pub unsafe extern "C" fn CMSampleBufferCallForEachSample(
sbuf: CMSampleBufferRef,
callback: Option<unsafe extern "C" fn(sampleBuffer: CMSampleBufferRef, index: CMItemCount, refcon: *mut c_void) -> OSStatus>,
refcon: *mut c_void,
) -> OSStatusExpand description
Apple SDK function CMSampleBufferCallForEachSample.