326 lines
15 KiB
C++
326 lines
15 KiB
C++
/* -*- c++ -*- */
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/*
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* GNU Radio interface for Pavel Yazev's Project 25 IMBE Encoder/Decoder
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*
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* Copyright 2009 Pavel Yazev E-mail: pyazev@gmail.com
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* Copyright 2009, 2010, 2011, 2012, 2013, 2014 KA1RBI
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*
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* This 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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* any later version.
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*
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* This software 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 software; 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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*/
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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 "p25p1_voice_encode.h"
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#include <vector>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "imbe_vocoder/imbe_vocoder.h"
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#include "p25_frame.h"
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#include "op25_imbe_frame.h"
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namespace gr {
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namespace op25_repeater {
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/* bits to be preset to 1 for all transmitted frames */
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static const bool ldu1_preset[] = {
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0-35 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 36-71 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 72-107 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 108-143 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 144-179 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 180-215 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 216-251 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 252-287 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 288-323 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 324-359 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 360-395 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 396-431 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 432-467 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 468-503 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 504-539 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 540-575 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 576-611 */
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0,1,0,1,1,0,1,1,0,1,0,1,0,1,0,1,1,0,0,1,0,1,0,1,0,1,1,0,0,0,0,0,0,0,1,0, /* 612-647 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 648-683 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 684-719 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 720-755 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0, /* 756-791 */
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1,0,1,0,0,1,1,0,1,0,1,0,1,0,0,1,1,0,1,0,1,0,1,0,0,1,1,0,1,0,1,0,1,0,0,1, /* 792-827 */
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1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 828-863 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 864-899 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 900-935 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 936-971 */
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0,0,0,0,0,0,1,0,1,1,1,0,0,0,0,1,1,1,1,1,0,0,1,1,1,1,1,0,0,1,0,1,0,1,1,0, /* 972-1007 */
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0,1,0,0,1,0,0,1,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1008-1043 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1044-1079 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1080-1115 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1116-1151 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,1,1,1,0,1,1, /* 1152-1187 */
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1,1,1,1,0,0,1,1,1,1,0,0,0,0,1,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1188-1223 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1224-1259 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1260-1295 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1296-1331 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,0,1,0,0,0,0,1,1, /* 1332-1367 */
