src/lib/writer.cc

   1 /*
   2     Copyright (C) 2012-2016 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 <boost/foreach.hpp>
  39 #include <fstream>
  40 #include <cerrno>
  41 #include <iostream>
  42 #include <cfloat>
  43
  44 #include "i18n.h"
  45
  46 #define LOG_GENERAL(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_GENERAL);
  47 #define LOG_GENERAL_NC(...) _film->log()->log (__VA_ARGS__, LogEntry::TYPE_GENERAL);
  48 #define LOG_DEBUG_ENCODE(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_DEBUG_ENCODE);
  49 #define LOG_TIMING(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_TIMING);
  50 #define LOG_WARNING_NC(...) _film->log()->log (__VA_ARGS__, LogEntry::TYPE_WARNING);
  51 #define LOG_WARNING(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_WARNING);
  52 #define LOG_ERROR(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_ERROR);
  53
  54 /* OS X strikes again */
  55 #undef set_key
  56
  57 using std::make_pair;
  58 using std::pair;
  59 using std::string;
  60 using std::list;
  61 using std::cout;
  62 using std::map;
  63 using std::min;
  64 using std::max;
  65 using boost::shared_ptr;
  66 using boost::weak_ptr;
  67 using boost::dynamic_pointer_cast;
  68 using dcp::Data;
  69
  70 Writer::Writer (shared_ptr<const Film> film, weak_ptr<Job> j)
  71         : _film (film)
  72         , _job (j)
  73         , _thread (0)
  74         , _finish (false)
  75         , _queued_full_in_memory (0)
  76         , _maximum_frames_in_memory (0)
  77         , _full_written (0)
  78         , _fake_written (0)
  79         , _repeat_written (0)
  80         , _pushed_to_disk (0)
  81 {
  82         /* Remove any old DCP */
  83         boost::filesystem::remove_all (_film->dir (_film->dcp_name ()));
  84
  85         shared_ptr<Job> job = _job.lock ();
  86         DCPOMATIC_ASSERT (job);
  87
  88         int reel_index = 0;
  89         list<DCPTimePeriod> const reels = _film->reels ();
  90         BOOST_FOREACH (DCPTimePeriod p, reels) {
  91                 _reels.push_back (ReelWriter (film, p, job, reel_index++, reels.size(), _film->content_summary(p)));
  92         }
  93
  94         /* We can keep track of the current audio and subtitle reels easily because audio
  95            and subs arrive to the Writer in sequence.  This is not so for video.
  96         */
  97         _audio_reel = _reels.begin ();
  98         _subtitle_reel = _reels.begin ();
  99
 100         /* Check that the signer is OK if we need one */
 101         if (_film->is_signed() && !Config::instance()->signer_chain()->valid ()) {
 102                 throw InvalidSignerError ();
 103         }
 104 }
 105
 106 void
 107 Writer::start ()
 108 {
 109         _thread = new boost::thread (boost::bind (&Writer::thread, this));
 110 }
 111
 112 Writer::~Writer ()
 113 {
 114         terminate_thread (false);
 115 }
 116
 117 /** Pass a video frame to the writer for writing to disk at some point.
 118  *  This method can be called with frames out of order.
 119  *  @param encoded JPEG2000-encoded data.
 120  *  @param frame Frame index within the DCP.
 121  *  @param eyes Eyes that this frame image is for.
 122  */
 123 void
 124 Writer::write (Data encoded, Frame frame, Eyes eyes)
 125 {
 126         boost::mutex::scoped_lock lock (_state_mutex);
 127
 128         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 129                 /* The queue is too big; wait until that is sorted out */
 130                 _full_condition.wait (lock);
 131         }
 132
 133         QueueItem qi;
 134         qi.type = QueueItem::FULL;
 135         qi.encoded = encoded;
 136         qi.reel = video_reel (frame);
 137         qi.frame = frame - _reels[qi.reel].start ();
 138
 139         if (_film->three_d() && eyes == EYES_BOTH) {
 140                 /* 2D material in a 3D DCP; fake the 3D */
 141                 qi.eyes = EYES_LEFT;
 142                 _queue.push_back (qi);
 143                 ++_queued_full_in_memory;
 144                 qi.eyes = EYES_RIGHT;
 145                 _queue.push_back (qi);
 146                 ++_queued_full_in_memory;
 147         } else {
 148                 qi.eyes = eyes;
 149                 _queue.push_back (qi);
 150                 ++_queued_full_in_memory;
 151         }
 152
 153         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 154         _empty_condition.notify_all ();
 155 }
 156
 157 bool
 158 Writer::can_repeat (Frame frame) const
 159 {
 160         return frame > _reels[video_reel(frame)].start();
 161 }
 162
 163 /** Repeat the last frame that was written to a reel as a new frame.
