/*  The oRTP LinPhone RTP library intends to provide basics for a RTP 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*//* this program shows how to receive streams in paralel using the SessionSet api 	and two threads only. */#include <ortp/ortp.h>#include <stdlib.h>#include <stdio.h>#include <assert.h>#ifndef _WIN32#include <signal.h>#include <sys/types.h>#include <sys/time.h>#include <unistd.h>#include <sys/stat.h>#include <fcntl.h>#else//#include <time.h>#endif#include <ortp/telephonyevents.h>int runcond=1;void stophandler(int signum){	runcond=0;}static int dtmf_tab[16]={'0','1','2','3','4','5','6','7','8','9','*','#','A','B','C','D'};static int *p_channel_id;int dtmf_count=0;static char *help="usage: tevmrtprecv	file_prefix local_port number_of_streams \n"		"Receives multiples rtp streams with telephone events on local_port+2*k, k={0..number_of_streams}\n";#define STREAMS_COUNT 1000void recv_tev_cb(RtpSession *session,int type,long user_data){        //printf("Receiving telephony event:%i\n",type);        if (type<16) printf("This is dtmf %c on channel %d\n",dtmf_tab[type],*(int *)user_data);        dtmf_count++;}int rtp2disk(RtpSession *session,uint32_t ts, int fd){	unsigned char buffer[160];	int err,havemore=1;	while (havemore){		err=rtp_session_recv_with_ts(session,buffer,160,ts,&havemore);		if (err>0){			rtp_session_set_data(session,(void*)1);			/* to indicate that (for the application) the stream has started, so we can start			recording on disk */		}		if (session->user_data != NULL) {			size_t ret = write(fd,buffer,err);			assert( ret == err );		}	}	return 0;}int main(int argc, char *argv[]){	RtpSession *session[STREAMS_COUNT];	int i;	int filefd[STREAMS_COUNT];	int port;	uint32_t user_ts=0;	int channels;	SessionSet *set;	char *filename;	if (argc<4){		printf(help);		return -1;	}		channels=atoi(argv[3]);	if (channels==0){		printf(help);		return -1;	}		ortp_init();	ortp_scheduler_init();	        /* set the telephony event payload type to 96 in the av profile.*/        rtp_profile_set_payload(&av_profile,96,&payload_type_telephone_event);	port=atoi(argv[2]);	p_channel_id = (int *)ortp_malloc(channels*sizeof(int));	for (i=0;i<channels;i++){		session[i]=rtp_session_new(RTP_SESSION_RECVONLY);			rtp_session_set_scheduling_mode(session[i],1);		rtp_session_set_blocking_mode(session[i],0);		rtp_session_set_local_addr(session[i],"0.0.0.0",port);		rtp_session_set_recv_payload_type(session[i],0);		rtp_session_set_recv_buf_size(session[i],256);		p_channel_id[i] = i;		/* register for telephony events */		rtp_session_signal_connect(session[i],"telephone-event",(RtpCallback)recv_tev_cb,(long)&p_channel_id[i]);		port+=2;	}			filename=ortp_malloc(strlen(argv[1])+8);	for (i=0;i<channels;i++){		sprintf(filename,"%s%4.4d.dat",argv[1],i);		#ifndef _WIN32		filefd[i]=open(filename,O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR|S_IWUSR|S_IRGRP|S_IWGRP);		#else		filefd[i]=open(filename,_O_BINARY | O_WRONLY | O_CREAT | O_TRUNC);		#endif		if (filefd[i]<0) ortp_error("Could not open %s for writing: %s",filename,strerror(errno));	}	signal(SIGINT,stophandler);	/* create a set */	set=session_set_new();	while(runcond)	{		int k;				for (k=0;k<channels;k++){			/* add the session to the set */			session_set_set(set,session[k]);					}		/* and then suspend the process by selecting() */		session_set_select(set,NULL,NULL);		for (k=0;k<channels;k++){			if (session_set_is_set(set,session[k])){				rtp2disk(session[k],user_ts,filefd[k]);			}		}		user_ts+=160;	}	for (i=0;i<channels;i++){		close(filefd[i]);		rtp_session_destroy(session[i]);	}	session_set_destroy(set);	ortp_free(p_channel_id);	ortp_free(filename);	ortp_exit();	ortp_global_stats_display();	return 0;}