Function speex_bits_unpack_signed 

pub unsafe extern "C" fn speex_bits_unpack_signed(
    bits: *mut SpeexBits,
    nbBits: c_int,
) -> c_int

Interpret the next bits in the bit-stream as a signed integer

@param bits Bit-stream to operate on @param nbBits Number of bits to interpret @return A signed integer represented by the bits read