Struct VTTemporalNoiseFilterConfiguration 

pub struct VTTemporalNoiseFilterConfiguration { /* private fields */ }

Available on crate features VTFrameProcessor_TemporalNoiseFilter and objc2 only.

A configuration object to initiate a frame processor and use temporal noise-filter processor.

The class properties of VTTemporalNoiseFilterConfiguration help to identify the capabilities of temporal noise filter processor on the current platform, prior to initiating a session. You can confirm the availability of temporal noise-filter processor in the current platform by checking the isSupported class property. Verify the processor’s capability to process source frames by ensuring that the dimensions are no less than minimumDimensions and no greater than maximumDimensions. Use the instance properties such as frameSupportedPixelFormats, sourcePixelBufferAttributes, and destinationPixelBufferAttributes to ensure that the input and output pixel buffer formats and attributes of the processor align with the client’s specific requirements. The properties previousFrameCount and nextFrameCount represent the maximum number of preceding and subsequent reference frames, used in the processing of a source frame, to achieve optimum noise-reduction quality.

See also Apple’s documentation

Implementations

impl VTTemporalNoiseFilterConfiguration

pub unsafe fn initWithFrameWidth_frameHeight_sourcePixelFormat( this: Allocated<Self>, frame_width: NSInteger, frame_height: NSInteger, source_pixel_format: u32, ) -> Option<Retained<Self>>

Creates a new temporal noise-processor configuration.

Returns nil if frameWidth, frameHeight, or sourcePixelFormat is unsupported.

• Parameters:
• frameWidth: Width of source frame in pixels.
• frameHeight: Height of source frame in pixels.

pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

pub unsafe fn new() -> Retained<Self>

pub unsafe fn frameWidth(&self) -> NSInteger

Width of source frame in pixels.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn frameHeight(&self) -> NSInteger

Height of source frame in pixels.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn frameSupportedPixelFormats(&self) -> Retained<NSArray<NSNumber>>

Available on crate feature objc2-foundation only.

Supported pixel formats for source frames for current configuration.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn sourcePixelBufferAttributes( &self, ) -> Retained<NSDictionary<NSString, AnyObject>>

Available on crate feature objc2-foundation only.

Pixel buffer attributes dictionary that describes requirements for pixel buffers which represent source frames and reference frames.

Use CVPixelBufferCreateResolvedAttributesDictionary to combine this dictionary with your pixel buffer attributes dictionary.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn destinationPixelBufferAttributes( &self, ) -> Retained<NSDictionary<NSString, AnyObject>>

Available on crate feature objc2-foundation only.

Pixel buffer attributes dictionary that describes requirements for pixel buffers which represent destination frames.

Use CVPixelBufferCreateResolvedAttributesDictionary to combine this dictionary with your pixel buffer attributes dictionary.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn nextFrameCount(&self) -> NSInteger

Maximum number of future reference frames that the processor can use to process a source frame.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn previousFrameCount(&self) -> NSInteger

Maximum number of past reference frames that the processor can use to process a source frame.

This property is not atomic.

Safety

This might not be thread-safe.

pub unsafe fn supportedSourcePixelFormats() -> Retained<NSArray<NSNumber>>

Available on crate feature objc2-foundation only.

List of all supported pixel formats for source frames.

pub unsafe fn maximumDimensions() -> CMVideoDimensions

Available on crate feature objc2-core-media only.

The maximum dimensions of a source frame that the processor supports.

pub unsafe fn minimumDimensions() -> CMVideoDimensions

Available on crate feature objc2-core-media only.

The minimum dimensions of a source frame that the processor supports.

pub unsafe fn isSupported() -> bool

Reports whether the system supports this processor.

Methods from Deref<Target = NSObject>

pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>

pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T

where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

pub fn downcast_ref<T>(&self) -> Option<&T>

where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}

Trait Implementations

impl AsRef<AnyObject> for VTTemporalNoiseFilterConfiguration

fn as_ref(&self) -> &AnyObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<NSObject> for VTTemporalNoiseFilterConfiguration

fn as_ref(&self) -> &NSObject

Converts this type into a shared reference of the (usually inferred) input type.

impl AsRef<VTTemporalNoiseFilterConfiguration> for VTTemporalNoiseFilterConfiguration

fn as_ref(&self) -> &Self

Converts this type into a shared reference of the (usually inferred) input type.

impl Borrow<AnyObject> for VTTemporalNoiseFilterConfiguration

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<NSObject> for VTTemporalNoiseFilterConfiguration

fn borrow(&self) -> &NSObject

Immutably borrows from an owned value.

impl ClassType for VTTemporalNoiseFilterConfiguration

const NAME: &'static str = "VTTemporalNoiseFilterConfiguration"

The name of the Objective-C class that this type represents.

type Super = NSObject

The superclass of this class.

type ThreadKind = <<VTTemporalNoiseFilterConfiguration as ClassType>::Super as ClassType>::ThreadKind

