gstreamer1.0-plugins-nvcompositor: fix spurious warning message

When running with gstreamer message level WARN, the following
message is repeated continuously:

videoaggregator gstvideoaggregator.c:528:gst_video_aggregator_convert_pad_prepare_frame:<comp> Could not map input buffer

This element doesn't need to have video data buffers mapped in
order to do its job. In fact the video data buffers used internally
don't contain video data at all, but instead the nvbuffer pointers,
which are obtained differently.

Signed-off-by: Kurt Kiefer <kurt.kiefer@arthrex.com>

recipes-multimedia/gstreamer/gstreamer1.0-plugins-nvcompositor/0002-Skip-map-frame-in-pad-prepare-to-fix-spurious-warnin.patch

@@ -0,0 +1,36 @@
+From 9ed04183d33d37ffe6eaa0e8f9a8696c0dcd3ddc Mon Sep 17 00:00:00 2001
+From: Kurt Kiefer <kekiefer@gmail.com>
+Date: Tue, 1 Nov 2022 10:47:26 -0700
+Subject: [PATCH] Skip map frame in pad prepare to fix spurious warnings
+
+When running with gstreamer message level WARN, the following
+message is repeated continuously:
+
+videoaggregator gstvideoaggregator.c:528:gst_video_aggregator_convert_pad_prepare_frame:<comp> Could not map input buffer
+
+This element doesn't need to have video data buffers mapped in
+order to do its job. In fact the video data buffers used internally
+don't contain video data at all, but instead the nvbuffer pointers,
+which are obtained differently.
+
+Signed-off-by: Kurt Kiefer <kekiefer@gmail.com>
+---
+ gstnvcompositor.c | 5 +----
+ 1 file changed, 1 insertion(+), 4 deletions(-)
+
+diff --git a/gstnvcompositor.c b/gstnvcompositor.c
+index 67965b5..26ea1c3 100644
+--- a/gstnvcompositor.c
++++ b/gstnvcompositor.c
+@@ -526,10 +526,7 @@ gst_nvcompositor_pad_prepare_frame (GstVideoAggregatorPad * pad,
+     GstVideoAggregator * vagg, GstBuffer * buffer,
+     GstVideoFrame * prepared_frame)
+ {
+-  return
+-      GST_VIDEO_AGGREGATOR_PAD_CLASS
+-      (gst_nvcompositor_pad_parent_class)->prepare_frame (pad, vagg, buffer,
+-      prepared_frame);
++  return TRUE;
+ }
+ 
+ /**

recipes-multimedia/gstreamer/gstreamer1.0-plugins-nvcompositor_1.20.5-r35.1.0.bb

@@ -10,7 +10,9 @@ require recipes-bsp/tegra-sources/tegra-sources-35.1.0.inc
 
 DEPENDS = "gstreamer1.0 gstreamer1.0-plugins-base virtual/egl tegra-mmapi tegra-libraries-multimedia-utils"
 
-SRC_URI += " file://0001-Update-makefile-for-OE-builds.patch"
+SRC_URI += " file://0001-Update-makefile-for-OE-builds.patch \
+             file://0002-Skip-map-frame-in-pad-prepare-to-fix-spurious-warnin.patch \
+"
 
 S = "${WORKDIR}/gst-nvcompositor"