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1,1,1,0,1,1,0,1,1,1,0,0,1,0,1,1,0,1,0,0,0,1,1,0,1,1,1,0,0,1,0,0,0,0,0,0, /* 1368-1403 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1404-1439 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1440-1475 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1476-1511 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1512-1547 */
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1,0,1,0,1,0,0,1,0,0,0,0,1,0,1,0,1,0,1,0,1,0,0,1,0,0,0,0,1,0,0,0,0,0,1,0, /* 1548-1583 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1584-1619 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1620-1655 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1656-1691 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0 /* 1692-1727 */
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};
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static const bool ldu2_preset[] = {
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 0-35 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 36-71 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 72-107 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 108-143 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 144-179 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 180-215 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 216-251 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 252-287 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 288-323 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 324-359 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 360-395 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 396-431 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 432-467 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 468-503 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 504-539 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 540-575 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 576-611 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 612-647 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 648-683 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 684-719 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 720-755 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 756-791 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 792-827 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 828-863 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 864-899 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1, /* 900-935 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 936-971 */
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0,0,0,0,0,0,1,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 972-1007 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1008-1043 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1044-1079 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1080-1115 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1116-1151 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,1,0,1,1,1,0,1,0,0,0,1,0,1,1,0,1,0,0, /* 1152-1187 */
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1,0,0,0,1,0,1,1,0,1,1,0,0,1,0,0,1,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1188-1223 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1224-1259 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1260-1295 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1296-1331 */
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0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,1,1,0,1,0,1,0,1,1, /* 1332-1367 */
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1,1,1,1,0,1,0,0,1,1,1,1,0,0,0,1,1,1,1,1,1,1,0,1,0,1,1,0,0,0,0,0,0,0,0,0, /* 1368-1403 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1404-1439 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1440-1475 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1476-1511 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1512-1547 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1548-1583 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1584-1619 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1620-1655 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, /* 1656-1691 */
|
|
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0, /* 1692-1727 */
|
|
};
|
|
|
|
static void clear_bits(bit_vector& v) {
|
|
for (size_t i=0; i<v.size(); i++) {
|
|
v[i]=0;
|
|
}
|
|
}
|
|
|
|
p25p1_voice_encode::p25p1_voice_encode(bool verbose_flag, int stretch_amt, const op25_audio& udp, bool raw_vectors_flag, std::deque<uint8_t> &_output_queue) :
|
|
op25audio(udp),
|
|
frame_cnt(0),
|
|
write_bufp(0),
|
|
peak_amplitude(0),
|
|
peak(0),
|
|
samp_ct(0),
|
|
codeword_ct(0),
|
|
sampbuf_ct(0),
|
|
stretch_count(0),
|
|
output_queue(_output_queue),
|
|
f_body(P25_VOICE_FRAME_SIZE),
|
|
opt_dump_raw_vectors(raw_vectors_flag),
|
|
opt_verbose(verbose_flag)
