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 "video_content.h"
22 #include "subtitle_content.h"
23 #include "ffmpeg_decoder.h"
24 #include "ffmpeg_content.h"
25 #include "image_decoder.h"
26 #include "content_factory.h"
27 #include "dcp_content.h"
31 #include "md5_digester.h"
32 #include <libcxml/cxml.h>
33 #include <libxml++/libxml++.h>
34 #include <boost/shared_ptr.hpp>
35 #include <boost/foreach.hpp>
47 using boost::optional;
48 using boost::shared_ptr;
49 using boost::weak_ptr;
50 using boost::dynamic_pointer_cast;
59 Playlist::~Playlist ()
66 Playlist::content_changed (weak_ptr<Content> content, int property, bool frequent)
68 if (property == ContentProperty::LENGTH || property == VideoContentProperty::FRAME_TYPE) {
69 /* Don't respond to position changes here, as:
70 - sequencing after earlier/later changes is handled by move_earlier/move_later
71 - any other position changes will be timeline drags which should not result in content
78 property == ContentProperty::POSITION ||
79 property == ContentProperty::LENGTH ||
80 property == ContentProperty::TRIM_START ||
81 property == ContentProperty::TRIM_END) {
83 ContentList old = _content;
84 sort (_content.begin(), _content.end(), ContentSorter ());
85 if (_content != old) {
90 ContentChanged (content, property, frequent);
94 Playlist::maybe_sequence ()
96 if (!_sequence || _sequencing) {
102 /* Keep track of the content that we've set the position of so that we don't
111 BOOST_FOREACH (shared_ptr<Content> i, _content) {
116 if (i->video->frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
117 i->set_position (next_right);
118 next_right = i->end();
120 i->set_position (next_left);
121 next_left = i->end();
124 placed.push_back (i);
130 BOOST_FOREACH (shared_ptr<Content> i, _content) {
131 if (!i->subtitle || find (placed.begin(), placed.end(), i) != placed.end()) {
135 i->set_position (next);
140 /* This won't change order, so it does not need a sort */
146 Playlist::video_identifier () const
150 BOOST_FOREACH (shared_ptr<const Content> i, _content) {
151 if (i->video || (i->subtitle && i->subtitle->burn())) {
152 t += i->identifier ();
156 MD5Digester digester;
157 digester.add (t.c_str(), t.length());
158 return digester.get ();
161 /** @param node <Playlist> node */
163 Playlist::set_from_xml (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, list<string>& notes)
165 BOOST_FOREACH (cxml::NodePtr i, node->node_children ("Content")) {
166 _content.push_back (content_factory (film, i, version, notes));
169 /* This shouldn't be necessary but better safe than sorry (there could be old files) */
170 sort (_content.begin(), _content.end(), ContentSorter ());
175 /** @param node <Playlist> node */
177 Playlist::as_xml (xmlpp::Node* node)
179 BOOST_FOREACH (shared_ptr<Content> i, _content) {
180 i->as_xml (node->add_child ("Content"));
185 Playlist::add (shared_ptr<Content> c)
187 _content.push_back (c);
188 sort (_content.begin(), _content.end(), ContentSorter ());
194 Playlist::remove (shared_ptr<Content> c)
196 ContentList::iterator i = _content.begin ();
197 while (i != _content.end() && *i != c) {
201 if (i != _content.end ()) {
206 /* This won't change order, so it does not need a sort */
210 Playlist::remove (ContentList c)
212 BOOST_FOREACH (shared_ptr<Content> i, c) {
213 ContentList::iterator j = _content.begin ();
214 while (j != _content.end() && *j != i) {
218 if (j != _content.end ()) {
223 /* This won't change order, so it does not need a sort */
228 class FrameRateCandidate
231 FrameRateCandidate (float source_, int dcp_)
241 Playlist::best_video_frame_rate () const
243 list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
245 /* Work out what rates we could manage, including those achieved by using skip / repeat */
246 list<FrameRateCandidate> candidates;
248 /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
249 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
250 candidates.push_back (FrameRateCandidate (*i, *i));
253 /* Then the skip/repeat ones */
254 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
255 candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
256 candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
259 /* Pick the best one */
260 float error = std::numeric_limits<float>::max ();
261 optional<FrameRateCandidate> best;
262 list<FrameRateCandidate>::iterator i = candidates.begin();
263 while (i != candidates.end()) {
265 float this_error = 0;
266 BOOST_FOREACH (shared_ptr<Content> j, _content) {
267 if (!j->video || !j->video_frame_rate()) {
271 /* Best error for this content; we could use the content as-is or double its rate */
272 float best_error = min (
273 float (fabs (i->source - j->video_frame_rate().get())),
