Added a level indicator to new mixer.

webrtc/modules/audio_mixer/new_audio_conference_mixer.h

Index: webrtc/modules/audio_mixer/new_audio_conference_mixer.h
diff --git a/webrtc/modules/audio_mixer/new_audio_conference_mixer.h b/webrtc/modules/audio_mixer/new_audio_conference_mixer.h
index 561cf88604f58cf51ee4352f10e8e7df0bd6f1e2..9f4a1305a8c88cbafdeefdba01d1504a412eceb1 100644
--- a/webrtc/modules/audio_mixer/new_audio_conference_mixer.h
+++ b/webrtc/modules/audio_mixer/new_audio_conference_mixer.h
@@ -59,6 +59,13 @@ class NewAudioConferenceMixer {
   virtual bool AnonymousMixabilityStatus(
       const MixerAudioSource& audio_source) const = 0;
 
+  // Output level functions for VoEVolumeControl. Return value
+  // between 0 and 9 is returned by voe::AudioLevel.
+  virtual uint32_t GetOutputAudioLevel() = 0;
+
+  // Return value between 0 and 0x7fff is returned by voe::AudioLevel.
+  virtual uint32_t GetOutputAudioLevelFullRange() = 0;

[kwiberg-webrtc, 2016/08/23 12:58:26]

Style guide says to use regular int for small integers like these.

[aleloi, 2016/08/24 07:19:47]

Done.

+
  protected:
   NewAudioConferenceMixer() {}
 };