add use_101 option to disable 101 dialog established

[linphone] / coreapi / linphonecore.c

/*
linphone
Copyright (C) 2000  Simon MORLAT (simon.morlat@linphone.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.
*/

#include "linphonecore.h"
#include "sipsetup.h"
#include "lpconfig.h"
#include "private.h"

#include <ortp/telephonyevents.h>
#include "mediastreamer2/mediastream.h"
#include "mediastreamer2/mseventqueue.h"
#include "mediastreamer2/msvolume.h"
#include "mediastreamer2/msequalizer.h"
#include "mediastreamer2/dtmfgen.h"

#ifdef INET6
#ifndef WIN32
#include <netdb.h>
#endif
#endif

/*#define UNSTANDART_GSM_11K 1*/

static const char *liblinphone_version=LIBLINPHONE_VERSION;
static void set_network_reachable(LinphoneCore* lc,bool_t isReachable, time_t curtime);
static void linphone_core_run_hooks(LinphoneCore *lc);
static void linphone_core_free_hooks(LinphoneCore *lc);

#include "enum.h"
const char *linphone_core_get_nat_address_resolved(LinphoneCore *lc);
void linphone_core_get_local_ip(LinphoneCore *lc, const char *dest, char *result);
static void toggle_video_preview(LinphoneCore *lc, bool_t val);

/* relative path where is stored local ring*/
#define LOCAL_RING "rings/oldphone.wav"
/* same for remote ring (ringback)*/
#define REMOTE_RING "ringback.wav"
#define HOLD_MUSIC "rings/toy-mono.wav"


extern SalCallbacks linphone_sal_callbacks;

void lc_callback_obj_init(LCCallbackObj *obj,LinphoneCoreCbFunc func,void* ud)
{
  obj->_func=func;
  obj->_user_data=ud;
}

int lc_callback_obj_invoke(LCCallbackObj *obj, LinphoneCore *lc){
        if (obj->_func!=NULL) obj->_func(lc,obj->_user_data);
        return 0;
}

                
/*prevent a gcc bug with %c*/
static size_t my_strftime(char *s, size_t max, const char  *fmt,  const struct tm *tm){
#if !defined(_WIN32_WCE)
        return strftime(s, max, fmt, tm);
#else
        return 0;
        /*FIXME*/
#endif /*_WIN32_WCE*/
}

static void set_call_log_date(LinphoneCallLog *cl, const struct tm *loctime){
        my_strftime(cl->start_date,sizeof(cl->start_date),"%c",loctime);
}

LinphoneCallLog * linphone_call_log_new(LinphoneCall *call, LinphoneAddress *from, LinphoneAddress *to){
        LinphoneCallLog *cl=ms_new0(LinphoneCallLog,1);
        struct tm loctime;
        cl->dir=call->dir;
#ifdef WIN32
#if !defined(_WIN32_WCE)
        loctime=*localtime(&call->start_time);
        /*FIXME*/
#endif /*_WIN32_WCE*/
#else
        localtime_r(&call->start_time,&loctime);
#endif
        set_call_log_date(cl,&loctime);
        cl->from=from;
        cl->to=to;
    cl->status=LinphoneCallAborted; /*default status*/
        return cl;
}

void call_logs_write_to_config_file(LinphoneCore *lc){
        MSList *elem;
        char logsection[32];
        int i;
        char *tmp;
        LpConfig *cfg=lc->config;

        if (linphone_core_get_global_state (lc)==LinphoneGlobalStartup) return;
        
        for(i=0,elem=lc->call_logs;elem!=NULL;elem=elem->next,++i){
                LinphoneCallLog *cl=(LinphoneCallLog*)elem->data;
                snprintf(logsection,sizeof(logsection),"call_log_%i",i);
                lp_config_set_int(cfg,logsection,"dir",cl->dir);
                lp_config_set_int(cfg,logsection,"status",cl->status);
                tmp=linphone_address_as_string(cl->from);
                lp_config_set_string(cfg,logsection,"from",tmp);
                ms_free(tmp);
                tmp=linphone_address_as_string(cl->to);
                lp_config_set_string(cfg,logsection,"to",tmp);
                ms_free(tmp);
                lp_config_set_string(cfg,logsection,"start_date",cl->start_date);
                lp_config_set_int(cfg,logsection,"duration",cl->duration);
                if (cl->refkey) lp_config_set_string(cfg,logsection,"refkey",cl->refkey);
        }
        for(;i<lc->max_call_logs;++i){
                snprintf(logsection,sizeof(logsection),"call_log_%i",i);
                lp_config_clean_section(cfg,logsection);
        }
}

static void call_logs_read_from_config_file(LinphoneCore *lc){
        char logsection[32];
        int i;
        const char *tmp;
        LpConfig *cfg=lc->config;
        for(i=0;;++i){
                snprintf(logsection,sizeof(logsection),"call_log_%i",i);
                if (lp_config_has_section(cfg,logsection)){
                        LinphoneCallLog *cl=ms_new0(LinphoneCallLog,1);
                        cl->dir=lp_config_get_int(cfg,logsection,"dir",0);
                        cl->status=lp_config_get_int(cfg,logsection,"status",0);
                        tmp=lp_config_get_string(cfg,logsection,"from",NULL);
                        if (tmp) cl->from=linphone_address_new(tmp);
                        tmp=lp_config_get_string(cfg,logsection,"to",NULL);
                        if (tmp) cl->to=linphone_address_new(tmp);
                        tmp=lp_config_get_string(cfg,logsection,"start_date",NULL);
                        if (tmp) strncpy(cl->start_date,tmp,sizeof(cl->start_date));
                        cl->duration=lp_config_get_int(cfg,logsection,"duration",0);
                        tmp=lp_config_get_string(cfg,logsection,"refkey",NULL);
                        if (tmp) cl->refkey=ms_strdup(tmp);
                        lc->call_logs=ms_list_append(lc->call_logs,cl);
                }else break;    
        }
}



/**
 * @addtogroup call_logs
 * @{
**/

/**
 * Returns a human readable string describing the call.
 * 
 * @note: the returned char* must be freed by the application (use ms_free()).
**/
char * linphone_call_log_to_str(LinphoneCallLog *cl){
        char *status;
        char *tmp;
        char *from=linphone_address_as_string (cl->from);
        char *to=linphone_address_as_string (cl->to);
        switch(cl->status){
                case LinphoneCallAborted:
                        status=_("aborted");
                        break;
                case LinphoneCallSuccess:
                        status=_("completed");
                        break;
                case LinphoneCallMissed:
                        status=_("missed");
                        break;
                default:
                        status="unknown";
        }
        tmp=ortp_strdup_printf(_("%s at %s\nFrom: %s\nTo: %s\nStatus: %s\nDuration: %i mn %i sec\n"),
                        (cl->dir==LinphoneCallIncoming) ? _("Incoming call") : _("Outgoing call"),
                        cl->start_date,
                        from,
                        to,
                        status,
                        cl->duration/60,
                        cl->duration%60);
        ms_free(from);
        ms_free(to);
        return tmp;
}

/**
 * Returns RTP statistics computed locally regarding the call.
 * 
**/
const rtp_stats_t *linphone_call_log_get_local_stats(const LinphoneCallLog *cl){
        return &cl->local_stats;
}

/**
 * Returns RTP statistics computed by remote end and sent back via RTCP.
 *
 * @note Not implemented yet.
**/
const rtp_stats_t *linphone_call_log_get_remote_stats(const LinphoneCallLog *cl){
        return &cl->remote_stats;
}

void linphone_call_log_set_user_pointer(LinphoneCallLog *cl, void *up){
        cl->user_pointer=up;
}

void *linphone_call_log_get_user_pointer(const LinphoneCallLog *cl){
        return cl->user_pointer;
}



/**
 * Associate a persistent reference key to the call log.
 *
 * The reference key can be for example an id to an external database.
 * It is stored in the config file, thus can survive to process exits/restarts.
 *
**/
void linphone_call_log_set_ref_key(LinphoneCallLog *cl, const char *refkey){
        if (cl->refkey!=NULL){
                ms_free(cl->refkey);
                cl->refkey=NULL;
        }
        if (refkey) cl->refkey=ms_strdup(refkey);
        call_logs_write_to_config_file(cl->lc);
}

/**
 * Get the persistent reference key associated to the call log.
 *
 * The reference key can be for example an id to an external database.
 * It is stored in the config file, thus can survive to process exits/restarts.
 *
**/
const char *linphone_call_log_get_ref_key(const LinphoneCallLog *cl){
        return cl->refkey;
}

/** @} */

void linphone_call_log_destroy(LinphoneCallLog *cl){
        if (cl->from!=NULL) linphone_address_destroy(cl->from);
        if (cl->to!=NULL) linphone_address_destroy(cl->to);
        if (cl->refkey!=NULL) ms_free(cl->refkey);
        ms_free(cl);
}

/**
 * Returns TRUE if the LinphoneCall asked to autoanswer
 *
**/
bool_t linphone_call_asked_to_autoanswer(LinphoneCall *call){
        //return TRUE if the unique(for the moment) incoming call asked to be autoanswered
        if(call)
                return sal_call_autoanswer_asked(call->op);
        else
                return FALSE;
}

int linphone_core_get_current_call_duration(const LinphoneCore *lc){
        LinphoneCall *call=linphone_core_get_current_call((LinphoneCore *)lc);
        if (call)  return linphone_call_get_duration(call);
        return -1;
}

const LinphoneAddress *linphone_core_get_current_call_remote_address(struct _LinphoneCore *lc){
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (call==NULL) return NULL;
        return linphone_call_get_remote_address(call);
}

/**
 * Enable logs in supplied FILE*.
 *
 * @ingroup misc
 *
 * @param file a C FILE* where to fprintf logs. If null stdout is used.
 * 
**/
void linphone_core_enable_logs(FILE *file){
        if (file==NULL) file=stdout;
        ortp_set_log_file(file);
        ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR|ORTP_FATAL);
}

/**
 * Enable logs through the user's supplied log callback.
 *
 * @ingroup misc
 *
 * @param logfunc The address of a OrtpLogFunc callback whose protoype is
 *                typedef void (*OrtpLogFunc)(OrtpLogLevel lev, const char *fmt, va_list args);
 * 
**/
void linphone_core_enable_logs_with_cb(OrtpLogFunc logfunc){
        ortp_set_log_level_mask(ORTP_MESSAGE|ORTP_WARNING|ORTP_ERROR|ORTP_FATAL);
        ortp_set_log_handler(logfunc);
}

/**
 * Entirely disable logging.
 *
 * @ingroup misc
**/
void linphone_core_disable_logs(){
        ortp_set_log_level_mask(ORTP_ERROR|ORTP_FATAL);
}


static void net_config_read (LinphoneCore *lc)
{
        int tmp;
        const char *tmpstr;
        LpConfig *config=lc->config;

        lc->net_conf.nat_address_ip = NULL;
        tmp=lp_config_get_int(config,"net","download_bw",0);
        linphone_core_set_download_bandwidth(lc,tmp);
        tmp=lp_config_get_int(config,"net","upload_bw",0);
        linphone_core_set_upload_bandwidth(lc,tmp);
        linphone_core_set_stun_server(lc,lp_config_get_string(config,"net","stun_server",NULL));
        tmpstr=lp_config_get_string(lc->config,"net","nat_address",NULL);
        if (tmpstr!=NULL && (strlen(tmpstr)<1)) tmpstr=NULL;
        linphone_core_set_nat_address(lc,tmpstr);
        tmp=lp_config_get_int(lc->config,"net","firewall_policy",0);
        linphone_core_set_firewall_policy(lc,tmp);
        tmp=lp_config_get_int(lc->config,"net","nat_sdp_only",0);
        lc->net_conf.nat_sdp_only=tmp;
        tmp=lp_config_get_int(lc->config,"net","mtu",0);
        linphone_core_set_mtu(lc,tmp);
        tmp=lp_config_get_int(lc->config,"net","download_ptime",0);
        linphone_core_set_download_ptime(lc,tmp);

}

static void build_sound_devices_table(LinphoneCore *lc){
        const char **devices;
        const char **old;
        int ndev;
        int i;
        const MSList *elem=ms_snd_card_manager_get_list(ms_snd_card_manager_get());
        ndev=ms_list_size(elem);
        devices=ms_malloc((ndev+1)*sizeof(const char *));
        for (i=0;elem!=NULL;elem=elem->next,i++){
                devices[i]=ms_snd_card_get_string_id((MSSndCard *)elem->data);
        }
        devices[ndev]=NULL;
        old=lc->sound_conf.cards;
        lc->sound_conf.cards=devices;
        if (old!=NULL) ms_free(old);
}

static void sound_config_read(LinphoneCore *lc)
{
        int tmp;
        const char *tmpbuf;
        const char *devid;
        float gain=0;
#ifdef __linux
        /*alsadev let the user use custom alsa device within linphone*/
        devid=lp_config_get_string(lc->config,"sound","alsadev",NULL);
        if (devid){
                MSSndCard *card=ms_alsa_card_new_custom(devid,devid);
                ms_snd_card_manager_add_card(ms_snd_card_manager_get(),card);
        }
#endif
        /* retrieve all sound devices */
        build_sound_devices_table(lc);

        devid=lp_config_get_string(lc->config,"sound","playback_dev_id",NULL);
        linphone_core_set_playback_device(lc,devid);

        devid=lp_config_get_string(lc->config,"sound","ringer_dev_id",NULL);
        linphone_core_set_ringer_device(lc,devid);

        devid=lp_config_get_string(lc->config,"sound","capture_dev_id",NULL);
        linphone_core_set_capture_device(lc,devid);

/*
        tmp=lp_config_get_int(lc->config,"sound","play_lev",80);
        linphone_core_set_play_level(lc,tmp);
        tmp=lp_config_get_int(lc->config,"sound","ring_lev",80);
        linphone_core_set_ring_level(lc,tmp);
        tmp=lp_config_get_int(lc->config,"sound","rec_lev",80);
        linphone_core_set_rec_level(lc,tmp);
        tmpbuf=lp_config_get_string(lc->config,"sound","source","m");
        linphone_core_set_sound_source(lc,tmpbuf[0]);
*/

        tmpbuf=PACKAGE_SOUND_DIR "/" LOCAL_RING;
        tmpbuf=lp_config_get_string(lc->config,"sound","local_ring",tmpbuf);
        if (ortp_file_exist(tmpbuf)==-1) {
                ms_warning("%s does not exist",tmpbuf);
                tmpbuf=PACKAGE_SOUND_DIR "/" LOCAL_RING;
        }
        if (strstr(tmpbuf,".wav")==NULL){
                /* it currently uses old sound files, so replace them */
                tmpbuf=PACKAGE_SOUND_DIR "/" LOCAL_RING;
        }
        linphone_core_set_ring(lc,tmpbuf);

        tmpbuf=PACKAGE_SOUND_DIR "/" REMOTE_RING;
        tmpbuf=lp_config_get_string(lc->config,"sound","remote_ring",tmpbuf);
        if (ortp_file_exist(tmpbuf)==-1){
                tmpbuf=PACKAGE_SOUND_DIR "/" REMOTE_RING;
        }
        if (strstr(tmpbuf,".wav")==NULL){
                /* it currently uses old sound files, so replace them */
                tmpbuf=PACKAGE_SOUND_DIR "/" REMOTE_RING;
        }
        linphone_core_set_ringback(lc,tmpbuf);

        linphone_core_set_play_file(lc,lp_config_get_string(lc->config,"sound","hold_music",PACKAGE_SOUND_DIR "/" HOLD_MUSIC));
        check_sound_device(lc);
        lc->sound_conf.latency=0;
#if !defined(TARGET_OS_IPHONE) && !defined(ANDROID)
    tmp=TRUE;
#else 
    tmp=FALSE;
#endif
    tmp=lp_config_get_int(lc->config,"sound","echocancellation",tmp);
        linphone_core_enable_echo_cancellation(lc,tmp);
        linphone_core_enable_echo_limiter(lc,
                lp_config_get_int(lc->config,"sound","echolimiter",0));
        linphone_core_enable_agc(lc,
                lp_config_get_int(lc->config,"sound","agc",0));

        gain=lp_config_get_float(lc->config,"sound","playback_gain_db",0);
        linphone_core_set_playback_gain_db (lc,gain);

        linphone_core_set_remote_ringback_tone (lc,lp_config_get_string(lc->config,"sound","ringback_tone",NULL));
}

static void sip_config_read(LinphoneCore *lc)
{
        char *contact;
        const char *tmpstr;
        LCSipTransports tr;
        int i,tmp;
        int ipv6;

        tmp=lp_config_get_int(lc->config,"sip","use_info",0);
        linphone_core_set_use_info_for_dtmf(lc,tmp);

        if (lp_config_get_int(lc->config,"sip","use_session_timers",0)==1){
                sal_use_session_timers(lc->sal,200);
        }

        sal_use_rport(lc->sal,lp_config_get_int(lc->config,"sip","use_rport",1));
        sal_use_101(lc->sal,lp_config_get_int(lc->config,"sip","use_101",1));

        tmp=lp_config_get_int(lc->config,"sip","use_rfc2833",0);
        linphone_core_set_use_rfc2833_for_dtmf(lc,tmp);

        ipv6=lp_config_get_int(lc->config,"sip","use_ipv6",-1);
        if (ipv6==-1){
                ipv6=0;
        }
        linphone_core_enable_ipv6(lc,ipv6);
        memset(&tr,0,sizeof(tr));
        if (lp_config_get_int(lc->config,"sip","sip_random_port",0)) {
                tr.udp_port=(0xDFF&+random())+1024;
        } else {
                tr.udp_port=lp_config_get_int(lc->config,"sip","sip_port",5060);
        }
        if (lp_config_get_int(lc->config,"sip","sip_tcp_random_port",0)) {
                tr.tcp_port=(0xDFF&+random())+1024;
        } else {
                tr.tcp_port=lp_config_get_int(lc->config,"sip","sip_tcp_port",0);
        }
        /*start listening on ports*/
        linphone_core_set_sip_transports(lc,&tr);

        tmpstr=lp_config_get_string(lc->config,"sip","contact",NULL);
        if (tmpstr==NULL || linphone_core_set_primary_contact(lc,tmpstr)==-1) {
                const char *hostname=NULL;
                const char *username=NULL;
#ifdef HAVE_GETENV
                hostname=getenv("HOST");
                username=getenv("USER");
                if (hostname==NULL) hostname=getenv("HOSTNAME");
#endif /*HAVE_GETENV*/
                if (hostname==NULL)
                        hostname="unknown-host";
                if (username==NULL){
                        username="toto";
                }
                contact=ortp_strdup_printf("sip:%s@%s",username,hostname);
                linphone_core_set_primary_contact(lc,contact);
                ms_free(contact);
        }

        tmp=lp_config_get_int(lc->config,"sip","guess_hostname",1);
        linphone_core_set_guess_hostname(lc,tmp);


        tmp=lp_config_get_int(lc->config,"sip","inc_timeout",15);
        linphone_core_set_inc_timeout(lc,tmp);

