函数 av_camellia_init 

pub unsafe extern "C" fn av_camellia_init(
    ctx: *mut AVCAMELLIA,
    key: *const u8,
    key_bits: c_int,
) -> c_int

Initialize an AVCAMELLIA context.

@param ctx an AVCAMELLIA context @param key a key of 16, 24, 32 bytes used for encryption/decryption @param key_bits number of keybits: possible are 128, 192, 256