/* $Id$ */
/* 
 * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com)
 * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org>
 *
 * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */


/**
 * \page page_pjmedia_samples_streamutil_c Samples: Remote Streaming
 *
 * This example mainly demonstrates how to stream media file to remote
 * peer using RTP.
 *
 * This file is pjsip-apps/src/samples/streamutil.c
 *
 * \includelineno streamutil.c
 */

#include <pjlib.h>
#include <pjlib-util.h>
#include <pjmedia.h>
#include <pjmedia-codec.h>
#include <pjmedia/transport_srtp.h>

#include <stdlib.h>	/* atoi() */
#include <stdio.h>

#include "util.h"

/* An experimental feature to add multicast option to this app for providing
 * the capability to send IP datagrams from a single source to more than
 * one receivers.
 */
#define HAVE_MULTICAST 1

static const char *desc = 
 " streamutil								\n"
 "									\n"
 " PURPOSE:								\n"
 "  Demonstrate how to use pjmedia stream component to transmit/receive \n"
 "  RTP packets to/from sound device.		    			\n"
 "\n"
 "\n"
 " USAGE:								\n"
 "  streamutil [options]                                                \n"
 "\n"
 "\n"
 " Options:\n"
 "  --codec=CODEC         Set the codec name.                           \n"
 "  --local-port=PORT     Set local RTP port (default=4000)		\n"
 "  --remote=IP:PORT      Set the remote peer. If this option is set,	\n"
 "                        the program will transmit RTP audio to the	\n"
 "                        specified address. (default: recv only)	\n"
#if HAVE_MULTICAST
 "  --mcast-add=IP   	  Joins the multicast group as specified by     \n"
 "                        the address. Sample usage:			\n"
 "			  Sender:					\n"
 "			  streamutil --remote=[multicast_addr]:[port] 	\n"
 "			  Receivers:					\n"
 "			  streamutil --local-port=[port]		\n"
 "				     --mcast-add=[multicast_addr]	\n"
#endif
 "  --play-file=WAV       Send audio from the WAV file instead of from	\n"
 "                        the sound device.				\n"
 "  --record-file=WAV     Record incoming audio to WAV file instead of	\n"
 "                        playing it to sound device.			\n"
 "  --send-recv           Set stream direction to bidirectional.        \n"
 "  --send-only           Set stream direction to send only		\n"
 "  --recv-only           Set stream direction to recv only (default)   \n"

#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
 "  --use-srtp[=NAME]     Enable SRTP with crypto suite NAME            \n"
 "                        e.g: AES_CM_128_HMAC_SHA1_80 (default),       \n"
 "                             AES_CM_128_HMAC_SHA1_32                  \n"
 "                        Use this option along with the TX & RX keys,  \n"
 "                        formated of 60 hex digits (e.g: E148DA..)     \n"
 "  --srtp-tx-key         SRTP key for transmiting                      \n"
 "  --srtp-rx-key         SRTP key for receiving                        \n"
 "  --srtp-dtls-client    Use DTLS for SRTP keying, as DTLS client      \n"
 "  --srtp-dtls-server    Use DTLS for SRTP keying, as DTLS server      \n"
#endif

 "\n"
;




#define THIS_FILE	"stream.c"



/* Prototype */
static void print_stream_stat(pjmedia_stream *stream, 
			      const pjmedia_codec_param *codec_param);

/* Hexa string to octet array */
int my_hex_string_to_octet_string(char *raw, char *hex, int len)
{
    int i;
    for (i = 0; i < len; i+=2) {
	int tmp;
	if (i+1 >= len || !pj_isxdigit(hex[i]) || !pj_isxdigit(hex[i+1]))
	    return i;
	tmp  = pj_hex_digit_to_val((unsigned char)hex[i]) << 4;
	tmp |= pj_hex_digit_to_val((unsigned char)hex[i+1]);
	raw[i/2] = (char)(tmp & 0xFF);
    }
    return len;
}

/* 
 * Register all codecs. 
 */
static pj_status_t init_codecs(pjmedia_endpt *med_endpt)
{
    return pjmedia_codec_register_audio_codecs(med_endpt, NULL);
}


/* 
 * Create stream based on the codec, dir, remote address, etc. 
 */
static pj_status_t create_stream( pj_pool_t *pool,
				  pjmedia_endpt *med_endpt,
				  const pjmedia_codec_info *codec_info,
				  pjmedia_dir dir,
				  pj_uint16_t local_port,
				  const pj_sockaddr_in *rem_addr,
				  pj_bool_t mcast,
				  const pj_sockaddr_in *mcast_addr,
#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
				  pj_bool_t use_srtp,
				  const pj_str_t *crypto_suite,
				  const pj_str_t *srtp_tx_key,
				  const pj_str_t *srtp_rx_key,
				  pj_bool_t is_dtls_client,
				  pj_bool_t is_dtls_server,
#endif
				  pjmedia_stream **p_stream )
{
    pjmedia_stream_info info;
    pjmedia_transport *transport = NULL;
    pj_status_t status;
#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
    pjmedia_transport *srtp_tp = NULL;
#endif


    /* Reset stream info. */
    pj_bzero(&info, sizeof(info));


    /* Initialize stream info formats */
    info.type = PJMEDIA_TYPE_AUDIO;
    info.dir = dir;
    pj_memcpy(&info.fmt, codec_info, sizeof(pjmedia_codec_info));
    info.tx_pt = codec_info->pt;
    info.rx_pt = codec_info->pt;
    info.ssrc = pj_rand();
    
#if PJMEDIA_HAS_RTCP_XR && PJMEDIA_STREAM_ENABLE_XR
    /* Set default RTCP XR enabled/disabled */
    info.rtcp_xr_enabled = PJ_TRUE;
#endif

    /* Copy remote address */
    pj_memcpy(&info.rem_addr, rem_addr, sizeof(pj_sockaddr_in));

    /* If remote address is not set, set to an arbitrary address
     * (otherwise stream will assert).
     */
    if (info.rem_addr.addr.sa_family == 0) {
	const pj_str_t addr = pj_str("127.0.0.1");
	pj_sockaddr_in_init(&info.rem_addr.ipv4, &addr, 0);
    }

    pj_sockaddr_cp(&info.rem_rtcp, &info.rem_addr);
    pj_sockaddr_set_port(&info.rem_rtcp,
    			 pj_sockaddr_get_port(&info.rem_rtcp)+1);

    if (mcast) {
     	pjmedia_sock_info si;
    	int reuse = 1;

    	pj_bzero(&si, sizeof(pjmedia_sock_info));
    	si.rtp_sock = si.rtcp_sock = PJ_INVALID_SOCKET;

