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* Copyright 2003 Free Software Foundation, Inc.
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* This file is part of GNU Radio
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* GNU Radio 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, or (at your option)
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* GNU Radio 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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* You should have received a copy of the GNU General Public License
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* along with GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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* WARNING: This file is automatically generated by
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* generate_gr_freq_xlating_fir_filter_XXX.py
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* Any changes made to this file will be overwritten.
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#include <gr_freq_xlating_fir_filter_scc.h>
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#include <gr_fir_scc.h>
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#include <gr_fir_util.h>
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#include <gr_io_signature.h>
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gr_freq_xlating_fir_filter_scc_sptr
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gr_make_freq_xlating_fir_filter_scc (int decimation, const std::vector<gr_complex> &taps,
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double center_freq, double sampling_freq)
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return gr_freq_xlating_fir_filter_scc_sptr (new gr_freq_xlating_fir_filter_scc (decimation, taps, center_freq, sampling_freq));
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gr_freq_xlating_fir_filter_scc::gr_freq_xlating_fir_filter_scc (
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const std::vector<gr_complex> &taps,
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: gr_sync_decimator ("freq_xlating_fir_filter_scc",
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gr_make_io_signature (1, 1, sizeof (short)),
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gr_make_io_signature (1, 1, sizeof (gr_complex)),
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d_proto_taps (taps), d_center_freq (center_freq), d_sampling_freq (sampling_freq),
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std::vector<gr_complex> dummy_taps;
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d_composite_fir = gr_fir_util::create_gr_fir_scc (dummy_taps);
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set_history (d_proto_taps.size ());
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build_composite_fir ();
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gr_freq_xlating_fir_filter_scc::~gr_freq_xlating_fir_filter_scc ()
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delete d_composite_fir;
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gr_freq_xlating_fir_filter_scc::build_composite_fir ()
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std::vector<gr_complex> ctaps (d_proto_taps.size ());
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float fwT0 = 2 * M_PI * d_center_freq / d_sampling_freq;
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for (unsigned int i = 0; i < d_proto_taps.size (); i++)
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ctaps[i] = d_proto_taps[i] * exp (gr_complex (0, i * fwT0));
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d_composite_fir->set_taps (gr_reverse(ctaps));
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d_r.set_phase_incr (exp (gr_complex (0, fwT0 * decimation ())));
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gr_freq_xlating_fir_filter_scc::set_center_freq (double center_freq)
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d_center_freq = center_freq;
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gr_freq_xlating_fir_filter_scc::set_taps (const std::vector<gr_complex> &taps)
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gr_freq_xlating_fir_filter_scc::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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short *in = (short *) input_items[0];
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gr_complex *out = (gr_complex *) output_items[0];
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// rebuild composite FIR if the center freq has changed
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set_history (d_proto_taps.size ());
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build_composite_fir ();
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return 0; // history requirements may have changed.
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for (int i = 0; i < noutput_items; i++){
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out[i] = d_r.rotate (d_composite_fir->filter (&in[j]));
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return noutput_items;