Struct VTCompressionSession

#[repr(C)]
pub struct VTCompressionSession { /* private fields */ }

Available on crate feature VTCompressionSession only.

A reference to a Video Toolbox Compression Session.

A compression session supports the compression of a sequence of video frames. The session reference is a reference-counted CF object. To create a compression session, call VTCompressionSessionCreate; then you can optionally configure the session using VTSessionSetProperty; then to encode frames, call VTCompressionSessionEncodeFrame. To force completion of some or all pending frames, call VTCompressionSessionCompleteFrames. When you are done with the session, you should call VTCompressionSessionInvalidate to tear it down and CFRelease to release your object reference.

See also Apple’s documentation

Methods from Deref<Target = CFType>

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

where T: ConcreteType,

Available on crate feature VTSession only.

Attempt to downcast the type to that of type T.

This is the reference-variant. Use CFRetained::downcast if you want to convert a retained type. See also ConcreteType for more details on which types support being converted to.

Trait Implementations

impl AsRef<AnyObject> for VTCompressionSession

fn as_ref(&self) -> &AnyObject

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

impl AsRef<CFType> for VTCompressionSession

fn as_ref(&self) -> &CFType

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

impl AsRef<VTCompressionSession> for VTCompressionSession

fn as_ref(&self) -> &Self

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

impl Borrow<AnyObject> for VTCompressionSession

fn borrow(&self) -> &AnyObject

Immutably borrows from an owned value.

impl Borrow<CFType> for VTCompressionSession

fn borrow(&self) -> &CFType

Immutably borrows from an owned value.

impl ConcreteType for VTCompressionSession

fn type_id() -> CFTypeID

Returns the CFTypeID for compression sessions.

impl Debug for VTCompressionSession

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

Formats the value using the given formatter.

impl Deref for VTCompressionSession

type Target = CFType

The resulting type after dereferencing.

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

Dereferences the value.

impl Hash for VTCompressionSession

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 VTCompressionSession

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

where Self: Sized,

Increment the reference count of the receiver.

impl PartialEq for VTCompressionSession

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 VTCompressionSession

const ENCODING_REF: Encoding

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

impl Type for VTCompressionSession

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

where Self: Sized,

Increment the reference count of the receiver.

impl Eq for VTCompressionSession