src/lib/writer.cc

   1 /*
   2     Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include "writer.h"
  21 #include "compose.hpp"
  22 #include "film.h"
  23 #include "ratio.h"
  24 #include "log.h"
  25 #include "dcp_video.h"
  26 #include "dcp_content_type.h"
  27 #include "audio_mapping.h"
  28 #include "config.h"
  29 #include "job.h"
  30 #include "cross.h"
  31 #include "audio_buffers.h"
  32 #include "md5_digester.h"
  33 #include "data.h"
  34 #include "version.h"
  35 #include "font.h"
  36 #include "util.h"
  37 #include <dcp/mono_picture_asset.h>
  38 #include <dcp/stereo_picture_asset.h>
  39 #include <dcp/sound_asset.h>
  40 #include <dcp/sound_asset_writer.h>
  41 #include <dcp/reel.h>
  42 #include <dcp/reel_mono_picture_asset.h>
  43 #include <dcp/reel_stereo_picture_asset.h>
  44 #include <dcp/reel_sound_asset.h>
  45 #include <dcp/reel_subtitle_asset.h>
  46 #include <dcp/dcp.h>
  47 #include <dcp/cpl.h>
  48 #include <dcp/certificate_chain.h>
  49 #include <dcp/interop_subtitle_asset.h>
  50 #include <dcp/smpte_subtitle_asset.h>
  51 #include <boost/foreach.hpp>
  52 #include <fstream>
  53 #include <cerrno>
  54
  55 #include "i18n.h"
  56
  57 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_GENERAL);
  58 #define LOG_DEBUG_ENCODE(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_DEBUG_ENCODE);
  59 #define LOG_TIMING(...) _film->log()->microsecond_log (String::compose (__VA_ARGS__), Log::TYPE_TIMING);
  60 #define LOG_WARNING_NC(...) _film->log()->log (__VA_ARGS__, Log::TYPE_WARNING);
  61 #define LOG_WARNING(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_WARNING);
  62 #define LOG_ERROR(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
  63
  64 /* OS X strikes again */
  65 #undef set_key
  66
  67 using std::make_pair;
  68 using std::pair;
  69 using std::string;
  70 using std::list;
  71 using std::cout;
  72 using boost::shared_ptr;
  73 using boost::weak_ptr;
  74 using boost::dynamic_pointer_cast;
  75
  76 Writer::Writer (shared_ptr<const Film> film, weak_ptr<Job> j)
  77         : _film (film)
  78         , _job (j)
  79         , _first_nonexistant_frame (0)
  80         , _thread (0)
  81         , _finish (false)
  82         , _queued_full_in_memory (0)
  83         , _last_written_frame (-1)
  84         , _last_written_eyes (EYES_RIGHT)
  85         , _maximum_frames_in_memory (0)
  86         , _full_written (0)
  87         , _fake_written (0)
  88         , _repeat_written (0)
  89         , _pushed_to_disk (0)
  90 {
  91         /* Remove any old DCP */
  92         boost::filesystem::remove_all (_film->dir (_film->dcp_name ()));
  93
  94         shared_ptr<Job> job = _job.lock ();
  95         DCPOMATIC_ASSERT (job);
  96
  97         /* Create our picture asset in a subdirectory, named according to those
  98            film's parameters which affect the video output.  We will hard-link
  99            it into the DCP later.
 100         */
 101
 102         if (_film->three_d ()) {
 103                 _picture_asset.reset (new dcp::StereoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
 104         } else {
 105                 _picture_asset.reset (new dcp::MonoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
 106         }
 107
 108         _picture_asset->set_size (_film->frame_size ());
 109
 110         if (_film->encrypted ()) {
 111                 _picture_asset->set_key (_film->key ());
 112         }
 113
 114         _picture_asset->set_file (
 115                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename()
 116                 );
 117
 118         job->sub (_("Checking existing image data"));
 119         check_existing_picture_asset ();
 120
 121         _picture_asset_writer = _picture_asset->start_write (
 122                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(),
 123                 _film->interop() ? dcp::INTEROP : dcp::SMPTE,
 124                 _first_nonexistant_frame > 0
 125                 );
 126
 127         if (_film->audio_channels ()) {
 128                 _sound_asset.reset (
 129                         new dcp::SoundAsset (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels ())
 130                         );
 131
 132                 if (_film->encrypted ()) {
 133                         _sound_asset->set_key (_film->key ());
 134                 }
 135
 136                 /* Write the sound asset into the film directory so that we leave the creation
 137                    of the DCP directory until the last minute.
