gr_fft_filter_fff.h

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/* -*- c++ -*- */
/*
 * Copyright 2005 Free Software Foundation, Inc.
 *
 * This file is part of GNU Radio
 *
 * GNU Radio 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 3, or (at your option)
 * any later version.
 *
 * GNU Radio 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 GNU Radio; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street,
 * Boston, MA 02110-1301, USA.
 */
#ifndef INCLUDED_GR_FFT_FILTER_FFF_H
#define INCLUDED_GR_FFT_FILTER_FFF_H

#include <gr_core_api.h>
#include <gr_sync_decimator.h>

class gr_fft_filter_fff;
typedef boost::shared_ptr<gr_fft_filter_fff> gr_fft_filter_fff_sptr;
GR_CORE_API gr_fft_filter_fff_sptr
gr_make_fft_filter_fff (int decimation, const std::vector<float> &taps,
                        int nthreads=1);

class gri_fft_filter_fff_generic;
//class gri_fft_filter_fff_sse;

/*!
 * \brief Fast FFT filter with float input, float output and float taps
 */
class GR_CORE_API gr_fft_filter_fff : public gr_sync_decimator
{
 private:
  friend GR_CORE_API gr_fft_filter_fff_sptr
    gr_make_fft_filter_fff (int decimation, const std::vector<float> &taps,
                            int nthreads);

  int                      d_nsamples;
  bool                     d_updated;
#if 1 // don't enable the sse version until handling it is worked out
  gri_fft_filter_fff_generic  *d_filter;
#else
  gri_fft_filter_fff_sse  *d_filter;
#endif
  std::vector<float>       d_new_taps;

  /*!
   * Construct a FFT filter with the given taps
   *
   * \param decimation  >= 1
   * \param taps        float filter taps
   * \param nthreads    number of threads for the FFT to use
   */
  gr_fft_filter_fff (int decimation, const std::vector<float> &taps,
                     int nthreads=1);

 public:
  ~gr_fft_filter_fff ();

  void set_taps (const std::vector<float> &taps);
  std::vector<float> taps () const;

  /*!
   * \brief Set number of threads to use.
   */
  void set_nthreads(int n);

  /*!
   * \brief Get number of threads being used.
   */
  int nthreads() const;

  int work (int noutput_items,
            gr_vector_const_void_star &input_items,
            gr_vector_void_star &output_items);
};

#endif /* INCLUDED_GR_FFT_FILTER_FFF_H */