hip: Add hipcompositor element

Feature-wise it's the same as cudacompositor

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/8923>

subprojects/gst-plugins-bad/sys/hip/gsthipcompositor.h

@@ -0,0 +1,37 @@
+/* GStreamer
+ * Copyright (C) 2025 Seungha Yang <seungha@centricular.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+#include <gst/gst.h>
+#include <gst/video/video.h>
+#include <gst/video/gstvideoaggregator.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_HIP_COMPOSITOR_PAD (gst_hip_compositor_pad_get_type())
+G_DECLARE_FINAL_TYPE (GstHipCompositorPad, gst_hip_compositor_pad,
+    GST, HIP_COMPOSITOR_PAD, GstVideoAggregatorPad)
+
+#define GST_TYPE_HIP_COMPOSITOR (gst_hip_compositor_get_type())
+G_DECLARE_FINAL_TYPE (GstHipCompositor, gst_hip_compositor,
+    GST, HIP_COMPOSITOR, GstVideoAggregator)
+
+G_END_DECLS
+

subprojects/gst-plugins-bad/sys/hip/meson.build

@@ -11,6 +11,7 @@ hip_sources = [
   'gsthiprtc.cpp',
   'gsthiputils.cpp',
   'gsthip-interop.cpp',
+  'gsthipcompositor.cpp',
   'plugin.cpp',
 ]
 

subprojects/gst-plugins-bad/sys/hip/plugin.cpp

@@ -25,6 +25,7 @@
 #include "gsthipdevice.h"
 #include "gsthipmemorycopy.h"
 #include "gsthipconvertscale.h"
+#include "gsthipcompositor.h"
 #include "gsthiprtc.h"
 
 static gboolean
@@ -59,6 +60,8 @@ plugin_init (GstPlugin * plugin)
         "hipconvert", GST_RANK_NONE, GST_TYPE_HIP_CONVERT);
     gst_element_register (plugin,
         "hipscale", GST_RANK_NONE, GST_TYPE_HIP_SCALE);
+    gst_element_register (plugin,
+        "hipcompositor", GST_RANK_NONE, GST_TYPE_HIP_COMPOSITOR);
   }
 
   gst_clear_object (&device);