Commit c38af51b authored by Sebastian Dröge's avatar Sebastian Dröge 🍵

Add Element::call_async() bindings

parent 56555f6b
......@@ -10,8 +10,9 @@ use Element;
use glib;
use glib::IsA;
use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlib, FromGlibPtrContainer,
ToGlib, ToGlibPtr};
use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlib, FromGlibPtrBorrow,
FromGlibPtrContainer, ToGlib, ToGlibPtr};
use glib::object::Downcast;
use QueryRef;
use Event;
use Pad;
......@@ -28,6 +29,7 @@ use std::mem;
use libc;
use ffi;
use glib_ffi;
use gobject_ffi;
impl Element {
......@@ -174,6 +176,11 @@ pub trait ElementExtManual {
seek_flags: ::SeekFlags,
seek_pos: V,
) -> Result<(), glib::error::BoolError>;
#[cfg(any(feature = "v1_10", feature = "dox"))]
fn call_async<F>(&self, func: F)
where
F: FnOnce(&Self) + Send + 'static;
}
impl<O: IsA<Element>> ElementExtManual for O {
......@@ -562,6 +569,42 @@ impl<O: IsA<Element>> ElementExtManual for O {
)
}
}
#[cfg(any(feature = "v1_10", feature = "dox"))]
fn call_async<F>(&self, func: F)
where
F: FnOnce(&Self) + Send + 'static,
{
let user_data: Box<Option<Box<F>>> = Box::new(Some(Box::new(func)));
unsafe extern "C" fn trampoline<O: IsA<Element>, F: FnOnce(&O) + Send + 'static>(
element: *mut ffi::GstElement,
user_data: glib_ffi::gpointer,
) {
callback_guard!();
let user_data: &mut Option<Box<F>> = &mut *(user_data as *mut _);
let callback = user_data.take().unwrap();
callback(&Element::from_glib_borrow(element).downcast_unchecked());
}
unsafe extern "C" fn free_user_data<O: IsA<Element>, F: FnOnce(&O) + Send + 'static>(
user_data: glib_ffi::gpointer,
) {
let _: Box<Option<Box<F>>> = Box::from_raw(user_data as *mut _);
}
let trampoline = trampoline::<Self, F>;
let free_user_data = free_user_data::<Self, F>;
unsafe {
ffi::gst_element_call_async(
self.to_glib_none().0,
Some(trampoline),
Box::into_raw(user_data) as *mut _,
Some(free_user_data),
);
}
}
}
lazy_static!{
......@@ -1042,6 +1085,7 @@ macro_rules! gst_element_info(
mod tests {
use super::*;
use prelude::*;
use std::sync::mpsc::channel;
#[test]
fn test_get_pads() {
......@@ -1073,4 +1117,18 @@ mod tests {
pad_names.sort();
assert_eq!(pad_names, vec![String::from("src")]);
}
#[test]
fn test_call_async() {
::init().unwrap();
let identity = ::ElementFactory::make("identity", None).unwrap();
let (sender, receiver) = channel();
identity.call_async(move |_| {
sender.send(()).unwrap();
});
assert_eq!(receiver.recv(), Ok(()));
}
}
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