fftdecimator.hh

各种工程计算的库函数

/*

    FFT Decimation class, header
    Copyright (C) 2000-2005 Jussi Laako

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/


#include "dsp/DSPOp.hh"
#include "dsp/FFTMultiRate.hh"


#ifndef FFTDECIMATOR_HH
    #define FFTDECIMATOR_HH


    /**
        FFT decimation filter class implementation.

        Data is filtered using FFT filter and then decimated.
    */
    class clFFTDecimator : public clFFTMultiRate
    {
            clDSPAlloc DecBuf;
            clDSPOp DSP;
        public:
            clFFTDecimator ();
            virtual ~clFFTDecimator ();
            /**
                Uninitialize decimator.
            */
            void Uninitialize ();
            /**
                Feed data into decimator.

                \param SrcData Source data
                \param SrcCount Source data count
            */
            void Put (const float *, long);
            /// \overload
            void Put (const double *, long);
            /**
                Get data from decimator.

                Returns false if there's not enough data feeded into
                the decimator.

                \param DestData Destination buffer
                \param DestCount Number of samples
                \return Data was available?
            */
            bool Get (float *, long);
            /// \overload
            bool Get (double *, long);
    };

#endif