From 92b43c3e0a59351637f57682384a9a05a2d8ced6 Mon Sep 17 00:00:00 2001
From: "Joshua M. Doe" <oss@nvl.army.mil>
Date: Wed, 26 May 2021 10:38:38 -0400
Subject: [PATCH] gentlsrc: if GEV timestamp latch fails use previous value

This has been encountered with multiple instances using the same producer
---
 sys/gentl/gstgentlsrc.c | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/sys/gentl/gstgentlsrc.c b/sys/gentl/gstgentlsrc.c
index 8b1a189..3f5ce4c 100644
--- a/sys/gentl/gstgentlsrc.c
+++ b/sys/gentl/gstgentlsrc.c
@@ -886,8 +886,17 @@ error:
 static void
 gst_gentlsrc_src_latch_timestamps (GstGenTlSrc * src)
 {
-  src->unix_latched_time = get_unix_ns ();
-  src->gentl_latched_ticks = gst_gentlsrc_get_gev_timestamp_ticks (src);
+  guint64 unix_ts, gev_ts;
+
+  unix_ts = get_unix_ns ();
+  gev_ts = gst_gentlsrc_get_gev_timestamp_ticks (src);
+
+  if (gev_ts != 0) {
+    src->unix_latched_time = unix_ts;
+    src->gentl_latched_ticks = gev_ts;
+  } else {
+    GST_WARNING_OBJECT (src, "Failed to latch GEV time, using old latch value");
+  }
 }
 
 static gboolean