Alright, from the beginning:
---------------------------------------------------
That's how I create the stack:
sip_stack = nua_create( sip_root,
sip_evt_dispatcher,
reinterpret_cast< nua_magic_t* >( this ),
TAG_IF( (! uas_id.empty()), SIPTAG_USER_AGENT_STR(
uas_id.c_str() ) ),
SIPTAG_ALLOW_STR(
"INVITE,ACK,CANCEL,BYE,OPTIONS,PRACK,UPDATE,MESSAGE" ),
NUTAG_URL( my_url.c_str() ),
TAG_END() );
---------------------------------------------------
Placing a call involves these calls:
nh = nua_handle( sip_stack, reinterpret_cast< nua_hmagic_t* >( this ),
SIPTAG_TO( to ),
TAG_IF( (NULL != from), SIPTAG_FROM( from ) ),
TAG_IF( ((NULL == from) && (strlen(from_user ? from_user :
"") > 0)), NUTAG_M_USERNAME( from_user ) ),
TAG_IF( session_timer.useSessionTimer(),
NUTAG_SESSION_REFRESHER( nua_local_refresher ) ),
TAG_IF( session_timer.useSessionTimer(), NUTAG_MIN_SE(
session_timer.minimumSessionExpires() ) ),
TAG_IF( session_timer.useSessionTimer(),
NUTAG_SESSION_TIMER( session_timer.sessionExpires() ) ),
TAG_IF( session_timer.useSessionTimer(),
NUTAG_REFRESH_WITHOUT_SDP( 1 ) ),
TAG_END() );
<some other stuff (i.e. generation of SDP string)>
nua_invite( nh,
TAG_IF( (! additional_header_str.empty()), SIPTAG_HEADER_STR(
additional_header_str.c_str() ) ),
SOATAG_USER_SDP_STR( sdp_os.str().c_str() ),
SOATAG_RTP_SELECT( SOA_RTP_SELECT_COMMON ),
TAG_END() );
---------------------------------------------------
Accepting a call looks like this:
nua_respond( reinterpret_cast< nua_handle_t* >( call_id() ),
status_code,
sip_status_phrase( status_code ),
TAG_IF( strlen( sdp_str ), SOATAG_USER_SDP_STR( sdp_str ) ),
TAG_IF( (! aux_codecs.empty()), SOATAG_AUDIO_AUX(
aux_codecs.c_str() ) ),
TAG_IF( strlen( reason_str ), SIPTAG_REASON_STR( reason_str )
),
TAG_IF( use_session_timer, NUTAG_SESSION_REFRESHER(
nua_local_refresher ) ),
TAG_IF( use_session_timer, NUTAG_MIN_SE(
session_timer.minimumSessionExpires() ) ),
TAG_IF( use_session_timer, NUTAG_SESSION_TIMER(
session_timer.sessionExpires() ) ),
TAG_IF( use_session_timer, NUTAG_REFRESH_WITHOUT_SDP( 1 ) ),
TAG_END() );
---------------------------------------------------
My first (naive) attempt was trying to update the media mode like so:
std::string sdp_media_mode_line( "a=" );
sdp_media_mode_line.append( media_mode.sdp_str() );
nua_invite( reinterpret_cast< nua_handle_t* >( call_id() ),
SOATAG_USER_SDP_STR( sdp_media_mode_line.c_str() ),
TAG_END() );
Of course this doesn't work since SOA doesn't know what media that attribute
belongs to...
I didn't try to include the media line (yet).
What I'm basically trying to do is to change a certain attribute for all media
of a certain type at once.
Is there a more elegant way than USER_SDP_STR, or is it the recommended way to
go?
Regards,
Andreas
03.09.2014, 15:23, "Michael Jerris" <[email protected]>:
> I know it works with USER_SDP_STR, what exactly is your call to
> update/invite? are you doing ACTIVE_AUDIO(1) ?
>
> On Sep 3, 2014, at 9:13 AM, Andreas Wehrmann <[email protected]> wrote:
>> Hi!
>>
>> I'm somewhat at a loss here.
>> I'm in a SIP call that I made or accepted with one of
>> a=[inactive|recvonly|sendonly|sendrecv] in the SDP.
>> There is only one media (audio).
>> When I make or answer a call, I create the complete SDP and provide it
>> to nua with SOATAG_USER_SDP_STR which is working just fine.
>>
>> Now I would like to be able to change the media mode mid-call using the
>> same SDP as before with a new media mode setting, but how do I do that?
>> I tried calling nua_update/nua_invite using SOATAG_ACTIVE_AUDIO but it
>> was to no avail.
>>
>> Is SOATAG_ACTIVE_AUDIO the way to go or should I be doing something
>> different?
>>
>> Any help is appreciated.
>>
>> Best regards,
>> Andreas
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