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
10pub trait BaseSrcExtManual: IsA<BaseSrc> + 'static {
11    #[doc(alias = "get_allocator")]
12    #[doc(alias = "gst_base_src_get_allocator")]
13    fn allocator(&self) -> (Option<gst::Allocator>, gst::AllocationParams) {
14        unsafe {
15            let mut allocator = ptr::null_mut();
16            let mut params = mem::MaybeUninit::uninit();
17            ffi::gst_base_src_get_allocator(
18                self.as_ref().to_glib_none().0,
19                &mut allocator,
20                params.as_mut_ptr(),
21            );
22            (from_glib_full(allocator), params.assume_init().into())
23        }
24    }
25
26    #[doc(alias = "get_segment")]
27    fn segment(&self) -> gst::Segment {
28        unsafe {
29            let src: &ffi::GstBaseSrc = &*(self.as_ptr() as *const _);
30            let srcpad = self.src_pad();
31            let _guard = srcpad.stream_lock();
32            let _guard = self.as_ref().object_lock();
33            from_glib_none(&src.segment as *const _)
34        }
35    }
36
37    #[doc(alias = "gst_base_src_query_latency")]
38    fn query_latency(
39        &self,
40    ) -> Result<(bool, Option<gst::ClockTime>, Option<gst::ClockTime>), glib::BoolError> {
41        unsafe {
42            let mut live = mem::MaybeUninit::uninit();
43            let mut min_latency = mem::MaybeUninit::uninit();
44            let mut max_latency = mem::MaybeUninit::uninit();
45            let ret = from_glib(ffi::gst_base_src_query_latency(
46                self.as_ref().to_glib_none().0,
47                live.as_mut_ptr(),
48                min_latency.as_mut_ptr(),
49                max_latency.as_mut_ptr(),
50            ));
51            let live = live.assume_init();
52            let min_latency = min_latency.assume_init();
53            let max_latency = max_latency.assume_init();
54            if ret {
55                Ok((
56                    from_glib(live),
57                    from_glib(min_latency),
58                    from_glib(max_latency),
59                ))
60            } else {
61                Err(glib::bool_error!("Failed to query latency"))
62            }
63        }
64    }
65
66    fn src_pad(&self) -> &gst::Pad {
67        unsafe {
68            let elt = &*(self.as_ptr() as *const ffi::GstBaseSrc);
69            &*(&elt.srcpad as *const *mut gst::ffi::GstPad as *const gst::Pad)
70        }
71    }
72}
73
74impl<O: IsA<BaseSrc>> BaseSrcExtManual for O {}
gstreamer_base/base_src.rs

gstreamer_base/
base_src.rs
