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gstreamer: Clean up meta code a bit

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This commit is contained in:
Sebastian Dröge 2021-09-19 14:19:45 +03:00
parent 9f1b8f6165
commit 80ee1edec5
1 changed files with 40 additions and 21 deletions
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61
gstreamer/src/meta.rs
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@ -16,10 +16,7 @@ use crate::CapsRef;
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
use crate::ClockTime;
use glib::translate::{from_glib, from_glib_none, FromGlib, ToGlibPtr};
#[cfg(any(feature = "v1_14", feature = "dox"))]
#[cfg_attr(feature = "dox", doc(cfg(feature = "v1_14")))]
use glib::translate::{try_from_glib, IntoGlib};
use glib::translate::*;
pub unsafe trait MetaAPI: Sync + Send + Sized {
type GstType;
@ -71,7 +68,7 @@ pub unsafe trait MetaAPI: Sync + Send + Sized {
#[derive(Debug, Clone, Copy, PartialOrd, Ord, PartialEq, Eq)]
pub struct MetaSeqnum(u64);
pub struct MetaRef<'a, T: MetaAPI + 'a> {
pub struct MetaRef<'a, T: 'a> {
meta: &'a T,
buffer: &'a BufferRef,
}
@ -79,13 +76,13 @@ pub struct MetaRef<'a, T: MetaAPI + 'a> {
pub enum Standalone {}
pub enum Iterated {}
pub struct MetaRefMut<'a, T: MetaAPI + 'a, U> {
pub struct MetaRefMut<'a, T: 'a, U> {
meta: &'a mut T,
buffer: &'a mut BufferRef,
mode: PhantomData<U>,
}
impl<'a, T: MetaAPI + fmt::Debug + 'a> fmt::Debug for MetaRef<'a, T> {
impl<'a, T: fmt::Debug + 'a> fmt::Debug for MetaRef<'a, T> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("MetaRef")
.field("meta", &self.meta)
@ -94,7 +91,7 @@ impl<'a, T: MetaAPI + fmt::Debug + 'a> fmt::Debug for MetaRef<'a, T> {
}
}
impl<'a, T: MetaAPI + fmt::Debug + 'a, U> fmt::Debug for MetaRefMut<'a, T, U> {
impl<'a, T: fmt::Debug + 'a, U> fmt::Debug for MetaRefMut<'a, T, U> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.debug_struct("MetaRef")
.field("meta", &self.meta)
@ -104,7 +101,7 @@ impl<'a, T: MetaAPI + fmt::Debug + 'a, U> fmt::Debug for MetaRefMut<'a, T, U> {
}
}
impl<'a, T: MetaAPI> ops::Deref for MetaRef<'a, T> {
impl<'a, T> ops::Deref for MetaRef<'a, T> {
type Target = T;
fn deref(&self) -> &T {
@ -112,13 +109,13 @@ impl<'a, T: MetaAPI> ops::Deref for MetaRef<'a, T> {
}
}
impl<'a, T: MetaAPI> AsRef<MetaRef<'a, T>> for MetaRef<'a, T> {
impl<'a, T> AsRef<MetaRef<'a, T>> for MetaRef<'a, T> {
fn as_ref(&self) -> &MetaRef<'a, T> {
self
}
}
impl<'a, T: MetaAPI, U> ops::Deref for MetaRefMut<'a, T, U> {
impl<'a, T, U> ops::Deref for MetaRefMut<'a, T, U> {
type Target = T;
fn deref(&self) -> &T {
@ -126,19 +123,19 @@ impl<'a, T: MetaAPI, U> ops::Deref for MetaRefMut<'a, T, U> {
}
}
impl<'a, T: MetaAPI, U> ops::DerefMut for MetaRefMut<'a, T, U> {
impl<'a, T, U> ops::DerefMut for MetaRefMut<'a, T, U> {
fn deref_mut(&mut self) -> &mut T {
self.meta
}
}
impl<'a, T: MetaAPI, U> AsRef<MetaRef<'a, T>> for MetaRefMut<'a, T, U> {
impl<'a, T, U> AsRef<MetaRef<'a, T>> for MetaRefMut<'a, T, U> {
fn as_ref(&self) -> &MetaRef<'a, T> {
unsafe { &*(self as *const MetaRefMut<'a, T, U> as *const MetaRef<'a, T>) }
}
}
impl<'a, T: MetaAPI> MetaRef<'a, T> {
impl<'a, T> MetaRef<'a, T> {
#[doc(alias = "get_api")]
pub fn api(&self) -> glib::Type {
unsafe {
@ -159,7 +156,10 @@ impl<'a, T: MetaAPI> MetaRef<'a, T> {
}
}
pub fn as_ptr(&self) -> *const T::GstType {
pub fn as_ptr(&self) -> *const T::GstType
where
T: MetaAPI,
{
self.meta as *const _ as *const <T as MetaAPI>::GstType
}
}
@ -177,7 +177,7 @@ impl<'a> MetaRef<'a, Meta> {
}
}
impl<'a, T: MetaAPI, U> MetaRefMut<'a, T, U> {
impl<'a, T, U> MetaRefMut<'a, T, U> {
#[doc(alias = "get_api")]
pub fn api(&self) -> glib::Type {
unsafe {
@ -198,22 +198,28 @@ impl<'a, T: MetaAPI, U> MetaRefMut<'a, T, U> {
}
}
pub fn as_ptr(&self) -> *const T::GstType {
pub fn as_ptr(&self) -> *const T::GstType
where
T: MetaAPI,
{
self.meta as *const _ as *const <T as MetaAPI>::GstType
}
pub fn as_mut_ptr(&mut self) -> *mut T::GstType {
pub fn as_mut_ptr(&mut self) -> *mut T::GstType
where
T: MetaAPI,
{
self.meta as *mut _ as *mut <T as MetaAPI>::GstType
}
}
impl<'a, T: MetaAPI> MetaRefMut<'a, T, Standalone> {
impl<'a, T> MetaRefMut<'a, T, Standalone> {
#[doc(alias = "gst_buffer_remove_meta")]
pub fn remove(mut self) {
pub fn remove(self) {
unsafe {
let res = ffi::gst_buffer_remove_meta(
self.buffer.as_mut_ptr(),
self.as_mut_ptr() as *mut ffi::GstMeta,
self.meta as *mut T as *mut ffi::GstMeta,
);
assert_ne!(res, glib::ffi::GFALSE);
}
@ -231,6 +237,19 @@ impl<'a, U> MetaRefMut<'a, Meta, U> {
None
}
}
pub fn downcast_mut<T: MetaAPI>(&mut self) -> Option<&mut MetaRefMut<'a, T, U>> {
let target_type = T::meta_api();
let type_ = self.api();
if type_ == glib::Type::INVALID || target_type == type_ {
Some(unsafe {
&mut *(self as *mut MetaRefMut<'a, Meta, U> as *mut MetaRefMut<'a, T, U>)
})
} else {
None
}
}
}
#[repr(transparent)]