Function rsmpeg::ffi::av_memcpy_backptr [−][src]
pub unsafe extern "C" fn av_memcpy_backptr(dst: *mut u8, back: i32, cnt: i32)
Expand description
Overlapping memcpy() implementation.
@param dst Destination buffer @param back Number of bytes back to start copying (i.e. the initial size of the overlapping window); must be > 0 @param cnt Number of bytes to copy; must be >= 0
@note cnt > back
is valid, this will copy the bytes we just copied,
thus creating a repeating pattern with a period length of back
.