Use libdcp's compress_j2k; move Data into libdcp.
[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 boost::shared_ptr;
55 using boost::optional;
56 using boost::dynamic_pointer_cast;
57 using dcp::Data;
58
59 int const ReelWriter::_info_size = 48;
60
61 ReelWriter::ReelWriter (shared_ptr<const Film> film, DCPTimePeriod period, shared_ptr<Job> job)
62         : _film (film)
63         , _period (period)
64         , _first_nonexistant_frame (0)
65         , _last_written_video_frame (-1)
66         , _last_written_eyes (EYES_RIGHT)
67         , _total_written_audio_frames (0)
68 {
69         /* Create our picture asset in a subdirectory, named according to those
70            film's parameters which affect the video output.  We will hard-link
71            it into the DCP later.
72         */
73
74         if (_film->three_d ()) {
75                 _picture_asset.reset (new dcp::StereoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
76         } else {
77                 _picture_asset.reset (new dcp::MonoPictureAsset (dcp::Fraction (_film->video_frame_rate (), 1)));
78         }
79
80         _picture_asset->set_size (_film->frame_size ());
81
82         if (_film->encrypted ()) {
83                 _picture_asset->set_key (_film->key ());
84         }
85
86         _picture_asset->set_file (
87                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period)
88                 );
89
90         job->sub (_("Checking existing image data"));
91         check_existing_picture_asset ();
92
93         _picture_asset_writer = _picture_asset->start_write (
94                 _film->internal_video_asset_dir() / _film->internal_video_asset_filename(_period),
95                 _film->interop() ? dcp::INTEROP : dcp::SMPTE,
96                 _first_nonexistant_frame > 0
97                 );
98
99         if (_film->audio_channels ()) {
100                 _sound_asset.reset (
101                         new dcp::SoundAsset (dcp::Fraction (_film->video_frame_rate(), 1), _film->audio_frame_rate (), _film->audio_channels ())
102                         );
103
104                 if (_film->encrypted ()) {
105                         _sound_asset->set_key (_film->key ());
106                 }
107
108                 /* Write the sound asset into the film directory so that we leave the creation
109                    of the DCP directory until the last minute.
110                 */
111                 _sound_asset_writer = _sound_asset->start_write (
112                         _film->directory() / audio_asset_filename (_sound_asset),
113                         _film->interop() ? dcp::INTEROP : dcp::SMPTE
114                         );
115         }
116 }
117
118 /** @param frame reel-relative frame */
119 void
120 ReelWriter::write_frame_info (Frame frame, Eyes eyes, dcp::FrameInfo info) const
121 {
122         FILE* file = 0;
123         boost::filesystem::path info_file = _film->info_file (_period);
124         if (boost::filesystem::exists (info_file)) {
125                 file = fopen_boost (info_file, "r+b");
126         } else {
127                 file = fopen_boost (info_file, "wb");
128         }
129         if (!file) {
130                 throw OpenFileError (info_file);
131         }
132         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
133         fwrite (&info.offset, sizeof (info.offset), 1, file);
134         fwrite (&info.size, sizeof (info.size), 1, file);
135         fwrite (info.hash.c_str(), 1, info.hash.size(), file);
136         fclose (file);
137 }
138
139 dcp::FrameInfo
140 ReelWriter::read_frame_info (FILE* file, Frame frame, Eyes eyes) const
141 {
142         dcp::FrameInfo info;
143         dcpomatic_fseek (file, frame_info_position (frame, eyes), SEEK_SET);
144         fread (&info.offset, sizeof (info.offset), 1, file);
145         fread (&info.size, sizeof (info.size), 1, file);
146
147         char hash_buffer[33];
148         fread (hash_buffer, 1, 32, file);
149         hash_buffer[32] = '\0';
150         info.hash = hash_buffer;
151
152         return info;
153 }
154
155 long
156 ReelWriter::frame_info_position (Frame frame, Eyes eyes) const
157 {
158         switch (eyes) {
159         case EYES_BOTH:
160                 return frame * _info_size;
161         case EYES_LEFT:
162                 return frame * _info_size * 2;
163         case EYES_RIGHT:
164                 return frame * _info_size * 2 + _info_size;
165         default:
166                 DCPOMATIC_ASSERT (false);
167         }
168
169         DCPOMATIC_ASSERT (false);
170 }
171
172 void
173 ReelWriter::check_existing_picture_asset ()
174 {
175         /* Try to open the existing asset */
176         FILE* asset_file = fopen_boost (_picture_asset->file(), "rb");
177         if (!asset_file) {
178                 LOG_GENERAL ("Could not open existing asset at %1 (errno=%2)", _picture_asset->file().string(), errno);
