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gstreamer: meta: Add upcast_ref() function to go from a specific to a generic meta

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1337>
This commit is contained in:
Sebastian Dröge 2023-10-26 13:39:44 +03:00
parent db2b39d382
commit 6f52f3e4fa
1 changed files with 15 additions and 0 deletions
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15
gstreamer/src/meta.rs
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@ -220,6 +220,11 @@ impl<'a, T> MetaRef<'a, T> {
}
}
#[inline]
pub fn upcast_ref(&self) -> &MetaRef<'a, Meta> {
unsafe { &*(self as *const MetaRef<'a, T> as *const MetaRef<'a, Meta>) }
}
#[inline]
pub fn as_ptr(&self) -> *const T::GstType
where
@ -296,6 +301,16 @@ impl<'a, T, U> MetaRefMut<'a, T, U> {
}
}
#[inline]
pub fn upcast_ref(&self) -> &MetaRef<'a, Meta> {
unsafe { &*(self as *const MetaRefMut<'a, T, U> as *const MetaRef<'a, Meta>) }
}
#[inline]
pub fn upcast_mut(&mut self) -> &MetaRefMut<'a, Meta, U> {
unsafe { &mut *(self as *mut MetaRefMut<'a, T, U> as *mut MetaRefMut<'a, Meta, U>) }
}
#[inline]
pub fn as_ptr(&self) -> *const T::GstType
where