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 /** @param job Related job, or 0 */
  68 ReelWriter::ReelWriter (
  69         shared_ptr<const Film> film, DCPTimePeriod period, shared_ptr<Job> job, int reel_index, int reel_count, optional<string> content_summary
  70         )
  71         : _film (film)
  72         , _period (period)
  73         , _last_written_video_frame (-1)
  74         , _last_written_eyes (EYES_RIGHT)
  75         , _reel_index (reel_index)
  76         , _reel_count (reel_count)
  77         , _content_summary (content_summary)
  78 {
  79         /* Create our picture asset in a subdirectory, named according to those
  80            film's parameters which affect the video output.  We will hard-link
  81            it into the DCP later.
  82         */
  83
  84         dcp::Standard const standard = _film->interop() ? dcp::INTEROP : dcp::SMPTE;
  85
  86         if (_film->three_d ()) {
  87                 _picture_asset.reset (new dcp::StereoPictureAsset (dcp::Fraction (_film->video_frame_rate(), 1), standard));
  88         } else {
  89                 _picture_asset.reset (new dcp::MonoPictureAsset (dcp::Fraction (_film->video_frame_rate(), 1), standard));
  90         }
  91
  92         _picture_asset->set_size (_film->frame_size ());
  93
  94         if (_film->encrypted ()) {
  95                 _picture_asset->set_key (_film->key ());
  96                 _picture_asset->set_context_id (_film->context_id ());
  97         }
  98
  99         _picture_asset->set_file (
 100                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period)
 101                 );
 102
 103         if (job) {
 104                 job->sub (_("Checking existing image data"));
 105         }
 106         _first_nonexistant_frame = check_existing_picture_asset ();
 107
 108         _picture_asset_writer = _picture_asset->start_write (
 109                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period),
 110                 _first_nonexistant_frame > 0
 111                 );
 112
 113         if (_film->audio_channels ()) {
 114                 _sound_asset.reset (
 115                         new dcp::SoundAsset (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels (), standard)
 116                         );
 117
 118                 if (_film->encrypted ()) {
 119                         _sound_asset->set_key (_film->key ());
 120                 }
 121
 122                 DCPOMATIC_ASSERT (_film->directory());
 123
 124                 /* Write the sound asset into the film directory so that we leave the creation
 125                    of the DCP directory until the last minute.
 126                 */
 127                 _sound_asset_writer = _sound_asset->start_write (
 128                         _film->directory().get() / audio_asset_filename (_sound_asset, _reel_index, _reel_count, _content_summary)
 129                         );
 130         }
 131 }
 132
 133 /** @param frame reel-relative frame */
 134 void
 135 ReelWriter::write_frame_info (Frame frame, Eyes eyes, dcp::FrameInfo info) const
 136 {
 137         FILE* file = 0;
 138         boost::filesystem::path info_file = _film->info_file (_period);
 139
 140         bool const read = boost::filesystem::exists (info_file);
 141
 142         if (read) {
 143                 file = fopen_boost (info_file, "r+b");
 144         } else {
 145                 file = fopen_boost (info_file, "wb");
 146         }
 147
 148         if (!file) {
 149                 throw OpenFileError (info_file, errno, read ? OpenFileError::READ_WRITE : OpenFileError::WRITE);
 150         }
 151         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 152         checked_fwrite (&info.offset, sizeof (info.offset), file, info_file);
 153         checked_fwrite (&info.size, sizeof (info.size), file, info_file);
 154         checked_fwrite (info.hash.c_str(), info.hash.size(), file, info_file);
 155         fclose (file);
 156 }
 157
 158 dcp::FrameInfo
 159 ReelWriter::read_frame_info (FILE* file, Frame frame, Eyes eyes) const
 160 {
 161         dcp::FrameInfo info;
 162         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 163         checked_fread (&info.offset, sizeof(info.offset), file, _film->info_file(_period));
 164         checked_fread (&info.size, sizeof(info.size), file, _film->info_file(_period));
 165
 166         char hash_buffer[33];
 167         checked_fread (hash_buffer, 32, file, _film->info_file(_period));
 168         hash_buffer[32] = '\0';
 169         info.hash = hash_buffer;
 170
 171         return info;
 172 }
 173
 174 long
 175 ReelWriter::frame_info_position (Frame frame, Eyes eyes) const
 176 {
 177         switch (eyes) {
 178         case EYES_BOTH:
 179                 return frame * _info_size;
 180         case EYES_LEFT:
 181                 return frame * _info_size * 2;
 182         case EYES_RIGHT:
 183                 return frame * _info_size * 2 + _info_size;
 184         default:
 185                 DCPOMATIC_ASSERT (false);
 186         }
 187
 188         DCPOMATIC_ASSERT (false);
 189 }
 190
 191 Frame
 192 ReelWriter::check_existing_picture_asset ()
 193 {
 194         DCPOMATIC_ASSERT (_picture_asset->file());
 195         boost::filesystem::path asset = _picture_asset->file().get();
 196
 197         /* If there is an existing asset, break any hard links to it as we are about to change its contents
 198            (if only by changing the IDs); see #1126.
