filter.h

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/*
 * filter.h: Section filter
 *
 * See the main source file 'vdr.c' for copyright information and
 * how to reach the author.
 *
 * $Id: filter.h 5.1 2021/03/16 15:10:54 kls Exp $
 */
 
#ifndef __FILTER_H
#define __FILTER_H
 
#include <sys/types.h>
#include "tools.h"
 
#define DEPRECATED_SECTIONSYNCER_SYNC_REPEAT 1
 
class cSectionSyncer {
private:
  int currentVersion;
  int currentSection;
  bool random;
  bool synced;
  bool complete;
  uint32_t segments;  // bit flags for the 32 segments
  uchar sections[32]; // holds 32 * 8 = 256 bits, as flags for the sections
  void SetSectionFlag(uchar Section, bool On) { if (On) sections[Section / 8] |= (1 << (Section % 8)); else sections[Section / 8] &= ~(1 << (Section % 8)); }
  bool GetSectionFlag(uchar Section) { return sections[Section / 8] & (1 << (Section % 8)); }
public:
  cSectionSyncer(bool Random = false);
  void Reset(void);
  bool Check(uchar Version, int SectionNumber);
  bool Processed(int SectionNumber, int LastSectionNumber, int SegmentLastSectionNumber = -1);
  bool Complete(void) { return complete; }
#if DEPRECATED_SECTIONSYNCER_SYNC_REPEAT
  void Repeat(void);
  bool Sync(uchar Version, int Number, int LastNumber);
#endif
  };
 
class cSectionSyncerRandom : public cSectionSyncer {
public:
  cSectionSyncerRandom(void): cSectionSyncer(true) {}
  };
 
class cFilterData : public cListObject {
public:
  u_short pid;
  u_char tid;
  u_char mask;
  bool sticky;
  cFilterData(void);
  cFilterData(u_short Pid, u_char Tid, u_char Mask, bool Sticky);
  cFilterData& operator= (const cFilterData &FilterData);
  bool Is(u_short Pid, u_char Tid, u_char Mask);
  bool Matches(u_short Pid, u_char Tid);
  };
 
class cChannel;
class cSectionHandler;
 
class cFilter : public cListObject {
  friend class cSectionHandler;
private:
  cSectionHandler *sectionHandler;
  cList<cFilterData> data;
  bool on;
protected:
  cFilter(void);
  cFilter(u_short Pid, u_char Tid, u_char Mask = 0xFF);
  virtual ~cFilter();
  virtual void SetStatus(bool On);
  virtual void Process(u_short Pid, u_char Tid, const u_char *Data, int Length) = 0;
  int Source(void);
  int Transponder(void);
  const cChannel *Channel(void);
  bool Matches(u_short Pid, u_char Tid);
  void Set(u_short Pid, u_char Tid, u_char Mask = 0xFF);
  void Add(u_short Pid, u_char Tid, u_char Mask = 0xFF, bool Sticky = false);
  void Del(u_short Pid, u_char Tid, u_char Mask = 0xFF);
  };
 
#endif //__FILTER_H