 164  *  @param frame Frame index within the DCP of the new (repeated) frame.
 165  *  @param eyes Eyes that this repeated frame image is for.
 166  */
 167 void
 168 Writer::repeat (Frame frame, Eyes eyes)
 169 {
 170         boost::mutex::scoped_lock lock (_state_mutex);
 171
 172         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 173                 /* The queue is too big; wait until that is sorted out */
 174                 _full_condition.wait (lock);
 175         }
 176
 177         QueueItem qi;
 178         qi.type = QueueItem::REPEAT;
 179         qi.reel = video_reel (frame);
 180         qi.frame = frame - _reels[qi.reel].start ();
 181         if (_film->three_d() && eyes == EYES_BOTH) {
 182                 qi.eyes = EYES_LEFT;
 183                 _queue.push_back (qi);
 184                 qi.eyes = EYES_RIGHT;
 185                 _queue.push_back (qi);
 186         } else {
 187                 qi.eyes = eyes;
 188                 _queue.push_back (qi);
 189         }
 190
 191         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 192         _empty_condition.notify_all ();
 193 }
 194
 195 void
 196 Writer::fake_write (Frame frame, Eyes eyes)
 197 {
 198         boost::mutex::scoped_lock lock (_state_mutex);
 199
 200         while (_queued_full_in_memory > _maximum_frames_in_memory) {
 201                 /* The queue is too big; wait until that is sorted out */
 202                 _full_condition.wait (lock);
 203         }
 204
 205         size_t const reel = video_reel (frame);
 206         Frame const reel_frame = frame - _reels[reel].start ();
 207
 208         FILE* file = fopen_boost (_film->info_file(_reels[reel].period()), "rb");
 209         if (!file) {
 210                 throw ReadFileError (_film->info_file(_reels[reel].period()));
 211         }
 212         dcp::FrameInfo info = _reels[reel].read_frame_info (file, reel_frame, eyes);
 213         fclose (file);
 214
 215         QueueItem qi;
 216         qi.type = QueueItem::FAKE;
 217         qi.size = info.size;
 218         qi.reel = reel;
 219         qi.frame = reel_frame;
 220         if (_film->three_d() && eyes == EYES_BOTH) {
 221                 qi.eyes = EYES_LEFT;
 222                 _queue.push_back (qi);
 223                 qi.eyes = EYES_RIGHT;
 224                 _queue.push_back (qi);
 225         } else {
 226                 qi.eyes = eyes;
 227                 _queue.push_back (qi);
 228         }
 229
 230         /* Now there's something to do: wake anything wait()ing on _empty_condition */
 231         _empty_condition.notify_all ();
 232 }
 233
 234 /** Write one video frame's worth of audio frames to the DCP.
 235  *  @param audio Audio data or 0 if there is no audio to be written here (i.e. it is referenced).
 236  *  This method is not thread safe.
