From d5409fca8a500d09eb147679fc9700da1eb4fcdc Mon Sep 17 00:00:00 2001
From: "Joshua M. Doe" <oss@nvl.army.mil>
Date: Thu, 14 Jun 2012 13:42:20 -0400
Subject: [PATCH] niimaq: send DateTime tag event

---
 sys/niimaq/gstniimaq.c | 18 ++++++++++++++++++
 sys/niimaq/gstniimaq.h |  3 +++
 2 files changed, 21 insertions(+)

diff --git a/sys/niimaq/gstniimaq.c b/sys/niimaq/gstniimaq.c
index 5a1a054..f423684 100644
--- a/sys/niimaq/gstniimaq.c
+++ b/sys/niimaq/gstniimaq.c
@@ -143,6 +143,9 @@ gst_niimaqsrc_frame_start_callback (SESSION_ID sid, IMG_ERR err,
   GstNiImaqSrcFrameTime *frametime = g_new (GstNiImaqSrcFrameTime, 1);
   uInt32 val;
 
+  if (G_UNLIKELY (niimaqsrc->start_time == NULL))
+    niimaqsrc->start_time = gst_date_time_new_now_utc ();
+
   /* get clock time and set to frametime struct */
   clock = gst_element_get_clock (GST_ELEMENT (niimaqsrc));
   if (G_LIKELY (clock)) {
@@ -520,6 +523,9 @@ gst_niimaqsrc_init (GstNiImaqSrc * niimaqsrc, GstNiImaqSrcClass * g_class)
 
   niimaqsrc->timelist = NULL;
   niimaqsrc->frametime_mutex = g_mutex_new ();
+
+  niimaqsrc->start_time = NULL;
+  niimaqsrc->start_time_sent = FALSE;
 }
 
 /**
@@ -546,6 +552,11 @@ gst_niimaqsrc_dispose (GObject * object)
   niimaqsrc->frametime_mutex = NULL;
 
   /* unref objects */
+  if (niimaqsrc->start_time) {
+    gst_date_time_unref (niimaqsrc->start_time);
+    niimaqsrc->start_time = NULL;
+  }
+
   if (niimaqsrc->caps) {
     gst_caps_unref (niimaqsrc->caps);
     niimaqsrc->caps = NULL;
@@ -837,6 +848,13 @@ gst_niimaqsrc_create (GstPushSrc * psrc, GstBuffer ** buffer)
      src->rate_denominator, src->rate_numerator);
      } */
 
+  if (G_UNLIKELY (niimaqsrc->start_time && !niimaqsrc->start_time_sent)) {
+    GstTagList *tl =
+        gst_tag_list_new_full (GST_TAG_DATE_TIME, niimaqsrc->start_time, NULL);
+    GstEvent *e = gst_event_new_tag (tl);
+    gst_pad_push_event (GST_PAD (GST_BASE_SRC_PAD (niimaqsrc)), e);
+  }
+
   return res;
 
 error:
diff --git a/sys/niimaq/gstniimaq.h b/sys/niimaq/gstniimaq.h
index 6ce75cd..3bdcb33 100644
--- a/sys/niimaq/gstniimaq.h
+++ b/sys/niimaq/gstniimaq.h
@@ -75,6 +75,9 @@ struct _GstNiImaqSrc {
 
   GSList *timelist;
   GMutex *frametime_mutex;
+
+  GstDateTime *start_time;
+  gboolean start_time_sent;
 };
 
 struct _GstNiImaqSrcClass {