Struct CMBufferHandlers 

#[repr(C)]
pub struct CMBufferHandlers {
    pub version: usize,
    pub getDecodeTimeStamp: CMBufferGetTimeHandler,
    pub getPresentationTimeStamp: CMBufferGetTimeHandler,
    pub getDuration: CMBufferGetTimeHandler,
    pub isDataReady: CMBufferGetBooleanHandler,
    pub compare: CMBufferCompareHandler,
    pub dataBecameReadyNotification: *const CFString,
    pub getSize: CMBufferGetSizeHandler,
}

Available on crate features CMBufferQueue and CMTime and block2 only.

Apple’s documentation

Fields

version: usize

Must be 1.

getDecodeTimeStamp: CMBufferGetTimeHandler

This block is called from CMBufferQueueGetFirstDecodeTimeStamp (once), and from CMBufferQueueGetMinDecodeTimeStamp (multiple times). It should return the decode timestamp of the buffer. If there are multiple samples in the buffer, this block should return the minimum decode timestamp in the buffer. Can be NULL (CMBufferQueueGetFirstDecodeTimeStamp and CMBufferQueueGetMinDecodeTimeStamp will return kCMTimeInvalid).

getPresentationTimeStamp: CMBufferGetTimeHandler

This block is called from CMBufferQueueGetFirstPresentationTimeStamp (once) and from CMBufferQueueGetMinPresentationTimeStamp (multiple times). It should return the presentation timestamp of the buffer. If there are multiple samples in the buffer, this block should return the minimum presentation timestamp in the buffer. Can be NULL (CMBufferQueueGetFirstPresentationTimeStamp and CMBufferQueueGetMinPresentationTimeStamp will return kCMTimeInvalid).

getDuration: CMBufferGetTimeHandler

This block is called (once) during enqueue and dequeue operations to update the total duration of the queue. Must not be NULL.

isDataReady: CMBufferGetBooleanHandler

This block is called from CMBufferQueueDequeueIfDataReadyAndRetain, to ask if the buffer that is about to be dequeued is ready. Can be NULL (data will be assumed to be ready).

compare: CMBufferCompareHandler

This block is called (multiple times) from CMBufferQueueEnqueue, to perform an insertion sort. Can be NULL (queue will be FIFO).

dataBecameReadyNotification: *const CFString

If triggers of type kCMBufferQueueTrigger_WhenDataBecomesReady are installed, the queue will listen for this notification on the head buffer. Can be NULL (then the queue won’t listen for it).

getSize: CMBufferGetSizeHandler

This block is called (once) during enqueue and dequeue operation to update the total size of the queue. Can be NULL.

Trait Implementations

impl Clone for CMBufferHandlers

fn clone(&self) -> CMBufferHandlers

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CMBufferHandlers

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

Formats the value using the given formatter.

impl Encode for CMBufferHandlers

Available on crate feature objc2 only.

const ENCODING: Encoding

The Objective-C type-encoding for this type.

impl PartialEq for CMBufferHandlers

fn eq(&self, other: &CMBufferHandlers) -> 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 CMBufferHandlers

Available on crate feature objc2 only.

const ENCODING_REF: Encoding

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

impl Copy for CMBufferHandlers

impl StructuralPartialEq for CMBufferHandlers