MAESTRO_RECBUF_L_OFF
MAESTRO_RECBUF_L_OFF + offset / 2);
ess->rch.base = DMAADDR(p) + MAESTRO_RECBUF_L_OFF;
choffset = MAESTRO_RECBUF_L_OFF;
#define MAESTRO_RECBUF_R_OFF (MAESTRO_RECBUF_L_OFF + MAESTRO_RECBUF_L_SZ)