BIG refactoring in pjsua_media.c:
 - switchboard/conf detection is done at run-time, removing #ifdefs
     - use one function, open_snd_dev() to open device
     - use one function, create_aud_param() to initialize 
       audio parameters:
         - get the default from device
         - override with user settings previously done with
           pjsua_snd_set_setting() (new API)
 - added new API to set/get sound device settings. The settings are
    semi permanent, it will be used for future opening of sound dev:
     - pjsua_snd_set_setting()
     - pjsua_snd_get_setting()
 - snd_auto_close_time default value changed to 1 (from -1)
 - both pjsua_enum_snd_devs() and pjsua_enum_aud_devs() API are now
    supported (previously it was done with #ifdef).
 - make_call() will not open the sound device is switchboard is 
    used



git-svn-id: https://svn.pjsip.org/repos/pjproject/branches/projects/aps-direct@2493 74dad513-b988-da41-8d7b-12977e46ad98
diff --git a/pjsip/include/pjsua-lib/pjsua_internal.h b/pjsip/include/pjsua-lib/pjsua_internal.h
index a4af71b..a144c97 100644
--- a/pjsip/include/pjsua-lib/pjsua_internal.h
+++ b/pjsip/include/pjsua-lib/pjsua_internal.h
@@ -272,8 +272,15 @@
     pjmedia_endpt	*med_endpt; /**< Media endpoint.		*/
     pjsua_conf_setting	 mconf_cfg; /**< Additionan conf. bridge. param */
     pjmedia_conf	*mconf;	    /**< Conference bridge.		*/
-    int			 cap_dev;   /**< Capture device ID.		*/
-    int			 play_dev;  /**< Playback device ID.		*/
+    pj_bool_t		 is_mswitch;/**< Are we using audio switchboard
+				         (a.k.a APS-Direct)		*/
+
+    /* Sound device */
+    pjmedia_aud_dev_index cap_dev;  /**< Capture device ID.		*/
+    pjmedia_aud_dev_index play_dev; /**< Playback device ID.		*/
+    pj_uint32_t		 aud_svmask;/**< Which settings to save		*/
+    pjmedia_aud_param	 aud_param; /**< User settings to sound dev	*/
+    pj_bool_t		 aud_open_cnt;/**< How many # device is opened	*/
     pj_bool_t		 no_snd;    /**< No sound (app will manage it)	*/
     pj_pool_t		*snd_pool;  /**< Sound's private pool.		*/
     pjmedia_snd_port	*snd_port;  /**< Sound port.			*/