From adaf1342e7a1d5284902b8890d84ddad4f122498 Mon Sep 17 00:00:00 2001
From: Richard Fuchs <rfuchs@sipwise.com>
Date: Mon, 7 Jul 2025 09:52:50 -0400
Subject: [PATCH] MT#55283 fix clashing PT numbers

closes #1960

Change-Id: Ia69cbb69a826141b85a65cd7487a655e047e88d2
(cherry picked from commit fe39a7927b3c6aca2c092303849e2cd7e9896ffa)
---
 daemon/codec.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/daemon/codec.c b/daemon/codec.c
index 460a22674..d6f0171a1 100644
--- a/daemon/codec.c
+++ b/daemon/codec.c
@@ -6000,6 +6000,14 @@ void codec_store_transcode(struct codec_store *cs, str_q *offer, struct codec_st
 			ilogs(codec, LOG_DEBUG, "Adding codec " STR_FORMAT
 					" for transcoding",
 					STR_FMT(codec));
+			__auto_type pt_num =
+				pt ? t_hash_table_lookup(cs->codecs, GINT_TO_POINTER(pt->payload_type)) : NULL;
+			if (pt_num) {
+				ilogs(codec, LOG_DEBUG, "RFC-defined payload type number %d is already in use, "
+						"using generic number for " STR_FORMAT,
+						pt->payload_type, STR_FMT(codec));
+				pt->payload_type = -1;
+			}
 			// create new payload type
 			pt = codec_add_payload_type_pt(pt, cs->media, NULL, orig);
 			if (!pt)