Function get_bits_long

libavcodec/get_bits.h:424–451

* Read 0-32 bits. */

 * Read 0-32 bits.
 */
static inline unsigned int get_bits_long(GetBitContext *s, int n)
{
    av_assert2(n>=0 && n<=32);
    if (!n) {
        return 0;
    } else if ((!HAVE_FAST_64BIT || av_builtin_constant_p(n <= MIN_CACHE_BITS))
               && n <= MIN_CACHE_BITS) {
        return get_bits(s, n);
    } else {
#if HAVE_FAST_64BIT
        unsigned tmp;
        OPEN_READER(re, s);
        UPDATE_CACHE_32(re, s);
        tmp = SHOW_UBITS(re, s, n);
        LAST_SKIP_BITS(re, s, n);
        CLOSE_READER(re, s);
        return tmp;
#else
#ifdef BITSTREAM_READER_LE
        unsigned ret = get_bits(s, 16);
        return ret | (get_bits(s, n - 16) << 16);
#else
        unsigned ret = get_bits(s, 16) << (n - 16);
        return ret | get_bits(s, n - 16);
#endif
#endif
    }
}

/**
 * Read 0-64 bits.