 237  */
 238 void
 239 Writer::write (shared_ptr<const AudioBuffers> audio)
 240 {
 241         if (_audio_reel == _reels.end ()) {
 242                 /* This audio is off the end of the last reel; ignore it */
 243                 return;
 244         }
 245
 246         _audio_reel->write (audio);
 247
 248         /* written is in video frames, not audio frames */
 249         if (_audio_reel->total_written_audio_frames() >= _audio_reel->period().duration().frames_floor (_film->video_frame_rate())) {
 250                 ++_audio_reel;
 251         }
 252 }
 253
 254 /** This must be called from Writer::thread() with an appropriate lock held */
 255 bool
 256 Writer::have_sequenced_image_at_queue_head ()
 257 {
 258         if (_queue.empty ()) {
 259                 return false;
 260         }
 261
 262         _queue.sort ();
 263
 264         QueueItem const & f = _queue.front();
 265         ReelWriter const & reel = _reels[f.reel];
 266
 267         /* The queue should contain only EYES_LEFT/EYES_RIGHT pairs or EYES_BOTH */
 268
 269         if (f.eyes == EYES_BOTH) {
 270                 /* 2D */
 271                 return f.frame == (reel.last_written_video_frame() + 1);
 272         }
 273
 274         /* 3D */
 275
 276         if (reel.last_written_eyes() == EYES_LEFT && f.frame == reel.last_written_video_frame() && f.eyes == EYES_RIGHT) {
 277                 return true;
 278         }
 279
 280         if (reel.last_written_eyes() == EYES_RIGHT && f.frame == (reel.last_written_video_frame() + 1) && f.eyes == EYES_LEFT) {
 281                 return true;
 282         }
 283
 284         return false;
 285 }
 286
 287 void
 288 Writer::thread ()
 289 try
 290 {
 291         while (true)
 292         {
 293                 boost::mutex::scoped_lock lock (_state_mutex);
 294
 295                 while (true) {
 296
 297                         if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
 298                                 /* We've got something to do: go and do it */
 299                                 break;
 300                         }
 301
 302                         /* Nothing to do: wait until something happens which may indicate that we do */
 303                         LOG_TIMING (N_("writer-sleep queue=%1"), _queue.size());
 304                         _empty_condition.wait (lock);
 305                         LOG_TIMING (N_("writer-wake queue=%1"), _queue.size());
 306                 }
 307
 308                 if (_finish && _queue.empty()) {
 309                         return;
 310                 }
 311
 312                 /* We stop here if we have been asked to finish, and if either the queue
 313                    is empty or we do not have a sequenced image at its head (if this is the
 314                    case we will never terminate as no new frames will be sent once
 315                    _finish is true).
 316                 */
 317                 if (_finish && (!have_sequenced_image_at_queue_head() || _queue.empty())) {
 318                         /* (Hopefully temporarily) log anything that was not written */
 319                         if (!_queue.empty() && !have_sequenced_image_at_queue_head()) {
 320                                 LOG_WARNING (N_("Finishing writer with a left-over queue of %1:"), _queue.size());
 321                                 for (list<QueueItem>::const_iterator i = _queue.begin(); i != _queue.end(); ++i) {
 322                                         if (i->type == QueueItem::FULL) {
 323                                                 LOG_WARNING (N_("- type FULL, frame %1, eyes %2"), i->frame, (int) i->eyes);
 324                                         } else {
 325                                                 LOG_WARNING (N_("- type FAKE, size %1, frame %2, eyes %3"), i->size, i->frame, (int) i->eyes);
 326                                         }
 327                                 }
 328                         }
 329                         return;
 330                 }
 331
 332                 /* Write any frames that we can write; i.e. those that are in sequence. */
 333                 while (have_sequenced_image_at_queue_head ()) {
 334                         QueueItem qi = _queue.front ();
 335                         _queue.pop_front ();
 336                         if (qi.type == QueueItem::FULL && qi.encoded) {
 337                                 --_queued_full_in_memory;
 338                         }
 339
 340                         lock.unlock ();
 341
 342                         ReelWriter& reel = _reels[qi.reel];
 343
 344                         switch (qi.type) {
 345                         case QueueItem::FULL:
 346                                 LOG_DEBUG_ENCODE (N_("Writer FULL-writes %1 (%2)"), qi.frame, (int) qi.eyes);
 347                                 if (!qi.encoded) {
 348                                         qi.encoded = Data (_film->j2c_path (qi.reel, qi.frame, qi.eyes, false));
 349                                 }
 350                                 reel.write (qi.encoded, qi.frame, qi.eyes);
 351                                 ++_full_written;
 352                                 break;
 353                         case QueueItem::FAKE:
 354                                 LOG_DEBUG_ENCODE (N_("Writer FAKE-writes %1"), qi.frame);
 355                                 reel.fake_write (qi.frame, qi.eyes, qi.size);
 356                                 ++_fake_written;
 357                                 break;
 358                         case QueueItem::REPEAT:
 359                                 LOG_DEBUG_ENCODE (N_("Writer REPEAT-writes %1"), qi.frame);
 360                                 reel.repeat_write (qi.frame, qi.eyes);
 361                                 ++_repeat_written;
 362                                 break;
 363                         }
 364
 365                         lock.lock ();
 366                 }
 367
 368                 while (_queued_full_in_memory > _maximum_frames_in_memory) {
 369                         /* Too many frames in memory which can't yet be written to the stream.
 370                            Write some FULL frames to disk.
 371                         */
 372
 373                         /* Find one from the back of the queue */
 374                         _queue.sort ();
 375                         list<QueueItem>::reverse_iterator i = _queue.rbegin ();
 376                         while (i != _queue.rend() && (i->type != QueueItem::FULL || !i->encoded)) {
 377                                 ++i;
 378                         }
 379
 380                         DCPOMATIC_ASSERT (i != _queue.rend());
 381                         ++_pushed_to_disk;
 382                         lock.unlock ();
 383
 384                         /* i is valid here, even though we don't hold a lock on the mutex,
 385                            since list iterators are unaffected by insertion and only this
 386                            thread could erase the last item in the list.
