IPR_MICBUFHALFFULL
epcm->capture_ipr = IPR_MICBUFFULL|IPR_MICBUFHALFFULL;
if (status & IPR_MICBUFHALFFULL) {
if (status & (IPR_MICBUFFULL|IPR_MICBUFHALFFULL)) {
status &= ~(IPR_MICBUFFULL|IPR_MICBUFHALFFULL);