const char *sal_stream_description_get_type_as_string(const SalStreamDescription *desc){
if (desc->type==SalOther) return desc->typeother;
else return sal_stream_type_to_string(desc->type);
}
static belle_sdp_media_description_t *stream_description_to_sdp ( const SalMediaDescription *md, const SalStreamDescription *stream ) {
belle_sdp_mime_parameter_t* mime_param;
belle_sdp_media_description_t* media_desc;
int j;
MSList* pt_it;
PayloadType* pt;
char buffer[1024];
char* dir=NULL;
const char *rtp_addr;
const char *rtcp_addr;
int rtp_port;
int rtcp_port;
bool_t different_rtp_and_rtcp_addr;
rtp_addr=stream->rtp_addr;
rtcp_addr=stream->rtcp_addr;
rtp_port=stream->rtp_port;
rtcp_port=stream->rtcp_port;
media_desc = belle_sdp_media_description_create ( sal_stream_type_to_string ( stream->type )
,stream->rtp_port
,1
,sal_media_proto_to_string ( stream->proto )
,NULL );
if (stream->payloads) {
for ( pt_it=stream->payloads; pt_it!=NULL; pt_it=pt_it->next ) {
pt= ( PayloadType* ) pt_it->data;
mime_param= belle_sdp_mime_parameter_create ( pt->mime_type
, payload_type_get_number ( pt )
, pt->clock_rate
,stream->type==SalAudio?1:-1 );
belle_sdp_mime_parameter_set_parameters ( mime_param,pt->recv_fmtp );
if ( stream->ptime>0 ) {
belle_sdp_mime_parameter_set_ptime ( mime_param,stream->ptime );
}
belle_sdp_media_description_append_values_from_mime_parameter ( media_desc,mime_param );
belle_sip_object_unref ( mime_param );
}
} else {
/* to comply with SDP we cannot have an empty payload type number list */
/* as it happens only when mline is declined with a zero port, it does not matter to put whatever codec*/
belle_sip_list_t* format = belle_sip_list_append(NULL,0);
belle_sdp_media_set_media_formats(belle_sdp_media_description_get_media(media_desc),format);
}
/*only add a c= line within the stream description if address are differents*/
if (rtp_addr[0]!='\0' && strcmp(rtp_addr,md->addr)!=0){
bool_t inet6;
if (strchr(rtp_addr,':')!=NULL){
inet6=TRUE;
}else inet6=FALSE;
belle_sdp_media_description_set_connection(media_desc,belle_sdp_connection_create("IN", inet6 ? "IP6" : "IP4", rtp_addr));
}
if ( stream->bandwidth>0 )
belle_sdp_media_description_set_bandwidth ( media_desc,"AS",stream->bandwidth );
if ( stream->proto == SalProtoRtpSavp ) {
/* add crypto lines */
for ( j=0; j<SAL_CRYPTO_ALGO_MAX; j++ ) {
switch ( stream->crypto[j].algo ) {
case AES_128_SHA1_80:
snprintf ( buffer, sizeof ( buffer ), "%d %s inline:%s",
stream->crypto[j].tag, "AES_CM_128_HMAC_SHA1_80", stream->crypto[j].master_key );
belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( "crypto",buffer ) );
break;
case AES_128_SHA1_32:
snprintf ( buffer, sizeof ( buffer ), "%d %s inline:%s",
stream->crypto[j].tag, "AES_CM_128_HMAC_SHA1_32", stream->crypto[j].master_key );
belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( "crypto",buffer ) );
break;
case AES_128_NO_AUTH:
ms_warning ( "Unsupported crypto suite: AES_128_NO_AUTH" );
break;
case NO_CIPHER_SHA1_80:
ms_warning ( "Unsupported crypto suite: NO_CIPHER_SHA1_80" );
break;
default:
j = SAL_CRYPTO_ALGO_MAX;
/* no break */
}
}
}
switch ( stream->dir ) {
case SalStreamSendRecv:
/*dir="sendrecv";*/
dir=NULL;
break;
case SalStreamRecvOnly:
dir="recvonly";
break;
case SalStreamSendOnly:
dir="sendonly";
break;
case SalStreamInactive:
dir="inactive";
break;
}
if ( dir ) belle_sdp_media_description_add_attribute ( media_desc,belle_sdp_attribute_create ( dir,NULL ) );
if (rtp_port != 0) {
different_rtp_and_rtcp_addr = (rtcp_addr[0] != '\0') && (strcmp(rtp_addr, rtcp_addr) != 0);
if ((rtcp_port != (rtp_port + 1)) || (different_rtp_and_rtcp_addr == TRUE)) {
if (different_rtp_and_rtcp_addr == TRUE) {
snprintf(buffer, sizeof(buffer), "%u IN IP4 %s", rtcp_port, rtcp_addr);
} else {
snprintf(buffer, sizeof(buffer), "%u",rtcp_port);
}
belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("rtcp",buffer));
}
}
if (stream->ice_completed == TRUE) {
belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("nortpproxy","yes"));
}
if (stream->ice_mismatch == TRUE) {
belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-mismatch",NULL));
} else {
if (rtp_port != 0) {
if (stream->ice_pwd[0] != '\0')
belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-pwd",stream->ice_pwd));
if (stream->ice_ufrag[0] != '\0')
belle_sdp_media_description_add_attribute(media_desc,belle_sdp_attribute_create ("ice-ufrag",stream->ice_ufrag));
add_ice_candidates(media_desc,stream);
add_ice_remote_candidates(media_desc,stream);
}
}
return media_desc;
}
