src/lib/writer.cc

   1 /*
   2     Copyright (C) 2012 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 <fstream>
  21 #include <cerrno>
  22 #include <libdcp/mono_picture_asset.h>
  23 #include <libdcp/stereo_picture_asset.h>
  24 #include <libdcp/sound_asset.h>
  25 #include <libdcp/reel.h>
  26 #include <libdcp/dcp.h>
  27 #include <libdcp/cpl.h>
  28 #include "writer.h"
  29 #include "compose.hpp"
  30 #include "film.h"
  31 #include "ratio.h"
  32 #include "log.h"
  33 #include "dcp_video_frame.h"
  34 #include "dcp_content_type.h"
  35 #include "player.h"
  36 #include "audio_mapping.h"
  37 #include "config.h"
  38 #include "job.h"
  39 #include "cross.h"
  40
  41 #include "i18n.h"
  42
  43 using std::make_pair;
  44 using std::pair;
  45 using std::string;
  46 using std::list;
  47 using std::cout;
  48 using boost::shared_ptr;
  49 using boost::weak_ptr;
  50
  51 int const Writer::_maximum_frames_in_memory = 8;
  52
  53 Writer::Writer (shared_ptr<const Film> f, weak_ptr<Job> j)
  54         : _film (f)
  55         , _job (j)
  56         , _first_nonexistant_frame (0)
  57         , _thread (0)
  58         , _finish (false)
  59         , _queued_full_in_memory (0)
  60         , _last_written_frame (-1)
  61         , _last_written_eyes (EYES_RIGHT)
  62         , _full_written (0)
  63         , _fake_written (0)
  64         , _repeat_written (0)
  65         , _pushed_to_disk (0)
  66 {
  67         /* Remove any old DCP */
  68         boost::filesystem::remove_all (_film->dir (_film->dcp_name ()));
  69
  70         shared_ptr<Job> job = _job.lock ();
  71         assert (job);
  72
  73         job->sub (_("Checking existing image data"));
  74         check_existing_picture_mxf ();
  75
  76         /* Create our picture asset in a subdirectory, named according to those
  77            film's parameters which affect the video output.  We will hard-link
  78            it into the DCP later.
  79         */
  80
  81         if (_film->three_d ()) {
  82                 _picture_asset.reset (new libdcp::StereoPictureAsset (_film->internal_video_mxf_dir (), _film->internal_video_mxf_filename ()));
  83         } else {
  84                 _picture_asset.reset (new libdcp::MonoPictureAsset (_film->internal_video_mxf_dir (), _film->internal_video_mxf_filename ()));
  85         }
  86
  87         _picture_asset->set_edit_rate (_film->video_frame_rate ());
  88         _picture_asset->set_size (fit_ratio_within (_film->container()->ratio(), _film->full_frame ()));
  89
  90         if (_film->encrypted ()) {
  91                 _picture_asset->set_key (_film->key ());
  92         }
  93
  94         _picture_asset_writer = _picture_asset->start_write (_first_nonexistant_frame > 0);
  95
  96         _sound_asset.reset (new libdcp::SoundAsset (_film->dir (_film->dcp_name()), _film->audio_mxf_filename ()));
  97         _sound_asset->set_edit_rate (_film->video_frame_rate ());
  98         _sound_asset->set_channels (_film->audio_channels ());
  99         _sound_asset->set_sampling_rate (_film->audio_frame_rate ());
 100
 101         if (_film->encrypted ()) {
 102                 _sound_asset->set_key (_film->key ());
 103         }
 104
 105         _sound_asset_writer = _sound_asset->start_write ();
 106
 107         _thread = new boost::thread (boost::bind (&Writer::thread, this));
 108
 109         job->sub (_("Encoding image data"));
 110 }
 111
 112 void
 113 Writer::write (shared_ptr<const EncodedData> encoded, int frame, Eyes eyes)
 114 {
 115         boost::mutex::scoped_lock lock (_mutex);
 116
 117         QueueItem qi;
 118         qi.type = QueueItem::FULL;
 119         qi.encoded = encoded;
 120         qi.frame = frame;
 121
 122         if (_film->three_d() && eyes == EYES_BOTH) {
 123                 /* 2D material in a 3D DCP; fake the 3D */
 124                 qi.eyes = EYES_LEFT;
 125                 _queue.push_back (qi);
 126                 ++_queued_full_in_memory;
 127                 qi.eyes = EYES_RIGHT;
 128                 _queue.push_back (qi);
 129                 ++_queued_full_in_memory;
 130         } else {
 131                 qi.eyes = eyes;
 132                 _queue.push_back (qi);
 133                 ++_queued_full_in_memory;
 134         }
 135
 136         _condition.notify_all ();
 137 }
 138
 139 void
 140 Writer::fake_write (int frame, Eyes eyes)
 141 {
 142         boost::mutex::scoped_lock lock (_mutex);
 143
 144         FILE* ifi = fopen_boost (_film->info_path (frame, eyes), "r");
 145         libdcp::FrameInfo info (ifi);
 146         fclose (ifi);
 147
 148         QueueItem qi;
 149         qi.type = QueueItem::FAKE;
 150         qi.size = info.size;
 151         qi.frame = frame;
 152         if (_film->three_d() && eyes == EYES_BOTH) {
 153                 qi.eyes = EYES_LEFT;
 154                 _queue.push_back (qi);
 155                 qi.eyes = EYES_RIGHT;
 156                 _queue.push_back (qi);
 157         } else {
 158                 qi.eyes = eyes;
 159                 _queue.push_back (qi);
 160         }
 161
 162         _condition.notify_all ();
 163 }
 164
 165 /** This method is not thread safe */
 166 void
 167 Writer::write (shared_ptr<const AudioBuffers> audio)
 168 {
 169         _sound_asset_writer->write (audio->data(), audio->frames());
 170 }
 171
 172 /** This must be called from Writer::thread() with an appropriate lock held,
 173  *  and with _queue sorted.