179                 return;
180         }
181
182         /* Offset of the last dcp::FrameInfo in the info file */
183         int const n = (boost::filesystem::file_size (_film->info_file(_period)) / _info_size) - 1;
184
185         FILE* info_file = fopen_boost (_film->info_file(_period), "rb");
186         if (!info_file) {
187                 LOG_GENERAL_NC ("Could not open film info file");
188                 fclose (asset_file);
189                 return;
190         }
191
192         if (_film->three_d ()) {
193                 /* Start looking at the last left frame */
194                 _first_nonexistant_frame = n / 2;
195         } else {
196                 _first_nonexistant_frame = n;
197         }
198
199         bool ok = false;
200
201         while (!ok) {
202                 /* Read the data from the info file; for 3D we just check the left
203                    frames until we find a good one.
204                 */
205                 dcp::FrameInfo info = read_frame_info (info_file, _first_nonexistant_frame, _film->three_d () ? EYES_LEFT : EYES_BOTH);
206
207                 ok = true;
208
209                 /* Read the data from the asset and hash it */
210                 dcpomatic_fseek (asset_file, info.offset, SEEK_SET);
211                 Data data (info.size);
212                 size_t const read = fread (data.data().get(), 1, data.size(), asset_file);
213                 if (read != static_cast<size_t> (data.size ())) {
214                         LOG_GENERAL ("Existing frame %1 is incomplete", _first_nonexistant_frame);
215                         ok = false;
216                 } else {
217                         MD5Digester digester;
218                         digester.add (data.data().get(), data.size());
219                         if (digester.get() != info.hash) {
220                                 LOG_GENERAL ("Existing frame %1 failed hash check", _first_nonexistant_frame);
221                                 ok = false;
222                         }
223                 }
224
225                 if (!ok) {
226                         --_first_nonexistant_frame;
227                 }
228         }
229
230         if (!_film->three_d ()) {
231                 /* If we are doing 3D we might have found a good L frame with no R, so only
232                    do this if we're in 2D and we've just found a good B(oth) frame.
233                 */
234                 ++_first_nonexistant_frame;
235         }
236
237         fclose (asset_file);
238         fclose (info_file);
239 }
240
241 void
242 ReelWriter::write (optional<Data> encoded, Frame frame, Eyes eyes)
243 {
244         dcp::FrameInfo fin = _picture_asset_writer->write (encoded->data().get (), encoded->size());
245         write_frame_info (frame, eyes, fin);
246         _last_written[eyes] = encoded;
247         _last_written_video_frame = frame;
248         _last_written_eyes = eyes;
249 }
250
251 void
252 ReelWriter::fake_write (Frame frame, Eyes eyes, int size)
253 {
254         _picture_asset_writer->fake_write (size);
255         _last_written_video_frame = frame;
256         _last_written_eyes = eyes;
257 }
258
259 void
260 ReelWriter::repeat_write (Frame frame, Eyes eyes)
261 {
262         dcp::FrameInfo fin = _picture_asset_writer->write (
263                 _last_written[eyes]->data().get(),
264                 _last_written[eyes]->size()
265                 );
266         write_frame_info (frame, eyes, fin);
267         _last_written_video_frame = frame;
268         _last_written_eyes = eyes;
269 }
270
271 void
272 ReelWriter::finish ()
273 {
274         if (!_picture_asset_writer->finalize ()) {
275                 /* Nothing was written to the picture asset */
276                 _picture_asset.reset ();
277         }
278
279         if (_sound_asset_writer && !_sound_asset_writer->finalize ()) {
280                 /* Nothing was written to the sound asset */
281                 _sound_asset.reset ();
282         }
283
284         /* Hard-link any video asset file into the DCP */
285         if (_picture_asset) {
286                 boost::filesystem::path video_from = _picture_asset->file ();
287                 boost::filesystem::path video_to;
288                 video_to /= _film->dir (_film->dcp_name());
289                 video_to /= video_asset_filename (_picture_asset);
290
291                 boost::system::error_code ec;
292                 boost::filesystem::create_hard_link (video_from, video_to, ec);
293                 if (ec) {
294                         LOG_WARNING_NC ("Hard-link failed; copying instead");
295                         boost::filesystem::copy_file (video_from, video_to, ec);
296                         if (ec) {
297                                 LOG_ERROR ("Failed to copy video file from %1 to %2 (%3)", video_from.string(), video_to.string(), ec.message ());
