mirror of https://github.com/gnss-sdr/gnss-sdr
74 lines
2.8 KiB
C++
74 lines
2.8 KiB
C++
/*!
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* \file byte_x2_to_complex_byte.cc
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* \brief Adapts two signed char streams into a std::complex<signed char> stream
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* \author Carles Fernandez Prades, cfernandez(at)cttc.es
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*
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* -------------------------------------------------------------------------
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*
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* Copyright (C) 2010-2018 (see AUTHORS file for a list of contributors)
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*
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* GNSS-SDR is a software defined Global Navigation
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* Satellite Systems receiver
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*
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* This file is part of GNSS-SDR.
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*
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* GNSS-SDR is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GNSS-SDR is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GNSS-SDR. If not, see <https://www.gnu.org/licenses/>.
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*
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* -------------------------------------------------------------------------
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*/
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#include "byte_x2_to_complex_byte.h"
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#include <gnuradio/io_signature.h>
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#include <volk_gnsssdr/volk_gnsssdr.h>
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#include <algorithm> // for max
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#include <complex> // for complex
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#include <cstdint> // for int8_t
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byte_x2_to_complex_byte_sptr make_byte_x2_to_complex_byte()
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{
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return byte_x2_to_complex_byte_sptr(new byte_x2_to_complex_byte());
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}
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byte_x2_to_complex_byte::byte_x2_to_complex_byte() : sync_block("byte_x2_to_complex_byte",
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gr::io_signature::make(2, 2, sizeof(int8_t)), // int8_t, defined in stdint.h and included in volk.h (signed char)
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gr::io_signature::make(1, 1, sizeof(lv_8sc_t))) // lv_8sc_t is a Volk's typedef for std::complex<signed char>
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{
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const int alignment_multiple = volk_gnsssdr_get_alignment() / sizeof(lv_8sc_t);
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set_alignment(std::max(1, alignment_multiple));
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}
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int byte_x2_to_complex_byte::work(int noutput_items,
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gr_vector_const_void_star &input_items,
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gr_vector_void_star &output_items)
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{
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const auto *in0 = reinterpret_cast<const int8_t *>(input_items[0]);
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const auto *in1 = reinterpret_cast<const int8_t *>(input_items[1]);
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auto *out = reinterpret_cast<lv_8sc_t *>(output_items[0]);
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// This could be put into a volk kernel
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int8_t real_part;
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int8_t imag_part;
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for (int number = 0; number < noutput_items; number++)
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{
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// lv_cmake(r, i) defined at volk/volk_complex.h
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real_part = *in0++;
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imag_part = *in1++;
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*out++ = lv_cmake(real_part, imag_part);
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}
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return noutput_items;
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}
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