aec_encode can be used in a streaming fashion by chunking input and
output and specifying AEC_NO_FLUSH. The function will return if either
the input runs empty or the output buffer is full. The calling
-function can check avail_in and avail_out to see what occcurred. The
+function can check avail_in and avail_out to see what occurred. The
last call to aec_encode() must set AEC_FLUSH to drain all
output. aec.c is an example of streaming usage of encoding and
decoding.