From 8915ce1525e716707afbb335f364d47ae11a6339 Mon Sep 17 00:00:00 2001
From: Nick Moriarty <njmoriarty@gmail.com>
Date: Thu, 16 Apr 2015 22:29:27 +0100
Subject: [PATCH] Fix ALSA latency (causing ALSA not to block).

With arbitrarily large latency setting (unsigned int)-1, ALSA will happily
accept all the samples we want to throw at it.

Reducing to a reasonably long (but still sub-second) value of 100ms, we
cause ALSA writes to block and work properly with --tx-carrier.
---
 src/simpleaudio-alsa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/simpleaudio-alsa.c b/src/simpleaudio-alsa.c
index 1170ed8..0c1e0bf 100644
--- a/src/simpleaudio-alsa.c
+++ b/src/simpleaudio-alsa.c
@@ -155,7 +155,7 @@ sa_alsa_open_stream(
 		channels,
 		rate,
 		1 /* soft_resample (allow) */,
-		(unsigned int)-1 /* latency (allow max to avoid underruns) */);
+		100000 /* latency (us) */);
     if (error) {
 	fprintf(stderr, "E: %s\n", snd_strerror(error));
 	snd_pcm_close(pcm);