 138                 */
 139                 _sound_asset_writer = _sound_asset->start_write (
 140                         _film->directory() / audio_asset_filename (_sound_asset),
 141                         _film->interop() ? dcp::INTEROP : dcp::SMPTE
 142                         );
 143         }
 144
 145         /* Check that the signer is OK if we need one */
 146         if (_film->is_signed() && !Config::instance()->signer_chain()->valid ()) {
 147                 throw InvalidSignerError ();
 148         }
 149
 150         job->sub (_("Encoding image data"));
 151 }
 152
 153 void
 154 Writer::start ()
 155 {
 156         _thread = new boost::thread (boost::bind (&Writer::thread, this));
 157 }
 158
 159 Writer::~Writer ()
 160 {
 161         terminate_thread (false);
 162 }
 163
 164 void
 165 Writer::write (Data encoded, int frame, Eyes eyes)
 166 {
 167         boost::mutex::scoped_lock lock (_state_mutex);
 168
 169         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 170                 /* The queue is too big; wait until that is sorted out */
 171                 _full_condition.wait (lock);
 172         }
 173
 174         QueueItem qi;
 175         qi.type = QueueItem::FULL;
 176         qi.encoded = encoded;
 177         qi.frame = frame;
 178
 179         if (_film->three_d() && eyes == EYES_BOTH) {
 180                 /* 2D material in a 3D DCP; fake the 3D */
 181                 qi.eyes = EYES_LEFT;
 182                 _queue.push_back (qi);
 183                 ++_queued_full_in_memory;
 184                 qi.eyes = EYES_RIGHT;
 185                 _queue.push_back (qi);
 186                 ++_queued_full_in_memory;
 187         } else {
 188                 qi.eyes = eyes;
 189                 _queue.push_back (qi);
 190                 ++_queued_full_in_memory;
 191         }
 192
 193         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 194         _empty_condition.notify_all ();
 195 }
 196
 197 void
 198 Writer::repeat (int frame, Eyes eyes)
 199 {
 200         boost::mutex::scoped_lock lock (_state_mutex);
 201
 202         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 203                 /* The queue is too big; wait until that is sorted out */
 204                 _full_condition.wait (lock);
 205         }
 206
 207         QueueItem qi;
 208         qi.type = QueueItem::REPEAT;
 209         qi.frame = frame;
 210         if (_film->three_d() && eyes == EYES_BOTH) {
 211                 qi.eyes = EYES_LEFT;
 212                 _queue.push_back (qi);
 213                 qi.eyes = EYES_RIGHT;
 214                 _queue.push_back (qi);
 215         } else {
 216                 qi.eyes = eyes;
 217                 _queue.push_back (qi);
 218         }
 219
 220         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 221         _empty_condition.notify_all ();
 222 }
 223
 224 void
 225 Writer::fake_write (int frame, Eyes eyes)
 226 {
 227         boost::mutex::scoped_lock lock (_state_mutex);
 228
 229         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 230                 /* The queue is too big; wait until that is sorted out */
 231                 _full_condition.wait (lock);
 232         }
 233
 234         FILE* file = fopen_boost (_film->info_file (), "rb");
 235         if (!file) {
 236                 throw ReadFileError (_film->info_file ());
 237         }
 238         dcp::FrameInfo info = read_frame_info (file, frame, eyes);
 239         fclose (file);
 240
 241         QueueItem qi;
 242         qi.type = QueueItem::FAKE;
 243         qi.size = info.size;
 244         qi.frame = frame;
 245         if (_film->three_d() && eyes == EYES_BOTH) {
