unpack_byte_2bit_cpx_samples.h

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/*!
 * \file unpack_byte_2bit_cpx_samples.h
 *
 * \brief Unpacks byte samples to 2 bits complex samples.
 *     Packing Order
 *     Most Significant Nibble  - Sample n
 *     Least Significant Nibble - Sample n+1
 *     Packing order in Nibble Q1 Q0 I1 I0
 * \author Javier Arribas jarribas (at) cttc.es
 * -----------------------------------------------------------------------------
 *
 * Copyright (C) 2010-2020  (see AUTHORS file for a list of contributors)
 *
 * GNSS-SDR is a software defined Global Navigation
 *          Satellite Systems receiver
 *
 * This file is part of GNSS-SDR.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * -----------------------------------------------------------------------------
 */

#ifndef GNSS_SDR_UNPACK_BYTE_2BIT_CPX_SAMPLES_H
#define GNSS_SDR_UNPACK_BYTE_2BIT_CPX_SAMPLES_H

#include <gnuradio/sync_interpolator.h>
#if GNURADIO_USES_STD_POINTERS
#include <memory>
#else
#include <boost/shared_ptr.hpp>
#endif

class unpack_byte_2bit_cpx_samples;

#if GNURADIO_USES_STD_POINTERS
using unpack_byte_2bit_cpx_samples_sptr = std::shared_ptr<unpack_byte_2bit_cpx_samples>;
#else
using unpack_byte_2bit_cpx_samples_sptr = boost::shared_ptr<unpack_byte_2bit_cpx_samples>;
#endif

unpack_byte_2bit_cpx_samples_sptr make_unpack_byte_2bit_cpx_samples();

/*!
 * \brief This class implements conversion between byte packet samples to 2bit_cpx samples
 *  1 byte = 2 x complex 2bit I, + 2bit Q samples
 */
class unpack_byte_2bit_cpx_samples : public gr::sync_interpolator
{
public:
    unpack_byte_2bit_cpx_samples();
    ~unpack_byte_2bit_cpx_samples() = default;
    int work(int noutput_items,
        gr_vector_const_void_star &input_items,
        gr_vector_void_star &output_items);

private:
    friend unpack_byte_2bit_cpx_samples_sptr make_unpack_byte_2bit_cpx_samples_sptr();
};

#endif  // GNSS_SDR_UNPACK_BYTE_2BIT_CPX_SAMPLES_H