Add option for enabling and disabling echo cancellation

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@27523 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_zap.c

@@ -2900,6 +2900,16 @@ static int zt_setoption(struct ast_channel *chan, int option, void *data, int da
 		ast_log(LOG_DEBUG, "Set Operator Services mode, value: %d on %s/%s\n",
 			oprmode->mode, chan->name,oprmode->peer->name);;
 		break;
+	case AST_OPTION_ECHOCAN:
+		cp = (char *) data;
+		if (*cp) {
+			ast_log(LOG_DEBUG, "Enabling echo cancelation on %s\n", chan->name);
+			zt_enable_ec(p);
+		} else {
+			ast_log(LOG_DEBUG, "Disabling echo cancelation on %s\n", chan->name);
+			zt_disable_ec(p);
+		}
+		break;
 	}
 	errno = 0;
 

include/asterisk/frame.h

@@ -303,6 +303,9 @@ enum ast_control_frame_type {
 /* set channel into "Operator Services" mode */
 #define	AST_OPTION_OPRMODE		7
 
+/*! Explicitly enable or disable echo cancelation for the given channel */
+#define	AST_OPTION_ECHOCAN		8
+
 struct oprmode {
 	struct ast_channel *peer;
 	int mode;