 199         */
 200
 201         if (boost::filesystem::exists(asset) && boost::filesystem::hard_link_count(asset) > 1) {
 202                 boost::filesystem::copy_file (asset, asset.string() + ".tmp");
 203                 boost::filesystem::remove (asset);
 204                 boost::filesystem::rename (asset.string() + ".tmp", asset);
 205         }
 206
 207         /* Try to open the existing asset */
 208         FILE* asset_file = fopen_boost (asset, "rb");
 209         if (!asset_file) {
 210                 LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", asset.string(), errno);
 211                 return 0;
 212         } else {
 213                 LOG_GENERAL ("Opened existing asset at %1", asset.string());
 214         }
 215
 216         /* Offset of the last dcp::FrameInfo in the info file */
 217         int const n = (boost::filesystem::file_size (_film->info_file(_period)) / _info_size) - 1;
 218         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);
 219
 220         FILE* info_file = fopen_boost (_film->info_file(_period), "rb");
 221         if (!info_file) {
 222                 LOG_GENERAL_NC ("Could not open film info file");
 223                 fclose (asset_file);
 224                 return 0;
 225         }
 226
 227         Frame first_nonexistant_frame;
 228         if (_film->three_d ()) {
 229                 /* Start looking at the last left frame */
 230                 first_nonexistant_frame = n / 2;
 231         } else {
 232                 first_nonexistant_frame = n;
 233         }
 234
 235         while (!existing_picture_frame_ok(asset_file, info_file, first_nonexistant_frame) && first_nonexistant_frame > 0) {
 236                 --first_nonexistant_frame;
 237         }
 238
 239         if (!_film->three_d() && first_nonexistant_frame > 0) {
 240                 /* If we are doing 3D we might have found a good L frame with no R, so only
 241                    do this if we're in 2D and we've just found a good B(oth) frame.
 242                 */
 243                 ++first_nonexistant_frame;
 244         }
 245
 246         LOG_GENERAL ("Proceeding with first nonexistant frame %1", first_nonexistant_frame);
 247
 248         fclose (asset_file);
 249         fclose (info_file);
 250
 251         return first_nonexistant_frame;
 252 }
 253
 254 void
 255 ReelWriter::write (optional<Data> encoded, Frame frame, Eyes eyes)
 256 {
 257         dcp::FrameInfo fin = _picture_asset_writer->write (encoded->data().get (), encoded->size());
 258         write_frame_info (frame, eyes, fin);
 259         _last_written[eyes] = encoded;
 260         _last_written_video_frame = frame;
 261         _last_written_eyes = eyes;
 262 }
 263
 264 void
 265 ReelWriter::fake_write (Frame frame, Eyes eyes, int size)
 266 {
 267         _picture_asset_writer->fake_write (size);
 268         _last_written_video_frame = frame;
 269         _last_written_eyes = eyes;
 270 }
 271
 272 void
 273 ReelWriter::repeat_write (Frame frame, Eyes eyes)
 274 {
 275         dcp::FrameInfo fin = _picture_asset_writer->write (
 276                 _last_written[eyes]->data().get(),
 277                 _last_written[eyes]->size()
 278                 );
 279         write_frame_info (frame, eyes, fin);
 280         _last_written_video_frame = frame;
 281         _last_written_eyes = eyes;
 282 }
 283
 284 void
 285 ReelWriter::finish ()
 286 {
 287         if (!_picture_asset_writer->finalize ()) {
 288                 /* Nothing was written to the picture asset */
 289                 LOG_GENERAL ("Nothing was written to reel %1 of %2", _reel_index, _reel_count);
 290                 _picture_asset.reset ();
 291         }
 292
 293         if (_sound_asset_writer && !_sound_asset_writer->finalize ()) {
 294                 /* Nothing was written to the sound asset */
 295                 _sound_asset.reset ();
 296         }
 297
 298         /* Hard-link any video asset file into the DCP */
 299         if (_picture_asset) {
 300                 DCPOMATIC_ASSERT (_picture_asset->file());
 301                 boost::filesystem::path video_from = _picture_asset->file().get();
