 467         reel->add (reel_picture_asset);
 468
 469         /* If we have a hash for this asset in the CPL, assume that it is correct */
 470         if (reel_picture_asset->hash()) {
 471                 reel_picture_asset->asset_ref()->set_hash (reel_picture_asset->hash().get());
 472         }
 473
 474         shared_ptr<dcp::ReelSoundAsset> reel_sound_asset;
 475
 476         if (_sound_asset) {
 477                 /* We have made a sound asset of our own.  Put it into the reel */
 478                 reel_sound_asset.reset (new dcp::ReelSoundAsset (_sound_asset, 0));
 479         } else {
 480                 /* We don't have a sound asset of our own; hopefully we have one to reference */
 481                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
 482                         shared_ptr<dcp::ReelSoundAsset> k = dynamic_pointer_cast<dcp::ReelSoundAsset> (j.asset);
 483                         if (k && j.period == _period) {
 484                                 reel_sound_asset = k;
 485                                 /* If we have a hash for this asset in the CPL, assume that it is correct */
 486                                 if (k->hash()) {
 487                                         k->asset_ref()->set_hash (k->hash().get());
 488                                 }
 489                         }
 490                 }
 491         }
 492
 493         DCPOMATIC_ASSERT (reel_sound_asset);
 494         if (reel_sound_asset->actual_duration() != period_duration) {
 495                 LOG_ERROR (
 496                         "Reel sound asset has length %1 but reel period is %2",
 497                         reel_sound_asset->actual_duration(),
 498                         period_duration
 499                         );
 500                 if (reel_sound_asset->actual_duration() != period_duration) {
 501                         throw ProgrammingError (
 502                                 __FILE__, __LINE__,
 503                                 String::compose ("%1 vs %2", reel_sound_asset->actual_duration(), period_duration)
 504                                 );
 505                 }
 506
 507         }
 508         reel->add (reel_sound_asset);
 509
 510         maybe_add_text<dcp::ReelSubtitleAsset> (_subtitle_asset, reel_picture_asset->actual_duration(), reel, refs, fonts, _film, _period);
 511         for (map<DCPTextTrack, shared_ptr<dcp::SubtitleAsset> >::const_iterator i = _closed_caption_assets.begin(); i != _closed_caption_assets.end(); ++i) {
 512                 shared_ptr<dcp::ReelClosedCaptionAsset> a = maybe_add_text<dcp::ReelClosedCaptionAsset> (
 513                         i->second, reel_picture_asset->actual_duration(), reel, refs, fonts, _film, _period
 514                         );
 515                 a->set_annotation_text (i->first.name);
 516                 a->set_language (i->first.language);
 517         }
 518
 519         map<dcp::Marker, DCPTime> markers = _film->markers ();
 520         map<dcp::Marker, DCPTime> reel_markers;
 521         for (map<dcp::Marker, DCPTime>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 522                 if (_period.contains(i->second)) {
 523                         reel_markers[i->first] = i->second;
 524                 }
 525         }
 526
 527         if (!reel_markers.empty ()) {
 528                 shared_ptr<dcp::ReelMarkersAsset> ma (new dcp::ReelMarkersAsset(dcp::Fraction(_film->video_frame_rate(), 1), 0));
 529                 for (map<dcp::Marker, DCPTime>::const_iterator i = reel_markers.begin(); i != reel_markers.end(); ++i) {
 530                         int h, m, s, f;
 531                         DCPTime relative = i->second - _period.from;
 532                         relative.split (_film->video_frame_rate(), h, m, s, f);
 533                         ma->set (i->first, dcp::Time(h, m, s, f, _film->video_frame_rate()));
 534                 }
 535                 reel->add (ma);
 536         }
 537
 538         return reel;
 539 }
 540
 541 void
 542 ReelWriter::calculate_digests (boost::function<void (float)> set_progress)
 543 {
 544         if (_picture_asset) {
 545                 _picture_asset->hash (set_progress);
 546         }
 547
 548         if (_sound_asset) {
 549                 _sound_asset->hash (set_progress);
 550         }
 551 }
 552
 553 Frame
 554 ReelWriter::start () const
 555 {
 556         return _period.from.frames_floor (_film->video_frame_rate());
 557 }
 558
 559
 560 void
 561 ReelWriter::write (shared_ptr<const AudioBuffers> audio)
 562 {
 563         if (!_sound_asset_writer) {
 564                 return;
 565         }
 566
 567         DCPOMATIC_ASSERT (audio);
 568         _sound_asset_writer->write (audio->data(), audio->frames());
 569 }
 570
 571 void
 572 ReelWriter::write (PlayerText subs, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
 573 {
 574         shared_ptr<dcp::SubtitleAsset> asset;
 575
 576         switch (type) {
 577         case TEXT_OPEN_SUBTITLE:
 578                 asset = _subtitle_asset;
 579                 break;
 580         case TEXT_CLOSED_CAPTION:
