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 "encoded_data.h"
  34 #include "version.h"
  35 #include "font.h"
  36 #include "util.h"
  37 #include <dcp/mono_picture_mxf.h>
  38 #include <dcp/stereo_picture_mxf.h>
  39 #include <dcp/sound_mxf.h>
  40 #include <dcp/sound_mxf_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/signer.h>
  49 #include <dcp/interop_subtitle_content.h>
  50 #include <dcp/font.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_TIMING(...) _film->log()->microsecond_log (String::compose (__VA_ARGS__), Log::TYPE_TIMING);
  59 #define LOG_WARNING_NC(...) _film->log()->log (__VA_ARGS__, Log::TYPE_WARNING);
  60 #define LOG_WARNING(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_WARNING);
  61 #define LOG_ERROR(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_ERROR);
  62 #define LOG_DEBUG(...) _film->log()->log (String::compose (__VA_ARGS__), Log::TYPE_DEBUG);
  63 #define LOG_DEBUG_NC(...) _film->log()->log (__VA_ARGS__, Log::TYPE_DEBUG);
  64
  65 /* OS X strikes again */
  66 #undef set_key
  67
  68 using std::make_pair;
  69 using std::pair;
  70 using std::string;
  71 using std::list;
  72 using std::cout;
  73 using boost::shared_ptr;
  74 using boost::weak_ptr;
  75 using boost::dynamic_pointer_cast;
  76
  77 Writer::Writer (shared_ptr<const Film> f, weak_ptr<Job> j)
  78         : _film (f)
  79         , _job (j)
  80         , _first_nonexistant_frame (0)
  81         , _thread (0)
  82         , _finish (false)
  83         , _queued_full_in_memory (0)
  84         , _last_written_frame (-1)
  85         , _last_written_eyes (EYES_RIGHT)
  86         , _maximum_frames_in_memory (0)
  87         , _full_written (0)
  88         , _fake_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_mxf.reset (new dcp::StereoPictureMXF (dcp::Fraction (_film->video_frame_rate (), 1)));
 104         } else {
 105                 _picture_mxf.reset (new dcp::MonoPictureMXF (dcp::Fraction (_film->video_frame_rate (), 1)));
 106         }
 107
 108         _picture_mxf->set_size (_film->frame_size ());
 109
 110         if (_film->encrypted ()) {
 111                 _picture_mxf->set_key (_film->key ());
 112         }
 113
 114         _picture_mxf_writer = _picture_mxf->start_write (
 115                 _film->internal_video_mxf_dir() / _film->internal_video_mxf_filename(),
 116                 _film->interop() ? dcp::INTEROP : dcp::SMPTE,
 117                 _first_nonexistant_frame > 0
 118                 );
 119
 120         if (_film->audio_channels ()) {
 121                 _sound_mxf.reset (new dcp::SoundMXF (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels ()));
 122
 123                 if (_film->encrypted ()) {
 124                         _sound_mxf->set_key (_film->key ());
 125                 }
 126
 127                 /* Write the sound MXF into the film directory so that we leave the creation
 128                    of the DCP directory until the last minute.
