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use crate::ClockTime;
use crate::Object;
use glib::object::IsA;
use glib::translate::*;
use std::mem;
glib::wrapper! {
#[doc(alias = "GstControlSource")]
pub struct ControlSource(Object<ffi::GstControlSource, ffi::GstControlSourceClass>) @extends Object;
match fn {
type_ => || ffi::gst_control_source_get_type(),
}
}
impl ControlSource {
pub const NONE: Option<&'static ControlSource> = None;
}
unsafe impl Send for ControlSource {}
unsafe impl Sync for ControlSource {}
pub trait ControlSourceExt: 'static {
#[doc(alias = "gst_control_source_get_value")]
#[doc(alias = "control_source_get_value")]
fn value(&self, timestamp: ClockTime) -> Option<f64>;
}
impl<O: IsA<ControlSource>> ControlSourceExt for O {
fn value(&self, timestamp: ClockTime) -> Option<f64> {
unsafe {
let mut value = mem::MaybeUninit::uninit();
let ret = from_glib(ffi::gst_control_source_get_value(
self.as_ref().to_glib_none().0,
timestamp.into_glib(),
value.as_mut_ptr(),
));
let value = value.assume_init();
if ret {
Some(value)
} else {
None
}
}
}
}