|
|
{
|
|
opt_stretch_amt = 0;
|
|
if (stretch_amt < 0) {
|
|
opt_stretch_sign = -1;
|
|
opt_stretch_amt = 0 - stretch_amt;
|
|
} else {
|
|
opt_stretch_sign = 1;
|
|
opt_stretch_amt = stretch_amt;
|
|
}
|
|
|
|
clear_bits(f_body);
|
|
}
|
|
|
|
/*
|
|
* Our virtual destructor.
|
|
*/
|
|
p25p1_voice_encode::~p25p1_voice_encode()
|
|
{
|
|
}
|
|
|
|
static const int STATS_INTERVAL = 20;
|
|
static const int SAMP_INTERVAL = 8192;
|
|
|
|
void p25p1_voice_encode::append_imbe_codeword(bit_vector& frame_body, int16_t frame_vector[], unsigned int& codeword_ct)
|
|
{
|
|
voice_codeword cw(voice_codeword_sz);
|
|
uint8_t obuf[P25_VOICE_FRAME_SIZE/2];
|
|
// construct 144-bit codeword from 88 bits of parameters
|
|
imbe_header_encode(cw, frame_vector[0], frame_vector[1], frame_vector[2], frame_vector[3], frame_vector[4], frame_vector[5], frame_vector[6], frame_vector[7]);
|
|
|
|
// add codeword to voice data unit
|
|
imbe_interleave(frame_body, cw, codeword_ct);
|
|
|
|
// after the ninth and final codeword added, dispose of frame
|
|
if (++codeword_ct >= nof_voice_codewords) {
|
|
static const uint64_t hws[2] = { 0x293555ef2c653437LL, 0x293aba93bec26a2bLL };
|
|
int ldu_type = frame_cnt & 1; // set ldu_type = 0(LDU1) or 1(LDU2)
|
|
const bool* ldu_preset = (ldu_type == 0) ? ldu1_preset : ldu2_preset;
|
|
|
|
p25_setup_frame_header(frame_body, hws[ldu_type]);
|
|
for (size_t i = 0; i < frame_body.size(); i++) {
|
|
frame_body[i] = frame_body[i] | ldu_preset[i];
|
|
}
|
|
// finally, output the frame
|
|
if (op25audio.enabled()) {
|
|
// pack the bits into bytes, MSB first
|
|
size_t obuf_ct = 0;
|
|
for (uint32_t i = 0; i < P25_VOICE_FRAME_SIZE; i += 8) {
|
|
uint8_t b =
|
|
(frame_body[i+0] << 7) +
|
|
(frame_body[i+1] << 6) +
|
|
(frame_body[i+2] << 5) +
|
|
(frame_body[i+3] << 4) +
|
|
(frame_body[i+4] << 3) +
|
|
(frame_body[i+5] << 2) +
|
|
(frame_body[i+6] << 1) +
|
|
(frame_body[i+7] );
|
|
obuf[obuf_ct++] = b;
|
|
}
|
|
op25audio.send_to(obuf, obuf_ct);
|
|
} else {
|
|
for (uint32_t i = 0; i < P25_VOICE_FRAME_SIZE; i += 2) {
|
|
uint8_t dibit =
|
|
(frame_body[i+0] << 1) +
|
|
(frame_body[i+1] );
|
|
output_queue.push_back(dibit);
|
|
}
|
|
}
|
|
codeword_ct = 0;
|
|
frame_cnt++;
|
|
if (opt_verbose && (frame_cnt % STATS_INTERVAL) == 0) {
|
|
gettimeofday(&tv, &tz);
|
|
int s = tv.tv_sec - oldtv.tv_sec;
|
|
int us = tv.tv_usec - oldtv.tv_usec;
|
|
if (us < 0) {
|
|
us = us + 1000000;
|
|
s = s - 1;
|
|
}
|
|
float f = us;
|
|
f /= 1000000;
|
|
f += s;
|
|
fprintf (stderr, "time %f peak %5d\n", f / STATS_INTERVAL, peak_amplitude);
|
|
oldtv = tv;
|
|
}
|
|
clear_bits(f_body);
|
|
}
|
|
}
|
|
|
|
void p25p1_voice_encode::compress_frame(int16_t snd[])
|
|
{
|
|
int16_t frame_vector[8];
|
|
|
|
// encode 160 audio samples into 88 bits (u0-u7)
|
|
vocoder.imbe_encode(frame_vector, snd);
|
|
|
|
// if dump option, dump u0-u7 to output
|
|
if (opt_dump_raw_vectors) {
|
|
char s[128];
|
|
sprintf(s, "%03x %03x %03x %03x %03x %03x %03x %03x\n", frame_vector[0], frame_vector[1], frame_vector[2], frame_vector[3], frame_vector[4], frame_vector[5], frame_vector[6], frame_vector[7]);
|
|
memcpy(&write_buf[write_bufp], s, strlen(s));
|
|
write_bufp += strlen(s);
|
|
if (write_bufp >= 288) {
|
|
op25audio.send_to(write_buf, 288);
|
|
write_bufp = 0;
|
|
}
|
|
return;
|
|
}
|
|
append_imbe_codeword(f_body, frame_vector, codeword_ct);
|
|
}
|
|
|
|
void p25p1_voice_encode::add_sample(int16_t samp)
|
|
{
|
|
// add one sample to 160-sample frame buffer and process if filled
|
|
sampbuf[sampbuf_ct++] = samp;
|
|
if (sampbuf_ct >= FRAME) {
|
|
compress_frame(sampbuf);
|
|
sampbuf_ct = 0;
|
|
}
|
|
|
|
// track signal amplitudes
|
|
int16_t asamp = (samp < 0) ? 0 - samp : samp;
|
|
peak = (asamp > peak) ? asamp : peak;
|
|
if (++samp_ct >= SAMP_INTERVAL) {
|
|
peak_amplitude = peak;
|
|
peak = 0;
|
|
samp_ct = 0;
|
|
}
|
|
}
|
|
|
|
void p25p1_voice_encode::compress_samp(const int16_t * samp, int len)
|
|
{
|
|
// Apply sample rate slew to accomodate sound card rate discrepancy -
|
|
// workaround for USRP underrun problem occurring when sound card
|
|
// capture rate is slower than the correct rate
|
|
|
|
// FIXME: autodetect proper value for opt_stretch_amt
|
|
// perhaps by steering the LDU output rate to a 180.0 msec. rate
|
|
|
|
for (int i = 0; i < len; i++ ) {
|
|
stretch_count++;
|
|
if (opt_stretch_amt != 0 && stretch_count >= opt_stretch_amt) {
|
|
stretch_count = 0;
|
|
if (opt_stretch_sign < 0)
|
|
// spill this samp
|
|
continue;
|
|
// repeat this samp
|
|
add_sample(samp[i]);
|
|
}
|
|
add_sample(samp[i]);
|
|
}
|
|
}
|
|
|
|
void
|
|
p25p1_voice_encode::set_gain_adjust(float gain_adjust) {
|
|
vocoder.set_gain_adjust(gain_adjust);
|
|
}
|
|
|
|
} /* namespace op25_repeater */
|
|
} /* namespace gr */
|