1 files changed, 330 insertions, 0 deletions
diff --git a/src/lib/playlist.cc b/src/lib/playlist.cc
new file mode 100644
index 000000000..de48ff5f5
--- /dev/null
+++ b/src/lib/playlist.cc
@@ -0,0 +1,330 @@
+/*
+    Copyright (C) 2013 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <libcxml/cxml.h>
+#include <boost/shared_ptr.hpp>
+#include <boost/lexical_cast.hpp>
+#include "playlist.h"
+#include "sndfile_content.h"
+#include "sndfile_decoder.h"
+#include "video_content.h"
+#include "ffmpeg_decoder.h"
+#include "ffmpeg_content.h"
+#include "still_image_decoder.h"
+#include "still_image_content.h"
+#include "content_factory.h"
+#include "job.h"
+#include "config.h"
+#include "util.h"
+
+#include "i18n.h"
+
+using std::list;
+using std::cout;
+using std::vector;
+using std::min;
+using std::max;
+using std::string;
+using std::stringstream;
+using std::pair;
+using boost::optional;
+using boost::shared_ptr;
+using boost::weak_ptr;
+using boost::dynamic_pointer_cast;
+using boost::lexical_cast;
+
+Playlist::Playlist ()
+	: _sequence_video (true)
+	, _sequencing_video (false)
+{
+
+}
+
+Playlist::~Playlist ()
+{
+	_content.clear ();
+	reconnect ();
+}
+
+void
+Playlist::content_changed (weak_ptr<Content> content, int property, bool frequent)
+{
+	if (property == ContentProperty::LENGTH) {
+		maybe_sequence_video ();
+	}
+	
+	ContentChanged (content, property, frequent);
+}
+
+void
+Playlist::maybe_sequence_video ()
+{
+	if (!_sequence_video || _sequencing_video) {
+		return;
+	}
+	
+	_sequencing_video = true;
+	
+	ContentList cl = _content;
+	sort (cl.begin(), cl.end(), ContentSorter ());
+	Time last = 0;
+	for (ContentList::iterator i = cl.begin(); i != cl.end(); ++i) {
+		if (!dynamic_pointer_cast<VideoContent> (*i)) {
+			continue;
+		}
+		
+		(*i)->set_position (last);
+		last = (*i)->end ();
+	}
+	
+	_sequencing_video = false;
+}
+
+string
+Playlist::video_identifier () const
+{
+	string t;
+	
+	for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
+		shared_ptr<const VideoContent> vc = dynamic_pointer_cast<const VideoContent> (*i);
+		if (vc) {
+			t += vc->identifier ();
+		}
+	}
+
+	return md5_digest (t.c_str(), t.length());
+}
+
+/** @param node <Playlist> node */
+void
+Playlist::set_from_xml (shared_ptr<const Film> film, shared_ptr<const cxml::Node> node)
+{
+	list<shared_ptr<cxml::Node> > c = node->node_children ("Content");
+	for (list<shared_ptr<cxml::Node> >::iterator i = c.begin(); i != c.end(); ++i) {
+		_content.push_back (content_factory (film, *i));
+	}
+
+	reconnect ();
+}
+
+/** @param node <Playlist> node */
+void
+Playlist::as_xml (xmlpp::Node* node)
+{
+	for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
+		(*i)->as_xml (node->add_child ("Content"));
+	}
+}
+
+void
+Playlist::add (shared_ptr<Content> c)
+{
+	_content.push_back (c);
+	reconnect ();
+	Changed ();
+}
+
+void
+Playlist::remove (shared_ptr<Content> c)
+{
+	ContentList::iterator i = _content.begin ();
+	while (i != _content.end() && *i != c) {
+		++i;
+	}
+	
+	if (i != _content.end ()) {
+		_content.erase (i);
+		Changed ();
+	}
+}
+
+void
+Playlist::remove (ContentList c)
+{
+	for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
+		ContentList::iterator j = _content.begin ();
+		while (j != _content.end() && *j != *i) {
+			++j;
+		}
+	
+		if (j != _content.end ()) {
+			_content.erase (j);
+		}
+	}
+
+	Changed ();
+}
+
+bool
+Playlist::has_subtitles () const
+{
+	for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
+		shared_ptr<const FFmpegContent> fc = dynamic_pointer_cast<FFmpegContent> (*i);
+		if (fc && !fc->subtitle_streams().empty()) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+class FrameRateCandidate