 246                 qi.eyes = EYES_LEFT;
 247                 _queue.push_back (qi);
 248                 qi.eyes = EYES_RIGHT;
 249                 _queue.push_back (qi);
 250         } else {
 251                 qi.eyes = eyes;
 252                 _queue.push_back (qi);
 253         }
 254
 255         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 256         _empty_condition.notify_all ();
 257 }
 258
 259 /** This method is not thread safe */
 260 void
 261 Writer::write (shared_ptr<const AudioBuffers> audio)
 262 {
 263         if (_sound_asset_writer) {
 264                 _sound_asset_writer->write (audio->data(), audio->frames());
 265         }
 266 }
 267
 268 /** This must be called from Writer::thread() with an appropriate lock held */
 269 bool
 270 Writer::have_sequenced_image_at_queue_head ()
 271 {
 272         if (_queue.empty ()) {
 273                 return false;
 274         }
 275
 276         _queue.sort ();
 277
 278         /* The queue should contain only EYES_LEFT/EYES_RIGHT pairs or EYES_BOTH */
 279
 280         if (_queue.front().eyes == EYES_BOTH) {
 281                 /* 2D */
 282                 return _queue.front().frame == (_last_written_frame + 1);
 283         }
 284
 285         /* 3D */
 286
 287         if (_last_written_eyes == EYES_LEFT && _queue.front().frame == _last_written_frame && _queue.front().eyes == EYES_RIGHT) {
 288                 return true;
 289         }
 290
 291         if (_last_written_eyes == EYES_RIGHT && _queue.front().frame == (_last_written_frame + 1) && _queue.front().eyes == EYES_LEFT) {
 292                 return true;
 293         }
 294
 295         return false;
 296 }
 297
 298 void
 299 Writer::write_frame_info (int frame, Eyes eyes, dcp::FrameInfo info) const
 300 {
 301         FILE* file = 0;
 302         if (boost::filesystem::exists (_film->info_file ())) {
 303                 file = fopen_boost (_film->info_file(), "r+b");
 304         } else {
 305                 file = fopen_boost (_film->info_file(), "wb");
 306         }
 307         if (!file) {
 308                 throw OpenFileError (_film->info_file ());
 309         }
 310         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 311         fwrite (&info.offset, sizeof (info.offset), 1, file);
 312         fwrite (&info.size, sizeof (info.size), 1, file);
 313         fwrite (info.hash.c_str(), 1, info.hash.size(), file);
 314         fclose (file);
 315 }
 316
 317 void
 318 Writer::thread ()
 319 try
 320 {
 321         while (true)
 322         {
 323                 boost::mutex::scoped_lock lock (_state_mutex);
 324
 325                 while (true) {
 326
 327                         if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
 328                                 /* We've got something to do: go and do it */
 329                                 break;
 330                         }
 331
 332                         /* Nothing to do: wait until something happens which may indicate that we do */
 333                         LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
 334                         _empty_condition.wait (lock);
 335                         LOG_TIMING (N_("writer-wake queue=%1"), _queue.size());
 336                 }
 337
 338                 if (_finish && _queue.empty()) {
 339                         return;
 340                 }
 341
 342                 /* We stop here if we have been asked to finish, and if either the queue
 343                    is empty or we do not have a sequenced image at its head (if this is the
 344                    case we will never terminate as no new frames will be sent once
 345                    _finish is true).
