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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 4.2 2015/07/25 10:03:44 kls Exp $
*/
#ifndef __FILTER_H
#define __FILTER_H
#include <sys/types.h>
#include "tools.h"
class cSectionSyncer {
private:
int currentVersion;
int currentSection;
bool synced;
bool complete;
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(void);
void Reset(void);
void Repeat(void);
bool Complete(void) { return complete; }
bool Sync(uchar Version, int Number, int LastNumber);
};
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);
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);
///< Turns this filter on or off, depending on the value of On.
///< If the filter is turned off, any filter data that has been
///< added without the Sticky parameter set to 'true' will be
///< automatically deleted. Those parameters that have been added
///< with Sticky set to 'true' will be automatically reused when
///< SetStatus(true) is called.
virtual void Process(u_short Pid, u_char Tid, const u_char *Data, int Length) = 0;
///< Processes the data delivered to this filter.
///< Pid and Tid is one of the combinations added to this filter by
///< a previous call to Add(), Data is a pointer to Length bytes of
///< data. This function will be called from the section handler's
///< thread, so it has to use proper locking mechanisms in case it
///< accesses any global data. It is guaranteed that if several cFilters
///< are attached to the same cSectionHandler, only _one_ of them has
///< its Process() function called at any given time. It is allowed
///< that more than one cFilter are set up to receive the same Pid/Tid.
///< The Process() function must return as soon as possible.
int Source(void);
///< Returns the source of the data delivered to this filter.
int Transponder(void);
///< Returns the transponder of the data delivered to this filter.
const cChannel *Channel(void);
///< Returns the channel of the data delivered to this filter.
bool Matches(u_short Pid, u_char Tid);
///< Indicates whether this filter wants to receive data from the given Pid/Tid.
void Set(u_short Pid, u_char Tid, u_char Mask = 0xFF);
///< Sets the given filter data by calling Add() with Sticky = true.
void Add(u_short Pid, u_char Tid, u_char Mask = 0xFF, bool Sticky = false);
///< Adds the given filter data to this filter.
///< If Sticky is true, this will survive a status change, otherwise
///< it will be automatically deleted.
void Del(u_short Pid, u_char Tid, u_char Mask = 0xFF);
///< Deletes the given filter data from this filter.
};
#endif //__FILTER_H
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