Multi frequency DTMF support - sender side

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 2279 matching lines @@
   if (_rtpRtcpModule->SendTelephoneEventOutband(
       event, duration_ms, kTelephoneEventAttenuationdB) != 0) {
     _engineStatisticsPtr->SetLastError(
         VE_SEND_DTMF_FAILED, kTraceWarning,
         "SendTelephoneEventOutband() failed to send event");
     return -1;
   }
   return 0;
 }
 
-int Channel::SetSendTelephoneEventPayloadType(int payload_type) {
+int Channel::SetSendTelephoneEventPayloadType(int payload_type,
+                                              int payload_frequency) {
   WEBRTC_TRACE(kTraceInfo, kTraceVoice, VoEId(_instanceId, _channelId),
                "Channel::SetSendTelephoneEventPayloadType()");
   RTC_DCHECK_LE(0, payload_type);
   RTC_DCHECK_GE(127, payload_type);
   CodecInst codec = {0};
-  codec.plfreq = 8000;
   codec.pltype = payload_type;
+  codec.plfreq = payload_frequency;
   memcpy(codec.plname, "telephone-event", 16);
   if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
     _rtpRtcpModule->DeRegisterSendPayload(codec.pltype);
     if (_rtpRtcpModule->RegisterSendPayload(codec) != 0) {
       _engineStatisticsPtr->SetLastError(
           VE_RTP_RTCP_MODULE_ERROR, kTraceError,
           "SetSendTelephoneEventPayloadType() failed to register send"
           "payload type");
       return -1;
     }
@@ skipping 926 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