1 files changed, 117 insertions, 0 deletions
diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
new file mode 100644
index 000000000..7a5da7d2a
--- /dev/null
+++ b/src/lib/audio_mapping.cc
@@ -0,0 +1,117 @@
+/*
+    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 <boost/lexical_cast.hpp>
+#include <libxml++/libxml++.h>
+#include <libcxml/cxml.h>
+#include "audio_mapping.h"
+
+using std::list;
+using std::cout;
+using std::make_pair;
+using std::pair;
+using std::string;
+using boost::shared_ptr;
+using boost::lexical_cast;
+using boost::dynamic_pointer_cast;
+
+AudioMapping::AudioMapping ()
+	: _content_channels (0)
+{
+
+}
+
+/** Create a default AudioMapping for a given channel count.
+ *  @param c Number of channels.
+ */
+AudioMapping::AudioMapping (int c)
+	: _content_channels (c)
+{
+
+}
+
+void
+AudioMapping::make_default ()
+{
+	if (_content_channels == 1) {
+		/* Mono -> Centre */
+		add (0, libdcp::CENTRE);
+	} else {
+		/* 1:1 mapping */
+		for (int i = 0; i < _content_channels; ++i) {
+			add (i, static_cast<libdcp::Channel> (i));
+		}
+	}
+}
+
+AudioMapping::AudioMapping (shared_ptr<const cxml::Node> node)
+{
+	_content_channels = node->number_child<int> ("ContentChannels");
+	
+	list<shared_ptr<cxml::Node> > const c = node->node_children ("Map");
+	for (list<shared_ptr<cxml::Node> >::const_iterator i = c.begin(); i != c.end(); ++i) {
+		add ((*i)->number_child<int> ("ContentIndex"), static_cast<libdcp::Channel> ((*i)->number_child<int> ("DCP")));
+	}
+}
+
+void
+AudioMapping::add (int c, libdcp::Channel d)
+{
+	_content_to_dcp.push_back (make_pair (c, d));
+}
+
+list<int>
+AudioMapping::dcp_to_content (libdcp::Channel d) const
+{
+	list<int> c;
+	for (list<pair<int, libdcp::Channel> >::const_iterator i = _content_to_dcp.begin(); i != _content_to_dcp.end(); ++i) {
+		if (i->second == d) {
+			c.push_back (i->first);
+		}
+	}
+
+	return c;
+}
+
+list<libdcp::Channel>
+AudioMapping::content_to_dcp (int c) const
+{
+	assert (c < _content_channels);
+	
+	list<libdcp::Channel> d;
+	for (list<pair<int, libdcp::Channel> >::const_iterator i = _content_to_dcp.begin(); i != _content_to_dcp.end(); ++i) {
+		if (i->first == c) {
+			d.push_back (i->second);
+		}
+	}
+
+	return d;
+}
+
+void
+AudioMapping::as_xml (xmlpp::Node* node) const
+{
+	node->add_child ("ContentChannels")->add_child_text (lexical_cast<string> (_content_channels));
+	
+	for (list<pair<int, libdcp::Channel> >::const_iterator i = _content_to_dcp.begin(); i != _content_to_dcp.end(); ++i) {
+		xmlpp::Node* t = node->add_child ("Map");
+		t->add_child ("ContentIndex")->add_child_text (lexical_cast<string> (i->first));
+		t->add_child ("DCP")->add_child_text (lexical_cast<string> (i->second));
+	}
+}