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         /* Do this last; if something after this line were to throw an exception
 153            (say if Job::sub was interrupted by cancel) this thread would never
 154            get properly cleaned up but the Writer object would go away underneath
 155            it.
 156         */
 157         _thread = new boost::thread (boost::bind (&Writer::thread, this));
 158 }
 159
 160 Writer::~Writer ()
 161 {
 162         terminate_thread (false);
 163 }
 164
 165 void
 166 Writer::write (Data encoded, int frame, Eyes eyes)
 167 {
 168         boost::mutex::scoped_lock lock (_state_mutex);
 169
 170         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 171                 /* The queue is too big; wait until that is sorted out */
 172                 _full_condition.wait (lock);
 173         }
 174
 175         QueueItem qi;
 176         qi.type = QueueItem::FULL;
 177         qi.encoded = encoded;
 178         qi.frame = frame;
 179
 180         if (_film->three_d() && eyes == EYES_BOTH) {
 181                 /* 2D material in a 3D DCP; fake the 3D */
 182                 qi.eyes = EYES_LEFT;
 183                 _queue.push_back (qi);
 184                 ++_queued_full_in_memory;
 185                 qi.eyes = EYES_RIGHT;
 186                 _queue.push_back (qi);
 187                 ++_queued_full_in_memory;
 188         } else {
 189                 qi.eyes = eyes;
 190                 _queue.push_back (qi);
 191                 ++_queued_full_in_memory;
 192         }
 193
 194         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 195         _empty_condition.notify_all ();
 196 }
 197
 198 void
 199 Writer::repeat (int frame, Eyes eyes)
 200 {
 201         boost::mutex::scoped_lock lock (_state_mutex);
 202
 203         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 204                 /* The queue is too big; wait until that is sorted out */
 205                 _full_condition.wait (lock);
 206         }
 207
 208         QueueItem qi;
 209         qi.type = QueueItem::REPEAT;
 210         qi.frame = frame;
 211         if (_film->three_d() && eyes == EYES_BOTH) {
 212                 qi.eyes = EYES_LEFT;
 213                 _queue.push_back (qi);
 214                 qi.eyes = EYES_RIGHT;
 215                 _queue.push_back (qi);
 216         } else {
 217                 qi.eyes = eyes;
 218                 _queue.push_back (qi);
 219         }
 220
 221         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 222         _empty_condition.notify_all ();
 223 }
 224
 225 void
 226 Writer::fake_write (int frame, Eyes eyes)
 227 {
 228         boost::mutex::scoped_lock lock (_state_mutex);
 229
 230         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 231                 /* The queue is too big; wait until that is sorted out */
 232                 _full_condition.wait (lock);
 233         }
 234
 235         FILE* file = fopen_boost (_film->info_file (), "rb");
 236         if (!file) {
 237                 throw ReadFileError (_film->info_file ());
 238         }
 239         dcp::FrameInfo info = read_frame_info (file, frame, eyes);
 240         fclose (file);
 241
 242         QueueItem qi;
 243         qi.type = QueueItem::FAKE;
 244         qi.size = info.size;
 245         qi.frame = frame;
 246         if (_film->three_d() && eyes == EYES_BOTH) {
 247                 qi.eyes = EYES_LEFT;
 248                 _queue.push_back (qi);
 249                 qi.eyes = EYES_RIGHT;
 250                 _queue.push_back (qi);
 251         } else {
 252                 qi.eyes = eyes;
 253                 _queue.push_back (qi);
 254         }
 255
 256         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 257         _empty_condition.notify_all ();
 258 }
 259
 260 /** This method is not thread safe */
 261 void
 262 Writer::write (shared_ptr<const AudioBuffers> audio)
 263 {
 264         if (_sound_asset_writer) {
 265                 _sound_asset_writer->write (audio->data(), audio->frames());
 266         }
 267 }
 268
 269 /** This must be called from Writer::thread() with an appropriate lock held */
 270 bool
 271 Writer::have_sequenced_image_at_queue_head ()
 272 {
 273         if (_queue.empty ()) {
 274                 return false;
 275         }
 276
 277         _queue.sort ();
 278
 279         /* The queue should contain only EYES_LEFT/EYES_RIGHT pairs or EYES_BOTH */
 280
 281         if (_queue.front().eyes == EYES_BOTH) {
 282                 /* 2D */
