/* -*- c++ -*- */
/*
 * Copyright 2010,2012,2018 Free Software Foundation, Inc.
 *
 * 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.
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "cpmmod_bc_impl.h"
#include <gnuradio/io_signature.h>
#include <gnuradio/math.h>

namespace gr {
namespace digital {

cpmmod_bc::sptr cpmmod_bc::make(
    analog::cpm::cpm_type type, float h, int samples_per_sym, int L, double beta)
{
    return gnuradio::get_initial_sptr(new cpmmod_bc_impl(
        "cpmmod_bc", (analog::cpm::cpm_type)type, h, samples_per_sym, L, beta));
}

cpmmod_bc::sptr cpmmod_bc::make_gmskmod_bc(int samples_per_sym, int L, double beta)
{
    return gnuradio::get_initial_sptr(new cpmmod_bc_impl(
        "gmskmod_bc", analog::cpm::GAUSSIAN, 0.5, samples_per_sym, L, beta));
}

cpmmod_bc_impl::cpmmod_bc_impl(const std::string& name,
                               analog::cpm::cpm_type type,
                               float h,
                               int samples_per_sym,
                               int L,
                               double beta)
    : hier_block2(name,
                  io_signature::make(1, 1, sizeof(char)),
                  io_signature::make2(1, 1, sizeof(gr_complex), sizeof(float))),
      d_type(type),
      d_index(h),
      d_sps(samples_per_sym),
      d_length(L),
      d_beta(beta),
      d_taps(analog::cpm::phase_response(type, samples_per_sym, L, beta)),
      d_char_to_float(blocks::char_to_float::make()),
      d_pulse_shaper(filter::interp_fir_filter_fff::make(samples_per_sym, d_taps)),
      d_fm(analog::frequency_modulator_fc::make(GR_M_PI * h))
{
    switch (type) {
    case analog::cpm::LRC:
    case analog::cpm::LSRC:
    case analog::cpm::LREC:
    case analog::cpm::TFM:
    case analog::cpm::GAUSSIAN:
        break;

    default:
        throw std::invalid_argument("cpmmod_bc_impl: invalid CPM type");
    }

    connect(self(), 0, d_char_to_float, 0);
    connect(d_char_to_float, 0, d_pulse_shaper, 0);
    connect(d_pulse_shaper, 0, d_fm, 0);
    connect(d_fm, 0, self(), 0);
}

cpmmod_bc_impl::~cpmmod_bc_impl() {}

std::vector<float> cpmmod_bc_impl::taps() const { return d_taps; }

int cpmmod_bc_impl::type() const { return d_type; }

float cpmmod_bc_impl::index() const { return d_index; }

int cpmmod_bc_impl::samples_per_sym() const { return d_sps; }

int cpmmod_bc_impl::length() const { return d_length; }

double cpmmod_bc_impl::beta() const { return d_beta; }

} /* namespace digital */
} /* namespace gr */
