From 232874f4b68180ddff4a59c8080c3e8239151d97 Mon Sep 17 00:00:00 2001
From: Jianjun Zhu <jianjun.zhu@intel.com>
Date: Thu, 1 Jun 2023 15:16:57 +0800
Subject: [PATCH] Ignore rejected sections to avoid malformatted SDP.

m=section could be rejected because of no match codecs. In this case,
munging SDP here may result media format description to be empty.
---
 talk/owt/sdk/base/sdputils.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/talk/owt/sdk/base/sdputils.cc b/talk/owt/sdk/base/sdputils.cc
index a8f495366..00a1281a4 100644
--- a/talk/owt/sdk/base/sdputils.cc
+++ b/talk/owt/sdk/base/sdputils.cc
@@ -256,6 +256,10 @@ std::string SdpUtils::SetPreferCodecs(const std::string& sdp,
       RTC_LOG(LS_WARNING) << "Wrong SDP format description: " << m_line;
       return sdp;
     }
+    if (m_line_vector[1] == "0") {
+      RTC_LOG(LS_WARNING) << "Ignore rejected section: " << m_line;
+      return sdp;
+    }
     std::stringstream m_line_stream;
     for (int i = 0; i < 3; i++) {
       if (i < 2)