From f30ad96b3f467739c38ff415e80bffc4afff1da7 Mon Sep 17 00:00:00 2001
From: Viktor Litvinov <viktor.litvinov@net2phone.com>
Date: Wed, 2 Oct 2024 01:57:12 +0200
Subject: [PATCH] res_rtp_asterisk.c: Set Mark on rtp when timestamp skew is
 too big

Set Mark bit in rtp stream when timestamp skew is bigger than MAX_TIMESTAMP_SKEW.

Fixes: #927
---
 res/res_rtp_asterisk.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index 1953e15e29..60e931c71b 100644
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -5267,6 +5267,11 @@ static int rtp_raw_write(struct ast_rtp_instance *instance, struct ast_frame *fr
 	}
 
 	if (ast_test_flag(frame, AST_FRFLAG_HAS_TIMING_INFO)) {
+		if (abs(frame->ts * rate - (int)rtp->lastts) > MAX_TIMESTAMP_SKEW) {
+			ast_verbose("(%p) RTP audio difference is %d set mark\n",
+				instance, abs(frame->ts * rate - (int)rtp->lastts));
+			mark = 1;
+		}
 		rtp->lastts = frame->ts * rate;
 	}