mirror of
https://github.com/VDR4Arch/vdr.git
synced 2023-10-10 13:36:52 +02:00
549 lines
21 KiB
C
549 lines
21 KiB
C
/*
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* pat.c: PAT section filter
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*
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* See the main source file 'vdr.c' for copyright information and
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* how to reach the author.
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*
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* $Id: pat.c 2.17 2012/03/02 10:56:45 kls Exp $
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*/
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#include "pat.h"
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#include <malloc.h>
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#include "channels.h"
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#include "libsi/section.h"
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#include "libsi/descriptor.h"
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#include "thread.h"
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#define PMT_SCAN_TIMEOUT 10 // seconds
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// --- cCaDescriptor ---------------------------------------------------------
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class cCaDescriptor : public cListObject {
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private:
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int caSystem;
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int esPid;
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int length;
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uchar *data;
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public:
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cCaDescriptor(int CaSystem, int CaPid, int EsPid, int Length, const uchar *Data);
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virtual ~cCaDescriptor();
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bool operator== (const cCaDescriptor &arg) const;
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int CaSystem(void) { return caSystem; }
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int EsPid(void) { return esPid; }
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int Length(void) const { return length; }
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const uchar *Data(void) const { return data; }
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};
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cCaDescriptor::cCaDescriptor(int CaSystem, int CaPid, int EsPid, int Length, const uchar *Data)
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{
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caSystem = CaSystem;
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esPid = EsPid;
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length = Length + 6;
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data = MALLOC(uchar, length);
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data[0] = SI::CaDescriptorTag;
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data[1] = length - 2;
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data[2] = (caSystem >> 8) & 0xFF;
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data[3] = caSystem & 0xFF;
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data[4] = ((CaPid >> 8) & 0x1F) | 0xE0;
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data[5] = CaPid & 0xFF;
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if (Length)
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memcpy(&data[6], Data, Length);
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}
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cCaDescriptor::~cCaDescriptor()
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{
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free(data);
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}
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bool cCaDescriptor::operator== (const cCaDescriptor &arg) const
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{
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return esPid == arg.esPid && length == arg.length && memcmp(data, arg.data, length) == 0;
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}
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// --- cCaDescriptors --------------------------------------------------------
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class cCaDescriptors : public cListObject {
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private:
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int source;
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int transponder;
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int serviceId;
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int numCaIds;
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int caIds[MAXCAIDS + 1];
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cList<cCaDescriptor> caDescriptors;
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void AddCaId(int CaId);
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public:
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cCaDescriptors(int Source, int Transponder, int ServiceId);
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bool operator== (const cCaDescriptors &arg) const;
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bool Is(int Source, int Transponder, int ServiceId);
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bool Is(cCaDescriptors * CaDescriptors);
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bool Empty(void) { return caDescriptors.Count() == 0; }
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void AddCaDescriptor(SI::CaDescriptor *d, int EsPid);
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int GetCaDescriptors(const int *CaSystemIds, int BufSize, uchar *Data, int EsPid);
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const int *CaIds(void) { return caIds; }
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};
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cCaDescriptors::cCaDescriptors(int Source, int Transponder, int ServiceId)
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{
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source = Source;
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transponder = Transponder;
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serviceId = ServiceId;
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numCaIds = 0;
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caIds[0] = 0;
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}
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bool cCaDescriptors::operator== (const cCaDescriptors &arg) const
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{
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cCaDescriptor *ca1 = caDescriptors.First();
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cCaDescriptor *ca2 = arg.caDescriptors.First();
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while (ca1 && ca2) {
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if (!(*ca1 == *ca2))
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return false;
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ca1 = caDescriptors.Next(ca1);
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ca2 = arg.caDescriptors.Next(ca2);
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}
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return !ca1 && !ca2;
