rtsp-server: Add RTSPContext uri getter

Add uri getter from RTSPContext

Fix #469

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1274>

examples/src/bin/rtsp-server-subclass.rs

@@ -303,6 +303,12 @@ mod client {
                 self.parent_closed();
                 println!("Client {client:?} closed");
             }
+
+            fn describe_request(&self, ctx: &gst_rtsp_server::RTSPContext) {
+                self.parent_describe_request(ctx);
+                let request_uri = ctx.uri().unwrap().request_uri();
+                println!("Describe request for uri: {request_uri:?}");
+            }
         }
     }
 

gstreamer-rtsp-server/src/rtsp_context.rs

@@ -1,11 +1,16 @@
 // Take a look at the license at the top of the repository in the LICENSE file.
 
-use std::{marker::PhantomData, ptr};
+use std::{
+    marker::PhantomData,
+    ptr::{self, addr_of},
+};
 
 use glib::translate::*;
+use gst_rtsp::RTSPUrl;
 
 #[derive(Debug, PartialEq, Eq)]
 #[doc(alias = "GstRTSPContext")]
+#[repr(transparent)]
 pub struct RTSPContext(ptr::NonNull<ffi::GstRTSPContext>);
 
 impl RTSPContext {
@@ -22,7 +27,22 @@ impl RTSPContext {
         }
     }
 
-    // TODO: Add various getters for all the contained fields as needed
+    #[inline]
+    pub fn uri(&self) -> Option<&RTSPUrl> {
+        unsafe {
+            let ptr = self.0.as_ptr();
+            if (*ptr).uri.is_null() {
+                None
+            } else {
+                let uri = RTSPUrl::from_glib_ptr_borrow(
+                    addr_of!((*ptr).uri) as *const *const gst_rtsp::ffi::GstRTSPUrl
+                );
+                Some(uri)
+            }
+        }
+    }
+
+    // TODO: Add additional getters for all the contained fields as needed
 }
 
 #[doc(hidden)]