GNU Radio 3.5.3.2 C++ API
gr_fir_fsf_generic.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 3, 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., 51 Franklin Street,
00020  * Boston, MA 02110-1301, USA.
00021  */
00022 #ifndef INCLUDED_GR_FIR_FSF_GENERIC_H
00023 #define INCLUDED_GR_FIR_FSF_GENERIC_H
00024 
00025 #include <gr_core_api.h>
00026 #include <gr_fir_fsf.h>
00027 
00028 /*!
00029  * \brief Concrete class for generic implementation of FIR with float input, short output and float taps
00030  *
00031  * The trailing suffix has the form _IOT where I codes the input type,
00032  * O codes the output type, and T codes the tap type.
00033  * I,O,T are elements of the set 's' (short), 'f' (float), 'c' (gr_complex), 'i' (int)
00034  */
00035 
00036 class GR_CORE_API gr_fir_fsf_generic : public gr_fir_fsf {
00037 
00038 public:
00039 
00040   // CREATORS
00041   
00042   gr_fir_fsf_generic () {}
00043   gr_fir_fsf_generic (const std::vector<float> &taps) : gr_fir_fsf (taps) {}
00044 
00045   // MANIPULATORS
00046 
00047   /*!
00048    * \brief compute a single output value.
00049    *
00050    * \p input must have ntaps() valid entries.
00051    * input[0] .. input[ntaps() - 1] are referenced to compute the output value.
00052    *
00053    * \returns the filtered input value.
00054    */
00055   virtual short filter (const float input[]);
00056 
00057   /*!
00058    * \brief compute an array of N output values.
00059    *
00060    * \p input must have (n - 1 + ntaps()) valid entries.
00061    * input[0] .. input[n - 1 + ntaps() - 1] are referenced to compute the output values.
00062    */
00063   virtual void filterN (short output[], const float input[],
00064                         unsigned long n);
00065 
00066   /*!
00067    * \brief compute an array of N output values, decimating the input
00068    *
00069    * \p input must have (decimate * (n - 1) + ntaps()) valid entries.
00070    * input[0] .. input[decimate * (n - 1) + ntaps() - 1] are referenced to 
00071    * compute the output values.
00072    */
00073   virtual void filterNdec (short output[], const float input[],
00074                            unsigned long n, unsigned decimate);
00075 
00076 };
00077 
00078 #endif /* INCLUDED_GR_FIR_FSF_GENERIC_H */