 174  */
 175 bool
 176 Writer::have_sequenced_image_at_queue_head () const
 177 {
 178         if (_queue.empty ()) {
 179                 return false;
 180         }
 181
 182         /* The queue should contain only EYES_LEFT/EYES_RIGHT pairs or EYES_BOTH */
 183
 184         if (_queue.front().eyes == EYES_BOTH) {
 185                 /* 2D */
 186                 return _queue.front().frame == (_last_written_frame + 1);
 187         }
 188
 189         /* 3D */
 190
 191         if (_last_written_eyes == EYES_LEFT && _queue.front().frame == _last_written_frame && _queue.front().eyes == EYES_RIGHT) {
 192                 return true;
 193         }
 194
 195         if (_last_written_eyes == EYES_RIGHT && _queue.front().frame == (_last_written_frame + 1) && _queue.front().eyes == EYES_LEFT) {
 196                 return true;
 197         }
 198
 199         return false;
 200 }
 201
 202 void
 203 Writer::thread ()
 204 try
 205 {
 206         while (1)
 207         {
 208                 boost::mutex::scoped_lock lock (_mutex);
 209
 210                 while (1) {
 211
 212                         _queue.sort ();
 213
 214                         if (_finish || _queued_full_in_memory > _maximum_frames_in_memory || have_sequenced_image_at_queue_head ()) {
 215                                 break;
 216                         }
 217
 218                         TIMING (N_("writer sleeps with a queue of %1"), _queue.size());
 219                         _condition.wait (lock);
 220                         TIMING (N_("writer wakes with a queue of %1"), _queue.size());
 221                 }
 222
 223                 if (_finish && _queue.empty()) {
 224                         return;
 225                 }
 226
 227                 /* Write any frames that we can write; i.e. those that are in sequence */
 228                 while (have_sequenced_image_at_queue_head ()) {
 229                         QueueItem qi = _queue.front ();
 230                         _queue.pop_front ();
 231                         if (qi.type == QueueItem::FULL && qi.encoded) {
 232                                 --_queued_full_in_memory;
 233                         }
 234
 235                         lock.unlock ();
 236                         switch (qi.type) {
 237                         case QueueItem::FULL:
 238                         {
 239                                 _film->log()->log (String::compose (N_("Writer FULL-writes %1 to MXF"), qi.frame));
 240                                 if (!qi.encoded) {
 241                                         qi.encoded.reset (new EncodedData (_film->j2c_path (qi.frame, qi.eyes, false)));
 242                                 }
 243
 244                                 libdcp::FrameInfo fin = _picture_asset_writer->write (qi.encoded->data(), qi.encoded->size());
 245                                 qi.encoded->write_info (_film, qi.frame, qi.eyes, fin);
 246                                 _last_written[qi.eyes] = qi.encoded;
 247                                 ++_full_written;
 248                                 break;
 249                         }
 250                         case QueueItem::FAKE:
 251                                 _film->log()->log (String::compose (N_("Writer FAKE-writes %1 to MXF"), qi.frame));
 252                                 _picture_asset_writer->fake_write (qi.size);
 253                                 _last_written[qi.eyes].reset ();
 254                                 ++_fake_written;
 255                                 break;
 256                         case QueueItem::REPEAT:
 257                         {
 258                                 _film->log()->log (String::compose (N_("Writer REPEAT-writes %1 to MXF"), qi.frame));
 259                                 libdcp::FrameInfo fin = _picture_asset_writer->write (
 260                                         _last_written[qi.eyes]->data(),
 261                                         _last_written[qi.eyes]->size()
 262                                         );
 263
 264                                 _last_written[qi.eyes]->write_info (_film, qi.frame, qi.eyes, fin);
 265                                 ++_repeat_written;
 266                                 break;
 267                         }
 268                         }
 269                         lock.lock ();
 270
 271                         _last_written_frame = qi.frame;
 272                         _last_written_eyes = qi.eyes;
 273
 274                         if (_film->length()) {
 275                                 shared_ptr<Job> job = _job.lock ();
 276                                 assert (job);
 277                                 job->set_progress (
 278                                         float (_full_written + _fake_written + _repeat_written) / _film->time_to_video_frames (_film->length())
 279                                         );
 280                         }
 281                 }
 282
 283                 while (_queued_full_in_memory > _maximum_frames_in_memory) {
 284                         /* Too many frames in memory which can't yet be written to the stream.