 129                 */
 130                 _sound_mxf_writer = _sound_mxf->start_write (_film->directory() / audio_mxf_filename (_sound_mxf), _film->interop() ? dcp::INTEROP : dcp::SMPTE);
 131         }
 132
 133         /* Check that the signer is OK if we need one */
 134         if (_film->is_signed() && !Config::instance()->signer()->valid ()) {
 135                 throw InvalidSignerError ();
 136         }
 137
 138         job->sub (_("Checking existing image data"));
 139         check_existing_picture_mxf ();
 140
 141         _thread = new boost::thread (boost::bind (&Writer::thread, this));
 142
 143         job->sub (_("Encoding image data"));
 144 }
 145
 146 Writer::~Writer ()
 147 {
 148         terminate_thread (false);
 149 }
 150
 151 void
 152 Writer::write (shared_ptr<const EncodedData> encoded, int frame, Eyes eyes)
 153 {
 154         boost::mutex::scoped_lock lock (_mutex);
 155
 156         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 157                 /* The queue is too big; wait until that is sorted out */
 158                 _full_condition.wait (lock);
 159         }
 160
 161         QueueItem qi;
 162         qi.type = QueueItem::FULL;
 163         qi.encoded = encoded;
 164         qi.frame = frame;
 165
 166         if (_film->three_d() && eyes == EYES_BOTH) {
 167                 /* 2D material in a 3D DCP; fake the 3D */
 168                 qi.eyes = EYES_LEFT;
 169                 _queue.push_back (qi);
 170                 ++_queued_full_in_memory;
 171                 qi.eyes = EYES_RIGHT;
 172                 _queue.push_back (qi);
 173                 ++_queued_full_in_memory;
 174         } else {
 175                 qi.eyes = eyes;
 176                 _queue.push_back (qi);
 177                 ++_queued_full_in_memory;
 178         }
 179
 180         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 181         _empty_condition.notify_all ();
 182 }
 183
 184 void
 185 Writer::fake_write (int frame, Eyes eyes)
 186 {
 187         boost::mutex::scoped_lock lock (_mutex);
 188
 189         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 190                 /* The queue is too big; wait until that is sorted out */
 191                 _full_condition.wait (lock);
 192         }
 193
 194         FILE* file = fopen_boost (_film->info_file (), "rb");
 195         if (!file) {
 196                 throw ReadFileError (_film->info_file ());
 197         }
 198         dcp::FrameInfo info = read_frame_info (file, frame, eyes);
 199         fclose (file);
 200
 201         QueueItem qi;
 202         qi.type = QueueItem::FAKE;
 203         qi.size = info.size;
 204         qi.frame = frame;
 205         if (_film->three_d() && eyes == EYES_BOTH) {
 206                 qi.eyes = EYES_LEFT;
 207                 _queue.push_back (qi);
 208                 qi.eyes = EYES_RIGHT;
 209                 _queue.push_back (qi);
 210         } else {
 211                 qi.eyes = eyes;
 212                 _queue.push_back (qi);
 213         }
 214
 215         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 216         _empty_condition.notify_all ();
 217 }
 218
 219 /** This method is not thread safe */
 220 void
 221 Writer::write (shared_ptr<const AudioBuffers> audio)
 222 {
 223         if (_sound_mxf_writer) {
 224                 _sound_mxf_writer->write (audio->data(), audio->frames());
 225         }
 226 }
 227
 228 /** This must be called from Writer::thread() with an appropriate lock held */
 229 bool
 230 Writer::have_sequenced_image_at_queue_head ()
 231 {
 232         if (_queue.empty ()) {
 233                 return false;
 234         }
 235
 236         _queue.sort ();
 237
 238         /* The queue should contain only EYES_LEFT/EYES_RIGHT pairs or EYES_BOTH */
 239
 240         if (_queue.front().eyes == EYES_BOTH) {
 241                 /* 2D */
 242                 return _queue.front().frame == (_last_written_frame + 1);
 243         }
 244
 245         /* 3D */
 246
 247         if (_last_written_eyes == EYES_LEFT && _queue.front().frame == _last_written_frame && _queue.front().eyes == EYES_RIGHT) {
 248                 return true;
 249         }
 250
 251         if (_last_written_eyes == EYES_RIGHT && _queue.front().frame == (_last_written_frame + 1) && _queue.front().eyes == EYES_LEFT) {
 252                 return true;
 253         }
 254
 255         return false;
 256 }
 257
 258 void
 259 Writer::thread ()
 260 try
 261 {
 262         while (true)
 263         {
 264                 boost::mutex::scoped_lock lock (_mutex);
 265
 266                 /* This is for debugging only */
 267                 bool done_something = false;
 268
 269                 while (true) {
 270
 271                         if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
 272                                 /* We've got something to do: go and do it */
 273                                 break;
 274                         }
 275
 276                         /* Nothing to do: wait until something happens which may indicate that we do */
 277                         LOG_TIMING (N_("writer sleeps with a queue of %1"), _queue.size());
 278                         _empty_condition.wait (lock);
 279                         LOG_TIMING (N_("writer wakes with a queue of %1"), _queue.size());
 280                 }
 281
 282                 if (_finish && _queue.empty()) {
 283                         return;
 284                 }
 285
 286                 /* We stop here if we have been asked to finish, and if either the queue
 287                    is empty or we do not have a sequenced image at its head (if this is the
 288                    case we will never terminate as no new frames will be sent once
 289                    _finish is true).