 581                 DCPOMATIC_ASSERT (track);
 582                 asset = _closed_caption_assets[*track];
 583                 break;
 584         default:
 585                 DCPOMATIC_ASSERT (false);
 586         }
 587
 588         if (!asset) {
 589                 string lang = _film->subtitle_language ();
 590                 if (_film->interop ()) {
 591                         shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
 592                         s->set_movie_title (_film->name ());
 593                         if (type == TEXT_OPEN_SUBTITLE) {
 594                                 s->set_language (lang.empty() ? "Unknown" : lang);
 595                         } else {
 596                                 s->set_language (track->language);
 597                         }
 598                         s->set_reel_number (raw_convert<string> (_reel_index + 1));
 599                         asset = s;
 600                 } else {
 601                         shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
 602                         s->set_content_title_text (_film->name ());
 603                         if (type == TEXT_OPEN_SUBTITLE && !lang.empty()) {
 604                                 s->set_language (lang);
 605                         } else {
 606                                 s->set_language (track->language);
 607                         }
 608                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
 609                         s->set_reel_number (_reel_index + 1);
 610                         s->set_time_code_rate (_film->video_frame_rate ());
 611                         s->set_start_time (dcp::Time ());
 612                         if (_film->encrypted ()) {
 613                                 s->set_key (_film->key ());
 614                         }
 615                         asset = s;
 616                 }
 617         }
 618
 619         switch (type) {
 620         case TEXT_OPEN_SUBTITLE:
 621                 _subtitle_asset = asset;
 622                 break;
 623         case TEXT_CLOSED_CAPTION:
 624                 DCPOMATIC_ASSERT (track);
 625                 _closed_caption_assets[*track] = asset;
 626                 break;
 627         default:
 628                 DCPOMATIC_ASSERT (false);
 629         }
 630
 631         BOOST_FOREACH (StringText i, subs.string) {
 632                 /* XXX: couldn't / shouldn't we use period here rather than getting time from the subtitle? */
 633                 i.set_in  (i.in()  - dcp::Time (_period.from.seconds(), i.in().tcr));
 634                 i.set_out (i.out() - dcp::Time (_period.from.seconds(), i.out().tcr));
 635                 asset->add (shared_ptr<dcp::Subtitle>(new dcp::SubtitleString(i)));
 636         }
 637
 638         BOOST_FOREACH (BitmapText i, subs.bitmap) {
 639                 asset->add (
 640                         shared_ptr<dcp::Subtitle>(
 641                                 new dcp::SubtitleImage(
 642                                         i.image->as_png(),
 643                                         dcp::Time(period.from.seconds() - _period.from.seconds(), _film->video_frame_rate()),
 644                                         dcp::Time(period.to.seconds() - _period.from.seconds(), _film->video_frame_rate()),
 645                                         i.rectangle.x, dcp::HALIGN_LEFT, i.rectangle.y, dcp::VALIGN_TOP,
 646                                         dcp::Time(), dcp::Time()
 647                                         )
 648                                 )
 649                         );
 650         }
 651 }
 652
 653 bool
 654 ReelWriter::existing_picture_frame_ok (FILE* asset_file, FILE* info_file, Frame frame) const
 655 {
 656         LOG_GENERAL ("Checking existing picture frame %1", frame);
 657
 658         /* Read the data from the info file; for 3D we just check the left
 659            frames until we find a good one.
 660         */
 661         dcp::FrameInfo const info = read_frame_info (info_file, frame, _film->three_d () ? EYES_LEFT : EYES_BOTH);
 662
 663         bool ok = true;
 664
 665         /* Read the data from the asset and hash it */
 666         dcpomatic_fseek (asset_file, info.offset, SEEK_SET);
 667         Data data (info.size);
 668         size_t const read = fread (data.data().get(), 1, data.size(), asset_file);
 669         LOG_GENERAL ("Read %1 bytes of asset data; wanted %2", read, info.size);
 670         if (read != static_cast<size_t> (data.size ())) {
 671                 LOG_GENERAL ("Existing frame %1 is incomplete", frame);
 672                 ok = false;
 673         } else {
 674                 Digester digester;
 675                 digester.add (data.data().get(), data.size());
 676                 LOG_GENERAL ("Hash %1 vs %2", digester.get(), info.hash);
 677                 if (digester.get() != info.hash) {
 678                         LOG_GENERAL ("Existing frame %1 failed hash check", frame);
 679                         ok = false;
 680                 }
 681         }
 682
 683         return ok;
 684 }