Don't translate time for packets with no delivery

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@2631 65c4cc65-6c06-0410-ace0-fbb531ad65f3

translate.c

@@ -140,6 +140,7 @@ struct ast_frame *ast_translate(struct ast_trans_pvt *path, struct ast_frame *f,
 	p = path;
 	/* Feed the first frame into the first translator */
 	p->step->framein(p->state, f);
+	if (f->delivery.tv_sec || f->delivery.tv_usec) {
 		if (path->nextin.tv_sec || path->nextin.tv_usec) {
 			/* Make sure this is in line with what we were expecting */
 			if ((path->nextin.tv_sec != f->delivery.tv_sec) ||
@@ -177,6 +178,7 @@ struct ast_frame *ast_translate(struct ast_trans_pvt *path, struct ast_frame *f,
 			path->nextin.tv_usec -= 1000000;
 			path->nextin.tv_sec++;
 		}
+	}
 	if (consume)
 		ast_frfree(f);
 	while(p) {
@@ -189,6 +191,7 @@ struct ast_frame *ast_translate(struct ast_trans_pvt *path, struct ast_frame *f,
 		if (p->next) 
 			p->next->step->framein(p->next->state, out);
 		else {
+			if (f->delivery.tv_sec || f->delivery.tv_usec) {
 				/* Use next predicted outgoing timestamp */
 				out->delivery.tv_sec = path->nextout.tv_sec;
 				out->delivery.tv_usec = path->nextout.tv_usec;
@@ -201,6 +204,10 @@ struct ast_frame *ast_translate(struct ast_trans_pvt *path, struct ast_frame *f,
 					path->nextout.tv_sec++;
 					path->nextout.tv_usec -= 1000000;
 				}
+			} else {
+				out->delivery.tv_sec = 0;
+				out->delivery.tv_usec = 0;
+			}
 			return out;
 		}
 		p = p->next;