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/* -*- c++ -*- */
/*
* Copyright 2004,2010,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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, or (at your option)
* any later version.
*
* GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <digital_bytes_to_syms.h>
#include <gr_io_signature.h>
#include <assert.h>
static const int BITS_PER_BYTE = 8;
digital_bytes_to_syms_sptr
digital_make_bytes_to_syms ()
{
return gnuradio::get_initial_sptr(new digital_bytes_to_syms ());
}
digital_bytes_to_syms::digital_bytes_to_syms ()
: gr_sync_interpolator ("bytes_to_syms",
gr_make_io_signature (1, 1, sizeof (unsigned char)),
gr_make_io_signature (1, 1, sizeof (float)),
BITS_PER_BYTE)
{
}
int
digital_bytes_to_syms::work (int noutput_items,
gr_vector_const_void_star &input_items,
gr_vector_void_star &output_items)
{
const unsigned char *in = (unsigned char *) input_items[0];
float *out = (float *) output_items[0];
assert (noutput_items % BITS_PER_BYTE == 0);
for (int i = 0; i < noutput_items / BITS_PER_BYTE; i++) {
int x = in[i];
*out++ = (((x >> 7) & 0x1) << 1) - 1;
*out++ = (((x >> 6) & 0x1) << 1) - 1;
*out++ = (((x >> 5) & 0x1) << 1) - 1;
*out++ = (((x >> 4) & 0x1) << 1) - 1;
*out++ = (((x >> 3) & 0x1) << 1) - 1;
*out++ = (((x >> 2) & 0x1) << 1) - 1;
*out++ = (((x >> 1) & 0x1) << 1) - 1;
*out++ = (((x >> 0) & 0x1) << 1) - 1;
}
return noutput_items;
}
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