 346                 */
 347                 if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
 348                         /* (Hopefully temporarily) log anything that was not written */
 349                         if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
 350                                 LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
 351                                 for (list<QueueItem>::const_iterator i = _queue.begin(); i != _queue.end(); ++i) {
 352                                         if (i->type == QueueItem::FULL) {
 353                                                 LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i->frame, i->eyes);
 354                                         } else {
 355                                                 LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i->size, i->frame, i->eyes);
 356                                         }
 357                                 }
 358                                 LOG_WARNING (N_("Last written frame %1, last written eyes %2"), _last_written_frame, _last_written_eyes);
 359                         }
 360                         return;
 361                 }
 362                 /* Write any frames that we can write; i.e. those that are in sequence. */
 363                 while (have_sequenced_image_at_queue_head ()) {
 364                         QueueItem qi = _queue.front ();
 365                         _queue.pop_front ();
 366                         if (qi.type == QueueItem::FULL && qi.encoded) {
 367                                 --_queued_full_in_memory;
 368                         }
 369
 370                         lock.unlock ();
 371                         switch (qi.type) {
 372                         case QueueItem::FULL:
 373                         {
 374                                 LOG_DEBUG_ENCODE (N_("Writer FULL-writes %1 (%2)"), qi.frame, qi.eyes);
 375                                 if (!qi.encoded) {
 376                                         qi.encoded = Data (_film->j2c_path (qi.frame, qi.eyes, false));
 377                                 }
 378
 379                                 dcp::FrameInfo fin = _picture_asset_writer->write (qi.encoded->data().get (), qi.encoded->size());
 380                                 write_frame_info (qi.frame, qi.eyes, fin);
 381                                 _last_written[qi.eyes] = qi.encoded;
 382                                 ++_full_written;
 383                                 break;
 384                         }
 385                         case QueueItem::FAKE:
 386                                 LOG_DEBUG_ENCODE (N_("Writer FAKE-writes %1"), qi.frame);
 387                                 _picture_asset_writer->fake_write (qi.size);
 388                                 _last_written[qi.eyes].reset ();
 389                                 ++_fake_written;
 390                                 break;
 391                         case QueueItem::REPEAT:
 392                                 LOG_DEBUG_ENCODE (N_("Writer REPEAT-writes %1"), qi.frame);
 393                                 dcp::FrameInfo fin = _picture_asset_writer->write (
 394                                         _last_written[qi.eyes]->data().get(),
 395                                         _last_written[qi.eyes]->size()
 396                                         );
 397                                 write_frame_info (qi.frame, qi.eyes, fin);
 398                                 ++_repeat_written;
 399                                 break;
 400                         }
 401                         lock.lock ();
 402
 403                         _last_written_frame = qi.frame;
 404                         _last_written_eyes = qi.eyes;
 405
 406                         shared_ptr<Job> job = _job.lock ();
 407                         DCPOMATIC_ASSERT (job);
 408                         int64_t total = _film->length().frames_round (_film->video_frame_rate ());
 409                         if (_film->three_d ()) {
 410                                 /* _full_written and so on are incremented for each eye, so we need to double the total
 411                                    frames to get the correct progress.
 412                                 */
 413                                 total *= 2;
 414                         }
 415                         if (total) {
 416                                 job->set_progress (float (_full_written + _fake_written + _repeat_written) / total);
 417                         }
 418                 }
 419
 420                 while (_queued_full_in_memory > _maximum_frames_in_memory) {
 421                         /* Too many frames in memory which can't yet be written to the stream.
 422                            Write some FULL frames to disk.
 423                         */
 424
 425                         /* Find one from the back of the queue */
 426                         _queue.sort ();
 427                         list<QueueItem>::reverse_iterator i = _queue.rbegin ();
 428                         while (i != _queue.rend() && (i->type != QueueItem::FULL || !i->encoded)) {
 429                                 ++i;
 430                         }
 431
 432                         DCPOMATIC_ASSERT (i != _queue.rend());
 433                         ++_pushed_to_disk;
 434                         lock.unlock ();
 435
 436                         /* i is valid here, even though we don't hold a lock on the mutex,
 437                            since list iterators are unaffected by insertion and only this
 438                            thread could erase the last item in the list.
 439                         */
 440
 441                         LOG_GENERAL (
 442                                 "Writer full (awaiting %1 [last eye was %2]); pushes %3 to disk",
 443                                 _last_written_frame + 1,
 444                                 _last_written_eyes, i->frame
 445                                 );
 446
 447                         i->encoded->write_via_temp (_film->j2c_path (i->frame, i->eyes, true), _film->j2c_path (i->frame, i->eyes, false));
 448
 449                         lock.lock ();
 450                         i->encoded.reset ();
 451                         --_queued_full_in_memory;
 452                 }
 453
 454                 /* The queue has probably just gone down a bit; notify anything wait()ing on _full_condition */
 455                 _full_condition.notify_all ();
 456         }
 457 }
 458 catch (...)
