125 lines
3.6 KiB
C++
125 lines
3.6 KiB
C++
/* -*- c++ -*- */
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/*
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* gr-satnogs: SatNOGS GNU Radio Out-Of-Tree Module
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*
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* Copyright (C) 2017, Libre Space Foundation <http://librespacefoundation.org/>
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*
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* This program 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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* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <gnuradio/io_signature.h>
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#include "iq_sink_impl.h"
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#include <volk/volk.h>
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#include <stdexcept>
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namespace gr
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{
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namespace satnogs
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{
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iq_sink::sptr
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iq_sink::make (const float scale, const char *filename, bool append,
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const int status)
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{
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return gnuradio::get_initial_sptr (
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new iq_sink_impl (scale, filename, append, status));
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}
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/*
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* The private constructor
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*/
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iq_sink_impl::iq_sink_impl (const float scale, const char *filename,
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bool append, const int status) :
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gr::sync_block ("iq_sink",
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gr::io_signature::make (1, 1, sizeof(gr_complex)),
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gr::io_signature::make (0, 0, 0)),
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file_sink_base (filename, true, append),
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d_scale (scale),
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d_num_points (16384),
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d_status ((iq_sink_status_t) status)
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{
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set_max_noutput_items (d_num_points);
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unsigned int alignment = volk_get_alignment ();
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d_out = (int16_t*) volk_malloc (sizeof(int16_t) * d_num_points * 2,
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alignment);
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}
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/*
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* Our virtual destructor.
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*/
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iq_sink_impl::~iq_sink_impl ()
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{
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volk_free (d_out);
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}
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int
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iq_sink_impl::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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gr_complex *inbuf = (gr_complex*) input_items[0];
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int nwritten = 0;
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switch (d_status)
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{
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case IQ_SINK_STATUS_NULL:
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{
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return noutput_items;
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break;
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}
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case IQ_SINK_STATUS_ACTIVE:
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{
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/* update d_fp is required */
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do_update ();
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if (!d_fp)
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/* drop output on the floor */
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return noutput_items;
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volk_32f_s32f_convert_16i (d_out, (float*) inbuf, d_scale,
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noutput_items * 2);
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while (nwritten < noutput_items) {
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int count = fwrite (d_out, 2 * sizeof(int16_t),
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noutput_items - nwritten, d_fp);
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if (count == 0) {
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if (ferror (d_fp)) {
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std::cout << count << std::endl;
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std::stringstream s;
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s << "file_sink write failed with error " << fileno (d_fp)
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<< std::endl;
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throw std::runtime_error (s.str ());
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}
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/* if EOF */
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else {
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break;
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}
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}
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nwritten += count;
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}
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return nwritten;
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break;
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}
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}
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}
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} /* namespace satnogs */
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} /* namespace gr */
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