gstreamer-rs/gstreamer-base/src/base_sink.rs
Sebastian Dröge a16c3888e5 Return base class pads by reference instead of strong reference
Avoids unnecessary reference counting and the caller can get a strong
reference easily by calling clone().
2022-05-05 14:18:03 +03:00

67 lines
2.3 KiB
Rust

// Take a look at the license at the top of the repository in the LICENSE file.
use crate::BaseSink;
use glib::prelude::*;
use glib::translate::*;
use std::mem;
pub trait BaseSinkExtManual: 'static {
#[doc(alias = "get_segment")]
fn segment(&self) -> gst::Segment;
#[doc(alias = "gst_base_sink_query_latency")]
fn query_latency(
&self,
) -> Result<(bool, bool, Option<gst::ClockTime>, Option<gst::ClockTime>), glib::BoolError>;
fn sink_pad(&self) -> &gst::Pad;
}
impl<O: IsA<BaseSink>> BaseSinkExtManual for O {
fn segment(&self) -> gst::Segment {
unsafe {
let sink: &ffi::GstBaseSink = &*(self.as_ptr() as *const _);
let _guard = crate::utils::MutexGuard::lock(&sink.element.object.lock);
from_glib_none(&sink.segment as *const _)
}
}
fn query_latency(
&self,
) -> Result<(bool, bool, Option<gst::ClockTime>, Option<gst::ClockTime>), glib::BoolError> {
unsafe {
let mut live = mem::MaybeUninit::uninit();
let mut upstream_live = mem::MaybeUninit::uninit();
let mut min_latency = mem::MaybeUninit::uninit();
let mut max_latency = mem::MaybeUninit::uninit();
let ret = from_glib(ffi::gst_base_sink_query_latency(
self.as_ref().to_glib_none().0,
live.as_mut_ptr(),
upstream_live.as_mut_ptr(),
min_latency.as_mut_ptr(),
max_latency.as_mut_ptr(),
));
let live = live.assume_init();
let upstream_live = upstream_live.assume_init();
let min_latency = min_latency.assume_init();
let max_latency = max_latency.assume_init();
if ret {
Ok((
from_glib(live),
from_glib(upstream_live),
from_glib(min_latency),
from_glib(max_latency),
))
} else {
Err(glib::bool_error!("Failed to query latency"))
}
}
}
fn sink_pad(&self) -> &gst::Pad {
unsafe {
let elt = &*(self.as_ptr() as *const ffi::GstBaseSink);
&*(&elt.sinkpad as *const *mut gst::ffi::GstPad as *const gst::Pad)
}
}
}