 290                 */
 291                 if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
 292                         done_something = true;
 293                         /* (Hopefully temporarily) log anything that was not written */
 294                         if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
 295                                 LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
 296                                 for (list<QueueItem>::const_iterator i = _queue.begin(); i != _queue.end(); ++i) {
 297                                         if (i->type == QueueItem::FULL) {
 298                                                 LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i->frame, i->eyes);
 299                                         } else {
 300                                                 LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i->size, i->frame, i->eyes);
 301                                         }
 302                                 }
 303                                 LOG_WARNING (N_("Last written frame %1, last written eyes %2"), _last_written_frame, _last_written_eyes);
 304                         }
 305                         return;
 306                 }
 307                 /* Write any frames that we can write; i.e. those that are in sequence. */
 308                 while (have_sequenced_image_at_queue_head ()) {
 309                         done_something = true;
 310                         QueueItem qi = _queue.front ();
 311                         _queue.pop_front ();
 312                         if (qi.type == QueueItem::FULL && qi.encoded) {
 313                                 --_queued_full_in_memory;
 314                         }
 315
 316                         lock.unlock ();
 317                         switch (qi.type) {
 318                         case QueueItem::FULL:
 319                         {
 320                                 LOG_GENERAL (N_("Writer FULL-writes %1 to MXF"), qi.frame);
 321                                 if (!qi.encoded) {
 322                                         qi.encoded.reset (new EncodedData (_film->j2c_path (qi.frame, qi.eyes, false)));
 323                                 }
 324
 325                                 dcp::FrameInfo fin = _picture_mxf_writer->write (qi.encoded->data(), qi.encoded->size());
 326                                 qi.encoded->write_info (_film, qi.frame, qi.eyes, fin);
 327                                 _last_written[qi.eyes] = qi.encoded;
 328                                 ++_full_written;
 329                                 break;
 330                         }
 331                         case QueueItem::FAKE:
 332                                 LOG_GENERAL (N_("Writer FAKE-writes %1 to MXF"), qi.frame);
 333                                 _picture_mxf_writer->fake_write (qi.size);
 334                                 _last_written[qi.eyes].reset ();
 335                                 ++_fake_written;
 336                                 break;
 337                         }
 338                         lock.lock ();
 339
 340                         _last_written_frame = qi.frame;
 341                         _last_written_eyes = qi.eyes;
 342
 343                         shared_ptr<Job> job = _job.lock ();
 344                         DCPOMATIC_ASSERT (job);
 345                         int64_t total = _film->length().frames (_film->video_frame_rate ());
 346                         if (_film->three_d ()) {
 347                                 /* _full_written and so on are incremented for each eye, so we need to double the total
 348                                    frames to get the correct progress.
 349                                 */
 350                                 total *= 2;
 351                         }
 352                         if (total) {
 353                                 job->set_progress (float (_full_written + _fake_written) / total);
 354                         }
 355                 }
 356
 357                 while (_queued_full_in_memory > _maximum_frames_in_memory) {
 358                         done_something = true;
 359                         /* Too many frames in memory which can't yet be written to the stream.
 360                            Write some FULL frames to disk.
 361                         */
 362
 363                         /* Find one from the back of the queue */
 364                         _queue.sort ();
 365                         list<QueueItem>::reverse_iterator i = _queue.rbegin ();
 366                         while (i != _queue.rend() && (i->type != QueueItem::FULL || !i->encoded)) {
 367                                 ++i;
 368                         }
 369
 370                         DCPOMATIC_ASSERT (i != _queue.rend());
 371                         ++_pushed_to_disk;
 372                         lock.unlock ();
 373
 374                         /* i is valid here, even though we don't hold a lock on the mutex,
 375                            since list iterators are unaffected by insertion and only this
 376                            thread could erase the last item in the list.