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}
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bool cCaDescriptors::Is(int Source, int Transponder, int ServiceId)
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{
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return source == Source && transponder == Transponder && serviceId == ServiceId;
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}
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bool cCaDescriptors::Is(cCaDescriptors *CaDescriptors)
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{
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return Is(CaDescriptors->source, CaDescriptors->transponder, CaDescriptors->serviceId);
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}
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void cCaDescriptors::AddCaId(int CaId)
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{
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if (numCaIds < MAXCAIDS) {
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for (int i = 0; i < numCaIds; i++) {
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if (caIds[i] == CaId)
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return;
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}
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caIds[numCaIds++] = CaId;
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caIds[numCaIds] = 0;
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}
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}
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void cCaDescriptors::AddCaDescriptor(SI::CaDescriptor *d, int EsPid)
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{
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cCaDescriptor *nca = new cCaDescriptor(d->getCaType(), d->getCaPid(), EsPid, d->privateData.getLength(), d->privateData.getData());
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for (cCaDescriptor *ca = caDescriptors.First(); ca; ca = caDescriptors.Next(ca)) {
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if (*ca == *nca) {
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delete nca;
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return;
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}
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}
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AddCaId(nca->CaSystem());
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caDescriptors.Add(nca);
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//#define DEBUG_CA_DESCRIPTORS 1
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#ifdef DEBUG_CA_DESCRIPTORS
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char buffer[1024];
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char *q = buffer;
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q += sprintf(q, "CAM: %04X %5d %5d %04X %04X -", source, transponder, serviceId, d->getCaType(), EsPid);
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for (int i = 0; i < nca->Length(); i++)
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q += sprintf(q, " %02X", nca->Data()[i]);
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dsyslog("%s", buffer);
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#endif
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}
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// EsPid is to select the "type" of CaDescriptor to be returned
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// >0 - CaDescriptor for the particular esPid
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// =0 - common CaDescriptor
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// <0 - all CaDescriptors regardless of type (old default)
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int cCaDescriptors::GetCaDescriptors(const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
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{
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if (!CaSystemIds || !*CaSystemIds)
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return 0;
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if (BufSize > 0 && Data) {
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int length = 0;
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for (cCaDescriptor *d = caDescriptors.First(); d; d = caDescriptors.Next(d)) {
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if (EsPid < 0 || d->EsPid() == EsPid) {
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const int *caids = CaSystemIds;
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do {
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if (d->CaSystem() == *caids) {
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if (length + d->Length() <= BufSize) {
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memcpy(Data + length, d->Data(), d->Length());
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length += d->Length();
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}
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else
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return -1;
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}
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} while (*++caids);
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}
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}
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return length;
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}
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return -1;
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}
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// --- cCaDescriptorHandler --------------------------------------------------
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class cCaDescriptorHandler : public cList<cCaDescriptors> {
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private:
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cMutex mutex;
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public:
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int AddCaDescriptors(cCaDescriptors *CaDescriptors);
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// Returns 0 if this is an already known descriptor,
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// 1 if it is an all new descriptor with actual contents,
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// and 2 if an existing descriptor was changed.
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int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid);
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};
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int cCaDescriptorHandler::AddCaDescriptors(cCaDescriptors *CaDescriptors)
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{
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cMutexLock MutexLock(&mutex);
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for (cCaDescriptors *ca = First(); ca; ca = Next(ca)) {
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if (ca->Is(CaDescriptors)) {
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if (*ca == *CaDescriptors) {
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delete CaDescriptors;
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return 0;
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}
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Del(ca);
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Add(CaDescriptors);
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return 2;
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}
