gstreamer_base/
base_src.rs

1// Take a look at the license at the top of the repository in the LICENSE file.
2
3use std::{mem, ptr};
4
5use glib::{prelude::*, translate::*};
6use gst::prelude::*;
7
8use crate::{ffi, BaseSrc};
9
10mod sealed {
11    pub trait Sealed {}
12    impl<T: super::IsA<super::BaseSrc>> Sealed for T {}
13}
14
15pub trait BaseSrcExtManual: sealed::Sealed + IsA<BaseSrc> + 'static {
16    #[doc(alias = "get_allocator")]
17    #[doc(alias = "gst_base_src_get_allocator")]
18    fn allocator(&self) -> (Option<gst::Allocator>, gst::AllocationParams) {
19        unsafe {
20            let mut allocator = ptr::null_mut();
21            let mut params = mem::MaybeUninit::uninit();
22            ffi::gst_base_src_get_allocator(
23                self.as_ref().to_glib_none().0,
24                &mut allocator,
25                params.as_mut_ptr(),
26            );
27            (from_glib_full(allocator), params.assume_init().into())
28        }
29    }
30
31    #[doc(alias = "get_segment")]
32    fn segment(&self) -> gst::Segment {
33        unsafe {
34            let src: &ffi::GstBaseSrc = &*(self.as_ptr() as *const _);
35            let srcpad = self.src_pad();
36            let _guard = srcpad.stream_lock();
37            let _guard = self.as_ref().object_lock();
38            from_glib_none(&src.segment as *const _)
39        }
40    }
41
42    #[doc(alias = "gst_base_src_query_latency")]
43    fn query_latency(
44        &self,
45    ) -> Result<(bool, Option<gst::ClockTime>, Option<gst::ClockTime>), glib::BoolError> {
46        unsafe {
47            let mut live = mem::MaybeUninit::uninit();
48            let mut min_latency = mem::MaybeUninit::uninit();
49            let mut max_latency = mem::MaybeUninit::uninit();
50            let ret = from_glib(ffi::gst_base_src_query_latency(
51                self.as_ref().to_glib_none().0,
52                live.as_mut_ptr(),
53                min_latency.as_mut_ptr(),
54                max_latency.as_mut_ptr(),
55            ));
56            let live = live.assume_init();
57            let min_latency = min_latency.assume_init();
58            let max_latency = max_latency.assume_init();
59            if ret {
60                Ok((
61                    from_glib(live),
62                    from_glib(min_latency),
63                    from_glib(max_latency),
64                ))
65            } else {
66                Err(glib::bool_error!("Failed to query latency"))
67            }
68        }
69    }
70
71    fn src_pad(&self) -> &gst::Pad {
72        unsafe {
73            let elt = &*(self.as_ptr() as *const ffi::GstBaseSrc);
74            &*(&elt.srcpad as *const *mut gst::ffi::GstPad as *const gst::Pad)
75        }
76    }
77}
78
79impl<O: IsA<BaseSrc>> BaseSrcExtManual for O {}
gstreamer_base/base_src.rs

gstreamer_base/
base_src.rs