        /* get proxies config */
        for(i=0;; i++){
                LinphoneProxyConfig *cfg=linphone_proxy_config_new_from_config_file(lc->config,i);
                if (cfg!=NULL){
                        linphone_core_add_proxy_config(lc,cfg);
                }else{
                        break;
                }
        }
        /* get the default proxy */
        tmp=lp_config_get_int(lc->config,"sip","default_proxy",-1);
        linphone_core_set_default_proxy_index(lc,tmp);

        /* read authentication information */
        for(i=0;; i++){
                LinphoneAuthInfo *ai=linphone_auth_info_new_from_config_file(lc->config,i);
                if (ai!=NULL){
                        linphone_core_add_auth_info(lc,ai);
                        linphone_auth_info_destroy(ai);
                }else{
                        break;
                }
        }
        
        /*for tuning or test*/
        lc->sip_conf.sdp_200_ack=lp_config_get_int(lc->config,"sip","sdp_200_ack",0);
        lc->sip_conf.register_only_when_network_is_up=
                lp_config_get_int(lc->config,"sip","register_only_when_network_is_up",1);
        lc->sip_conf.ping_with_options=lp_config_get_int(lc->config,"sip","ping_with_options",1);
        lc->sip_conf.auto_net_state_mon=lp_config_get_int(lc->config,"sip","auto_net_state_mon",1);
        lc->sip_conf.keepalive_period=lp_config_get_int(lc->config,"sip","keepalive_period",10000);
        sal_set_keepalive_period(lc->sal,lc->sip_conf.keepalive_period);
        sal_use_one_matching_codec_policy(lc->sal,lp_config_get_int(lc->config,"sip","only_one_codec",0));
        sal_use_double_registrations(lc->sal,lp_config_get_int(lc->config,"sip","use_double_registrations",1));
}

static void rtp_config_read(LinphoneCore *lc)
{
        int port;
        int jitt_comp;
        int nortp_timeout;
        bool_t rtp_no_xmit_on_audio_mute;

        port=lp_config_get_int(lc->config,"rtp","audio_rtp_port",7078);
        linphone_core_set_audio_port(lc,port);

        port=lp_config_get_int(lc->config,"rtp","video_rtp_port",9078);
        if (port==0) port=9078;
        linphone_core_set_video_port(lc,port);

        jitt_comp=lp_config_get_int(lc->config,"rtp","audio_jitt_comp",60);
        linphone_core_set_audio_jittcomp(lc,jitt_comp);
        jitt_comp=lp_config_get_int(lc->config,"rtp","video_jitt_comp",60);
        if (jitt_comp==0) jitt_comp=60;
        lc->rtp_conf.video_jitt_comp=jitt_comp;
        nortp_timeout=lp_config_get_int(lc->config,"rtp","nortp_timeout",30);
        linphone_core_set_nortp_timeout(lc,nortp_timeout);
        rtp_no_xmit_on_audio_mute=lp_config_get_int(lc->config,"rtp","rtp_no_xmit_on_audio_mute",FALSE);
        linphone_core_set_rtp_no_xmit_on_audio_mute(lc,rtp_no_xmit_on_audio_mute);      
}

static PayloadType * find_payload(RtpProfile *prof, const char *mime_type, int clock_rate, const char *recv_fmtp){
        PayloadType *candidate=NULL;
        int i;
        PayloadType *it;
        for(i=0;i<127;++i){
                it=rtp_profile_get_payload(prof,i);
                if (it!=NULL && strcasecmp(mime_type,it->mime_type)==0
                        && (clock_rate==it->clock_rate || clock_rate<=0) ){
                        if ( (recv_fmtp && it->recv_fmtp && strstr(recv_fmtp,it->recv_fmtp)!=NULL) ||
                                (recv_fmtp==NULL && it->recv_fmtp==NULL) ){
                                /*exact match*/
                                if (recv_fmtp) payload_type_set_recv_fmtp(it,recv_fmtp);
                                return it;
                        }else {
                                if (candidate){
                                        if (it->recv_fmtp==NULL) candidate=it;
                                }else candidate=it;
                        }
                }
        }
        if (candidate && recv_fmtp){
                payload_type_set_recv_fmtp(candidate,recv_fmtp);
        }
        return candidate;
}

static bool_t get_codec(LpConfig *config, const char* type, int index, PayloadType **ret){
        char codeckey[50];
        const char *mime,*fmtp;
        int rate,enabled;
        PayloadType *pt;

        *ret=NULL;
        snprintf(codeckey,50,"%s_%i",type,index);
        mime=lp_config_get_string(config,codeckey,"mime",NULL);
        if (mime==NULL || strlen(mime)==0 ) return FALSE;

        rate=lp_config_get_int(config,codeckey,"rate",8000);
        fmtp=lp_config_get_string(config,codeckey,"recv_fmtp",NULL);
        enabled=lp_config_get_int(config,codeckey,"enabled",1);
        pt=find_payload(&av_profile,mime,rate,fmtp);
        if (pt && enabled ) pt->flags|=PAYLOAD_TYPE_ENABLED;
        //ms_message("Found codec %s/%i",pt->mime_type,pt->clock_rate);
        if (pt==NULL) ms_warning("Ignoring codec config %s/%i with fmtp=%s because unsupported",
                        mime,rate,fmtp ? fmtp : "");
        *ret=pt;
        return TRUE;
}

static const char *codec_pref_order[]={
        "speex",
        "gsm",
        "pcmu",
        "pcma",
        "H264",
        "MP4V-ES",
        "theora",
        "H263-1998",
        "H263",
        "x-snow",
        NULL,
};

static int find_codec_rank(const char *mime){
        int i;
        for(i=0;codec_pref_order[i]!=NULL;++i){
                if (strcasecmp(codec_pref_order[i],mime)==0)
                        break;
        }
        return i;
}

static int codec_compare(const PayloadType *a, const PayloadType *b){
        int ra,rb;
        ra=find_codec_rank(a->mime_type);
        rb=find_codec_rank(b->mime_type);
        if (ra>rb) return 1;
        if (ra<rb) return -1;
        return 0;
}

static MSList *add_missing_codecs(SalStreamType mtype, MSList *l){
        int i;
        for(i=0;i<127;++i){
                PayloadType *pt=rtp_profile_get_payload(&av_profile,i);
                if (pt){
                        if (mtype==SalVideo && pt->type!=PAYLOAD_VIDEO)
                                pt=NULL;
                        else if (mtype==SalAudio && (pt->type!=PAYLOAD_AUDIO_PACKETIZED 
                            && pt->type!=PAYLOAD_AUDIO_CONTINUOUS)){
                                pt=NULL;
                        }
                        if (pt && ms_filter_codec_supported(pt->mime_type)){
                                if (ms_list_find(l,pt)==NULL){
                                        /*do not enable old or experimental codecs by default*/
                                        if (strcasecmp(pt->mime_type,"H263")!=0 && strcasecmp(pt->mime_type,"x-snow")!=0){
                                                payload_type_set_flag(pt,PAYLOAD_TYPE_ENABLED);
                                        }
                                        ms_message("Adding new codec %s/%i with fmtp %s",
                                            pt->mime_type,pt->clock_rate,pt->recv_fmtp ? pt->recv_fmtp : "");
                                        l=ms_list_insert_sorted(l,pt,(int (*)(const void *, const void *))codec_compare);
                                }
                        }
                }
        }
        return l;
}

static MSList *codec_append_if_new(MSList *l, PayloadType *pt){
        MSList *elem;
        for (elem=l;elem!=NULL;elem=elem->next){
                PayloadType *ept=(PayloadType*)elem->data;
                if (pt==ept)
                        return l;
        }
        l=ms_list_append(l,pt);
        return l;
}

static void codecs_config_read(LinphoneCore *lc)
{
        int i;
        PayloadType *pt;
        MSList *audio_codecs=NULL;
        MSList *video_codecs=NULL;
        for (i=0;get_codec(lc->config,"audio_codec",i,&pt);i++){
                if (pt){
                        if (!ms_filter_codec_supported(pt->mime_type)){
                                ms_warning("Codec %s is not supported by mediastreamer2, removed.",pt->mime_type);
                        }else audio_codecs=codec_append_if_new(audio_codecs,pt);
                }
        }
        audio_codecs=add_missing_codecs(SalAudio,audio_codecs);
        for (i=0;get_codec(lc->config,"video_codec",i,&pt);i++){
                if (pt){
                        if (!ms_filter_codec_supported(pt->mime_type)){
                                ms_warning("Codec %s is not supported by mediastreamer2, removed.",pt->mime_type);
                        }else video_codecs=codec_append_if_new(video_codecs,(void *)pt);
                }
        }
        video_codecs=add_missing_codecs(SalVideo,video_codecs);
        linphone_core_set_audio_codecs(lc,audio_codecs);
        linphone_core_set_video_codecs(lc,video_codecs);
        linphone_core_update_allocated_audio_bandwidth(lc);
}

static void video_config_read(LinphoneCore *lc){
        int capture, display, self_view;
        const char *str;
        int ndev;
        const char **devices;
        const MSList *elem;
        int i;

        /* retrieve all video devices */
        elem=ms_web_cam_manager_get_list(ms_web_cam_manager_get());
        ndev=ms_list_size(elem);
        devices=ms_malloc((ndev+1)*sizeof(const char *));
        for (i=0;elem!=NULL;elem=elem->next,i++){
                devices[i]=ms_web_cam_get_string_id((MSWebCam *)elem->data);
        }
        devices[ndev]=NULL;
        lc->video_conf.cams=devices;

        str=lp_config_get_string(lc->config,"video","device",NULL);
        if (str && str[0]==0) str=NULL;
        linphone_core_set_video_device(lc,str);

        linphone_core_set_preferred_video_size_by_name(lc,
                lp_config_get_string(lc->config,"video","size","cif"));

        capture=lp_config_get_int(lc->config,"video","capture",1);
        display=lp_config_get_int(lc->config,"video","display",1);
        self_view=lp_config_get_int(lc->config,"video","self_view",1);
        lc->video_conf.displaytype=lp_config_get_string(lc->config,"video","displaytype",NULL);
        if(lc->video_conf.displaytype)
                ms_message("we are using a specific display:%s\n",lc->video_conf.displaytype);
#ifdef VIDEO_ENABLED
        linphone_core_enable_video(lc,capture,display);
        linphone_core_enable_self_view(lc,self_view);
#endif
}

static void ui_config_read(LinphoneCore *lc)
{
        LinphoneFriend *lf;
        int i;
        for (i=0;(lf=linphone_friend_new_from_config_file(lc,i))!=NULL;i++){
                linphone_core_add_friend(lc,lf);
        }
        call_logs_read_from_config_file(lc);
}

/*
static void autoreplier_config_init(LinphoneCore *lc)
{
        autoreplier_config_t *config=&lc->autoreplier_conf;
        config->enabled=lp_config_get_int(lc->config,"autoreplier","enabled",0);
        config->after_seconds=lp_config_get_int(lc->config,"autoreplier","after_seconds",6);
        config->max_users=lp_config_get_int(lc->config,"autoreplier","max_users",1);
        config->max_rec_time=lp_config_get_int(lc->config,"autoreplier","max_rec_time",60);
        config->max_rec_msg=lp_config_get_int(lc->config,"autoreplier","max_rec_msg",10);
        config->message=lp_config_get_string(lc->config,"autoreplier","message",NULL);
}
*/

/**
 * Sets maximum available download bandwidth
 *
 * @ingroup media_parameters
 *
 * This is IP bandwidth, in kbit/s.
 * This information is used signaled to other parties during
 * calls (within SDP messages) so that the remote end can have
 * sufficient knowledge to properly configure its audio & video
 * codec output bitrate to not overflow available bandwidth.
 *
 * @param lc the LinphoneCore object
 * @param bw the bandwidth in kbits/s, 0 for infinite
 */
void linphone_core_set_download_bandwidth(LinphoneCore *lc, int bw){
        lc->net_conf.download_bw=bw;
}

/**
 * Sets maximum available upload bandwidth
 *
 * @ingroup media_parameters
 *
 * This is IP bandwidth, in kbit/s.
 * This information is used by liblinphone together with remote
 * side available bandwidth signaled in SDP messages to properly
 * configure audio & video codec's output bitrate.
 *
 * @param lc the LinphoneCore object
 * @param bw the bandwidth in kbits/s, 0 for infinite
 */
void linphone_core_set_upload_bandwidth(LinphoneCore *lc, int bw){
        lc->net_conf.upload_bw=bw;
}

/**
 * Retrieve the maximum available download bandwidth.
 *
 * @ingroup media_parameters
 *
 * This value was set by linphone_core_set_download_bandwidth().
 *
**/
int linphone_core_get_download_bandwidth(const LinphoneCore *lc){
        return lc->net_conf.download_bw;
}

/**
 * Retrieve the maximum available upload bandwidth.
 *
 * @ingroup media_parameters
 *
 * This value was set by linphone_core_set_upload_bandwidth().
 *
**/
int linphone_core_get_upload_bandwidth(const LinphoneCore *lc){
        return lc->net_conf.upload_bw;
}
/**
 * set audio packetization time linphone expect to received from peer
 */
void linphone_core_set_download_ptime(LinphoneCore *lc, int ptime) {
        lc->net_conf.down_ptime=ptime;
}

int  linphone_core_get_download_ptime(LinphoneCore *lc) {
        return lc->net_conf.down_ptime;
}


/**
 * Returns liblinphone's version as a string.
 *
 * @ingroup misc
 *
**/
const char * linphone_core_get_version(void){
        return liblinphone_version;
}


static MSList *linphone_payload_types=NULL;

static void linphone_core_assign_payload_type(PayloadType *const_pt, int number, const char *recv_fmtp){
        PayloadType *pt;
        pt=payload_type_clone(const_pt);
        payload_type_set_number(pt,number);
        if (recv_fmtp!=NULL) payload_type_set_recv_fmtp(pt,recv_fmtp);
        rtp_profile_set_payload(&av_profile,number,pt);
        linphone_payload_types=ms_list_append(linphone_payload_types,pt);
}

static void linphone_core_free_payload_types(void){
        ms_list_for_each(linphone_payload_types,(void (*)(void*))payload_type_destroy);
        ms_list_free(linphone_payload_types);
        linphone_payload_types=NULL;
}

void linphone_core_set_state(LinphoneCore *lc, LinphoneGlobalState gstate, const char *message){
        lc->state=gstate;
        if (lc->vtable.global_state_changed){
                lc->vtable.global_state_changed(lc,gstate,message);
        }
}
static void misc_config_read (LinphoneCore *lc) {
        LpConfig *config=lc->config;
    lc->max_call_logs=lp_config_get_int(config,"misc","history_max_size",15);
}

static void linphone_core_init (LinphoneCore * lc, const LinphoneCoreVTable *vtable, const char *config_path, 
    const char *factory_config_path, void * userdata)
{
        memset (lc, 0, sizeof (LinphoneCore));
        lc->data=userdata;
        lc->ringstream_autorelease=TRUE;
        
        memcpy(&lc->vtable,vtable,sizeof(LinphoneCoreVTable));

        linphone_core_set_state(lc,LinphoneGlobalStartup,"Starting up");
        ortp_init();
        linphone_core_assign_payload_type(&payload_type_pcmu8000,0,NULL);
        linphone_core_assign_payload_type(&payload_type_gsm,3,NULL);
        linphone_core_assign_payload_type(&payload_type_pcma8000,8,NULL);
        linphone_core_assign_payload_type(&payload_type_lpc1015,115,NULL);
        linphone_core_assign_payload_type(&payload_type_speex_nb,110,"vbr=on");
        linphone_core_assign_payload_type(&payload_type_speex_wb,111,"vbr=on");
        linphone_core_assign_payload_type(&payload_type_speex_uwb,112,"vbr=on");
        linphone_core_assign_payload_type(&payload_type_telephone_event,101,"0-11");
        linphone_core_assign_payload_type(&payload_type_ilbc,113,"mode=30");
        linphone_core_assign_payload_type(&payload_type_amr,114,"octet-align=1");

#if defined(ANDROID) || defined (__IPHONE_OS_VERSION_MIN_REQUIRED)
        /*shorten the DNS lookup time and send more retransmissions on mobiles:
         - to workaround potential packet losses
         - to avoid hanging for 30 seconds when the network doesn't work despite the phone thinks it does.
         */
        _linphone_core_configure_resolver();
#endif

#ifdef ENABLE_NONSTANDARD_GSM
        {
                PayloadType *pt;
                pt=payload_type_clone(&payload_type_gsm);
                pt->clock_rate=11025;
                rtp_profile_set_payload(&av_profile,114,pt);
                linphone_payload_types=ms_list_append(linphone_payload_types,pt);
                pt=payload_type_clone(&payload_type_gsm);
                pt->clock_rate=22050;
                rtp_profile_set_payload(&av_profile,115,pt);
                linphone_payload_types=ms_list_append(linphone_payload_types,pt);
        }
#endif

#ifdef VIDEO_ENABLED
        linphone_core_assign_payload_type(&payload_type_h263,34,NULL);
        linphone_core_assign_payload_type(&payload_type_theora,97,NULL);
        linphone_core_assign_payload_type(&payload_type_h263_1998,98,"CIF=1;QCIF=1");
        linphone_core_assign_payload_type(&payload_type_mp4v,99,"profile-level-id=3");
        linphone_core_assign_payload_type(&payload_type_x_snow,100,NULL);
        linphone_core_assign_payload_type(&payload_type_h264,102,"profile-level-id=428014");
        /* due to limited space in SDP, we have to disable this h264 line which is normally no more necessary */
        /* linphone_core_assign_payload_type(&payload_type_h264,103,"packetization-mode=1;profile-level-id=428014");*/
#endif

        ms_init();
        /* create a mediastreamer2 event queue and set it as global */
        /* This allows to run event's callback in linphone_core_iterate() */
        lc->msevq=ms_event_queue_new();
        ms_set_global_event_queue(lc->msevq);

        lc->config=lp_config_new(config_path);
        if (factory_config_path)
                lp_config_read_file(lc->config,factory_config_path);

        lc->sal=sal_init();
        sal_set_user_pointer(lc->sal,lc);
        sal_set_callbacks(lc->sal,&linphone_sal_callbacks);
        
        sip_setup_register_all();
        sound_config_read(lc);
        net_config_read(lc);
        rtp_config_read(lc);
        codecs_config_read(lc);
        sip_config_read(lc); /* this will start eXosip*/
        video_config_read(lc);
        //autoreplier_config_init(&lc->autoreplier_conf);
        lc->presence_mode=LinphoneStatusOnline;
        misc_config_read(lc);
        ui_config_read(lc);
        if (lc->vtable.display_status)
                lc->vtable.display_status(lc,_("Ready"));
        lc->auto_net_state_mon=lc->sip_conf.auto_net_state_mon;
        linphone_core_set_state(lc,LinphoneGlobalOn,"Ready");
}

