Don't go into an infinite loop when recovering from a previous run in which the even...
[dcpomatic.git] / src / lib / reel_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 "reel_writer.h"
21 #include "film.h"
22 #include "cross.h"
23 #include "job.h"
24 #include "log.h"
25 #include "md5_digester.h"
26 #include "font.h"
27 #include "compose.hpp"
28 #include "audio_buffers.h"
29 #include <dcp/mono_picture_asset.h>
30 #include <dcp/stereo_picture_asset.h>
31 #include <dcp/sound_asset.h>
32 #include <dcp/sound_asset_writer.h>
33 #include <dcp/reel.h>
34 #include <dcp/reel_mono_picture_asset.h>
35 #include <dcp/reel_stereo_picture_asset.h>
36 #include <dcp/reel_sound_asset.h>
37 #include <dcp/reel_subtitle_asset.h>
38 #include <dcp/dcp.h>
39 #include <dcp/cpl.h>
40 #include <dcp/certificate_chain.h>
41 #include <dcp/interop_subtitle_asset.h>
42 #include <dcp/smpte_subtitle_asset.h>
43 #include <boost/foreach.hpp>
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_WARNING_NC(...) _film->log()->log (__VA_ARGS__, LogEntry::TYPE_WARNING);
50 #define LOG_ERROR(...) _film->log()->log (String::compose (__VA_ARGS__), LogEntry::TYPE_ERROR);
51
52 using std::list;
53 using std::string;
54 using std::cout;
55 using boost::shared_ptr;
56 using boost::optional;
57 using boost::dynamic_pointer_cast;
58 using dcp::Data;
59
60 int const ReelWriter::_info_size = 48;
61
62 ReelWriter::ReelWriter (shared_ptr<const Film> film, DCPTimePeriod period, shared_ptr<Job> job)
63         : _film (film)
64         , _period (period)
65         , _first_nonexistant_frame (0)
66         , _last_written_video_frame (-1)
67         , _last_written_eyes (EYES_RIGHT)
68         , _total_written_audio_frames (0)
69 {
70         /* Create our picture asset in a subdirectory, named according to those
71            film's parameters which affect the video output.  We will hard-link
72            it into the DCP later.
73         */
74
75         if (_film->three_d ()) {
76                 _picture_asset.reset (new dcp::StereoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
77         } else {
78                 _picture_asset.reset (new dcp::MonoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
79         }
80
81         _picture_asset->set_size (_film->frame_size ());
82
83         if (_film->encrypted ()) {
84                 _picture_asset->set_key (_film->key ());
85         }
86
87         _picture_asset->set_file (
88                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period)
89                 );
90
91         job->sub (_("Checking existing image data"));
92         check_existing_picture_asset ();
93
94         _picture_asset_writer = _picture_asset->start_write (
95                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period),
96                 _film->interop() ? dcp::INTEROP : dcp::SMPTE,
97                 _first_nonexistant_frame > 0
98                 );
99
100         if (_film->audio_channels ()) {
101                 _sound_asset.reset (
102                         new dcp::SoundAsset (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels ())
103                         );
104
105                 if (_film->encrypted ()) {
106                         _sound_asset->set_key (_film->key ());
107                 }
108
109                 /* Write the sound asset into the film directory so that we leave the creation
110                    of the DCP directory until the last minute.