    	/* Create RTP socket */
    	status = pj_sock_socket(pj_AF_INET(), pj_SOCK_DGRAM(), 0,
    				&si.rtp_sock);
    	if (status != PJ_SUCCESS)
	    return status;

    	status = pj_sock_setsockopt(si.rtp_sock, pj_SOL_SOCKET(),
    				    pj_SO_REUSEADDR(), &reuse, sizeof(reuse));
    	if (status != PJ_SUCCESS)
    	    return status;

    	/* Bind RTP socket */
    	status = pj_sockaddr_init(pj_AF_INET(), &si.rtp_addr_name,
    				  NULL, local_port);
    	if (status != PJ_SUCCESS)
	    return status;
    
        status = pj_sock_bind(si.rtp_sock, &si.rtp_addr_name,
			      pj_sockaddr_get_len(&si.rtp_addr_name));
    	if (status != PJ_SUCCESS)
	    return status;

    	/* Create RTCP socket */
    	status = pj_sock_socket(pj_AF_INET(), pj_SOCK_DGRAM(), 0,
    				&si.rtcp_sock);
    	if (status != PJ_SUCCESS)
	    return status;

    	status = pj_sock_setsockopt(si.rtcp_sock, pj_SOL_SOCKET(),
    				    pj_SO_REUSEADDR(), &reuse, sizeof(reuse));
    	if (status != PJ_SUCCESS)
    	    return status;

    	/* Bind RTCP socket */
    	status = pj_sockaddr_init(pj_AF_INET(), &si.rtcp_addr_name,
    				  NULL, local_port+1);
    	if (status != PJ_SUCCESS)
	    return status;
    
    	status = pj_sock_bind(si.rtcp_sock, &si.rtcp_addr_name,
                              pj_sockaddr_get_len(&si.rtcp_addr_name));
    	if (status != PJ_SUCCESS)
	    return status;

#ifdef HAVE_MULTICAST
	{
	    unsigned char loop;
	    struct pj_ip_mreq imr;
	
	    pj_memset(&imr, 0, sizeof(struct pj_ip_mreq));
	    imr.imr_multiaddr.s_addr = mcast_addr->sin_addr.s_addr;
	    imr.imr_interface.s_addr = pj_htonl(PJ_INADDR_ANY);
	    status = pj_sock_setsockopt(si.rtp_sock, pj_SOL_IP(),
	    				pj_IP_ADD_MEMBERSHIP(),
				   	&imr, sizeof(struct pj_ip_mreq));
	    if (status != PJ_SUCCESS)
	    	return status;

	    status = pj_sock_setsockopt(si.rtcp_sock, pj_SOL_IP(),
	    				pj_IP_ADD_MEMBERSHIP(),
				   	&imr, sizeof(struct pj_ip_mreq));
	    if (status != PJ_SUCCESS)
	    	return status;

	    /* Disable local reception of local sent packets */
	    loop = 0;
	    pj_sock_setsockopt(si.rtp_sock, pj_SOL_IP(),
	    		       pj_IP_MULTICAST_LOOP(), &loop, sizeof(loop));
	    pj_sock_setsockopt(si.rtcp_sock, pj_SOL_IP(),
	    		       pj_IP_MULTICAST_LOOP(), &loop, sizeof(loop));
	}
#endif
	
    	/* Create media transport from existing sockets */
    	status = pjmedia_transport_udp_attach( med_endpt, NULL, &si, 
				PJMEDIA_UDP_NO_SRC_ADDR_CHECKING, &transport);
    	if (status != PJ_SUCCESS)
	    return status;	
	
    } else {
        /* Create media transport */
        status = pjmedia_transport_udp_create(med_endpt, NULL, local_port,
					      0, &transport);
        if (status != PJ_SUCCESS)
	    return status;
    }

#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
    /* Check if SRTP enabled */
    if (use_srtp) {
	status = pjmedia_transport_srtp_create(med_endpt, transport, 
					       NULL, &srtp_tp);
	if (status != PJ_SUCCESS)
	    return status;

	if (is_dtls_client || is_dtls_server) {
	    char fp[128];
	    pj_size_t fp_len = sizeof(fp);
	    pjmedia_srtp_dtls_nego_param dtls_param;
	    
	    pjmedia_transport_srtp_dtls_get_fingerprint(srtp_tp, "SHA-256", fp, &fp_len);
	    PJ_LOG(3, (THIS_FILE, "Local cert fingerprint: %s", fp));

	    pj_bzero(&dtls_param, sizeof(dtls_param));
	    pj_sockaddr_cp(&dtls_param.rem_addr, rem_addr);
	    pj_sockaddr_cp(&dtls_param.rem_rtcp, rem_addr);
	    dtls_param.is_role_active = is_dtls_client;

	    status = pjmedia_transport_srtp_dtls_start_nego(srtp_tp, &dtls_param);
	    if (status != PJ_SUCCESS)
		return status;
	} else {
	    pjmedia_srtp_crypto tx_plc, rx_plc;

	    pj_bzero(&tx_plc, sizeof(pjmedia_srtp_crypto));
	    pj_bzero(&rx_plc, sizeof(pjmedia_srtp_crypto));

	    tx_plc.key = *srtp_tx_key;
	    tx_plc.name = *crypto_suite;
	    rx_plc.key = *srtp_rx_key;
	    rx_plc.name = *crypto_suite;
    	
	    status = pjmedia_transport_srtp_start(srtp_tp, &tx_plc, &rx_plc);
	    if (status != PJ_SUCCESS)
		return status;
	}

	transport = srtp_tp;
    }
#endif

    /* Now that the stream info is initialized, we can create the 
     * stream.
     */

    status = pjmedia_stream_create( med_endpt, pool, &info, 
				    transport, 
				    NULL, p_stream);

    if (status != PJ_SUCCESS) {
	app_perror(THIS_FILE, "Error creating stream", status);
	pjmedia_transport_close(transport);
	return status;
    }

    /* Start media transport */
    pjmedia_transport_media_start(transport, 0, 0, 0, 0);


    return PJ_SUCCESS;
}


/*
 * usage()
 */
static void usage()
{
    puts(desc);
}

/*
 * main()
 */
int main(int argc, char *argv[])
{
    pj_caching_pool cp;
    pjmedia_endpt *med_endpt;
    pj_pool_t *pool;
    pjmedia_port *rec_file_port = NULL, *play_file_port = NULL;
    pjmedia_master_port *master_port = NULL;
    pjmedia_snd_port *snd_port = NULL;
    pjmedia_stream *stream = NULL;
    pjmedia_port *stream_port;
    char tmp[10];
    char addr[PJ_INET_ADDRSTRLEN];
    pj_status_t status; 