298                                 throw FileError (ec.message(), video_from);
299                         }
300                 }
301
302                 _picture_asset->set_file (video_to);
303         }
304
305         /* Move the audio asset into the DCP */
306         if (_sound_asset) {
307                 boost::filesystem::path audio_to;
308                 audio_to /= _film->dir (_film->dcp_name ());
309                 audio_to /= audio_asset_filename (_sound_asset);
310
311                 boost::system::error_code ec;
312                 boost::filesystem::rename (_film->file (audio_asset_filename (_sound_asset)), audio_to, ec);
313                 if (ec) {
314                         throw FileError (
315                                 String::compose (_("could not move audio asset into the DCP (%1)"), ec.value ()), audio_asset_filename (_sound_asset)
316                                 );
317                 }
318
319                 _sound_asset->set_file (audio_to);
320         }
321 }
322
323 shared_ptr<dcp::Reel>
324 ReelWriter::create_reel (list<ReferencedReelAsset> const & refs, list<shared_ptr<Font> > const & fonts)
325 {
326         shared_ptr<dcp::Reel> reel (new dcp::Reel ());
327
328         shared_ptr<dcp::ReelPictureAsset> reel_picture_asset;
329
330         if (_picture_asset) {
331                 /* We have made a picture asset of our own.  Put it into the reel */
332                 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (_picture_asset);
333                 if (mono) {
334                         reel_picture_asset.reset (new dcp::ReelMonoPictureAsset (mono, 0));
335                 }
336
337                 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (_picture_asset);
338                 if (stereo) {
339                         reel_picture_asset.reset (new dcp::ReelStereoPictureAsset (stereo, 0));
340                 }
341         } else {
342                 /* We don't have a picture asset of our own; hopefully we have one to reference */
343                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
344                         shared_ptr<dcp::ReelPictureAsset> k = dynamic_pointer_cast<dcp::ReelPictureAsset> (j.asset);
345                         if (k && j.period == _period) {
346                                 reel_picture_asset = k;
347                         }
348                 }
349         }
350
351         reel->add (reel_picture_asset);
352
353         if (_sound_asset) {
354                 /* We have made a sound asset of our own.  Put it into the reel */
355                 reel->add (shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (_sound_asset, 0)));
356         } else {
357                 /* We don't have a sound asset of our own; hopefully we have one to reference */
358                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
359                         shared_ptr<dcp::ReelSoundAsset> k = dynamic_pointer_cast<dcp::ReelSoundAsset> (j.asset);
360                         if (k && j.period == _period) {
361                                 reel->add (k);
362                         }
363                 }
364         }
365
366         if (_subtitle_asset) {
367
368                 boost::filesystem::path liberation_normal;
369                 try {
370                         liberation_normal = shared_path() / "LiberationSans-Regular.ttf";
371                         if (!boost::filesystem::exists (liberation_normal)) {
372                                 /* Hack for unit tests */
373                                 liberation_normal = shared_path() / "fonts" / "LiberationSans-Regular.ttf";
374                         }
375                 } catch (boost::filesystem::filesystem_error& e) {
376
377                 }
378
379                 if (!boost::filesystem::exists(liberation_normal)) {
380                         liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
381                 }
382
383                 /* Add all the fonts to the subtitle content */
384                 BOOST_FOREACH (shared_ptr<Font> j, fonts) {
385                         _subtitle_asset->add_font (j->id(), j->file(FontFiles::NORMAL).get_value_or(liberation_normal));
386                 }
387
388                 if (dynamic_pointer_cast<dcp::InteropSubtitleAsset> (_subtitle_asset)) {
389                         boost::filesystem::path directory = _film->dir (_film->dcp_name ()) / _subtitle_asset->id ();
390                         boost::filesystem::create_directories (directory);
391                         _subtitle_asset->write (directory / ("sub_" + _subtitle_asset->id() + ".xml"));
392                 } else {
393
394                         /* All our assets should be the same length; use the picture asset length here
395                            as a reference to set the subtitle one.
