possible fix for WANPIPE-5

git-svn-id: http://svn.openzap.org/svn/openzap/trunk@816 a93c3328-9c30-0410-af19-c9cd2b2d52af

libs/openzap/src/include/zap_types.h

@@ -371,7 +371,8 @@ typedef enum {
 	ZAP_CHANNEL_3WAY = (1 << 20),
 	ZAP_CHANNEL_PROGRESS = (1 << 21),
 	ZAP_CHANNEL_MEDIA = (1 << 22),
-	ZAP_CHANNEL_ANSWERED = (1 << 23)
+	ZAP_CHANNEL_ANSWERED = (1 << 23),
+	ZAP_CHANNEL_MUTE = (1 << 24)
 } zap_channel_flag_t;
 
 typedef enum {

libs/openzap/src/zap_io.c

@@ -2012,6 +2012,7 @@ OZ_DECLARE(zap_status_t) zap_channel_read(zap_channel_t *zchan, void *data, zap_
 			}
 		}
 	
+		
 		if (zap_test_flag(zchan, ZAP_CHANNEL_DTMF_DETECT) && !zap_channel_test_feature(zchan, ZAP_CHANNEL_FEATURE_DTMF_DETECT)) {
 			teletone_dtmf_detect(&zchan->dtmf_detect, sln, (int)slen);
 			teletone_dtmf_get(&zchan->dtmf_detect, digit_str, sizeof(digit_str));
@@ -2041,13 +2042,16 @@ OZ_DECLARE(zap_status_t) zap_channel_read(zap_channel_t *zchan, void *data, zap_
 					if (zap_test_flag(zchan, ZAP_CHANNEL_SUPRESS_DTMF)) {
 						zchan->skip_read_frames = 20;
 					}
-					if (zchan->skip_read_frames > 0) {
-						memset(data, 0, *datalen);
-						zchan->skip_read_frames--;
 				}
 			}
 		}
 	}
+
+	if (zchan->skip_read_frames > 0 || zap_test_flag(zchan, ZAP_CHANNEL_MUTE)) {
+		memset(data, 0, *datalen);
+		if (zchan->skip_read_frames > 0) {
+			zchan->skip_read_frames--;
+		}
 	}  
 
 	return status;