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/* -*- c++ -*- */
/*
* Copyright 2008 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.
*/
#ifndef INCLUDED_GR_CPFSK_BC_H
#define INCLUDED_GR_CPFSK_BC_H
#include <gr_core_api.h>
#include <gr_sync_interpolator.h>
class gr_cpfsk_bc;
typedef boost::shared_ptr<gr_cpfsk_bc> gr_cpfsk_bc_sptr;
GR_CORE_API gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
/*!
* \brief Perform continuous phase 2-level frequency shift keying modulation
* on an input stream of unpacked bits.
* \ingroup modulation_blk
*
* \param k modulation index
* \param ampl output amplitude
* \param samples_per_sym number of output samples per input bit
*/
class GR_CORE_API gr_cpfsk_bc : public gr_sync_interpolator
{
private:
friend GR_CORE_API gr_cpfsk_bc_sptr gr_make_cpfsk_bc(float k, float ampl, int samples_per_sym);
gr_cpfsk_bc(float k, float ampl, int samples_per_sym);
int d_samples_per_sym; // Samples per symbol, square pulse
float d_freq; // Modulation index*pi/samples_per_sym
float d_ampl; // Output amplitude
float d_phase; // Current phase
public:
~gr_cpfsk_bc();
void set_amplitude(float amplitude) { d_ampl = amplitude; }
int work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items);
};
#endif /* INCLUDED_GR_CPFSK_BC_H */
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