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 m...@jerris.com:
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 a.wehrm...@yandex.com 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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