kdu_sample_allocator::pre_alloc

Reserves enough storage for num_requests later calls to alloc16 (if use_shorts is true) or alloc32 (if use_shorts is false). Space is reserved such that each of these num_requests allocations can return an appropriately aligned pointer to an array which offers entries at locations n in the range - before <= n < after, where each entry is of type kdu_sample16 (if use_shorts=true) or kdu_sample32 (if use_shorts=false).

use_shorts [bool]

before [int]

after [int]

num_requests [int]