1 files changed, 35 insertions, 0 deletions
diff --git a/src/db/LightSong.cxx b/src/db/LightSong.cxx
new file mode 100644
index 000000000..5cdebc133
--- /dev/null
+++ b/src/db/LightSong.cxx
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "LightSong.hxx"
+#include "tag/Tag.hxx"
+
+SignedSongTime
+LightSong::GetDuration() const
+{
+	SongTime a = start_time, b = end_time;
+	if (!b.IsPositive()) {
+		if (tag->duration.IsNegative())
+			return tag->duration;
+
+		b = SongTime(tag->duration);
+	}
+
+	return SignedSongTime(b - a);
+}