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}
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Add(CaDescriptors);
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return CaDescriptors->Empty() ? 0 : 1;
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}
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int cCaDescriptorHandler::GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
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{
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cMutexLock MutexLock(&mutex);
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for (cCaDescriptors *ca = First(); ca; ca = Next(ca)) {
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if (ca->Is(Source, Transponder, ServiceId))
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return ca->GetCaDescriptors(CaSystemIds, BufSize, Data, EsPid);
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}
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return 0;
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}
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cCaDescriptorHandler CaDescriptorHandler;
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int GetCaDescriptors(int Source, int Transponder, int ServiceId, const int *CaSystemIds, int BufSize, uchar *Data, int EsPid)
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{
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return CaDescriptorHandler.GetCaDescriptors(Source, Transponder, ServiceId, CaSystemIds, BufSize, Data, EsPid);
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}
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// --- cPatFilter ------------------------------------------------------------
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cPatFilter::cPatFilter(void)
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{
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pmtIndex = 0;
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pmtPid = 0;
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pmtSid = 0;
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lastPmtScan = 0;
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numPmtEntries = 0;
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Set(0x00, 0x00); // PAT
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}
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void cPatFilter::SetStatus(bool On)
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{
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cFilter::SetStatus(On);
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pmtIndex = 0;
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pmtPid = 0;
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pmtSid = 0;
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lastPmtScan = 0;
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numPmtEntries = 0;
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}
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void cPatFilter::Trigger(void)
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{
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numPmtEntries = 0;
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}
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bool cPatFilter::PmtVersionChanged(int PmtPid, int Sid, int Version)
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{
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uint64_t v = Version;
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v <<= 32;
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uint64_t id = (PmtPid | (Sid << 16)) & 0x00000000FFFFFFFFLL;
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for (int i = 0; i < numPmtEntries; i++) {
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if ((pmtVersion[i] & 0x00000000FFFFFFFFLL) == id) {
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bool Changed = (pmtVersion[i] & 0x000000FF00000000LL) != v;
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if (Changed)
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pmtVersion[i] = id | v;
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return Changed;
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}
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}
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if (numPmtEntries < MAXPMTENTRIES)
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pmtVersion[numPmtEntries++] = id | v;
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return true;
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}
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void cPatFilter::Process(u_short Pid, u_char Tid, const u_char *Data, int Length)
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{
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if (Pid == 0x00) {
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if (Tid == 0x00) {
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if (pmtPid && time(NULL) - lastPmtScan > PMT_SCAN_TIMEOUT) {
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Del(pmtPid, 0x02);
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pmtPid = 0;
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pmtIndex++;
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lastPmtScan = time(NULL);
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}
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if (!pmtPid) {
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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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int Index = 0;
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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 (Index++ >= pmtIndex && Channels.GetByServiceID(Source(), Transponder(), assoc.getServiceId())) {
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pmtPid = assoc.getPid();
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pmtSid = assoc.getServiceId();
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Add(pmtPid, 0x02);
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break;
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}
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}
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}
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if (!pmtPid)
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pmtIndex = 0;
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}
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}
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}
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else if (Pid == pmtPid && Tid == SI::TableIdPMT && Source() && Transponder()) {
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SI::PMT pmt(Data, false);
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if (!pmt.CheckCRCAndParse())
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return;
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if (pmt.getServiceId() != pmtSid)
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return; // skip broken PMT records
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if (!PmtVersionChanged(pmtPid, pmt.getTableIdExtension(), pmt.getVersionNumber())) {
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lastPmtScan = 0; // this triggers the next scan
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return;
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}
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if (!Channels.Lock(true, 10)) {
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numPmtEntries = 0; // to make sure we try again
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return;
