Merged revisions 174583 via svnmerge from

https://origsvn.digium.com/svn/asterisk/branches/1.4

........
  r174583 | mnicholson | 2009-02-10 11:52:42 -0600 (Tue, 10 Feb 2009) | 18 lines
  
  Improve behavior of jitterbuffer when maxjitterbuffer is set.
  
  This change improves the way the jitterbuffer handles maxjitterbuffer and
  dramatically reduces the number of frames dropped when maxjitterbuffer is
  exceeded.  In the previous jitterbuffer, when maxjitterbuffer was exceeded, all
  new frames were dropped until the jitterbuffer is empty.  This change modifies
  the code to only drop frames until maxjitterbuffer is no longer exceeded.
  
  Also, previously when maxjitterbuffer was exceeded, dropped frames were not
  tracked causing stats for dropped frames to be incorrect, this change also
  addresses that problem.
  
  (closes issue #14044)
  Patches:
        bug14044-1.diff uploaded by mnicholson (license 96)
  Tested by: mnicholson
  Review: http://reviewboard.digium.com/r/144/
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@174584 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/jitterbuf.c

@@ -510,27 +510,33 @@ enum jb_return_code jb_put(jitterbuf *jb, void *data, const enum jb_frame_type t
 
 	jb_dbg2("jb_put(%x,%x,%ld,%ld,%ld)\n", jb, data, ms, ts, now);
 
-	jb->info.frames_in++;
+	numts = 0;
+	if (jb->frames)
+		numts = jb->frames->prev->ts - jb->frames->ts;
 
-	if (jb->frames && jb->dropem) 
+	if (numts >= jb->info.conf.max_jitterbuf) {
+		if (!jb->dropem) {
+			ast_debug(1, "Attempting to exceed Jitterbuf max %ld timeslots\n",
+				jb->info.conf.max_jitterbuf);
+			jb->dropem = 1;
+		}
+		jb->info.frames_dropped++;
 		return JB_DROP;
-	jb->dropem = 0;
+	} else {
+		jb->dropem = 0;
+	}
 
 	if (type == JB_TYPE_VOICE) {
 		/* presently, I'm only adding VOICE frames to history and drift calculations; mostly because with the
 		 * IAX integrations, I'm sending retransmitted control frames with their awkward timestamps through */
-		if (history_put(jb,ts,now,ms))
+		if (history_put(jb,ts,now,ms)) {
+			jb->info.frames_dropped++;
 			return JB_DROP;
+		}
 	}
-	numts = 0;
-	if (jb->frames)
-		numts = jb->frames->prev->ts - jb->frames->ts;
-	if (numts >= jb->info.conf.max_jitterbuf) {
-		ast_debug(1, "Attempting to exceed Jitterbuf max %ld timeslots\n",
-			jb->info.conf.max_jitterbuf);
-		jb->dropem = 1;
-		return JB_DROP;
-	}
+
+	jb->info.frames_in++;
+
 	/* if put into head of queue, caller needs to reschedule */
 	if (queue_put(jb,data,type,ms,ts)) {
 		return JB_SCHED;