Calculate the signal level on the media stream local audio track

content/renderer/media/webrtc/webrtc_local_audio_track_adapter.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/webrtc/webrtc_local_audio_track_adapter.h"
 
 #include "base/logging.h"
 #include "content/renderer/media/webrtc/webrtc_audio_sink_adapter.h"
 #include "content/renderer/media/webrtc_local_audio_track.h"
 
@@ skipping 62 matching lines @@
       return;
     }
   }
 }
 
 std::vector<int> WebRtcLocalAudioTrackAdapter::VoeChannels() const {
   base::AutoLock auto_lock(lock_);
   return voe_channels_;
 }
 
+void WebRtcLocalAudioTrackAdapter::SetSignalLevel(int signal_level) {
+  // TODO(xians): Implements this.
+}
+
 void WebRtcLocalAudioTrackAdapter::AddChannel(int channel_id) {
   DVLOG(1) << "WebRtcLocalAudioTrack::AddChannel(channel_id="
            << channel_id << ")";
   base::AutoLock auto_lock(lock_);
   if (std::find(voe_channels_.begin(), voe_channels_.end(), channel_id) !=
       voe_channels_.end()) {
     // We need to handle the case when the same channel is connected to the
     // track more than once.
     return;
   }
@@ skipping 13 matching lines @@
 
 webrtc::AudioSourceInterface* WebRtcLocalAudioTrackAdapter::GetSource() const {
   return track_source_;
 }
 
 cricket::AudioRenderer* WebRtcLocalAudioTrackAdapter::GetRenderer() {
   return this;
 }
 
 }  // namespace content