 283                 return _queue.front().frame == (_last_written_frame + 1);
 284         }
 285
 286         /* 3D */
 287
 288         if (_last_written_eyes == EYES_LEFT && _queue.front().frame == _last_written_frame && _queue.front().eyes == EYES_RIGHT) {
 289                 return true;
 290         }
 291
 292         if (_last_written_eyes == EYES_RIGHT && _queue.front().frame == (_last_written_frame + 1) && _queue.front().eyes == EYES_LEFT) {
 293                 return true;
 294         }
 295
 296         return false;
 297 }
 298
 299 void
 300 Writer::write_frame_info (int frame, Eyes eyes, dcp::FrameInfo info) const
 301 {
 302         FILE* file = 0;
 303         if (boost::filesystem::exists (_film->info_file ())) {
 304                 file = fopen_boost (_film->info_file(), "r+b");
 305         } else {
 306                 file = fopen_boost (_film->info_file(), "wb");
 307         }
 308         if (!file) {
 309                 throw OpenFileError (_film->info_file ());
 310         }
 311         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 312         fwrite (&info.offset, sizeof (info.offset), 1, file);
 313         fwrite (&info.size, sizeof (info.size), 1, file);
 314         fwrite (info.hash.c_str(), 1, info.hash.size(), file);
 315         fclose (file);
 316 }
 317
 318 void
 319 Writer::thread ()
 320 try
 321 {
 322         while (true)
 323         {
 324                 boost::mutex::scoped_lock lock (_state_mutex);
 325
 326                 while (true) {
 327
 328                         if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
 329                                 /* We've got something to do: go and do it */
 330                                 break;
 331                         }
 332
 333                         /* Nothing to do: wait until something happens which may indicate that we do */
 334                         LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
 335                         _empty_condition.wait (lock);
 336                         LOG_TIMING (N_("writer-wake queue=%1"), _queue.size());
 337                 }
 338
 339                 if (_finish && _queue.empty()) {
 340                         return;
 341                 }
 342
 343                 /* We stop here if we have been asked to finish, and if either the queue
 344                    is empty or we do not have a sequenced image at its head (if this is the
 345                    case we will never terminate as no new frames will be sent once
 346                    _finish is true).
 347                 */
 348                 if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
 349                         /* (Hopefully temporarily) log anything that was not written */
 350                         if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
 351                                 LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
 352                                 for (list<QueueItem>::const_iterator i = _queue.begin(); i != _queue.end(); ++i) {
 353                                         if (i->type == QueueItem::FULL) {
 354                                                 LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i->frame, i->eyes);
 355                                         } else {
 356                                                 LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i->size, i->frame, i->eyes);
 357                                         }
 358                                 }
 359                                 LOG_WARNING (N_("Last written frame %1, last written eyes %2"), _last_written_frame, _last_written_eyes);
 360                         }
 361                         return;
 362                 }
 363                 /* Write any frames that we can write; i.e. those that are in sequence. */
 364                 while (have_sequenced_image_at_queue_head ()) {
 365                         QueueItem qi = _queue.front ();
 366                         _queue.pop_front ();
 367                         if (qi.type == QueueItem::FULL && qi.encoded) {
 368                                 --_queued_full_in_memory;
 369                         }
 370
 371                         lock.unlock ();
 372                         switch (qi.type) {
 373                         case QueueItem::FULL:
 374                         {
 375                                 LOG_DEBUG_ENCODE (N_("Writer FULL-writes %1 (%2)"), qi.frame, qi.eyes);
 376                                 if (!qi.encoded) {
