provide semantic ordering of simultaneous MIDI events; add operator== to MidiBuffer iterator; add empty() to MidiBuffer for no particular reason

git-svn-id: svn://localhost/ardour2/branches/3.0@10846 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 3 insertions, 0 deletions

diff --git a/libs/ardour/ardour/buffer.h b/libs/ardour/ardour/buffer.h
index 4775f24e95..15e97ccc10 100644
--- a/libs/ardour/ardour/buffer.h
+++ b/libs/ardour/ardour/buffer.h
@@ -56,6 +56,9 @@ public:
 	/** Amount of valid data in buffer.  Use this over capacity almost always. */
 	size_t size() const { return _size; }
 
+	/** Return true if the buffer contains no data, false otherwise */
+	virtual bool empty() const { return _size == 0; }
+
 	/** Type of this buffer.
 	 * Based on this you can static cast a Buffer* to the desired type. */
 	DataType type() const { return _type; }