/**
 * Instanciates a LinphoneCore object.
 * @ingroup initializing
 * 
 * The LinphoneCore object is the primary handle for doing all phone actions.
 * It should be unique within your application.
 * @param vtable a LinphoneCoreVTable structure holding your application callbacks
 * @param config_path a path to a config file. If it does not exists it will be created.
 *        The config file is used to store all settings, call logs, friends, proxies... so that all these settings
 *             become persistent over the life of the LinphoneCore object.
 *             It is allowed to set a NULL config file. In that case LinphoneCore will not store any settings.
 * @param factory_config_path a path to a read-only config file that can be used to 
 *        to store hard-coded preference such as proxy settings or internal preferences.
 *        The settings in this factory file always override the one in the normal config file.
 *        It is OPTIONAL, use NULL if unneeded.
 * @param userdata an opaque user pointer that can be retrieved at any time (for example in
 *        callbacks) using linphone_core_get_user_data().
 * 
**/
LinphoneCore *linphone_core_new(const LinphoneCoreVTable *vtable,
                                                const char *config_path, const char *factory_config_path, void * userdata)
{
        LinphoneCore *core=ms_new(LinphoneCore,1);
        linphone_core_init(core,vtable,config_path, factory_config_path, userdata);
        return core;
}

/**
 * Returns the list of available audio codecs.
 *
 * This list is unmodifiable. The ->data field of the MSList points a PayloadType
 * structure holding the codec information.
 * It is possible to make copy of the list with ms_list_copy() in order to modify it
 * (such as the order of codecs).
**/
const MSList *linphone_core_get_audio_codecs(const LinphoneCore *lc)
{
        return lc->codecs_conf.audio_codecs;
}

/**
 * Returns the list of available video codecs.
 *
 * This list is unmodifiable. The ->data field of the MSList points a PayloadType
 * structure holding the codec information.
 * It is possible to make copy of the list with ms_list_copy() in order to modify it
 * (such as the order of codecs).
**/
const MSList *linphone_core_get_video_codecs(const LinphoneCore *lc)
{
        return lc->codecs_conf.video_codecs;
}

/**
 * Sets the local "from" identity.
 *
 * @ingroup proxies
 * This data is used in absence of any proxy configuration or when no
 * default proxy configuration is set. See LinphoneProxyConfig
**/
int linphone_core_set_primary_contact(LinphoneCore *lc, const char *contact)
{
        LinphoneAddress *ctt;

        if ((ctt=linphone_address_new(contact))==0) {
                ms_error("Bad contact url: %s",contact);
                return -1;
        }
        if (lc->sip_conf.contact!=NULL) ms_free(lc->sip_conf.contact);
        lc->sip_conf.contact=ms_strdup(contact);
        if (lc->sip_conf.guessed_contact!=NULL){
                ms_free(lc->sip_conf.guessed_contact);
                lc->sip_conf.guessed_contact=NULL;
        }
        linphone_address_destroy(ctt);
        return 0;
}


/*result must be an array of chars at least LINPHONE_IPADDR_SIZE */
void linphone_core_get_local_ip(LinphoneCore *lc, const char *dest, char *result){
        const char *ip;
        if (linphone_core_get_firewall_policy(lc)==LinphonePolicyUseNatAddress
            && (ip=linphone_core_get_nat_address_resolved(lc))!=NULL){
                strncpy(result,ip,LINPHONE_IPADDR_SIZE);
                return;
        }
        if (linphone_core_get_local_ip_for(lc->sip_conf.ipv6_enabled ? AF_INET6 : AF_INET,dest,result)==0)
                return;
        /*else fallback to SAL routine that will attempt to find the most realistic interface */
        sal_get_default_local_ip(lc->sal,lc->sip_conf.ipv6_enabled ? AF_INET6 : AF_INET,result,LINPHONE_IPADDR_SIZE);
}

static void update_primary_contact(LinphoneCore *lc){
        char *guessed=NULL;
        char tmp[LINPHONE_IPADDR_SIZE];

        LinphoneAddress *url;
        if (lc->sip_conf.guessed_contact!=NULL){
                ms_free(lc->sip_conf.guessed_contact);
                lc->sip_conf.guessed_contact=NULL;
        }
        url=linphone_address_new(lc->sip_conf.contact);
        if (!url){
                ms_error("Could not parse identity contact !");
                url=linphone_address_new("sip:unknown@unkwownhost");
        }
        linphone_core_get_local_ip(lc, NULL, tmp);
        if (strcmp(tmp,"127.0.0.1")==0 || strcmp(tmp,"::1")==0 ){
                ms_warning("Local loopback network only !");
                lc->sip_conf.loopback_only=TRUE;
        }else lc->sip_conf.loopback_only=FALSE;
        linphone_address_set_domain(url,tmp);
        linphone_address_set_port_int(url,linphone_core_get_sip_port (lc));
        guessed=linphone_address_as_string(url);
        lc->sip_conf.guessed_contact=guessed;
        linphone_address_destroy(url);
}

/**
 * Returns the default identity when no proxy configuration is used.
 *
 * @ingroup proxies
**/
const char *linphone_core_get_primary_contact(LinphoneCore *lc){
        char *identity;
        
        if (lc->sip_conf.guess_hostname){
                if (lc->sip_conf.guessed_contact==NULL || lc->sip_conf.loopback_only){
                        update_primary_contact(lc);
                }
                identity=lc->sip_conf.guessed_contact;
        }else{
                identity=lc->sip_conf.contact;
        }
        return identity;
}

/**
 * Tells LinphoneCore to guess local hostname automatically in primary contact.
 *
 * @ingroup proxies
**/
void linphone_core_set_guess_hostname(LinphoneCore *lc, bool_t val){
        lc->sip_conf.guess_hostname=val;
}

/**
 * Returns TRUE if hostname part of primary contact is guessed automatically.
 *
 * @ingroup proxies
**/
bool_t linphone_core_get_guess_hostname(LinphoneCore *lc){
        return lc->sip_conf.guess_hostname;
}

/**
 * Same as linphone_core_get_primary_contact() but the result is a LinphoneAddress object
 * instead of const char*
 *
 * @ingroup proxies
**/
LinphoneAddress *linphone_core_get_primary_contact_parsed(LinphoneCore *lc){
        return linphone_address_new(linphone_core_get_primary_contact(lc));
}

/**
 * Sets the list of audio codecs.
 *
 * @ingroup media_parameters
 * The list is taken by the LinphoneCore thus the application should not free it.
 * This list is made of struct PayloadType describing the codec parameters.
**/
int linphone_core_set_audio_codecs(LinphoneCore *lc, MSList *codecs)
{
        if (lc->codecs_conf.audio_codecs!=NULL) ms_list_free(lc->codecs_conf.audio_codecs);
        lc->codecs_conf.audio_codecs=codecs;
        return 0;
}

/**
 * Sets the list of video codecs.
 *
 * @ingroup media_parameters
 * The list is taken by the LinphoneCore thus the application should not free it.
 * This list is made of struct PayloadType describing the codec parameters.
**/
int linphone_core_set_video_codecs(LinphoneCore *lc, MSList *codecs)
{
        if (lc->codecs_conf.video_codecs!=NULL) ms_list_free(lc->codecs_conf.video_codecs);
        lc->codecs_conf.video_codecs=codecs;
        return 0;
}

const MSList * linphone_core_get_friend_list(const LinphoneCore *lc)
{
        return lc->friends;
}

/**
 * Returns the nominal jitter buffer size in milliseconds.
 *
 * @ingroup media_parameters
**/
int linphone_core_get_audio_jittcomp(LinphoneCore *lc)
{
        return lc->rtp_conf.audio_jitt_comp;
}

/**
 * Returns the UDP port used for audio streaming.
 *
 * @ingroup network_parameters
**/
int linphone_core_get_audio_port(const LinphoneCore *lc)
{
        return lc->rtp_conf.audio_rtp_port;
}

/**
 * Returns the UDP port used for video streaming.
 *
 * @ingroup network_parameters
**/
int linphone_core_get_video_port(const LinphoneCore *lc){
        return lc->rtp_conf.video_rtp_port;
}


/**
 * Returns the value in seconds of the no-rtp timeout.
 *
 * @ingroup media_parameters
 * When no RTP or RTCP packets have been received for a while
 * LinphoneCore will consider the call is broken (remote end crashed or
 * disconnected from the network), and thus will terminate the call.
 * The no-rtp timeout is the duration above which the call is considered broken.
**/
int linphone_core_get_nortp_timeout(const LinphoneCore *lc){
        return lc->rtp_conf.nortp_timeout;
}

bool_t linphone_core_get_rtp_no_xmit_on_audio_mute(const LinphoneCore *lc){
        return lc->rtp_conf.rtp_no_xmit_on_audio_mute;
}

/**
 * Sets the nominal audio jitter buffer size in milliseconds.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_audio_jittcomp(LinphoneCore *lc, int value)
{
        lc->rtp_conf.audio_jitt_comp=value;
}

void linphone_core_set_rtp_no_xmit_on_audio_mute(LinphoneCore *lc,bool_t rtp_no_xmit_on_audio_mute){
        lc->rtp_conf.rtp_no_xmit_on_audio_mute=rtp_no_xmit_on_audio_mute;
}

/**
 * Sets the UDP port used for audio streaming.
 *
 * @ingroup network_parameters
**/
void linphone_core_set_audio_port(LinphoneCore *lc, int port)
{
        lc->rtp_conf.audio_rtp_port=port;
}

/**
 * Sets the UDP port used for video streaming.
 *
 * @ingroup network_parameters
**/
void linphone_core_set_video_port(LinphoneCore *lc, int port){
        lc->rtp_conf.video_rtp_port=port;
}

/**
 * Sets the no-rtp timeout value in seconds.
 * 
 * @ingroup media_parameters
 * See linphone_core_get_nortp_timeout() for details.
**/
void linphone_core_set_nortp_timeout(LinphoneCore *lc, int nortp_timeout){
        lc->rtp_conf.nortp_timeout=nortp_timeout;
}

/**
 * Indicates whether SIP INFO is used for sending digits.
 *
 * @ingroup media_parameters
**/
bool_t linphone_core_get_use_info_for_dtmf(LinphoneCore *lc)
{
        return lc->sip_conf.use_info;
}

/**
 * Sets whether SIP INFO is to be used for sending digits.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_use_info_for_dtmf(LinphoneCore *lc,bool_t use_info)
{
        lc->sip_conf.use_info=use_info;
}

/**
 * Indicates whether RFC2833 is used for sending digits.
 *
 * @ingroup media_parameters
**/
bool_t linphone_core_get_use_rfc2833_for_dtmf(LinphoneCore *lc)
{
        return lc->sip_conf.use_rfc2833;
}

/**
 * Sets whether RFC2833 is to be used for sending digits.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_use_rfc2833_for_dtmf(LinphoneCore *lc,bool_t use_rfc2833)
{
        lc->sip_conf.use_rfc2833=use_rfc2833;
}

/**
 * Returns the UDP port used by SIP.
 *
 * Deprecated: use linphone_core_get_sip_transports() instead.
 * @ingroup network_parameters
**/
int linphone_core_get_sip_port(LinphoneCore *lc)
{
        LCSipTransports *tr=&lc->sip_conf.transports;
        return tr->udp_port>0 ? tr->udp_port : tr->tcp_port;
}

static char _ua_name[64]="Linphone";
static char _ua_version[64]=LINPHONE_VERSION;

#ifdef HAVE_EXOSIP_GET_VERSION
extern const char *eXosip_get_version();
#endif

static void apply_user_agent(LinphoneCore *lc){
        char ua_string[256];
        snprintf(ua_string,sizeof(ua_string)-1,"%s/%s (eXosip2/%s)",_ua_name,_ua_version,
#ifdef HAVE_EXOSIP_GET_VERSION
                 eXosip_get_version()
#else
                 "unknown"
#endif
        );
        if (lc->sal) sal_set_user_agent(lc->sal,ua_string);
}

/**
 * Sets the user agent string used in SIP messages.
 *
 * @ingroup misc
**/
void linphone_core_set_user_agent(const char *name, const char *ver){
        strncpy(_ua_name,name,sizeof(_ua_name)-1);
        strncpy(_ua_version,ver,sizeof(_ua_version));
}

static void transport_error(LinphoneCore *lc, const char* transport, int port){
        char *msg=ortp_strdup_printf("Could not start %s transport on port %i, maybe this port is already used.",transport,port);
        ms_warning(msg);
        if (lc->vtable.display_warning)
                lc->vtable.display_warning(lc,msg);
        ms_free(msg);
}

static bool_t transports_unchanged(const LCSipTransports * tr1, const LCSipTransports * tr2){
        return
                tr2->udp_port==tr1->udp_port &&
                tr2->tcp_port==tr1->tcp_port &&
                tr2->dtls_port==tr1->dtls_port &&
                tr2->tls_port==tr1->tls_port;
}

static int apply_transports(LinphoneCore *lc){
        Sal *sal=lc->sal;
        const char *anyaddr;
        LCSipTransports *tr=&lc->sip_conf.transports;

        if (lc->sip_conf.ipv6_enabled)
                anyaddr="::0";
        else
                anyaddr="0.0.0.0";

        sal_unlisten_ports (sal);
        if (tr->udp_port>0){
                if (sal_listen_port (sal,anyaddr,tr->udp_port,SalTransportDatagram,FALSE)!=0){
                        transport_error(lc,"UDP",tr->udp_port);
                        return -1;
                }
        }
        if (tr->tcp_port>0){
                if (sal_listen_port (sal,anyaddr,tr->tcp_port,SalTransportStream,FALSE)!=0){
                        transport_error(lc,"TCP",tr->tcp_port);
                }
        }
        apply_user_agent(lc);
        return 0;
}

/**
 * Sets the ports to be used for each of transport (UDP or TCP)
 *
 * A zero value port for a given transport means the transport
 * is not used.
 *
 * @ingroup network_parameters
**/
int linphone_core_set_sip_transports(LinphoneCore *lc, const LCSipTransports * tr){
        
        if (transports_unchanged(tr,&lc->sip_conf.transports))
                return 0;
        memcpy(&lc->sip_conf.transports,tr,sizeof(*tr));
        
        if (lc->sal==NULL) return 0;
        return apply_transports(lc);
}

/**
 * Retrieves the ports used for each transport (udp, tcp).
 * A zero value port for a given transport means the transport
 * is not used.
 * @ingroup network_parameters
**/
int linphone_core_get_sip_transports(LinphoneCore *lc, LCSipTransports *tr){
        memcpy(tr,&lc->sip_conf.transports,sizeof(*tr));
        return 0;
}

/**
 * Sets the UDP port to be used by SIP.
 *
 * Deprecated: use linphone_core_set_sip_transports() instead.
 * @ingroup network_parameters
**/
void linphone_core_set_sip_port(LinphoneCore *lc,int port)
{
        LCSipTransports tr;
        memset(&tr,0,sizeof(tr));
        tr.udp_port=port;
        linphone_core_set_sip_transports (lc,&tr);
}

/**
 * Returns TRUE if IPv6 is enabled.
 *
 * @ingroup network_parameters
 * See linphone_core_enable_ipv6() for more details on how IPv6 is supported in liblinphone.
**/
bool_t linphone_core_ipv6_enabled(LinphoneCore *lc){
        return lc->sip_conf.ipv6_enabled;
}

/**
 * Turns IPv6 support on or off.
 *
 * @ingroup network_parameters
 *
 * @note IPv6 support is exclusive with IPv4 in liblinphone:
 * when IPv6 is turned on, IPv4 calls won't be possible anymore.
 * By default IPv6 support is off.
**/
void linphone_core_enable_ipv6(LinphoneCore *lc, bool_t val){
        if (lc->sip_conf.ipv6_enabled!=val){
                lc->sip_conf.ipv6_enabled=val;
                if (lc->sal){
                        /* we need to restart eXosip */
                        apply_transports(lc);
                }
        }
}


static void monitor_network_state(LinphoneCore *lc, time_t curtime){
        static time_t last_check=0;
        static bool_t last_status=FALSE;
        char result[LINPHONE_IPADDR_SIZE];
        bool_t new_status=last_status;

