From 597837022a1962261a75234a5000bb237a014852 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Mon, 6 Apr 2020 23:45:20 +0200
Subject: [PATCH] Add method to check for ambiguous port latency

---
 libs/ardour/ardour/port_manager.h |  2 ++
 libs/ardour/port_manager.cc       | 24 ++++++++++++++++++++++++
 2 files changed, 26 insertions(+)

diff --git a/libs/ardour/ardour/port_manager.h b/libs/ardour/ardour/port_manager.h
index a991d4fafd..25497a442f 100644
--- a/libs/ardour/ardour/port_manager.h
+++ b/libs/ardour/ardour/port_manager.h
@@ -109,6 +109,8 @@ class LIBARDOUR_API PortManager
 	virtual void add_pending_port_deletion (Port*) = 0;
 	PBD::RingBuffer<Port*>& port_deletions_pending () { return _port_deletions_pending; }
 
+	bool check_for_amibiguous_latency (bool log = false) const;
+
 	/* per-Port monitoring */
 
 	bool can_request_input_monitoring () const;
diff --git a/libs/ardour/port_manager.cc b/libs/ardour/port_manager.cc
index c82bf09619..00648dda8b 100644
--- a/libs/ardour/port_manager.cc
+++ b/libs/ardour/port_manager.cc
@@ -1374,3 +1374,27 @@ PortManager::set_port_buffer_sizes (pframes_t n)
 		p->second->set_buffer_size (n);
 	}
 }
+
+bool
+PortManager::check_for_amibiguous_latency (bool log) const
+{
+	bool rv = false;
+	boost::shared_ptr<Ports> plist = ports.reader();
+	for (Ports::iterator p = plist->begin(); p != plist->end(); ++p) {
+		for (int c = 0; c < 1; ++c) {
+			LatencyRange range;
+			p->second->get_connected_latency_range (range, c ? true : false);
+			if (range.min != range.max) {
+				if (log) {
+					warning << string_compose(_("PortEngine: ambiguous %1 latency for port '%2' (%3, %4)"),
+							(c ? "playback" : "capture"), p->second->name(), range.min, range.max)
+					        << endmsg;
+					rv = true;
+				} else {
+				return true;
+				}
+			}
+		}
+	}
+	return rv;
+}