 387                         */
 388
 389                         LOG_GENERAL ("Writer full; pushes %1 to disk", i->frame);
 390
 391                         i->encoded->write_via_temp (
 392                                 _film->j2c_path (i->reel, i->frame, i->eyes, true),
 393                                 _film->j2c_path (i->reel, i->frame, i->eyes, false)
 394                                 );
 395
 396                         lock.lock ();
 397                         i->encoded.reset ();
 398                         --_queued_full_in_memory;
 399                 }
 400
 401                 /* The queue has probably just gone down a bit; notify anything wait()ing on _full_condition */
 402                 _full_condition.notify_all ();
 403         }
 404 }
 405 catch (...)
 406 {
 407         store_current ();
 408 }
 409
 410 void
 411 Writer::terminate_thread (bool can_throw)
 412 {
 413         boost::mutex::scoped_lock lock (_state_mutex);
 414         if (_thread == 0) {
 415                 return;
 416         }
 417
 418         _finish = true;
 419         _empty_condition.notify_all ();
 420         _full_condition.notify_all ();
 421         lock.unlock ();
 422
 423         if (_thread->joinable ()) {
 424                 _thread->join ();
 425         }
 426
 427         if (can_throw) {
 428                 rethrow ();
 429         }
 430
 431         delete _thread;
 432         _thread = 0;
 433 }
 434
 435 void
 436 Writer::finish ()
 437 {
 438         if (!_thread) {
 439                 return;
 440         }
 441
 442         LOG_GENERAL_NC ("Terminating writer thread");
 443
 444         terminate_thread (true);
 445
 446         LOG_GENERAL_NC ("Finishing ReelWriters");
 447
 448         BOOST_FOREACH (ReelWriter& i, _reels) {
 449                 i.finish ();
 450         }
 451
 452         LOG_GENERAL_NC ("Writing XML");
 453
 454         dcp::DCP dcp (_film->dir (_film->dcp_name()));
 455
 456         shared_ptr<dcp::CPL> cpl (
 457                 new dcp::CPL (
 458                         _film->dcp_name(),
 459                         _film->dcp_content_type()->libdcp_kind ()
 460                         )
 461                 );
 462
 463         dcp.add (cpl);
 464
 465         /* Calculate digests for each reel in parallel */
 466
 467         shared_ptr<Job> job = _job.lock ();
 468         job->sub (_("Computing digests"));
 469
 470         boost::asio::io_service service;
 471         boost::thread_group pool;
 472
 473         shared_ptr<boost::asio::io_service::work> work (new boost::asio::io_service::work (service));
 474
 475         int const threads = max (1, Config::instance()->num_local_encoding_threads ());
 476
 477         for (int i = 0; i < threads; ++i) {
 478                 pool.create_thread (boost::bind (&boost::asio::io_service::run, &service));
 479         }
 480
 481         BOOST_FOREACH (ReelWriter& i, _reels) {
 482                 boost::function<void (float)> set_progress = boost::bind (&Writer::set_digest_progress, this, job.get(), _1);
 483                 service.post (boost::bind (&ReelWriter::calculate_digests, &i, set_progress));
 484         }
 485
 486         work.reset ();
 487         pool.join_all ();
 488         service.stop ();
 489
 490         /* Add reels to CPL */
 491
 492         BOOST_FOREACH (ReelWriter& i, _reels) {
 493                 cpl->add (i.create_reel (_reel_assets, _fonts));
 494         }
 495
 496         dcp::XMLMetadata meta;
 497         meta.creator = Config::instance()->dcp_creator ();
 498         if (meta.creator.empty ()) {
 499                 meta.creator = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 500         }
 501         meta.issuer = Config::instance()->dcp_issuer ();
 502         if (meta.issuer.empty ()) {
 503                 meta.issuer = String::compose ("DCP-o-matic %1 %2", dcpomatic_version, dcpomatic_git_commit);
 504         }
 505         meta.set_issue_date_now ();
 506
 507         cpl->set_metadata (meta);
 508
 509         shared_ptr<const dcp::CertificateChain> signer;
 510         if (_film->is_signed ()) {
 511                 signer = Config::instance()->signer_chain ();
 512                 /* We did check earlier, but check again here to be on the safe side */
 513                 if (!signer->valid ()) {
 514                         throw InvalidSignerError ();
 515                 }
 516         }
 517
 518         dcp.write_xml (_film->interop () ? dcp::INTEROP : dcp::SMPTE, meta, signer, Config::instance()->dcp_metadata_filename_format());
 519
 520         LOG_GENERAL (
 521                 N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT, %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk
 522                 );
 523 }
 524
 525 /** @param frame Frame index within the whole DCP.
