2 Copyright (C) 2013 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.
20 #include <libcxml/cxml.h>
21 #include <boost/shared_ptr.hpp>
23 #include "sndfile_content.h"
24 #include "sndfile_decoder.h"
25 #include "video_content.h"
26 #include "ffmpeg_decoder.h"
27 #include "ffmpeg_content.h"
28 #include "image_decoder.h"
29 #include "content_factory.h"
33 #include "md5_digester.h"
44 using boost::optional;
45 using boost::shared_ptr;
46 using boost::weak_ptr;
47 using boost::dynamic_pointer_cast;
50 : _sequence_video (true)
51 , _sequencing_video (false)
56 Playlist::~Playlist ()
63 Playlist::content_changed (weak_ptr<Content> content, int property, bool frequent)
65 if (property == ContentProperty::LENGTH || property == VideoContentProperty::VIDEO_FRAME_TYPE) {
66 maybe_sequence_video ();
69 ContentChanged (content, property, frequent);
73 Playlist::maybe_sequence_video ()
75 if (!_sequence_video || _sequencing_video) {
79 _sequencing_video = true;
81 ContentList cl = _content;
84 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
85 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*i);
90 if (vc->video_frame_type() == VIDEO_FRAME_TYPE_3D_RIGHT) {
91 vc->set_position (next_right);
92 next_right = vc->end() + DCPTime::delta ();
94 vc->set_position (next_left);
95 next_left = vc->end() + DCPTime::delta ();
99 /* This won't change order, so it does not need a sort */
101 _sequencing_video = false;
105 Playlist::video_identifier () const
109 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
110 shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
112 t += vc->identifier ();
116 MD5Digester digester;
117 digester.add (t.c_str(), t.length());
118 return digester.get ();
121 /** @param node <Playlist> node */
123 Playlist::set_from_xml (shared_ptr<const Film> film, cxml::ConstNodePtr node, int version, list<string>& notes)
125 list<cxml::NodePtr> c = node->node_children ("Content");
126 for (list<cxml::NodePtr>::iterator i = c.begin(); i != c.end(); ++i) {
127 _content.push_back (content_factory (film, *i, version, notes));
130 sort (_content.begin(), _content.end(), ContentSorter ());
135 /** @param node <Playlist> node */
137 Playlist::as_xml (xmlpp::Node* node)
139 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
140 (*i)->as_xml (node->add_child ("Content"));
145 Playlist::add (shared_ptr<Content> c)
147 _content.push_back (c);
148 sort (_content.begin(), _content.end(), ContentSorter ());
154 Playlist::remove (shared_ptr<Content> c)
156 ContentList::iterator i = _content.begin ();
157 while (i != _content.end() && *i != c) {
161 if (i != _content.end ()) {
166 /* This won't change order, so it does not need a sort */
170 Playlist::remove (ContentList c)
172 for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
173 ContentList::iterator j = _content.begin ();
174 while (j != _content.end() && *j != *i) {
178 if (j != _content.end ()) {
183 /* This won't change order, so it does not need a sort */
188 class FrameRateCandidate
191 FrameRateCandidate (float source_, int dcp_)
201 Playlist::best_dcp_frame_rate () const
203 list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
205 /* Work out what rates we could manage, including those achieved by using skip / repeat. */
206 list<FrameRateCandidate> candidates;
208 /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
209 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
210 candidates.push_back (FrameRateCandidate (*i, *i));
213 /* Then the skip/repeat ones */
214 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
215 candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
216 candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
219 /* Pick the best one */
220 float error = std::numeric_limits<float>::max ();
221 optional<FrameRateCandidate> best;
222 list<FrameRateCandidate>::iterator i = candidates.begin();
223 while (i != candidates.end()) {
225 float this_error = 0;
226 for (ContentList::const_iterator j = _content.begin(); j != _content.end(); ++j) {
227 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*j);
232 /* Use the largest difference between DCP and source as the "error" */
233 this_error = max (this_error, float (fabs (i->source - vc->video_frame_rate ())));
236 if (this_error < error) {
252 Playlist::length () const
255 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
256 len = max (len, (*i)->end() + DCPTime::delta ());
263 Playlist::reconnect ()
265 for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
269 _content_connections.clear ();
271 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
272 _content_connections.push_back ((*i)->Changed.connect (bind (&Playlist::content_changed, this, _1, _2, _3)));
277 Playlist::video_end () const
280 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
281 if (dynamic_pointer_cast<const VideoContent> (*i)) {
282 end = max (end, (*i)->end ());
290 Playlist::active_frame_rate_change (DCPTime t, int dcp_video_frame_rate) const
292 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
293 shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
298 if (vc->position() >= t && t < vc->end()) {
299 return FrameRateChange (vc->video_frame_rate(), dcp_video_frame_rate);
303 return FrameRateChange (dcp_video_frame_rate, dcp_video_frame_rate);
307 Playlist::set_sequence_video (bool s)
313 ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
315 return a->position() < b->position();
318 /** @return content in an undefined order */
320 Playlist::content () const
326 Playlist::repeat (ContentList c, int n)
328 pair<DCPTime, DCPTime> range (DCPTime::max (), DCPTime ());
329 for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
330 range.first = min (range.first, (*i)->position ());
331 range.second = max (range.second, (*i)->position ());
332 range.first = min (range.first, (*i)->end ());
333 range.second = max (range.second, (*i)->end ());
336 DCPTime pos = range.second;
337 for (int i = 0; i < n; ++i) {
338 for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
339 shared_ptr<Content> copy = (*i)->clone ();
340 copy->set_position (pos + copy->position() - range.first);
341 _content.push_back (copy);
343 pos += range.second - range.first;
346 sort (_content.begin(), _content.end(), ContentSorter ());
353 Playlist::move_earlier (shared_ptr<Content> c)
355 sort (_content.begin(), _content.end(), ContentSorter ());
357 ContentList::iterator previous = _content.end ();
358 ContentList::iterator i = _content.begin();
359 while (i != _content.end() && *i != c) {
364 assert (i != _content.end ());
365 if (previous == _content.end ()) {
370 DCPTime const p = (*previous)->position ();
371 (*previous)->set_position (p + c->length_after_trim ());
373 sort (_content.begin(), _content.end(), ContentSorter ());
377 Playlist::move_later (shared_ptr<Content> c)
379 sort (_content.begin(), _content.end(), ContentSorter ());
381 ContentList::iterator i = _content.begin();
382 while (i != _content.end() && *i != c) {
386 assert (i != _content.end ());
388 ContentList::iterator next = i;
391 if (next == _content.end ()) {
395 (*next)->set_position (c->position ());
396 c->set_position (c->position() + c->length_after_trim ());
397 sort (_content.begin(), _content.end(), ContentSorter ());