#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
    /* SRTP variables */
    pj_bool_t use_srtp = PJ_FALSE;
    char tmp_tx_key[64];
    char tmp_rx_key[64];
    pj_str_t  srtp_tx_key = {NULL, 0};
    pj_str_t  srtp_rx_key = {NULL, 0};
    pj_str_t  srtp_crypto_suite = {NULL, 0};
    pj_bool_t is_dtls_client = PJ_FALSE;
    pj_bool_t is_dtls_server = PJ_FALSE;
    int	tmp_key_len;
#endif

    /* Default values */
    const pjmedia_codec_info *codec_info;
    pjmedia_codec_param codec_param;
    pjmedia_dir dir = PJMEDIA_DIR_DECODING;
    pj_sockaddr_in remote_addr;
    pj_sockaddr_in mcast_addr;
    pj_uint16_t local_port = 4000;
    char *codec_id = NULL;
    char *rec_file = NULL;
    char *play_file = NULL;
    int mcast = 0;

    enum {
	OPT_CODEC	= 'c',
	OPT_LOCAL_PORT	= 'p',
	OPT_REMOTE	= 'r',
	OPT_MCAST	= 'm',
	OPT_PLAY_FILE	= 'w',
	OPT_RECORD_FILE	= 'R',
	OPT_SEND_RECV	= 'b',
	OPT_SEND_ONLY	= 's',
	OPT_RECV_ONLY	= 'i',
#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
	OPT_USE_SRTP	= 'S',
#endif
	OPT_SRTP_TX_KEY	= 'x',
	OPT_SRTP_RX_KEY	= 'y',
	OPT_SRTP_DTLS_CLIENT = 'd',
	OPT_SRTP_DTLS_SERVER = 'D',
	OPT_HELP	= 'h',
    };

    struct pj_getopt_option long_options[] = {
	{ "codec",	    1, 0, OPT_CODEC },
	{ "local-port",	    1, 0, OPT_LOCAL_PORT },
	{ "remote",	    1, 0, OPT_REMOTE },
	{ "mcast-add",	    1, 0, OPT_MCAST },
	{ "play-file",	    1, 0, OPT_PLAY_FILE },
	{ "record-file",    1, 0, OPT_RECORD_FILE },
	{ "send-recv",      0, 0, OPT_SEND_RECV },
	{ "send-only",      0, 0, OPT_SEND_ONLY },
	{ "recv-only",      0, 0, OPT_RECV_ONLY },
#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
	{ "use-srtp",	    2, 0, OPT_USE_SRTP },
	{ "srtp-tx-key",    1, 0, OPT_SRTP_TX_KEY },
	{ "srtp-rx-key",    1, 0, OPT_SRTP_RX_KEY },
	{ "srtp-dtls-client", 0, 0, OPT_SRTP_DTLS_CLIENT },
	{ "srtp-dtls-server", 0, 0, OPT_SRTP_DTLS_SERVER },
#endif
	{ "help",	    0, 0, OPT_HELP },
	{ NULL, 0, 0, 0 },
    };

    int c;
    int option_index;


    pj_bzero(&remote_addr, sizeof(remote_addr));


    /* init PJLIB : */
    status = pj_init();
    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);


    /* Parse arguments */
    pj_optind = 0;
    while((c=pj_getopt_long(argc,argv, "h", long_options, &option_index))!=-1) {

	switch (c) {
	case OPT_CODEC:
	    codec_id = pj_optarg;
	    break;

	case OPT_LOCAL_PORT:
	    local_port = (pj_uint16_t) atoi(pj_optarg);
	    if (local_port < 1) {
		printf("Error: invalid local port %s\n", pj_optarg);
		return 1;
	    }
	    break;

	case OPT_REMOTE:
	    {
		pj_str_t ip = pj_str(strtok(pj_optarg, ":"));
		pj_uint16_t port = (pj_uint16_t) atoi(strtok(NULL, ":"));

		status = pj_sockaddr_in_init(&remote_addr, &ip, port);
		if (status != PJ_SUCCESS) {
		    app_perror(THIS_FILE, "Invalid remote address", status);
		    return 1;
		}
	    }
	    break;

	case OPT_MCAST:
	    {
	    	pj_str_t ip = pj_str(pj_optarg);

	    	mcast = 1;
		status = pj_sockaddr_in_init(&mcast_addr, &ip, 0);
		if (status != PJ_SUCCESS) {
		    app_perror(THIS_FILE, "Invalid mcast address", status);
		    return 1;
		}
	    }
	    break;

	case OPT_PLAY_FILE:
	    play_file = pj_optarg;
	    break;

	case OPT_RECORD_FILE:
	    rec_file = pj_optarg;
	    break;

	case OPT_SEND_RECV:
	    dir = PJMEDIA_DIR_ENCODING_DECODING;
	    break;

	case OPT_SEND_ONLY:
	    dir = PJMEDIA_DIR_ENCODING;
	    break;

	case OPT_RECV_ONLY:
	    dir = PJMEDIA_DIR_DECODING;
	    break;

#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
	case OPT_USE_SRTP:
	    use_srtp = PJ_TRUE;
	    if (pj_optarg) {
		pj_strset(&srtp_crypto_suite, pj_optarg, strlen(pj_optarg));
	    } else {
		srtp_crypto_suite = pj_str("AES_CM_128_HMAC_SHA1_80");
	    }
	    break;

	case OPT_SRTP_TX_KEY:
	    tmp_key_len = my_hex_string_to_octet_string(tmp_tx_key, pj_optarg, 
						        (int)strlen(pj_optarg));
	    pj_strset(&srtp_tx_key, tmp_tx_key, tmp_key_len/2);
	    break;

	case OPT_SRTP_RX_KEY:
	    tmp_key_len = my_hex_string_to_octet_string(tmp_rx_key, pj_optarg, 
						        (int)strlen(pj_optarg));
	    pj_strset(&srtp_rx_key, tmp_rx_key, tmp_key_len/2);
	    break;
	case OPT_SRTP_DTLS_CLIENT:
	    is_dtls_client = PJ_TRUE;
	    if (is_dtls_server) {
		printf("Error: Cannot be as both DTLS server & client\n");
		return 1;
	    }
	    break;
	case OPT_SRTP_DTLS_SERVER:
	    is_dtls_server = PJ_TRUE;
	    if (is_dtls_client) {
		printf("Error: Cannot be as both DTLS server & client\n");
		return 1;
	    }
	    break;
#endif

	case OPT_HELP:
	    usage();
	    return 1;

	default:
	    printf("Invalid options %s\n", argv[pj_optind]);
	    return 1;
	}

    }


    /* Verify arguments. */
    if (dir & PJMEDIA_DIR_ENCODING
#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
        || is_dtls_client || is_dtls_server
#endif
       ) {
	if (remote_addr.sin_addr.s_addr == 0) {
	    printf("Error: remote address must be set\n");
	    return 1;
	}
    }

    if (play_file != NULL && dir != PJMEDIA_DIR_ENCODING) {
	printf("Direction is set to --send-only because of --play-file\n");
	dir = PJMEDIA_DIR_ENCODING;
    }