        /* only do the network up checking every five seconds */
        if (last_check==0 || (curtime-last_check)>=5){
                linphone_core_get_local_ip_for(lc->sip_conf.ipv6_enabled ? AF_INET6 : AF_INET,NULL,result);
                if (strcmp(result,"::1")!=0 && strcmp(result,"127.0.0.1")!=0){
                        new_status=TRUE;
                }else new_status=FALSE;
                last_check=curtime;
                if (new_status!=last_status) {
                        if (new_status){
                                ms_message("New local ip address is %s",result);
                        }
                        set_network_reachable(lc,new_status, curtime);
                        last_status=new_status;
                }
        }
}

static void proxy_update(LinphoneCore *lc){
        ms_list_for_each(lc->sip_conf.proxies,(void (*)(void*))&linphone_proxy_config_update);
        MSList* list=ms_list_copy(lc->sip_conf.deleted_proxies);
        for(;list!=NULL;list=list->next){
                LinphoneProxyConfig* cfg = (LinphoneProxyConfig*) list->data;
                if (ms_time(NULL) - cfg->deletion_date > 5) {
                        lc->sip_conf.deleted_proxies =ms_list_remove(lc->sip_conf.deleted_proxies,(void *)cfg);
                        ms_message("clearing proxy config for [%s]",linphone_proxy_config_get_addr(cfg));
                        linphone_proxy_config_destroy(cfg);
                }
        }
        ms_list_free(list);
}

static void assign_buddy_info(LinphoneCore *lc, BuddyInfo *info){
        LinphoneFriend *lf=linphone_core_get_friend_by_address(lc,info->sip_uri);
        if (lf!=NULL){
                lf->info=info;
                ms_message("%s has a BuddyInfo assigned with image %p",info->sip_uri, info->image_data);
                if (lc->vtable.buddy_info_updated)
                        lc->vtable.buddy_info_updated(lc,lf);
        }else{
                ms_warning("Could not any friend with uri %s",info->sip_uri);
        }
}

static void analyze_buddy_lookup_results(LinphoneCore *lc, LinphoneProxyConfig *cfg){
        MSList *elem;
        SipSetupContext *ctx=linphone_proxy_config_get_sip_setup_context(cfg);
        for (elem=lc->bl_reqs;elem!=NULL;elem=ms_list_next(elem)){
                BuddyLookupRequest *req=(BuddyLookupRequest *)elem->data;
                if (req->status==BuddyLookupDone || req->status==BuddyLookupFailure){
                        if (req->results!=NULL){
                                BuddyInfo *i=(BuddyInfo*)req->results->data;
                                ms_list_free(req->results);
                                req->results=NULL;
                                assign_buddy_info(lc,i);
                        }
                        sip_setup_context_buddy_lookup_free(ctx,req);
                        elem->data=NULL;
                }
        }
        /*purge completed requests */
        while((elem=ms_list_find(lc->bl_reqs,NULL))!=NULL){
                lc->bl_reqs=ms_list_remove_link(lc->bl_reqs,elem);
        }
}

static void linphone_core_grab_buddy_infos(LinphoneCore *lc, LinphoneProxyConfig *cfg){
        const MSList *elem;
        SipSetupContext *ctx=linphone_proxy_config_get_sip_setup_context(cfg);
        for(elem=linphone_core_get_friend_list(lc);elem!=NULL;elem=elem->next){
                LinphoneFriend *lf=(LinphoneFriend*)elem->data;
                if (lf->info==NULL){
                        if (linphone_core_lookup_known_proxy(lc,lf->uri)==cfg){
                                if (linphone_address_get_username(lf->uri)!=NULL){
                                        BuddyLookupRequest *req;
                                        char *tmp=linphone_address_as_string_uri_only(lf->uri);
                                        req=sip_setup_context_create_buddy_lookup_request(ctx);
                                        buddy_lookup_request_set_key(req,tmp);
                                        buddy_lookup_request_set_max_results(req,1);
                                        sip_setup_context_buddy_lookup_submit(ctx,req);
                                        lc->bl_reqs=ms_list_append(lc->bl_reqs,req);
                                        ms_free(tmp);
                                }
                        }
                }
        }
}

static void linphone_core_do_plugin_tasks(LinphoneCore *lc){
        LinphoneProxyConfig *cfg=NULL;
        linphone_core_get_default_proxy(lc,&cfg);
        if (cfg){
                if (lc->bl_refresh){
                        SipSetupContext *ctx=linphone_proxy_config_get_sip_setup_context(cfg);
                        if (ctx && (sip_setup_context_get_capabilities(ctx) & SIP_SETUP_CAP_BUDDY_LOOKUP)){
                                linphone_core_grab_buddy_infos(lc,cfg);
                                lc->bl_refresh=FALSE;
                        }
                }
                if (lc->bl_reqs) analyze_buddy_lookup_results(lc,cfg);
        }
}

/**
 * Main loop function. It is crucial that your application call it periodically.
 *
 * @ingroup initializing
 * linphone_core_iterate() performs various backgrounds tasks:
 * - receiving of SIP messages
 * - handles timers and timeout
 * - performs registration to proxies
 * - authentication retries
 * The application MUST call this function periodically, in its main loop.
 * Be careful that this function must be called from the same thread as
 * other liblinphone methods. If it is not the case make sure all liblinphone calls are
 * serialized with a mutex.
**/
void linphone_core_iterate(LinphoneCore *lc){
        MSList *calls;
        LinphoneCall *call;
        time_t curtime=time(NULL);
        int elapsed;
        bool_t one_second_elapsed=FALSE;

        if (curtime-lc->prevtime>=1){
                lc->prevtime=curtime;
                one_second_elapsed=TRUE;
        }

        if (lc->ecc!=NULL){
                LinphoneEcCalibratorStatus ecs=ec_calibrator_get_status(lc->ecc);
                if (ecs!=LinphoneEcCalibratorInProgress){
                        if (lc->ecc->cb)
                                lc->ecc->cb(lc,ecs,lc->ecc->delay,lc->ecc->cb_data);
                        if (ecs==LinphoneEcCalibratorDone){
                                lp_config_set_int(lc->config, "sound", "ec_delay",MAX(lc->ecc->delay-10,0));
                        }
                        ec_calibrator_destroy(lc->ecc);
                        lc->ecc=NULL;
                }
        }

        if (lc->preview_finished){
                lc->preview_finished=0;
                ring_stop(lc->ringstream);
                lc->ringstream=NULL;
                lc_callback_obj_invoke(&lc->preview_finished_cb,lc);
        }

        if (lc->ringstream && lc->ringstream_autorelease && lc->dmfs_playing_start_time!=0 
            && (curtime-lc->dmfs_playing_start_time)>5){
                ring_stop(lc->ringstream);
                lc->ringstream=NULL;
                lc->dmfs_playing_start_time=0;
        }

        sal_iterate(lc->sal);
        if (lc->msevq) ms_event_queue_pump(lc->msevq);
        if (lc->auto_net_state_mon) monitor_network_state(lc,curtime);

        proxy_update(lc);

        //we have to iterate for each call
        calls= lc->calls;
        while(calls!= NULL){
                call = (LinphoneCall *)calls->data;
                 /* get immediately a reference to next one in case the one
                 we are going to examine is destroy and removed during
                 linphone_core_start_invite() */
                calls=calls->next;
                if (call->state==LinphoneCallOutgoingInit && (curtime-call->start_time>=2)){
                                /*start the call even if the OPTIONS reply did not arrive*/
                                linphone_core_start_invite(lc,call,NULL);
                        }
                if (call->dir==LinphoneCallIncoming && call->state==LinphoneCallOutgoingRinging){
                        elapsed=curtime-call->start_time;
                        ms_message("incoming call ringing for %i seconds",elapsed);
                        if (elapsed>lc->sip_conf.inc_timeout){
                                call->log->status=LinphoneCallMissed;
                                linphone_core_terminate_call(lc,call);
                        }
                }
        }
        call = linphone_core_get_current_call(lc);
        if(call)
                linphone_call_background_tasks(call,one_second_elapsed);
        if (linphone_core_video_preview_enabled(lc)){
                if (lc->previewstream==NULL && lc->calls==NULL)
                        toggle_video_preview(lc,TRUE);
#ifdef VIDEO_ENABLED
                if (lc->previewstream) video_stream_iterate(lc->previewstream);
#endif
        }else{
                if (lc->previewstream!=NULL)
                        toggle_video_preview(lc,FALSE);
        }

        linphone_core_run_hooks(lc);
        linphone_core_do_plugin_tasks(lc);

        if (lc->initial_subscribes_sent==FALSE && lc->netup_time!=0 &&
            (curtime-lc->netup_time)>3){
                linphone_core_send_initial_subscribes(lc);
                lc->initial_subscribes_sent=TRUE;
        }

        if (one_second_elapsed && lp_config_needs_commit(lc->config)){
                lp_config_sync(lc->config);
        }
}

/**
 * Interpret a call destination as supplied by the user, and returns a fully qualified
 * LinphoneAddress.
 *
 * A sip address should look like DisplayName <sip:username@domain:port> .
 * Basically this function performs the following tasks
 * - if a phone number is entered, prepend country prefix of the default proxy
 *   configuration, eventually escape the '+' by 00.
 * - if no domain part is supplied, append the domain name of the default proxy
 * - if no sip: is present, prepend it
 * 
 * The result is a syntaxically correct SIP address.
**/

LinphoneAddress * linphone_core_interpret_url(LinphoneCore *lc, const char *url){
        enum_lookup_res_t *enumres=NULL;
        char *enum_domain=NULL;
        LinphoneProxyConfig *proxy=lc->default_proxy;;
        char *tmpurl;
        LinphoneAddress *uri;
        
        if (is_enum(url,&enum_domain)){
                if (lc->vtable.display_status!=NULL)
                        lc->vtable.display_status(lc,_("Looking for telephone number destination..."));
                if (enum_lookup(enum_domain,&enumres)<0){
                        if (lc->vtable.display_status!=NULL)
                                lc->vtable.display_status(lc,_("Could not resolve this number."));
                        ms_free(enum_domain);
                        return NULL;
                }
                ms_free(enum_domain);
                tmpurl=enumres->sip_address[0];
                uri=linphone_address_new(tmpurl);
                enum_lookup_res_free(enumres);
                return uri;
        }
        /* check if we have a "sip:" */
        if (strstr(url,"sip:")==NULL){
                /* this doesn't look like a true sip uri */
                if (strchr(url,'@')!=NULL){
                        /* seems like sip: is missing !*/
                        tmpurl=ms_strdup_printf("sip:%s",url);
                        uri=linphone_address_new(tmpurl);
                        ms_free(tmpurl);
                        if (uri){
                                return uri;
                        }
                }
                
                if (proxy!=NULL){
                        /* append the proxy domain suffix */
                        const char *identity=linphone_proxy_config_get_identity(proxy);
                        char normalized_username[128];
                        uri=linphone_address_new(identity);
                        if (uri==NULL){
                                return NULL;
                        }
                        linphone_address_set_display_name(uri,NULL);
                        linphone_proxy_config_normalize_number(proxy,url,normalized_username,
                                                                sizeof(normalized_username));
                        linphone_address_set_username(uri,normalized_username);
                        return uri;
                }else return NULL;
        }
        uri=linphone_address_new(url);
        if (uri!=NULL){
                return uri;
        }
        /* else we could not do anything with url given by user, so display an error */
        if (lc->vtable.display_warning!=NULL){
                lc->vtable.display_warning(lc,_("Could not parse given sip address. A sip url usually looks like sip:user@domain"));
        }
        return NULL;
}

/**
 * Returns the default identity SIP address.
 *
 * @ingroup proxies
 * This is an helper function:
 *
 * If no default proxy is set, this will return the primary contact (
 * see linphone_core_get_primary_contact() ). If a default proxy is set
 * it returns the registered identity on the proxy.
**/
const char * linphone_core_get_identity(LinphoneCore *lc){
        LinphoneProxyConfig *proxy=NULL;
        const char *from;
        linphone_core_get_default_proxy(lc,&proxy);
        if (proxy!=NULL) {
                from=linphone_proxy_config_get_identity(proxy);
        }else from=linphone_core_get_primary_contact(lc);
        return from;
}

const char * linphone_core_get_route(LinphoneCore *lc){
        LinphoneProxyConfig *proxy=NULL;
        const char *route=NULL;
        linphone_core_get_default_proxy(lc,&proxy);
        if (proxy!=NULL) {
                route=linphone_proxy_config_get_route(proxy);
        }
        return route;
}

void linphone_core_start_refered_call(LinphoneCore *lc, LinphoneCall *call){
        if (call->refer_pending){
                LinphoneCallParams *cp=linphone_core_create_default_call_parameters(lc);
                cp->referer=call;
                ms_message("Starting new call to refered address %s",call->refer_to);
                call->refer_pending=FALSE;
                linphone_core_invite_with_params(lc,call->refer_to,cp);
                linphone_call_params_destroy(cp);
        }
}

LinphoneProxyConfig * linphone_core_lookup_known_proxy(LinphoneCore *lc, const LinphoneAddress *uri){
        const MSList *elem;
        LinphoneProxyConfig *found_cfg=NULL;
        for (elem=linphone_core_get_proxy_config_list(lc);elem!=NULL;elem=elem->next){
                LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)elem->data;
                const char *domain=linphone_proxy_config_get_domain(cfg);
                if (domain!=NULL && strcmp(domain,linphone_address_get_domain(uri))==0){
                        found_cfg=cfg;
                        break;
                }
        }
        return found_cfg;
}

const char *linphone_core_find_best_identity(LinphoneCore *lc, const LinphoneAddress *to, const char **route){
        LinphoneProxyConfig *cfg=linphone_core_lookup_known_proxy(lc,to);
        if (cfg==NULL)
                linphone_core_get_default_proxy (lc,&cfg);
        if (cfg!=NULL){
                if (route) *route=linphone_proxy_config_get_route(cfg);
                return linphone_proxy_config_get_identity (cfg);
        }
        return linphone_core_get_primary_contact (lc);
}

static char *get_fixed_contact(LinphoneCore *lc, LinphoneCall *call , LinphoneProxyConfig *dest_proxy){
        LinphoneAddress *ctt;
        const char *localip=call->localip;

        /* first use user's supplied ip address if asked*/
        if (linphone_core_get_firewall_policy(lc)==LinphonePolicyUseNatAddress){
                ctt=linphone_core_get_primary_contact_parsed(lc);
                return ms_strdup_printf("sip:%s@%s",linphone_address_get_username(ctt),
                        linphone_core_get_nat_address_resolved(lc));
        }

        /* if already choosed, don't change it */
        if (call->op && sal_op_get_contact(call->op)!=NULL){
                return NULL;
        }
        /* if the ping OPTIONS request succeeded use the contact guessed from the
         received, rport*/
        if (call->ping_op){
                const char *guessed=sal_op_get_contact(call->ping_op);
                if (guessed){
                        ms_message("Contact has been fixed using OPTIONS to %s",guessed);
                        return ms_strdup(guessed);
                }
        }

        /*if using a proxy, use the contact address as guessed with the REGISTERs*/
        if (dest_proxy && dest_proxy->op){
                const char *fixed_contact=sal_op_get_contact(dest_proxy->op);
                if (fixed_contact) {
                        ms_message("Contact has been fixed using proxy to %s",fixed_contact);
                        return ms_strdup(fixed_contact);
                }
        }
        
        ctt=linphone_core_get_primary_contact_parsed(lc);
        
        if (ctt!=NULL){
                char *ret;
                /*otherwise use supllied localip*/
                linphone_address_set_domain(ctt,localip);
                linphone_address_set_port_int(ctt,linphone_core_get_sip_port(lc));
                ret=linphone_address_as_string_uri_only(ctt);
                linphone_address_destroy(ctt);
                ms_message("Contact has been fixed using local ip to %s",ret);
                return ret;
        }
        return NULL;
}

int linphone_core_start_invite(LinphoneCore *lc, LinphoneCall *call, LinphoneProxyConfig *dest_proxy){
        int err;
        char *contact;
        char *real_url,*barmsg;
        char *from;
        
        /*try to be best-effort in giving real local or routable contact address */
        contact=get_fixed_contact(lc,call,dest_proxy);
        if (contact){
                sal_op_set_contact(call->op, contact);
                ms_free(contact);
        }
        
        //TODO : should probably not be done here
        linphone_call_init_media_streams(call);
        if (!lc->sip_conf.sdp_200_ack){ 
                call->media_pending=TRUE;
                sal_call_set_local_media_description(call->op,call->localdesc);
        }
        real_url=linphone_address_as_string(call->log->to);
        from=linphone_address_as_string(call->log->from);
        err=sal_call(call->op,from,real_url);

        if (lc->sip_conf.sdp_200_ack){
                call->media_pending=TRUE;
                sal_call_set_local_media_description(call->op,call->localdesc);
        }
        barmsg=ortp_strdup_printf("%s %s", _("Contacting"), real_url);
        if (lc->vtable.display_status!=NULL)
                lc->vtable.display_status(lc,barmsg);
        ms_free(barmsg);
        
        if (err<0){
                if (lc->vtable.display_status!=NULL)
                        lc->vtable.display_status(lc,_("Could not call"));
                linphone_call_stop_media_streams(call);
                linphone_call_set_state(call,LinphoneCallError,"Call failed");
        }else {
                linphone_call_set_state(call,LinphoneCallOutgoingProgress,"Outgoing call in progress");
        }
        ms_free(real_url);
        ms_free(from);
        return err;
}

/**
 * Initiates an outgoing call
 *
 * @ingroup call_control
 * @param lc the LinphoneCore object
 * @param url the destination of the call (sip address, or phone number).
 *
 * The application doesn't own a reference to the returned LinphoneCall object.
 * Use linphone_call_ref() to safely keep the LinphoneCall pointer valid within your application.
 *
 * @return a LinphoneCall object or NULL in case of failure
**/
LinphoneCall * linphone_core_invite(LinphoneCore *lc, const char *url){
        LinphoneCall *call;
        LinphoneCallParams *p=linphone_core_create_default_call_parameters (lc);
        call=linphone_core_invite_with_params(lc,url,p);
        linphone_call_params_destroy(p);
        return call;
}


/**
 * Initiates an outgoing call according to supplied call parameters
 *
 * @ingroup call_control
 * @param lc the LinphoneCore object
 * @param url the destination of the call (sip address, or phone number).
 * @param p call parameters
 *
 * The application doesn't own a reference to the returned LinphoneCall object.
 * Use linphone_call_ref() to safely keep the LinphoneCall pointer valid within your application.
 *
 * @return a LinphoneCall object or NULL in case of failure
**/
LinphoneCall * linphone_core_invite_with_params(LinphoneCore *lc, const char *url, const LinphoneCallParams *p){
        LinphoneAddress *addr=linphone_core_interpret_url(lc,url);
        if (addr){
                LinphoneCall *call;
                call=linphone_core_invite_address_with_params(lc,addr,p);
                linphone_address_destroy(addr);
                return call;
        }
        return NULL;
}

/**
 * Initiates an outgoing call given a destination LinphoneAddress
 *
 * @ingroup call_control
 * @param lc the LinphoneCore object
 * @param addr the destination of the call (sip address).
 * 
 * The LinphoneAddress can be constructed directly using linphone_address_new(), or
 * created by linphone_core_interpret_url().
 * The application doesn't own a reference to the returned LinphoneCall object.
 * Use linphone_call_ref() to safely keep the LinphoneCall pointer valid within your application.
 *
 * @return a LinphoneCall object or NULL in case of failure
**/
LinphoneCall * linphone_core_invite_address(LinphoneCore *lc, const LinphoneAddress *addr){
        LinphoneCall *call;
        LinphoneCallParams *p=linphone_core_create_default_call_parameters (lc);
        call=linphone_core_invite_address_with_params (lc,addr,p);
        linphone_call_params_destroy(p);
        return call;
}


