[vala/staging] gstreamer: Update from 1.17.2+ git master

[Rico Tzschichholz <ricotz src gnome org>]

commit 50322730479a91fd90a329c62d185e81e258b667
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Aug 9 21:16:53 2020 +0200

    gstreamer: Update from 1.17.2+ git master

 vapi/gstreamer-base-1.0.vapi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vapi/gstreamer-base-1.0.vapi b/vapi/gstreamer-base-1.0.vapi
index 4c9bdc711..ba7bde292 100644
--- a/vapi/gstreamer-base-1.0.vapi
+++ b/vapi/gstreamer-base-1.0.vapi
@@ -88,7 +88,7 @@ namespace Gst {
                        [NoWrapper]
                        public virtual bool propose_allocation (Gst.Base.AggregatorPad pad, Gst.Query 
decide_query, Gst.Query query);
                        [Version (since = "1.18")]
-                       public void selected_samples ();
+                       public void selected_samples (Gst.ClockTime pts, Gst.ClockTime dts, Gst.ClockTime 
duration, Gst.Structure? info);
                        public void set_latency (Gst.ClockTime min_latency, Gst.ClockTime max_latency);
                        public void set_src_caps (Gst.Caps caps);
                        [Version (since = "1.16")]
@@ -128,7 +128,7 @@ namespace Gst {
                        [NoAccessorMethod]
                        public Gst.Base.AggregatorStartTimeSelection start_time_selection { get; set; }
                        [Version (since = "1.18")]
-                       public signal void samples_selected ();
+                       public signal void samples_selected (Gst.Segment object, uint64 p0, uint64 p1, uint64 
p2, Gst.Structure p3);
                }
                [CCode (cheader_filename = "gst/base/base.h", cname = "GstAggregatorPad", lower_case_cprefix 
= "gst_aggregator_pad_", type_id = "gst_aggregator_pad_get_type ()")]
                [GIR (name = "AggregatorPad")]