From c25962aa7ed14573de1f7839b00bf67bc9e7e03f Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Fri, 1 Apr 2016 22:54:00 +0200
Subject: [PATCH] add chan-mapping count/size()

---
 libs/ardour/ardour/chan_mapping.h |  2 ++
 libs/ardour/chan_mapping.cc       | 11 +++++++++++
 2 files changed, 13 insertions(+)

diff --git a/libs/ardour/ardour/chan_mapping.h b/libs/ardour/ardour/chan_mapping.h
index f73408baec..88cdf44408 100644
--- a/libs/ardour/ardour/chan_mapping.h
+++ b/libs/ardour/ardour/chan_mapping.h
@@ -86,6 +86,8 @@ public:
 	 */
 	bool     is_monotonic () const;
 
+	uint32_t count () const;
+
 	/** Test if this mapping is a subset
 	 * @param superset to test against
 	 * @returns true if all mapping are also present in the superset
diff --git a/libs/ardour/chan_mapping.cc b/libs/ardour/chan_mapping.cc
index 6386c2863b..9e69294fdb 100644
--- a/libs/ardour/chan_mapping.cc
+++ b/libs/ardour/chan_mapping.cc
@@ -184,6 +184,17 @@ ChanMapping::is_identity (ChanCount offset) const
 	return true;
 }
 
+uint32_t
+ChanMapping::count () const
+{
+	uint32_t rv = 0;
+	const Mappings& mp (mappings());
+	for (Mappings::const_iterator tm = mp.begin(); tm != mp.end(); ++tm) {
+		rv += tm->second.size ();
+	}
+	return rv;
+}
+
 } // namespace ARDOUR
 
 std::ostream& operator<<(std::ostream& o, const ARDOUR::ChanMapping& cm)