Refactor WVoE DTMF handling #2

webrtc/voice_engine/channel.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 2354 matching lines @@
     return 0;
 }
 
 int Channel::SendTelephoneEventOutband(unsigned char eventCode,
                                        int lengthMs, int attenuationDb,
                                        bool playDtmfEvent)
 {
     WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
                "Channel::SendTelephoneEventOutband(..., playDtmfEvent=%d)",
                playDtmfEvent);
+    if (!Sending()) {
+      return -1;
+    }
 
     _playOutbandDtmfEvent = playDtmfEvent;
 
     if (_rtpRtcpModule->SendTelephoneEventOutband(eventCode, lengthMs,
                                                  attenuationDb) != 0)
     {
         _engineStatisticsPtr->SetLastError(
             VE_SEND_DTMF_FAILED,
             kTraceWarning,
             "SendTelephoneEventOutband() failed to send event");
@@ skipping 1557 matching lines @@
   int64_t min_rtt = 0;
   if (_rtpRtcpModule->RTT(remoteSSRC, &rtt, &avg_rtt, &min_rtt, &max_rtt)
       != 0) {
     return 0;
   }
   return rtt;
 }
 
 }  // namespace voe
 }  // namespace webrtc