codec tweaks (do a make sure)

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@4077 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_core.c

@@ -782,6 +782,19 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_init(switch_codec_t *codec, ch
 		return SWITCH_STATUS_GENERR;
 	}
 
+    /* If no specific codec interval is requested opt for 20ms above all else because lots of stuff assumes it */
+    if (!ms) {
+        for (iptr = codec_interface->implementations; iptr; iptr = iptr->next) {
+            if ((!rate || rate == iptr->samples_per_second) &&
+                (20 == (iptr->microseconds_per_frame / 1000)) &&
+                (!channels || channels == iptr->number_of_channels)) {
+                implementation = iptr;
+                goto found;
+            }
+        }
+    }
+
+    /* Either looking for a specific interval or there was no interval specified and there wasn't one @20ms available*/
 	for (iptr = codec_interface->implementations; iptr; iptr = iptr->next) {
 		if ((!rate || rate == iptr->samples_per_second) &&
 			(!ms || ms == (iptr->microseconds_per_frame / 1000)) &&
@@ -791,6 +804,8 @@ SWITCH_DECLARE(switch_status_t) switch_core_codec_init(switch_codec_t *codec, ch
 		}
 	}
 
+ found:
+
 	if (implementation) {
 		switch_status_t status;
 		codec->codec_interface = codec_interface;