Whether the type can be used from any thread, or from only the main thread.

fn class() -> &'static AnyClass

Get a reference to the Objective-C class that this type represents.

fn as_super(&self) -> &Self::Super

Get an immutable reference to the superclass.

impl Debug for VTTemporalNoiseFilterConfiguration

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Deref for VTTemporalNoiseFilterConfiguration

type Target = NSObject

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl Hash for VTTemporalNoiseFilterConfiguration

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for VTTemporalNoiseFilterConfiguration

fn retain(&self) -> Retained<Self>

where Self: Sized,

Increment the reference count of the receiver.

impl NSObjectProtocol for VTTemporalNoiseFilterConfiguration

fn isEqual(&self, other: Option<&AnyObject>) -> bool

where Self: Sized + Message,

Check whether the object is equal to an arbitrary other object.

fn hash(&self) -> usize

where Self: Sized + Message,

An integer that can be used as a table address in a hash table structure.

fn isKindOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of the class, or one of its subclasses.

fn is_kind_of<T>(&self) -> bool

where T: ClassType, Self: Sized + Message,

👎Deprecated: use isKindOfClass directly, or cast your objects with AnyObject::downcast_ref

Check if the object is an instance of the class type, or one of its subclasses.

fn isMemberOfClass(&self, cls: &AnyClass) -> bool

where Self: Sized + Message,

Check if the object is an instance of a specific class, without checking subclasses.

fn respondsToSelector(&self, aSelector: Sel) -> bool

where Self: Sized + Message,

Check whether the object implements or inherits a method with the given selector.

fn conformsToProtocol(&self, aProtocol: &AnyProtocol) -> bool

where Self: Sized + Message,

Check whether the object conforms to a given protocol.

fn description(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object.

fn debugDescription(&self) -> Retained<NSObject>

where Self: Sized + Message,

A textual representation of the object to use when debugging.

fn isProxy(&self) -> bool

where Self: Sized + Message,

Check whether the receiver is a subclass of the NSProxy root class instead of the usual NSObject.

fn retainCount(&self) -> usize

where Self: Sized + Message,

The reference count of the object.

impl PartialEq for VTTemporalNoiseFilterConfiguration

fn eq(&self, other: &Self) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl RefEncode for VTTemporalNoiseFilterConfiguration

const ENCODING_REF: Encoding = <NSObject as ::objc2::RefEncode>::ENCODING_REF

The Objective-C type-encoding for a reference of this type.

impl VTFrameProcessorConfiguration for VTTemporalNoiseFilterConfiguration

unsafe fn isSupported() -> bool

where Self: Sized + ClassType,

Available on crate features VTFrameProcessorConfiguration and objc2 only.

Returns a Boolean indicating whether the system supports this processor on the current configuration.

unsafe fn frameSupportedPixelFormats(&self) -> Retained<NSArray<NSNumber>>

where Self: Sized + Message,

Available on crate features VTFrameProcessorConfiguration and objc2 and objc2-foundation only.

List of supported pixel formats for source frames for the current configuration.

unsafe fn sourcePixelBufferAttributes( &self, ) -> Retained<NSDictionary<NSString, AnyObject>>

where Self: Sized + Message,

Available on crate features VTFrameProcessorConfiguration and objc2 and objc2-foundation only.

Pixel buffer attributes dictionary that describes requirements for pixel buffers which represent source frames and reference frames.

unsafe fn destinationPixelBufferAttributes( &self, ) -> Retained<NSDictionary<NSString, AnyObject>>

where Self: Sized + Message,

Available on crate features VTFrameProcessorConfiguration and objc2 and objc2-foundation only.

Pixel buffer attributes dictionary that describes requirements for pixel buffers which represent destination frames.

unsafe fn nextFrameCount(&self) -> NSInteger

where Self: Sized + Message,

Available on crate features VTFrameProcessorConfiguration and objc2 only.

Returns the number of “next” frames that this processor requires for processing.

unsafe fn previousFrameCount(&self) -> NSInteger

where Self: Sized + Message,

Available on crate features VTFrameProcessorConfiguration and objc2 only.

Returns the number of “previous” frames that this processor requires for processing.

unsafe fn maximumDimensions() -> CMVideoDimensions

where Self: Sized + ClassType,

Available on crate features VTFrameProcessorConfiguration and objc2 and objc2-core-media only.

Returns the maximum dimensions for a sourceFrame for the processor.

unsafe fn minimumDimensions() -> CMVideoDimensions

where Self: Sized + ClassType,

Available on crate features VTFrameProcessorConfiguration and objc2 and objc2-core-media only.

Returns the minimum dimensions for a sourceFrame for the processor.

impl DowncastTarget for VTTemporalNoiseFilterConfiguration

impl Eq for VTTemporalNoiseFilterConfiguration

impl Send for VTTemporalNoiseFilterConfiguration

impl Sync for VTTemporalNoiseFilterConfiguration