 302                 boost::filesystem::path video_to;
 303                 video_to /= _film->dir (_film->dcp_name());
 304                 video_to /= video_asset_filename (_picture_asset, _reel_index, _reel_count, _content_summary);
 305
 306                 boost::system::error_code ec;
 307                 boost::filesystem::create_hard_link (video_from, video_to, ec);
 308                 if (ec) {
 309                         LOG_WARNING_NC ("Hard-link failed; copying instead");
 310                         boost::filesystem::copy_file (video_from, video_to, ec);
 311                         if (ec) {
 312                                 LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
 313                                 throw FileError (ec.message(), video_from);
 314                         }
 315                 }
 316
 317                 _picture_asset->set_file (video_to);
 318         }
 319
 320         /* Move the audio asset into the DCP */
 321         if (_sound_asset) {
 322                 boost::filesystem::path audio_to;
 323                 audio_to /= _film->dir (_film->dcp_name ());
 324                 string const aaf = audio_asset_filename (_sound_asset, _reel_index, _reel_count, _content_summary);
 325                 audio_to /= aaf;
 326
 327                 boost::system::error_code ec;
 328                 boost::filesystem::rename (_film->file (aaf), audio_to, ec);
 329                 if (ec) {
 330                         throw FileError (
 331                                 String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), aaf
 332                                 );
 333                 }
 334
 335                 _sound_asset->set_file (audio_to);
 336         }
 337 }
 338
 339 template <class T>
 340 shared_ptr<T>
 341 maybe_add_text (
 342         shared_ptr<dcp::SubtitleAsset> asset,
 343         int64_t picture_duration,
 344         shared_ptr<dcp::Reel> reel,
 345         list<ReferencedReelAsset> const & refs,
 346         list<shared_ptr<Font> > const & fonts,
 347         shared_ptr<const Film> film,
 348         DCPTimePeriod period
 349         )
 350 {
 351         Frame const period_duration = period.duration().frames_round(film->video_frame_rate());
 352
 353         shared_ptr<T> reel_asset;
 354
 355         if (asset) {
 356                 boost::filesystem::path liberation_normal;
 357                 try {
 358                         liberation_normal = shared_path() / "LiberationSans-Regular.ttf";
 359                         if (!boost::filesystem::exists (liberation_normal)) {
 360                                 /* Hack for unit tests */
 361                                 liberation_normal = shared_path() / "fonts" / "LiberationSans-Regular.ttf";
 362                         }
 363                 } catch (boost::filesystem::filesystem_error& e) {
 364
 365                 }
 366
 367                 if (!boost::filesystem::exists(liberation_normal)) {
 368                         liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
 369                 }
 370
 371                 /* Add the font to the subtitle content */
 372                 BOOST_FOREACH (shared_ptr<Font> j, fonts) {
 373                         asset->add_font (j->id(), j->file().get_value_or(liberation_normal));
 374                 }
 375
 376                 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (asset)) {
 377                         boost::filesystem::path directory = film->dir (film->dcp_name ()) / asset->id ();
 378                         boost::filesystem::create_directories (directory);
 379                         asset->write (directory / ("sub_" + asset->id() + ".xml"));
 380                 } else {
 381                         /* All our assets should be the same length; use the picture asset length here
 382                            as a reference to set the subtitle one.  We'll use the duration rather than
 383                            the intrinsic duration; we don't care if the picture asset has been trimmed, we're
 384                            just interested in its presentation length.
