- Make capicommand(echocancel) setting non-permanent.

Setting is restored after hangup.

README

@@ -145,7 +145,8 @@ Enable/Disable echosquelch:
 Enable/Disable echocancel:
     Enable or disable echo-cancel provided by CAPI driver/hardware.
     You may need to disable echo-cancel when e.g. data/fax transmission handled
-    by non-CAPI application.
+    by non-CAPI application. After hangup, this setting is restored to value
+    set in capi.conf.
         Example:
         exten => s,1,capicommand(echocancel|yes)
           or

chan_capi.c

@@ -1112,6 +1112,7 @@ static void interface_cleanup(struct capi_pvt *i)
 	i->MessageNumber = 0;
 	i->NCCI = 0;
 	i->onholdPLCI = 0;
+	i->doEC = i->doEC_global;
 
 	memset(i->cid, 0, sizeof(i->cid));
 	memset(i->dnid, 0, sizeof(i->dnid));
@@ -5001,6 +5002,7 @@ int mkif(struct cc_capi_conf *conf)
 		tmp->controller = unit;
 		capi_used_controllers |= (1 << unit);
 		tmp->doEC = conf->echocancel;
+		tmp->doEC_global = conf->echocancel;
 		tmp->ecOption = conf->ecoption;
 		if (conf->ecnlp) tmp->ecOption |= 0x01; /* bit 0 of ec-option is NLP */
 		tmp->ecTail = conf->ectail;

chan_capi.h

@@ -314,6 +314,7 @@ struct capi_pvt {
 	int doDTMF;
 	/* CAPI echo cancellation */
 	int doEC;
+	int doEC_global;
 	int ecOption;
 	int ecTail;
 	int ecSelector;