From dda130c334e15f62ac5a5601f51059a7a9dfd2f3 Mon Sep 17 00:00:00 2001
From: Mark Spencer <markster@digium.com>
Date: Thu, 11 May 2006 08:47:37 +0000
Subject: [PATCH] Set "MARK" whenever SSRC changes (bug #6934)
git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@26759 65c4cc65-6c06-0410-ace0-fbb531ad65f3
---
rtp.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/rtp.c b/rtp.c
index d0d84453df..208e582871 100644
--- a/rtp.c
+++ b/rtp.c
@@ -93,6 +93,7 @@ struct ast_rtp {
struct ast_frame f;
unsigned char rawdata[8192 + AST_FRIENDLY_OFFSET];
unsigned int ssrc; /*!< Synchronization source, RFC 3550, page 10. */
+ unsigned int rxssrc;
unsigned int lastts;
unsigned int lastdigitts;
unsigned int lastrxts;
@@ -430,6 +431,7 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
int ext;
int x;
char iabuf[INET_ADDRSTRLEN];
+ unsigned int ssrc;
unsigned int timestamp;
unsigned int *rtpheader;
struct rtpPayloadType rtpPT;
@@ -485,6 +487,14 @@ struct ast_frame *ast_rtp_read(struct ast_rtp *rtp)
ext = seqno & (1 << 28);
seqno &= 0xffff;
timestamp = ntohl(rtpheader[1]);
+ ssrc = ntohl(rtpheader[2]);
+
+ if (!mark && rtp->rxssrc && rtp->rxssrc != ssrc) {
+ ast_log(LOG_WARNING, "Forcing Marker bit, because SSRC has changed\n");
+ mark = 1;
+ }
+
+ rtp->rxssrc = ssrc;
if (padding) {
/* Remove padding bytes */
--
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