 377                                         qi.encoded = Data (_film->j2c_path (qi.frame, qi.eyes, false));
 378                                 }
 379
 380                                 dcp::FrameInfo fin = _picture_asset_writer->write (qi.encoded->data().get (), qi.encoded->size());
 381                                 write_frame_info (qi.frame, qi.eyes, fin);
 382                                 _last_written[qi.eyes] = qi.encoded;
 383                                 ++_full_written;
 384                                 break;
 385                         }
 386                         case QueueItem::FAKE:
 387                                 LOG_DEBUG_ENCODE (N_("Writer FAKE-writes %1"), qi.frame);
 388                                 _picture_asset_writer->fake_write (qi.size);
 389                                 _last_written[qi.eyes].reset ();
 390                                 ++_fake_written;
 391                                 break;
 392                         case QueueItem::REPEAT:
 393                                 LOG_DEBUG_ENCODE (N_("Writer REPEAT-writes %1"), qi.frame);
 394                                 dcp::FrameInfo fin = _picture_asset_writer->write (
 395                                         _last_written[qi.eyes]->data().get(),
 396                                         _last_written[qi.eyes]->size()
 397                                         );
 398                                 write_frame_info (qi.frame, qi.eyes, fin);
 399                                 ++_repeat_written;
 400                                 break;
 401                         }
 402                         lock.lock ();
 403
 404                         _last_written_frame = qi.frame;
 405                         _last_written_eyes = qi.eyes;
 406
 407                         shared_ptr<Job> job = _job.lock ();
 408                         DCPOMATIC_ASSERT (job);
 409                         int64_t total = _film->length().frames_round (_film->video_frame_rate ());
 410                         if (_film->three_d ()) {
 411                                 /* _full_written and so on are incremented for each eye, so we need to double the total
 412                                    frames to get the correct progress.
 413                                 */
 414                                 total *= 2;
 415                         }
 416                         if (total) {
 417                                 job->set_progress (float (_full_written + _fake_written + _repeat_written) / total);
 418                         }
 419                 }
 420
 421                 while (_queued_full_in_memory > _maximum_frames_in_memory) {
 422                         /* Too many frames in memory which can't yet be written to the stream.
 423                            Write some FULL frames to disk.
 424                         */
 425
 426                         /* Find one from the back of the queue */
 427                         _queue.sort ();
 428                         list<QueueItem>::reverse_iterator i = _queue.rbegin ();
 429                         while (i != _queue.rend() && (i->type != QueueItem::FULL || !i->encoded)) {
 430                                 ++i;
 431                         }
 432
 433                         DCPOMATIC_ASSERT (i != _queue.rend());
 434                         ++_pushed_to_disk;
 435                         lock.unlock ();
 436
 437                         /* i is valid here, even though we don't hold a lock on the mutex,
 438                            since list iterators are unaffected by insertion and only this
 439                            thread could erase the last item in the list.
 440                         */
 441
 442                         LOG_GENERAL (
 443                                 "Writer full (awaiting %1 [last eye was %2]); pushes %3 to disk",
 444                                 _last_written_frame + 1,
 445                                 _last_written_eyes, i->frame
 446                                 );
 447
 448                         i->encoded->write_via_temp (_film->j2c_path (i->frame, i->eyes, true), _film->j2c_path (i->frame, i->eyes, false));
 449
 450                         lock.lock ();
 451                         i->encoded.reset ();
 452                         --_queued_full_in_memory;
 453                 }
 454
 455                 /* The queue has probably just gone down a bit; notify anything wait()ing on _full_condition */
 456                 _full_condition.notify_all ();
 457         }
 458 }
 459 catch (...)
