src/lib/writer.cc

   1 /*
   2     Copyright (C) 2012-2017 Carl Hetherington <cth@carlh.net>
   3
   4     This file is part of DCP-o-matic.
   5
   6     DCP-o-matic is free software; you can redistribute it and/or modify
   7     it under the terms of the GNU General Public License as published by
   8     the Free Software Foundation; either version 2 of the License, or
   9     (at your option) any later version.
  10
  11     DCP-o-matic is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14     GNU General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with DCP-o-matic.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "writer.h"
  22 #include "compose.hpp"
  23 #include "film.h"
  24 #include "ratio.h"
  25 #include "log.h"
  26 #include "dcp_video.h"
  27 #include "dcp_content_type.h"
  28 #include "audio_mapping.h"
  29 #include "config.h"
  30 #include "job.h"
  31 #include "cross.h"
  32 #include "audio_buffers.h"
  33 #include "version.h"
  34 #include "font.h"
  35 #include "util.h"
  36 #include "reel_writer.h"
  37 #include <dcp/cpl.h>
  38 #include <dcp/locale_convert.h>
  39 #include <boost/foreach.hpp>
  40 #include <fstream>
  41 #include <cerrno>
  42 #include <iostream>
  43 #include <cfloat>
  44
  45 #include "i18n.h"
  46
  47 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
  48 #define LOG_GENERAL_NC(...) _film->log()->log (__VA_ARGS__, LogEntry::TYPE_GENERAL);
  49 #define LOG_DEBUG_ENCODE(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_DEBUG_ENCODE);
  50 #define LOG_TIMING(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_TIMING);
  51 #define LOG_WARNING_NC(...) _film->log()->log (__VA_ARGS__, LogEntry::TYPE_WARNING);
  52 #define LOG_WARNING(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_WARNING);
  53 #define LOG_ERROR(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_ERROR);
  54
  55 /* OS X strikes again */
  56 #undef set_key
  57
  58 using std::make_pair;
  59 using std::pair;
  60 using std::string;
  61 using std::list;
  62 using std::cout;
  63 using std::map;
  64 using std::min;
  65 using std::max;
  66 using boost::shared_ptr;
  67 using boost::weak_ptr;
  68 using boost::dynamic_pointer_cast;
  69 using dcp::Data;
  70
  71 Writer::Writer (shared_ptr<const Film> film, weak_ptr<Job> j)
  72         : _film (film)
  73         , _job (j)
  74         , _thread (0)
  75         , _finish (false)
  76         , _queued_full_in_memory (0)
  77         , _maximum_frames_in_memory (0)
  78         , _maximum_queue_size (0)
  79         , _full_written (0)
  80         , _fake_written (0)
  81         , _repeat_written (0)
  82         , _pushed_to_disk (0)
  83 {
  84         shared_ptr<Job> job = _job.lock ();
  85         DCPOMATIC_ASSERT (job);
  86
  87         int reel_index = 0;
  88         list<DCPTimePeriod> const reels = _film->reels ();
  89         BOOST_FOREACH (DCPTimePeriod p, reels) {
  90                 _reels.push_back (ReelWriter (film, p, job, reel_index++, reels.size(), _film->content_summary(p)));
  91         }
  92
  93         /* We can keep track of the current audio and subtitle reels easily because audio
  94            and subs arrive to the Writer in sequence.  This is not so for video.
  95         */
  96         _audio_reel = _reels.begin ();
  97         _subtitle_reel = _reels.begin ();
  98
  99         /* Check that the signer is OK if we need one */
 100         string reason;
 101         if (_film->is_signed() && !Config::instance()->signer_chain()->valid(&reason)) {
 102                 throw InvalidSignerError (reason);
 103         }
 104 }
 105
 106 void
 107 Writer::start ()
 108 {
 109         _thread = new boost::thread (boost::bind (&Writer::thread, this));
 110 #ifdef DCPOMATIC_LINUX
 111         pthread_setname_np (_thread->native_handle(), "writer");
 112 #endif
 113 }
 114
 115 Writer::~Writer ()
 116 {
 117         terminate_thread (false);
 118 }
 119
 120 /** Pass a video frame to the writer for writing to disk at some point.
 121  *  This method can be called with frames out of order.
 122  *  @param encoded JPEG2000-encoded data.
 123  *  @param frame Frame index within the DCP.
 124  *  @param eyes Eyes that this frame image is for.