/**
 * Initiates an outgoing call given a destination LinphoneAddress
 *
 * @ingroup call_control
 * @param lc the LinphoneCore object
 * @param addr the destination of the call (sip address).
        @param params call parameters
 * 
 * The LinphoneAddress can be constructed directly using linphone_address_new(), or
 * created by linphone_core_interpret_url().
 * The application doesn't own a reference to the returned LinphoneCall object.
 * Use linphone_call_ref() to safely keep the LinphoneCall pointer valid within your application.
 *
 * @return a LinphoneCall object or NULL in case of failure
**/
LinphoneCall * linphone_core_invite_address_with_params(LinphoneCore *lc, const LinphoneAddress *addr, const LinphoneCallParams *params)
{
        int err=0;
        const char *route=NULL;
        const char *from=NULL;
        LinphoneProxyConfig *proxy=NULL;
        LinphoneAddress *parsed_url2=NULL;
        char *real_url=NULL;
        LinphoneProxyConfig *dest_proxy=NULL;
        LinphoneCall *call;
        
        if (linphone_core_in_call(lc)){
                if (lc->vtable.display_warning)
                        lc->vtable.display_warning(lc,_("Sorry, you have to pause or stop the current call first !"));
                return NULL;
        }
        if(!linphone_core_can_we_add_call(lc)){
                if (lc->vtable.display_warning)
                        lc->vtable.display_warning(lc,_("Sorry, we have reached the maximum number of simultaneous calls"));
                return NULL;
        }
        linphone_core_get_default_proxy(lc,&proxy);
        route=linphone_core_get_route(lc);
        
        real_url=linphone_address_as_string(addr);
        dest_proxy=linphone_core_lookup_known_proxy(lc,addr);

        if (proxy!=dest_proxy && dest_proxy!=NULL) {
                ms_message("Overriding default proxy setting for this call:");
                ms_message("The used identity will be %s",linphone_proxy_config_get_identity(dest_proxy));
        }

        if (dest_proxy!=NULL)
                from=linphone_proxy_config_get_identity(dest_proxy);
        else if (proxy!=NULL)
                from=linphone_proxy_config_get_identity(proxy);

        /* if no proxy or no identity defined for this proxy, default to primary contact*/
        if (from==NULL) from=linphone_core_get_primary_contact(lc);

        parsed_url2=linphone_address_new(from);

        call=linphone_call_new_outgoing(lc,parsed_url2,linphone_address_clone(addr),params);
        sal_op_set_route(call->op,route);
        
        if(linphone_core_add_call(lc,call)!= 0)
        {
                ms_warning("we had a problem in adding the call into the invite ... weird");
                linphone_call_unref(call);
                return NULL;
        }
        /* this call becomes now the current one*/
        lc->current_call=call;
        linphone_call_set_state (call,LinphoneCallOutgoingInit,"Starting outgoing call");
        if (dest_proxy!=NULL || lc->sip_conf.ping_with_options==FALSE){
                err=linphone_core_start_invite(lc,call,dest_proxy);
        }else{
                /*defer the start of the call after the OPTIONS ping*/
                call->ping_op=sal_op_new(lc->sal);
                sal_ping(call->ping_op,from,real_url);
                sal_op_set_user_pointer(call->ping_op,call);
                call->start_time=time(NULL);
        }
        
        if (real_url!=NULL) ms_free(real_url);
        return call;
}

/**
 * Performs a simple call transfer to the specified destination.
 *
 * The remote endpoint is expected to issue a new call to the specified destination.
 * The current call remains active and thus can be later paused or terminated.
**/
int linphone_core_transfer_call(LinphoneCore *lc, LinphoneCall *call, const char *url)
{
        char *real_url=NULL;
        LinphoneAddress *real_parsed_url=linphone_core_interpret_url(lc,url);

        if (!real_parsed_url){
                /* bad url */
                return -1;
        }
        if (call==NULL){
                ms_warning("No established call to refer.");
                return -1;
        }
        //lc->call=NULL; //Do not do that you will lose the call afterward . . .
        real_url=linphone_address_as_string (real_parsed_url);
        sal_call_refer(call->op,real_url);
        ms_free(real_url);
        linphone_address_destroy(real_parsed_url);
        return 0;
}

/**
 * Transfer a call to destination of another running call. This is used for "attended transfer" scenarios.
 * @param lc linphone core object
 * @param call a running call you want to transfer
 * @param dest a running call whose remote person will receive the transfer
 *
 * The transfered call is supposed to be in paused state, so that it is able to accept the transfer immediately.
 * The destination call is a call previously established to introduce the transfered person.
 * This method will send a transfer request to the transfered person. The phone of the transfered is then
 * expected to automatically call to the destination of the transfer. The receiver of the transfer will then automatically
 * close the call with us (the 'dest' call).
**/
int linphone_core_transfer_call_to_another(LinphoneCore *lc, LinphoneCall *call, LinphoneCall *dest){
        return sal_call_refer_with_replaces (call->op,dest->op);
}

bool_t linphone_core_inc_invite_pending(LinphoneCore*lc){
        LinphoneCall *call = linphone_core_get_current_call(lc);
        if(call != NULL)
        {
                if(call->dir==LinphoneCallIncoming
                        && (call->state == LinphoneCallIncomingReceived || call->state ==  LinphoneCallIncomingEarlyMedia))
                        return TRUE;
        }
        return FALSE;
}

/**
 * Updates a running call according to supplied call parameters or parameters changed in the LinphoneCore.
 *
 * In this version this is limited to the following use cases:
 * - setting up/down the video stream according to the video parameter of the LinphoneCallParams (see linphone_call_params_enable_video() ).
 * - changing the size of the transmitted video after calling linphone_core_set_preferred_video_size()
 *
 * In case no changes are requested through the LinphoneCallParams argument, then this argument can be ommitted and set to NULL.
 *
 * @return 0 if successful, -1 otherwise.
**/
int linphone_core_update_call(LinphoneCore *lc, LinphoneCall *call, const LinphoneCallParams *params){
        int err=0;
        if (params!=NULL){
                call->params=*params;
                update_local_media_description(lc,call,&call->localdesc);
                call->camera_active=params->has_video;
                if (lc->vtable.display_status)
                        lc->vtable.display_status(lc,_("Modifying call parameters..."));
                sal_call_set_local_media_description (call->op,call->localdesc);
                err=sal_call_update(call->op,"Media parameters update");
        }else{
#ifdef VIDEO_ENABLED
                if (call->videostream!=NULL){
                        video_stream_set_sent_video_size(call->videostream,linphone_core_get_preferred_video_size(lc));
                        video_stream_update_video_params (call->videostream);
                }
#endif
        }

        return err;
}


/**
 * Accept an incoming call.
 *
 * @ingroup call_control
 * Basically the application is notified of incoming calls within the
 * call_state_changed callback of the #LinphoneCoreVTable structure, where it will receive
 * a LinphoneCallIncoming event with the associated LinphoneCall object.
 * The application can later accept the call using
 * this method.
 * @param lc the LinphoneCore object
 * @param call the LinphoneCall object representing the call to be answered.
 * 
**/
int linphone_core_accept_call(LinphoneCore *lc, LinphoneCall *call)
{
        LinphoneProxyConfig *cfg=NULL,*dest_proxy=NULL;
        const char *contact=NULL;
        SalOp *replaced;
        SalMediaDescription *new_md;
        
        if (call==NULL){
                //if just one call is present answer the only one ...
                if(linphone_core_get_calls_nb (lc) != 1)
                        return -1;
                else
                        call = (LinphoneCall*)linphone_core_get_calls(lc)->data;
        }

        if (call->state==LinphoneCallConnected){
                /*call already accepted*/
                return -1;
        }
        
        /* check if this call is supposed to replace an already running one*/
        replaced=sal_call_get_replaces(call->op);
        if (replaced){
                LinphoneCall *rc=(LinphoneCall*)sal_op_get_user_pointer (replaced);
                if (rc){
                        ms_message("Call %p replaces call %p. This last one is going to be terminated automatically.",
                                   call,rc);
                        linphone_core_terminate_call (lc,rc);
                }
        }

        if (lc->current_call!=NULL && lc->current_call!=call){
                ms_warning("Cannot accept this call, there is already one running.");
                return -1;
        }
        
        /*can accept a new call only if others are on hold */
        {
                MSList *elem;
                for(elem=lc->calls;elem!=NULL;elem=elem->next){
                        LinphoneCall *c=(LinphoneCall*)elem->data;
                        if (c!=call && (c->state!=LinphoneCallPaused && c->state!=LinphoneCallPausing)){
                                ms_warning("Cannot accept this call as another one is running, pause it before.");
                                return -1;
                        }
                }
        }

        /*stop ringing */
        if (lc->ringstream!=NULL) {
                ms_message("stop ringing");
                ring_stop(lc->ringstream);
                ms_message("ring stopped");
                lc->ringstream=NULL;
        }
        
        linphone_core_get_default_proxy(lc,&cfg);
        dest_proxy=cfg;
        dest_proxy=linphone_core_lookup_known_proxy(lc,call->log->to);

        if (cfg!=dest_proxy && dest_proxy!=NULL) {
                ms_message("Overriding default proxy setting for this call:");
                ms_message("The used identity will be %s",linphone_proxy_config_get_identity(dest_proxy));
        }
        /*try to be best-effort in giving real local or routable contact address*/
        contact=get_fixed_contact(lc,call,dest_proxy);
        if (contact)
                sal_op_set_contact(call->op,contact);

        if (call->audiostream==NULL)
                linphone_call_init_media_streams(call);
        
        sal_call_accept(call->op);
        if (lc->vtable.display_status!=NULL)
                lc->vtable.display_status(lc,_("Connected."));
        lc->current_call=call;
        linphone_call_set_state(call,LinphoneCallConnected,"Connected");
        new_md=sal_call_get_final_media_description(call->op);
        linphone_core_update_streams(lc, call, new_md);
        if (new_md){
                linphone_call_set_state(call,LinphoneCallStreamsRunning,"Connected (streams running)");
        }else call->media_pending=TRUE;
        
        ms_message("call answered.");
        return 0;
}

int linphone_core_abort_call(LinphoneCore *lc, LinphoneCall *call, const char *error){
        sal_call_terminate(call->op);

        /*stop ringing*/
        if (lc->ringstream!=NULL) {
                ring_stop(lc->ringstream);
                lc->ringstream=NULL;
        }
        linphone_call_stop_media_streams(call);
        if (lc->vtable.display_status!=NULL)
                lc->vtable.display_status(lc,_("Call aborted") );
        linphone_call_set_state(call,LinphoneCallError,error);
        return 0;
}

static void terminate_call(LinphoneCore *lc, LinphoneCall *call){
        if (call->state==LinphoneCallIncomingReceived){
                call->reason=LinphoneReasonDeclined;
        }
        /*stop ringing*/
        if (lc->ringstream!=NULL) {
                ring_stop(lc->ringstream);
                lc->ringstream=NULL;
        }
        linphone_call_stop_media_streams(call);
        if (lc->vtable.display_status!=NULL)
                lc->vtable.display_status(lc,_("Call ended") );
}

int linphone_core_redirect_call(LinphoneCore *lc, LinphoneCall *call, const char *redirect_uri){
        if (call->state==LinphoneCallIncomingReceived){
                sal_call_decline(call->op,SalReasonRedirect,redirect_uri);
                call->reason=LinphoneReasonDeclined;
                terminate_call(lc,call);
                linphone_call_set_state(call,LinphoneCallEnd,"Call terminated");
        }else{
                ms_error("Bad state for call redirection.");
                return -1;
    }
        return 0;
}


/**
 * Terminates a call.
 *
 * @ingroup call_control
 * @param lc the LinphoneCore
 * @param the_call the LinphoneCall object representing the call to be terminated.
**/
int linphone_core_terminate_call(LinphoneCore *lc, LinphoneCall *the_call)
{
        LinphoneCall *call;
        if (the_call == NULL){
                call = linphone_core_get_current_call(lc);
                if (ms_list_size(lc->calls)==1){
                        call=(LinphoneCall*)lc->calls->data;
                }else{
                        ms_warning("No unique call to terminate !");
                        return -1;
                }
        }
        else
        {
                call = the_call;
        }
        sal_call_terminate(call->op);
        terminate_call(lc,call);
        
        linphone_call_set_state(call,LinphoneCallEnd,"Call terminated");
        return 0;
}

/**
 * Terminates all the calls.
 *
 * @ingroup call_control
 * @param lc The LinphoneCore
**/
int linphone_core_terminate_all_calls(LinphoneCore *lc){
        while(lc->calls)
        {
                LinphoneCall *the_call = lc->calls->data;
                linphone_core_terminate_call(lc,the_call);
        }
        ms_list_free(lc->calls);
        return -1;
}

/**
 * Returns the current list of calls.
 *
 * Note that this list is read-only and might be changed by the core after a function call to linphone_core_iterate().
 * Similarly the LinphoneCall objects inside it might be destroyed without prior notice.
 * To hold references to LinphoneCall object into your program, you must use linphone_call_ref().
 *
 * @ingroup call_control
**/
const MSList *linphone_core_get_calls(LinphoneCore *lc)
{
        return lc->calls;
}

/**
 * Returns TRUE if there is a call running.
 *
 * @ingroup call_control
**/
bool_t linphone_core_in_call(const LinphoneCore *lc){
        return linphone_core_get_current_call((LinphoneCore *)lc)!=NULL;
}

/**
 * Returns The _LinphoneCall struct of the current call if one is in call
 *
 * @ingroup call_control
**/
LinphoneCall *linphone_core_get_current_call(const LinphoneCore *lc)
{
        return lc->current_call;
}

/**
 * Pauses the call. If a music file has been setup using linphone_core_set_play_file(),
 * this file will be played to the remote user.
 *
 * @ingroup call_control
**/
int linphone_core_pause_call(LinphoneCore *lc, LinphoneCall *the_call)
{
        LinphoneCall *call = the_call;
        const char *subject=NULL;

        if (call->state!=LinphoneCallStreamsRunning && call->state!=LinphoneCallPausedByRemote){
                ms_warning("Cannot pause this call, it is not active.");
                return -1;
        }
        if (sal_media_description_has_dir(call->resultdesc,SalStreamSendRecv)){
                sal_media_description_set_dir(call->localdesc,SalStreamSendOnly);
                subject="Call on hold";
        }else if (sal_media_description_has_dir(call->resultdesc,SalStreamRecvOnly)){
                sal_media_description_set_dir(call->localdesc,SalStreamSendOnly);
                subject="Call on hold for me too";
        }else{
                ms_error("No reason to pause this call, it is already paused or inactive.");
                return -1;
        }
        if (sal_call_update(call->op,subject) != 0)
        {
                if (lc->vtable.display_warning)
                        lc->vtable.display_warning(lc,_("Could not pause the call"));
        }
        linphone_call_set_state(call,LinphoneCallPausing,"Pausing call");
        if (lc->vtable.display_status)
                lc->vtable.display_status(lc,_("Pausing the current call..."));
        lc->current_call=NULL;
        if (call->audiostream || call->videostream)
                linphone_call_stop_media_streams (call);
        return 0;
}

/**
 * Pause all currently running calls.
**/
int linphone_core_pause_all_calls(LinphoneCore *lc){
        const MSList *elem;
        for(elem=lc->calls;elem!=NULL;elem=elem->next){
                LinphoneCall *call=(LinphoneCall *)elem->data;
                LinphoneCallState cs=linphone_call_get_state(call);
                if (cs==LinphoneCallStreamsRunning || cs==LinphoneCallPausedByRemote){
                        linphone_core_pause_call(lc,call);
                }
        }
        return 0;
}

/**
 * Resumes the call.
 *
 * @ingroup call_control
**/
int linphone_core_resume_call(LinphoneCore *lc, LinphoneCall *the_call)
{
        char temp[255]={0};
        LinphoneCall *call = the_call;
        
        if(call->state!=LinphoneCallPaused ){
                ms_warning("we cannot resume a call that has not been established and paused before");
                return -1;
        }
        if(linphone_core_get_current_call(lc) != NULL){
                ms_warning("There is already a call in process, pause or stop it first.");
                if (lc->vtable.display_warning)
                        lc->vtable.display_warning(lc,_("There is already a call in process, pause or stop it first."));
                return -1;
        }
        ms_message("Resuming call %p",call);
        sal_media_description_set_dir(call->localdesc,SalStreamSendRecv);
        if(sal_call_update(call->op,"Call resuming") != 0){
                return -1;
        }
        linphone_call_set_state (call,LinphoneCallResuming,"Resuming");
        snprintf(temp,sizeof(temp)-1,"Resuming the call with %s",linphone_call_get_remote_address_as_string(call));
        if (lc->vtable.display_status) 
                lc->vtable.display_status(lc,temp);
        return 0;
}

static int remote_address_compare(LinphoneCall *call, const LinphoneAddress *raddr){
        const LinphoneAddress *addr=linphone_call_get_remote_address (call);
        return !linphone_address_weak_equal (addr,raddr);
}

/**
 * Get the call with the remote_address specified
 * @param lc
 * @param remote_address
 * @return the LinphoneCall of the call if found
 */
LinphoneCall *linphone_core_get_call_by_remote_address(LinphoneCore *lc, const char *remote_address){
        LinphoneAddress *raddr=linphone_address_new(remote_address);
        MSList *elem=ms_list_find_custom(lc->calls,(int (*)(const void*,const void *))remote_address_compare,raddr);
        if (elem) return (LinphoneCall*) elem->data;
        return NULL;
}

int linphone_core_send_publish(LinphoneCore *lc,
                               LinphoneOnlineStatus presence_mode)
{
        const MSList *elem;
        for (elem=linphone_core_get_proxy_config_list(lc);elem!=NULL;elem=ms_list_next(elem)){
                LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)elem->data;
                if (cfg->publish) linphone_proxy_config_send_publish(cfg,presence_mode);
        }
        return 0;
}

/**
 * Set the incoming call timeout in seconds.
 *
 * @ingroup call_control
 * If an incoming call isn't answered for this timeout period, it is 
 * automatically declined.
**/
void linphone_core_set_inc_timeout(LinphoneCore *lc, int seconds){
        lc->sip_conf.inc_timeout=seconds;
}

/**
 * Returns the incoming call timeout
 *
 * @ingroup call_control
 * See linphone_core_set_inc_timeout() for details.
**/
int linphone_core_get_inc_timeout(LinphoneCore *lc){
        return lc->sip_conf.inc_timeout;
}

void linphone_core_set_presence_info(LinphoneCore *lc,int minutes_away,
                                                                                                        const char *contact,
                                                                                                        LinphoneOnlineStatus presence_mode)
{
        if (minutes_away>0) lc->minutes_away=minutes_away;
        
        if (lc->alt_contact!=NULL) {
                ms_free(lc->alt_contact);
                lc->alt_contact=NULL;
        }
        if (contact) lc->alt_contact=ms_strdup(contact);
        if (lc->presence_mode!=presence_mode){
                linphone_core_notify_all_friends(lc,presence_mode);
                /*
                   Improve the use of all LINPHONE_STATUS available.
                   !TODO Do not mix "presence status" with "answer status code"..
                   Use correct parameter to follow sip_if_match/sip_etag.
                 */
                linphone_core_send_publish(lc,presence_mode);
        }
        lc->presence_mode=presence_mode;
}

LinphoneOnlineStatus linphone_core_get_presence_info(const LinphoneCore *lc){
        return lc->presence_mode;
}

/**
 * Get playback sound level in 0-100 scale.
 *
 * @ingroup media_parameters
**/
int linphone_core_get_play_level(LinphoneCore *lc)
{
        return lc->sound_conf.play_lev;
}

