diff --git a/services/audioflinger/Effects.h b/services/audioflinger/Effects.h
index 2826297..036f855 100644
--- a/services/audioflinger/Effects.h
+++ b/services/audioflinger/Effects.h
@@ -36,6 +36,7 @@
     virtual uint32_t sampleRate() const = 0;
     virtual audio_channel_mask_t channelMask() const = 0;
     virtual uint32_t channelCount() const = 0;
+    virtual audio_channel_mask_t hapticChannelMask() const = 0;
     virtual size_t frameCount() const = 0;
 
     // Non trivial methods usually implemented with help from ThreadBase:
@@ -257,6 +258,9 @@
 
     sp<EffectModule> asEffectModule() override { return this; }
 
+    static bool      isHapticGenerator(const effect_uuid_t* type);
+    bool             isHapticGenerator() const;
+
     void             dump(int fd, const Vector<String16>& args);
 
 private:
@@ -503,6 +507,8 @@
     // isCompatibleWithThread_l() must be called with thread->mLock held
     bool isCompatibleWithThread_l(const sp<ThreadBase>& thread) const;
 
+    bool containsHapticGeneratingEffect_l();
+
     sp<EffectCallbackInterface> effectCallback() const { return mEffectCallback; }
     wp<ThreadBase> thread() const { return mEffectCallback->thread(); }
 
@@ -534,6 +540,7 @@
         uint32_t sampleRate() const override;
         audio_channel_mask_t channelMask() const override;
         uint32_t channelCount() const override;
+        audio_channel_mask_t hapticChannelMask() const override;
         size_t frameCount() const override;
         uint32_t latency() const override;
 
@@ -685,6 +692,7 @@
         uint32_t sampleRate() const override;
         audio_channel_mask_t channelMask() const override;
         uint32_t channelCount() const override;
+        audio_channel_mask_t hapticChannelMask() const override { return AUDIO_CHANNEL_NONE; }
         size_t frameCount() const override  { return 0; }
         uint32_t latency() const override  { return 0; }