 125  */
 126 void
 127 Writer::write (Data encoded, Frame frame, Eyes eyes)
 128 {
 129         boost::mutex::scoped_lock lock (_state_mutex);
 130
 131         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 132                 /* There are too many full frames in memory; wait until that is sorted out */
 133                 _full_condition.wait (lock);
 134         }
 135
 136         QueueItem qi;
 137         qi.type = QueueItem::FULL;
 138         qi.encoded = encoded;
 139         qi.reel = video_reel (frame);
 140         qi.frame = frame - _reels[qi.reel].start ();
 141
 142         if (_film->three_d() && eyes == EYES_BOTH) {
 143                 /* 2D material in a 3D DCP; fake the 3D */
 144                 qi.eyes = EYES_LEFT;
 145                 _queue.push_back (qi);
 146                 ++_queued_full_in_memory;
 147                 qi.eyes = EYES_RIGHT;
 148                 _queue.push_back (qi);
 149                 ++_queued_full_in_memory;
 150         } else {
 151                 qi.eyes = eyes;
 152                 _queue.push_back (qi);
 153                 ++_queued_full_in_memory;
 154         }
 155
 156         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 157         _empty_condition.notify_all ();
 158 }
 159
 160 bool
 161 Writer::can_repeat (Frame frame) const
 162 {
 163         return frame > _reels[video_reel(frame)].start();
 164 }
 165
 166 /** Repeat the last frame that was written to a reel as a new frame.
 167  *  @param frame Frame index within the DCP of the new (repeated) frame.
 168  *  @param eyes Eyes that this repeated frame image is for.
 169  */
 170 void
 171 Writer::repeat (Frame frame, Eyes eyes)
 172 {
 173         boost::mutex::scoped_lock lock (_state_mutex);
 174
 175         while (_queue.size() > _maximum_queue_size) {
 176                 /* The queue is too big; wait until that is sorted out */
 177                 _full_condition.wait (lock);
 178         }
 179
 180         QueueItem qi;
 181         qi.type = QueueItem::REPEAT;
 182         qi.reel = video_reel (frame);
 183         qi.frame = frame - _reels[qi.reel].start ();
 184         if (_film->three_d() && eyes == EYES_BOTH) {
 185                 qi.eyes = EYES_LEFT;
 186                 _queue.push_back (qi);
 187                 qi.eyes = EYES_RIGHT;
 188                 _queue.push_back (qi);
 189         } else {
 190                 qi.eyes = eyes;
 191                 _queue.push_back (qi);
 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::fake_write (Frame frame, Eyes eyes)
 200 {
 201         boost::mutex::scoped_lock lock (_state_mutex);
 202
 203         while (_queue.size() > _maximum_queue_size) {
 204                 /* The queue is too big; wait until that is sorted out */
 205                 _full_condition.wait (lock);
 206         }
 207
 208         size_t const reel = video_reel (frame);
 209         Frame const reel_frame = frame - _reels[reel].start ();
 210
 211         FILE* file = fopen_boost (_film->info_file(_reels[reel].period()), "rb");
 212         if (!file) {
 213                 throw ReadFileError (_film->info_file(_reels[reel].period()));
 214         }
 215         dcp::FrameInfo info = _reels[reel].read_frame_info (file, reel_frame, eyes);
 216         fclose (file);
 217
 218         QueueItem qi;
 219         qi.type = QueueItem::FAKE;
 220         qi.size = info.size;
 221         qi.reel = reel;
 222         qi.frame = reel_frame;
 223         if (_film->three_d() && eyes == EYES_BOTH) {
 224                 qi.eyes = EYES_LEFT;
 225                 _queue.push_back (qi);
 226                 qi.eyes = EYES_RIGHT;
 227                 _queue.push_back (qi);
 228         } else {
 229                 qi.eyes = eyes;
 230                 _queue.push_back (qi);
 231         }
 232
 233         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 234         _empty_condition.notify_all ();
 235 }
 236
 237 /** Write some audio frames to the DCP.
 238  *  @param audio Audio data.
 239  *  @param time Time of this data within the DCP.
 240  *  This method is not thread safe.
