Function get_sbits64

libavcodec/get_bits.h:486–493

* Read 0-64 bits as a signed integer. */

 * Read 0-64 bits as a signed integer.
 */
static inline int64_t get_sbits64(GetBitContext *s, int n)
{
    // sign_extend(x, 0) is undefined
    if (!n)
        return 0;

    return sign_extend64(get_bits64(s, n), n);
}

/**
 * Show 0-32 bits.