396                         */
397                         dynamic_pointer_cast<dcp::SMPTESubtitleAsset>(_subtitle_asset)->set_intrinsic_duration (
398                                 reel_picture_asset->intrinsic_duration ()
399                                 );
400
401                         _subtitle_asset->write (
402                                 _film->dir (_film->dcp_name ()) / ("sub_" + _subtitle_asset->id() + ".mxf")
403                                 );
404                 }
405
406                 reel->add (shared_ptr<dcp::ReelSubtitleAsset> (
407                                    new dcp::ReelSubtitleAsset (
408                                            _subtitle_asset,
409                                            dcp::Fraction (_film->video_frame_rate(), 1),
410                                            reel_picture_asset->intrinsic_duration (),
411                                            0
412                                            )
413                                    ));
414         } else {
415                 /* We don't have a subtitle asset of our own; hopefully we have one to reference */
416                 BOOST_FOREACH (ReferencedReelAsset j, refs) {
417                         shared_ptr<dcp::ReelSubtitleAsset> k = dynamic_pointer_cast<dcp::ReelSubtitleAsset> (j.asset);
418                         if (k && j.period == _period) {
419                                 reel->add (k);
420                         }
421                 }
422         }
423
424         return reel;
425 }
426
427 void
428 ReelWriter::calculate_digests (shared_ptr<Job> job)
429 {
430         job->sub (_("Computing image digest"));
431         if (_picture_asset) {
432                 _picture_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
433         }
434
435         if (_sound_asset) {
436                 job->sub (_("Computing audio digest"));
437                 _sound_asset->hash (boost::bind (&Job::set_progress, job.get(), _1, false));
438         }
439 }
440
441 Frame
442 ReelWriter::start () const
443 {
444         return _period.from.frames_floor (_film->video_frame_rate());
445 }
446
447
448 void
449 ReelWriter::write (shared_ptr<const AudioBuffers> audio)
450 {
451         if (!_sound_asset_writer) {
452                 return;
453         }
454
455         if (audio) {
456                 _sound_asset_writer->write (audio->data(), audio->frames());
457         }
458
459         ++_total_written_audio_frames;
460 }
461
462 void
463 ReelWriter::write (PlayerSubtitles subs)
464 {
465         if (!_subtitle_asset) {
466                 string lang = _film->subtitle_language ();
467                 if (lang.empty ()) {
468                         lang = "Unknown";
469                 }
470                 if (_film->interop ()) {
471                         shared_ptr<dcp::InteropSubtitleAsset> s (new dcp::InteropSubtitleAsset ());
472                         s->set_movie_title (_film->name ());
473                         s->set_language (lang);
474                         s->set_reel_number ("1");
475                         _subtitle_asset = s;
476                 } else {
477                         shared_ptr<dcp::SMPTESubtitleAsset> s (new dcp::SMPTESubtitleAsset ());
478                         s->set_content_title_text (_film->name ());
479                         s->set_language (lang);
480                         s->set_edit_rate (dcp::Fraction (_film->video_frame_rate (), 1));
481                         s->set_reel_number (1);
482                         s->set_time_code_rate (_film->video_frame_rate ());
483                         s->set_start_time (dcp::Time ());
484                         _subtitle_asset = s;
485                 }
486         }
487
488         BOOST_FOREACH (dcp::SubtitleString i, subs.text) {
489                 i.set_in  (i.in()  - dcp::Time (_period.from.seconds(), i.in().tcr));
490                 i.set_out (i.out() - dcp::Time (_period.from.seconds(), i.out().tcr));
491                 _subtitle_asset->add (i);
492         }
493 }