/**
* Continue processing of transport stream packets
*/
static void
ts_recv_packet0
(mpegts_service_t *t, elementary_stream_t *st, const uint8_t *tsb)
{
int off, pusi, cc, error;
service_set_streaming_status_flags((service_t*)t, TSS_MUX_PACKETS);
if(streaming_pad_probe_type(&t->s_streaming_pad, SMT_MPEGTS))
ts_remux(t, tsb);
if (!st)
return;
error = !!(tsb[1] & 0x80);
pusi = !!(tsb[1] & 0x40);
/* Check CC */
if(tsb[3] & 0x10) {
cc = tsb[3] & 0xf;
if(st->es_cc != -1 && cc != st->es_cc) {
/* Let the hardware to stabilize and don't flood the log */
if (t->s_start_time + 1 < dispatch_clock &&
tvhlog_limit(&st->es_cc_log, 10))
tvhwarn("TS", "%s Continuity counter error (total %zi)",
service_component_nicename(st), st->es_cc_log.count);
avgstat_add(&t->s_cc_errors, 1, dispatch_clock);
avgstat_add(&st->es_cc_errors, 1, dispatch_clock);
// Mark as error if this is not the first packet of a payload
if(!pusi)
error |= 0x2;
}
st->es_cc = (cc + 1) & 0xf;
}
off = tsb[3] & 0x20 ? tsb[4] + 5 : 4;
switch(st->es_type) {
case SCT_CA:
break;
default:
if(!streaming_pad_probe_type(&t->s_streaming_pad, SMT_PACKET))
break;
if(st->es_type == SCT_TELETEXT)
teletext_input(t, st, tsb);
if(off > 188)
break;
if(t->s_status == SERVICE_RUNNING)
parse_mpeg_ts((service_t*)t, st, tsb + off, 188 - off, pusi, error);
break;
}
}
static void
tvhcsa_csa_cbc_descramble
( tvhcsa_t *csa, struct mpegts_service *s, const uint8_t *tsb, int tsb_len )
{
const uint8_t *tsb_end = tsb + tsb_len;
assert(csa->csa_fill >= 0 && csa->csa_fill < csa->csa_fill_size);
#if ENABLE_DVBCSA
uint8_t *pkt;
int_fast8_t ev_od;
int_fast16_t len;
int_fast16_t offset;
for ( ; tsb < tsb_end; tsb += 188) {
pkt = csa->csa_tsbcluster + csa->csa_fill * 188;
memcpy(pkt, tsb, 188);
csa->csa_fill++;
do { // handle this packet
if((pkt[3] & 0x80) == 0) // clear or reserved (0x40)
break;
ev_od = pkt[3] & 0x40;
pkt[3] &= 0x3f; // consider it decrypted now
if(pkt[3] & 0x20) { // incomplete packet
if(!(pkt[3] & 0x10)) // no payload - but why scrambled???
break;
offset = 4 + pkt[4] + 1;
if (offset >= 188){ // invalid offset (residue handling?)
if (tvhlog_limit(&csa->tvhcsa_loglimit, 30))
tvhtrace(LS_CSA, "invalid payload offset in packet for service \"%s\" (offset=%d pkt[3]=0x%02x pkt[4]=0x%02x)",
((mpegts_service_t *)s)->s_dvb_svcname, (int)offset, pkt[3], pkt[4]);
break; // no more processing
}
len = 188 - offset;
} else {
len = 184;
offset = 4;
}
if(ev_od == 0) {
csa->csa_tsbbatch_even[csa->csa_fill_even].data = pkt + offset;
csa->csa_tsbbatch_even[csa->csa_fill_even].len = len;
csa->csa_fill_even++;
if(csa->csa_fill_even == csa->csa_cluster_size)
tvhcsa_csa_cbc_flush(csa, s);
} else {
csa->csa_tsbbatch_odd[csa->csa_fill_odd].data = pkt + offset;
csa->csa_tsbbatch_odd[csa->csa_fill_odd].len = len;
csa->csa_fill_odd++;
if(csa->csa_fill_odd == csa->csa_cluster_size)
tvhcsa_csa_cbc_flush(csa, s);
}
} while(0);
if(csa->csa_fill == csa->csa_fill_size )
tvhcsa_csa_cbc_flush(csa, s);
}
#else
#error "Unknown CSA descrambler"
#endif
}