 460 {
 461         store_current ();
 462 }
 463
 464 void
 465 Writer::terminate_thread (bool can_throw)
 466 {
 467         boost::mutex::scoped_lock lock (_state_mutex);
 468         if (_thread == 0) {
 469                 return;
 470         }
 471
 472         _finish = true;
 473         _empty_condition.notify_all ();
 474         _full_condition.notify_all ();
 475         lock.unlock ();
 476
 477         _thread->join ();
 478         if (can_throw) {
 479                 rethrow ();
 480         }
 481
 482         delete _thread;
 483         _thread = 0;
 484 }
 485
 486 void
 487 Writer::finish ()
 488 {
 489         if (!_thread) {
 490                 return;
 491         }
 492
 493         terminate_thread (true);
 494
 495         _picture_asset_writer->finalize ();
 496         if (_sound_asset_writer) {
 497                 _sound_asset_writer->finalize ();
 498         }
 499
 500         /* Hard-link the video asset into the DCP */
 501         boost::filesystem::path video_from = _picture_asset->file ();
 502
 503         boost::filesystem::path video_to;
 504         video_to /= _film->dir (_film->dcp_name());
 505         video_to /= video_asset_filename (_picture_asset);
 506
 507         boost::system::error_code ec;
 508         boost::filesystem::create_hard_link (video_from, video_to, ec);
 509         if (ec) {
 510                 LOG_WARNING_NC ("Hard-link failed; copying instead");
 511                 boost::filesystem::copy_file (video_from, video_to, ec);
 512                 if (ec) {
 513                         LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
 514                         throw FileError (ec.message(), video_from);
 515                 }
 516         }
 517
 518         _picture_asset->set_file (video_to);
 519
 520         /* Move the audio asset into the DCP */
 521
 522         if (_sound_asset) {
 523                 boost::filesystem::path audio_to;
 524                 audio_to /= _film->dir (_film->dcp_name ());
 525                 audio_to /= audio_asset_filename (_sound_asset);
 526
 527                 boost::filesystem::rename (_film->file (audio_asset_filename (_sound_asset)), audio_to, ec);
 528                 if (ec) {
 529                         throw FileError (
 530                                 String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), audio_asset_filename (_sound_asset)
 531                                 );
 532                 }
 533
 534                 _sound_asset->set_file (audio_to);
 535         }
 536
 537         dcp::DCP dcp (_film->dir (_film->dcp_name()));
 538
 539         shared_ptr<dcp::CPL> cpl (
 540                 new dcp::CPL (
 541                         _film->dcp_name(),
 542                         _film->dcp_content_type()->libdcp_kind ()
 543                         )
 544                 );
 545
 546         dcp.add (cpl);
 547
 548         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
 549
 550         shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
 551         if (mono) {
 552                 reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelMonoPictureAsset (mono, 0)));
 553         }
 554
 555         shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
 556         if (stereo) {
 557                 reel->add (shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelStereoPictureAsset (stereo, 0)));
 558         }
 559
 560         if (_sound_asset) {
 561                 reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_asset, 0)));
 562         }
 563
 564         if (_subtitle_asset) {
 565                 boost::filesystem::path liberation;
 566                 try {
 567                         liberation = shared_path () / "LiberationSans-Regular.ttf";
 568                 } catch (boost::filesystem::filesystem_error& e) {
 569                         /* Hack: try the debian/ubuntu location if getting the shared path failed */
 570                         liberation = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
 571                 }
 572
 573                 /* Add all the fonts to the subtitle content */
 574                 BOOST_FOREACH (shared_ptr<Font> i, _fonts) {
 575                         _subtitle_asset->add_font (i->id(), i->file().get_value_or (liberation));
 576                 }
 577
 578                 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (_subtitle_asset)) {
 579                         boost::filesystem::path directory = _film->dir (_film->dcp_name ()) / _subtitle_asset->id ();
 580                         boost::filesystem::create_directories (directory);
 581                         _subtitle_asset->write (directory / ("sub_" + _subtitle_asset->id() + ".xml"));
 582                 } else {
 583                         _subtitle_asset->write (
 584                                 _film->dir (_film->dcp_name ()) / ("sub_" + _subtitle_asset->id() + ".mxf")
 585                                 );
 586                 }
 587
 588                 reel->add (shared_ptr<dcp::ReelSubtitleAsset> (
