videoparsers: av1: Add the AV1 parse.

This AV1 parse implements the conversion between alignment of obu,
tu and frame, and the conversion between stream-format of obu-stream
and annexb.

TODO:
1. May need a property of operating_point to filter the OBUs
2. May add a property to disable deep parse.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1614>

gst/videoparsers/gstav1parse.h

@@ -0,0 +1,34 @@
+/* GStreamer
+ * Copyright (C) 2020 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.
+ */
+
+#ifndef __GST_AV1_PARSE_H__
+#define __GST_AV1_PARSE_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstbaseparse.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_AV1_PARSE (gst_av1_parse_get_type())
+G_DECLARE_FINAL_TYPE (GstAV1Parse,
+    gst_av1_parse, GST, AV1_PARSE, GstBaseParse);
+
+G_END_DECLS
+
+#endif /* __GST_AV1_PARSE_H__ */

gst/videoparsers/meson.build

@@ -13,6 +13,7 @@ vparse_sources = [
   'gstvideoparseutils.c',
   'gstjpeg2000parse.c',
   'gstvp9parse.c',
+  'gstav1parse.c',
 ]
 
 gstvideoparsersbad = library('gstvideoparsersbad',

gst/videoparsers/plugin.c

@@ -32,6 +32,7 @@
 #include "gstvc1parse.h"
 #include "gsth265parse.h"
 #include "gstvp9parse.h"
+#include "gstav1parse.h"
 
 GST_DEBUG_CATEGORY (videoparseutils_debug);
 
@@ -70,6 +71,14 @@ plugin_init (GstPlugin * plugin)
   ret |= gst_element_register (plugin, "vp9parse",
       GST_RANK_SECONDARY, GST_TYPE_VP9_PARSE);
 
+  /**
+   * element-av1parse:
+   *
+   * Since: 1.20
+   */
+  ret |= gst_element_register (plugin, "av1parse",
+      GST_RANK_SECONDARY, GST_TYPE_AV1_PARSE);
+
   return ret;
 }