diff --git a/services/audioflinger/PlaybackTracks.h b/services/audioflinger/PlaybackTracks.h
index 8aeae7d..bad3ca8 100644
--- a/services/audioflinger/PlaybackTracks.h
+++ b/services/audioflinger/PlaybackTracks.h
@@ -127,6 +127,7 @@
                     mHapticIntensity = hapticIntensity;
                 }
             }
+            sp<os::ExternalVibration> getExternalVibration() const { return mExternalVibration; }
 
 protected:
     // for numerous
@@ -207,6 +208,16 @@
     bool                mHapticPlaybackEnabled = false; // indicates haptic playback enabled or not
     // intensity to play haptic data
     AudioMixer::haptic_intensity_t mHapticIntensity = AudioMixer::HAPTIC_SCALE_NONE;
+    class AudioVibrationController : public os::BnExternalVibrationController {
+    public:
+        explicit AudioVibrationController(Track* track) : mTrack(track) {}
+        binder::Status mute(/*out*/ bool *ret) override;
+        binder::Status unmute(/*out*/ bool *ret) override;
+    private:
+        Track* const mTrack;
+    };
+    sp<AudioVibrationController> mAudioVibrationController;
+    sp<os::ExternalVibration>    mExternalVibration;
 
 private:
     // The following fields are only for fast tracks, and should be in a subclass