gstreamer-rs/gstreamer/src/element.rs

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// Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.com>
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
use Element;
use glib;
use glib::IsA;
use glib::translate::{from_glib, ToGlibPtr};
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use QueryRef;
use Event;
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use miniobject::MiniObject;
use ffi;
impl Element {
pub fn link_many<E: IsA<Element>>(elements: &[&E]) -> Result<(), glib::BoolError> {
for (e1, e2) in elements.iter().zip(elements.iter().skip(1)) {
unsafe {
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let ret: bool = from_glib(ffi::gst_element_link(
e1.to_glib_none().0,
e2.to_glib_none().0,
));
if !ret {
return Err(glib::BoolError("Failed to link elements"));
}
}
}
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Ok(())
}
pub fn unlink_many<E: IsA<Element>>(elements: &[&E]) {
for (e1, e2) in elements.iter().zip(elements.iter().skip(1)) {
unsafe {
ffi::gst_element_unlink(e1.to_glib_none().0, e2.to_glib_none().0);
}
}
}
}
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pub trait ElementExtManual {
fn query(&self, query: &mut QueryRef) -> bool;
fn send_event(&self, event: Event) -> bool;
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}
impl<O: IsA<Element>> ElementExtManual for O {
fn query(&self, query: &mut QueryRef) -> bool {
unsafe {
from_glib(ffi::gst_element_query(
self.to_glib_none().0,
query.as_mut_ptr(),
))
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}
}
fn send_event(&self, event: Event) -> bool {
unsafe {
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from_glib(ffi::gst_element_send_event(
self.to_glib_none().0,
event.into_ptr(),
))
}
}
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}