/**
 * Get ring sound level in 0-100 scale
 *
 * @ingroup media_parameters
**/
int linphone_core_get_ring_level(LinphoneCore *lc)
{
        return lc->sound_conf.ring_lev;
}

/**
 * Get sound capture level in 0-100 scale
 *
 * @ingroup media_parameters
**/
int linphone_core_get_rec_level(LinphoneCore *lc){
        return lc->sound_conf.rec_lev;
}

/**
 * Set sound ring level in 0-100 scale
 *
 * @ingroup media_parameters
**/
void linphone_core_set_ring_level(LinphoneCore *lc, int level){
        MSSndCard *sndcard;
        lc->sound_conf.ring_lev=level;
        sndcard=lc->sound_conf.ring_sndcard;
        if (sndcard) ms_snd_card_set_level(sndcard,MS_SND_CARD_PLAYBACK,level);
}

/**
 * Allow to control play level before entering sound card:  gain in db
 *
 * @ingroup media_parameters
**/
void linphone_core_set_playback_gain_db (LinphoneCore *lc, float gaindb){
        float gain=gaindb;
        LinphoneCall *call=linphone_core_get_current_call (lc);
        AudioStream *st;

        lc->sound_conf.soft_play_lev=gaindb;

        if (call==NULL || (st=call->audiostream)==NULL){
                ms_message("linphone_core_set_playback_gain_db(): no active call.");
                return;
        }
        if (st->volrecv){
                ms_filter_call_method(st->volrecv,MS_VOLUME_SET_DB_GAIN,&gain);
        }else ms_warning("Could not apply gain: gain control wasn't activated.");
}

/**
 * Get playback gain in db before entering  sound card.
 *
 * @ingroup media_parameters
**/
float linphone_core_get_playback_gain_db(LinphoneCore *lc) {
        return lc->sound_conf.soft_play_lev;
}

/**
 * Set sound playback level in 0-100 scale
 *
 * @ingroup media_parameters
**/
void linphone_core_set_play_level(LinphoneCore *lc, int level){
        MSSndCard *sndcard;
        lc->sound_conf.play_lev=level;
        sndcard=lc->sound_conf.play_sndcard;
        if (sndcard) ms_snd_card_set_level(sndcard,MS_SND_CARD_PLAYBACK,level);
}

/**
 * Set sound capture level in 0-100 scale
 *
 * @ingroup media_parameters
**/
void linphone_core_set_rec_level(LinphoneCore *lc, int level)
{
        MSSndCard *sndcard;
        lc->sound_conf.rec_lev=level;
        sndcard=lc->sound_conf.capt_sndcard;
        if (sndcard) ms_snd_card_set_level(sndcard,MS_SND_CARD_CAPTURE,level);
}

static MSSndCard *get_card_from_string_id(const char *devid, unsigned int cap){
        MSSndCard *sndcard=NULL;
        if (devid!=NULL){
                sndcard=ms_snd_card_manager_get_card(ms_snd_card_manager_get(),devid);
                if (sndcard!=NULL &&
                        (ms_snd_card_get_capabilities(sndcard) & cap)==0 ){
                        ms_warning("%s card does not have the %s capability, ignoring.",
                                devid,
                                cap==MS_SND_CARD_CAP_CAPTURE ? "capture" : "playback");
                        sndcard=NULL;
                }
        }
        if (sndcard==NULL) {
                /* get a card that has read+write capabilities */
                sndcard=ms_snd_card_manager_get_default_card(ms_snd_card_manager_get());
                /* otherwise refine to the first card having the right capability*/
                if (sndcard==NULL){
                        const MSList *elem=ms_snd_card_manager_get_list(ms_snd_card_manager_get());
                        for(;elem!=NULL;elem=elem->next){
                                sndcard=(MSSndCard*)elem->data;
                                if (ms_snd_card_get_capabilities(sndcard) & cap) break;
                        }
                }
                if (sndcard==NULL){/*looks like a bug! take the first one !*/
                        const MSList *elem=ms_snd_card_manager_get_list(ms_snd_card_manager_get());
                        if (elem) sndcard=(MSSndCard*)elem->data;
        }
        }
        if (sndcard==NULL) ms_error("Could not find a suitable soundcard !");
        return sndcard;
}

/**
 * Returns true if the specified sound device can capture sound.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
 * @param devid the device name as returned by linphone_core_get_sound_devices()
**/
bool_t linphone_core_sound_device_can_capture(LinphoneCore *lc, const char *devid){
        MSSndCard *sndcard;
        sndcard=ms_snd_card_manager_get_card(ms_snd_card_manager_get(),devid);
        if (sndcard!=NULL && (ms_snd_card_get_capabilities(sndcard) & MS_SND_CARD_CAP_CAPTURE)) return TRUE;
        return FALSE;
}

/**
 * Returns true if the specified sound device can play sound.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
 * @param devid the device name as returned by linphone_core_get_sound_devices()
**/
bool_t linphone_core_sound_device_can_playback(LinphoneCore *lc, const char *devid){
        MSSndCard *sndcard;
        sndcard=ms_snd_card_manager_get_card(ms_snd_card_manager_get(),devid);
        if (sndcard!=NULL && (ms_snd_card_get_capabilities(sndcard) & MS_SND_CARD_CAP_PLAYBACK)) return TRUE;
        return FALSE;
}

/**
 * Sets the sound device used for ringing.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
 * @param devid the device name as returned by linphone_core_get_sound_devices()
**/
int linphone_core_set_ringer_device(LinphoneCore *lc, const char * devid){
        MSSndCard *card=get_card_from_string_id(devid,MS_SND_CARD_CAP_PLAYBACK);
        lc->sound_conf.ring_sndcard=card;
        if (card && linphone_core_ready(lc))
                lp_config_set_string(lc->config,"sound","ringer_dev_id",ms_snd_card_get_string_id(card));
        return 0;
}

/**
 * Sets the sound device used for playback.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
 * @param devid the device name as returned by linphone_core_get_sound_devices()
**/
int linphone_core_set_playback_device(LinphoneCore *lc, const char * devid){
        MSSndCard *card=get_card_from_string_id(devid,MS_SND_CARD_CAP_PLAYBACK);
        lc->sound_conf.play_sndcard=card;
        if (card &&  linphone_core_ready(lc))
                lp_config_set_string(lc->config,"sound","playback_dev_id",ms_snd_card_get_string_id(card));
        return 0;
}

/**
 * Sets the sound device used for capture.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
 * @param devid the device name as returned by linphone_core_get_sound_devices()
**/
int linphone_core_set_capture_device(LinphoneCore *lc, const char * devid){
        MSSndCard *card=get_card_from_string_id(devid,MS_SND_CARD_CAP_CAPTURE);
        lc->sound_conf.capt_sndcard=card;
        if (card &&  linphone_core_ready(lc))
                lp_config_set_string(lc->config,"sound","capture_dev_id",ms_snd_card_get_string_id(card));
        return 0;
}

/**
 * Returns the name of the currently assigned sound device for ringing.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
**/
const char * linphone_core_get_ringer_device(LinphoneCore *lc)
{
        if (lc->sound_conf.ring_sndcard) return ms_snd_card_get_string_id(lc->sound_conf.ring_sndcard);
        return NULL;
}

/**
 * Returns the name of the currently assigned sound device for playback.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
**/
const char * linphone_core_get_playback_device(LinphoneCore *lc)
{
        return lc->sound_conf.play_sndcard ? ms_snd_card_get_string_id(lc->sound_conf.play_sndcard) : NULL;
}

/**
 * Returns the name of the currently assigned sound device for capture.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
**/
const char * linphone_core_get_capture_device(LinphoneCore *lc)
{
        return lc->sound_conf.capt_sndcard ? ms_snd_card_get_string_id(lc->sound_conf.capt_sndcard) : NULL;
}

/**
 * Returns an unmodifiable array of available sound devices.
 *
 * The array is NULL terminated.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
**/
const char**  linphone_core_get_sound_devices(LinphoneCore *lc){
        build_sound_devices_table(lc);
        return lc->sound_conf.cards;
}

/**
 * Returns an unmodifiable array of available video capture devices.
 *
 * @ingroup media_parameters
 * The array is NULL terminated.
**/
const char**  linphone_core_get_video_devices(const LinphoneCore *lc){
        return lc->video_conf.cams;
}

char linphone_core_get_sound_source(LinphoneCore *lc)
{
        return lc->sound_conf.source;
}

void linphone_core_set_sound_source(LinphoneCore *lc, char source)
{
        MSSndCard *sndcard=lc->sound_conf.capt_sndcard;
        lc->sound_conf.source=source;
        if (!sndcard) return;
        switch(source){
                case 'm':
                        ms_snd_card_set_capture(sndcard,MS_SND_CARD_MIC);
                        break;
                case 'l':
                        ms_snd_card_set_capture(sndcard,MS_SND_CARD_LINE);
                        break;
        }

}


/**
 * Sets the path to a wav file used for ringing.
 *
 * @param path The file must be a wav 16bit linear. Local ring is disabled if null
 * @param lc The LinphoneCore object
 *
 * @ingroup media_parameters
**/
void linphone_core_set_ring(LinphoneCore *lc,const char *path){
        if (lc->sound_conf.local_ring!=0){
                ms_free(lc->sound_conf.local_ring);
                lc->sound_conf.local_ring=NULL;
        }
        if (path)
                lc->sound_conf.local_ring=ms_strdup(path);
        if ( linphone_core_ready(lc) && lc->sound_conf.local_ring)
                lp_config_set_string(lc->config,"sound","local_ring",lc->sound_conf.local_ring);
}

/**
 * Returns the path to the wav file used for ringing.
 *
 * @param lc The LinphoneCore object
 * @ingroup media_parameters
**/
const char *linphone_core_get_ring(const LinphoneCore *lc){
        return lc->sound_conf.local_ring;
}

static void notify_end_of_ring(void *ud, MSFilter *f, unsigned int event, void *arg){
        LinphoneCore *lc=(LinphoneCore*)ud;
        lc->preview_finished=1;
}

int linphone_core_preview_ring(LinphoneCore *lc, const char *ring,LinphoneCoreCbFunc func,void * userdata)
{
        if (lc->ringstream!=0){
                ms_warning("Cannot start ring now,there's already a ring being played");
                return -1;
        }
        lc_callback_obj_init(&lc->preview_finished_cb,func,userdata);
        lc->preview_finished=0;
        if (lc->sound_conf.ring_sndcard!=NULL){
                MSSndCard *ringcard=lc->sound_conf.lsd_card ? lc->sound_conf.lsd_card : lc->sound_conf.ring_sndcard;
                lc->ringstream=ring_start_with_cb(ring,2000,ringcard,notify_end_of_ring,(void *)lc);
        }
        return 0;
}

/**
 * Sets the path to a wav file used for ringing back.
 *
 * Ringback means the ring that is heard when it's ringing at the remote party.
 * The file must be a wav 16bit linear.
 *
 * @ingroup media_parameters
**/
void linphone_core_set_ringback(LinphoneCore *lc, const char *path){
        if (lc->sound_conf.remote_ring!=0){
                ms_free(lc->sound_conf.remote_ring);
        }
        lc->sound_conf.remote_ring=ms_strdup(path);
}

/**
 * Returns the path to the wav file used for ringing back.
 *
 * @ingroup media_parameters
**/
const char * linphone_core_get_ringback(const LinphoneCore *lc){
        return lc->sound_conf.remote_ring;
}

/**
 * Enables or disable echo cancellation. Value is saved an used for subsequent calls
 *
 * @ingroup media_parameters
**/
void linphone_core_enable_echo_cancellation(LinphoneCore *lc, bool_t val){
        lc->sound_conf.ec=val;
        if ( linphone_core_ready(lc))
                lp_config_set_int(lc->config,"sound","echocancellation",val);
}


/**
 * Returns TRUE if echo cancellation is enabled.
 *
 * @ingroup media_parameters
**/
bool_t linphone_core_echo_cancellation_enabled(LinphoneCore *lc){
        return lc->sound_conf.ec;
}

void linphone_core_enable_echo_limiter(LinphoneCore *lc, bool_t val){
        lc->sound_conf.ea=val;
}

bool_t linphone_core_echo_limiter_enabled(const LinphoneCore *lc){
        return lc->sound_conf.ea;
}

/**
 * Mutes or unmutes the local microphone.
 *
 * @ingroup media_parameters
**/
void linphone_core_mute_mic(LinphoneCore *lc, bool_t val){
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (call==NULL){
                ms_warning("linphone_core_mute_mic(): No current call !");
                return;
        }
        if (call->audiostream!=NULL){
                audio_stream_set_mic_gain(call->audiostream,
                        (val==TRUE) ? 0 : lp_config_get_float(lc->config,"sound","mic_gain",1)); 
                if ( linphone_core_get_rtp_no_xmit_on_audio_mute(lc) ){
                        audio_stream_mute_rtp(call->audiostream,val);
                }
                call->audio_muted=val;
        }
}

bool_t linphone_core_is_mic_muted(LinphoneCore *lc) {
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (call==NULL){
                ms_warning("linphone_core_is_mic_muted(): No current call !");
                return FALSE;
        }
        return call->audio_muted;
}

// returns rtp transmission status for an active stream
// if audio is muted and config parameter rtp_no_xmit_on_audio_mute 
// was set on then rtp transmission is also muted
bool_t linphone_core_is_rtp_muted(LinphoneCore *lc){
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (call==NULL){
                ms_warning("linphone_core_is_mic_muted(): No current call !");
                return FALSE;
        }
        if( linphone_core_get_rtp_no_xmit_on_audio_mute(lc)){
                return call->audio_muted;
        }
        return FALSE;
}

void linphone_core_enable_agc(LinphoneCore *lc, bool_t val){
        lc->sound_conf.agc=val;
}

bool_t linphone_core_agc_enabled(const LinphoneCore *lc){
        return lc->sound_conf.agc;
}

/**
 * Send the specified dtmf.
 *
 * @ingroup media_parameters
 * This function only works during calls. The dtmf is automatically played to the user.
 * @param lc The LinphoneCore object
 * @param dtmf The dtmf name specified as a char, such as '0', '#' etc...
 *
**/
void linphone_core_send_dtmf(LinphoneCore *lc, char dtmf)
{
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (call==NULL){
                ms_warning("linphone_core_send_dtmf(): no active call");
                return;
        }
        /*By default we send DTMF RFC2833 if we do not have enabled SIP_INFO but we can also send RFC2833 and SIP_INFO*/
        if (linphone_core_get_use_rfc2833_for_dtmf(lc)!=0 || linphone_core_get_use_info_for_dtmf(lc)==0)
        {
                /* In Band DTMF */
                if (call->audiostream!=NULL){
                        audio_stream_send_dtmf(call->audiostream,dtmf);
                }
                else
                {
                        ms_error("we cannot send RFC2833 dtmf when we are not in communication");
                }
        }
        if (linphone_core_get_use_info_for_dtmf(lc)!=0){
                /* Out of Band DTMF (use INFO method) */
                sal_call_send_dtmf(call->op,dtmf);
        }
}

void linphone_core_set_stun_server(LinphoneCore *lc, const char *server){
        if (lc->net_conf.stun_server!=NULL)
                ms_free(lc->net_conf.stun_server);
        if (server)
                lc->net_conf.stun_server=ms_strdup(server);
        else lc->net_conf.stun_server=NULL;
}

const char * linphone_core_get_stun_server(const LinphoneCore *lc){
        return lc->net_conf.stun_server;
}

const char * linphone_core_get_relay_addr(const LinphoneCore *lc){
        return lc->net_conf.relay;
}

int linphone_core_set_relay_addr(LinphoneCore *lc, const char *addr){
        if (lc->net_conf.relay!=NULL){
                ms_free(lc->net_conf.relay);
                lc->net_conf.relay=NULL;
        }
        if (addr){
                lc->net_conf.relay=ms_strdup(addr);
        }
        return 0;
}

void linphone_core_set_nat_address(LinphoneCore *lc, const char *addr)
{
        if (lc->net_conf.nat_address!=NULL){
                ms_free(lc->net_conf.nat_address);
        }
        if (addr!=NULL) lc->net_conf.nat_address=ms_strdup(addr);
        else lc->net_conf.nat_address=NULL;
        if (lc->sip_conf.contact) update_primary_contact(lc);
}

const char *linphone_core_get_nat_address(const LinphoneCore *lc) {
        return lc->net_conf.nat_address;
}

const char *linphone_core_get_nat_address_resolved(LinphoneCore *lc)
{
        struct sockaddr_storage ss;
        socklen_t ss_len;
        int error;
        char ipstring [INET6_ADDRSTRLEN];

        if (parse_hostname_to_addr (lc->net_conf.nat_address, &ss, &ss_len)<0) {
                return lc->net_conf.nat_address;
        }

        error = getnameinfo((struct sockaddr *)&ss, ss_len,
                ipstring, sizeof(ipstring), NULL, 0, NI_NUMERICHOST);
        if (error) {
                return lc->net_conf.nat_address;
        } 
        
        if (lc->net_conf.nat_address_ip!=NULL){
                ms_free(lc->net_conf.nat_address_ip);
        }
        lc->net_conf.nat_address_ip = ms_strdup (ipstring);
        return lc->net_conf.nat_address_ip;
}

void linphone_core_set_firewall_policy(LinphoneCore *lc, LinphoneFirewallPolicy pol){
        lc->net_conf.firewall_policy=pol;
        if (lc->sip_conf.contact) update_primary_contact(lc);
}

LinphoneFirewallPolicy linphone_core_get_firewall_policy(const LinphoneCore *lc){
        return lc->net_conf.firewall_policy;
}

/**
 * Get the list of call logs (past calls).
 *
 * @ingroup call_logs
**/
const MSList * linphone_core_get_call_logs(LinphoneCore *lc){
        lc->missed_calls=0;
        return lc->call_logs;
}

/**
 * Erase the call log.
 *
 * @ingroup call_logs
**/
void linphone_core_clear_call_logs(LinphoneCore *lc){
        lc->missed_calls=0;
        ms_list_for_each(lc->call_logs,(void (*)(void*))linphone_call_log_destroy);
        lc->call_logs=ms_list_free(lc->call_logs);
        call_logs_write_to_config_file(lc);
}

static void toggle_video_preview(LinphoneCore *lc, bool_t val){
#ifdef VIDEO_ENABLED
        if (val){
                if (lc->previewstream==NULL){
                        lc->previewstream=video_preview_new();
                        video_preview_set_size(lc->previewstream,lc->video_conf.vsize);
                        if (lc->video_conf.displaytype)
                                video_preview_set_display_filter_name(lc->previewstream,lc->video_conf.displaytype);
                        if (lc->preview_window_id!=0)
                                video_preview_set_native_window_id(lc->previewstream,lc->preview_window_id);
                        video_preview_start(lc->previewstream,lc->video_conf.device);
                }
        }else{
                if (lc->previewstream!=NULL){
                        video_preview_stop(lc->previewstream);
                        lc->previewstream=NULL;
                }
        }
#endif
}

