Type Alias VTCompressionOutputCallback 

pub type VTCompressionOutputCallback = Option<unsafe extern "C-unwind" fn(*mut c_void, *mut c_void, i32, VTEncodeInfoFlags, *mut CMSampleBuffer)>;

Available on crate features VTCompressionSession and VTErrors and objc2-core-media only.

Prototype for callback invoked when frame compression is complete.

When you create a compression session, you pass in a callback function to be called for compressed frames. This function will be called in decode order (which is not necessarily the same as display order).

Parameter outputCallbackRefCon: The callback’s reference value.

Parameter sourceFrameRefCon: The frame’s reference value, copied from the sourceFrameRefCon argument to VTCompressionSessionEncodeFrame.

Parameter status: noErr if compression was successful; an error code if compression was not successful.

Parameter infoFlags: Contains information about the encode operation. The kVTEncodeInfo_Asynchronous bit may be set if the encode ran asynchronously. The kVTEncodeInfo_FrameDropped bit may be set if the frame was dropped.

Parameter sampleBuffer: Contains the compressed frame, if compression was successful and the frame was not dropped; otherwise, NULL.

See also Apple’s documentation

Aliased Type

pub enum VTCompressionOutputCallback {
    None,
    Some(unsafe extern "C-unwind" fn(*mut c_void, *mut c_void, i32, VTEncodeInfoFlags, *mut CMSampleBuffer)),
}

Variants

None

No value.

Some(unsafe extern "C-unwind" fn(*mut c_void, *mut c_void, i32, VTEncodeInfoFlags, *mut CMSampleBuffer))

Some value of type T.