sdt.h

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/*
 * sdt.h: SDT section filter
 *
 * See the main source file 'vdr.c' for copyright information and
 * how to reach the author.
 *
 * $Id: sdt.h 5.1 2025/03/02 11:03:35 kls Exp $
 */
 
#ifndef __SDT_H
#define __SDT_H
 
#include <atomic>
#include "filter.h"
#include "pat.h"
 
class cSdtFilter : public cFilter {
private:
  enum eTransponderState { tsUnknown, tsWrong, tsAccepted, tsVerified };
  cMutex mutex;
  cSectionSyncer sectionSyncer;
  int source;
  int lastSource;
  int lastTransponder;
  int lastNid;
  int lastTid;
  cPatFilter *patFilter;
  std::atomic<eTransponderState> transponderState; // set by the section handler thread, read by the tuner thread
protected:
  virtual void Process(u_short Pid, u_char Tid, const u_char *Data, int Length) override;
public:
  cSdtFilter(cPatFilter *PatFilter);
  virtual void SetStatus(bool On) override;
  void Trigger(int Source);
  bool TransponderVerified(void) const { return transponderState == tsVerified; } // returns true if the expected NIT/TID have been received in the SDT
  bool TransponderWrong(void) const { return transponderState == tsWrong; } // returns true if an expected change of NIT/TID has not happened
  };
 
#endif //__SDT_H