video: Add subclass bindings for VideoAggregator

This commit is contained in:
Sebastian Dröge 2022-03-21 19:59:25 +02:00
parent dcab2553bf
commit 6a76e19e78
3 changed files with 514 additions and 0 deletions

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@ -3,6 +3,12 @@
#![allow(clippy::cast_ptr_alignment)]
mod navigation;
#[cfg(any(feature = "v1_16", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
mod video_aggregator;
#[cfg(any(feature = "v1_16", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
mod video_aggregator_pad;
mod video_decoder;
mod video_encoder;
mod video_filter;
@ -17,6 +23,12 @@ pub mod prelude {
pub use gst_base::subclass::prelude::*;
pub use super::navigation::NavigationImpl;
#[cfg(any(feature = "v1_16", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
pub use super::video_aggregator::{VideoAggregatorImpl, VideoAggregatorImplExt};
#[cfg(any(feature = "v1_16", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_16")))]
pub use super::video_aggregator_pad::{VideoAggregatorPadImpl, VideoAggregatorPadImplExt};
pub use super::video_decoder::{VideoDecoderImpl, VideoDecoderImplExt};
pub use super::video_encoder::{VideoEncoderImpl, VideoEncoderImplExt};
pub use super::video_filter::{VideoFilterImpl, VideoFilterImplExt};

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@ -0,0 +1,289 @@
// Take a look at the license at the top of the repository in the LICENSE file.
use glib::translate::*;
use gst_base::prelude::*;
use gst_base::subclass::prelude::*;
use std::mem;
use std::ptr;
use crate::VideoAggregator;
pub struct AggregateFramesToken<'a>(pub(crate) &'a VideoAggregator);
pub trait VideoAggregatorImpl: VideoAggregatorImplExt + AggregatorImpl {
fn update_caps(
&self,
element: &Self::Type,
caps: &gst::Caps,
) -> Result<gst::Caps, gst::LoggableError> {
self.parent_update_caps(element, caps)
}
fn aggregate_frames(
&self,
element: &Self::Type,
token: &AggregateFramesToken,
outbuf: &mut gst::BufferRef,
) -> Result<gst::FlowSuccess, gst::FlowError> {
self.parent_aggregate_frames(element, token, outbuf)
}
fn create_output_buffer(
&self,
element: &Self::Type,
) -> Result<Option<gst::Buffer>, gst::FlowError> {
self.parent_create_output_buffer(element)
}
fn find_best_format(
&self,
element: &Self::Type,
downstream_caps: &gst::Caps,
) -> Option<(crate::VideoInfo, bool)> {
self.parent_find_best_format(element, downstream_caps)
}
}
pub trait VideoAggregatorImplExt: ObjectSubclass {
fn parent_update_caps(
&self,
element: &Self::Type,
caps: &gst::Caps,
) -> Result<gst::Caps, gst::LoggableError>;
fn parent_aggregate_frames(
&self,
element: &Self::Type,
token: &AggregateFramesToken,
outbuf: &mut gst::BufferRef,
) -> Result<gst::FlowSuccess, gst::FlowError>;
fn parent_create_output_buffer(
&self,
element: &Self::Type,
) -> Result<Option<gst::Buffer>, gst::FlowError>;
fn parent_find_best_format(
&self,
element: &Self::Type,
downstream_caps: &gst::Caps,
) -> Option<(crate::VideoInfo, bool)>;
}
impl<T: VideoAggregatorImpl> VideoAggregatorImplExt for T {
fn parent_update_caps(
&self,
element: &Self::Type,
caps: &gst::Caps,
) -> Result<gst::Caps, gst::LoggableError> {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
let f = (*parent_class)
.update_caps
.expect("Missing parent function `update_caps`");
Option::<_>::from_glib_full(f(
element
.unsafe_cast_ref::<VideoAggregator>()
