/*
 * Copyright (c) @ Regents of the University of California.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 	This product includes software developed by the MASH Research
 * 	Group at the University of California Berkeley.
 * 4. Neither the name of the University nor of the Research Group may be
 *    used to endorse or promote products derived from this software without
 *    specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char rcsid[] =
    "@(#) $Header: /cs/research/mice/starship/src/local/CVS_repository/vic/rtp/pktbuf-rtp.cpp,v 1.2 1999/12/15 17:16:42 piers Exp $";
#endif

//#include <tclcl.h>

#include "config.h"
#include "pktbuf-rtp.h"
#include "rtp.h"
#include "source.h"
#include "ntp-time.h"
#include "pktbuf.h"

/*static class RTP_BufferPoolClass : public TclClass {
public:
	RTP_BufferPoolClass() : TclClass("BufferPool/RTP") {}
	virtual TclObject* create(int argc, const char*const* argv) {
		return (new RTP_BufferPool);
	}
} rtp_bp_matcher;
	
/*
 *XXX
 * Sequence numbers are static so when we change the encoding (which causes
 * new encoder to be allocated) we don't reset the sequence counter.
 * Otherwise, receivers will get confused, reset their stats, and generate
 * odd looking streams of reception reports (i.e., the packet counts will
 * drop back to 0).
 */

RTP_BufferPool::RTP_BufferPool() : srcid_(-1)
{
	for (int i = 0; i < NLAYER; ++i)
		seqno_[i] = 1;
}		


int RTP_BufferPool::command(int argc, const char*const* argv)
{
	if (argc == 3) {
		if (strcmp(argv[1], "srcid") == 0) {
			srcid_ = htonl(strtoul(argv[2], 0, 10));
			return (TCL_OK);
		}
	}
	
	return (BufferPool::command(argc, argv));
}

void RTP_BufferPool::seqno(u_int16_t s)
{
	/*XXX*/
	for (int i = 0; i < NLAYER; ++i)
		seqno_[i] = s;
}

void RTP_BufferPool::initpkt(pktbuf *pb, u_int32_t ts, int fmt, int layer)
{
	pb->layer = layer;
	rtphdr* rh = (rtphdr*)pb->data;
	int flags = RTP_VERSION << 14 | fmt;
	rh->rh_flags = ntohs(flags);
	rh->rh_seqno = htons(seqno_[layer]);
	++seqno_[layer];
	rh->rh_ts = htonl(ts);
	//rh->rh_ssrc = srcid_;
	rh->rh_ssrc = SourceManager::instance().localsrc()->srcid();
}