2 Copyright (C) 2013-2016 Carl Hetherington <cth@carlh.net>
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.
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.
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.
21 #include "sndfile_content.h"
22 #include "sndfile_decoder.h"
23 #include "video_content.h"
24 #include "subtitle_content.h"
25 #include "ffmpeg_decoder.h"
26 #include "ffmpeg_content.h"
27 #include "image_decoder.h"
28 #include "content_factory.h"
29 #include "dcp_content.h"
33 #include "md5_digester.h"
34 #include <libcxml/cxml.h>
35 #include <libxml++/libxml++.h>
36 #include <boost/shared_ptr.hpp>
37 #include <boost/foreach.hpp>
49 using boost::optional;
50 using boost::shared_ptr;
51 using boost::weak_ptr;
52 using boost::dynamic_pointer_cast;
61 Playlist::~Playlist ()
68 Playlist::content_changed (weak_ptr<Content> content, int property, bool frequent)
70 if (property == ContentProperty::LENGTH || property == VideoContentProperty::VIDEO_FRAME_TYPE) {
71 /* Don't respond to position changes here, as:
72 - sequencing after earlier/later changes is handled by move_earlier/move_later
73 - any other position changes will be timeline drags which should not result in content
80 property == ContentProperty::POSITION ||
81 property == ContentProperty::LENGTH ||
82 property == ContentProperty::TRIM_START ||
83 property == ContentProperty::TRIM_END) {
85 ContentList old = _content;
86 sort (_content.begin(), _content.end(), ContentSorter ());
87 if (_content != old) {
92 ContentChanged (content, property, frequent);
96 Playlist::maybe_sequence ()
98 if (!_sequence || _sequencing) {
104 /* Keep track of the content that we've set the position of so that we don't
113 BOOST_FOREACH (shared_ptr<Content> i, _content) {
118 if (i->video->video_frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
119 i->set_position (next_right);
120 next_right = i->end();
122 i->set_position (next_left);
123 next_left = i->end();
126 placed.push_back (i);
132 BOOST_FOREACH (shared_ptr<Content> i, _content) {
133 if (!i->subtitle || find (placed.begin(), placed.end(), i) != placed.end()) {
137 i->set_position (next);
142 /* This won't change order, so it does not need a sort */
148 Playlist::video_identifier () const
152 BOOST_FOREACH (shared_ptr<const Content> i, _content) {
153 if (i->video || (i->subtitle && i->subtitle->burn_subtitles())) {
154 t += i->identifier ();
158 MD5Digester digester;
159 digester.add (t.c_str(), t.length());
160 return digester.get ();
163 /** @param node <Playlist> node */
165 Playlist::set_from_xml (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, list<string>& notes)
167 BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Content")) {
168 _content.push_back (content_factory (film, i, version, notes));
171 /* This shouldn't be necessary but better safe than sorry (there could be old files) */
172 sort (_content.begin(), _content.end(), ContentSorter ());
177 /** @param node <Playlist> node */
179 Playlist::as_xml (xmlpp::Node* node)
181 BOOST_FOREACH (shared_ptr<Content> i, _content) {
182 i->as_xml (node->add_child ("Content"));
187 Playlist::add (shared_ptr<Content> c)
189 _content.push_back (c);
190 sort (_content.begin(), _content.end(), ContentSorter ());
196 Playlist::remove (shared_ptr<Content> c)
198 ContentList::iterator i = _content.begin ();
199 while (i != _content.end() && *i != c) {
203 if (i != _content.end ()) {
208 /* This won't change order, so it does not need a sort */
212 Playlist::remove (ContentList c)
214 BOOST_FOREACH (shared_ptr<Content> i, c) {
215 ContentList::iterator j = _content.begin ();
216 while (j != _content.end() && *j != i) {
220 if (j != _content.end ()) {
225 /* This won't change order, so it does not need a sort */
230 class FrameRateCandidate
233 FrameRateCandidate (float source_, int dcp_)
243 Playlist::best_dcp_frame_rate () const
245 list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
247 /* Work out what rates we could manage, including those achieved by using skip / repeat */
248 list<FrameRateCandidate> candidates;
250 /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
251 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
252 candidates.push_back (FrameRateCandidate (*i, *i));
255 /* Then the skip/repeat ones */
256 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
257 candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
258 candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
261 /* Pick the best one */
262 float error = std::numeric_limits<float>::max ();
263 optional<FrameRateCandidate> best;
264 list<FrameRateCandidate>::iterator i = candidates.begin();
265 while (i != candidates.end()) {
267 float this_error = 0;