#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
    /* SRTP validation */
    if (use_srtp) {
	if (!is_dtls_client && !is_dtls_server && 
	    (!srtp_tx_key.slen || !srtp_rx_key.slen))
	{
	    printf("Error: Key for each SRTP stream direction must be set\n");
	    return 1;
	}
    }
#endif

    /* Must create a pool factory before we can allocate any memory. */
    pj_caching_pool_init(&cp, &pj_pool_factory_default_policy, 0);

    /* 
     * Initialize media endpoint.
     * This will implicitly initialize PJMEDIA too.
     */
    status = pjmedia_endpt_create(&cp.factory, NULL, 1, &med_endpt);
    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);

    /* Create memory pool for application purpose */
    pool = pj_pool_create( &cp.factory,	    /* pool factory	    */
			   "app",	    /* pool name.	    */
			   4000,	    /* init size	    */
			   4000,	    /* increment size	    */
			   NULL		    /* callback on error    */
			   );


    /* Register all supported codecs */
    status = init_codecs(med_endpt);
    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);


    /* Find which codec to use. */
    if (codec_id) {
	unsigned count = 1;
	pj_str_t str_codec_id = pj_str(codec_id);
	pjmedia_codec_mgr *codec_mgr = pjmedia_endpt_get_codec_mgr(med_endpt);
	status = pjmedia_codec_mgr_find_codecs_by_id( codec_mgr,
						      &str_codec_id, &count,
						      &codec_info, NULL);
	if (status != PJ_SUCCESS) {
	    printf("Error: unable to find codec %s\n", codec_id);
	    return 1;
	}
    } else {
	/* Default to pcmu */
	pjmedia_codec_mgr_get_codec_info( pjmedia_endpt_get_codec_mgr(med_endpt),
					  0, &codec_info);
    }

    /* Create event manager */
    status = pjmedia_event_mgr_create(pool, 0, NULL);
    if (status != PJ_SUCCESS)
	goto on_exit;

    /* Create stream based on program arguments */
    status = create_stream(pool, med_endpt, codec_info, dir, local_port, 
			   &remote_addr, mcast, &mcast_addr,
#if defined(PJMEDIA_HAS_SRTP) && (PJMEDIA_HAS_SRTP != 0)
			   use_srtp, &srtp_crypto_suite, 
			   &srtp_tx_key, &srtp_rx_key,
			   is_dtls_client, is_dtls_server,
#endif
			   &stream);
    if (status != PJ_SUCCESS)
	goto on_exit;

    /* Get codec default param for info */
    status = pjmedia_codec_mgr_get_default_param(
				    pjmedia_endpt_get_codec_mgr(med_endpt), 
				    codec_info, 
				    &codec_param);
    /* Should be ok, as create_stream() above succeeded */
    pj_assert(status == PJ_SUCCESS);

    /* Get the port interface of the stream */
    status = pjmedia_stream_get_port( stream, &stream_port);
    PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);


    if (play_file) {
	unsigned wav_ptime;

	wav_ptime = PJMEDIA_PIA_PTIME(&stream_port->info);
	status = pjmedia_wav_player_port_create(pool, play_file, wav_ptime,
						0, -1, &play_file_port);
	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Unable to use file", status);
	    goto on_exit;
	}

	status = pjmedia_master_port_create(pool, play_file_port, stream_port,
					    0, &master_port);
	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Unable to create master port", status);
	    goto on_exit;
	}

	status = pjmedia_master_port_start(master_port);
	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Error starting master port", status);
	    goto on_exit;
	}

	printf("Playing from WAV file %s..\n", play_file);

    } else if (rec_file) {

	status = pjmedia_wav_writer_port_create(pool, rec_file,
					        PJMEDIA_PIA_SRATE(&stream_port->info),
					        PJMEDIA_PIA_CCNT(&stream_port->info),
					        PJMEDIA_PIA_SPF(&stream_port->info),
					        PJMEDIA_PIA_BITS(&stream_port->info),
						0, 0, &rec_file_port);
	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Unable to use file", status);
	    goto on_exit;
	}

	status = pjmedia_master_port_create(pool, stream_port, rec_file_port, 
					    0, &master_port);
	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Unable to create master port", status);
	    goto on_exit;
	}

	status = pjmedia_master_port_start(master_port);
	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Error starting master port", status);
	    goto on_exit;
	}

	printf("Recording to WAV file %s..\n", rec_file);
	
    } else {

	/* Create sound device port. */
	if (dir == PJMEDIA_DIR_ENCODING_DECODING)
	    status = pjmedia_snd_port_create(pool, -1, -1, 
					PJMEDIA_PIA_SRATE(&stream_port->info),
					PJMEDIA_PIA_CCNT(&stream_port->info),
					PJMEDIA_PIA_SPF(&stream_port->info),
					PJMEDIA_PIA_BITS(&stream_port->info),
					0, &snd_port);
	else if (dir == PJMEDIA_DIR_ENCODING)
	    status = pjmedia_snd_port_create_rec(pool, -1, 
					PJMEDIA_PIA_SRATE(&stream_port->info),
					PJMEDIA_PIA_CCNT(&stream_port->info),
					PJMEDIA_PIA_SPF(&stream_port->info),
					PJMEDIA_PIA_BITS(&stream_port->info),
					0, &snd_port);
	else
	    status = pjmedia_snd_port_create_player(pool, -1, 
					PJMEDIA_PIA_SRATE(&stream_port->info),
					PJMEDIA_PIA_CCNT(&stream_port->info),
					PJMEDIA_PIA_SPF(&stream_port->info),
					PJMEDIA_PIA_BITS(&stream_port->info),
					0, &snd_port);


	if (status != PJ_SUCCESS) {
	    app_perror(THIS_FILE, "Unable to create sound port", status);
	    goto on_exit;
	}

