Turn on DENOISE filter for all conference participants.

(Fixes SWP-238)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@225048 65c4cc65-6c06-0410-ace0-fbb531ad65f3

CHANGES

@@ -78,6 +78,9 @@ Applications
    to spy on.
  * The ChanSpy application also now has the 'E' option, which spies on a single
    channel and exits when that channel hangs up.
+ * The MeetMe application now turns on the DENOISE() function by default, for
+   each participant.  In our tests, this has significantly decreased background
+   noise (especially noisy data centers).
 
 Dialplan Functions
 ------------------

apps/app_meetme.c

@@ -2072,7 +2072,7 @@ static int conf_run(struct ast_channel *chan, struct ast_conference *conf, int c
 	struct timeval now;
 	struct ast_dsp *dsp = NULL;
 	struct ast_app *agi_app;
-	char *agifile;
+	char *agifile, *mod_speex;
 	const char *agifiledefault = "conf-background.agi", *tmpvar;
 	char meetmesecs[30] = "";
 	char exitcontext[AST_MAX_CONTEXT] = "";
@@ -2406,6 +2406,12 @@ static int conf_run(struct ast_channel *chan, struct ast_conference *conf, int c
 		goto outrun;
 	}
 
+	/* Reduce background noise from each participant */
+	if ((mod_speex = ast_module_helper("", "codec_speex.so", 0, 0, 0, 0)) || (mod_speex = ast_module_helper("", "codec_speex", 0, 0, 0, 0))) {
+		ast_free(mod_speex);
+		ast_func_write(chan, "DENOISE(rx)", "on");
+	}
+
 	retrydahdi = (strcasecmp(chan->tech->type, "DAHDI") || (chan->audiohooks || chan->monitor) ? 1 : 0);
 	user->dahdichannel = !retrydahdi;