/**
 * Enables video globally.
 *
 * @ingroup media_parameters
 * This function does not have any effect during calls. It just indicates LinphoneCore to
 * initiate future calls with video or not. The two boolean parameters indicate in which
 * direction video is enabled. Setting both to false disables video entirely.
 *
 * @param lc The LinphoneCore object
 * @param vcap_enabled indicates whether video capture is enabled
 * @param display_enabled indicates whether video display should be shown
 *
**/
void linphone_core_enable_video(LinphoneCore *lc, bool_t vcap_enabled, bool_t display_enabled){
#ifndef VIDEO_ENABLED
        if (vcap_enabled || display_enabled)
                ms_warning("This version of linphone was built without video support.");
#endif
        lc->video_conf.capture=vcap_enabled;
        lc->video_conf.display=display_enabled;

        /* need to re-apply network bandwidth settings*/
        linphone_core_set_download_bandwidth(lc,
                linphone_core_get_download_bandwidth(lc));
        linphone_core_set_upload_bandwidth(lc,
                linphone_core_get_upload_bandwidth(lc));
}

/**
 * Returns TRUE if video is enabled, FALSE otherwise.
 * @ingroup media_parameters
**/
bool_t linphone_core_video_enabled(LinphoneCore *lc){
        return (lc->video_conf.display || lc->video_conf.capture);
}

/**
 * Controls video preview enablement.
 *
 * @ingroup media_parameters
 * Video preview refers to the action of displaying the local webcam image
 * to the user while not in call.
**/
void linphone_core_enable_video_preview(LinphoneCore *lc, bool_t val){
        lc->video_conf.show_local=val;
}

/**
 * Returns TRUE if video previewing is enabled.
 * @ingroup media_parameters
**/
bool_t linphone_core_video_preview_enabled(const LinphoneCore *lc){
        return lc->video_conf.show_local;
}

/**
 * Enables or disable self view during calls.
 *
 * @ingroup media_parameters
 * Self-view refers to having local webcam image inserted in corner
 * of the video window during calls.
 * This function works at any time, including during calls.
**/
void linphone_core_enable_self_view(LinphoneCore *lc, bool_t val){
#ifdef VIDEO_ENABLED
        LinphoneCall *call=linphone_core_get_current_call (lc);
        lc->video_conf.selfview=val;
        if (call && call->videostream){
                video_stream_enable_self_view(call->videostream,val);
        }
#endif
}

/**
 * Returns TRUE if self-view is enabled, FALSE otherwise.
 *
 * @ingroup media_parameters
 *
 * Refer to linphone_core_enable_self_view() for details.
**/
bool_t linphone_core_self_view_enabled(const LinphoneCore *lc){
        return lc->video_conf.selfview;
}

/**
 * Sets the active video device.
 *
 * @ingroup media_parameters
 * @param lc The LinphoneCore object
 * @param id the name of the video device as returned by linphone_core_get_video_devices()
**/
int linphone_core_set_video_device(LinphoneCore *lc, const char *id){
        MSWebCam *olddev=lc->video_conf.device;
        const char *vd;
        if (id!=NULL){
                lc->video_conf.device=ms_web_cam_manager_get_cam(ms_web_cam_manager_get(),id);
                if (lc->video_conf.device==NULL){
                        ms_warning("Could not found video device %s",id);
                }
        }
        if (lc->video_conf.device==NULL)
                lc->video_conf.device=ms_web_cam_manager_get_default_cam(ms_web_cam_manager_get());
        if (olddev!=NULL && olddev!=lc->video_conf.device){
                toggle_video_preview(lc,FALSE);/*restart the video local preview*/
        }
        if ( linphone_core_ready(lc) && lc->video_conf.device){
                vd=ms_web_cam_get_string_id(lc->video_conf.device);
                if (vd && strstr(vd,"Static picture")!=NULL){
                        vd=NULL;
                }
                lp_config_set_string(lc->config,"video","device",vd);
        }
        return 0;
}

/**
 * Returns the name of the currently active video device.
 *
 * @param lc The LinphoneCore object
 * @ingroup media_parameters
**/
const char *linphone_core_get_video_device(const LinphoneCore *lc){
        if (lc->video_conf.device) return ms_web_cam_get_string_id(lc->video_conf.device);
        return NULL;
}

#ifdef VIDEO_ENABLED
static VideoStream * get_active_video_stream(LinphoneCore *lc){
        VideoStream *vs = NULL;
        LinphoneCall *call=linphone_core_get_current_call (lc);
        /* Select the video stream from the call in the first place */
        if (call && call->videostream) {
                vs = call->videostream;
        }
        /* If not in call, select the video stream from the preview */
        if (vs == NULL && lc->previewstream) {
                vs = lc->previewstream;
        }
        return vs;
}
#endif

int linphone_core_set_static_picture(LinphoneCore *lc, const char *path) {
#ifdef VIDEO_ENABLED
        VideoStream *vs=get_active_video_stream(lc);
        /* If we have a video stream (either preview, either from call), we
                 have a source and it is using the static picture filter, then
                 force the filter to use that picture. */
        if (vs && vs->source) {
                if (ms_filter_get_id(vs->source) == MS_STATIC_IMAGE_ID) {
                        ms_filter_call_method(vs->source, MS_STATIC_IMAGE_SET_IMAGE,
                                                                                                                (void *)path);
                }
        }
        /* Tell the static image filter to use that image from now on so
                 that the image will be used next time it has to be read */
        ms_static_image_set_default_image(path);
#else
        ms_warning("Video support not compiled.");
#endif
        return 0;
}

int linphone_core_set_static_picture_fps(LinphoneCore *lc, float fps) {
#ifdef VIDEO_ENABLED
        VideoStream *vs = NULL;

        vs=get_active_video_stream(lc);
        
        /* If we have a video stream (either preview, either from call), we
                 have a source and it is using the static picture filter, then
                 force the filter to use that picture. */
        if (vs && vs->source) {
                if (ms_filter_get_id(vs->source) == MS_STATIC_IMAGE_ID) {
                        ms_filter_call_method(vs->source, MS_FILTER_SET_FPS,(void *)&fps);
                }
        }
#else
        ms_warning("Video support not compiled.");
#endif
        return 0;
}

float linphone_core_get_static_picture_fps(LinphoneCore *lc) {
#ifdef VIDEO_ENABLED
        VideoStream *vs = NULL;
        vs=get_active_video_stream(lc);
        /* If we have a video stream (either preview, either from call), we
                 have a source and it is using the static picture filter, then
                 force the filter to use that picture. */
        if (vs && vs->source) {
                if (ms_filter_get_id(vs->source) == MS_STATIC_IMAGE_ID) {
                  
                        float fps;
                  
                        ms_filter_call_method(vs->source, MS_FILTER_GET_FPS,(void *)&fps);
                        return fps;
                }
        }
#else
        ms_warning("Video support not compiled.");
#endif
        return 0;
}

/**
 * Returns the native window handle of the video window, casted as an unsigned long.
 *
 * @ingroup media_parameters
**/
unsigned long linphone_core_get_native_video_window_id(const LinphoneCore *lc){
#ifdef VIDEO_ENABLED
        LinphoneCall *call=linphone_core_get_current_call (lc);
        if (call && call->videostream)
                return video_stream_get_native_window_id(call->videostream);
        if (lc->previewstream)
                return video_stream_get_native_window_id(lc->previewstream);
#endif
        return lc->video_window_id;
}

/**
 * Set the native video window id where the video is to be displayed.
 * If not set the core will create its own window.
**/
void linphone_core_set_native_video_window_id(LinphoneCore *lc, unsigned long id){
#ifdef VIDEO_ENABLED
        LinphoneCall *call=linphone_core_get_current_call(lc);
        lc->video_window_id=id;
        if (call!=NULL && call->videostream){
                video_stream_set_native_window_id(call->videostream,id);
        }
#endif
}

/**
 * Returns the native window handle of the video preview window, casted as an unsigned long.
 *
 * @ingroup media_parameters
**/
unsigned long linphone_core_get_native_preview_window_id(const LinphoneCore *lc){
#ifdef VIDEO_ENABLED
        LinphoneCall *call=linphone_core_get_current_call (lc);
        if (call && call->videostream)
                return video_stream_get_native_preview_window_id(call->videostream);
        if (lc->previewstream)
                return video_preview_get_native_window_id(lc->previewstream);
#endif
        return lc->preview_window_id;
}

/**
 * Set the native window id where the preview video (local camera) is to be displayed.
 * This has to be used in conjonction with linphone_core_use_preview_window().
 * If not set the core will create its own window.
**/
void linphone_core_set_native_preview_window_id(LinphoneCore *lc, unsigned long id){
        lc->preview_window_id=id;
}

/**
 * Tells the core to use a separate window for local camera preview video, instead of
 * inserting local view within the remote video window.
 *
**/
void linphone_core_use_preview_window(LinphoneCore *lc, bool_t yesno){
        lc->use_preview_window=yesno;
}

static MSVideoSizeDef supported_resolutions[]={
#ifdef ENABLE_HD
        {       {MS_VIDEO_SIZE_1080P_W,MS_VIDEO_SIZE_1080P_H}   ,       "1080p" },
        {       {MS_VIDEO_SIZE_720P_W,MS_VIDEO_SIZE_720P_H}     ,       "1080p" },
#endif
        {       {MS_VIDEO_SIZE_SVGA_W,MS_VIDEO_SIZE_SVGA_H}     ,       "svga"  },
        {       {MS_VIDEO_SIZE_4CIF_W,MS_VIDEO_SIZE_4CIF_H}     ,       "4cif"  },
        {       {MS_VIDEO_SIZE_VGA_W,MS_VIDEO_SIZE_VGA_H}       ,       "vga"   },
        {       {MS_VIDEO_SIZE_CIF_W,MS_VIDEO_SIZE_CIF_H}       ,       "cif"   },
        {       {MS_VIDEO_SIZE_QVGA_W,MS_VIDEO_SIZE_QVGA_H}     ,       "qvga"  },
        {       {MS_VIDEO_SIZE_QVGA_H,MS_VIDEO_SIZE_QVGA_W}     ,       "qvga-portrait" },
        {       {MS_VIDEO_SIZE_QCIF_W,MS_VIDEO_SIZE_QCIF_H}     ,       "qcif"  },
        {       {MS_VIDEO_SIZE_QCIF_H,MS_VIDEO_SIZE_QCIF_W}     ,       "qcif-portrait" },
        {       {0,0}                   ,       NULL    }
};

/**
 * Returns the zero terminated table of supported video resolutions.
 *
 * @ingroup media_parameters
**/
const MSVideoSizeDef *linphone_core_get_supported_video_sizes(LinphoneCore *lc){
        return supported_resolutions;
}

static MSVideoSize video_size_get_by_name(const char *name){
        MSVideoSizeDef *pdef=supported_resolutions;
        MSVideoSize null_vsize={0,0};
        for(;pdef->name!=NULL;pdef++){
                if (strcasecmp(name,pdef->name)==0){
                        return pdef->vsize;
                }
        }
        ms_warning("Video resolution %s is not supported in linphone.",name);
        return null_vsize;
}

static const char *video_size_get_name(MSVideoSize vsize){
        MSVideoSizeDef *pdef=supported_resolutions;
        for(;pdef->name!=NULL;pdef++){
                if (pdef->vsize.width==vsize.width && pdef->vsize.height==vsize.height){
                        return pdef->name;
                }
        }
        return NULL;
}

static bool_t video_size_supported(MSVideoSize vsize){
        if (video_size_get_name(vsize)) return TRUE;
        ms_warning("Video resolution %ix%i is not supported in linphone.",vsize.width,vsize.height);
        return FALSE;
}

/**
 * Sets the preferred video size.
 *
 * @ingroup media_parameters
 * This applies only to the stream that is captured and sent to the remote party,
 * since we accept all standard video size on the receive path.
**/
void linphone_core_set_preferred_video_size(LinphoneCore *lc, MSVideoSize vsize){
        if (video_size_supported(vsize)){
                MSVideoSize oldvsize=lc->video_conf.vsize;
                lc->video_conf.vsize=vsize;
                if (!ms_video_size_equal(oldvsize,vsize) && lc->previewstream!=NULL){
                        toggle_video_preview(lc,FALSE);
                        toggle_video_preview(lc,TRUE);
                }
                if ( linphone_core_ready(lc))
                        lp_config_set_string(lc->config,"video","size",video_size_get_name(vsize));
        }
}

/**
 * Sets the preferred video size by its name.
 *
 * @ingroup media_parameters
 * This is identical to linphone_core_set_preferred_video_size() except
 * that it takes the name of the video resolution as input.
 * Video resolution names are: qcif, svga, cif, vga, 4cif, svga ...
**/
void linphone_core_set_preferred_video_size_by_name(LinphoneCore *lc, const char *name){
        MSVideoSize vsize=video_size_get_by_name(name);
        MSVideoSize default_vsize={MS_VIDEO_SIZE_CIF_W,MS_VIDEO_SIZE_CIF_H};
        if (vsize.width!=0)     linphone_core_set_preferred_video_size(lc,vsize);
        else linphone_core_set_preferred_video_size(lc,default_vsize);
}

/**
 * Returns the current preferred video size for sending.
 *
 * @ingroup media_parameters
**/
MSVideoSize linphone_core_get_preferred_video_size(LinphoneCore *lc){
        return lc->video_conf.vsize;
}

/**
 * Ask the core to stream audio from and to files, instead of using the soundcard.
**/
void linphone_core_use_files(LinphoneCore *lc, bool_t yesno){
        lc->use_files=yesno;
}

/**
 * Sets a wav file to be played when putting somebody on hold,
 * or when files are used instead of soundcards (see linphone_core_use_files()).
 * 
 * The file must be a 16 bit linear wav file.
**/
void linphone_core_set_play_file(LinphoneCore *lc, const char *file){
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (lc->play_file!=NULL){
                ms_free(lc->play_file);
                lc->play_file=NULL;
        }
        if (file!=NULL) {
                lc->play_file=ms_strdup(file);
                if (call && call->audiostream && call->audiostream->ticker)
                        audio_stream_play(call->audiostream,file);
        }
}


/**
 * Sets a wav file where incoming stream is to be recorded,
 * when files are used instead of soundcards (see linphone_core_use_files()).
 * 
 * The file must be a 16 bit linear wav file.
**/
void linphone_core_set_record_file(LinphoneCore *lc, const char *file){
        LinphoneCall *call=linphone_core_get_current_call(lc);
        if (lc->rec_file!=NULL){
                ms_free(lc->rec_file);
                lc->rec_file=NULL;
        }
        if (file!=NULL) {
                lc->rec_file=ms_strdup(file);
                if (call && call->audiostream)
                        audio_stream_record(call->audiostream,file);
        }
}


static MSFilter *get_dtmf_gen(LinphoneCore *lc){
        LinphoneCall *call=linphone_core_get_current_call (lc);
        if (call){
                AudioStream *stream=call->audiostream;
                if (stream){
                        return stream->dtmfgen;
                }
        }
        if (lc->ringstream==NULL){
                float amp=0.1;
                MSSndCard *ringcard=lc->sound_conf.lsd_card ?lc->sound_conf.lsd_card : lc->sound_conf.ring_sndcard;
                lc->ringstream=ring_start(NULL,0,ringcard);
                ms_filter_call_method(lc->ringstream->gendtmf,MS_DTMF_GEN_SET_DEFAULT_AMPLITUDE,&amp);
                lc->dmfs_playing_start_time=time(NULL);
        }else{
                if (lc->dmfs_playing_start_time!=0)
                        lc->dmfs_playing_start_time=time(NULL);
        }
        return lc->ringstream->gendtmf;
}

/**
 * @ingroup media_parameters
 * Plays a dtmf sound to the local user.
 * @param lc #LinphoneCore
 * @param dtmf DTMF to play ['0'..'16'] | '#' | '#'
 * @param duration_ms duration in ms, -1 means play until next further call to #linphone_core_stop_dtmf()
**/
void linphone_core_play_dtmf(LinphoneCore *lc, char dtmf, int duration_ms){
        MSFilter *f=get_dtmf_gen(lc);
        if (f==NULL){
                ms_error("No dtmf generator at this time !");
                return;
        }

        if (duration_ms>0)
                ms_filter_call_method(f, MS_DTMF_GEN_PLAY, &dtmf);
        else ms_filter_call_method(f, MS_DTMF_GEN_START, &dtmf);
}

/**
 * @ingroup media_parameters
 *
 * Stops playing a dtmf started by linphone_core_play_dtmf().
**/
void linphone_core_stop_dtmf(LinphoneCore *lc){
        MSFilter *f=get_dtmf_gen(lc);
        if (f!=NULL)
                ms_filter_call_method_noarg (f, MS_DTMF_GEN_STOP);
}



/**
 * Retrieves the user pointer that was given to linphone_core_new()
 *
 * @ingroup initializing
**/
void *linphone_core_get_user_data(LinphoneCore *lc){
        return lc->data;
}

int linphone_core_get_mtu(const LinphoneCore *lc){
        return lc->net_conf.mtu;
}

void linphone_core_set_mtu(LinphoneCore *lc, int mtu){
        lc->net_conf.mtu=mtu;
        if (mtu>0){
                if (mtu<500){
                        ms_error("MTU too small !");
                        mtu=500;
                }
                ms_set_mtu(mtu);
                ms_message("MTU is supposed to be %i, rtp payload max size will be %i",mtu, ms_get_payload_max_size());
        }else ms_set_mtu(0);//use mediastreamer2 default value
}

void linphone_core_set_waiting_callback(LinphoneCore *lc, LinphoneWaitingCallback cb, void *user_context){
        lc->wait_cb=cb;
        lc->wait_ctx=user_context;
}

void linphone_core_start_waiting(LinphoneCore *lc, const char *purpose){
        if (lc->wait_cb){
                lc->wait_ctx=lc->wait_cb(lc,lc->wait_ctx,LinphoneWaitingStart,purpose,0);
        }
}

void linphone_core_update_progress(LinphoneCore *lc, const char *purpose, float progress){
        if (lc->wait_cb){
                lc->wait_ctx=lc->wait_cb(lc,lc->wait_ctx,LinphoneWaitingProgress,purpose,progress);
        }else{
#ifdef WIN32
                Sleep(50000);
#else
                usleep(50000);
#endif
        }
}

void linphone_core_stop_waiting(LinphoneCore *lc){
        if (lc->wait_cb){
                lc->wait_ctx=lc->wait_cb(lc,lc->wait_ctx,LinphoneWaitingFinished,NULL,0);
        }
}

void linphone_core_set_audio_transports(LinphoneCore *lc, RtpTransport *rtp, RtpTransport *rtcp){
        lc->a_rtp=rtp;
        lc->a_rtcp=rtcp;
}

void linphone_core_set_video_transports(LinphoneCore *lc, RtpTransport *rtp, RtpTransport *rtcp){
        lc->v_rtp=rtp;
        lc->v_rtcp=rtcp;
}