	/* Connect sound port to stream */
	status = pjmedia_snd_port_connect( snd_port, stream_port );
	PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);

    }

    /* Start streaming */
    pjmedia_stream_start(stream);


    /* Done */

    if (dir == PJMEDIA_DIR_DECODING)
	printf("Stream is active, dir is recv-only, local port is %d\n",
	       local_port);
    else if (dir == PJMEDIA_DIR_ENCODING)
	printf("Stream is active, dir is send-only, sending to %s:%d\n",
	       pj_inet_ntop2(pj_AF_INET(), &remote_addr.sin_addr, addr,
        		     sizeof(addr)),
	       pj_ntohs(remote_addr.sin_port));
    else
	printf("Stream is active, send/recv, local port is %d, "
	       "sending to %s:%d\n",
	       local_port,
	       pj_inet_ntop2(pj_AF_INET(), &remote_addr.sin_addr, addr,
        		     sizeof(addr)),
	       pj_ntohs(remote_addr.sin_port));


    for (;;) {

	puts("");
	puts("Commands:");
	puts("  s     Display media statistics");
	puts("  q     Quit");
	puts("");

	printf("Command: "); fflush(stdout);

	if (fgets(tmp, sizeof(tmp), stdin) == NULL) {
	    puts("EOF while reading stdin, will quit now..");
	    break;
	}

	if (tmp[0] == 's')
	    print_stream_stat(stream, &codec_param);
	else if (tmp[0] == 'q')
	    break;

    }



    /* Start deinitialization: */
on_exit:

    /* Destroy sound device */
    if (snd_port) {
	pjmedia_snd_port_destroy( snd_port );
	PJ_ASSERT_RETURN(status == PJ_SUCCESS, 1);
    }

    /* If there is master port, then we just need to destroy master port
     * (it will recursively destroy upstream and downstream ports, which
     * in this case are file_port and stream_port).
     */
    if (master_port) {
	pjmedia_master_port_destroy(master_port, PJ_TRUE);
	play_file_port = NULL;
	stream = NULL;
    }

    /* Destroy stream */
    if (stream) {
	pjmedia_transport *tp;

	tp = pjmedia_stream_get_transport(stream);
	pjmedia_stream_destroy(stream);
	
	pjmedia_transport_media_stop(tp);
	pjmedia_transport_close(tp);
    }

    /* Destroy file ports */
    if (play_file_port)
	pjmedia_port_destroy( play_file_port );
    if (rec_file_port)
	pjmedia_port_destroy( rec_file_port );

    /* Destroy event manager */
    pjmedia_event_mgr_destroy(NULL);

    /* Release application pool */
    pj_pool_release( pool );

    /* Destroy media endpoint. */
    pjmedia_endpt_destroy( med_endpt );

    /* Destroy pool factory */
    pj_caching_pool_destroy( &cp );

    /* Shutdown PJLIB */
    pj_shutdown();


    return (status == PJ_SUCCESS) ? 0 : 1;
}




static const char *good_number(char *buf, pj_int32_t val)
{
    if (val < 1000) {
	pj_ansi_sprintf(buf, "%d", val);
    } else if (val < 1000000) {
	pj_ansi_sprintf(buf, "%d.%dK", 
			val / 1000,
			(val % 1000) / 100);
    } else {
	pj_ansi_sprintf(buf, "%d.%02dM", 
			val / 1000000,
			(val % 1000000) / 10000);
    }

    return buf;
}


#define SAMPLES_TO_USEC(usec, samples, clock_rate) \
    do { \
	if (samples <= 4294) \
	    usec = samples * 1000000 / clock_rate; \
	else { \
	    usec = samples * 1000 / clock_rate; \
	    usec *= 1000; \
	} \
    } while(0)

#define PRINT_VOIP_MTC_VAL(s, v) \
    if (v == 127) \
	sprintf(s, "(na)"); \
    else \
	sprintf(s, "%d", v)


/*
 * Print stream statistics
 */
static void print_stream_stat(pjmedia_stream *stream,
			      const pjmedia_codec_param *codec_param)
{
    char duration[80], last_update[80];
    char bps[16], ipbps[16], packets[16], bytes[16], ipbytes[16];
    pjmedia_port *port;
    pjmedia_rtcp_stat stat;
    pj_time_val now;


    pj_gettimeofday(&now);
    pjmedia_stream_get_stat(stream, &stat);
    pjmedia_stream_get_port(stream, &port);

    puts("Stream statistics:");

    /* Print duration */
    PJ_TIME_VAL_SUB(now, stat.start);
    sprintf(duration, " Duration: %02ld:%02ld:%02ld.%03ld",
	    now.sec / 3600,
	    (now.sec % 3600) / 60,
	    (now.sec % 60),
	    now.msec);


    printf(" Info: audio %dHz, %dms/frame, %sB/s (%sB/s +IP hdr)\n",
	PJMEDIA_PIA_SRATE(&port->info),
	PJMEDIA_PIA_PTIME(&port->info),
	good_number(bps, (codec_param->info.avg_bps+7)/8),
	good_number(ipbps, ((codec_param->info.avg_bps+7)/8) + 
			   (40 * 1000 /
			    codec_param->setting.frm_per_pkt /
			    codec_param->info.frm_ptime)));

    if (stat.rx.update_cnt == 0)
	strcpy(last_update, "never");
    else {
	pj_gettimeofday(&now);
	PJ_TIME_VAL_SUB(now, stat.rx.update);
	sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
		now.sec / 3600,
		(now.sec % 3600) / 60,
		now.sec % 60,
		now.msec);
    }

    printf(" RX stat last update: %s\n"
	   "    total %s packets %sB received (%sB +IP hdr)%s\n"
	   "    pkt loss=%d (%3.1f%%), dup=%d (%3.1f%%), reorder=%d (%3.1f%%)%s\n"
	   "          (msec)    min     avg     max     last    dev\n"
	   "    loss period: %7.3f %7.3f %7.3f %7.3f %7.3f%s\n"
	   "    jitter     : %7.3f %7.3f %7.3f %7.3f %7.3f%s\n",
	   last_update,
	   good_number(packets, stat.rx.pkt),
	   good_number(bytes, stat.rx.bytes),
	   good_number(ipbytes, stat.rx.bytes + stat.rx.pkt * 32),
	   "",
	   stat.rx.loss,
	   stat.rx.loss * 100.0 / (stat.rx.pkt + stat.rx.loss),
	   stat.rx.dup, 
	   stat.rx.dup * 100.0 / (stat.rx.pkt + stat.rx.loss),
	   stat.rx.reorder, 
	   stat.rx.reorder * 100.0 / (stat.rx.pkt + stat.rx.loss),
	   "",
	   stat.rx.loss_period.min / 1000.0, 
	   stat.rx.loss_period.mean / 1000.0, 
	   stat.rx.loss_period.max / 1000.0,
	   stat.rx.loss_period.last / 1000.0,
	   pj_math_stat_get_stddev(&stat.rx.loss_period) / 1000.0,
	   "",
	   stat.rx.jitter.min / 1000.0,
	   stat.rx.jitter.mean / 1000.0,
	   stat.rx.jitter.max / 1000.0,
	   stat.rx.jitter.last / 1000.0,
	   pj_math_stat_get_stddev(&stat.rx.jitter) / 1000.0,
	   ""
	   );


