From 472ce90fab962132d4503b9260c02ad9c7635897 Mon Sep 17 00:00:00 2001
From: Robin Gareus <robin@gareus.org>
Date: Sun, 20 Sep 2020 17:07:24 +0200
Subject: [PATCH] JACK backend allows to calibrate latency

However, if jackd is running, we should test if jackd is using
a full-duplex device to establish if latency calibration is
possible -- fix 92f54b3e98.
---
 libs/backends/jack/jack_audiobackend.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libs/backends/jack/jack_audiobackend.h b/libs/backends/jack/jack_audiobackend.h
index 6427af5d29..bf788444e2 100644
--- a/libs/backends/jack/jack_audiobackend.h
+++ b/libs/backends/jack/jack_audiobackend.h
@@ -191,7 +191,7 @@ class JACKAudioBackend : public AudioBackend {
 	return true;
     }
     bool can_measure_systemic_latency () const {
-	return false;
+	return true;
     }
 
     int      midi_event_get (pframes_t& timestamp, size_t& size, uint8_t const** buf, void* port_buffer, uint32_t event_index);