gstreamer: meta: Add MetaRef::copy() for copying a meta between buffers

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1338>
This commit is contained in:
Sebastian Dröge 2023-11-03 11:55:20 +02:00
parent eb6d3a6c6c
commit f471501df5

View file

@ -215,6 +215,47 @@ impl<'a, T> MetaRef<'a, T> {
unsafe { &*(self as *const MetaRef<'a, T> as *const MetaRef<'a, Meta>) } unsafe { &*(self as *const MetaRef<'a, T> as *const MetaRef<'a, Meta>) }
} }
pub fn copy(
&self,
buffer: &mut BufferRef,
region: bool,
offset: usize,
size: Option<usize>,
) -> Result<(), glib::BoolError>
where
T: MetaAPI,
{
use glib::once_cell::sync::Lazy;
static TRANSFORM_COPY: Lazy<glib::Quark> = Lazy::new(|| glib::Quark::from_str("gst-copy"));
unsafe {
let info = *(*self.upcast_ref().as_ptr()).info;
let Some(transform_func) = info.transform_func else {
return Err(glib::bool_error!(
"Can't copy meta without transform function"
));
};
let mut copy_data = ffi::GstMetaTransformCopy {
region: region.into_glib(),
offset,
size: size.unwrap_or(usize::MAX),
};
glib::result_from_gboolean!(
transform_func(
buffer.as_mut_ptr(),
mut_override(self.upcast_ref().as_ptr()),
mut_override(self.buffer.as_ptr()),
TRANSFORM_COPY.into_glib(),
&mut copy_data as *mut _ as *mut _,
),
"Failed to copy meta"
)
}
}
#[inline] #[inline]
pub fn as_ptr(&self) -> *const T::GstType pub fn as_ptr(&self) -> *const T::GstType
where where
@ -307,6 +348,19 @@ impl<'a, T, U> MetaRefMut<'a, T, U> {
} }
} }
pub fn copy(
&self,
buffer: &mut BufferRef,
region: bool,
offset: usize,
size: Option<usize>,
) -> Result<(), glib::BoolError>
where
T: MetaAPI,
{
self.as_meta_ref().copy(buffer, region, offset, size)
}
#[inline] #[inline]
pub fn as_ptr(&self) -> *const T::GstType pub fn as_ptr(&self) -> *const T::GstType
where where
@ -864,4 +918,32 @@ mod tests {
assert!(buffer.meta::<ParentBufferMeta>().is_none()); assert!(buffer.meta::<ParentBufferMeta>().is_none());
} }
#[test]
fn test_copy_reference_timestamp_meta() {
crate::init().unwrap();
let caps = crate::Caps::new_empty_simple("timestamp/x-ntp");
let mut buffer = crate::Buffer::new();
{
ReferenceTimestampMeta::add(
buffer.get_mut().unwrap(),
&caps,
crate::ClockTime::from_seconds(1),
crate::ClockTime::NONE,
);
}
let mut buffer_dest = crate::Buffer::new();
{
let meta = buffer.meta::<ReferenceTimestampMeta>().unwrap();
let buffer_dest = buffer_dest.get_mut().unwrap();
meta.copy(buffer_dest, false, 0, None).unwrap();
}
let meta = buffer_dest.meta::<ReferenceTimestampMeta>().unwrap();
assert_eq!(meta.reference(), &caps);
assert_eq!(meta.timestamp(), crate::ClockTime::from_seconds(1));
assert_eq!(meta.duration(), crate::ClockTime::NONE);
}
} }