+{
+public:
+	FrameRateCandidate (float source_, int dcp_)
+		: source (source_)
+		, dcp (dcp_)
+	{}
+
+	float source;
+	int dcp;
+};
+
+int
+Playlist::best_dcp_frame_rate () const
+{
+	list<int> const allowed_dcp_frame_rates = Config::instance()->allowed_dcp_frame_rates ();
+
+	/* Work out what rates we could manage, including those achieved by using skip / repeat. */
+	list<FrameRateCandidate> candidates;
+
+	/* Start with the ones without skip / repeat so they will get matched in preference to skipped/repeated ones */
+	for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
+		candidates.push_back (FrameRateCandidate (*i, *i));
+	}
+
+	/* Then the skip/repeat ones */
+	for (list<int>::const_iterator i = allowed_dcp_frame_rates.begin(); i != allowed_dcp_frame_rates.end(); ++i) {
+		candidates.push_back (FrameRateCandidate (float (*i) / 2, *i));
+		candidates.push_back (FrameRateCandidate (float (*i) * 2, *i));
+	}
+
+	/* Pick the best one */
+	float error = std::numeric_limits<float>::max ();
+	optional<FrameRateCandidate> best;
+	list<FrameRateCandidate>::iterator i = candidates.begin();
+	while (i != candidates.end()) {
+
+		float this_error = 0;
+		for (ContentList::const_iterator j = _content.begin(); j != _content.end(); ++j) {
+			shared_ptr<VideoContent> vc = dynamic_pointer_cast<VideoContent> (*j);
+			if (!vc) {
+				continue;
+			}
+
+			/* Use the largest difference between DCP and source as the "error" */
+			this_error = max (this_error, float (fabs (i->source - vc->video_frame_rate ())));
+		}
+
+		if (this_error < error) {
+			error = this_error;
+			best = *i;
+		}
+
+		++i;
+	}
+
+	if (!best) {
+		return 24;
+	}
+	
+	return best->dcp;
+}
+
+Time
+Playlist::length () const
+{
+	Time len = 0;
+	for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
+		len = max (len, (*i)->end ());
+	}
+
+	return len;
+}
+
+void
+Playlist::reconnect ()
+{
+	for (list<boost::signals2::connection>::iterator i = _content_connections.begin(); i != _content_connections.end(); ++i) {
+		i->disconnect ();
+	}
+
+	_content_connections.clear ();
+		
+	for (ContentList::iterator i = _content.begin(); i != _content.end(); ++i) {
+		_content_connections.push_back ((*i)->Changed.connect (bind (&Playlist::content_changed, this, _1, _2, _3)));
+	}
+}
+
+Time
+Playlist::video_end () const
+{
+	Time end = 0;
+	for (ContentList::const_iterator i = _content.begin(); i != _content.end(); ++i) {
+		if (dynamic_pointer_cast<const VideoContent> (*i)) {
+			end = max (end, (*i)->end ());
+		}
+	}
+
+	return end;
+}
+
+void
+Playlist::set_sequence_video (bool s)
+{
+	_sequence_video = s;
+}
+
+bool
+ContentSorter::operator() (shared_ptr<Content> a, shared_ptr<Content> b)
+{
+	return a->position() < b->position();
+}
+
+/** @return content in an undefined order */
+ContentList
+Playlist::content () const
+{
+	return _content;
+}
+
+void
+Playlist::repeat (ContentList c, int n)
+{
+	pair<Time, Time> range (TIME_MAX, 0);
+	for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
+		range.first = min (range.first, (*i)->position ());
+		range.second = max (range.second, (*i)->position ());
+		range.first = min (range.first, (*i)->end ());
+		range.second = max (range.second, (*i)->end ());
+	}
+
+	Time pos = range.second;
+	for (int i = 0; i < n; ++i) {
+		for (ContentList::iterator i = c.begin(); i != c.end(); ++i) {
+			shared_ptr<Content> copy = (*i)->clone ();
+			copy->set_position (pos + copy->position() - range.first);
+			_content.push_back (copy);
+		}
+		pos += range.second - range.first;
+	}
+
+	reconnect ();
+	Changed ();
+}