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https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
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Add Element::call_async() bindings
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parent
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commit
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1 changed files with 60 additions and 2 deletions
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@ -10,8 +10,9 @@ use Element;
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use glib;
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use glib::IsA;
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use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlib, FromGlibPtrContainer,
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ToGlib, ToGlibPtr};
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use glib::translate::{from_glib, from_glib_full, from_glib_none, FromGlib, FromGlibPtrBorrow,
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FromGlibPtrContainer, ToGlib, ToGlibPtr};
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use glib::object::Downcast;
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use QueryRef;
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use Event;
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use Pad;
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@ -28,6 +29,7 @@ use std::mem;
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use libc;
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use ffi;
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use glib_ffi;
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use gobject_ffi;
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impl Element {
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@ -174,6 +176,11 @@ pub trait ElementExtManual {
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seek_flags: ::SeekFlags,
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seek_pos: V,
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) -> Result<(), glib::error::BoolError>;
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#[cfg(any(feature = "v1_10", feature = "dox"))]
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fn call_async<F>(&self, func: F)
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where
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F: FnOnce(&Self) + Send + 'static;
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}
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impl<O: IsA<Element>> ElementExtManual for O {
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@ -562,6 +569,42 @@ impl<O: IsA<Element>> ElementExtManual for O {
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)
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}
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}
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#[cfg(any(feature = "v1_10", feature = "dox"))]
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fn call_async<F>(&self, func: F)
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where
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F: FnOnce(&Self) + Send + 'static,
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{
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let user_data: Box<Option<Box<F>>> = Box::new(Some(Box::new(func)));
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unsafe extern "C" fn trampoline<O: IsA<Element>, F: FnOnce(&O) + Send + 'static>(
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element: *mut ffi::GstElement,
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user_data: glib_ffi::gpointer,
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) {
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callback_guard!();
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let user_data: &mut Option<Box<F>> = &mut *(user_data as *mut _);
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let callback = user_data.take().unwrap();
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callback(&Element::from_glib_borrow(element).downcast_unchecked());
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}
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unsafe extern "C" fn free_user_data<O: IsA<Element>, F: FnOnce(&O) + Send + 'static>(
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user_data: glib_ffi::gpointer,
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) {
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let _: Box<Option<Box<F>>> = Box::from_raw(user_data as *mut _);
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}
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let trampoline = trampoline::<Self, F>;
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let free_user_data = free_user_data::<Self, F>;
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unsafe {
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ffi::gst_element_call_async(
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self.to_glib_none().0,
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Some(trampoline),
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Box::into_raw(user_data) as *mut _,
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Some(free_user_data),
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);
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}
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}
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}
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lazy_static!{
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@ -1042,6 +1085,7 @@ macro_rules! gst_element_info(
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mod tests {
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use super::*;
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use prelude::*;
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use std::sync::mpsc::channel;
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#[test]
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fn test_get_pads() {
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@ -1073,4 +1117,18 @@ mod tests {
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pad_names.sort();
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assert_eq!(pad_names, vec![String::from("src")]);
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}
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#[test]
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fn test_call_async() {
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::init().unwrap();
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let identity = ::ElementFactory::make("identity", None).unwrap();
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let (sender, receiver) = channel();
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identity.call_async(move |_| {
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sender.send(()).unwrap();
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});
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assert_eq!(receiver.recv(), Ok(()));
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}
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}
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