 285                            Write some FULL frames to disk.
 286                         */
 287
 288                         /* Find one */
 289                         list<QueueItem>::reverse_iterator i = _queue.rbegin ();
 290                         while (i != _queue.rend() && (i->type != QueueItem::FULL || !i->encoded)) {
 291                                 ++i;
 292                         }
 293
 294                         assert (i != _queue.rend());
 295                         QueueItem qi = *i;
 296
 297                         ++_pushed_to_disk;
 298
 299                         lock.unlock ();
 300
 301                         _film->log()->log (
 302                                 String::compose (
 303                                         "Writer full (awaiting %1 [last eye was %2]); pushes %3 to disk",
 304                                         _last_written_frame + 1,
 305                                         _last_written_eyes, qi.frame)
 306                                 );
 307
 308                         qi.encoded->write (_film, qi.frame, qi.eyes);
 309                         lock.lock ();
 310                         qi.encoded.reset ();
 311                         --_queued_full_in_memory;
 312                 }
 313         }
 314 }
 315 catch (...)
 316 {
 317         store_current ();
 318 }
 319
 320 void
 321 Writer::finish ()
 322 {
 323         if (!_thread) {
 324                 return;
 325         }
 326
 327         boost::mutex::scoped_lock lock (_mutex);
 328         _finish = true;
 329         _condition.notify_all ();
 330         lock.unlock ();
 331
 332         _thread->join ();
 333         if (thrown ()) {
 334                 rethrow ();
 335         }
 336
 337         delete _thread;
 338         _thread = 0;
 339
 340         _picture_asset_writer->finalize ();
 341         _sound_asset_writer->finalize ();
 342
 343         int const frames = _last_written_frame + 1;
 344
 345         _picture_asset->set_duration (frames);
 346
 347         /* Hard-link the video MXF into the DCP */
 348
 349         boost::filesystem::path from;
 350         from /= _film->internal_video_mxf_dir();
 351         from /= _film->internal_video_mxf_filename();
 352
 353         boost::filesystem::path to;
 354         to /= _film->dir (_film->dcp_name());
 355         to /= _film->video_mxf_filename ();
 356
 357         boost::system::error_code ec;
 358         boost::filesystem::create_hard_link (from, to, ec);
 359         if (ec) {
 360                 /* hard link failed; copy instead */
 361                 boost::filesystem::copy_file (from, to);
 362                 _film->log()->log ("Hard-link failed; fell back to copying");
 363         }
 364
 365         /* And update the asset */
 366
 367         _picture_asset->set_directory (_film->dir (_film->dcp_name ()));
 368         _picture_asset->set_file_name (_film->video_mxf_filename ());
 369         _sound_asset->set_duration (frames);
 370
 371         libdcp::DCP dcp (_film->dir (_film->dcp_name()));
 372
 373         shared_ptr<libdcp::CPL> cpl (
 374                 new libdcp::CPL (
 375                         _film->dir (_film->dcp_name()),
 376                         _film->dcp_name(),
 377                         _film->dcp_content_type()->libdcp_kind (),
 378                         frames,
 379                         _film->video_frame_rate ()
 380                         )
 381                 );
 382
 383         dcp.add_cpl (cpl);
 384
 385         cpl->add_reel (shared_ptr<libdcp::Reel> (new libdcp::Reel (
 386                                                          _picture_asset,
 387                                                          _sound_asset,
 388                                                          shared_ptr<libdcp::SubtitleAsset> ()
 389                                                          )
 390                                ));
 391
 392         shared_ptr<Job> job = _job.lock ();
 393         assert (job);
 394
 395         job->sub (_("Computing image digest"));
 396         _picture_asset->compute_digest (boost::bind (&Job::set_progress, job.get(), _1, false));
 397
 398         job->sub (_("Computing audio digest"));
 399         _sound_asset->compute_digest (boost::bind (&Job::set_progress, job.get(), _1, false));
 400
 401         libdcp::XMLMetadata meta = Config::instance()->dcp_metadata ();
 402         meta.set_issue_date_now ();
 403         dcp.write_xml (_film->interop (), meta, make_signer ());
 404
 405         _film->log()->log (String::compose (N_("Wrote %1 FULL, %2 FAKE, %3 REPEAT; %4 pushed to disk"), _full_written, _fake_written, _repeat_written, _pushed_to_disk));
