EMDTV_CIR_BUFLEN
pos = (sc->sc_ir_ptr + sc->sc_ir_cnt) % EMDTV_CIR_BUFLEN;
if (sc->sc_ir_cnt < EMDTV_CIR_BUFLEN - 1) {
sc->sc_ir_ptr = EMDTV_CIR_BUFLEN - 1;
if (sc->sc_ir_ptr == EMDTV_CIR_BUFLEN)
uint8_t sc_ir_queue[EMDTV_CIR_BUFLEN][3];