 377                         */
 378
 379                         LOG_GENERAL (
 380                                 "Writer full (awaiting %1 [last eye was %2]); pushes %3 to disk",
 381                                 _last_written_frame + 1,
 382                                 _last_written_eyes, i->frame
 383                                 );
 384
 385                         i->encoded->write (_film, i->frame, i->eyes);
 386
 387                         lock.lock ();
 388                         i->encoded.reset ();
 389                         --_queued_full_in_memory;
 390                 }
 391
 392                 if (!done_something) {
 393                         LOG_DEBUG_NC ("Writer loop ran without doing anything");
 394                         LOG_DEBUG ("_queued_full_in_memory=%1", _queued_full_in_memory);
 395                         LOG_DEBUG ("_queue_size=%1", _queue.size ());
 396                         LOG_DEBUG ("_finish=%1", _finish);
 397                         LOG_DEBUG ("_last_written_frame=%1", _last_written_frame);
 398                 }
 399
 400                 /* The queue has probably just gone down a bit; notify anything wait()ing on _full_condition */
 401                 _full_condition.notify_all ();
 402         }
 403 }
 404 catch (...)
 405 {
 406         store_current ();
 407 }
 408
 409 void
 410 Writer::terminate_thread (bool can_throw)
 411 {
 412         boost::mutex::scoped_lock lock (_mutex);
 413         if (_thread == 0) {
 414                 return;
 415         }
 416
 417         _finish = true;
 418         _empty_condition.notify_all ();
 419         _full_condition.notify_all ();
 420         lock.unlock ();
 421
 422         _thread->join ();
 423         if (can_throw) {
 424                 rethrow ();
 425         }
 426
 427         delete _thread;
 428         _thread = 0;
 429 }
 430
 431 void
 432 Writer::finish ()
 433 {
 434         if (!_thread) {
 435                 return;
 436         }
 437
 438         terminate_thread (true);
 439
 440         _picture_mxf_writer->finalize ();
 441         if (_sound_mxf_writer) {
 442                 _sound_mxf_writer->finalize ();
 443         }
 444
 445         /* Hard-link the video MXF into the DCP */
 446         boost::filesystem::path video_from = _picture_mxf->file ();
 447
 448         boost::filesystem::path video_to;
 449         video_to /= _film->dir (_film->dcp_name());
 450         video_to /= video_mxf_filename (_picture_mxf);
 451
 452         boost::system::error_code ec;
 453         boost::filesystem::create_hard_link (video_from, video_to, ec);
 454         if (ec) {
 455                 LOG_WARNING_NC ("Hard-link failed; copying instead");
 456                 boost::filesystem::copy_file (video_from, video_to, ec);
 457                 if (ec) {
 458                         LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
 459                         throw FileError (ec.message(), video_from);
 460                 }
 461         }
 462
 463         _picture_mxf->set_file (video_to);
 464
 465         /* Move the audio MXF into the DCP */
 466
 467         if (_sound_mxf) {
 468                 boost::filesystem::path audio_to;
 469                 audio_to /= _film->dir (_film->dcp_name ());
 470                 audio_to /= audio_mxf_filename (_sound_mxf);
 471
 472                 boost::filesystem::rename (_film->file (audio_mxf_filename (_sound_mxf)), audio_to, ec);
 473                 if (ec) {
 474                         throw FileError (
 475                                 String::compose (_("could not move audio MXF into the DCP (%1)"), ec.value ()), audio_mxf_filename (_sound_mxf)
 476                                 );
 477                 }
 478
 479                 _sound_mxf->set_file (audio_to);
 480         }
 481
 482         dcp::DCP dcp (_film->dir (_film->dcp_name()));
 483
 484         shared_ptr<dcp::CPL> cpl (
 485                 new dcp::CPL (
 486                         _film->dcp_name(),
 487                         _film->dcp_content_type()->libdcp_kind ()
 488                         )
 489                 );
 490
 491         dcp.add (cpl);
 492
 493         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
 494
 495         shared_ptr<dcp::MonoPictureMXF> mono = dynamic_pointer_cast<dcp::MonoPictureMXF> (_picture_mxf);
