IPACKS
av7110->iobuf = vmalloc(AVOUTLEN + AOUTLEN + BMPLEN + 4 * IPACKS);
ret = av7110_ipack_init(ipack, IPACKS, play[i]);
av7110->kbuf[1] = av7110->kbuf[0] + 2 * IPACKS;
if (n > IPACKS * 2)
n = IPACKS * 2;
if (n > IPACKS * 2)
n = IPACKS * 2;
if (n > IPACKS * 2)
n = IPACKS * 2;
#ifndef IPACKS