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}
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cChannel *Channel = Channels.GetByServiceID(Source(), Transponder(), pmt.getServiceId());
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if (Channel) {
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SI::CaDescriptor *d;
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cCaDescriptors *CaDescriptors = new cCaDescriptors(Channel->Source(), Channel->Transponder(), Channel->Sid());
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// Scan the common loop:
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for (SI::Loop::Iterator it; (d = (SI::CaDescriptor*)pmt.commonDescriptors.getNext(it, SI::CaDescriptorTag)); ) {
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CaDescriptors->AddCaDescriptor(d, 0);
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delete d;
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}
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// Scan the stream-specific loop:
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SI::PMT::Stream stream;
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int Vpid = 0;
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int Ppid = 0;
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int Vtype = 0;
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int Apids[MAXAPIDS + 1] = { 0 }; // these lists are zero-terminated
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int Atypes[MAXAPIDS + 1] = { 0 };
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int Dpids[MAXDPIDS + 1] = { 0 };
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int Dtypes[MAXDPIDS + 1] = { 0 };
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int Spids[MAXSPIDS + 1] = { 0 };
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uchar SubtitlingTypes[MAXSPIDS + 1] = { 0 };
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uint16_t CompositionPageIds[MAXSPIDS + 1] = { 0 };
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uint16_t AncillaryPageIds[MAXSPIDS + 1] = { 0 };
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char ALangs[MAXAPIDS][MAXLANGCODE2] = { "" };
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char DLangs[MAXDPIDS][MAXLANGCODE2] = { "" };
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char SLangs[MAXSPIDS][MAXLANGCODE2] = { "" };
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int Tpid = 0;
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int NumApids = 0;
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int NumDpids = 0;
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int NumSpids = 0;
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for (SI::Loop::Iterator it; pmt.streamLoop.getNext(stream, it); ) {
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bool ProcessCaDescriptors = false;
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int esPid = stream.getPid();
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switch (stream.getStreamType()) {
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case 1: // STREAMTYPE_11172_VIDEO
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case 2: // STREAMTYPE_13818_VIDEO
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case 0x1B: // MPEG4
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Vpid = esPid;
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Ppid = pmt.getPCRPid();
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Vtype = stream.getStreamType();
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ProcessCaDescriptors = true;
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break;
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case 3: // STREAMTYPE_11172_AUDIO
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case 4: // STREAMTYPE_13818_AUDIO
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case 0x0F: // ISO/IEC 13818-7 Audio with ADTS transport syntax
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case 0x11: // ISO/IEC 14496-3 Audio with LATM transport syntax
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{
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if (NumApids < MAXAPIDS) {
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Apids[NumApids] = esPid;
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Atypes[NumApids] = stream.getStreamType();
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SI::Descriptor *d;
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for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
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switch (d->getDescriptorTag()) {
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case SI::ISO639LanguageDescriptorTag: {
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SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
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SI::ISO639LanguageDescriptor::Language l;
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char *s = ALangs[NumApids];
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int n = 0;
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for (SI::Loop::Iterator it; ld->languageLoop.getNext(l, it); ) {
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if (*ld->languageCode != '-') { // some use "---" to indicate "none"
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if (n > 0)
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*s++ = '+';
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strn0cpy(s, I18nNormalizeLanguageCode(l.languageCode), MAXLANGCODE1);
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s += strlen(s);
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if (n++ > 1)
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break;
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}
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}
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}
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break;
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default: ;
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}
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delete d;
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}
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NumApids++;
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}
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ProcessCaDescriptors = true;
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}
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break;
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case 5: // STREAMTYPE_13818_PRIVATE
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case 6: // STREAMTYPE_13818_PES_PRIVATE
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//XXX case 8: // STREAMTYPE_13818_DSMCC
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{
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int dpid = 0;
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int dtype = 0;
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char lang[MAXLANGCODE1] = { 0 };
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SI::Descriptor *d;
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for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
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switch (d->getDescriptorTag()) {
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case SI::AC3DescriptorTag:
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case SI::EnhancedAC3DescriptorTag:
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dpid = esPid;
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dtype = d->getDescriptorTag();