 459 {
 460         store_current ();
 461 }
 462
 463 void
 464 Writer::terminate_thread (bool can_throw)
 465 {
 466         boost::mutex::scoped_lock lock (_state_mutex);
 467         if (_thread == 0) {
 468                 return;
 469         }
 470
 471         _finish = true;
 472         _empty_condition.notify_all ();
 473         _full_condition.notify_all ();
 474         lock.unlock ();
 475
 476         _thread->join ();
 477         if (can_throw) {
 478                 rethrow ();
 479         }
 480
 481         delete _thread;
 482         _thread = 0;
 483 }
 484
 485 void
 486 Writer::finish ()
 487 {
 488         if (!_thread) {
 489                 return;
 490         }
 491
 492         terminate_thread (true);
 493
 494         _picture_asset_writer->finalize ();
 495         if (_sound_asset_writer) {
 496                 _sound_asset_writer->finalize ();
 497         }
 498
 499         /* Hard-link the video asset into the DCP */
 500         boost::filesystem::path video_from = _picture_asset->file ();
 501
 502         boost::filesystem::path video_to;
 503         video_to /= _film->dir (_film->dcp_name());
 504         video_to /= video_asset_filename (_picture_asset);
 505
 506         boost::system::error_code ec;
 507         boost::filesystem::create_hard_link (video_from, video_to, ec);
 508         if (ec) {
 509                 LOG_WARNING_NC ("Hard-link failed; copying instead");
 510                 boost::filesystem::copy_file (video_from, video_to, ec);
 511                 if (ec) {
 512                         LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
 513                         throw FileError (ec.message(), video_from);
 514                 }
 515         }
 516
 517         _picture_asset->set_file (video_to);
 518
 519         /* Move the audio asset into the DCP */
 520
 521         if (_sound_asset) {
 522                 boost::filesystem::path audio_to;
 523                 audio_to /= _film->dir (_film->dcp_name ());
 524                 audio_to /= audio_asset_filename (_sound_asset);
 525
 526                 boost::filesystem::rename (_film->file (audio_asset_filename (_sound_asset)), audio_to, ec);
 527                 if (ec) {
 528                         throw FileError (
 529                                 String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), audio_asset_filename (_sound_asset)
 530                                 );
 531                 }
 532
 533                 _sound_asset->set_file (audio_to);
 534         }
 535
 536         dcp::DCP dcp (_film->dir (_film->dcp_name()));
 537
 538         shared_ptr<dcp::CPL> cpl (
 539                 new dcp::CPL (
 540                         _film->dcp_name(),
 541                         _film->dcp_content_type()->libdcp_kind ()
 542                         )
 543                 );
 544
 545         dcp.add (cpl);
 546
 547         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
 548
 549         shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
 550         if (mono) {
 551                 reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelMonoPictureAsset (mono, 0)));
 552         }
 553
 554         shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
 555         if (stereo) {
 556                 reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelStereoPictureAsset (stereo, 0)));
 557         }
 558
 559         if (_sound_asset) {
 560                 reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_asset, 0)));
 561         }
 562
 563         if (_subtitle_asset) {
 564                 boost::filesystem::path liberation;
 565                 try {
 566                         liberation = shared_path () / "LiberationSans-Regular.ttf";
 567                 } catch (boost::filesystem::filesystem_error& e) {
 568                         /* Hack: try the debian/ubuntu location if getting the shared path failed */
 569                         liberation = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
 570                 }
 571
 572                 /* Add all the fonts to the subtitle content */
 573                 BOOST_FOREACH (shared_ptr<Font> i, _fonts) {
 574                         _subtitle_asset->add_font (i->id(), i->file().get_value_or (liberation));
 575                 }
 576
 577                 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (_subtitle_asset)) {
 578                         boost::filesystem::path directory = _film->dir (_film->dcp_name ()) / _subtitle_asset->id ();
 579                         boost::filesystem::create_directories (directory);
 580                         _subtitle_asset->write (directory / ("sub_" + _subtitle_asset->id() + ".xml"));
 581                 } else {
 582                         _subtitle_asset->write (
 583                                 _film->dir (_film->dcp_name ()) / ("sub_" + _subtitle_asset->id() + ".mxf")
 584                                 );
 585                 }
 586
 587                 reel->add (shared_ptr<dcp::ReelSubtitleAsset> (
