MCE_PACKET_SIZE
#define MCE_IRDATA_HEADER (0x80 + MCE_PACKET_SIZE - 1)
if (ircount % MCE_PACKET_SIZE == 0) {
length = ircount % MCE_PACKET_SIZE;
MCE_PACKET_SIZE - length;
length = ircount % MCE_PACKET_SIZE;
irbuf[ircount - length] -= MCE_PACKET_SIZE - length;