mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer-rs.git
synced 2024-05-19 16:58:22 +00:00
243 lines
7.9 KiB
Rust
243 lines
7.9 KiB
Rust
// Take a look at the license at the top of the repository in the LICENSE file.
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use std::{mem, ptr};
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use glib::translate::*;
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use gst_base::{prelude::*, subclass::prelude::*};
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use crate::VideoAggregator;
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pub struct AggregateFramesToken<'a>(pub(crate) &'a VideoAggregator);
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pub trait VideoAggregatorImpl: VideoAggregatorImplExt + AggregatorImpl {
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fn update_caps(&self, caps: &gst::Caps) -> Result<gst::Caps, gst::LoggableError> {
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self.parent_update_caps(caps)
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}
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fn aggregate_frames(
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&self,
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token: &AggregateFramesToken,
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outbuf: &mut gst::BufferRef,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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self.parent_aggregate_frames(token, outbuf)
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}
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fn create_output_buffer(&self) -> Result<Option<gst::Buffer>, gst::FlowError> {
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self.parent_create_output_buffer()
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}
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fn find_best_format(&self, downstream_caps: &gst::Caps) -> Option<(crate::VideoInfo, bool)> {
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self.parent_find_best_format(downstream_caps)
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}
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}
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mod sealed {
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pub trait Sealed {}
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impl<T: super::VideoAggregatorImplExt> Sealed for T {}
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}
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pub trait VideoAggregatorImplExt: sealed::Sealed + ObjectSubclass {
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fn parent_update_caps(&self, caps: &gst::Caps) -> Result<gst::Caps, gst::LoggableError> {
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unsafe {
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let data = Self::type_data();
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let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
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let f = (*parent_class)
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.update_caps
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.expect("Missing parent function `update_caps`");
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Option::<_>::from_glib_full(f(
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self.obj()
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.unsafe_cast_ref::<VideoAggregator>()
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.to_glib_none()
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.0,
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caps.as_mut_ptr(),
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))
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.ok_or_else(|| {
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gst::loggable_error!(gst::CAT_RUST, "Parent function `update_caps` failed")
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})
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}
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}
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fn parent_aggregate_frames(
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&self,
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token: &AggregateFramesToken,
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outbuf: &mut gst::BufferRef,
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) -> Result<gst::FlowSuccess, gst::FlowError> {
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assert_eq!(
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self.obj().as_ptr() as *mut ffi::GstVideoAggregator,
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token.0.as_ptr() as *mut ffi::GstVideoAggregator
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);
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unsafe {
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let data = Self::type_data();
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let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
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let f = (*parent_class)
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.aggregate_frames
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.expect("Missing parent function `aggregate_frames`");
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try_from_glib(f(
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self.obj()
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.unsafe_cast_ref::<VideoAggregator>()
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.to_glib_none()
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.0,
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// FIXME: Wrong pointer type
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outbuf.as_mut_ptr() as *mut *mut gst::ffi::GstBuffer,
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))
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}
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}
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fn parent_create_output_buffer(&self) -> Result<Option<gst::Buffer>, gst::FlowError> {
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unsafe {
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let data = Self::type_data();
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let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
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let f = (*parent_class)
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.create_output_buffer
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.expect("Missing parent function `create_output_buffer`");
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let mut buffer = ptr::null_mut();
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try_from_glib(f(
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self.obj()
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.unsafe_cast_ref::<VideoAggregator>()
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.to_glib_none()
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.0,
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&mut buffer,
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))
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.map(|_: gst::FlowSuccess| from_glib_full(buffer))
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}
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}
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fn parent_find_best_format(
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&self,
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downstream_caps: &gst::Caps,
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) -> Option<(crate::VideoInfo, bool)> {
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unsafe {
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let data = Self::type_data();
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let parent_class = data.as_ref().parent_class() as *mut ffi::GstVideoAggregatorClass;
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(*parent_class).find_best_format.and_then(|f| {
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let mut info = mem::MaybeUninit::uninit();
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ffi::gst_video_info_init(info.as_mut_ptr());
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let mut info = info.assume_init();