/**
 * Retrieve RTP statistics regarding current call.
 * @param local RTP statistics computed locally.
 * @param remote RTP statistics computed by far end (obtained via RTCP feedback).
 *
 * @note Remote RTP statistics is not implemented yet.
 *
 * @returns 0 or -1 if no call is running.
**/
 
int linphone_core_get_current_call_stats(LinphoneCore *lc, rtp_stats_t *local, rtp_stats_t *remote){
        LinphoneCall *call=linphone_core_get_current_call (lc);
        if (call!=NULL){
                if (call->audiostream!=NULL){
                        memset(remote,0,sizeof(*remote));
                        audio_stream_get_local_rtp_stats (call->audiostream,local);
                        return 0;
                }
        }
        return -1;
}

void net_config_uninit(LinphoneCore *lc)
{
        net_config_t *config=&lc->net_conf;
        lp_config_set_int(lc->config,"net","download_bw",config->download_bw);
        lp_config_set_int(lc->config,"net","upload_bw",config->upload_bw);

        if (config->stun_server!=NULL){
                lp_config_set_string(lc->config,"net","stun_server",config->stun_server);
                ms_free(lc->net_conf.stun_server);
        }
        if (config->nat_address!=NULL){
                lp_config_set_string(lc->config,"net","nat_address",config->nat_address);
                ms_free(lc->net_conf.nat_address);
        }
        if (lc->net_conf.nat_address_ip !=NULL){
                ms_free(lc->net_conf.nat_address_ip);
        }
        lp_config_set_int(lc->config,"net","firewall_policy",config->firewall_policy);
        lp_config_set_int(lc->config,"net","mtu",config->mtu);  
}


void sip_config_uninit(LinphoneCore *lc)
{
        MSList *elem;
        int i;
        sip_config_t *config=&lc->sip_conf;
        lp_config_set_int(lc->config,"sip","sip_port",config->transports.udp_port);
        lp_config_set_int(lc->config,"sip","sip_tcp_port",config->transports.tcp_port);
        lp_config_set_int(lc->config,"sip","guess_hostname",config->guess_hostname);
        lp_config_set_string(lc->config,"sip","contact",config->contact);
        lp_config_set_int(lc->config,"sip","inc_timeout",config->inc_timeout);
        lp_config_set_int(lc->config,"sip","use_info",config->use_info);
        lp_config_set_int(lc->config,"sip","use_rfc2833",config->use_rfc2833);
        lp_config_set_int(lc->config,"sip","use_ipv6",config->ipv6_enabled);
        lp_config_set_int(lc->config,"sip","register_only_when_network_is_up",config->register_only_when_network_is_up);


        lp_config_set_int(lc->config,"sip","default_proxy",linphone_core_get_default_proxy(lc,NULL));
        
        for(elem=config->proxies,i=0;elem!=NULL;elem=ms_list_next(elem),i++){
                LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)(elem->data);
                linphone_proxy_config_write_to_config_file(lc->config,cfg,i);
                linphone_proxy_config_edit(cfg);        /* to unregister */
        }
        /*to ensure remove configs are erased:*/
        linphone_proxy_config_write_to_config_file(lc->config,NULL,i);

        for (i=0;i<20;i++){
                sal_iterate(lc->sal);
#ifndef WIN32
                usleep(100000);
#else
                Sleep(100);
#endif
        }

        ms_list_for_each(config->proxies,(void (*)(void*)) linphone_proxy_config_destroy);
        ms_list_free(config->proxies);
        config->proxies=NULL;
        
        linphone_proxy_config_write_to_config_file(lc->config,NULL,i);  /*mark the end */

        for(elem=lc->auth_info,i=0;elem!=NULL;elem=ms_list_next(elem),i++){
                LinphoneAuthInfo *ai=(LinphoneAuthInfo*)(elem->data);
                linphone_auth_info_write_config(lc->config,ai,i);
        }
        linphone_auth_info_write_config(lc->config,NULL,i); /* mark the end */
        ms_list_for_each(lc->auth_info,(void (*)(void*))linphone_auth_info_destroy);
        ms_list_free(lc->auth_info);
        lc->auth_info=NULL;
        
        sal_uninit(lc->sal);
        lc->sal=NULL;

        if (lc->sip_conf.guessed_contact)
                ms_free(lc->sip_conf.guessed_contact);
        if (config->contact)
                ms_free(config->contact);
        
}

void rtp_config_uninit(LinphoneCore *lc)
{
        rtp_config_t *config=&lc->rtp_conf;
        lp_config_set_int(lc->config,"rtp","audio_rtp_port",config->audio_rtp_port);
        lp_config_set_int(lc->config,"rtp","video_rtp_port",config->video_rtp_port);
        lp_config_set_int(lc->config,"rtp","audio_jitt_comp",config->audio_jitt_comp);
        lp_config_set_int(lc->config,"rtp","video_jitt_comp",config->video_jitt_comp);
        lp_config_set_int(lc->config,"rtp","nortp_timeout",config->nortp_timeout);
}

void sound_config_uninit(LinphoneCore *lc)
{
        sound_config_t *config=&lc->sound_conf;
        ms_free(config->cards);

        lp_config_set_string(lc->config,"sound","remote_ring",config->remote_ring);

        if (config->local_ring) ms_free(config->local_ring);
        if (config->remote_ring) ms_free(config->remote_ring);
        ms_snd_card_manager_destroy();
}

void video_config_uninit(LinphoneCore *lc)
{
        lp_config_set_string(lc->config,"video","size",video_size_get_name(linphone_core_get_preferred_video_size(lc)));
        lp_config_set_int(lc->config,"video","display",lc->video_conf.display);
        lp_config_set_int(lc->config,"video","capture",lc->video_conf.capture);
        lp_config_set_int(lc->config,"video","show_local",linphone_core_video_preview_enabled(lc));
        lp_config_set_int(lc->config,"video","self_view",linphone_core_self_view_enabled(lc));
        if (lc->video_conf.cams)
                ms_free(lc->video_conf.cams);
}

void codecs_config_uninit(LinphoneCore *lc)
{
        PayloadType *pt;
        codecs_config_t *config=&lc->codecs_conf;
        MSList *node;
        char key[50];
        int index;
        index=0;
        for(node=config->audio_codecs;node!=NULL;node=ms_list_next(node)){
                pt=(PayloadType*)(node->data);
                sprintf(key,"audio_codec_%i",index);
                lp_config_set_string(lc->config,key,"mime",pt->mime_type);
                lp_config_set_int(lc->config,key,"rate",pt->clock_rate);
                lp_config_set_int(lc->config,key,"enabled",linphone_core_payload_type_enabled(lc,pt));
                index++;
        }
        sprintf(key,"audio_codec_%i",index);
        lp_config_clean_section (lc->config,key);
        
        index=0;
        for(node=config->video_codecs;node!=NULL;node=ms_list_next(node)){
                pt=(PayloadType*)(node->data);
                sprintf(key,"video_codec_%i",index);
                lp_config_set_string(lc->config,key,"mime",pt->mime_type);
                lp_config_set_int(lc->config,key,"rate",pt->clock_rate);
                lp_config_set_int(lc->config,key,"enabled",linphone_core_payload_type_enabled(lc,pt));
                lp_config_set_string(lc->config,key,"recv_fmtp",pt->recv_fmtp);
                index++;
        }
        sprintf(key,"video_codec_%i",index);
        lp_config_clean_section (lc->config,key);
        
        ms_list_free(lc->codecs_conf.audio_codecs);
        ms_list_free(lc->codecs_conf.video_codecs);
}

void ui_config_uninit(LinphoneCore* lc)
{
        if (lc->friends){
                ms_list_for_each(lc->friends,(void (*)(void *))linphone_friend_destroy);
                ms_list_free(lc->friends);
                lc->friends=NULL;
        }
}

/**
 * Returns the LpConfig object used to manage the storage (config) file.
 *
 * @ingroup misc
 * The application can use the LpConfig object to insert its own private 
 * sections and pairs of key=value in the configuration file.
 * 
**/
LpConfig *linphone_core_get_config(LinphoneCore *lc){
        return lc->config;
}

static void linphone_core_uninit(LinphoneCore *lc)
{
        linphone_core_free_hooks(lc);
        while(lc->calls)
        {
                LinphoneCall *the_call = lc->calls->data;
                linphone_core_terminate_call(lc,the_call);
                linphone_core_iterate(lc);
#ifdef WIN32
                Sleep(50000);
#else
                usleep(50000);
#endif
        }
        if (lc->friends)
                ms_list_for_each(lc->friends,(void (*)(void *))linphone_friend_close_subscriptions);
        linphone_core_set_state(lc,LinphoneGlobalShutdown,"Shutting down");
#ifdef VIDEO_ENABLED
        if (lc->previewstream!=NULL){
                video_preview_stop(lc->previewstream);
                lc->previewstream=NULL;
        }
#endif
        ms_event_queue_destroy(lc->msevq);
        lc->msevq=NULL;
        /* save all config */
        net_config_uninit(lc);
        rtp_config_uninit(lc);
        if (lc->ringstream) ring_stop(lc->ringstream);
        sound_config_uninit(lc);
        video_config_uninit(lc);
        codecs_config_uninit(lc);
        ui_config_uninit(lc);
        sip_config_uninit(lc);
        if (lp_config_needs_commit(lc->config)) lp_config_sync(lc->config);
        lp_config_destroy(lc->config);
        lc->config = NULL; /* Mark the config as NULL to block further calls */
        sip_setup_unregister_all();

        ms_list_for_each(lc->call_logs,(void (*)(void*))linphone_call_log_destroy);
        lc->call_logs=ms_list_free(lc->call_logs);

        linphone_core_free_payload_types();
        ortp_exit();
        linphone_core_set_state(lc,LinphoneGlobalOff,"Off");
}

static void set_network_reachable(LinphoneCore* lc,bool_t isReachable, time_t curtime){
        ms_message("Network state is now [%s]",isReachable?"UP":"DOWN");
        // second get the list of available proxies
        const MSList *elem=linphone_core_get_proxy_config_list(lc);
        for(;elem!=NULL;elem=elem->next){
                LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)elem->data;
                if (linphone_proxy_config_register_enabled(cfg) ) {
                        if (!isReachable) {
                                cfg->registered=0;
                        }else{
                                cfg->commit=TRUE;
                        }
                }
        }
        lc->netup_time=curtime;
        lc->network_reachable=isReachable;
        if(!isReachable) {
                sal_unlisten_ports (lc->sal);
        } else {
                apply_transports(lc);
        }

}
void linphone_core_refresh_registers(LinphoneCore* lc) {
        const MSList *elem=linphone_core_get_proxy_config_list(lc);
        for(;elem!=NULL;elem=elem->next){
                LinphoneProxyConfig *cfg=(LinphoneProxyConfig*)elem->data;
                if (linphone_proxy_config_register_enabled(cfg) ) {
                        linphone_proxy_config_refresh_register(cfg);
                }
        }
}

void linphone_core_set_network_reachable(LinphoneCore* lc,bool_t isReachable) {
        //first disable automatic mode
        if (lc->auto_net_state_mon) {
                ms_message("Disabling automatic network state monitoring");
                lc->auto_net_state_mon=FALSE;
        }
        set_network_reachable(lc,isReachable, ms_time(NULL));
}

bool_t linphone_core_is_network_reachabled(LinphoneCore* lc) {
        return lc->network_reachable;
}
ortp_socket_t linphone_core_get_sip_socket(LinphoneCore *lc){
        return sal_get_socket(lc->sal);
}
/**
 * Destroys a LinphoneCore
 *
 * @ingroup initializing
**/
void linphone_core_destroy(LinphoneCore *lc){
        linphone_core_uninit(lc);
        ms_free(lc);
}
/**
 * Get the number of Call
 *
 * @ingroup call_control
**/
int linphone_core_get_calls_nb(const LinphoneCore *lc){
        return  ms_list_size(lc->calls);;
}

/**
 * Check if we do not have exceed the number of simultaneous call
 *
 * @ingroup call_control
**/
bool_t linphone_core_can_we_add_call(LinphoneCore *lc)
{
        if(linphone_core_get_calls_nb(lc) < NB_MAX_CALLS)
                return TRUE;
        ms_error("Maximum amount of simultaneous calls reached !");
        return FALSE;
}


int linphone_core_add_call( LinphoneCore *lc, LinphoneCall *call)
{
        if(linphone_core_can_we_add_call(lc))
        {
                lc->calls = ms_list_append(lc->calls,call);
                return 0;
        }
        return -1;
}

int linphone_core_del_call( LinphoneCore *lc, LinphoneCall *call)
{
        MSList *it;
        MSList *the_calls = lc->calls;
        
        it=ms_list_find(the_calls,call);
        if (it) 
        {
                the_calls = ms_list_remove_link(the_calls,it);
        }
        else
        {
                ms_warning("could not find the call into the list\n");
                return -1;
        }
        lc->calls = the_calls;
        return 0;
}

/**
 * Specifiies a ring back tone to be played to far end during incoming calls.
**/
void linphone_core_set_remote_ringback_tone(LinphoneCore *lc, const char *file){
        if (lc->sound_conf.ringback_tone){
                ms_free(lc->sound_conf.ringback_tone);
                lc->sound_conf.ringback_tone=NULL;
        }
        if (file)
                lc->sound_conf.ringback_tone=ms_strdup(file);
}

/**
 * Returns the ring back tone played to far end during incoming calls.
**/
const char *linphone_core_get_remote_ringback_tone(const LinphoneCore *lc){
        return lc->sound_conf.ringback_tone;
}

static PayloadType* find_payload_type_from_list(const char* type, int rate,const MSList* from) {
        const MSList *elem;
        for(elem=from;elem!=NULL;elem=elem->next){
                PayloadType *pt=(PayloadType*)elem->data;
                if ((strcmp((char*)type, payload_type_get_mime(pt)) == 0) && (rate == -1 || rate==pt->clock_rate)) {
                        return pt;
                }
        }
        return NULL;
}

/**
 * Get payload type  from mime type and clock rate
 * @ingroup media_parameters
 * This function searches in audio and video codecs for the given payload type name and clockrate.
 * Returns NULL if not found.
 */
PayloadType* linphone_core_find_payload_type(LinphoneCore* lc, const char* type, int rate) {
        PayloadType* result = find_payload_type_from_list(type, rate, linphone_core_get_audio_codecs(lc));
        if (result)  {
                return result;
        } else {
                result = find_payload_type_from_list(type, rate, linphone_core_get_video_codecs(lc));
                if (result) {
                        return result;
                }
        }
        /*not found*/
        return NULL;
}

const char *linphone_global_state_to_string(LinphoneGlobalState gs){
        switch(gs){
                case LinphoneGlobalOff:
                        return "LinphoneGlobalOff";
                break;
                case LinphoneGlobalOn:
                        return "LinphoneGlobalOn";
                break;
                case LinphoneGlobalStartup:
                        return "LinphoneGlobalStartup";
                break;
                case LinphoneGlobalShutdown:
                        return "LinphoneGlobalShutdown";
                break;
        }
        return NULL;
}

LinphoneGlobalState linphone_core_get_global_state(const LinphoneCore *lc){
        return lc->state;
}

LinphoneCallParams *linphone_core_create_default_call_parameters(LinphoneCore *lc){
        LinphoneCallParams *p=ms_new0(LinphoneCallParams,1);
        p->has_video=linphone_core_video_enabled(lc);
        return p;
}

const char *linphone_error_to_string(LinphoneReason err){
        switch(err){
                case LinphoneReasonNone:
                        return "No error";
                case LinphoneReasonNoResponse:
                        return "No response";
                case LinphoneReasonBadCredentials:
                        return "Bad credentials";
                case LinphoneReasonDeclined:
                        return "Call declined";
        }
        return "unknown error";
}
/**
 * Enables signaling keep alive
 */
void linphone_core_enable_keep_alive(LinphoneCore* lc,bool_t enable) {
        if (enable > 0) {
                sal_set_keepalive_period(lc->sal,lc->sip_conf.keepalive_period);
        } else {
                sal_set_keepalive_period(lc->sal,0);
        }
}
/**
 * Is signaling keep alive enabled
 */
bool_t linphone_core_keep_alive_enabled(LinphoneCore* lc) {
        return sal_get_keepalive_period(lc->sal) > 0;
}
        
void linphone_core_start_dtmf_stream(LinphoneCore* lc) {
        get_dtmf_gen(lc); /*make sure ring stream is started*/
        lc->ringstream_autorelease=FALSE; /*disable autorelease mode*/
}

void linphone_core_stop_dtmf_stream(LinphoneCore* lc) {
        if (lc->ringstream) ring_stop(lc->ringstream);
        lc->ringstream=NULL;
}

typedef struct Hook{
        LinphoneCoreIterateHook fun;
        void *data;
}Hook;

static Hook *hook_new(LinphoneCoreIterateHook hook, void *hook_data){
        Hook *h=ms_new(Hook,1);
        h->fun=hook;
        h->data=hook_data;
        return h;
}

static void hook_invoke(Hook *h){
        h->fun(h->data);
}

void linphone_core_add_iterate_hook(LinphoneCore *lc, LinphoneCoreIterateHook hook, void *hook_data){
        lc->hooks=ms_list_append(lc->hooks,hook_new(hook,hook_data));
}

static void linphone_core_run_hooks(LinphoneCore *lc){
        ms_list_for_each(lc->hooks,(void (*)(void*))hook_invoke);
}

static void linphone_core_free_hooks(LinphoneCore *lc){
        ms_list_for_each(lc->hooks,(void (*)(void*))ms_free);
        ms_list_free(lc->hooks);
        lc->hooks=NULL;
}

void linphone_core_remove_iterate_hook(LinphoneCore *lc, LinphoneCoreIterateHook hook, void *hook_data){
        MSList *elem;
        for(elem=lc->hooks;elem!=NULL;elem=elem->next){
                Hook *h=(Hook*)elem->data;
                if (h->fun==hook && h->data==hook_data){
                        ms_list_remove_link(lc->hooks,elem);
                        ms_free(h);
                        return;
                }
        }
        ms_error("linphone_core_remove_iterate_hook(): No such hook found.");
}