 241  */
 242 void
 243 Writer::write (shared_ptr<const AudioBuffers> audio, DCPTime const time)
 244 {
 245         DCPOMATIC_ASSERT (audio);
 246
 247         int const afr = _film->audio_frame_rate();
 248
 249         DCPTime const end = time + DCPTime::from_frames(audio->frames(), afr);
 250
 251         /* The audio we get might span a reel boundary, and if so we have to write it in bits */
 252
 253         DCPTime t = time;
 254         while (t < end) {
 255
 256                 if (_audio_reel == _reels.end ()) {
 257                         /* This audio is off the end of the last reel; ignore it */
 258                         return;
 259                 }
 260
 261                 if (end <= _audio_reel->period().to) {
 262                         /* Easy case: we can write all the audio to this reel */
 263                         _audio_reel->write (audio);
 264                         t = end;
 265                 } else {
 266                         /* Split the audio into two and write the first part */
 267                         DCPTime part_lengths[2] = {
 268                                 _audio_reel->period().to - t,
 269                                 end - _audio_reel->period().to
 270                         };
 271
 272                         Frame part_frames[2] = {
 273                                 part_lengths[0].frames_ceil(afr),
 274                                 part_lengths[1].frames_ceil(afr)
 275                         };
 276
 277                         if (part_frames[0]) {
 278                                 shared_ptr<AudioBuffers> part (new AudioBuffers (audio->channels(), part_frames[0]));
 279                                 part->copy_from (audio.get(), part_frames[0], 0, 0);
 280                                 _audio_reel->write (part);
 281                         }
 282
 283                         if (part_frames[1]) {
 284                                 shared_ptr<AudioBuffers> part (new AudioBuffers (audio->channels(), part_frames[1]));
 285                                 part->copy_from (audio.get(), part_frames[1], part_frames[0], 0);
 286                                 audio = part;
 287                         } else {
 288                                 audio.reset ();
 289                         }
 290
 291                         ++_audio_reel;
 292                         t += part_lengths[0];
 293                 }
 294         }
 295 }
 296
 297 /** This must be called from Writer::thread() with an appropriate lock held */
 298 bool
 299 Writer::have_sequenced_image_at_queue_head ()
 300 {
 301         if (_queue.empty ()) {
 302                 return false;
 303         }
 304
 305         _queue.sort ();
 306
 307         QueueItem const & f = _queue.front();
 308         ReelWriter const & reel = _reels[f.reel];
 309
 310         /* The queue should contain only EYES_LEFT/EYES_RIGHT pairs or EYES_BOTH */
 311
 312         if (f.eyes == EYES_BOTH) {
 313                 /* 2D */
 314                 return f.frame == (reel.last_written_video_frame() + 1);
 315         }
 316
 317         /* 3D */
 318
 319         if (reel.last_written_eyes() == EYES_LEFT && f.frame == reel.last_written_video_frame() && f.eyes == EYES_RIGHT) {
 320                 return true;
 321         }
 322
 323         if (reel.last_written_eyes() == EYES_RIGHT && f.frame == (reel.last_written_video_frame() + 1) && f.eyes == EYES_LEFT) {
 324                 return true;
 325         }
 326
 327         return false;
 328 }
 329
 330 void
 331 Writer::thread ()
 332 try
 333 {
 334         while (true)
 335         {
 336                 boost::mutex::scoped_lock lock (_state_mutex);
 337
 338                 while (true) {
 339
 340                         if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
 341                                 /* We've got something to do: go and do it */
 342                                 break;
 343                         }
 344
 345                         /* Nothing to do: wait until something happens which may indicate that we do */
 346                         LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
 347                         _empty_condition.wait (lock);
 348                         LOG_TIMING (N_("writer-wake queue=%1"), _queue.size());
 349                 }
 350
 351                 if (_finish && _queue.empty()) {
 352                         return;
 353                 }
 354
 355                 /* We stop here if we have been asked to finish, and if either the queue
 356                    is empty or we do not have a sequenced image at its head (if this is the
 357                    case we will never terminate as no new frames will be sent once
 358                    _finish is true).