111                 */
112                 _sound_asset_writer = _sound_asset->start_write (
113                         _film->directory() / audio_asset_filename (_sound_asset),
114                         _film->interop() ? dcp::INTEROP : dcp::SMPTE
115                         );
116         }
117 }
118
119 /** @param frame reel-relative frame */
120 void
121 ReelWriter::write_frame_info (Frame frame, Eyes eyes, dcp::FrameInfo info) const
122 {
123         FILE* file = 0;
124         boost::filesystem::path info_file = _film->info_file (_period);
125         if (boost::filesystem::exists (info_file)) {
126                 file = fopen_boost (info_file, "r+b");
127         } else {
128                 file = fopen_boost (info_file, "wb");
129         }
130         if (!file) {
131                 throw OpenFileError (info_file);
132         }
133         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
134         fwrite (&info.offset, sizeof (info.offset), 1, file);
135         fwrite (&info.size, sizeof (info.size), 1, file);
136         fwrite (info.hash.c_str(), 1, info.hash.size(), file);
137         fclose (file);
138 }
139
140 dcp::FrameInfo
141 ReelWriter::read_frame_info (FILE* file, Frame frame, Eyes eyes) const
142 {
143         dcp::FrameInfo info;
144         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
145         fread (&info.offset, sizeof (info.offset), 1, file);
146         fread (&info.size, sizeof (info.size), 1, file);
147
148         char hash_buffer[33];
149         fread (hash_buffer, 1, 32, file);
150         hash_buffer[32] = '\0';
151         info.hash = hash_buffer;
152
153         return info;
154 }
155
156 long
157 ReelWriter::frame_info_position (Frame frame, Eyes eyes) const
158 {
159         switch (eyes) {
160         case EYES_BOTH:
161                 return frame * _info_size;
162         case EYES_LEFT:
163                 return frame * _info_size * 2;
164         case EYES_RIGHT:
165                 return frame * _info_size * 2 + _info_size;
166         default:
167                 DCPOMATIC_ASSERT (false);
168         }
169
170         DCPOMATIC_ASSERT (false);
171 }
172
173 void
174 ReelWriter::check_existing_picture_asset ()
175 {
176         /* Try to open the existing asset */
177         FILE* asset_file = fopen_boost (_picture_asset->file(), "rb");
178         if (!asset_file) {
179                 LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", _picture_asset->file().string(), errno);
180                 return;
181         }
182
183         /* Offset of the last dcp::FrameInfo in the info file */
184         int const n = (boost::filesystem::file_size (_film->info_file(_period)) / _info_size) - 1;
185
186         FILE* info_file = fopen_boost (_film->info_file(_period), "rb");
187         if (!info_file) {
188                 LOG_GENERAL_NC ("Could not open film info file");
189                 fclose (asset_file);
190                 return;
191         }
192
193         if (_film->three_d ()) {
194                 /* Start looking at the last left frame */
195                 _first_nonexistant_frame = n / 2;
196         } else {
197                 _first_nonexistant_frame = n;
198         }
199
200         bool ok = false;
201
202         while (!ok && _first_nonexistant_frame > 0) {
203                 /* Read the data from the info file; for 3D we just check the left
204                    frames until we find a good one.
205                 */
206                 dcp::FrameInfo info = read_frame_info (info_file, _first_nonexistant_frame, _film->three_d () ? EYES_LEFT : EYES_BOTH);
207
208                 ok = true;
209
210                 /* Read the data from the asset and hash it */
211                 dcpomatic_fseek (asset_file, info.offset, SEEK_SET);
212                 Data data (info.size);
213                 size_t const read = fread (data.data().get(), 1, data.size(), asset_file);
214                 if (read != static_cast<size_t> (data.size ())) {
215                         LOG_GENERAL ("Existing frame %1 is incomplete", _first_nonexistant_frame);
216                         ok = false;
217                 } else {
218                         MD5Digester digester;
219                         digester.add (data.data().get(), data.size());
220                         if (digester.get() != info.hash) {
221                                 LOG_GENERAL ("Existing frame %1 failed hash check", _first_nonexistant_frame);
222                                 ok = false;
223                         }
224                 }
225
226                 if (!ok) {
227                         --_first_nonexistant_frame;
228                 }
229         }
230
231         if (!_film->three_d() && ok) {
232                 /* If we are doing 3D we might have found a good L frame with no R, so only
233                    do this if we're in 2D and we've just found a good B(oth) frame.