 589                                    new dcp::ReelSubtitleAsset (
 590                                            _subtitle_asset,
 591                                            dcp::Fraction (_film->video_frame_rate(), 1),
 592                                            _picture_asset->intrinsic_duration (),
 593                                            0
 594                                            )
 595                                    ));
 596         }
 597
 598         cpl->add (reel);
 599
 600         shared_ptr<Job> job = _job.lock ();
 601         DCPOMATIC_ASSERT (job);
 602
 603         job->sub (_("Computing image digest"));
 604         _picture_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
 605
 606         if (_sound_asset) {
 607                 job->sub (_("Computing audio digest"));
 608                 _sound_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
 609         }
 610
 611         dcp::XMLMetadata meta;
 612         meta.creator = Config::instance()->dcp_creator ();
 613         if (meta.creator.empty ()) {
 614                 meta.creator = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 615         }
 616         meta.issuer = Config::instance()->dcp_issuer ();
 617         if (meta.issuer.empty ()) {
 618                 meta.issuer = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 619         }
 620         meta.set_issue_date_now ();
 621
 622         cpl->set_metadata (meta);
 623
 624         shared_ptr<const dcp::CertificateChain> signer;
 625         if (_film->is_signed ()) {
 626                 signer = Config::instance()->signer_chain ();
 627                 /* We did check earlier, but check again here to be on the safe side */
 628                 if (!signer->valid ()) {
 629                         throw InvalidSignerError ();
 630                 }
 631         }
 632
 633         dcp.write_xml (_film->interop () ? dcp::INTEROP : dcp::SMPTE, meta, signer);
 634
 635         LOG_GENERAL (
 636                 N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT, %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk
 637                 );
 638 }
 639
 640 bool
 641 Writer::check_existing_picture_asset_frame (FILE* asset, int f, Eyes eyes)
 642 {
 643         /* Read the frame info as written */
 644         FILE* file = fopen_boost (_film->info_file (), "rb");
 645         if (!file) {
 646                 LOG_GENERAL ("Existing frame %1 has no info file", f);
 647                 return false;
 648         }
 649
 650         dcp::FrameInfo info = read_frame_info (file, f, eyes);
 651         fclose (file);
 652         if (info.size == 0) {
 653                 LOG_GENERAL ("Existing frame %1 has no info file", f);
 654                 return false;
 655         }
 656
 657         /* Read the data from the asset and hash it */
 658         dcpomatic_fseek (asset, info.offset, SEEK_SET);
 659         Data data (info.size);
 660         size_t const read = fread (data.data().get(), 1, data.size(), asset);
 661         if (read != static_cast<size_t> (data.size ())) {
 662                 LOG_GENERAL ("Existing frame %1 is incomplete", f);
 663                 return false;
 664         }
 665
 666         MD5Digester digester;
 667         digester.add (data.data().get(), data.size());
 668         if (digester.get() != info.hash) {
 669                 LOG_GENERAL ("Existing frame %1 failed hash check", f);
 670                 return false;
 671         }
 672
 673         return true;
 674 }
 675
 676 void
 677 Writer::check_existing_picture_asset ()
 678 {
 679         /* Try to open the existing asset */
 680         FILE* asset = fopen_boost (_picture_asset->file(), "rb");
 681         if (!asset) {
 682                 LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", _picture_asset->file().string(), errno);
 683                 return;
 684         }
 685
 686         while (true) {
 687
 688                 shared_ptr<Job> job = _job.lock ();
 689                 DCPOMATIC_ASSERT (job);
 690
 691                 job->set_progress_unknown ();
 692
 693                 if (_film->three_d ()) {
 694                         if (!check_existing_picture_asset_frame (asset, _first_nonexistant_frame, EYES_LEFT)) {
 695                                 break;
 696                         }
 697                         if (!check_existing_picture_asset_frame (asset, _first_nonexistant_frame, EYES_RIGHT)) {
 698                                 break;
 699                         }
 700                 } else {
 701                         if (!check_existing_picture_asset_frame (asset, _first_nonexistant_frame, EYES_BOTH)) {
 702                                 break;
 703                         }
 704                 }
 705
 706                 LOG_DEBUG_ENCODE ("Have existing frame %1", _first_nonexistant_frame);
 707                 ++_first_nonexistant_frame;
 708         }
 709
 710         fclose (asset);
 711 }
 712
 713 /** @param frame Frame index.