 385                         */
 386                         dynamic_pointer_cast<dcp::SMPTESubtitleAsset>(asset)->set_intrinsic_duration (picture_duration);
 387
 388                         asset->write (
 389                                 film->dir(film->dcp_name()) / ("sub_" + asset->id() + ".mxf")
 390                                 );
 391                 }
 392
 393                 reel_asset.reset (
 394                         new T (
 395                                 asset,
 396                                 dcp::Fraction (film->video_frame_rate(), 1),
 397                                 picture_duration,
 398                                 0
 399                                 )
 400                         );
 401         } else {
 402                 /* We don't have a subtitle asset of our own; hopefully we have one to reference */
 403                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
 404                         shared_ptr<T> k = dynamic_pointer_cast<T> (j.asset);
 405                         if (k && j.period == period) {
 406                                 reel_asset = k;
 407                                 /* If we have a hash for this asset in the CPL, assume that it is correct */
 408                                 if (k->hash()) {
 409                                         k->asset_ref()->set_hash (k->hash().get());
 410                                 }
 411                         }
 412                 }
 413         }
 414
 415         if (reel_asset) {
 416                 if (reel_asset->actual_duration() != period_duration) {
 417                         throw ProgrammingError (
 418                                 __FILE__, __LINE__,
 419                                 String::compose ("%1 vs %2", reel_asset->actual_duration(), period_duration)
 420                                 );
 421                 }
 422                 reel->add (reel_asset);
 423         }
 424
 425         return reel_asset;
 426 }
 427
 428 shared_ptr<dcp::Reel>
 429 ReelWriter::create_reel (list<ReferencedReelAsset> const & refs, list<shared_ptr<Font> > const & fonts)
 430 {
 431         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
 432
 433         shared_ptr<dcp::ReelPictureAsset> reel_picture_asset;
 434
 435         if (_picture_asset) {
 436                 /* We have made a picture asset of our own.  Put it into the reel */
 437                 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
 438                 if (mono) {
 439                         reel_picture_asset.reset (new dcp::ReelMonoPictureAsset (mono, 0));
 440                 }
 441
 442                 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
 443                 if (stereo) {
 444                         reel_picture_asset.reset (new dcp::ReelStereoPictureAsset (stereo, 0));
 445                 }
 446         } else {
 447                 LOG_GENERAL ("no picture asset of our own; look through %1", refs.size());
 448                 /* We don't have a picture asset of our own; hopefully we have one to reference */
 449                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
 450                         shared_ptr<dcp::ReelPictureAsset> k = dynamic_pointer_cast<dcp::ReelPictureAsset> (j.asset);
 451                         if (k) {
 452                                 LOG_GENERAL ("candidate picture asset period is %1-%2", j.period.from.get(), j.period.to.get());
 453                         }
 454                         if (k && j.period == _period) {
 455                                 reel_picture_asset = k;
 456                         }
 457                 }
 458         }
 459
 460         LOG_GENERAL ("create_reel for %1-%2; %3 of %4", _period.from.get(), _period.to.get(), _reel_index, _reel_count);
 461
 462         Frame const period_duration = _period.duration().frames_round(_film->video_frame_rate());
 463
 464         DCPOMATIC_ASSERT (reel_picture_asset);
 465         if (reel_picture_asset->duration() != period_duration) {
 466                 throw ProgrammingError (
 467                         __FILE__, __LINE__,
 468                         String::compose ("%1 vs %2", reel_picture_asset->actual_duration(), period_duration)
 469                         );
 470         }
 471         reel->add (reel_picture_asset);
 472
 473         /* If we have a hash for this asset in the CPL, assume that it is correct */
 474         if (reel_picture_asset->hash()) {
 475                 reel_picture_asset->asset_ref()->set_hash (reel_picture_asset->hash().get());
 476         }
 477
 478         shared_ptr<dcp::ReelSoundAsset> reel_sound_asset;
 479
 480         if (_sound_asset) {
 481                 /* We have made a sound asset of our own.  Put it into the reel */
 482                 reel_sound_asset.reset (new dcp::ReelSoundAsset (_sound_asset, 0));
