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GrDelay.h

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00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2002 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 #ifndef _GRDELAY_H_ 00024 #define _GRDELAY_H_ 00025 00026 #include <VrHistoryProc.h> 00027 00028 template<class iType, class oType> 00029 class GrDelay : public VrHistoryProc<iType,oType> 00030 { 00031 public: 00032 GrDelay (unsigned int maxdelay); 00033 00034 virtual const char *name () { return "GrDelay"; } 00035 virtual int work (VrSampleRange output, void *o[], 00036 VrSampleRange inputs[], void *i[]); 00037 virtual void set_delay (unsigned int del) { del = (delay>history) ? history : delay; }; 00038 protected: 00039 unsigned int delay; 00040 }; 00041 00042 template<class iType, class oType> 00043 GrDelay<iType, oType>::GrDelay (unsigned int maxdelay) 00044 : VrHistoryProc<iType, oType>(1), delay(maxdelay) 00045 { 00046 history = delay+1; 00047 } 00048 00049 template<class iType, class oType> int 00050 GrDelay<iType, oType>::work (VrSampleRange output, void *ao[], 00051 VrSampleRange inputs[], void *ai[]) 00052 { 00053 iType **in = (iType **) ai; 00054 oType **out = (oType **) ao; 00055 unsigned int size = output.size; 00056 for(unsigned int samp=0; samp < size; samp++) 00057 out[0][samp] = in[0][samp + history - delay]; 00058 00059 return output.size; 00060 } 00061 00062 #endif

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