/* * tvheadend, MPEG transport stream functions * Copyright (C) 2007 Andreas Öman * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "tvhead.h" #include "dispatch.h" #include "dvb_dvr.h" #include "teletext.h" #include "transports.h" #include "subscriptions.h" #include "v4l.h" #include "dvb_dvr.h" #include "iptv_input.h" #include "psi.h" /* * Process transport stream packets */ void ts_recv_tsb(th_transport_t *t, int pid, uint8_t *tsb, int scanpcr, int64_t pcr) { th_pid_t *pi = NULL; th_subscription_t *s; int cc, err = 0, afc, afl = 0; int len, pusi; LIST_FOREACH(pi, &t->tht_pids, tp_link) if(pi->tp_pid == pid) break; if(pi == NULL) return; avgstat_add(&t->tht_rate, 188, dispatch_clock); afc = (tsb[3] >> 4) & 3; if(afc & 1) { cc = tsb[3] & 0xf; if(pi->tp_cc_valid && cc != pi->tp_cc) { /* Incorrect CC */ avgstat_add(&t->tht_cc_errors, 1, dispatch_clock); err = 1; } pi->tp_cc_valid = 1; pi->tp_cc = (cc + 1) & 0xf; } if(afc & 2) { afl = tsb[4] + 1; if(afl > 0 && scanpcr && tsb[5] & 0x10) { pcr = (uint64_t)tsb[6] << 25; pcr |= (uint64_t)tsb[7] << 17; pcr |= (uint64_t)tsb[8] << 9; pcr |= (uint64_t)tsb[9] << 1; pcr |= (uint64_t)(tsb[10] >> 7) & 0x01; } } switch(pi->tp_type) { case HTSTV_TABLE: if(pi->tp_section == NULL) pi->tp_section = calloc(1, sizeof(struct psi_section)); afl += 4; if(err || afl >= 188) { pi->tp_section->ps_offset = -1; /* hold parser until next pusi */ break; } pusi = tsb[1] & 0x40; if(pusi) { len = tsb[afl++]; if(len > 0) { if(len > 188 - afl) break; if(!psi_section_reassemble(pi->tp_section, tsb + afl, len, 0, 1)) pi->tp_got_section(t, pi, pi->tp_section->ps_data, pi->tp_section->ps_offset); afl += len; } } if(!psi_section_reassemble(pi->tp_section, tsb + afl, 188 - afl, pusi, 1)) pi->tp_got_section(t, pi, pi->tp_section->ps_data, pi->tp_section->ps_offset); break; case HTSTV_TELETEXT: teletext_input(t, tsb); break; default: LIST_FOREACH(s, &t->tht_subscriptions, ths_transport_link) { s->ths_total_err += err; s->ths_callback(s, tsb, pi, pcr); } break; } } /* * */ th_pid_t * ts_add_pid(th_transport_t *t, uint16_t pid, tv_streamtype_t type) { th_pid_t *pi; int i = 0; LIST_FOREACH(pi, &t->tht_pids, tp_link) { i++; if(pi->tp_pid == pid) return pi; } pi = calloc(1, sizeof(th_pid_t)); pi->tp_index = i; pi->tp_pid = pid; pi->tp_type = type; pi->tp_demuxer_fd = -1; LIST_INSERT_HEAD(&t->tht_pids, pi, tp_link); return pi; }