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>
22 #include <boost/lexical_cast.hpp>
24 #include "sndfile_content.h"
25 #include "sndfile_decoder.h"
26 #include "video_content.h"
27 #include "ffmpeg_decoder.h"
28 #include "ffmpeg_content.h"
29 #include "imagemagick_decoder.h"
30 #include "imagemagick_content.h"
43 using std::stringstream;
44 using boost::optional;
45 using boost::shared_ptr;
46 using boost::weak_ptr;
47 using boost::dynamic_pointer_cast;
48 using boost::lexical_cast;
52 , _sequence_video (true)
53 , _sequencing_video (false)
58 Playlist::Playlist (shared_ptr<const Playlist> other)
59 : _loop (other->_loop)
61 for (ContentList::const_iterator i = other->_content.begin(); i != other->_content.end(); ++i) {
62 _content.push_back ((*i)->clone ());
66 Playlist::~Playlist ()
73 Playlist::content_changed (weak_ptr<Content> content, int property, bool frequent)
75 if (property == ContentProperty::LENGTH) {
76 maybe_sequence_video ();
79 ContentChanged (content, property, frequent);
84 Playlist::maybe_sequence_video ()
86 if (!_sequence_video || _sequencing_video) {
90 _sequencing_video = true;
92 ContentList cl = _content;
93 sort (cl.begin(), cl.end(), ContentSorter ());
95 for (ContentList::iterator i = cl.begin(); i != cl.end(); ++i) {
96 if (!dynamic_pointer_cast<VideoContent> (*i)) {
100 (*i)->set_start (last);
104 _sequencing_video = false;
108 Playlist::video_identifier () const
112 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
113 shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
115 t += vc->identifier ();
119 t += lexical_cast<string> (_loop);
121 return md5_digest (t.c_str(), t.length());
124 /** @param node <Playlist> node */
126 Playlist::set_from_xml (shared_ptr<const Film> film, shared_ptr<const cxml::Node> node)
128 list<shared_ptr<cxml::Node> > c = node->node_children ("Content");
129 for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
130 string const type = (*i)->string_child ("Type");
132 boost::shared_ptr<Content> content;
134 if (type == "FFmpeg") {
135 content.reset (new FFmpegContent (film, *i));
136 } else if (type == "ImageMagick") {
137 content.reset (new ImageMagickContent (film, *i));
138 } else if (type == "Sndfile") {
139 content.reset (new SndfileContent (film, *i));
142 _content.push_back (content);
146 _loop = node->number_child<int> ("Loop");
147 _sequence_video = node->bool_child ("SequenceVideo");
150 /** @param node <Playlist> node */
152 Playlist::as_xml (xmlpp::Node* node)
154 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
155 (*i)->as_xml (node->add_child ("Content"));
158 node->add_child("Loop")->add_child_text(lexical_cast<string> (_loop));
159 node->add_child("SequenceVideo")->add_child_text(_sequence_video ? "1" : "0");
163 Playlist::add (shared_ptr<Content> c)
165 _content.push_back (c);
171 Playlist::remove (shared_ptr<Content> c)
173 ContentList::iterator i = _content.begin ();
174 while (i != _content.end() && *i != c) {
178 if (i != _content.end ()) {
185 Playlist::set_loop (int l)
192 Playlist::has_subtitles () const
194 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
195 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<FFmpegContent> (*i);
196 if (fc && !fc->subtitle_streams().empty()) {
204 class FrameRateCandidate
207 FrameRateCandidate (float source_, int dcp_)
217 Playlist::best_dcp_frame_rate () const
219 list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
221 /* Work out what rates we could manage, including those achieved by using skip / repeat. */
222 list<FrameRateCandidate> candidates;
224 /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
225 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
226 candidates.push_back (FrameRateCandidate (*i, *i));
229 /* Then the skip/repeat ones */
230 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
231 candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
232 candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
235 /* Pick the best one */
236 float error = std::numeric_limits<float>::max ();
237 optional<FrameRateCandidate> best;
238 list<FrameRateCandidate>::iterator i = candidates.begin();
239 while (i != candidates.end()) {
241 float this_error = 0;
242 for (ContentList::const_iterator j = _content.begin(); j != _content.end(); ++j) {
243 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*j);
248 /* Use the largest difference between DCP and source as the "error" */
249 this_error = max (this_error, float (fabs (i->source - vc->video_frame_rate ())));
252 if (this_error < error) {
268 Playlist::length () const
271 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
272 len = max (len, (*i)->end ());
279 Playlist::reconnect ()
281 for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
285 _content_connections.clear ();
287 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
288 _content_connections.push_back ((*i)->Changed.connect (bind (&Playlist::content_changed, this, _1, _2, _3)));
293 Playlist::video_end () const
296 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
297 if (dynamic_pointer_cast<const VideoContent> (*i)) {
298 end = max (end, (*i)->end ());
306 Playlist::set_sequence_video (bool s)
312 ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
314 return a->start() < b->start();