Set the preferred DSCP value for Rtp data channel to be DSCP_AF41.

webrtc/media/sctp/sctpdataengine.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 315 matching lines @@
 }
 
 }  // namespace
 
 SctpDataEngine::SctpDataEngine() : codecs_(1, GetSctpDataCodec()) {}
 
 SctpDataEngine::~SctpDataEngine() {}
 
 // Called on the worker thread.
 DataMediaChannel* SctpDataEngine::CreateChannel(
-    DataChannelType data_channel_type) {
+    DataChannelType data_channel_type,
+    const MediaConfig& config) {
   if (data_channel_type != DCT_SCTP) {
     return NULL;
   }
-  return new SctpDataMediaChannel(rtc::Thread::Current());
+  return new SctpDataMediaChannel(rtc::Thread::Current(), config);
 }
 
 // static
 SctpDataMediaChannel* SctpDataMediaChannel::GetChannelFromSocket(
     struct socket* sock) {
   struct sockaddr* addrs = nullptr;
   int naddrs = usrsctp_getladdrs(sock, 0, &addrs);
   if (naddrs <= 0 || addrs[0].sa_family != AF_CONN) {
     return nullptr;
   }
@@ skipping 20 matching lines @@
   SctpDataMediaChannel* channel = GetChannelFromSocket(sock);
   if (!channel) {
     LOG(LS_ERROR) << "SendThresholdCallback: Failed to get channel for socket "
                   << sock;
     return 0;
   }
   channel->OnSendThresholdCallback();
   return 0;
 }
 
-SctpDataMediaChannel::SctpDataMediaChannel(rtc::Thread* thread)
-    : worker_thread_(thread),
+SctpDataMediaChannel::SctpDataMediaChannel(rtc::Thread* thread,
+                                           const MediaConfig& config)
+    : DataMediaChannel(config),
+      worker_thread_(thread),
       local_port_(kSctpDefaultPort),
       remote_port_(kSctpDefaultPort),
       sock_(NULL),
       sending_(false),
       receiving_(false),
-      debug_name_("SctpDataMediaChannel") {
-}
+      debug_name_("SctpDataMediaChannel") {}
 
 SctpDataMediaChannel::~SctpDataMediaChannel() {
   CloseSctpSocket();
 }
 
 void SctpDataMediaChannel::OnSendThresholdCallback() {
   RTC_DCHECK(rtc::Thread::Current() == worker_thread_);
   SignalReadyToSend(true);
 }
 
@@ skipping 657 matching lines @@
     }
     case MSG_SCTPOUTBOUNDPACKET: {
       std::unique_ptr<OutboundPacketMessage> pdata(
           static_cast<OutboundPacketMessage*>(msg->pdata));
       OnPacketFromSctpToNetwork(pdata->data().get());
       break;
     }
   }
 }
 }  // namespace cricket