add virtual Delivery::pan_outs() so that internal sends correctly configure their panner for the number of outputs on the target rather than the output of the internal send processor within the route. fixes a crash when adding internal sends

git-svn-id: svn://localhost/ardour2/branches/3.0@9975 d708f5d6-7413-0410-9779-e7cbd77b26cf

1 files changed, 23 insertions, 0 deletions

diff --git a/libs/ardour/internal_send.cc b/libs/ardour/internal_send.cc
index 7fe52ec617..e873b73aac 100644
--- a/libs/ardour/internal_send.cc
+++ b/libs/ardour/internal_send.cc
@@ -81,6 +81,13 @@ InternalSend::use_target (boost::shared_ptr<Route> sendto)
 	mixbufs.ensure_buffers (_send_to->internal_return()->input_streams(), _session.get_block_size());
 	mixbufs.set_count (_send_to->internal_return()->input_streams());
 
+	ChanCount n = _send_to->internal_return()->input_streams ();
+
+	if (n != _configured_output) {
+		_configured_output = n;
+		reset_panner ();
+	}
+
         set_name (sendto->name());
         _send_to_id = _send_to->id();
 
@@ -260,6 +267,22 @@ InternalSend::can_support_io_configuration (const ChanCount& in, ChanCount& out)
 	return true;
 }
 
+uint32_t
+InternalSend::pan_outs () const
+{
+	/* the number of targets for our panner is determined by what we are
+	   sending to, if anything.
+	*/
+
+	if (_send_to) {
+		return _send_to->internal_return()->input_streams().n_audio();
+	}
+
+	return 1; /* zero is more accurate, but 1 is probably safer as a way to
+		   * say "don't pan"
+		   */
+}
+
 bool
 InternalSend::configure_io (ChanCount in, ChanCount out)
 {