 496         if (mono) {
 497                 reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelMonoPictureAsset (mono, 0)));
 498                 dcp.add (mono);
 499         }
 500
 501         shared_ptr<dcp::StereoPictureMXF> stereo = dynamic_pointer_cast<dcp::StereoPictureMXF> (_picture_mxf);
 502         if (stereo) {
 503                 reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelStereoPictureAsset (stereo, 0)));
 504                 dcp.add (stereo);
 505         }
 506
 507         if (_sound_mxf) {
 508                 reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_mxf, 0)));
 509                 dcp.add (_sound_mxf);
 510         }
 511
 512         if (_subtitle_content) {
 513                 boost::filesystem::path const liberation = shared_path () / "LiberationSans-Regular.ttf";
 514
 515                 /* Add all the fonts to the subtitle content and as assets to the DCP */
 516                 BOOST_FOREACH (shared_ptr<Font> i, _fonts) {
 517                         boost::filesystem::path const from = i->file.get_value_or (liberation);
 518                         _subtitle_content->add_font (i->id, from.leaf().string ());
 519
 520                         boost::filesystem::path to = _film->dir (_film->dcp_name ()) / _subtitle_content->id ();
 521                         boost::filesystem::create_directories (to, ec);
 522                         if (ec) {
 523                                 throw FileError (_("Could not create directory"), to);
 524                         }
 525
 526                         to /= from.leaf();
 527
 528                         boost::system::error_code ec;
 529                         boost::filesystem::copy_file (from, to, ec);
 530                         if (ec) {
 531                                 throw FileError ("Could not copy font to DCP", from);
 532                         }
 533
 534                         dcp.add (shared_ptr<dcp::Font> (new dcp::Font (to)));
 535                 }
 536
 537                 _subtitle_content->write_xml (_film->dir (_film->dcp_name ()) / _subtitle_content->id () / subtitle_content_filename (_subtitle_content));
 538                 reel->add (shared_ptr<dcp::ReelSubtitleAsset> (
 539                                    new dcp::ReelSubtitleAsset (
 540                                            _subtitle_content,
 541                                            dcp::Fraction (_film->video_frame_rate(), 1),
 542                                            _picture_mxf->intrinsic_duration (),
 543                                            0
 544                                            )
 545                                    ));
 546
 547                 dcp.add (_subtitle_content);
 548         }
 549
 550         cpl->add (reel);
 551
 552         shared_ptr<Job> job = _job.lock ();
 553         DCPOMATIC_ASSERT (job);
 554
 555         job->sub (_("Computing image digest"));
 556         _picture_mxf->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
 557
 558         if (_sound_mxf) {
 559                 job->sub (_("Computing audio digest"));
 560                 _sound_mxf->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
 561         }
 562
 563         dcp::XMLMetadata meta;
 564         meta.issuer = Config::instance()->dcp_issuer ();
 565         meta.creator = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 566         meta.set_issue_date_now ();
 567
 568         shared_ptr<const dcp::Signer> signer;
 569         if (_film->is_signed ()) {
 570                 signer = Config::instance()->signer ();
 571                 /* We did check earlier, but check again here to be on the safe side */
 572                 if (!signer->valid ()) {
 573                         throw InvalidSignerError ();
 574                 }
 575         }
 576
 577         dcp.write_xml (_film->interop () ? dcp::INTEROP : dcp::SMPTE, meta, signer);
 578
 579         LOG_GENERAL (
 580                 N_("Wrote %1 FULL, %2 FAKE, %3 pushed to disk"), _full_written, _fake_written, _pushed_to_disk
 581                 );
 582 }
 583
 584 bool
 585 Writer::check_existing_picture_mxf_frame (FILE* mxf, int f, Eyes eyes)
 586 {
 587         /* Read the frame info as written */
 588         FILE* file = fopen_boost (_film->info_file (), "rb");
 589         if (!file) {
