/* -*- c++ -*- */
/*
 * Copyright 2010,2012 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_SYNTHESIZER_CCF_IMPL_H
#define INCLUDED_PFB_SYNTHESIZER_CCF_IMPL_H

#include <gnuradio/fft/fft.h>
#include <gnuradio/filter/fir_filter_with_buffer.h>
#include <gnuradio/filter/pfb_synthesizer_ccf.h>
#include <gnuradio/thread/thread.h>

namespace gr {
namespace filter {

// While this is a polyphase_filterbank, we don't use the normal
// parent class because we have to use the fir_filter_with_buffer
// objects instead of normal filters.

class FILTER_API pfb_synthesizer_ccf_impl : public pfb_synthesizer_ccf
{
private:
    bool d_updated;
    unsigned int d_numchans;
    unsigned int d_taps_per_filter;
    fft::fft_complex* d_fft;
    std::vector<kernel::fir_filter_with_buffer_ccf*> d_filters;
    std::vector<std::vector<float>> d_taps;
    int d_state;
    std::vector<int> d_channel_map;
    unsigned int d_twox;
    gr::thread::mutex d_mutex; // mutex to protect set/work access

    /*!
     * \brief Tap setting algorithm for critically sampled channels
     */
    void set_taps1(const std::vector<float>& taps);

    /*!
     * \brief Tap setting algorithm for 2x over-sampled channels
     */
    void set_taps2(const std::vector<float>& taps);


public:
    pfb_synthesizer_ccf_impl(unsigned int numchans,
                             const std::vector<float>& taps,
                             bool twox);
    ~pfb_synthesizer_ccf_impl();

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

    void set_channel_map(const std::vector<int>& map);
    std::vector<int> channel_map() const;

    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_SYNTHESIZER_CCF_IMPL_H */
