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GrBitSource.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 00038 #ifndef _GRBITSOURCE_H_ 00039 #define _GRBITSOURCE_H_ 00040 00041 #include <VrSource.h> 00042 #include <stdlib.h> 00043 00044 enum { GR_RANDOM, GR_FILE, GR_PATTERN }; 00045 00046 template<class oType> 00047 class GrBitSource : public VrSource<oType> { 00048 protected: 00049 int type; 00050 int mask; 00051 public: 00052 virtual const char *name() { return "GrBitSource"; } 00053 00054 virtual int work2(VrSampleRange output, void *o[]); 00055 00056 GrBitSource(double sampfreq, int type, int bps) 00057 :type(type),mask( (1<<bps) - 1) { 00058 setSamplingFrequency(sampfreq); 00059 } 00060 00061 GrBitSource(double sampfreq, int type) 00062 :type(type),mask(1) { 00063 setSamplingFrequency(sampfreq); 00064 } 00065 00066 }; 00067 00068 template<class oType> int 00069 GrBitSource<oType>::work2(VrSampleRange output, void *ao[]) 00070 { 00071 oType **o = (oType **)ao; 00072 unsigned int size = output.size; 00073 if(type == GR_RANDOM) 00074 for (unsigned int i=0; i<size; i++) 00075 *o[0]++ = random() & mask; // This is ok on the linux C library 00076 else 00077 { 00078 cerr << "Unsupported Bit Type" << endl; 00079 exit(-1); 00080 } 00081 return output.size; // Others should use the slower mod method 00082 } 00083 00084 #endif

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