00001 /* -*- Mode: c++ -*- */ 00002 /* 00003 * Copyright 2001,2003 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 _GRSOURCE_H_ 00038 #define _GRSOURCE_H_ 00039 00040 #include <VrSigProc.h> 00041 #include <stddef.h> // size_t 00042 #include <stdexcept> 00043 00044 class GrSource : public VrSigProc { 00045 public: 00046 GrSource (size_t sizeof_oType) : VrSigProc (1, 0, sizeof_oType) {}; 00047 GrSource (size_t sizeof_oType, int outputs) : VrSigProc (outputs, 0, sizeof_oType) {}; 00048 00049 virtual int forecast(VrSampleRange output, 00050 VrSampleRange *inputs) { 00051 fprintf(stderr, "GrSource: forecast should never be called.\n"); 00052 throw std::logic_error ("GrSource: forecast should never be called."); 00053 }; 00054 00055 virtual const char *name() { return "GrSource"; } 00056 00057 virtual int work(VrSampleRange output, void *o[], 00058 VrSampleRange inputs[], void *i[]) { 00059 return work2(output, o); 00060 }; 00061 00062 virtual int work2(VrSampleRange output, void *o[]) = 0; 00063 virtual bool isConnectedToSource() {return true;} 00064 }; 00065 00066 #endif