103 lines
3.0 KiB
C++
103 lines
3.0 KiB
C++
/* -*- c++ -*- */
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/*
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* Copyright 2004 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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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 2, or (at your option)
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* any later version.
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*
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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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*
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Copyright 2010, KA1RBI
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*/
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/*
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* config.h is generated by configure. It contains the results
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* of probing for features, options etc. It should be the first
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* file included in your .cc file.
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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 <repeater_fsk4_slicer_fb.h>
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#include <gr_io_signature.h>
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/*
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* Create a new instance of repeater_fsk4_slicer_fb and return
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* a boost shared_ptr. This is effectively the public constructor.
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*/
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repeater_fsk4_slicer_fb_sptr
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repeater_make_fsk4_slicer_fb ()
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{
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return repeater_fsk4_slicer_fb_sptr (new repeater_fsk4_slicer_fb ());
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}
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/*
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* Specify constraints on number of input and output streams.
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* This info is used to construct the input and output signatures
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* (2nd & 3rd args to gr_block's constructor). The input and
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* output signatures are used by the runtime system to
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* check that a valid number and type of inputs and outputs
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* are connected to this block. In this case, we accept
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* only 1 input and 1 output.
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*/
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static const int MIN_IN = 1; // mininum number of input streams
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static const int MAX_IN = 1; // maximum number of input streams
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static const int MIN_OUT = 1; // minimum number of output streams
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static const int MAX_OUT = 1; // maximum number of output streams
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/*
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* The private constructor
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*/
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repeater_fsk4_slicer_fb::repeater_fsk4_slicer_fb ()
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: gr_sync_block ("fsk4_slicer_fb",
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gr_make_io_signature (MIN_IN, MAX_IN, sizeof (float)),
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gr_make_io_signature (MIN_OUT, MAX_OUT, sizeof (unsigned char)))
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{
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// nothing else required in this example
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}
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/*
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* Our virtual destructor.
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*/
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repeater_fsk4_slicer_fb::~repeater_fsk4_slicer_fb ()
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{
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// nothing else required in this example
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}
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int
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repeater_fsk4_slicer_fb::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 float *in = (const float *) input_items[0];
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unsigned char *out = (unsigned char *) output_items[0];
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for (int i = 0; i < noutput_items; i++){
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if (in[i] < -2.0) {
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out[i] = 3;
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} else if (in[i] < 0.0) {
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out[i] = 2;
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} else if (in[i] < 2.0) {
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out[i] = 0;
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} else {
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out[i] = 1;
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}
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}
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// Tell runtime system how many output items we produced.
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return noutput_items;
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}
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