diff options
Diffstat (limited to 'gr-pager/src/pager_slicer_fb.cc')
-rw-r--r-- | gr-pager/src/pager_slicer_fb.cc | 84 |
1 files changed, 0 insertions, 84 deletions
diff --git a/gr-pager/src/pager_slicer_fb.cc b/gr-pager/src/pager_slicer_fb.cc deleted file mode 100644 index d419db78a..000000000 --- a/gr-pager/src/pager_slicer_fb.cc +++ /dev/null @@ -1,84 +0,0 @@ -/* - * Copyright 2004,2006,2007 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 <pager_slicer_fb.h> -#include <gr_io_signature.h> - -pager_slicer_fb_sptr pager_make_slicer_fb(float alpha) -{ - return pager_slicer_fb_sptr(new pager_slicer_fb(alpha)); -} - -pager_slicer_fb::pager_slicer_fb(float alpha) : - gr_sync_block ("slicer_fb", - gr_make_io_signature (1, 1, sizeof(float)), - gr_make_io_signature (1, 1, sizeof(unsigned char))) -{ - d_alpha = alpha; - d_beta = 1.0-alpha; - d_avg = 0.0; -} - -// Tracks average, minimum, and peak, then converts input into one of: -// -// [0, 1, 2, 3] -unsigned char pager_slicer_fb::slice(float sample) -{ - unsigned char decision; - - // Update DC level and remove - d_avg = d_avg*d_beta+sample*d_alpha; - sample -= d_avg; - - if (sample > 0) { - if (sample > 2.0) - decision = 3; - else - decision = 2; - } - else { - if (sample < -2.0) - decision = 0; - else - decision = 1; - } - - return decision; -} - -int pager_slicer_fb::work(int noutput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items) -{ - float *iptr = (float *) input_items[0]; - unsigned char *optr = (unsigned char *) output_items[0]; - - int size = noutput_items; - - for (int i = 0; i < size; i++) - *optr++ = slice(*iptr++); - - return noutput_items; -} |