 359                 */
 360                 if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
 361                         /* (Hopefully temporarily) log anything that was not written */
 362                         if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
 363                                 LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
 364                                 for (list<QueueItem>::const_iterator i = _queue.begin(); i != _queue.end(); ++i) {
 365                                         if (i->type == QueueItem::FULL) {
 366                                                 LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i->frame, (int) i->eyes);
 367                                         } else {
 368                                                 LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i->size, i->frame, (int) i->eyes);
 369                                         }
 370                                 }
 371                         }
 372                         return;
 373                 }
 374
 375                 /* Write any frames that we can write; i.e. those that are in sequence. */
 376                 while (have_sequenced_image_at_queue_head ()) {
 377                         QueueItem qi = _queue.front ();
 378                         _queue.pop_front ();
 379                         if (qi.type == QueueItem::FULL && qi.encoded) {
 380                                 --_queued_full_in_memory;
 381                         }
 382
 383                         lock.unlock ();
 384
 385                         ReelWriter& reel = _reels[qi.reel];
 386
 387                         switch (qi.type) {
 388                         case QueueItem::FULL:
 389                                 LOG_DEBUG_ENCODE (N_("Writer FULL-writes %1 (%2)"), qi.frame, (int) qi.eyes);
 390                                 if (!qi.encoded) {
 391                                         qi.encoded = Data (_film->j2c_path (qi.reel, qi.frame, qi.eyes, false));
 392                                 }
 393                                 reel.write (qi.encoded, qi.frame, qi.eyes);
 394                                 ++_full_written;
 395                                 break;
 396                         case QueueItem::FAKE:
 397                                 LOG_DEBUG_ENCODE (N_("Writer FAKE-writes %1"), qi.frame);
 398                                 reel.fake_write (qi.frame, qi.eyes, qi.size);
 399                                 ++_fake_written;
 400                                 break;
 401                         case QueueItem::REPEAT:
 402                                 LOG_DEBUG_ENCODE (N_("Writer REPEAT-writes %1"), qi.frame);
 403                                 reel.repeat_write (qi.frame, qi.eyes);
 404                                 ++_repeat_written;
 405                                 break;
 406                         }
 407
 408                         lock.lock ();
 409                         _full_condition.notify_all ();
 410                 }
 411
 412                 while (_queued_full_in_memory > _maximum_frames_in_memory) {
 413                         /* Too many frames in memory which can't yet be written to the stream.
 414                            Write some FULL frames to disk.
 415                         */
 416
 417                         /* Find one from the back of the queue */
 418                         _queue.sort ();
 419                         list<QueueItem>::reverse_iterator i = _queue.rbegin ();
 420                         while (i != _queue.rend() && (i->type != QueueItem::FULL || !i->encoded)) {
 421                                 ++i;
 422                         }
 423
 424                         DCPOMATIC_ASSERT (i != _queue.rend());
 425                         ++_pushed_to_disk;
 426                         /* For the log message below */
 427                         int const awaiting = _reels[_queue.front().reel].last_written_video_frame();
 428                         lock.unlock ();
 429
 430                         /* i is valid here, even though we don't hold a lock on the mutex,
 431                            since list iterators are unaffected by insertion and only this
 432                            thread could erase the last item in the list.
 433                         */
 434
 435                         LOG_GENERAL ("Writer full; pushes %1 to disk while awaiting %2", i->frame, awaiting);
 436
 437                         i->encoded->write_via_temp (
 438                                 _film->j2c_path (i->reel, i->frame, i->eyes, true),
 439                                 _film->j2c_path (i->reel, i->frame, i->eyes, false)
 440                                 );
 441
 442                         lock.lock ();
 443                         i->encoded.reset ();
 444                         --_queued_full_in_memory;
 445                         _full_condition.notify_all ();
 446                 }
 447         }
 448 }
 449 catch (...)
 450 {
 451         store_current ();
 452 }
 453
 454 void
 455 Writer::terminate_thread (bool can_throw)
 456 {
 457         boost::mutex::scoped_lock lock (_state_mutex);
 458         if (_thread == 0) {
 459                 return;
 460         }
 461
 462         _finish = true;
 463         _empty_condition.notify_all ();
 464         _full_condition.notify_all ();
 465         lock.unlock ();
 466
 467         if (_thread->joinable ()) {
 468                 _thread->join ();
 469         }
 470
 471         if (can_throw) {
 472                 rethrow ();
 473         }
 474
 475         delete _thread;
 476         _thread = 0;
 477 }
 478
 479 void
 480 Writer::finish ()
 481 {
 482         if (!_thread) {
 483                 return;
 484         }
 485
 486         LOG_GENERAL_NC ("Terminating writer thread");
 487
 488         terminate_thread (true);
 489
 490         LOG_GENERAL_NC ("Finishing ReelWriters");
 491
 492         BOOST_FOREACH (ReelWriter& i, _reels) {
 493                 i.finish ();
 494         }