.to_glib_none()
.0,
caps.as_mut_ptr(),
))
.ok_or_else(|| {
gst::loggable_error!(gst::CAT_RUST, "Parent function `update_caps` failed")
})
}
}
fn parent_aggregate_frames(
&self,
element: &Self::Type,
token: &AggregateFramesToken,
outbuf: &mut gst::BufferRef,
) -> Result<gst::FlowSuccess, gst::FlowError> {
assert_eq!(
element.as_ptr() as *mut ffi::GstVideoAggregator,
token.0.as_ptr() as *mut ffi::GstVideoAggregator
);
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
let f = (*parent_class)
.aggregate_frames
.expect("Missing parent function `aggregate_frames`");
try_from_glib(f(
element
.unsafe_cast_ref::<VideoAggregator>()
.to_glib_none()
.0,
// FIXME: Wrong pointer type
outbuf.as_mut_ptr() as *mut *mut gst::ffi::GstBuffer,
))
}
}
fn parent_create_output_buffer(
&self,
element: &Self::Type,
) -> Result<Option<gst::Buffer>, gst::FlowError> {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
let f = (*parent_class)
.create_output_buffer
.expect("Missing parent function `create_output_buffer`");
let mut buffer = ptr::null_mut();
try_from_glib(f(
element
.unsafe_cast_ref::<VideoAggregator>()
.to_glib_none()
.0,
&mut buffer,
))
.map(|_: gst::FlowSuccess| from_glib_full(buffer))
}
}
fn parent_find_best_format(
&self,
element: &Self::Type,
downstream_caps: &gst::Caps,
) -> Option<(crate::VideoInfo, bool)> {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
(*parent_class).find_best_format.and_then(|f| {
let mut info = mem::MaybeUninit::zeroed();
ffi::gst_video_info_init(info.as_mut_ptr());
let mut info = info.assume_init();
let mut at_least_one_alpha = glib::ffi::GFALSE;
f(
element
.unsafe_cast_ref::<VideoAggregator>()
.to_glib_none()
.0,
downstream_caps.as_mut_ptr(),
&mut info,
&mut at_least_one_alpha,
);
if info.finfo.is_null() {
None
} else {
Some((
from_glib_none(mut_override(&info as *const ffi::GstVideoInfo)),
from_glib(at_least_one_alpha),
))
}
})
}
}
}
unsafe impl<T: VideoAggregatorImpl> IsSubclassable<T> for VideoAggregator {
fn class_init(klass: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(klass);
let klass = klass.as_mut();
klass.update_caps = Some(video_aggregator_update_caps::<T>);
klass.aggregate_frames = Some(video_aggregator_aggregate_frames::<T>);
klass.create_output_buffer = Some(video_aggregator_create_output_buffer::<T>);
klass.find_best_format = Some(video_aggregator_find_best_format::<T>);
}
}
unsafe extern "C" fn video_aggregator_update_caps<T: VideoAggregatorImpl>(
ptr: *mut ffi::GstVideoAggregator,
caps: *mut gst::ffi::GstCaps,
) -> *mut gst::ffi::GstCaps {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregator> = from_glib_borrow(ptr);
gst::panic_to_error!(&wrap, imp.panicked(), ptr::null_mut(), {
match imp.update_caps(wrap.unsafe_cast_ref(), &from_glib_borrow(caps)) {
Ok(caps) => caps.into_ptr(),
Err(err) => {
err.log_with_object(&*wrap);
ptr::null_mut()
}
}
})
}
unsafe extern "C" fn video_aggregator_aggregate_frames<T: VideoAggregatorImpl>(
ptr: *mut ffi::GstVideoAggregator,
outbuf: *mut *mut gst::ffi::GstBuffer,
) -> gst::ffi::GstFlowReturn {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregator> = from_glib_borrow(ptr);
gst::panic_to_error!(&wrap, imp.panicked(), gst::FlowReturn::Error, {
let token = AggregateFramesToken(&*wrap);
imp.aggregate_frames(
wrap.unsafe_cast_ref(),
&token,
gst::BufferRef::from_mut_ptr(
// Wrong pointer type
