Merged revisions 224670 via svnmerge from

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

........
  r224670 | kpfleming | 2009-10-19 18:44:07 -0500 (Mon, 19 Oct 2009) | 7 lines
  
  Correct timestamp calculations when RTP sample rates over 8kHz are used.
  
  While testing some endpoints that support 16kHz and 32kHz sample rates, some
  log messages were generated due to calc_rxstamp() computing timestamps in a way
  that produced odd results, so this patch sanitizes the result of the
  computations.
........


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@224671 65c4cc65-6c06-0410-ace0-fbb531ad65f3

res/res_rtp_asterisk.c

@@ -1212,6 +1212,18 @@ static int ast_rtp_write(struct ast_rtp_instance *instance, struct ast_frame *fr
 	return 0;
 }
 
+static void sanitize_tv(struct timeval *tv)
+{
+	while (tv->tv_usec < 0) {
+		tv->tv_usec += 1000000;
+		tv->tv_sec -= 1;
+	}
+	while (tv->tv_usec >= 1000000) {
+		tv->tv_usec -= 1000000;
+		tv->tv_sec += 1;
+	}
+}
+
 static void calc_rxstamp(struct timeval *tv, struct ast_rtp *rtp, unsigned int timestamp, int mark)
 {
 	struct timeval now;
@@ -1232,21 +1244,14 @@ static void calc_rxstamp(struct timeval *tv, struct ast_rtp *rtp, unsigned int t
 		rtp->rxcore.tv_usec -= (timestamp % rate) * 125;
 		/* Round to 0.1ms for nice, pretty timestamps */
 		rtp->rxcore.tv_usec -= rtp->rxcore.tv_usec % 100;
-		if (rtp->rxcore.tv_usec < 0) {
-			/* Adjust appropriately if necessary */
-			rtp->rxcore.tv_usec += 1000000;
-			rtp->rxcore.tv_sec -= 1;
-		}
+		sanitize_tv(&rtp->rxcore);
 	}
 
 	gettimeofday(&now,NULL);
 	/* rxcore is the mapping between the RTP timestamp and _our_ real time from gettimeofday() */
 	tv->tv_sec = rtp->rxcore.tv_sec + timestamp / rate;
 	tv->tv_usec = rtp->rxcore.tv_usec + (timestamp % rate) * 125;
-	if (tv->tv_usec >= 1000000) {
-		tv->tv_usec -= 1000000;
-		tv->tv_sec += 1;
-	}
+	sanitize_tv(tv);
 	prog = (double)((timestamp-rtp->seedrxts)/(float)(rate));
 	dtv = (double)rtp->drxcore + (double)(prog);
 	current_time = (double)now.tv_sec + (double)now.tv_usec/1000000;