Reset the BWE when the network changes

webrtc/p2p/base/p2ptransportchannel.cc

 /*
  *  Copyright 2004 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.
  */
 
 #include "webrtc/p2p/base/p2ptransportchannel.h"
 
 #include <algorithm>
 #include <set>
 
 #include "webrtc/base/common.h"
 #include "webrtc/base/crc32.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/stringencode.h"
 #include "webrtc/p2p/base/candidate.h"
+#include "webrtc/p2p/base/candidatepairinterface.h"
 #include "webrtc/p2p/base/common.h"
 #include "webrtc/p2p/base/relayport.h"  // For RELAY_PORT_TYPE.
 #include "webrtc/p2p/base/stunport.h"   // For STUN_PORT_TYPE.
 #include "webrtc/system_wrappers/include/field_trial.h"
 
 namespace {
 
 // messages for queuing up work for ourselves
 enum { MSG_SORT = 1, MSG_CHECK_AND_PING };
 
@@ skipping 1127 matching lines @@
     if (old_best_connection) {
       LOG_J(LS_INFO, this) << "Previous best connection: "
                            << old_best_connection->ToString();
     }
     LOG_J(LS_INFO, this) << "New best connection: "
                          << best_connection_->ToString();
     SignalRouteChange(this, best_connection_->remote_candidate());
   } else {
     LOG_J(LS_INFO, this) << "No best connection";
   }
+  // TODO(honghaiz): rename best_connection_ with selected_connection_ or
+  // selected_candidate pair_.
+  SignalSelectedCandidatePairChanged(this, best_connection_);
 }
 
 // Warning: UpdateState should eventually be called whenever a connection
 // is added, deleted, or the write state of any connection changes so that the
 // transport controller will get the up-to-date channel state. However it
 // should not be called too often; in the case that multiple connection states
 // change, it should be called after all the connection states have changed. For
 // example, we call this at the end of SortConnections.
 void P2PTransportChannel::UpdateState() {
   state_ = ComputeState();
@@ skipping 441 matching lines @@
 
   // During the initial state when nothing has been pinged yet, return the first
   // one in the ordered |connections_|.
   return *(std::find_if(connections_.begin(), connections_.end(),
                         [conn1, conn2](Connection* conn) {
                           return conn == conn1 || conn == conn2;
                         }));
 }
 
 }  // namespace cricket