102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/*
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* sidscanner.c: IPTV plugin for the Video Disk Recorder
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*
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* See the README file for copyright information and how to reach the author.
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*
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*/
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#include <libsi/section.h>
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#include "common.h"
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#include "sidscanner.h"
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cSidScanner::cSidScanner(void)
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: channelId(tChannelID::InvalidID),
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sidFound(false),
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nidFound(false),
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tidFound(false)
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{
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debug("cSidScanner::cSidScanner()\n");
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Set(0x00, 0x00); // PAT
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Set(0x10, 0x40); // NIT
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}
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cSidScanner::~cSidScanner()
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{
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debug("cSidScanner::~cSidScanner()\n");
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}
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void cSidScanner::SetStatus(bool On)
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{
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debug("cSidScanner::SetStatus(): %d\n", On);
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cFilter::SetStatus(On);
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}
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void cSidScanner::SetChannel(const tChannelID &ChannelId)
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{
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debug("cSidScanner::SetChannel(): %s\n", *ChannelId.ToString());
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channelId = ChannelId;
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sidFound = false;
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nidFound = false;
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tidFound = false;
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}
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void cSidScanner::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
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{
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int newSid = -1, newNid = -1, newTid = -1;
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//debug("cSidScanner::Process()\n");
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if (channelId.Valid()) {
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if ((Pid == 0x00) && (Tid == 0x00)) {
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debug("cSidScanner::Process(): Pid=%d Tid=%02X\n", Pid, Tid);
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SI::PAT pat(Data, false);
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if (!pat.CheckCRCAndParse())
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return;
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SI::PAT::Association assoc;
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for (SI::Loop::Iterator it; pat.associationLoop.getNext(assoc, it); ) {
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if (!assoc.isNITPid()) {
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if (assoc.getServiceId() != channelId.Sid()) {
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debug("cSidScanner::Process(): Sid=%d\n", assoc.getServiceId());
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newSid = assoc.getServiceId();
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}
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sidFound = true;
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break;
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}
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}
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}
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else if ((Pid == 0x10) && (Tid == 0x40)) {
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debug("cSidScanner::Process(): Pid=%d Tid=%02X\n", Pid, Tid);
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SI::NIT nit(Data, false);
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if (!nit.CheckCRCAndParse())
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return;
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SI::NIT::TransportStream ts;
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for (SI::Loop::Iterator it; nit.transportStreamLoop.getNext(ts, it); ) {
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if (ts.getTransportStreamId() != channelId.Tid()) {
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debug("cSidScanner::Process(): TSid=%d\n", ts.getTransportStreamId());
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newTid = ts.getTransportStreamId();
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}
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tidFound = true;
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break; // default to the first one
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}
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if (nit.getNetworkId() != channelId.Nid()) {
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debug("cSidScanner::Process(): Nid=%d\n", ts.getTransportStreamId());
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newNid = nit.getNetworkId();
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}
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nidFound = true;
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}
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}
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if ((newSid >= 0) || (newNid >= 0) || (newTid >= 0)) {
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if (!Channels.Lock(true, 10))
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return;
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cChannel *IptvChannel = Channels.GetByChannelID(channelId);
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if (IptvChannel)
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IptvChannel->SetId((newNid < 0) ? IptvChannel->Nid() : newNid, (newTid < 0) ? IptvChannel->Tid() : newTid,
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(newSid < 0) ? IptvChannel->Sid() : newSid, IptvChannel->Rid());
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Channels.Unlock();
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}
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if (sidFound && nidFound && tidFound) {
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SetChannel(tChannelID::InvalidID);
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SetStatus(false);
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}
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}
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