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