gstreamer: Add PartialEq impls between owned/borrowed miniobjects/structures

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1158>

gstreamer-audio/src/functions.rs

@@ -82,7 +82,7 @@ mod tests {
 
         #[cfg(feature = "v1_18")]
         {
-            use glib::translate::{from_glib_full, IntoGlib};
+            use glib::translate::IntoGlib;
 
             /* audio_make_raw_caps() is a re-implementation so ensure it returns the same caps as the C API */
             let c_caps = unsafe {
@@ -96,7 +96,7 @@ mod tests {
                     formats.len() as u32,
                     ffi::GST_AUDIO_LAYOUT_INTERLEAVED,
                 );
-                from_glib_full(caps)
+                gst::Caps::from_glib_full(caps)
             };
             assert_eq!(caps, c_caps);
         }

gstreamer-video/src/functions.rs

@@ -307,7 +307,7 @@ mod tests {
                         .map(|f| f.into_glib())
                         .collect();
                 let caps = ffi::gst_video_make_raw_caps(formats.as_ptr(), formats.len() as u32);
-                from_glib_full(caps)
+                gst::Caps::from_glib_full(caps)
             };
             assert_eq!(caps, c_caps);
         }

gstreamer/src/buffer.rs

@@ -1035,6 +1035,17 @@ impl PartialEq for Buffer {
 
 impl Eq for Buffer {}
 
+impl PartialEq<BufferRef> for Buffer {
+    fn eq(&self, other: &BufferRef) -> bool {
+        BufferRef::eq(self, other)
+    }
+}
+impl PartialEq<Buffer> for BufferRef {
+    fn eq(&self, other: &Buffer) -> bool {
+        BufferRef::eq(other, self)
+    }
+}
+
 impl fmt::Debug for BufferRef {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         use crate::utils::Displayable;

gstreamer/src/caps.rs

@@ -827,6 +827,18 @@ impl PartialEq for Caps {
 
 impl Eq for Caps {}
 
+impl PartialEq<CapsRef> for Caps {
+    fn eq(&self, other: &CapsRef) -> bool {
+        CapsRef::eq(self, other)
+    }
+}
+
+impl PartialEq<Caps> for CapsRef {
+    fn eq(&self, other: &Caps) -> bool {
+        CapsRef::eq(other, self)
+    }
+}
+
 impl fmt::Debug for CapsRef {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         if self.is_any() {

gstreamer/src/structure.rs

@@ -153,18 +153,24 @@ impl fmt::Display for Structure {
 
 impl PartialEq for Structure {
     fn eq(&self, other: &Structure) -> bool {
-        self.as_ref().eq(other)
-    }
-}
-
-impl PartialEq<StructureRef> for Structure {
-    fn eq(&self, other: &StructureRef) -> bool {
-        self.as_ref().eq(other)
+        StructureRef::eq(self, other)
     }
 }
 
 impl Eq for Structure {}
 
+impl PartialEq<StructureRef> for Structure {
+    fn eq(&self, other: &StructureRef) -> bool {
+        StructureRef::eq(self, other)
+    }
+}
+
+impl PartialEq<Structure> for StructureRef {
+    fn eq(&self, other: &Structure) -> bool {
+        StructureRef::eq(other, self)
+    }
+}
+
 impl str::FromStr for Structure {
     type Err = glib::BoolError;
 

gstreamer/src/tags.rs

@@ -584,6 +584,18 @@ impl PartialEq for TagList {
 
 impl Eq for TagList {}
 
+impl PartialEq<TagListRef> for TagList {
+    fn eq(&self, other: &TagListRef) -> bool {
+        TagListRef::eq(self, other)
+    }
+}
+
+impl PartialEq<TagList> for TagListRef {
+    fn eq(&self, other: &TagList) -> bool {
+        TagListRef::eq(other, self)
+    }
+}
+
 impl fmt::Debug for TagListRef {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         let mut debug = f.debug_struct("TagList");