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/* -*- c++ -*- */
/*
* Copyright 2009 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <missing_pkt_checker.h>
int
missing_pkt_checker::check(const vrt::expanded_header *hdr)
{
// FIXME assumes we're inspecting only a single stream
int nmissing = 0;
int actual = hdr->pkt_cnt();
int expected = (d_last_pkt_cnt + 1) & 0xf;
if (actual != expected && !d_resync){
d_nwrong_pkt_cnt++;
if (actual > expected)
nmissing = actual - expected;
else
nmissing = actual + 16 - expected;
d_nmissing_pkt_est += nmissing;
}
d_last_pkt_cnt = actual;
d_npackets++;
d_resync = false;
return nmissing;
}
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