 590                 LOG_GENERAL ("Existing frame %1 has no info file", f);
 591                 return false;
 592         }
 593
 594         dcp::FrameInfo info = read_frame_info (file, f, eyes);
 595         fclose (file);
 596         if (info.size == 0) {
 597                 LOG_GENERAL ("Existing frame %1 has no info file", f);
 598                 return false;
 599         }
 600
 601         /* Read the data from the MXF and hash it */
 602         dcpomatic_fseek (mxf, info.offset, SEEK_SET);
 603         EncodedData data (info.size);
 604         size_t const read = fread (data.data(), 1, data.size(), mxf);
 605         if (read != static_cast<size_t> (data.size ())) {
 606                 LOG_GENERAL ("Existing frame %1 is incomplete", f);
 607                 return false;
 608         }
 609
 610         MD5Digester digester;
 611         digester.add (data.data(), data.size());
 612         if (digester.get() != info.hash) {
 613                 LOG_GENERAL ("Existing frame %1 failed hash check", f);
 614                 return false;
 615         }
 616
 617         return true;
 618 }
 619
 620 void
 621 Writer::check_existing_picture_mxf ()
 622 {
 623         /* Try to open the existing MXF */
 624         FILE* mxf = fopen_boost (_picture_mxf->file(), "rb");
 625         if (!mxf) {
 626                 LOG_GENERAL ("Could not open existing MXF at %1 (errno=%2)", _picture_mxf->file().string(), errno);
 627                 return;
 628         }
 629
 630         while (true) {
 631
 632                 shared_ptr<Job> job = _job.lock ();
 633                 DCPOMATIC_ASSERT (job);
 634
 635                 job->set_progress_unknown ();
 636
 637                 if (_film->three_d ()) {
 638                         if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_LEFT)) {
 639                                 break;
 640                         }
 641                         if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_RIGHT)) {
 642                                 break;
 643                         }
 644                 } else {
 645                         if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_BOTH)) {
 646                                 break;
 647                         }
 648                 }
 649
 650                 LOG_GENERAL ("Have existing frame %1", _first_nonexistant_frame);
 651                 ++_first_nonexistant_frame;
 652         }
 653
 654         fclose (mxf);
 655 }
 656
 657 /** @param frame Frame index.
 658  *  @return true if we can fake-write this frame.
 659  */
 660 bool
 661 Writer::can_fake_write (int frame) const
 662 {
 663         /* We have to do a proper write of the first frame so that we can set up the JPEG2000
 664            parameters in the MXF writer.
 665         */
 666         return (frame != 0 && frame < _first_nonexistant_frame);
 667 }
 668
 669 void
 670 Writer::write (PlayerSubtitles subs)
 671 {
 672         if (subs.text.empty ()) {
 673                 return;
 674         }
 675
 676         if (!_subtitle_content) {
 677                 string lang = _film->subtitle_language ();
 678                 if (lang.empty ()) {
 679                         lang = "Unknown";
 680                 }
 681                 _subtitle_content.reset (new dcp::InteropSubtitleContent (_film->name(), lang));
 682         }
 683
 684         for (list<dcp::SubtitleString>::const_iterator i = subs.text.begin(); i != subs.text.end(); ++i) {
 685                 _subtitle_content->add (*i);
 686         }
 687 }
 688
 689 void
 690 Writer::write (list<shared_ptr<Font> > fonts)
 691 {
 692         /* Just keep a list of fonts and we'll deal with them in ::finish */
 693         copy (fonts.begin (), fonts.end (), back_inserter (_fonts));
 694 }
 695
 696 bool
 697 operator< (QueueItem const & a, QueueItem const & b)
 698 {
 699         if (a.frame != b.frame) {
 700                 return a.frame < b.frame;
 701         }
 702
 703         return static_cast<int> (a.eyes) < static_cast<int> (b.eyes);
 704 }
 705
 706 bool
 707 operator== (QueueItem const & a, QueueItem const & b)
 708 {
 709         return a.frame == b.frame && a.eyes == b.eyes;
 710 }
 711
 712 void
 713 Writer::set_encoder_threads (int threads)
 714 {
 715         _maximum_frames_in_memory = rint (threads * 1.1);
 716 }