 483         } else {
 484                 /* We don't have a sound asset of our own; hopefully we have one to reference */
 485                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
 486                         shared_ptr<dcp::ReelSoundAsset> k = dynamic_pointer_cast<dcp::ReelSoundAsset> (j.asset);
 487                         if (k && j.period == _period) {
 488                                 reel_sound_asset = k;
 489                                 /* If we have a hash for this asset in the CPL, assume that it is correct */
 490                                 if (k->hash()) {
 491                                         k->asset_ref()->set_hash (k->hash().get());
 492                                 }
 493                         }
 494                 }
 495         }
 496
 497         DCPOMATIC_ASSERT (reel_sound_asset);
 498         if (reel_sound_asset->actual_duration() != period_duration) {
 499                 LOG_ERROR (
 500                         "Reel sound asset has length %1 but reel period is %2",
 501                         reel_sound_asset->actual_duration(),
 502                         period_duration
 503                         );
 504                 if (reel_sound_asset->actual_duration() != period_duration) {
 505                         throw ProgrammingError (
 506                                 __FILE__, __LINE__,
 507                                 String::compose ("%1 vs %2", reel_sound_asset->actual_duration(), period_duration)
 508                                 );
 509                 }
 510
 511         }
 512         reel->add (reel_sound_asset);
 513
 514         maybe_add_text<dcp::ReelSubtitleAsset> (_subtitle_asset, reel_picture_asset->actual_duration(), reel, refs, fonts, _film, _period);
 515         for (map<DCPTextTrack, shared_ptr<dcp::SubtitleAsset> >::const_iterator i = _closed_caption_assets.begin(); i != _closed_caption_assets.end(); ++i) {
 516                 shared_ptr<dcp::ReelClosedCaptionAsset> a = maybe_add_text<dcp::ReelClosedCaptionAsset> (
 517                         i->second, reel_picture_asset->actual_duration(), reel, refs, fonts, _film, _period
 518                         );
 519                 a->set_annotation_text (i->first.name);
 520                 a->set_language (i->first.language);
 521         }
 522
 523         map<dcp::Marker, DCPTime> markers = _film->markers ();
 524         map<dcp::Marker, DCPTime> reel_markers;
 525         for (map<dcp::Marker, DCPTime>::const_iterator i = markers.begin(); i != markers.end(); ++i) {
 526                 if (_period.contains(i->second)) {
 527                         reel_markers[i->first] = i->second;
 528                 }
 529         }
 530
 531         if (!reel_markers.empty ()) {
 532                 shared_ptr<dcp::ReelMarkersAsset> ma (new dcp::ReelMarkersAsset(dcp::Fraction(_film->video_frame_rate(), 1), 0));
 533                 for (map<dcp::Marker, DCPTime>::const_iterator i = reel_markers.begin(); i != reel_markers.end(); ++i) {
 534                         int h, m, s, f;
 535                         DCPTime relative = i->second - _period.from;
 536                         relative.split (_film->video_frame_rate(), h, m, s, f);
 537                         ma->set (i->first, dcp::Time(h, m, s, f, _film->video_frame_rate()));
 538                 }
 539                 reel->add (ma);
 540         }
 541
 542         return reel;
 543 }
 544
 545 void
 546 ReelWriter::calculate_digests (boost::function<void (float)> set_progress)
 547 {
 548         if (_picture_asset) {
 549                 _picture_asset->hash (set_progress);
 550         }
 551
 552         if (_sound_asset) {
 553                 _sound_asset->hash (set_progress);
 554         }
 555 }
 556
 557 Frame
 558 ReelWriter::start () const
 559 {
 560         return _period.from.frames_floor (_film->video_frame_rate());
 561 }
 562
 563
 564 void
 565 ReelWriter::write (shared_ptr<const AudioBuffers> audio)
 566 {
 567         if (!_sound_asset_writer) {
 568                 return;
 569         }
 570
 571         DCPOMATIC_ASSERT (audio);
 572         _sound_asset_writer->write (audio->data(), audio->frames());
 573 }
 574
 575 void
 576 ReelWriter::write (PlayerText subs, TextType type, optional<DCPTextTrack> track, DCPTimePeriod period)
 577 {
 578         shared_ptr<dcp::SubtitleAsset> asset;
 579
 580         switch (type) {
 581         case TEXT_OPEN_SUBTITLE:
 582                 asset = _subtitle_asset;
 583                 break;
 584         case TEXT_CLOSED_CAPTION:
 585                 DCPOMATIC_ASSERT (track);
 586                 asset = _closed_caption_assets[*track];
 587                 break;
 588         default:
 589                 DCPOMATIC_ASSERT (false);
 590         }
 591
 592         if (!asset) {