 526  *  @return true if we can fake-write this frame.
 527  */
 528 bool
 529 Writer::can_fake_write (Frame frame) const
 530 {
 531         /* We have to do a proper write of the first frame so that we can set up the JPEG2000
 532            parameters in the asset writer.
 533         */
 534
 535         ReelWriter const & reel = _reels[video_reel(frame)];
 536
 537         /* Make frame relative to the start of the reel */
 538         frame -= reel.start ();
 539         return (frame != 0 && frame < reel.first_nonexistant_frame());
 540 }
 541
 542 void
 543 Writer::write (PlayerSubtitles subs)
 544 {
 545         if (subs.text.empty ()) {
 546                 return;
 547         }
 548
 549         if (_subtitle_reel->period().to <= subs.from) {
 550                 ++_subtitle_reel;
 551         }
 552
 553         _subtitle_reel->write (subs);
 554 }
 555
 556 void
 557 Writer::write (list<shared_ptr<Font> > fonts)
 558 {
 559         /* Just keep a list of unique fonts and we'll deal with them in ::finish */
 560
 561         BOOST_FOREACH (shared_ptr<Font> i, fonts) {
 562                 bool got = false;
 563                 BOOST_FOREACH (shared_ptr<Font> j, _fonts) {
 564                         if (*i == *j) {
 565                                 got = true;
 566                         }
 567                 }
 568
 569                 if (!got) {
 570                         _fonts.push_back (i);
 571                 }
 572         }
 573 }
 574
 575 bool
 576 operator< (QueueItem const & a, QueueItem const & b)
 577 {
 578         if (a.reel != b.reel) {
 579                 return a.reel < b.reel;
 580         }
 581
 582         if (a.frame != b.frame) {
 583                 return a.frame < b.frame;
 584         }
 585
 586         return static_cast<int> (a.eyes) < static_cast<int> (b.eyes);
 587 }
 588
 589 bool
 590 operator== (QueueItem const & a, QueueItem const & b)
 591 {
 592         return a.reel == b.reel && a.frame == b.frame && a.eyes == b.eyes;
 593 }
 594
 595 void
 596 Writer::set_encoder_threads (int threads)
 597 {
 598         /* I think the scaling factor here should be the ratio of the longest frame
 599            encode time to the shortest; if the thread count is T, longest time is L
 600            and the shortest time S we could encode L/S frames per thread whilst waiting
 601            for the L frame to encode so we might have to store LT/S frames.
 602
 603            However we don't want to use too much memory, so keep it a bit lower than we'd
 604            perhaps like.  A J2K frame is typically about 1Mb so 3 here will mean we could
 605            use about 240Mb with 72 encoding threads.
 606         */
 607         _maximum_frames_in_memory = lrint (threads * 3);
 608 }
 609
 610 void
 611 Writer::write (ReferencedReelAsset asset)
 612 {
 613         _reel_assets.push_back (asset);
 614 }
 615
 616 size_t
 617 Writer::video_reel (int frame) const
 618 {
 619         DCPTime t = DCPTime::from_frames (frame, _film->video_frame_rate ());
 620         size_t i = 0;
 621         while (i < _reels.size() && !_reels[i].period().contains (t)) {
 622                 ++i;
 623         }
 624
 625         DCPOMATIC_ASSERT (i < _reels.size ());
 626         return i;
 627 }
 628
 629 void
 630 Writer::set_digest_progress (Job* job, float progress)
 631 {
 632         /* I believe this is thread-safe */
 633         _digest_progresses[boost::this_thread::get_id()] = progress;
 634
 635         boost::mutex::scoped_lock lm (_digest_progresses_mutex);
 636         float min_progress = FLT_MAX;
 637         for (map<boost::thread::id, float>::const_iterator i = _digest_progresses.begin(); i != _digest_progresses.end(); ++i) {
 638                 min_progress = min (min_progress, i->second);
 639         }
 640
 641         job->set_progress (min_progress);
 642 }