From: Georg Lippitsch <glippitsch@toolsonair.com>
Date: Mon, 26 Feb 2018 13:25:40 +0000 (+0100)
Subject: alsasrc: Don't use driver timestamp if it's zero
X-Git-Tag: 1.19.3~511^2~1081
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ed33011502cc617f0cd3b33f796c58faab39e93e;p=platform%2Fupstream%2Fgstreamer.git

alsasrc: Don't use driver timestamp if it's zero

Some alsa interfaces don't provide timestamps and thus always set the timestamp to zero.

Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/issues/453
---

diff --git a/ext/alsa/gstalsasrc.c b/ext/alsa/gstalsasrc.c
index 5fdf2dd..c6a7b57 100644
--- a/ext/alsa/gstalsasrc.c
+++ b/ext/alsa/gstalsasrc.c
@@ -947,6 +947,10 @@ gst_alsasrc_get_timestamp (GstAlsaSrc * asrc)
 
   /* get high resolution time stamp from driver */
   snd_pcm_status_get_htstamp (status, &tstamp);
+
+  if (tstamp.tv_sec == 0 && tstamp.tv_nsec == 0)
+    return GST_CLOCK_TIME_NONE;
+
   timestamp = GST_TIMESPEC_TO_TIME (tstamp);
 
   /* max available frames sets the depth of the buffer */