From 8750efb9e072cf3b42e6c3c29521c7031c0b5dfd Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Sat, 6 Apr 2013 14:42:08 +0100
Subject: Basics of content dialogs.

---
 src/lib/audio_mapping.cc | 103 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/lib/audio_mapping.cc

(limited to 'src/lib/audio_mapping.cc')

diff --git a/src/lib/audio_mapping.cc b/src/lib/audio_mapping.cc
new file mode 100644
index 000000000..3fc423e10
--- /dev/null
+++ b/src/lib/audio_mapping.cc
@@ -0,0 +1,103 @@
+/*
+    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 "audio_mapping.h"
+
+using std::map;
+using boost::optional;
+
+AutomaticAudioMapping::AutomaticAudioMapping (int c)
+	: _source_channels (c)
+{
+
+}
+
+optional<libdcp::Channel>
+AutomaticAudioMapping::source_to_dcp (int c) const
+{
+	if (c >= _source_channels) {
+		return optional<libdcp::Channel> ();
+	}
+
+	if (_source_channels == 1) {
+		/* mono sources to centre */
+		return libdcp::CENTRE;
+	}
+	
+	return static_cast<libdcp::Channel> (c);
+}
+
+optional<int>
+AutomaticAudioMapping::dcp_to_source (libdcp::Channel c) const
+{
+	if (_source_channels == 1) {
+		if (c == libdcp::CENTRE) {
+			return 0;
+		} else {
+			return optional<int> ();
+		}
+	}
+
+	if (static_cast<int> (c) >= _source_channels) {
+		return optional<int> ();
+	}
+	
+	return static_cast<int> (c);
+}
+
+int
+AutomaticAudioMapping::dcp_channels () const
+{
+	if (_source_channels == 1) {
+		/* The source is mono, so to put the mono channel into
+		   the centre we need to generate a 5.1 soundtrack.
+		*/
+		return 6;
+	}
+
+	return _source_channels;
+}
+
+optional<int>
+ConfiguredAudioMapping::dcp_to_source (libdcp::Channel c) const
+{
+	map<int, libdcp::Channel>::const_iterator i = _source_to_dcp.begin ();
+	while (i != _source_to_dcp.end() && i->second != c) {
+		++i;
+	}
+
+	if (i == _source_to_dcp.end ()) {
+		return boost::none;
+	}
+
+	return i->first;
+}
+
+optional<libdcp::Channel>
+ConfiguredAudioMapping::source_to_dcp (int c) const
+{
+	map<int, libdcp::Channel>::const_iterator i = _source_to_dcp.find (c);
+	if (i == _source_to_dcp.end ()) {
+		return boost::none;
+	}
+
+	return i->second;
+}
+
+	
-- 
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