mirror of https://github.com/VDR4Arch/vdr.git
95 lines
3.6 KiB
C++
95 lines
3.6 KiB
C++
/*
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* filter.h: 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: filter.h 4.2 2015/07/25 10:03:44 kls Exp $
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*/
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#ifndef __FILTER_H
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#define __FILTER_H
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#include <sys/types.h>
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#include "tools.h"
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class cSectionSyncer {
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private:
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int currentVersion;
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int currentSection;
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bool synced;
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bool complete;
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uchar sections[32]; // holds 32 * 8 = 256 bits, as flags for the sections
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void SetSectionFlag(uchar Section, bool On) { if (On) sections[Section / 8] |= (1 << (Section % 8)); else sections[Section / 8] &= ~(1 << (Section % 8)); }
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bool GetSectionFlag(uchar Section) { return sections[Section / 8] & (1 << (Section % 8)); }
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public:
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cSectionSyncer(void);
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void Reset(void);
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void Repeat(void);
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bool Complete(void) { return complete; }
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bool Sync(uchar Version, int Number, int LastNumber);
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};
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class cFilterData : public cListObject {
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public:
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u_short pid;
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u_char tid;
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u_char mask;
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bool sticky;
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cFilterData(void);
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cFilterData(u_short Pid, u_char Tid, u_char Mask, bool Sticky);
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bool Is(u_short Pid, u_char Tid, u_char Mask);
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bool Matches(u_short Pid, u_char Tid);
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};
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class cChannel;
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class cSectionHandler;
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class cFilter : public cListObject {
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friend class cSectionHandler;
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private:
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cSectionHandler *sectionHandler;
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cList<cFilterData> data;
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bool on;
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protected:
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cFilter(void);
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cFilter(u_short Pid, u_char Tid, u_char Mask = 0xFF);
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virtual ~cFilter();
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virtual void SetStatus(bool On);
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///< Turns this filter on or off, depending on the value of On.
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///< If the filter is turned off, any filter data that has been
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///< added without the Sticky parameter set to 'true' will be
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///< automatically deleted. Those parameters that have been added
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///< with Sticky set to 'true' will be automatically reused when
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///< SetStatus(true) is called.
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virtual void Process(u_short Pid, u_char Tid, const u_char *Data, int Length) = 0;
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///< Processes the data delivered to this filter.
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///< Pid and Tid is one of the combinations added to this filter by
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///< a previous call to Add(), Data is a pointer to Length bytes of
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///< data. This function will be called from the section handler's
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///< thread, so it has to use proper locking mechanisms in case it
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///< accesses any global data. It is guaranteed that if several cFilters
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///< are attached to the same cSectionHandler, only _one_ of them has
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///< its Process() function called at any given time. It is allowed
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///< that more than one cFilter are set up to receive the same Pid/Tid.
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///< The Process() function must return as soon as possible.
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int Source(void);
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///< Returns the source of the data delivered to this filter.
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int Transponder(void);
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///< Returns the transponder of the data delivered to this filter.
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const cChannel *Channel(void);
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///< Returns the channel of the data delivered to this filter.
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bool Matches(u_short Pid, u_char Tid);
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///< Indicates whether this filter wants to receive data from the given Pid/Tid.
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void Set(u_short Pid, u_char Tid, u_char Mask = 0xFF);
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///< Sets the given filter data by calling Add() with Sticky = true.
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void Add(u_short Pid, u_char Tid, u_char Mask = 0xFF, bool Sticky = false);
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///< Adds the given filter data to this filter.
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///< If Sticky is true, this will survive a status change, otherwise
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///< it will be automatically deleted.
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void Del(u_short Pid, u_char Tid, u_char Mask = 0xFF);
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///< Deletes the given filter data from this filter.
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};
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#endif //__FILTER_H
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