int i, len, val;
int i, len, val = 0;
static int get_bi(ByteIOContext *bc){   int i, len, val;        len = get_v(bc);    if(len > 4) return -1;        val = 0;    for (i = 0; i < len; i++) {        val |= get_byte(bc) << (i * 8);    }    return val;}