gl/gl_base_filter: Implement GLBaseFilterImpl virtual functions

gstreamer-gl/src/subclass/gl_base_filter.rs

@@ -0,0 +1,170 @@
+use ffi::GstGLBaseFilter;
+use gst::ffi::GstCaps;
+
+use crate::prelude::*;
+
+use glib::translate::*;
+
+use gst::subclass::prelude::*;
+use gst::{result_from_gboolean, Caps, LoggableError, CAT_RUST};
+use gst_base::subclass::prelude::*;
+
+use crate::GLBaseFilter;
+
+pub trait GLBaseFilterImpl: GLBaseFilterImplExt + BaseTransformImpl {
+    fn gl_set_caps(
+        &self,
+        filter: &Self::Type,
+        incaps: &Caps,
+        outcaps: &Caps,
+    ) -> Result<(), LoggableError> {
+        self.parent_gl_set_caps(filter, incaps, outcaps)
+    }
+
+    fn gl_start(&self, filter: &Self::Type) -> Result<(), LoggableError> {
+        self.parent_gl_start(filter)
+    }
+
+    fn gl_stop(&self, filter: &Self::Type) {
+        self.parent_gl_stop(filter)
+    }
+}
+
+pub trait GLBaseFilterImplExt: ObjectSubclass {
+    fn parent_gl_set_caps(
+        &self,
+        filter: &Self::Type,
+        incaps: &Caps,
+        outcaps: &Caps,
+    ) -> Result<(), LoggableError>;
+
+    fn parent_gl_start(&self, filter: &Self::Type) -> Result<(), LoggableError>;
+
+    fn parent_gl_stop(&self, filter: &Self::Type);
+}
+
+impl<T: GLBaseFilterImpl> GLBaseFilterImplExt for T {
+    fn parent_gl_set_caps(
+        &self,
+        filter: &Self::Type,
+        incaps: &Caps,
+        outcaps: &Caps,
+    ) -> Result<(), LoggableError> {
+        unsafe {
+            let data = T::type_data();
+            let parent_class = data.as_ref().parent_class() as *mut ffi::GstGLBaseFilterClass;
+
+            (*parent_class)
+                .gl_set_caps
+                .map(|f| {
+                    result_from_gboolean!(
+                        f(
+                            filter.unsafe_cast_ref::<GLBaseFilter>().to_glib_none().0,
+                            incaps.to_glib_none().0,
+                            outcaps.to_glib_none().0,
+                        ),
+                        CAT_RUST,
+                        "Parent function `gl_set_caps` failed",
+                    )
+                })
+                .unwrap_or(Ok(()))
+        }
+    }
+
+    fn parent_gl_start(&self, filter: &Self::Type) -> Result<(), LoggableError> {
+        unsafe {
+            let data = T::type_data();
+            let parent_class = data.as_ref().parent_class() as *mut ffi::GstGLBaseFilterClass;
+
+            (*parent_class)
+                .gl_start
+                .map(|f| {
+                    result_from_gboolean!(
+                        f(filter.unsafe_cast_ref::<GLBaseFilter>().to_glib_none().0),
+                        CAT_RUST,
+                        "Parent function `gl_start` failed",
+                    )
+                })
+                .unwrap_or(Ok(()))
+        }
+    }
+
+    fn parent_gl_stop(&self, filter: &Self::Type) {
+        unsafe {
+            let data = T::type_data();
+            let parent_class = data.as_ref().parent_class() as *mut ffi::GstGLBaseFilterClass;
+
+            if let Some(f) = (*parent_class).gl_stop {
+                f(filter.unsafe_cast_ref::<GLBaseFilter>().to_glib_none().0)
+            }
+        }
+    }
+}
+
+unsafe impl<T: GLBaseFilterImpl> IsSubclassable<T> for GLBaseFilter {
+    fn class_init(klass: &mut glib::Class<Self>) {
+        <gst_base::BaseTransform as IsSubclassable<T>>::class_init(klass);
+        let klass = klass.as_mut();
+        klass.gl_set_caps = Some(gl_set_caps::<T>);
+        klass.gl_start = Some(gl_start::<T>);
+        klass.gl_stop = Some(gl_stop::<T>);
+    }
+
+    fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
+        <gst_base::BaseTransform as IsSubclassable<T>>::instance_init(instance)
+    }
+}
+
+unsafe extern "C" fn gl_set_caps<T: GLBaseFilterImpl>(
+    ptr: *mut GstGLBaseFilter,
+    incaps: *mut GstCaps,
+    outcaps: *mut GstCaps,
+) -> glib::ffi::gboolean {
+    let instance = &*(ptr as *mut T::Instance);
+    let imp = instance.impl_();
+    let wrap: Borrowed<GLBaseFilter> = from_glib_borrow(ptr);
+
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
+        match imp.gl_set_caps(
+            wrap.unsafe_cast_ref(),
+            &from_glib_borrow(incaps),
+            &from_glib_borrow(outcaps),
+        ) {
+            Ok(()) => true,
+            Err(err) => {
+                err.log_with_object(&*wrap);
+                false
+            }
+        }
+    })
+    .to_glib()
+}
+
+unsafe extern "C" fn gl_start<T: GLBaseFilterImpl>(
+    ptr: *mut GstGLBaseFilter,
+) -> glib::ffi::gboolean {
+    let instance = &*(ptr as *mut T::Instance);
+    let imp = instance.impl_();
+    let wrap: Borrowed<GLBaseFilter> = from_glib_borrow(ptr);
+
+    gst::panic_to_error!(&wrap, &imp.panicked(), false, {
+        match imp.gl_start(wrap.unsafe_cast_ref()) {
+            Ok(()) => true,
+            Err(err) => {
+                err.log_with_object(&*wrap);
+                false
+            }
+        }
+    })
+    .to_glib()
+}
+
+unsafe extern "C" fn gl_stop<T: GLBaseFilterImpl>(ptr: *mut GstGLBaseFilter) {
+    let instance = &*(ptr as *mut T::Instance);
+    let imp = instance.impl_();
+    let wrap: Borrowed<GLBaseFilter> = from_glib_borrow(ptr);
+
+    gst::panic_to_error!(&wrap, &imp.panicked(), (), {
+        imp.gl_stop(wrap.unsafe_cast_ref())
+    })
+}

gstreamer-gl/src/subclass/mod.rs

@@ -0,0 +1,5 @@
+mod gl_base_filter;
+
+pub mod prelude {
+    pub use super::gl_base_filter::{GLBaseFilterImpl, GLBaseFilterImplExt};
+}