va: Implement the vah265enc plugin for va HEVC encoding.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2036>

subprojects/gst-plugins-bad/sys/va/gstvah265enc.h

@@ -0,0 +1,34 @@
+/* GStreamer
+ *  Copyright (C) 2022 Intel Corporation
+ *     Author: He Junyan <junyan.he@intel.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 "gstvadevice.h"
+
+G_BEGIN_DECLS
+
+gboolean     gst_va_h265_enc_register                (GstPlugin * plugin,
+                                                      GstVaDevice * device,
+                                                      GstCaps * sink_caps,
+                                                      GstCaps * src_caps,
+                                                      guint rank,
+                                                      VAEntrypoint entrypoint);
+
+G_END_DECLS

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

@@ -15,6 +15,7 @@ va_sources = [
   'gstvah264dec.c',
   'gstvah264enc.c',
   'gstvah265dec.c',
+  'gstvah265enc.c',
   'gstvajpegdec.c',
   'gstvampeg2dec.c',
   'gstvaprofile.c',