 588                                    new dcp::ReelSubtitleAsset (
 589                                            _subtitle_asset,
 590                                            dcp::Fraction (_film->video_frame_rate(), 1),
 591                                            _picture_asset->intrinsic_duration (),
 592                                            0
 593                                            )
 594                                    ));
 595         }
 596
 597         cpl->add (reel);
 598
 599         shared_ptr<Job> job = _job.lock ();
 600         DCPOMATIC_ASSERT (job);
 601
 602         job->sub (_("Computing image digest"));
 603         _picture_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
 604
 605         if (_sound_asset) {
 606                 job->sub (_("Computing audio digest"));
 607                 _sound_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
 608         }
 609
 610         dcp::XMLMetadata meta;
 611         meta.creator = Config::instance()->dcp_creator ();
 612         if (meta.creator.empty ()) {
 613                 meta.creator = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 614         }
 615         meta.issuer = Config::instance()->dcp_issuer ();
 616         if (meta.issuer.empty ()) {
 617                 meta.issuer = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 618         }
 619         meta.set_issue_date_now ();
 620
 621         cpl->set_metadata (meta);
 622
 623         shared_ptr<const dcp::CertificateChain> signer;
 624         if (_film->is_signed ()) {
 625                 signer = Config::instance()->signer_chain ();
 626                 /* We did check earlier, but check again here to be on the safe side */
 627                 if (!signer->valid ()) {
 628                         throw InvalidSignerError ();
 629                 }
 630         }
 631
 632         dcp.write_xml (_film->interop () ? dcp::INTEROP : dcp::SMPTE, meta, signer);
 633
 634         LOG_GENERAL (
 635                 N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT, %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk
 636                 );
 637 }
 638
 639 bool
 640 Writer::check_existing_picture_asset_frame (FILE* asset, int f, Eyes eyes)
 641 {
 642         /* Read the frame info as written */
 643         FILE* file = fopen_boost (_film->info_file (), "rb");
 644         if (!file) {
 645                 LOG_GENERAL ("Existing frame %1 has no info file", f);
 646                 return false;
 647         }
 648
 649         dcp::FrameInfo info = read_frame_info (file, f, eyes);
 650         fclose (file);
 651         if (info.size == 0) {
 652                 LOG_GENERAL ("Existing frame %1 has no info file", f);
 653                 return false;
 654         }
 655
 656         /* Read the data from the asset and hash it */
 657         dcpomatic_fseek (asset, info.offset, SEEK_SET);
 658         Data data (info.size);
 659         size_t const read = fread (data.data().get(), 1, data.size(), asset);
 660         if (read != static_cast<size_t> (data.size ())) {
 661                 LOG_GENERAL ("Existing frame %1 is incomplete", f);
 662                 return false;
 663         }
 664
 665         MD5Digester digester;
 666         digester.add (data.data().get(), data.size());
 667         if (digester.get() != info.hash) {
 668                 LOG_GENERAL ("Existing frame %1 failed hash check", f);
 669                 return false;
 670         }
 671
 672         return true;
 673 }
 674
 675 void
 676 Writer::check_existing_picture_asset ()
 677 {
 678         /* Try to open the existing asset */
 679         FILE* asset = fopen_boost (_picture_asset->file(), "rb");
 680         if (!asset) {
 681                 LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", _picture_asset->file().string(), errno);
 682                 return;
 683         }
 684
 685         while (true) {
 686
 687                 shared_ptr<Job> job = _job.lock ();
 688                 DCPOMATIC_ASSERT (job);
 689
 690                 job->set_progress_unknown ();
 691
 692                 if (_film->three_d ()) {
 693                         if (!check_existing_picture_asset_frame (asset, _first_nonexistant_frame, EYES_LEFT)) {
 694                                 break;
 695                         }
 696                         if (!check_existing_picture_asset_frame (asset, _first_nonexistant_frame, EYES_RIGHT)) {
 697                                 break;
 698                         }
 699                 } else {
 700                         if (!check_existing_picture_asset_frame (asset, _first_nonexistant_frame, EYES_BOTH)) {
 701                                 break;
 702                         }
 703                 }
 704
 705                 LOG_DEBUG_ENCODE ("Have existing frame %1", _first_nonexistant_frame);
 706                 ++_first_nonexistant_frame;
 707         }
 708
 709         fclose (asset);
 710 }
 711
 712 /** @param frame Frame index.