outbuf as *mut gst::ffi::GstBuffer,
),
)
.into()
})
.into_glib()
}
unsafe extern "C" fn video_aggregator_create_output_buffer<T: VideoAggregatorImpl>(
ptr: *mut ffi::GstVideoAggregator,
outbuf: *mut *mut gst::ffi::GstBuffer,
) -> gst::ffi::GstFlowReturn {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregator> = from_glib_borrow(ptr);
gst::panic_to_error!(&wrap, imp.panicked(), gst::FlowReturn::Error, {
match imp.create_output_buffer(wrap.unsafe_cast_ref()) {
Ok(buffer) => {
*outbuf = buffer.map(|b| b.into_ptr()).unwrap_or(ptr::null_mut());
Ok(gst::FlowSuccess::Ok)
}
Err(err) => {
*outbuf = ptr::null_mut();
Err(err)
}
}
.into()
})
.into_glib()
}
unsafe extern "C" fn video_aggregator_find_best_format<T: VideoAggregatorImpl>(
ptr: *mut ffi::GstVideoAggregator,
downstream_caps: *mut gst::ffi::GstCaps,
best_info: *mut ffi::GstVideoInfo,
at_least_one_alpha: *mut glib::ffi::gboolean,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregator> = from_glib_borrow(ptr);
gst::panic_to_error!(&wrap, imp.panicked(), (), {
match imp.find_best_format(wrap.unsafe_cast_ref(), &from_glib_borrow(downstream_caps)) {
None => (),
Some((info, alpha)) => {
*best_info = *info.to_glib_none().0;
*at_least_one_alpha = alpha.into_glib();
}
}
})
}

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@ -0,0 +1,213 @@
// Take a look at the license at the top of the repository in the LICENSE file.
use glib::translate::*;
use gst_base::prelude::*;
use gst_base::subclass::prelude::*;
use std::mem;
use std::ptr;
use crate::subclass::AggregateFramesToken;
use crate::VideoAggregator;
use crate::VideoAggregatorPad;
pub trait VideoAggregatorPadImpl: VideoAggregatorPadImplExt + AggregatorPadImpl {
fn update_conversion_info(&self, pad: &Self::Type) {
self.parent_update_conversion_info(pad)
}
fn prepare_frame(
&self,
pad: &Self::Type,
aggregator: &crate::VideoAggregator,
token: &AggregateFramesToken,
buffer: &gst::Buffer,
) -> Option<crate::VideoFrame<crate::video_frame::Readable>> {
self.parent_prepare_frame(pad, aggregator, token, buffer)
}
fn clean_frame(
&self,
pad: &Self::Type,
aggregator: &crate::VideoAggregator,
token: &AggregateFramesToken,
frame: Option<crate::VideoFrame<crate::video_frame::Readable>>,
) {
self.parent_clean_frame(pad, aggregator, token, frame)
}
}
pub trait VideoAggregatorPadImplExt: ObjectSubclass {
fn parent_update_conversion_info(&self, pad: &Self::Type);
fn parent_prepare_frame(
&self,
pad: &Self::Type,
aggregator: &crate::VideoAggregator,
token: &AggregateFramesToken,
buffer: &gst::Buffer,
) -> Option<crate::VideoFrame<crate::video_frame::Readable>>;
fn parent_clean_frame(
&self,
pad: &Self::Type,
aggregator: &crate::VideoAggregator,
token: &AggregateFramesToken,
frame: Option<crate::VideoFrame<crate::video_frame::Readable>>,
);
}
impl<T: VideoAggregatorPadImpl> VideoAggregatorPadImplExt for T {
fn parent_update_conversion_info(&self, pad: &Self::Type) {
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorPadClass;
if let Some(f) = (*parent_class).update_conversion_info {
f(pad.unsafe_cast_ref::<VideoAggregatorPad>().to_glib_none().0);
}
}
}
fn parent_prepare_frame(
&self,
pad: &Self::Type,
aggregator: &crate::VideoAggregator,
token: &AggregateFramesToken,
buffer: &gst::Buffer,
) -> Option<crate::VideoFrame<crate::video_frame::Readable>> {
assert_eq!(
aggregator.as_ptr() as *mut ffi::GstVideoAggregator,
