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gstreamer: audiofilter: Add parent_allowed_caps()

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer-rs/-/merge_requests/1356>
This commit is contained in:
Sebastian Dröge 2023-12-05 11:14:44 +02:00
parent ceed45cfd7
commit 84ca72a833
1 changed files with 25 additions and 2 deletions
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27
gstreamer-audio/src/subclass/audio_filter.rs
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@ -1,12 +1,14 @@
// Take a look at the license at the top of the repository in the LICENSE file.
use glib::translate::*;
use glib::{once_cell::sync::Lazy, translate::*};
use gst_base::{prelude::*, subclass::prelude::*};
use crate::{AudioFilter, AudioInfo};
pub trait AudioFilterImpl: AudioFilterImplExt + BaseTransformImpl {
fn allowed_caps() -> &'static gst::Caps;
fn allowed_caps() -> &'static gst::Caps {
Self::parent_allowed_caps()
}
fn setup(&self, info: &AudioInfo) -> Result<(), gst::LoggableError> {
self.parent_setup(info)
@ -38,6 +40,27 @@ pub trait AudioFilterImplExt: sealed::Sealed + ObjectSubclass {
.unwrap_or(Ok(()))
}
}
fn parent_allowed_caps() -> &'static gst::Caps {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut gst::ffi::GstElementClass;
let templ = gst::ffi::gst_element_class_get_pad_template(
parent_class,
glib::gstr!("sink").to_glib_none().0,
);
if templ.is_null() {
static ANY_AUDIO_CAPS: Lazy<gst::Caps> =
Lazy::new(|| crate::AudioCapsBuilder::new().build());
return &ANY_AUDIO_CAPS;
}
&*(&(*templ).caps as *const *mut gst::ffi::GstCaps as *const gst::Caps)
}
}
}
impl<T: AudioFilterImpl> AudioFilterImplExt for T {}