adaptive-receiver.cc

Go to the documentation of this file.

/* -*-  Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*-
 *
 * Copyright (c) Xerox Corporation 1997. All rights reserved.
 *
 * This program 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 2 of the License, or (at your
 * option) any later version.
 *
 * This program 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 St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Linking this file statically or dynamically with other modules is making
 * a combined work based on this file.  Thus, the terms and conditions of
 * the GNU General Public License cover the whole combination.
 *
 * In addition, as a special exception, the copyright holders of this file
 * give you permission to combine this file with free software programs or
 * libraries that are released under the GNU LGPL and with code included in
 * the standard release of ns-2 under the Apache 2.0 license or under
 * otherwise-compatible licenses with advertising requirements (or modified
 * versions of such code, with unchanged license).  You may copy and
 * distribute such a system following the terms of the GNU GPL for this
 * file and the licenses of the other code concerned, provided that you
 * include the source code of that other code when and as the GNU GPL
 * requires distribution of source code.
 *
 * Note that people who make modified versions of this file are not
 * obligated to grant this special exception for their modified versions;
 * it is their choice whether to do so.  The GNU General Public License
 * gives permission to release a modified version without this exception;
 * this exception also makes it possible to release a modified version
 * which carries forward this exception.
 */

#ifndef lint
static const char rcsid[] =
    "@(#) $Header: /nfs/jade/vint/CVSROOT/ns-2/adc/adaptive-receiver.cc,v 1.8 2005/08/26 05:05:27 tomh Exp $";
#endif

#include "config.h"
#include "agent.h"
#include "tclcl.h"
#include "packet.h"
#include "ip.h"
#include "rtp.h"
#include "adaptive-receiver.h"
#include <math.h>

#define myabs(r) (r<0)?-r:r

AdaptiveRcvr::AdaptiveRcvr() : Agent(PT_NTYPE)
{
    //bind("npkts_",&npkts_);
    //bind("ndelay_",&ndelay_);
    //bind("nvar_",&nvar_);
}

void AdaptiveRcvr::recv(Packet *pkt,Handler*)
{
    int delay;
    int seq_no;
    hdr_cmn* ch= hdr_cmn::access(pkt);
    hdr_rtp *rh = hdr_rtp::access(pkt);
    
    seq_no= rh->seqno();
    register u_int32_t send_time = (int)ch->timestamp();
    
    u_int32_t local_time= (u_int32_t)(Scheduler::instance().clock() * SAMPLERATE);
    delay=adapt(pkt,local_time);
    Tcl::instance().evalf("%s print-delay-stats %f %f %f",name(),send_time/SAMPLERATE,local_time/SAMPLERATE,(local_time+delay)/SAMPLERATE);
    Packet::free(pkt);
}

---