From 22796cee0c7ae3bbaf2ef1cb2f2e49fd9f5f7acc Mon Sep 17 00:00:00 2001
From: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Date: Mon, 12 Feb 2024 14:00:54 +0100
Subject: [PATCH] meta: Add is_registered function for CustomMeta

Test if a Meta type is already registered.
It is useful to know if a custom metadata type has already
been registed to avoid registererd twice and get asserts.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1391>
---
 gstreamer/src/meta.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gstreamer/src/meta.rs b/gstreamer/src/meta.rs
index b469ad2f1..bc94c0a01 100644
--- a/gstreamer/src/meta.rs
+++ b/gstreamer/src/meta.rs
@@ -951,6 +951,11 @@ impl CustomMeta {
         }
     }
 
+    pub fn is_registered(name: &str) -> bool {
+        assert_initialized_main_thread!();
+        unsafe { name.run_with_gstr(|name| !ffi::gst_meta_get_info(name.as_ptr()).is_null()) }
+    }
+
     #[doc(alias = "gst_buffer_add_custom_meta")]
     pub fn add<'a>(
         buffer: &'a mut BufferRef,