···16161717let config ?(block_size = 16) ?(bits_per_sample = 16) ?rsi () =
1818 if block_size < 8 || block_size > 64 then
1919- invalid_arg (Fmt.str "block_size must be in 8..64, got %d" block_size);
1919+ Fmt.invalid_arg "block_size must be in 8..64, got %d" block_size);
2020 if bits_per_sample < 1 || bits_per_sample > 32 then
2121 invalid_arg
2222 (Fmt.str "bits_per_sample must be in 1..32, got %d" bits_per_sample);