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/*
* receiver.h: The basic receiver interface
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: receiver.h 1.1 2002/06/08 15:32:51 kls Exp $
*/
#ifndef __RECEIVER_H
#define __RECEIVER_H
#include "device.h"
#define MAXRECEIVEPIDS 16 // the maximum number of PIDs per receiver
class cReceiver {
friend class cDevice;
private:
cDevice *device;
int ca;
int priority;
int pids[MAXRECEIVEPIDS];
bool WantsPid(int Pid);
protected:
void Detach(void);
virtual void Activate(bool On) {}
// This function is called just before the cReceiver gets attached to
// (On == true) or detached from (On == false) a cDevice. It can be used
// to do things like starting/stopping a thread.
// It is guaranteed that Receive() will not be called before Activate(true).
virtual void Receive(uchar *Data, int Length) = 0;
// This function is called from the cDevice we are attached to, and
// delivers one TS packet from the set of PIDs the cReceiver has requested.
// The data packet must be accepted immediately, and the call must return
// as soon as possible, without any unnecessary delay. Each TS packet
// will be delivered only ONCE, so the cReceiver must make sure that
// it will be able to buffer the data if necessary.
public:
cReceiver(int Ca, int Priority, int NumPids, ...);
// Creates a new receiver that requires conditional access Ca and has
// the given Priority. NumPids defines the number of PIDs that follow
// this parameter. If any of these PIDs are 0, they will be silently ignored.
// The total number of non-zero PIDs must not exceed MAXRECEIVEPIDS.
virtual ~cReceiver();
};
#endif //__RECEIVER_H
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