    if (stat.tx.update_cnt == 0)
	strcpy(last_update, "never");
    else {
	pj_gettimeofday(&now);
	PJ_TIME_VAL_SUB(now, stat.tx.update);
	sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
		now.sec / 3600,
		(now.sec % 3600) / 60,
		now.sec % 60,
		now.msec);
    }

    printf(" TX stat last update: %s\n"
	   "    total %s packets %sB sent (%sB +IP hdr)%s\n"
	   "    pkt loss=%d (%3.1f%%), dup=%d (%3.1f%%), reorder=%d (%3.1f%%)%s\n"
	   "          (msec)    min     avg     max     last    dev\n"
	   "    loss period: %7.3f %7.3f %7.3f %7.3f %7.3f%s\n"
	   "    jitter     : %7.3f %7.3f %7.3f %7.3f %7.3f%s\n",
	   last_update,
	   good_number(packets, stat.tx.pkt),
	   good_number(bytes, stat.tx.bytes),
	   good_number(ipbytes, stat.tx.bytes + stat.tx.pkt * 32),
	   "",
	   stat.tx.loss,
	   stat.tx.loss * 100.0 / (stat.tx.pkt + stat.tx.loss),
	   stat.tx.dup, 
	   stat.tx.dup * 100.0 / (stat.tx.pkt + stat.tx.loss),
	   stat.tx.reorder, 
	   stat.tx.reorder * 100.0 / (stat.tx.pkt + stat.tx.loss),
	   "",
	   stat.tx.loss_period.min / 1000.0, 
	   stat.tx.loss_period.mean / 1000.0, 
	   stat.tx.loss_period.max / 1000.0,
	   stat.tx.loss_period.last / 1000.0,
	   pj_math_stat_get_stddev(&stat.tx.loss_period) / 1000.0,
	   "",
	   stat.tx.jitter.min / 1000.0,
	   stat.tx.jitter.mean / 1000.0,
	   stat.tx.jitter.max / 1000.0,
	   stat.tx.jitter.last / 1000.0,
	   pj_math_stat_get_stddev(&stat.tx.jitter) / 1000.0,
	   ""
	   );


    printf(" RTT delay     : %7.3f %7.3f %7.3f %7.3f %7.3f%s\n", 
	   stat.rtt.min / 1000.0,
	   stat.rtt.mean / 1000.0,
	   stat.rtt.max / 1000.0,
	   stat.rtt.last / 1000.0,
	   pj_math_stat_get_stddev(&stat.rtt) / 1000.0,
	   ""
	   );

#if defined(PJMEDIA_HAS_RTCP_XR) && (PJMEDIA_HAS_RTCP_XR != 0)
    /* RTCP XR Reports */
    do {
	char loss[16], dup[16];
	char jitter[80];
	char toh[80];
	char plc[16], jba[16], jbr[16];
	char signal_lvl[16], noise_lvl[16], rerl[16];
	char r_factor[16], ext_r_factor[16], mos_lq[16], mos_cq[16];
	pjmedia_rtcp_xr_stat xr_stat;

	if (pjmedia_stream_get_stat_xr(stream, &xr_stat) != PJ_SUCCESS)
	    break;

	puts("\nExtended reports:");

	/* Statistics Summary */
	puts(" Statistics Summary");

	if (xr_stat.rx.stat_sum.l)
	    sprintf(loss, "%d", xr_stat.rx.stat_sum.lost);
	else
	    sprintf(loss, "(na)");

	if (xr_stat.rx.stat_sum.d)
	    sprintf(dup, "%d", xr_stat.rx.stat_sum.dup);
	else
	    sprintf(dup, "(na)");

	if (xr_stat.rx.stat_sum.j) {
	    unsigned jmin, jmax, jmean, jdev;

	    SAMPLES_TO_USEC(jmin, xr_stat.rx.stat_sum.jitter.min, 
			    port->info.fmt.det.aud.clock_rate);
	    SAMPLES_TO_USEC(jmax, xr_stat.rx.stat_sum.jitter.max, 
			    port->info.fmt.det.aud.clock_rate);
	    SAMPLES_TO_USEC(jmean, xr_stat.rx.stat_sum.jitter.mean, 
			    port->info.fmt.det.aud.clock_rate);
	    SAMPLES_TO_USEC(jdev, 
			   pj_math_stat_get_stddev(&xr_stat.rx.stat_sum.jitter),
			   port->info.fmt.det.aud.clock_rate);
	    sprintf(jitter, "%7.3f %7.3f %7.3f %7.3f", 
		    jmin/1000.0, jmean/1000.0, jmax/1000.0, jdev/1000.0);
	} else
	    sprintf(jitter, "(report not available)");

	if (xr_stat.rx.stat_sum.t) {
	    sprintf(toh, "%11d %11d %11d %11d", 
		    xr_stat.rx.stat_sum.toh.min,
		    xr_stat.rx.stat_sum.toh.mean,
		    xr_stat.rx.stat_sum.toh.max,
		    pj_math_stat_get_stddev(&xr_stat.rx.stat_sum.toh));
	} else
	    sprintf(toh, "(report not available)");

	if (xr_stat.rx.stat_sum.update.sec == 0)
	    strcpy(last_update, "never");
	else {
	    pj_gettimeofday(&now);
	    PJ_TIME_VAL_SUB(now, xr_stat.rx.stat_sum.update);
	    sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
		    now.sec / 3600,
		    (now.sec % 3600) / 60,
		    now.sec % 60,
		    now.msec);
	}

	printf(" RX last update: %s\n"
	       "    begin seq=%d, end seq=%d%s\n"
	       "    pkt loss=%s, dup=%s%s\n"
	       "          (msec)    min     avg     max     dev\n"
	       "    jitter     : %s\n"
	       "    toh        : %s\n",
	       last_update,
	       xr_stat.rx.stat_sum.begin_seq, xr_stat.rx.stat_sum.end_seq,
	       "",
	       loss, dup,
	       "",
	       jitter,
	       toh
	       );

	if (xr_stat.tx.stat_sum.l)
	    sprintf(loss, "%d", xr_stat.tx.stat_sum.lost);
	else
	    sprintf(loss, "(na)");

	if (xr_stat.tx.stat_sum.d)
	    sprintf(dup, "%d", xr_stat.tx.stat_sum.dup);
	else
	    sprintf(dup, "(na)");

	if (xr_stat.tx.stat_sum.j) {
	    unsigned jmin, jmax, jmean, jdev;

