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> c, int p)
75 if (p == ContentProperty::LENGTH) {
76 maybe_sequence_video ();
79 ContentChanged (c, p);
83 Playlist::maybe_sequence_video ()
85 if (!_sequence_video || _sequencing_video) {
89 _sequencing_video = true;
91 ContentList cl = _content;
92 sort (cl.begin(), cl.end(), ContentSorter ());
94 for (ContentList::iterator i = cl.begin(); i != cl.end(); ++i) {
95 if (!dynamic_pointer_cast<VideoContent> (*i)) {
99 (*i)->set_start (last);
103 _sequencing_video = false;
107 Playlist::video_identifier () const
111 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
112 shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
114 t += vc->identifier ();
118 t += lexical_cast<string> (_loop);
120 return md5_digest (t.c_str(), t.length());
123 /** @param node <Playlist> node */
125 Playlist::set_from_xml (shared_ptr<const Film> film, shared_ptr<const cxml::Node> node)
127 list<shared_ptr<cxml::Node> > c = node->node_children ("Content");
128 for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
129 string const type = (*i)->string_child ("Type");
131 boost::shared_ptr<Content> content;
133 if (type == "FFmpeg") {
134 content.reset (new FFmpegContent (film, *i));
135 } else if (type == "ImageMagick") {
136 content.reset (new ImageMagickContent (film, *i));
137 } else if (type == "Sndfile") {
138 content.reset (new SndfileContent (film, *i));
141 _content.push_back (content);
145 _loop = node->number_child<int> ("Loop");
146 _sequence_video = node->bool_child ("SequenceVideo");
149 /** @param node <Playlist> node */
151 Playlist::as_xml (xmlpp::Node* node)
153 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
154 (*i)->as_xml (node->add_child ("Content"));
157 node->add_child("Loop")->add_child_text(lexical_cast<string> (_loop));
158 node->add_child("SequenceVideo")->add_child_text(_sequence_video ? "1" : "0");
162 Playlist::add (shared_ptr<Content> c)
164 _content.push_back (c);
170 Playlist::remove (shared_ptr<Content> c)
172 ContentList::iterator i = _content.begin ();
173 while (i != _content.end() && *i != c) {
177 if (i != _content.end ()) {
184 Playlist::set_loop (int l)
191 Playlist::has_subtitles () const
193 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
194 shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<FFmpegContent> (*i);
195 if (fc && !fc->subtitle_streams().empty()) {
203 class FrameRateCandidate
206 FrameRateCandidate (float source_, int dcp_)
216 Playlist::best_dcp_frame_rate () const
218 list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
220 /* Work out what rates we could manage, including those achieved by using skip / repeat. */
221 list<FrameRateCandidate> candidates;
223 /* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
224 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
225 candidates.push_back (FrameRateCandidate (*i, *i));
228 /* Then the skip/repeat ones */
229 for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
230 candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
231 candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
234 /* Pick the best one, bailing early if we hit an exact match */
235 float error = std::numeric_limits<float>::max ();
236 optional<FrameRateCandidate> best;
237 list<FrameRateCandidate>::iterator i = candidates.begin();
238 while (i != candidates.end()) {
240 float this_error = 0;
241 for (ContentList::const_iterator j = _content.begin(); j != _content.end(); ++j) {
242 shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*j);
247 this_error += fabs (i->source - vc->video_frame_rate ());
250 if (this_error < error) {
266 Playlist::length () const
269 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
270 len = max (len, (*i)->end ());
277 Playlist::reconnect ()
279 for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
283 _content_connections.clear ();
285 for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
286 _content_connections.push_back ((*i)->Changed.connect (bind (&Playlist::content_changed, this, _1, _2)));
291 Playlist::video_end () const
294 for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
295 if (dynamic_pointer_cast<const VideoContent> (*i)) {
296 end = max (end, (*i)->end ());
304 Playlist::set_sequence_video (bool s)
310 ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
312 return a->start() < b->start();