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let mut at_least_one_alpha = glib::ffi::GFALSE;
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f(
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self.obj()
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.unsafe_cast_ref::<VideoAggregator>()
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.to_glib_none()
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.0,
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downstream_caps.as_mut_ptr(),
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&mut info,
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&mut at_least_one_alpha,
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);
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if info.finfo.is_null() {
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None
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} else {
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Some((
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from_glib_none(mut_override(&info as *const ffi::GstVideoInfo)),
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from_glib(at_least_one_alpha),
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))
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}
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})
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}
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}
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}
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impl<T: VideoAggregatorImpl> VideoAggregatorImplExt for T {}
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unsafe impl<T: VideoAggregatorImpl> IsSubclassable<T> for VideoAggregator {
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fn class_init(klass: &mut glib::Class<Self>) {
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Self::parent_class_init::<T>(klass);
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let klass = klass.as_mut();
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klass.update_caps = Some(video_aggregator_update_caps::<T>);
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klass.aggregate_frames = Some(video_aggregator_aggregate_frames::<T>);
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klass.create_output_buffer = Some(video_aggregator_create_output_buffer::<T>);
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klass.find_best_format = Some(video_aggregator_find_best_format::<T>);
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}
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}
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unsafe extern "C" fn video_aggregator_update_caps<T: VideoAggregatorImpl>(
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ptr: *mut ffi::GstVideoAggregator,
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caps: *mut gst::ffi::GstCaps,
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) -> *mut gst::ffi::GstCaps {
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.imp();
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gst::panic_to_error!(imp, ptr::null_mut(), {
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match imp.update_caps(&from_glib_borrow(caps)) {
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Ok(caps) => caps.into_glib_ptr(),
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Err(err) => {
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err.log_with_imp(imp);
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ptr::null_mut()
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}
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}
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})
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}
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unsafe extern "C" fn video_aggregator_aggregate_frames<T: VideoAggregatorImpl>(
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ptr: *mut ffi::GstVideoAggregator,
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outbuf: *mut *mut gst::ffi::GstBuffer,
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) -> gst::ffi::GstFlowReturn {
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.imp();
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gst::panic_to_error!(imp, gst::FlowReturn::Error, {
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let instance = imp.obj();
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let instance = instance.unsafe_cast_ref::<VideoAggregator>();
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let token = AggregateFramesToken(instance);
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imp.aggregate_frames(
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&token,
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gst::BufferRef::from_mut_ptr(
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// Wrong pointer type
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outbuf as *mut gst::ffi::GstBuffer,
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),
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)
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.into()
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})
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.into_glib()
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}
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unsafe extern "C" fn video_aggregator_create_output_buffer<T: VideoAggregatorImpl>(
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ptr: *mut ffi::GstVideoAggregator,
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outbuf: *mut *mut gst::ffi::GstBuffer,
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) -> gst::ffi::GstFlowReturn {
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.imp();
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gst::panic_to_error!(imp, gst::FlowReturn::Error, {
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match imp.create_output_buffer() {
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Ok(buffer) => {
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*outbuf = buffer.map(|b| b.into_glib_ptr()).unwrap_or(ptr::null_mut());
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Ok(gst::FlowSuccess::Ok)
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}
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Err(err) => {
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*outbuf = ptr::null_mut();
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Err(err)
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}
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}
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.into()
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})
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.into_glib()
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}
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unsafe extern "C" fn video_aggregator_find_best_format<T: VideoAggregatorImpl>(
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ptr: *mut ffi::GstVideoAggregator,
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downstream_caps: *mut gst::ffi::GstCaps,
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best_info: *mut ffi::GstVideoInfo,
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at_least_one_alpha: *mut glib::ffi::gboolean,
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) {
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let instance = &*(ptr as *mut T::Instance);
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let imp = instance.imp();
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gst::panic_to_error!(imp, (), {
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match imp.find_best_format(&from_glib_borrow(downstream_caps)) {
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None => (),
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Some((info, alpha)) => {
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*best_info = *info.to_glib_none().0;
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*at_least_one_alpha = alpha.into_glib();
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}
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}
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})
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}
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