274 float (fabs (i->source - j->video_frame_rate().get() * 2))
277 /* Use the largest difference between DCP and source as the "error" */
278 this_error = max (this_error, best_error);
281 if (this_error < error) {
296 /** @return length of the playlist from time 0 to the last thing on the playlist */
298 Playlist::length () const
301 BOOST_FOREACH (shared_ptr<const Content> i, _content) {
302 len = max (len, i->end());
308 /** @return position of the first thing on the playlist, if it's not empty */
310 Playlist::start () const
312 if (_content.empty ()) {
313 return optional<DCPTime> ();
316 DCPTime start = DCPTime::max ();
317 BOOST_FOREACH (shared_ptr<Content> i, _content) {
318 start = min (start, i->position ());
325 Playlist::reconnect ()
327 for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
331 _content_connections.clear ();
333 BOOST_FOREACH (shared_ptr<Content> i, _content) {
334 _content_connections.push_back (i->Changed.connect (bind (&Playlist::content_changed, this, _1, _2, _3)));
339 Playlist::video_end () const
342 BOOST_FOREACH (shared_ptr<Content> i, _content) {
344 end = max (end, i->end ());
352 Playlist::subtitle_end () const
355 BOOST_FOREACH (shared_ptr<Content> i, _content) {
357 end = max (end, i->end ());
365 Playlist::active_frame_rate_change (DCPTime t, int dcp_video_frame_rate) const
367 for (ContentList::const_reverse_iterator i = _content.rbegin(); i != _content.rend(); ++i) {
372 if ((*i)->position() <= t) {
373 /* This is the first piece of content (going backwards...) that starts before t,
374 so it's the active one.
376 if ((*i)->video_frame_rate ()) {
377 /* This content specified a rate, so use it */
378 return FrameRateChange ((*i)->video_frame_rate().get(), dcp_video_frame_rate);
380 /* No specified rate so just use the DCP one */
381 return FrameRateChange (dcp_video_frame_rate, dcp_video_frame_rate);
386 return FrameRateChange (dcp_video_frame_rate, dcp_video_frame_rate);
390 Playlist::set_sequence (bool s)
396 ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
398 if (a->position() != b->position()) {
399 return a->position() < b->position();
402 /* Put video before audio if they start at the same time */
403 if (a->video && !b->video) {
405 } else if (!a->video && b->video) {
410 return a->digest() < b->digest();
413 /** @return content in ascending order of position */
415 Playlist::content () const
421 Playlist::repeat (ContentList c, int n)
423 pair<DCPTime, DCPTime> range (DCPTime::max (), DCPTime ());
424 BOOST_FOREACH (shared_ptr<Content> i, c) {
425 range.first = min (range.first, i->position ());
426 range.second = max (range.second, i->position ());
427 range.first = min (range.first, i->end ());
428 range.second = max (range.second, i->end ());
431 DCPTime pos = range.second;
432 for (int i = 0; i < n; ++i) {
433 BOOST_FOREACH (shared_ptr<Content> j, c) {
434 shared_ptr<Content> copy = j->clone ();
435 copy->set_position (pos + copy->position() - range.first);
436 _content.push_back (copy);
438 pos += range.second - range.first;
441 sort (_content.begin(), _content.end(), ContentSorter ());
448 Playlist::move_earlier (shared_ptr<Content> c)
450 ContentList::iterator previous = _content.end ();
451 ContentList::iterator i = _content.begin();
452 while (i != _content.end() && *i != c) {
457 DCPOMATIC_ASSERT (i != _content.end ());
458 if (previous == _content.end ()) {
462 shared_ptr<Content> previous_c = *previous;
464 DCPTime const p = previous_c->position ();
465 previous_c->set_position (p + c->length_after_trim ());
470 Playlist::move_later (shared_ptr<Content> c)
472 ContentList::iterator i = _content.begin();
473 while (i != _content.end() && *i != c) {
477 DCPOMATIC_ASSERT (i != _content.end ());
479 ContentList::iterator next = i;
482 if (next == _content.end ()) {
486 shared_ptr<Content> next_c = *next;
488 next_c->set_position (c->position ());
489 c->set_position (c->position() + next_c->length_after_trim ());
493 Playlist::required_disk_space (int j2k_bandwidth, int audio_channels, int audio_frame_rate) const
495 int64_t video = uint64_t (j2k_bandwidth / 8) * length().seconds ();
496 int64_t audio = uint64_t (audio_channels * audio_frame_rate * 3) * length().seconds ();
498 BOOST_FOREACH (shared_ptr<Content> i, _content) {
499 shared_ptr<DCPContent> d = dynamic_pointer_cast<DCPContent> (i);
501 if (d->reference_video()) {
502 video -= uint64_t (j2k_bandwidth / 8) * d->length_after_trim().seconds();
504 if (d->reference_audio()) {
505 audio -= uint64_t (audio_channels * audio_frame_rate * 3) * d->length_after_trim().seconds();
510 /* Add on 64k for bits and pieces (metadata, subs etc) */
511 return video + audio + 65536;