 495
 496         LOG_GENERAL_NC ("Writing XML");
 497
 498         dcp::DCP dcp (_film->dir (_film->dcp_name()));
 499
 500         shared_ptr<dcp::CPL> cpl (
 501                 new dcp::CPL (
 502                         _film->dcp_name(),
 503                         _film->dcp_content_type()->libdcp_kind ()
 504                         )
 505                 );
 506
 507         dcp.add (cpl);
 508
 509         /* Calculate digests for each reel in parallel */
 510
 511         shared_ptr<Job> job = _job.lock ();
 512         job->sub (_("Computing digests"));
 513
 514         boost::asio::io_service service;
 515         boost::thread_group pool;
 516
 517         shared_ptr<boost::asio::io_service::work> work (new boost::asio::io_service::work (service));
 518
 519         int const threads = max (1, Config::instance()->master_encoding_threads ());
 520
 521         for (int i = 0; i < threads; ++i) {
 522                 pool.create_thread (boost::bind (&boost::asio::io_service::run, &service));
 523         }
 524
 525         BOOST_FOREACH (ReelWriter& i, _reels) {
 526                 boost::function<void (float)> set_progress = boost::bind (&Writer::set_digest_progress, this, job.get(), _1);
 527                 service.post (boost::bind (&ReelWriter::calculate_digests, &i, set_progress));
 528         }
 529
 530         work.reset ();
 531         pool.join_all ();
 532         service.stop ();
 533
 534         /* Add reels to CPL */
 535
 536         BOOST_FOREACH (ReelWriter& i, _reels) {
 537                 cpl->add (i.create_reel (_reel_assets, _fonts));
 538         }
 539
 540         dcp::XMLMetadata meta;
 541         meta.annotation_text = cpl->annotation_text ();
 542         meta.creator = Config::instance()->dcp_creator ();
 543         if (meta.creator.empty ()) {
 544                 meta.creator = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 545         }
 546         meta.issuer = Config::instance()->dcp_issuer ();
 547         if (meta.issuer.empty ()) {
 548                 meta.issuer = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 549         }
 550         meta.set_issue_date_now ();
 551
 552         cpl->set_metadata (meta);
 553
 554         shared_ptr<const dcp::CertificateChain> signer;
 555         if (_film->is_signed ()) {
 556                 signer = Config::instance()->signer_chain ();
 557                 /* We did check earlier, but check again here to be on the safe side */
 558                 string reason;
 559                 if (!signer->valid (&reason)) {
 560                         throw InvalidSignerError (reason);
 561                 }
 562         }
 563
 564         dcp.write_xml (_film->interop () ? dcp::INTEROP : dcp::SMPTE, meta, signer, Config::instance()->dcp_metadata_filename_format());
 565
 566         LOG_GENERAL (
 567                 N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT, %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk
 568                 );
 569
 570         write_cover_sheet ();
 571 }
 572
 573 void
 574 Writer::write_cover_sheet ()
 575 {
 576         boost::filesystem::path const cover = _film->file ("COVER_SHEET.txt");
 577         FILE* f = fopen_boost (cover, "w");
 578         if (!f) {
 579                 throw OpenFileError (cover, errno, false);
 580         }
 581
 582         string text = Config::instance()->cover_sheet ();
 583         boost::algorithm::replace_all (text, "$CPL_NAME", _film->name());
 584         boost::algorithm::replace_all (text, "$TYPE", _film->dcp_content_type()->pretty_name());
 585         boost::algorithm::replace_all (text, "$CONTAINER", _film->container()->container_nickname());
 586         boost::algorithm::replace_all (text, "$AUDIO_LANGUAGE", _film->isdcf_metadata().audio_language);
 587         boost::algorithm::replace_all (text, "$SUBTITLE_LANGUAGE", _film->isdcf_metadata().subtitle_language);
 588
 589         boost::uintmax_t size = 0;
 590         for (
 591                 boost::filesystem::recursive_directory_iterator i = boost::filesystem::recursive_directory_iterator(_film->dir(_film->dcp_name()));
 592                 i != boost::filesystem::recursive_directory_iterator();
 593                 ++i) {
 594                 if (boost::filesystem::is_regular_file (i->path ())) {
 595                         size += boost::filesystem::file_size (i->path ());
 596                 }
 597         }
 598
 599         if (size > (1000000000L)) {
 600                 boost::algorithm::replace_all (text, "$SIZE", String::compose ("%1GB", dcp::locale_convert<string> (size / 1000000000.0, 1, true)));
 601         } else {
 602                 boost::algorithm::replace_all (text, "$SIZE", String::compose ("%1MB", dcp::locale_convert<string> (size / 1000000.0, 1, true)));
 603         }
 604
 605         pair<int, int> ch = audio_channel_types (_film->mapped_audio_channels(), _film->audio_channels());
 606         string description = String::compose("%1.%2", ch.first, ch.second);
 607
 608         if (description == "0.0") {
 609                 description = _("None");
 610         } else if (description == "1.0") {
 611                 description = _("Mono");
 612         } else if (description == "2.0") {
 613                 description = _("Stereo");
 614         }
 615         boost::algorithm::replace_all (text, "$AUDIO", description);
 616
 617         int h, m, s, fr;
 618         _film->length().split (_film->video_frame_rate(), h, m, s, fr);
 619         string length;
 620         if (h == 0 && m == 0) {
 621                 length = String::compose("%1s", s);
 622         } else if (h == 0 && m > 0) {
 623                 length = String::compose("%1m%2s", m, s);
 624         } else if (h > 0 && m > 0) {
 625                 length = String::compose("%1h%2m%3s", h, m, s);
 626         }
 627
 628         boost::algorithm::replace_all (text, "$LENGTH", length);
 629
 630         fwrite (text.c_str(), 1, text.length(), f);
 631         fclose (f);
 632 }
 633
 634 /** @param frame Frame index within the whole DCP.
