add low bandwidth call param

coreapi/linphonecall.c

@@ -854,6 +854,9 @@ const PayloadType* linphone_call_params_get_used_video_codec(const LinphoneCallP
 	return cp->video_codec;
 }
 
+bool_t linphone_call_params_low_bandwidth_enabled(const LinphoneCallParams *cp) {
+	return cp->low_bandwidth;
+}
 /**
  * Returns whether video is enabled.
 **/

coreapi/linphonecore.h

@@ -204,7 +204,14 @@ bool_t linphone_call_params_early_media_sending_enabled(const LinphoneCallParams
 bool_t linphone_call_params_local_conference_mode(const LinphoneCallParams *cp);
 void linphone_call_params_set_audio_bandwidth_limit(LinphoneCallParams *cp, int bw);
 void linphone_call_params_destroy(LinphoneCallParams *cp);
-
+/**
+ * @ingroup call_control
+ * Use to know if this call has been configured in low bandwidth mode.
+ * This mode can be automatically discovered thanks to a stun server when activate_edge_workarounds=1 in section [net] of configuration file
+ * <br> When enabled, this param may transform a call request with video in audio only mode.
+ * @return TRUE if low bandwidth has been configured/detected
+ */
+bool_t linphone_call_params_low_bandwidth_enabled(const LinphoneCallParams *cp);
 /**
  * Enum describing failure reasons.
  * @ingroup initializing

coreapi/misc.c

@@ -586,7 +586,7 @@ void linphone_core_adapt_to_network(LinphoneCore *lc, int ping_time_ms, Linphone
 			params->up_bw=params->down_bw=edge_bw;
 			params->up_ptime=params->down_ptime=edge_ptime;
 			params->has_video=FALSE;
-			
+			params->low_bandwidth=TRUE;
 		}/*else use default settings */
 	}
 }

coreapi/private.h

@@ -79,7 +79,7 @@ struct _LinphoneCallParams{
 	bool_t real_early_media; /*send real media even during early media (for outgoing calls)*/
 	bool_t in_conference; /*in conference mode */
 	bool_t pad;
-	
+	bool_t low_bandwidth;
 };
     
 typedef struct _CallCallbackObj