 593                 string lang = _film->subtitle_language ();
 594                 if (_film->interop ()) {
 595                         shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
 596                         s->set_movie_title (_film->name ());
 597                         if (type == TEXT_OPEN_SUBTITLE) {
 598                                 s->set_language (lang.empty() ? "Unknown" : lang);
 599                         } else {
 600                                 s->set_language (track->language);
 601                         }
 602                         s->set_reel_number (raw_convert<string> (_reel_index + 1));
 603                         asset = s;
 604                 } else {
 605                         shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
 606                         s->set_content_title_text (_film->name ());
 607                         if (type == TEXT_OPEN_SUBTITLE && !lang.empty()) {
 608                                 s->set_language (lang);
 609                         } else {
 610                                 s->set_language (track->language);
 611                         }
 612                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
 613                         s->set_reel_number (_reel_index + 1);
 614                         s->set_time_code_rate (_film->video_frame_rate ());
 615                         s->set_start_time (dcp::Time ());
 616                         if (_film->encrypted ()) {
 617                                 s->set_key (_film->key ());
 618                         }
 619                         asset = s;
 620                 }
 621         }
 622
 623         switch (type) {
 624         case TEXT_OPEN_SUBTITLE:
 625                 _subtitle_asset = asset;
 626                 break;
 627         case TEXT_CLOSED_CAPTION:
 628                 DCPOMATIC_ASSERT (track);
 629                 _closed_caption_assets[*track] = asset;
 630                 break;
 631         default:
 632                 DCPOMATIC_ASSERT (false);
 633         }
 634
 635         BOOST_FOREACH (StringText i, subs.string) {
 636                 /* XXX: couldn't / shouldn't we use period here rather than getting time from the subtitle? */
 637                 i.set_in  (i.in()  - dcp::Time (_period.from.seconds(), i.in().tcr));
 638                 i.set_out (i.out() - dcp::Time (_period.from.seconds(), i.out().tcr));
 639                 asset->add (shared_ptr<dcp::Subtitle>(new dcp::SubtitleString(i)));
 640         }
 641
 642         BOOST_FOREACH (BitmapText i, subs.bitmap) {
 643                 asset->add (
 644                         shared_ptr<dcp::Subtitle>(
 645                                 new dcp::SubtitleImage(
 646                                         i.image->as_png(),
 647                                         dcp::Time(period.from.seconds() - _period.from.seconds(), _film->video_frame_rate()),
 648                                         dcp::Time(period.to.seconds() - _period.from.seconds(), _film->video_frame_rate()),
 649                                         i.rectangle.x, dcp::HALIGN_LEFT, i.rectangle.y, dcp::VALIGN_TOP,
 650                                         dcp::Time(), dcp::Time()
 651                                         )
 652                                 )
 653                         );
 654         }
 655 }
 656
 657 bool
 658 ReelWriter::existing_picture_frame_ok (FILE* asset_file, FILE* info_file, Frame frame) const
 659 {
 660         LOG_GENERAL ("Checking existing picture frame %1", frame);
 661
 662         /* Read the data from the info file; for 3D we just check the left
 663            frames until we find a good one.
 664         */
 665         dcp::FrameInfo const info = read_frame_info (info_file, frame, _film->three_d () ? EYES_LEFT : EYES_BOTH);
 666
 667         bool ok = true;
 668
 669         /* Read the data from the asset and hash it */
 670         dcpomatic_fseek (asset_file, info.offset, SEEK_SET);
 671         Data data (info.size);
 672         size_t const read = fread (data.data().get(), 1, data.size(), asset_file);
 673         LOG_GENERAL ("Read %1 bytes of asset data; wanted %2", read, info.size);
 674         if (read != static_cast<size_t> (data.size ())) {
 675                 LOG_GENERAL ("Existing frame %1 is incomplete", frame);
 676                 ok = false;
 677         } else {
 678                 Digester digester;
 679                 digester.add (data.data().get(), data.size());
 680                 LOG_GENERAL ("Hash %1 vs %2", digester.get(), info.hash);
 681                 if (digester.get() != info.hash) {
 682                         LOG_GENERAL ("Existing frame %1 failed hash check", frame);
 683                         ok = false;
 684                 }
 685         }
 686
 687         return ok;
 688 }