/* -*- c++ -*- */
/*
 * Copyright 2009,2012 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_PFB_DECIMATOR_CCF_IMPL_H
#define INCLUDED_PFB_DECIMATOR_CCF_IMPL_H

#include <gnuradio/filter/pfb_decimator_ccf.h>
#include <gnuradio/filter/polyphase_filterbank.h>
#include <gnuradio/thread/thread.h>

namespace gr {
namespace filter {

class FILTER_API pfb_decimator_ccf_impl : public pfb_decimator_ccf,
                                          kernel::polyphase_filterbank
{
private:
    bool d_updated;
    unsigned int d_rate;
    unsigned int d_chan;
    bool d_use_fft_rotator;
    bool d_use_fft_filters;
    gr_complex* d_rotator;
    gr_complex* d_tmp;         // used for fft filters
    gr::thread::mutex d_mutex; // mutex to protect set/work access

    inline int work_fir_exp(int noutput_items,
                            gr_vector_const_void_star& input_items,
                            gr_vector_void_star& output_items);
    inline int work_fir_fft(int noutput_items,
                            gr_vector_const_void_star& input_items,
                            gr_vector_void_star& output_items);
    inline int work_fft_exp(int noutput_items,
                            gr_vector_const_void_star& input_items,
                            gr_vector_void_star& output_items);
    inline int work_fft_fft(int noutput_items,
                            gr_vector_const_void_star& input_items,
                            gr_vector_void_star& output_items);

public:
    pfb_decimator_ccf_impl(unsigned int decim,
                           const std::vector<float>& taps,
                           unsigned int channel,
                           bool use_fft_rotator = true,
                           bool use_fft_filters = true);

    ~pfb_decimator_ccf_impl();

    void set_taps(const std::vector<float>& taps);
    void print_taps();
    std::vector<std::vector<float>> taps() const;
    void set_channel(const unsigned int channel);

    // Overload to create/destroy d_tmp based on max_noutput_items.
    bool start();
    bool stop();

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

} /* namespace filter */
} /* namespace gr */

#endif /* INCLUDED_PFB_DECIMATOR_CCF_IMPL_H */
