mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-06-02 13:29:29 +00:00
53aae7ddba
The latter stay e.g. gst_debug! to be more clear and not conflict with e.g. the debug! macro from the log crate.
81 lines
2.3 KiB
Rust
81 lines
2.3 KiB
Rust
// Take a look at the license at the top of the repository in the LICENSE file.
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use glib::prelude::*;
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use glib::subclass::prelude::*;
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use glib::translate::*;
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use gst::subclass::prelude::*;
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use gst_base::subclass::prelude::*;
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use crate::VideoSink;
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pub trait VideoSinkImpl: VideoSinkImplExt + BaseSinkImpl + ElementImpl {
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fn show_frame(
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&self,
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element: &Self::Type,
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buffer: &gst::Buffer,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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self.parent_show_frame(element, buffer)
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}
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}
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pub trait VideoSinkImplExt: ObjectSubclass {
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fn parent_show_frame(
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&self,
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element: &Self::Type,
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buffer: &gst::Buffer,
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) -> Result<gst::FlowSuccess, gst::FlowError>;
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}
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impl<T: VideoSinkImpl> VideoSinkImplExt for T {
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fn parent_show_frame(
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&self,
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element: &Self::Type,
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buffer: &gst::Buffer,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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unsafe {
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let data = T::type_data();
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let parent_class = data.as_ref().get_parent_class() as *mut ffi::GstVideoSinkClass;
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(*parent_class)
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.show_frame
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.map(|f| {
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gst::FlowReturn::from_glib(f(
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element.unsafe_cast_ref::<VideoSink>().to_glib_none().0,
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buffer.to_glib_none().0,
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))
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})
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.unwrap_or(gst::FlowReturn::Error)
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.into_result()
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}
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}
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}
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unsafe impl<T: VideoSinkImpl> IsSubclassable<T> for VideoSink
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where
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<T as ObjectSubclass>::Instance: PanicPoison,
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{
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fn override_vfuncs(klass: &mut glib::Class<Self>) {
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<gst_base::BaseSink as IsSubclassable<T>>::override_vfuncs(klass);
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let klass = klass.as_mut();
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klass.show_frame = Some(video_sink_show_frame::<T>);
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}
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}
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unsafe extern "C" fn video_sink_show_frame<T: VideoSinkImpl>(
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ptr: *mut ffi::GstVideoSink,
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buffer: *mut gst::ffi::GstBuffer,
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) -> gst::ffi::GstFlowReturn
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where
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T::Instance: PanicPoison,
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{
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.get_impl();
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let wrap: Borrowed<VideoSink> = from_glib_borrow(ptr);
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let buffer = from_glib_borrow(buffer);
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gst::panic_to_error!(&wrap, &instance.panicked(), gst::FlowReturn::Error, {
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imp.show_frame(wrap.unsafe_cast_ref(), &buffer).into()
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})
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.to_glib()
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}
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