	    SAMPLES_TO_USEC(jmin, xr_stat.tx.stat_sum.jitter.min, 
			    port->info.fmt.det.aud.clock_rate);
	    SAMPLES_TO_USEC(jmax, xr_stat.tx.stat_sum.jitter.max, 
			    port->info.fmt.det.aud.clock_rate);
	    SAMPLES_TO_USEC(jmean, xr_stat.tx.stat_sum.jitter.mean, 
			    port->info.fmt.det.aud.clock_rate);
	    SAMPLES_TO_USEC(jdev, 
			   pj_math_stat_get_stddev(&xr_stat.tx.stat_sum.jitter),
			   port->info.fmt.det.aud.clock_rate);
	    sprintf(jitter, "%7.3f %7.3f %7.3f %7.3f", 
		    jmin/1000.0, jmean/1000.0, jmax/1000.0, jdev/1000.0);
	} else
	    sprintf(jitter, "(report not available)");

	if (xr_stat.tx.stat_sum.t) {
	    sprintf(toh, "%11d %11d %11d %11d", 
		    xr_stat.tx.stat_sum.toh.min,
		    xr_stat.tx.stat_sum.toh.mean,
		    xr_stat.tx.stat_sum.toh.max,
		    pj_math_stat_get_stddev(&xr_stat.rx.stat_sum.toh));
	} else
	    sprintf(toh,    "(report not available)");

	if (xr_stat.tx.stat_sum.update.sec == 0)
	    strcpy(last_update, "never");
	else {
	    pj_gettimeofday(&now);
	    PJ_TIME_VAL_SUB(now, xr_stat.tx.stat_sum.update);
	    sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
		    now.sec / 3600,
		    (now.sec % 3600) / 60,
		    now.sec % 60,
		    now.msec);
	}

	printf(" TX last update: %s\n"
	       "    begin seq=%d, end seq=%d%s\n"
	       "    pkt loss=%s, dup=%s%s\n"
	       "          (msec)    min     avg     max     dev\n"
	       "    jitter     : %s\n"
	       "    toh        : %s\n",
	       last_update,
	       xr_stat.tx.stat_sum.begin_seq, xr_stat.tx.stat_sum.end_seq,
	       "",
	       loss, dup,
	       "",
	       jitter,
	       toh
	       );

	/* VoIP Metrics */
	puts(" VoIP Metrics");

	PRINT_VOIP_MTC_VAL(signal_lvl, xr_stat.rx.voip_mtc.signal_lvl);
	PRINT_VOIP_MTC_VAL(noise_lvl, xr_stat.rx.voip_mtc.noise_lvl);
	PRINT_VOIP_MTC_VAL(rerl, xr_stat.rx.voip_mtc.rerl);
	PRINT_VOIP_MTC_VAL(r_factor, xr_stat.rx.voip_mtc.r_factor);
	PRINT_VOIP_MTC_VAL(ext_r_factor, xr_stat.rx.voip_mtc.ext_r_factor);
	PRINT_VOIP_MTC_VAL(mos_lq, xr_stat.rx.voip_mtc.mos_lq);
	PRINT_VOIP_MTC_VAL(mos_cq, xr_stat.rx.voip_mtc.mos_cq);

	switch ((xr_stat.rx.voip_mtc.rx_config>>6) & 3) {
	    case PJMEDIA_RTCP_XR_PLC_DIS:
		sprintf(plc, "DISABLED");
		break;
	    case PJMEDIA_RTCP_XR_PLC_ENH:
		sprintf(plc, "ENHANCED");
		break;
	    case PJMEDIA_RTCP_XR_PLC_STD:
		sprintf(plc, "STANDARD");
		break;
	    case PJMEDIA_RTCP_XR_PLC_UNK:
	    default:
		sprintf(plc, "UNKNOWN");
		break;
	}

	switch ((xr_stat.rx.voip_mtc.rx_config>>4) & 3) {
	    case PJMEDIA_RTCP_XR_JB_FIXED:
		sprintf(jba, "FIXED");
		break;
	    case PJMEDIA_RTCP_XR_JB_ADAPTIVE:
		sprintf(jba, "ADAPTIVE");
		break;
	    default:
		sprintf(jba, "UNKNOWN");
		break;
	}

	sprintf(jbr, "%d", xr_stat.rx.voip_mtc.rx_config & 0x0F);

	if (xr_stat.rx.voip_mtc.update.sec == 0)
	    strcpy(last_update, "never");
	else {
	    pj_gettimeofday(&now);
	    PJ_TIME_VAL_SUB(now, xr_stat.rx.voip_mtc.update);
	    sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
		    now.sec / 3600,
		    (now.sec % 3600) / 60,
		    now.sec % 60,
		    now.msec);
	}

