On Mon, Dec 6, 2010 at 11:53 PM, Werner Dittmann
<Werner.Dittmann at t-online.de> wrote:
> Hi all,
>
>> I understand that you need a new callback in pjsua, we could add a
>> generic facility for app to attach media transport adapters to pjsua
>> call.
>
> An idea could be:
> - application creates transport_zrtp and initializes ZRTP. This transport
> ?is ready to go
> - new "pjsua_add_transport(call_id, transport_zrtp, position)". This call
> ?should add the transport to an existing transport chain at the given
> ?position (for example: position 0 is lowest transport, e.g. transport_udp,
> ?1 is one above, etc and maybe -1 means "on top of existin chain).
>
We can't do that, as currently we don't have such "position" information.
My idea is to add a new pjsua callback like this:
typedef enum pjsua_create_media_transport_flag
{
/**
* This flag indicates that the media transport must also close its
* "member" or "child" transport when pjmedia_transport_close() is
* called. If this flag is not specified, then the media transport
* must not call pjmedia_transport_close() of its member transport.
*/
PJSUA_MED_TP_CLOSE_MEMBER = 1
} pjsua_create_media_transport_flag;
/**
* This callback can be used by application to implement custom media
* transport adapter for the call, or to replace the media transport
* with something completely new altogether.
*
* This callback is called when a new call is created. The library has
* created a media transport for the call, and it is provided as the
* \a base_tp argument of this callback. Upon returning, the callback
* must return an instance of media transport to be used by the call.
*
* @param call_id Call ID
* @param media_idx The media index in the SDP for which this media
* transport will be used.
* @param base_tp The media transport which otherwise will be
* used by the call has this callback not been
* implemented.
* @param flags Bitmask from pjsua_create_media_transport_flag.
*
* @return The callback must return an instance of media
* transport to be used by the call.
*/
pjmedia_transport *on_create_media_transport(pjsua_call_id call_id,
unsigned media_idx,
pjmedia_transport *base_tp,
unsigned flags);
-Benny