token.0.as_ptr() as *mut ffi::GstVideoAggregator
);
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorPadClass;
if let Some(f) = (*parent_class).prepare_frame {
let mut prepared_frame = mem::MaybeUninit::zeroed();
f(
pad.unsafe_cast_ref::<VideoAggregatorPad>().to_glib_none().0,
aggregator.to_glib_none().0,
buffer.as_mut_ptr(),
prepared_frame.as_mut_ptr(),
);
let prepared_frame = prepared_frame.assume_init();
if prepared_frame.buffer.is_null() {
None
} else {
Some(crate::VideoFrame::from_glib_full(prepared_frame))
}
} else {
None
}
}
}
fn parent_clean_frame(
&self,
pad: &Self::Type,
aggregator: &crate::VideoAggregator,
token: &AggregateFramesToken,
frame: Option<crate::VideoFrame<crate::video_frame::Readable>>,
) {
assert_eq!(
aggregator.as_ptr() as *mut ffi::GstVideoAggregator,
token.0.as_ptr() as *mut ffi::GstVideoAggregator
);
unsafe {
let data = Self::type_data();
let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorPadClass;
if let Some(f) = (*parent_class).clean_frame {
let mut prepared_frame = if let Some(frame) = frame {
frame.into_raw()
} else {
mem::zeroed()
};
f(
pad.unsafe_cast_ref::<VideoAggregatorPad>().to_glib_none().0,
aggregator.to_glib_none().0,
&mut prepared_frame,
);
}
}
}
}
unsafe impl<T: VideoAggregatorPadImpl> IsSubclassable<T> for VideoAggregatorPad {
fn class_init(klass: &mut glib::Class<Self>) {
Self::parent_class_init::<T>(klass);
let klass = klass.as_mut();
klass.update_conversion_info = Some(video_aggregator_pad_update_conversion_info::<T>);
klass.prepare_frame = Some(video_aggregator_pad_prepare_frame::<T>);
klass.clean_frame = Some(video_aggregator_pad_clean_frame::<T>);
}
}
unsafe extern "C" fn video_aggregator_pad_update_conversion_info<T: VideoAggregatorPadImpl>(
ptr: *mut ffi::GstVideoAggregatorPad,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregatorPad> = from_glib_borrow(ptr);
imp.update_conversion_info(wrap.unsafe_cast_ref());
}
unsafe extern "C" fn video_aggregator_pad_prepare_frame<T: VideoAggregatorPadImpl>(
ptr: *mut ffi::GstVideoAggregatorPad,
aggregator: *mut ffi::GstVideoAggregator,
buffer: *mut gst::ffi::GstBuffer,
prepared_frame: *mut ffi::GstVideoFrame,
) -> glib::ffi::gboolean {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregatorPad> = from_glib_borrow(ptr);
let aggregator: Borrowed<VideoAggregator> = from_glib_borrow(aggregator);
let token = AggregateFramesToken(&*aggregator);
match imp.prepare_frame(
wrap.unsafe_cast_ref(),
&aggregator,
&token,
&from_glib_borrow(buffer),
) {
Some(frame) => {
*prepared_frame = frame.into_raw();
}
None => {
ptr::write(prepared_frame, mem::zeroed());
}
}
glib::ffi::GTRUE
}
unsafe extern "C" fn video_aggregator_pad_clean_frame<T: VideoAggregatorPadImpl>(
ptr: *mut ffi::GstVideoAggregatorPad,
aggregator: *mut ffi::GstVideoAggregator,
prepared_frame: *mut ffi::GstVideoFrame,
) {
let instance = &*(ptr as *mut T::Instance);
let imp = instance.imp();
let wrap: Borrowed<VideoAggregatorPad> = from_glib_borrow(ptr);
let aggregator: Borrowed<VideoAggregator> = from_glib_borrow(aggregator);
let token = AggregateFramesToken(&*aggregator);
let frame = if (*prepared_frame).buffer.is_null() {
None
} else {
let frame = crate::VideoFrame::from_glib_full(*prepared_frame);
ptr::write(prepared_frame, mem::zeroed());
Some(frame)
};
imp.clean_frame(wrap.unsafe_cast_ref(), &aggregator, &token, frame);
}