	printf(" RX last update: %s\n"
	       "    packets    : loss rate=%d (%.2f%%), discard rate=%d (%.2f%%)\n"
	       "    burst      : density=%d (%.2f%%), duration=%d%s\n"
	       "    gap        : density=%d (%.2f%%), duration=%d%s\n"
	       "    delay      : round trip=%d%s, end system=%d%s\n"
	       "    level      : signal=%s%s, noise=%s%s, RERL=%s%s\n"
	       "    quality    : R factor=%s, ext R factor=%s\n"
	       "                 MOS LQ=%s, MOS CQ=%s\n"
	       "    config     : PLC=%s, JB=%s, JB rate=%s, Gmin=%d\n"
	       "    JB delay   : cur=%d%s, max=%d%s, abs max=%d%s\n",
	       last_update,
	       /* pakcets */
	       xr_stat.rx.voip_mtc.loss_rate, xr_stat.rx.voip_mtc.loss_rate*100.0/256,
	       xr_stat.rx.voip_mtc.discard_rate, xr_stat.rx.voip_mtc.discard_rate*100.0/256,
	       /* burst */
	       xr_stat.rx.voip_mtc.burst_den, xr_stat.rx.voip_mtc.burst_den*100.0/256,
	       xr_stat.rx.voip_mtc.burst_dur, "ms",
	       /* gap */
	       xr_stat.rx.voip_mtc.gap_den, xr_stat.rx.voip_mtc.gap_den*100.0/256,
	       xr_stat.rx.voip_mtc.gap_dur, "ms",
	       /* delay */
	       xr_stat.rx.voip_mtc.rnd_trip_delay, "ms",
	       xr_stat.rx.voip_mtc.end_sys_delay, "ms",
	       /* level */
	       signal_lvl, "dB",
	       noise_lvl, "dB",
	       rerl, "",
	       /* quality */
	       r_factor, ext_r_factor, mos_lq, mos_cq,
	       /* config */
	       plc, jba, jbr, xr_stat.rx.voip_mtc.gmin,
	       /* JB delay */
	       xr_stat.rx.voip_mtc.jb_nom, "ms",
	       xr_stat.rx.voip_mtc.jb_max, "ms",
	       xr_stat.rx.voip_mtc.jb_abs_max, "ms"
	       );

	PRINT_VOIP_MTC_VAL(signal_lvl, xr_stat.tx.voip_mtc.signal_lvl);
	PRINT_VOIP_MTC_VAL(noise_lvl, xr_stat.tx.voip_mtc.noise_lvl);
	PRINT_VOIP_MTC_VAL(rerl, xr_stat.tx.voip_mtc.rerl);
	PRINT_VOIP_MTC_VAL(r_factor, xr_stat.tx.voip_mtc.r_factor);
	PRINT_VOIP_MTC_VAL(ext_r_factor, xr_stat.tx.voip_mtc.ext_r_factor);
	PRINT_VOIP_MTC_VAL(mos_lq, xr_stat.tx.voip_mtc.mos_lq);
	PRINT_VOIP_MTC_VAL(mos_cq, xr_stat.tx.voip_mtc.mos_cq);

	switch ((xr_stat.tx.voip_mtc.rx_config>>6) & 3) {
	    case PJMEDIA_RTCP_XR_PLC_DIS:
		sprintf(plc, "DISABLED");
		break;
	    case PJMEDIA_RTCP_XR_PLC_ENH:
		sprintf(plc, "ENHANCED");
		break;
	    case PJMEDIA_RTCP_XR_PLC_STD:
		sprintf(plc, "STANDARD");
		break;
	    case PJMEDIA_RTCP_XR_PLC_UNK:
	    default:
		sprintf(plc, "unknown");
		break;
	}

	switch ((xr_stat.tx.voip_mtc.rx_config>>4) & 3) {
	    case PJMEDIA_RTCP_XR_JB_FIXED:
		sprintf(jba, "FIXED");
		break;
	    case PJMEDIA_RTCP_XR_JB_ADAPTIVE:
		sprintf(jba, "ADAPTIVE");
		break;
	    default:
		sprintf(jba, "unknown");
		break;
	}

	sprintf(jbr, "%d", xr_stat.tx.voip_mtc.rx_config & 0x0F);

	if (xr_stat.tx.voip_mtc.update.sec == 0)
	    strcpy(last_update, "never");
	else {
	    pj_gettimeofday(&now);
	    PJ_TIME_VAL_SUB(now, xr_stat.tx.voip_mtc.update);
	    sprintf(last_update, "%02ldh:%02ldm:%02ld.%03lds ago",
		    now.sec / 3600,
		    (now.sec % 3600) / 60,
		    now.sec % 60,
		    now.msec);
	}

	printf(" TX last update: %s\n"
	       "    packets    : loss rate=%d (%.2f%%), discard rate=%d (%.2f%%)\n"
	       "    burst      : density=%d (%.2f%%), duration=%d%s\n"
	       "    gap        : density=%d (%.2f%%), duration=%d%s\n"
	       "    delay      : round trip=%d%s, end system=%d%s\n"
	       "    level      : signal=%s%s, noise=%s%s, RERL=%s%s\n"
	       "    quality    : R factor=%s, ext R factor=%s\n"
	       "                 MOS LQ=%s, MOS CQ=%s\n"
	       "    config     : PLC=%s, JB=%s, JB rate=%s, Gmin=%d\n"
	       "    JB delay   : cur=%d%s, max=%d%s, abs max=%d%s\n",
	       last_update,
	       /* pakcets */
	       xr_stat.tx.voip_mtc.loss_rate, xr_stat.tx.voip_mtc.loss_rate*100.0/256,
	       xr_stat.tx.voip_mtc.discard_rate, xr_stat.tx.voip_mtc.discard_rate*100.0/256,
	       /* burst */
	       xr_stat.tx.voip_mtc.burst_den, xr_stat.tx.voip_mtc.burst_den*100.0/256,
	       xr_stat.tx.voip_mtc.burst_dur, "ms",
	       /* gap */
	       xr_stat.tx.voip_mtc.gap_den, xr_stat.tx.voip_mtc.gap_den*100.0/256,
	       xr_stat.tx.voip_mtc.gap_dur, "ms",
	       /* delay */
	       xr_stat.tx.voip_mtc.rnd_trip_delay, "ms",
	       xr_stat.tx.voip_mtc.end_sys_delay, "ms",
	       /* level */
	       signal_lvl, "dB",
	       noise_lvl, "dB",
	       rerl, "",
	       /* quality */
	       r_factor, ext_r_factor, mos_lq, mos_cq,
	       /* config */
	       plc, jba, jbr, xr_stat.tx.voip_mtc.gmin,
	       /* JB delay */
	       xr_stat.tx.voip_mtc.jb_nom, "ms",
	       xr_stat.tx.voip_mtc.jb_max, "ms",
	       xr_stat.tx.voip_mtc.jb_abs_max, "ms"
	       );


	/* RTT delay (by receiver side) */
	printf("          (msec)    min     avg     max     last    dev\n");
	printf(" RTT delay     : %7.3f %7.3f %7.3f %7.3f %7.3f%s\n", 
	       xr_stat.rtt.min / 1000.0,
	       xr_stat.rtt.mean / 1000.0,
	       xr_stat.rtt.max / 1000.0,
	       xr_stat.rtt.last / 1000.0,
	       pj_math_stat_get_stddev(&xr_stat.rtt) / 1000.0,
	       ""
	       );
    } while (0);
#endif /* PJMEDIA_HAS_RTCP_XR */

}

