TS_PACKET_SZ
#define PT3_ACCESS_UNIT (TS_PACKET_SZ * 128)
(DATA_BUF_SZ - adap->buf_ofs) / TS_PACKET_SZ);
adap->buffer[idx].data, ofs / TS_PACKET_SZ);
PT3_ACCESS_UNIT / TS_PACKET_SZ);