From 581b6b63b28cda24505f14364096175fef58a08d Mon Sep 17 00:00:00 2001
From: Kyle Keen <keenerd@gmail.com>
Date: Tue, 2 Sep 2014 05:39:31 -0400
Subject: [PATCH] rtl_fm: pad out single channel underruns

---
 src/rtl_fm.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/rtl_fm.c b/src/rtl_fm.c
index 960fff5..1ef5c71 100644
--- a/src/rtl_fm.c
+++ b/src/rtl_fm.c
@@ -927,7 +927,8 @@ static void *demod_thread_fn(void *arg)
 		if (d->exit_flag) {
 			do_exit = 1;
 		}
-		if (d->squelch_level && d->squelch_hits > d->conseq_squelch) {
+		if (controller.freq_len > 1 && d->squelch_level && \
+		    d->squelch_hits > d->conseq_squelch) {
 			unmark_shared_buffer(d->lowpassed);
 			d->squelch_hits = d->conseq_squelch + 1;  /* hair trigger */
 			safe_cond_signal(&controller.hop, &controller.hop_m);