text:   /*
    The oRTP library is an RTP (Realtime Transport Protocol - rfc3550) stack.
    Copyright (C) 2001  Simon MORLAT simon.morlat@linphone.org
  
    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.
  
    This library 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
    Lesser General Public License for more details.
  
    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
  
  #include <ortp/ortp.h>
  #include <signal.h>
  #include <stdlib.h>
  
  #ifndef _WIN32 
  #include <sys/types.h>
  #include <sys/time.h>
  #include <stdio.h>
  #endif
  
  int runcond=1;
  
  void stophandler(int signum)
  {
  	runcond=0;
  }
  
  static const char *help="usage: rtpsend	filename dest_ip4addr dest_port [ --with-clockslide <value> ] [ --with-jitter <milliseconds>]\n";
  
  int main(int argc, char *argv[])
  {
  	RtpSession *session;
  	unsigned char buffer[160];
  	int i;
  	FILE *infile;
  	char *ssrc;
  	uint32_t user_ts=0;
  	int clockslide=0;
  	int jitter=0;
  	if (argc<4){
  		printf("%s", help);
  		return -1;
  	}
  	for(i=4;i<argc;i++){
  		if (strcmp(argv[i],"--with-clockslide")==0){
  			i++;
  			if (i>=argc) {
  				printf("%s", help);
  				return -1;
  			}
  			clockslide=atoi(argv[i]);
  			ortp_message("Using clockslide of %i milisecond every 50 packets.",clockslide);
  		}else if (strcmp(argv[i],"--with-jitter")==0){
  			ortp_message("Jitter will be added to outgoing stream.");
  			i++;
  			if (i>=argc) {
  				printf("%s", help);
  				return -1;
  			}
  			jitter=atoi(argv[i]);
  		}
  	}
  	
  	ortp_init();
  	ortp_scheduler_init();
  	ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR);
  	session=rtp_session_new(RTP_SESSION_SENDONLY);	
  	
  	rtp_session_set_scheduling_mode(session,1);
  	rtp_session_set_blocking_mode(session,1);
  	rtp_session_set_connected_mode(session,TRUE);
  	rtp_session_set_remote_addr(session,argv[2],atoi(argv[3]));
  	rtp_session_set_payload_type(session,0);
  	
  	ssrc=getenv("SSRC");
  	if (ssrc!=NULL) {
  		printf("using SSRC=%i.\n",atoi(ssrc));
  		rtp_session_set_ssrc(session,atoi(ssrc));
  	}
  		
  	#ifndef _WIN32
  	infile=fopen(argv[1],"r");
  	#else
  	infile=fopen(argv[1],"rb");
  	#endif
  
  	if (infile==NULL) {
  		perror("Cannot open file");
  		return -1;
  	}
  
  	signal(SIGINT,stophandler);
  	while( ((i=fread(buffer,1,160,infile))>0) && (runcond) )
  	{
  		rtp_session_send_with_ts(session,buffer,i,user_ts);
  		user_ts+=160;
  		if (clockslide!=0 && user_ts%(160*50)==0){
  			ortp_message("Clock sliding of %i miliseconds now",clockslide);
  			rtp_session_make_time_distorsion(session,clockslide);
  		}
  		/*this will simulate a burst of late packets */
  		if (jitter && (user_ts%(8000)==0)) {
  			struct timespec pausetime, remtime;
  			ortp_message("Simulating late packets now (%i milliseconds)",jitter);
  			pausetime.tv_sec=jitter/1000;
  			pausetime.tv_nsec=(jitter%1000)*1000000;
  			while(nanosleep(&pausetime,&remtime)==-1 && errno==EINTR){
  				pausetime=remtime;
  			}
  		}
  	}
  
  	fclose(infile);
  	rtp_session_destroy(session);
  	ortp_exit();
  	ortp_global_stats_display();
  
  	return 0;
  }
  