 714  *  @return true if we can fake-write this frame.
 715  */
 716 bool
 717 Writer::can_fake_write (int frame) const
 718 {
 719         /* We have to do a proper write of the first frame so that we can set up the JPEG2000
 720            parameters in the asset writer.
 721         */
 722         return (frame != 0 && frame < _first_nonexistant_frame);
 723 }
 724
 725 void
 726 Writer::write (PlayerSubtitles subs)
 727 {
 728         if (subs.text.empty ()) {
 729                 return;
 730         }
 731
 732         if (!_subtitle_asset) {
 733                 string lang = _film->subtitle_language ();
 734                 if (lang.empty ()) {
 735                         lang = "Unknown";
 736                 }
 737                 if (_film->interop ()) {
 738                         shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
 739                         s->set_movie_title (_film->name ());
 740                         s->set_language (lang);
 741                         s->set_reel_number ("1");
 742                         _subtitle_asset = s;
 743                 } else {
 744                         shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
 745                         s->set_content_title_text (_film->name ());
 746                         s->set_language (lang);
 747                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
 748                         s->set_time_code_rate (_film->video_frame_rate ());
 749                         _subtitle_asset = s;
 750                 }
 751         }
 752
 753         for (list<dcp::SubtitleString>::const_iterator i = subs.text.begin(); i != subs.text.end(); ++i) {
 754                 _subtitle_asset->add (*i);
 755         }
 756 }
 757
 758 void
 759 Writer::write (list<shared_ptr<Font> > fonts)
 760 {
 761         /* Just keep a list of fonts and we'll deal with them in ::finish */
 762         copy (fonts.begin (), fonts.end (), back_inserter (_fonts));
 763 }
 764
 765 bool
 766 operator< (QueueItem const & a, QueueItem const & b)
 767 {
 768         if (a.frame != b.frame) {
 769                 return a.frame < b.frame;
 770         }
 771
 772         return static_cast<int> (a.eyes) < static_cast<int> (b.eyes);
 773 }
 774
 775 bool
 776 operator== (QueueItem const & a, QueueItem const & b)
 777 {
 778         return a.frame == b.frame && a.eyes == b.eyes;
 779 }
 780
 781 void
 782 Writer::set_encoder_threads (int threads)
 783 {
 784         _maximum_frames_in_memory = lrint (threads * 1.1);
 785 }
 786
 787 long
 788 Writer::frame_info_position (int frame, Eyes eyes) const
 789 {
 790         static int const info_size = 48;
 791
 792         switch (eyes) {
 793         case EYES_BOTH:
 794                 return frame * info_size;
 795         case EYES_LEFT:
 796                 return frame * info_size * 2;
 797         case EYES_RIGHT:
 798                 return frame * info_size * 2 + info_size;
 799         default:
 800                 DCPOMATIC_ASSERT (false);
 801         }
 802
 803         DCPOMATIC_ASSERT (false);
 804 }
 805
 806 dcp::FrameInfo
 807 Writer::read_frame_info (FILE* file, int frame, Eyes eyes) const
 808 {
 809         dcp::FrameInfo info;
 810         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
 811         fread (&info.offset, sizeof (info.offset), 1, file);
 812         fread (&info.size, sizeof (info.size), 1, file);
 813
 814         char hash_buffer[33];
 815         fread (hash_buffer, 1, 32, file);
 816         hash_buffer[32] = '\0';
 817         info.hash = hash_buffer;
 818
 819         return info;
 820 }