gstreamer-base 0.25.3

Rust bindings for GStreamer Base library
Documentation 
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// Take a look at the license at the top of the repository in the LICENSE file.

use std::{mem, ptr};

use glib::{prelude::*, translate::*};
use gst::prelude::*;

use crate::{BaseTransform, ffi};

pub trait BaseTransformExtManual: IsA<BaseTransform> + 'static {
    #[doc(alias = "get_allocator")]
    #[doc(alias = "gst_base_transform_get_allocator")]
    fn allocator(&self) -> (Option<gst::Allocator>, gst::AllocationParams) {
        unsafe {
            let mut allocator = ptr::null_mut();
            let mut params = mem::MaybeUninit::uninit();
            ffi::gst_base_transform_get_allocator(
                self.as_ref().to_glib_none().0,
                &mut allocator,
                params.as_mut_ptr(),
            );
            (from_glib_full(allocator), params.assume_init().into())
        }
    }

    #[cfg(feature = "v1_30")]
    #[cfg_attr(docsrs, doc(cfg(feature = "v1_30")))]
    #[doc(alias = "gst_base_transform_set_allocator")]
    fn set_allocator(
        &self,
        pool: Option<impl IsA<gst::BufferPool>>,
        allocator: Option<impl IsA<gst::Allocator>>,
        params: Option<&gst::AllocationParams>,
        query: Option<gst::query::Allocation<gst::Query>>,
    ) -> Result<(), gst::LoggableError> {
        unsafe {
            gst::result_from_gboolean!(
                ffi::gst_base_transform_set_allocator(
                    self.as_ref().to_glib_none().0,
                    pool.map(|p| p.upcast()).into_glib_ptr(),
                    allocator.map(|p| p.upcast()).into_glib_ptr(),
                    params.to_glib_none().0,
                    query.map(gst::Query::from).into_glib_ptr(),
                ),
                gst::CAT_RUST,
                "Failed to set allocator"
            )
        }
    }

    #[doc(alias = "get_segment")]
    fn segment(&self) -> gst::Segment {
        unsafe {
            let trans: &ffi::GstBaseTransform = &*(self.as_ptr() as *const _);
            let sinkpad = self.sink_pad();
            let _guard = sinkpad.stream_lock();
            from_glib_none(&trans.segment as *const _)
        }
    }

    fn sink_pad(&self) -> &gst::Pad {
        unsafe {
            let elt = &*(self.as_ptr() as *const ffi::GstBaseTransform);
            &*(&elt.sinkpad as *const *mut gst::ffi::GstPad as *const gst::Pad)
        }
    }

    fn src_pad(&self) -> &gst::Pad {
        unsafe {
            let elt = &*(self.as_ptr() as *const ffi::GstBaseTransform);
            &*(&elt.srcpad as *const *mut gst::ffi::GstPad as *const gst::Pad)
        }
    }
}

impl<O: IsA<BaseTransform>> BaseTransformExtManual for O {}