= Background =

== pjsua_call.c ==
Currently this is how the media channel interacts with SIP call in PJSUA-LIB.

 '''pjsua_call_make_call()''' : ::
 '''pjsua_call_on_incoming()''' : ::
 '''pjsua_call_update()''' : ::
 '''pjsua_call_reinvite()''' : ::
 '''pjsua_call_on_rx_offer()''' : ::
 '''pjsua_call_on_create_offer()''' : ::
   pjsua_media_channel_init();[[BR]]
   pjsua_media_channel_create_sdp(&local_sdp, rem_sdp);

 '''pjsua_call_on_media_update()''' : ::
   pjsua_media_channel_update();

 '''pjsua_call_on_state_changed(DISCONNECTED)''' : ::
 '''pjsua_call_on_media_update(HOLD)''' : ::
   pjsua_media_channel_deinit();

== pjsua_media.c ==

and this is the implementation of media channel functions above:

 '''pjsua_media_channel_init()''' : ::
   pjmedia_transport_srtp_create();

 '''pjsua_media_channel_create_sdp()''' : ::
   pjmedia_endpt_create_sdp();[[BR]]
   pjmedia_transport_media_create();

 '''pjsua_media_channel_update()''' : ::
   pjmedia_transport_media_start();[[BR]]
   pjmedia_session_create();

 '''pjsua_media_channel_deinit()''' : ::
   stop_media_session();[[BR]]
   pjmedia_transport_media_stop();[[BR]]
   pjmedia_transport_close(srtp);



= New =

''New code in italics''.

== pjsua_call.c ==
Currently this is how the media channel interacts with SIP call in PJSUA-LIB.

 '''pjsua_call_make_call()''' : ::
 '''pjsua_call_on_incoming()''' : ::
   ~~pjsua_media_channel_init();~~[[BR]]
   ~~pjsua_media_channel_create_sdp(&local_sdp, rem_sdp);~~[[BR]]
   ''pjsua_media_channel_init(&local_sdp, rem_sdp);''

 '''pjsua_call_update()''' : ::
 '''pjsua_call_reinvite()''' : ::
 '''pjsua_call_on_rx_offer()''' : ::
 '''pjsua_call_on_create_offer()''' : ::
   ~~pjsua_media_channel_init(&local_sdp, rem_sdp);~~[[BR]]
   pjsua_media_channel_create_sdp(&local_sdp, rem_sdp);

 '''pjsua_call_on_media_update()''' : ::
   pjsua_media_channel_update();

 '''pjsua_call_on_state_changed(DISCONNECTED)''' : ::
 '''pjsua_call_on_media_update(HOLD)''' : ::
   pjsua_media_channel_deinit();

== pjsua_media.c ==

and this is the implementation of media channel functions above:

 '''pjsua_media_channel_init(&local_sdp, rem_sdp)''' : ::
   pjmedia_transport_srtp_create();[[BR]]
   ~~pjmedia_transport_media_create(local_sdp, rem_sdp);~~[[BR]]
   ''pjmedia_transport_media_create(rem_sdp);''[[BR]]
   ''pjmedia_transport_encode_sdp(local_sdp, rem_sdp);''

 '''pjsua_media_channel_create_sdp(&local_sdp, rem_sdp)''' : ::
   pjmedia_endpt_create_sdp();[[BR]]
   ~~pjmedia_transport_media_create(local_sdp, rem_sdp);~~[[BR]]
   ''pjmedia_transport_encode_sdp(local_sdp, rem_sdp);''

 '''pjsua_media_channel_update()''' : ::
   pjmedia_transport_media_start();[[BR]]
   pjmedia_session_create();

 '''pjsua_media_channel_deinit()''' : ::
   stop_media_session();[[BR]]
   pjmedia_transport_media_stop();[[BR]]
   pjmedia_transport_close(srtp);