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VrSource.h

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00001 /* -*- Mode: c++ -*- */
00002 /*
00003  * Copyright 2001 Free Software Foundation, Inc.
00004  * 
00005  * This file is part of GNU Radio
00006  * 
00007  * GNU Radio is free software; you can redistribute it and/or modify
00008  * it under the terms of the GNU General Public License as published by
00009  * the Free Software Foundation; either version 2, or (at your option)
00010  * any later version.
00011  * 
00012  * GNU Radio is distributed in the hope that it will be useful,
00013  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00014  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00015  * GNU General Public License for more details.
00016  * 
00017  * You should have received a copy of the GNU General Public License
00018  * along with GNU Radio; see the file COPYING.  If not, write to
00019  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
00020  * Boston, MA 02111-1307, USA.
00021  */
00022 /*
00023  *  Copyright 1997 Massachusetts Institute of Technology
00024  * 
00025  *  Permission to use, copy, modify, distribute, and sell this software and its
00026  *  documentation for any purpose is hereby granted without fee, provided that
00027  *  the above copyright notice appear in all copies and that both that
00028  *  copyright notice and this permission notice appear in supporting
00029  *  documentation, and that the name of M.I.T. not be used in advertising or
00030  *  publicity pertaining to distribution of the software without specific,
00031  *  written prior permission.  M.I.T. makes no representations about the
00032  *  suitability of this software for any purpose.  It is provided "as is"
00033  *  without express or implied warranty.
00034  * 
00035  */
00036 
00037 #ifndef _VRSOURCE_H_
00038 #define _VRSOURCE_H_
00039 
00040 #include <VrSigProc.h>
00041 
00042 template<class oType> 
00043 class VrSource : public VrSigProc {
00044 public:
00045   VrSource():VrSigProc(1, 0, sizeof(oType)) {};
00046   VrSource(int outputs):VrSigProc(outputs, 0, sizeof(oType)) {};
00047   virtual int forecast(VrSampleRange output,
00048                         VrSampleRange *inputs) {
00049     fprintf(stderr, "VrSource: forecast should never be called.\n");
00050     exit(-1);
00051     return -1;
00052   };
00053   virtual const char *name() { return "VrSource"; }
00054 
00055   virtual int work(VrSampleRange output, void *o[],
00056                     VrSampleRange inputs[], void *i[]) {
00057     return work2(output, o);
00058   };
00059   virtual int work2(VrSampleRange output, void *o[])=0;
00060   virtual bool isConnectedToSource() {return true;}
00061 }; 
00062 #endif 

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