234                 */
235                 ++_first_nonexistant_frame;
236         }
237
238         fclose (asset_file);
239         fclose (info_file);
240 }
241
242 void
243 ReelWriter::write (optional<Data> encoded, Frame frame, Eyes eyes)
244 {
245         dcp::FrameInfo fin = _picture_asset_writer->write (encoded->data().get (), encoded->size());
246         write_frame_info (frame, eyes, fin);
247         _last_written[eyes] = encoded;
248         _last_written_video_frame = frame;
249         _last_written_eyes = eyes;
250 }
251
252 void
253 ReelWriter::fake_write (Frame frame, Eyes eyes, int size)
254 {
255         _picture_asset_writer->fake_write (size);
256         _last_written_video_frame = frame;
257         _last_written_eyes = eyes;
258 }
259
260 void
261 ReelWriter::repeat_write (Frame frame, Eyes eyes)
262 {
263         dcp::FrameInfo fin = _picture_asset_writer->write (
264                 _last_written[eyes]->data().get(),
265                 _last_written[eyes]->size()
266                 );
267         write_frame_info (frame, eyes, fin);
268         _last_written_video_frame = frame;
269         _last_written_eyes = eyes;
270 }
271
272 void
273 ReelWriter::finish ()
274 {
275         if (!_picture_asset_writer->finalize ()) {
276                 /* Nothing was written to the picture asset */
277                 _picture_asset.reset ();
278         }
279
280         if (_sound_asset_writer && !_sound_asset_writer->finalize ()) {
281                 /* Nothing was written to the sound asset */
282                 _sound_asset.reset ();
283         }
284
285         /* Hard-link any video asset file into the DCP */
286         if (_picture_asset) {
287                 boost::filesystem::path video_from = _picture_asset->file ();
288                 boost::filesystem::path video_to;
289                 video_to /= _film->dir (_film->dcp_name());
290                 video_to /= video_asset_filename (_picture_asset);
291
292                 boost::system::error_code ec;
293                 boost::filesystem::create_hard_link (video_from, video_to, ec);
294                 if (ec) {
295                         LOG_WARNING_NC ("Hard-link failed; copying instead");
296                         boost::filesystem::copy_file (video_from, video_to, ec);
297                         if (ec) {
298                                 LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
299                                 throw FileError (ec.message(), video_from);
300                         }
301                 }
302
303                 _picture_asset->set_file (video_to);
304         }
305
306         /* Move the audio asset into the DCP */
307         if (_sound_asset) {
308                 boost::filesystem::path audio_to;
309                 audio_to /= _film->dir (_film->dcp_name ());
310                 audio_to /= audio_asset_filename (_sound_asset);
311
312                 boost::system::error_code ec;
313                 boost::filesystem::rename (_film->file (audio_asset_filename (_sound_asset)), audio_to, ec);
314                 if (ec) {
315                         throw FileError (
316                                 String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), audio_asset_filename (_sound_asset)
317                                 );
318                 }
319
320                 _sound_asset->set_file (audio_to);
321         }
322 }
323
324 shared_ptr<dcp::Reel>
325 ReelWriter::create_reel (list<ReferencedReelAsset> const & refs, list<shared_ptr<Font> > const & fonts)
326 {
327         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
328
329         shared_ptr<dcp::ReelPictureAsset> reel_picture_asset;
330
331         if (_picture_asset) {
332                 /* We have made a picture asset of our own.  Put it into the reel */
333                 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
334                 if (mono) {
335                         reel_picture_asset.reset (new dcp::ReelMonoPictureAsset (mono, 0));
336                 }
337
338                 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
339                 if (stereo) {
340                         reel_picture_asset.reset (new dcp::ReelStereoPictureAsset (stereo, 0));
341                 }
342         } else {
343                 /* We don't have a picture asset of our own; hopefully we have one to reference */
344                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
345                         shared_ptr<dcp::ReelPictureAsset> k = dynamic_pointer_cast<dcp::ReelPictureAsset> (j.asset);
346                         if (k && j.period == _period) {
347                                 reel_picture_asset = k;
348                         }
349                 }
350         }
351
352         reel->add (reel_picture_asset);
353
354         if (_sound_asset) {
355                 /* We have made a sound asset of our own.  Put it into the reel */
356                 reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_asset, 0)));
357         } else {
358                 /* We don't have a sound asset of our own; hopefully we have one to reference */
359                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
360                         shared_ptr<dcp::ReelSoundAsset> k = dynamic_pointer_cast<dcp::ReelSoundAsset> (j.asset);
361                         if (k && j.period == _period) {
362                                 reel->add (k);
363                         }
364                 }
365         }
366
367         if (_subtitle_asset) {
368
369                 boost::filesystem::path liberation_normal;
370                 try {
371                         liberation_normal = shared_path() / "LiberationSans-Regular.ttf";
372                         if (!boost::filesystem::exists (liberation_normal)) {
373                                 /* Hack for unit tests */
374                                 liberation_normal = shared_path() / "fonts" / "LiberationSans-Regular.ttf";
375                         }
376                 } catch (boost::filesystem::filesystem_error& e) {
377
378                 }
379
380                 if (!boost::filesystem::exists(liberation_normal)) {
381                         liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
382                 }
383
384                 /* Add all the fonts to the subtitle content */
385                 BOOST_FOREACH (shared_ptr<Font> j, fonts) {
386                         _subtitle_asset->add_font (j->id(), j->file(FontFiles::NORMAL).get_value_or(liberation_normal));
387                 }
388
389                 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (_subtitle_asset)) {
390                         boost::filesystem::path directory = _film->dir (_film->dcp_name ()) / _subtitle_asset->id ();
391                         boost::filesystem::create_directories (directory);
392                         _subtitle_asset->write (directory / ("sub_" + _subtitle_asset->id() + ".xml"));
393                 } else {
394
395                         /* All our assets should be the same length; use the picture asset length here
396                            as a reference to set the subtitle one.
