gl: Add subclass implementation for GLBaseSrc, inheriting PushSrc

This commit is contained in:
Marijn Suijten 2021-04-29 18:13:37 +02:00
parent bdb60b57ad
commit 6ee12d49ee
2 changed files with 162 additions and 0 deletions

View file

@ -0,0 +1,156 @@
use ffi::{GstGLBaseSrc, GstGLMemory};
use crate::prelude::*;
use glib::translate::*;
use gst::{result_from_gboolean, LoggableError, CAT_RUST};
use gst_base::subclass::prelude::*;
use crate::{GLBaseSrc, GLMemory, GLAPI};
pub trait GLBaseSrcImpl: GLBaseSrcImplExt + PushSrcImpl {
const SUPPORTED_GL_API: GLAPI;
fn gl_start(&self, element: &Self::Type) -> Result<(), LoggableError> {
self.parent_gl_start(element)
}
fn gl_stop(&self, element: &Self::Type) {
self.parent_gl_stop(element)
}
fn fill_gl_memory(&self, element: &Self::Type, memory: &GLMemory) -> Result<(), LoggableError> {
self.parent_fill_gl_memory(element, memory)
}
}
pub trait GLBaseSrcImplExt: ObjectSubclass {
fn parent_gl_start(&self, element: &Self::Type) -> Result<(), LoggableError>;
fn parent_gl_stop(&self, element: &Self::Type);
fn parent_fill_gl_memory(
&self,
element: &Self::Type,
memory: &GLMemory,
) -> Result<(), LoggableError>;
}
impl<T: GLBaseSrcImpl> GLBaseSrcImplExt for T {
fn parent_gl_start(&self, element: &Self::Type) -> Result<(), LoggableError> {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstGLBaseSrcClass;
(*parent_class)
.gl_start
.map(|f| {
result_from_gboolean!(
f(element.unsafe_cast_ref::<GLBaseSrc>().to_glib_none().0),
CAT_RUST,
"Parent function `gl_start` failed",
)
})
.unwrap_or(Ok(()))
}
}
fn parent_gl_stop(&self, element: &Self::Type) {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstGLBaseSrcClass;
if let Some(f) = (*parent_class).gl_stop {
f(element.unsafe_cast_ref::<GLBaseSrc>().to_glib_none().0)
}
}
}
fn parent_fill_gl_memory(
&self,
element: &Self::Type,
memory: &GLMemory,
) -> Result<(), LoggableError> {
unsafe {
let data = T::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstGLBaseSrcClass;
(*parent_class)
.fill_gl_memory
.map(|f| {
result_from_gboolean!(
f(
element.unsafe_cast_ref::<GLBaseSrc>().to_glib_none().0,
mut_override(memory.to_glib_none().0),
),
CAT_RUST,
"Parent function `fill_gl_memory` failed",
)
})
.unwrap_or(Ok(()))
}
}
}
unsafe impl<T: GLBaseSrcImpl> IsSubclassable<T> for GLBaseSrc {
fn class_init(klass: &mut glib::Class<Self>) {
<gst_base::PushSrc as IsSubclassable<T>>::class_init(klass);
let klass = klass.as_mut();
klass.supported_gl_api = T::SUPPORTED_GL_API.into_glib();
klass.gl_start = Some(gl_start::<T>);
klass.gl_stop = Some(gl_stop::<T>);
klass.fill_gl_memory = Some(fill_gl_memory::<T>);
}
fn instance_init(instance: &mut glib::subclass::InitializingObject<T>) {
<gst_base::PushSrc as IsSubclassable<T>>::instance_init(instance)
}
}
unsafe extern "C" fn gl_start<T: GLBaseSrcImpl>(ptr: *mut GstGLBaseSrc) -> glib::ffi::gboolean {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.impl_();
let wrap: Borrowed<GLBaseSrc> = 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
}
}
})
.into_glib()
}
unsafe extern "C" fn gl_stop<T: GLBaseSrcImpl>(ptr: *mut GstGLBaseSrc) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.impl_();
let wrap: Borrowed<GLBaseSrc> = from_glib_borrow(ptr);
gst::panic_to_error!(&wrap, &imp.panicked(), (), {
imp.gl_stop(wrap.unsafe_cast_ref())
})
}
unsafe extern "C" fn fill_gl_memory<T: GLBaseSrcImpl>(
ptr: *mut GstGLBaseSrc,
memory: *mut GstGLMemory,
) -> glib::ffi::gboolean {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.impl_();
let wrap: Borrowed<GLBaseSrc> = from_glib_borrow(ptr);
gst::panic_to_error!(&wrap, &imp.panicked(), false, {
match imp.fill_gl_memory(wrap.unsafe_cast_ref(), &from_glib_borrow(memory)) {
Ok(()) => true,
Err(err) => {
err.log_with_object(&*wrap);
false
}
}
})
.into_glib()
}

View file

@ -1,4 +1,7 @@
mod gl_base_filter;
#[cfg(any(feature = "v1_18", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
mod gl_base_src;
mod gl_filter;
pub use self::gl_filter::GLFilterMode;
@ -8,5 +11,8 @@ pub mod prelude {
pub use gst_video::subclass::prelude::*;
pub use super::gl_base_filter::{GLBaseFilterImpl, GLBaseFilterImplExt};
#[cfg(any(feature = "v1_18", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_18")))]
pub use super::gl_base_src::{GLBaseSrcImpl, GLBaseSrcImplExt};
pub use super::gl_filter::{GLFilterImpl, GLFilterImplExt};
}