 635  *  @return true if we can fake-write this frame.
 636  */
 637 bool
 638 Writer::can_fake_write (Frame frame) const
 639 {
 640         if (_film->encrypted()) {
 641                 /* We need to re-write the frame because the asset ID is embedded in the HMAC... I think... */
 642                 return false;
 643         }
 644
 645         /* We have to do a proper write of the first frame so that we can set up the JPEG2000
 646            parameters in the asset writer.
 647         */
 648
 649         ReelWriter const & reel = _reels[video_reel(frame)];
 650
 651         /* Make frame relative to the start of the reel */
 652         frame -= reel.start ();
 653         return (frame != 0 && frame < reel.first_nonexistant_frame());
 654 }
 655
 656 void
 657 Writer::write (PlayerSubtitles subs, DCPTimePeriod period)
 658 {
 659         if (subs.text.empty ()) {
 660                 return;
 661         }
 662
 663         while (_subtitle_reel->period().to <= period.from) {
 664                 ++_subtitle_reel;
 665                 DCPOMATIC_ASSERT (_subtitle_reel != _reels.end());
 666         }
 667
 668         DCPOMATIC_ASSERT (_subtitle_reel != _reels.end());
 669
 670         _subtitle_reel->write (subs);
 671 }
 672
 673 void
 674 Writer::write (list<shared_ptr<Font> > fonts)
 675 {
 676         /* Just keep a list of unique fonts and we'll deal with them in ::finish */
 677
 678         BOOST_FOREACH (shared_ptr<Font> i, fonts) {
 679                 bool got = false;
 680                 BOOST_FOREACH (shared_ptr<Font> j, _fonts) {
 681                         if (*i == *j) {
 682                                 got = true;
 683                         }
 684                 }
 685
 686                 if (!got) {
 687                         _fonts.push_back (i);
 688                 }
 689         }
 690 }
 691
 692 bool
 693 operator< (QueueItem const & a, QueueItem const & b)
 694 {
 695         if (a.reel != b.reel) {
 696                 return a.reel < b.reel;
 697         }
 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.reel == b.reel && 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 = lrint (threads * Config::instance()->frames_in_memory_multiplier());
 716         _maximum_queue_size = lrint (threads * 16);
 717 }
 718
 719 void
 720 Writer::write (ReferencedReelAsset asset)
 721 {
 722         _reel_assets.push_back (asset);
 723 }
 724
 725 size_t
 726 Writer::video_reel (int frame) const
 727 {
 728         DCPTime t = DCPTime::from_frames (frame, _film->video_frame_rate ());
 729         size_t i = 0;
 730         while (i < _reels.size() && !_reels[i].period().contains (t)) {
 731                 ++i;
 732         }
 733
 734         DCPOMATIC_ASSERT (i < _reels.size ());
 735         return i;
 736 }
 737
 738 void
 739 Writer::set_digest_progress (Job* job, float progress)
 740 {
 741         /* I believe this is thread-safe */
 742         _digest_progresses[boost::this_thread::get_id()] = progress;
 743
 744         boost::mutex::scoped_lock lm (_digest_progresses_mutex);
 745         float min_progress = FLT_MAX;
 746         for (map<boost::thread::id, float>::const_iterator i = _digest_progresses.begin(); i != _digest_progresses.end(); ++i) {
 747                 min_progress = min (min_progress, i->second);
 748         }
 749
 750         job->set_progress (min_progress);
 751 }