397                         */
398                         dynamic_pointer_cast<dcp::SMPTESubtitleAsset>(_subtitle_asset)->set_intrinsic_duration (
399                                 reel_picture_asset->intrinsic_duration ()
400                                 );
401
402                         _subtitle_asset->write (
403                                 _film->dir (_film->dcp_name ()) / ("sub_" + _subtitle_asset->id() + ".mxf")
404                                 );
405                 }
406
407                 reel->add (shared_ptr<dcp::ReelSubtitleAsset> (
408                                    new dcp::ReelSubtitleAsset (
409                                            _subtitle_asset,
410                                            dcp::Fraction (_film->video_frame_rate(), 1),
411                                            reel_picture_asset->intrinsic_duration (),
412                                            0
413                                            )
414                                    ));
415         } else {
416                 /* We don't have a subtitle asset of our own; hopefully we have one to reference */
417                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
418                         shared_ptr<dcp::ReelSubtitleAsset> k = dynamic_pointer_cast<dcp::ReelSubtitleAsset> (j.asset);
419                         if (k && j.period == _period) {
420                                 reel->add (k);
421                         }
422                 }
423         }
424
425         return reel;
426 }
427
428 void
429 ReelWriter::calculate_digests (shared_ptr<Job> job)
430 {
431         job->sub (_("Computing image digest"));
432         if (_picture_asset) {
433                 _picture_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
434         }
435
436         if (_sound_asset) {
437                 job->sub (_("Computing audio digest"));
438                 _sound_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
439         }
440 }
441
442 Frame
443 ReelWriter::start () const
444 {
445         return _period.from.frames_floor (_film->video_frame_rate());
446 }
447
448
449 void
450 ReelWriter::write (shared_ptr<const AudioBuffers> audio)
451 {
452         if (!_sound_asset_writer) {
453                 return;
454         }
455
456         if (audio) {
457                 _sound_asset_writer->write (audio->data(), audio->frames());
458         }
459
460         ++_total_written_audio_frames;
461 }
462
463 void
464 ReelWriter::write (PlayerSubtitles subs)
465 {
466         if (!_subtitle_asset) {
467                 string lang = _film->subtitle_language ();
468                 if (lang.empty ()) {
469                         lang = "Unknown";
470                 }
471                 if (_film->interop ()) {
472                         shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
473                         s->set_movie_title (_film->name ());
474                         s->set_language (lang);
475                         s->set_reel_number ("1");
476                         _subtitle_asset = s;
477                 } else {
478                         shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
479                         s->set_content_title_text (_film->name ());
480                         s->set_language (lang);
481                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
482                         s->set_reel_number (1);
483                         s->set_time_code_rate (_film->video_frame_rate ());
484                         s->set_start_time (dcp::Time ());
485                         _subtitle_asset = s;
486                 }
487         }
488
489         BOOST_FOREACH (dcp::SubtitleString i, subs.text) {
490                 i.set_in  (i.in()  - dcp::Time (_period.from.seconds(), i.in().tcr));
491                 i.set_out (i.out() - dcp::Time (_period.from.seconds(), i.out().tcr));
492                 _subtitle_asset->add (i);
493         }
494 }