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structure: Add bindings for foreach(), map_in_place() and filter_map_in_place()`

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Sebastian Dröge 2022-01-08 21:39:31 +02:00 committed by Sebastian Dröge
parent 6d63180bfc
commit 1b46bca2db
1 changed files with 91 additions and 0 deletions
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91
gstreamer/src/structure.rs
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@ -685,6 +685,97 @@ impl StructureRef {
pub fn serialize(&self, flags: crate::SerializeFlags) -> glib::GString {
unsafe { from_glib_full(ffi::gst_structure_serialize(&self.0, flags.into_glib())) }
}
#[doc(alias = "gst_structure_foreach")]
pub fn foreach<F: FnMut(glib::Quark, &glib::Value) -> std::ops::ControlFlow<()>>(
&self,
mut func: F,
) -> bool {
unsafe {
unsafe extern "C" fn trampoline<
F: FnMut(glib::Quark, &glib::Value) -> std::ops::ControlFlow<()>,
>(
quark: glib::ffi::GQuark,
value: *const glib::gobject_ffi::GValue,
user_data: glib::ffi::gpointer,
) -> glib::ffi::gboolean {
let func = &mut *(user_data as *mut F);
let res = func(from_glib(quark), &*(value as *const glib::Value));
matches!(res, std::ops::ControlFlow::Continue(_)).into_glib()
}
let func = &mut func as *mut F;
from_glib(ffi::gst_structure_foreach(
self.as_ptr(),
Some(trampoline::<F>),
func as glib::ffi::gpointer,
))
}
}
#[doc(alias = "gst_structure_map_in_place")]
pub fn map_in_place<F: FnMut(glib::Quark, &mut glib::Value) -> std::ops::ControlFlow<()>>(
&mut self,
mut func: F,
) -> bool {
unsafe {
unsafe extern "C" fn trampoline<
F: FnMut(glib::Quark, &mut glib::Value) -> std::ops::ControlFlow<()>,
>(
quark: glib::ffi::GQuark,
value: *mut glib::gobject_ffi::GValue,
user_data: glib::ffi::gpointer,
) -> glib::ffi::gboolean {
let func = &mut *(user_data as *mut F);
let res = func(from_glib(quark), &mut *(value as *mut glib::Value));
matches!(res, std::ops::ControlFlow::Continue(_)).into_glib()
}
let func = &mut func as *mut F;
from_glib(ffi::gst_structure_map_in_place(
self.as_mut_ptr(),
Some(trampoline::<F>),
func as glib::ffi::gpointer,
))
}
}
#[doc(alias = "gst_structure_filter_and_map_in_place")]
pub fn filter_map_in_place<F: FnMut(glib::Quark, glib::Value) -> Option<glib::Value>>(
&mut self,
mut func: F,
) {
unsafe {
unsafe extern "C" fn trampoline<
F: FnMut(glib::Quark, glib::Value) -> Option<glib::Value>,
>(
quark: glib::ffi::GQuark,
value: *mut glib::gobject_ffi::GValue,
user_data: glib::ffi::gpointer,
) -> glib::ffi::gboolean {
let func = &mut *(user_data as *mut F);
let v = mem::replace(
&mut *(value as *mut glib::Value),
glib::Value::uninitialized(),
);
match func(from_glib(quark), v) {
None => glib::ffi::GFALSE,
Some(v) => {
*value = v.into_raw();
glib::ffi::GTRUE
}
}
}
let func = &mut func as *mut F;
ffi::gst_structure_filter_and_map_in_place(
self.as_mut_ptr(),
Some(trampoline::<F>),
func as glib::ffi::gpointer,
);
}
}
}
impl fmt::Display for StructureRef {