From: Andre Noll <maan@systemlinux.org>
Date: Tue, 7 May 2013 09:15:07 +0000 (+0200)
Subject: alsa: Set period time.
X-Git-Tag: v0.5.3~22^2~4
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=393c52c9e726570a2ee287e9f7e103b619a28f73;ds=sidebyside

alsa: Set period time.

This is probably not necessary, but since aplay from the alsa-utils
package sets it in the same way, it can't hurt to do this.
---

diff --git a/alsa_write.c b/alsa_write.c
index 11e4504d..e75fa230 100644
--- a/alsa_write.c
+++ b/alsa_write.c
@@ -80,6 +80,7 @@ static int alsa_init(struct private_alsa_write_data *pad,
 	unsigned buffer_time;
 	int ret;
 	const char *msg;
+	unsigned period_time;
 
 	PARA_INFO_LOG("opening %s\n", conf->device_arg);
 	msg = "unable to open pcm";
@@ -124,6 +125,13 @@ static int alsa_init(struct private_alsa_write_data *pad,
 		&buffer_time, NULL);
 	if (ret < 0)
 		goto fail;
+	period_time = buffer_time / 4;
+	msg = "could not set period time";
+	ret = snd_pcm_hw_params_set_period_time_near(pad->handle, hwparams,
+		&period_time, 0);
+	if (ret < 0)
+		goto fail;
+
 	msg = "unable to install hw params";
 	ret = snd_pcm_hw_params(pad->handle, hwparams);
 	if (ret < 0)