 406 }
 407
 408 /** Tell the writer that frame `f' should be a repeat of the frame before it */
 409 void
 410 Writer::repeat (int f, Eyes e)
 411 {
 412         boost::mutex::scoped_lock lock (_mutex);
 413
 414         QueueItem qi;
 415         qi.type = QueueItem::REPEAT;
 416         qi.frame = f;
 417         if (_film->three_d() && e == EYES_BOTH) {
 418                 qi.eyes = EYES_LEFT;
 419                 _queue.push_back (qi);
 420                 qi.eyes = EYES_RIGHT;
 421                 _queue.push_back (qi);
 422         } else {
 423                 qi.eyes = e;
 424                 _queue.push_back (qi);
 425         }
 426
 427         _condition.notify_all ();
 428 }
 429
 430 bool
 431 Writer::check_existing_picture_mxf_frame (FILE* mxf, int f, Eyes eyes)
 432 {
 433         /* Read the frame info as written */
 434         FILE* ifi = fopen_boost (_film->info_path (f, eyes), "r");
 435         libdcp::FrameInfo info (ifi);
 436         fclose (ifi);
 437         if (info.size == 0) {
 438                 _film->log()->log (String::compose ("Existing frame %1 has no info file", f));
 439                 return false;
 440         }
 441
 442         /* Read the data from the MXF and hash it */
 443 #ifdef DCPOMATIC_WINDOWS
 444         _fseeki64 (mxf, info.offset, SEEK_SET);
 445 #else
 446         fseek (mxf, info.offset, SEEK_SET);
 447 #endif
 448         EncodedData data (info.size);
 449         size_t const read = fread (data.data(), 1, data.size(), mxf);
 450         if (read != static_cast<size_t> (data.size ())) {
 451                 _film->log()->log (String::compose ("Existing frame %1 is incomplete", f));
 452                 return false;
 453         }
 454
 455         string const existing_hash = md5_digest (data.data(), data.size());
 456         if (existing_hash != info.hash) {
 457                 _film->log()->log (String::compose ("Existing frame %1 failed hash check", f));
 458                 return false;
 459         }
 460
 461         return true;
 462 }
 463
 464 void
 465 Writer::check_existing_picture_mxf ()
 466 {
 467         /* Try to open the existing MXF */
 468         boost::filesystem::path p;
 469         p /= _film->internal_video_mxf_dir ();
 470         p /= _film->internal_video_mxf_filename ();
 471         FILE* mxf = fopen (p.string().c_str(), "rb");
 472         if (!mxf) {
 473                 _film->log()->log (String::compose ("Could not open existing MXF at %1 (errno=%2)", p.string(), errno));
 474                 return;
 475         }
 476
 477         int N = 0;
 478         for (boost::filesystem::directory_iterator i (_film->info_dir ()); i != boost::filesystem::directory_iterator (); ++i) {
 479                 ++N;
 480         }
 481
 482         while (1) {
 483
 484                 shared_ptr<Job> job = _job.lock ();
 485                 assert (job);
 486
 487                 job->set_progress (float (_first_nonexistant_frame) / N);
 488
 489                 if (_film->three_d ()) {
 490                         if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_LEFT)) {
 491                                 break;
 492                         }
 493                         if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_RIGHT)) {
 494                                 break;
 495                         }
 496                 } else {
 497                         if (!check_existing_picture_mxf_frame (mxf, _first_nonexistant_frame, EYES_BOTH)) {
 498                                 break;
 499                         }
 500                 }
 501
 502                 _film->log()->log (String::compose ("Have existing frame %1", _first_nonexistant_frame));
 503                 ++_first_nonexistant_frame;
 504         }
 505
 506         fclose (mxf);
 507 }
 508
 509 /** @param frame Frame index.
 510  *  @return true if we can fake-write this frame.
 511  */
 512 bool
 513 Writer::can_fake_write (int frame) const
 514 {
 515         /* We have to do a proper write of the first frame so that we can set up the JPEG2000
 516            parameters in the MXF writer.
 517         */
 518         return (frame != 0 && frame < _first_nonexistant_frame);
 519 }
 520
 521 bool
 522 operator< (QueueItem const & a, QueueItem const & b)
 523 {
 524         if (a.frame != b.frame) {
 525                 return a.frame < b.frame;
 526         }
 527
 528         return static_cast<int> (a.eyes) < static_cast<int> (b.eyes);
 529 }
 530
 531 bool
 532 operator== (QueueItem const & a, QueueItem const & b)
 533 {
 534         return a.frame == b.frame && a.eyes == b.eyes;
 535 }