 713  *  @return true if we can fake-write this frame.
 714  */
 715 bool
 716 Writer::can_fake_write (int frame) const
 717 {
 718         /* We have to do a proper write of the first frame so that we can set up the JPEG2000
 719            parameters in the asset writer.
 720         */
 721         return (frame != 0 && frame < _first_nonexistant_frame);
 722 }
 723
 724 void
 725 Writer::write (PlayerSubtitles subs)
 726 {
 727         if (subs.text.empty ()) {
 728                 return;
 729         }
 730
 731         if (!_subtitle_asset) {
 732                 string lang = _film->subtitle_language ();
 733                 if (lang.empty ()) {
 734                         lang = "Unknown";
 735                 }
 736                 if (_film->interop ()) {
 737                         shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
 738                         s->set_movie_title (_film->name ());
 739                         s->set_language (lang);
 740                         s->set_reel_number ("1");
 741                         _subtitle_asset = s;
 742                 } else {
 743                         shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
 744                         s->set_content_title_text (_film->name ());
 745                         s->set_language (lang);
 746                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
 747                         s->set_time_code_rate (_film->video_frame_rate ());
 748                         _subtitle_asset = s;
 749                 }
 750         }
 751
 752         for (list<dcp::SubtitleString>::const_iterator i = subs.text.begin(); i != subs.text.end(); ++i) {
 753                 _subtitle_asset->add (*i);
 754         }
 755 }
 756
 757 void
 758 Writer::write (list<shared_ptr<Font> > fonts)
 759 {
 760         /* Just keep a list of fonts and we'll deal with them in ::finish */
 761         copy (fonts.begin (), fonts.end (), back_inserter (_fonts));
 762 }
 763
 764 bool
 765 operator< (QueueItem const & a, QueueItem const & b)
 766 {
 767         if (a.frame != b.frame) {
 768                 return a.frame < b.frame;
 769         }
 770
 771         return static_cast<int> (a.eyes) < static_cast<int> (b.eyes);
 772 }
 773
 774 bool
 775 operator== (QueueItem const & a, QueueItem const & b)
 776 {
 777         return a.frame == b.frame && a.eyes == b.eyes;
 778 }
 779
 780 void
 781 Writer::set_encoder_threads (int threads)
 782 {
 783         _maximum_frames_in_memory = lrint (threads * 1.1);
 784 }
 785
 786 long
 787 Writer::frame_info_position (int frame, Eyes eyes) const
 788 {
 789         static int const info_size = 48;
 790
 791         switch (eyes) {
 792         case EYES_BOTH:
 793                 return frame * info_size;
 794         case EYES_LEFT:
 795                 return frame * info_size * 2;
 796         case EYES_RIGHT:
 797                 return frame * info_size * 2 + info_size;
 798         default:
 799                 DCPOMATIC_ASSERT (false);
 800         }
 801
 802         DCPOMATIC_ASSERT (false);
 803 }
 804
 805 dcp::FrameInfo
 806 Writer::read_frame_info (FILE* file, int frame, Eyes eyes) const
 807 {
 808         dcp::FrameInfo info;
 809         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 810         fread (&info.offset, sizeof (info.offset), 1, file);
 811         fread (&info.size, sizeof (info.size), 1, file);
 812
 813         char hash_buffer[33];
 814         fread (hash_buffer, 1, 32, file);
 815         hash_buffer[32] = '\0';
 816         info.hash = hash_buffer;
 817
 818         return info;
 819 }