uhd

//

// Copyright 2011 Ettus Research LLC

//

// This program 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 of the License, or

// (at your option) any later version.

//

// This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.

//

#ifndef INCLUDED_LIBUHD_CONVERT_COMMON_HPP

#define INCLUDED_LIBUHD_CONVERT_COMMON_HPP

#include <uhd/convert.hpp>

#include <uhd/utils/static.hpp>

#include <boost/cstdint.hpp>

#include <complex>

#define DECLARE_CONVERTER(fcn, prio) \

    static void fcn( \

        uhd::convert::input_type &inputs, \

        uhd::convert::output_type &outputs, \

        size_t nsamps \

    ); \

    UHD_STATIC_BLOCK(register_##fcn##_##prio){ \

        uhd::convert::register_converter(#fcn, fcn, prio); \

    } \

    static void fcn( \

        uhd::convert::input_type &inputs, \

        uhd::convert::output_type &outputs, \

        size_t nsamps \

    )

/***********************************************************************

 * Typedefs

 **********************************************************************/

typedef std::complex<double>         fc64_t;

typedef std::complex<float>          fc32_t;

typedef std::complex<boost::int16_t> sc16_t;

typedef std::complex<boost::int8_t>  sc8_t;

typedef boost::uint32_t              item32_t;

/***********************************************************************

 * Convert complex short buffer to items32

 **********************************************************************/

static UHD_INLINE item32_t sc16_to_item32(sc16_t num){

    boost::uint16_t real = num.real();

    boost::uint16_t imag = num.imag();

    return (item32_t(real) << 16) | (item32_t(imag) << 0);

}

/***********************************************************************

 * Convert items32 buffer to complex short

 **********************************************************************/

static UHD_INLINE sc16_t item32_to_sc16(item32_t item){

    return sc16_t(

        boost::int16_t(item >> 16),

        boost::int16_t(item >> 0)

    );

}

/***********************************************************************

 * Convert complex float buffer to items32 (no swap)

 **********************************************************************/

static const float shorts_per_float = float(32767);

static UHD_INLINE item32_t fc32_to_item32(fc32_t num){

    boost::uint16_t real = boost::int16_t(num.real()*shorts_per_float);

    boost::uint16_t imag = boost::int16_t(num.imag()*shorts_per_float);

    return (item32_t(real) << 16) | (item32_t(imag) << 0);

}

/***********************************************************************

 * Convert items32 buffer to complex float

 **********************************************************************/

static const float floats_per_short = float(1.0/shorts_per_float);

static UHD_INLINE fc32_t item32_to_fc32(item32_t item){

    return fc32_t(

        float(boost::int16_t(item >> 16)*floats_per_short),

        float(boost::int16_t(item >> 0)*floats_per_short)

    );

}

/***********************************************************************

 * Convert complex double buffer to items32 (no swap)

 **********************************************************************/

static const double shorts_per_double = double(32767);

static UHD_INLINE item32_t fc64_to_item32(fc64_t num){

    boost::uint16_t real = boost::int16_t(num.real()*shorts_per_double);

    boost::uint16_t imag = boost::int16_t(num.imag()*shorts_per_double);

    return (item32_t(real) << 16) | (item32_t(imag) << 0);

}

/***********************************************************************

 * Convert items32 buffer to complex double

 **********************************************************************/

static const double doubles_per_short = double(1.0/shorts_per_double);

static UHD_INLINE fc64_t item32_to_fc64(item32_t item){

    return fc64_t(

        float(boost::int16_t(item >> 16)*doubles_per_short),

        float(boost::int16_t(item >> 0)*doubles_per_short)

    );

}

#endif /* INCLUDED_LIBUHD_CONVERT_COMMON_HPP */