268 BOOST_FOREACH (shared_ptr<Content> j, _content) {
269 if (!j->video || !j->video->has_own_video_frame_rate()) {
273 /* Best error for this content; we could use the content as-is or double its rate */
274 float best_error = min (
275 float (fabs (i->source - j->video->video_frame_rate ())),
276 float (fabs (i->source - j->video->video_frame_rate () * 2))
279 /* Use the largest difference between DCP and source as the "error" */
280 this_error = max (this_error, best_error);
283 if (this_error < error) {
298 /** @return length of the playlist from time 0 to the last thing on the playlist */
300 Playlist::length () const
303 BOOST_FOREACH (shared_ptr<const Content> i, _content) {
304 len = max (len, i->end());
310 /** @return position of the first thing on the playlist, if it's not empty */
312 Playlist::start () const
314 if (_content.empty ()) {
315 return optional<DCPTime> ();
318 DCPTime start = DCPTime::max ();
319 BOOST_FOREACH (shared_ptr<Content> i, _content) {
320 start = min (start, i->position ());
327 Playlist::reconnect ()
329 for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
333 _content_connections.clear ();
335 BOOST_FOREACH (shared_ptr<Content> i, _content) {
336 _content_connections.push_back (i->Changed.connect (bind (&Playlist::content_changed, this, _1, _2, _3)));
341 Playlist::video_end () const
344 BOOST_FOREACH (shared_ptr<Content> i, _content) {
346 end = max (end, i->end ());
354 Playlist::subtitle_end () const
357 BOOST_FOREACH (shared_ptr<Content> i, _content) {
359 end = max (end, i->end ());
367 Playlist::active_frame_rate_change (DCPTime t, int dcp_video_frame_rate) const
369 for (ContentList::const_reverse_iterator i = _content.rbegin(); i != _content.rend(); ++i) {
374 if ((*i)->position() <= t) {
375 /* This is the first piece of content (going backwards...) that starts before t,
376 so it's the active one.
378 return FrameRateChange ((*i)->video->video_frame_rate(), dcp_video_frame_rate);
382 return FrameRateChange (dcp_video_frame_rate, dcp_video_frame_rate);
386 Playlist::set_sequence (bool s)
392 ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
394 if (a->position() != b->position()) {
395 return a->position() < b->position();
398 /* Put video before audio if they start at the same time */
399 if (a->video && !b->video) {
401 } else if (!a->video && b->video) {
406 return a->digest() < b->digest();
409 /** @return content in ascending order of position */
411 Playlist::content () const
417 Playlist::repeat (ContentList c, int n)
419 pair<DCPTime, DCPTime> range (DCPTime::max (), DCPTime ());
420 BOOST_FOREACH (shared_ptr<Content> i, c) {
421 range.first = min (range.first, i->position ());
422 range.second = max (range.second, i->position ());
423 range.first = min (range.first, i->end ());
424 range.second = max (range.second, i->end ());
427 DCPTime pos = range.second;
428 for (int i = 0; i < n; ++i) {
429 BOOST_FOREACH (shared_ptr<Content> j, c) {
430 shared_ptr<Content> copy = j->clone ();
431 copy->set_position (pos + copy->position() - range.first);
432 _content.push_back (copy);
434 pos += range.second - range.first;
437 sort (_content.begin(), _content.end(), ContentSorter ());
444 Playlist::move_earlier (shared_ptr<Content> c)
446 ContentList::iterator previous = _content.end ();
447 ContentList::iterator i = _content.begin();
448 while (i != _content.end() && *i != c) {
453 DCPOMATIC_ASSERT (i != _content.end ());
454 if (previous == _content.end ()) {
458 shared_ptr<Content> previous_c = *previous;
460 DCPTime const p = previous_c->position ();
461 previous_c->set_position (p + c->length_after_trim ());
466 Playlist::move_later (shared_ptr<Content> c)
468 ContentList::iterator i = _content.begin();
469 while (i != _content.end() && *i != c) {
473 DCPOMATIC_ASSERT (i != _content.end ());
475 ContentList::iterator next = i;
478 if (next == _content.end ()) {
482 shared_ptr<Content> next_c = *next;
484 next_c->set_position (c->position ());
485 c->set_position (c->position() + next_c->length_after_trim ());
489 Playlist::required_disk_space (int j2k_bandwidth, int audio_channels, int audio_frame_rate) const
491 int64_t video = uint64_t (j2k_bandwidth / 8) * length().seconds ();
492 int64_t audio = uint64_t (audio_channels * audio_frame_rate * 3) * length().seconds ();
494 BOOST_FOREACH (shared_ptr<Content> i, _content) {
495 shared_ptr<DCPContent> d = dynamic_pointer_cast<DCPContent> (i);
497 if (d->reference_video()) {
498 video -= uint64_t (j2k_bandwidth / 8) * d->length_after_trim().seconds();
500 if (d->reference_audio()) {
501 audio -= uint64_t (audio_channels * audio_frame_rate * 3) * d->length_after_trim().seconds();
506 /* Add on 64k for bits and pieces (metadata, subs etc) */
507 return video + audio + 65536;