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ProcessCaDescriptors = true;
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break;
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case SI::SubtitlingDescriptorTag:
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if (NumSpids < MAXSPIDS) {
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Spids[NumSpids] = esPid;
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SI::SubtitlingDescriptor *sd = (SI::SubtitlingDescriptor *)d;
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SI::SubtitlingDescriptor::Subtitling sub;
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char *s = SLangs[NumSpids];
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int n = 0;
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for (SI::Loop::Iterator it; sd->subtitlingLoop.getNext(sub, it); ) {
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if (sub.languageCode[0]) {
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SubtitlingTypes[NumSpids] = sub.getSubtitlingType();
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CompositionPageIds[NumSpids] = sub.getCompositionPageId();
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AncillaryPageIds[NumSpids] = sub.getAncillaryPageId();
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if (n > 0)
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*s++ = '+';
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strn0cpy(s, I18nNormalizeLanguageCode(sub.languageCode), MAXLANGCODE1);
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s += strlen(s);
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if (n++ > 1)
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break;
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}
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}
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NumSpids++;
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}
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break;
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case SI::TeletextDescriptorTag:
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Tpid = esPid;
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break;
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case SI::ISO639LanguageDescriptorTag: {
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SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
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strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
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}
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break;
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default: ;
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}
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delete d;
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}
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if (dpid) {
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if (NumDpids < MAXDPIDS) {
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Dpids[NumDpids] = dpid;
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Dtypes[NumDpids] = dtype;
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strn0cpy(DLangs[NumDpids], lang, MAXLANGCODE1);
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NumDpids++;
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}
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}
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}
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break;
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case 0x80: // STREAMTYPE_USER_PRIVATE - DigiCipher II VIDEO (ANSI/SCTE 57)
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Vpid = esPid;
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Ppid = pmt.getPCRPid();
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Vtype = 0x02; // compression based upon MPEG-2
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ProcessCaDescriptors = true;
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break;
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case 0x81: // STREAMTYPE_USER_PRIVATE - ATSC A/53 AUDIO (ANSI/SCTE 57)
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{
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char lang[MAXLANGCODE1] = { 0 };
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SI::Descriptor *d;
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for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
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switch (d->getDescriptorTag()) {
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case SI::ISO639LanguageDescriptorTag: {
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SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
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strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
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}
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break;
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default: ;
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}
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delete d;
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}
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if (NumDpids < MAXDPIDS) {
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Dpids[NumDpids] = esPid;
|
|
Dtypes[NumDpids] = SI::AC3DescriptorTag;
|
|
strn0cpy(DLangs[NumDpids], lang, MAXLANGCODE1);
|
|
NumDpids++;
|
|
}
|
|
ProcessCaDescriptors = true;
|
|
}
|
|
break;
|
|
case 0x82 ... 0xFF: // STREAMTYPE_USER_PRIVATE
|
|
{
|
|
char lang[MAXLANGCODE1] = { 0 };
|
|
bool IsAc3 = false;
|
|
SI::Descriptor *d;
|
|
for (SI::Loop::Iterator it; (d = stream.streamDescriptors.getNext(it)); ) {
|
|
switch (d->getDescriptorTag()) {
|
|
case SI::RegistrationDescriptorTag: {
|
|
SI::RegistrationDescriptor *rd = (SI::RegistrationDescriptor *)d;
|
|
// http://www.smpte-ra.org/mpegreg/mpegreg.html
|
|
switch (rd->getFormatIdentifier()) {
|
|
case 0x41432D33: // 'AC-3'
|
|
IsAc3 = true;
|
|
break;
|
|
default:
|
|
//printf("Format identifier: 0x%08X (pid: %d)\n", rd->getFormatIdentifier(), esPid);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
case SI::ISO639LanguageDescriptorTag: {
|
|
SI::ISO639LanguageDescriptor *ld = (SI::ISO639LanguageDescriptor *)d;
|
|
strn0cpy(lang, I18nNormalizeLanguageCode(ld->languageCode), MAXLANGCODE1);
|
|
}
|
|
break;
|
|
default: ;
|
|
}
|
|
delete d;
|
|
}
|
|
if (IsAc3) {
|
|
if (NumDpids < MAXDPIDS) {
|
|
Dpids[NumDpids] = esPid;
|
|
Dtypes[NumDpids] = SI::AC3DescriptorTag;
|
|
strn0cpy(DLangs[NumDpids], lang, MAXLANGCODE1);
|
|
NumDpids++;
|
|
}
|
|
ProcessCaDescriptors = true;
|
|
}
|
|
}
|
|
break;
|
|
default: ;//printf("PID: %5d %5d %2d %3d %3d\n", pmt.getServiceId(), stream.getPid(), stream.getStreamType(), pmt.getVersionNumber(), Channel->Number());
|
|
}
|
|
if (ProcessCaDescriptors) {
|
|
for (SI::Loop::Iterator it; (d = (SI::CaDescriptor*)stream.streamDescriptors.getNext(it, SI::CaDescriptorTag)); ) {
|
|
CaDescriptors->AddCaDescriptor(d, esPid);
|
|
delete d;
|
|
}
|
|
}
|
|
}
|
|
if (Setup.UpdateChannels >= 2) {
|
|
Channel->SetPids(Vpid, Ppid, Vtype, Apids, Atypes, ALangs, Dpids, Dtypes, DLangs, Spids, SLangs, Tpid);
|
|
Channel->SetCaIds(CaDescriptors->CaIds());
|
|
Channel->SetSubtitlingDescriptors(SubtitlingTypes, CompositionPageIds, AncillaryPageIds);
|
|
}
|
|
Channel->SetCaDescriptors(CaDescriptorHandler.AddCaDescriptors(CaDescriptors));
|
|
}
|
|
lastPmtScan = 0; // this triggers the next scan
|
|
Channels.Unlock();
|
|
}
|
|
}
|