diff --git a/services/audioflinger/Effects.h b/services/audioflinger/Effects.h
index bc9bc94..3b62652 100644
--- a/services/audioflinger/Effects.h
+++ b/services/audioflinger/Effects.h
@@ -117,6 +117,8 @@
     void             unlock() { mLock.unlock(); }
     bool             isOffloadable() const
                         { return (mDescriptor.flags & EFFECT_FLAG_OFFLOAD_SUPPORTED) != 0; }
+    bool             isImplementationSoftware() const
+                        { return (mDescriptor.flags & EFFECT_FLAG_HW_ACC_MASK) == 0; }
     status_t         setOffloaded(bool offloaded, audio_io_handle_t io);
     bool             isOffloaded() const;
     void             addEffectToHal_l();
@@ -330,6 +332,11 @@
 
     void syncHalEffectsState();
 
+    bool hasSoftwareEffect() const;
+
+    // isCompatibleWithThread_l() must be called with thread->mLock held
+    bool isCompatibleWithThread_l(const sp<ThreadBase>& thread) const;
+
     void dump(int fd, const Vector<String16>& args);
 
 protected:
@@ -361,30 +368,30 @@
 
     void setThread(const sp<ThreadBase>& thread);
 
-    wp<ThreadBase> mThread;     // parent mixer thread
-    Mutex mLock;                // mutex protecting effect list
-    Vector< sp<EffectModule> > mEffects; // list of effect modules
-    audio_session_t mSessionId; // audio session ID
-    int16_t *mInBuffer;         // chain input buffer
-    int16_t *mOutBuffer;        // chain output buffer
+             wp<ThreadBase> mThread;     // parent mixer thread
+    mutable  Mutex mLock;        // mutex protecting effect list
+             Vector< sp<EffectModule> > mEffects; // list of effect modules
+             audio_session_t mSessionId; // audio session ID
+             int16_t *mInBuffer;         // chain input buffer
+             int16_t *mOutBuffer;        // chain output buffer
 
     // 'volatile' here means these are accessed with atomic operations instead of mutex
     volatile int32_t mActiveTrackCnt;    // number of active tracks connected
     volatile int32_t mTrackCnt;          // number of tracks connected
 
-    int32_t mTailBufferCount;   // current effect tail buffer count
-    int32_t mMaxTailBuffers;    // maximum effect tail buffers
-    bool mOwnInBuffer;          // true if the chain owns its input buffer
-    int mVolumeCtrlIdx;         // index of insert effect having control over volume
-    uint32_t mLeftVolume;       // previous volume on left channel
-    uint32_t mRightVolume;      // previous volume on right channel
-    uint32_t mNewLeftVolume;       // new volume on left channel
-    uint32_t mNewRightVolume;      // new volume on right channel
-    uint32_t mStrategy; // strategy for this effect chain
-    // mSuspendedEffects lists all effects currently suspended in the chain.
-    // Use effect type UUID timelow field as key. There is no real risk of identical
-    // timeLow fields among effect type UUIDs.
-    // Updated by updateSuspendedSessions_l() only.
-    KeyedVector< int, sp<SuspendedEffectDesc> > mSuspendedEffects;
+             int32_t mTailBufferCount;   // current effect tail buffer count
+             int32_t mMaxTailBuffers;    // maximum effect tail buffers
+             bool mOwnInBuffer;          // true if the chain owns its input buffer
+             int mVolumeCtrlIdx;         // index of insert effect having control over volume
+             uint32_t mLeftVolume;       // previous volume on left channel
+             uint32_t mRightVolume;      // previous volume on right channel
+             uint32_t mNewLeftVolume;       // new volume on left channel
+             uint32_t mNewRightVolume;      // new volume on right channel
+             uint32_t mStrategy; // strategy for this effect chain
+             // mSuspendedEffects lists all effects currently suspended in the chain.
+             // Use effect type UUID timelow field as key. There is no real risk of identical
+             // timeLow fields among effect type UUIDs.
+             // Updated by updateSuspendedSessions_l() only.
+             KeyedVector< int, sp<SuspendedEffectDesc> > mSuspendedEffects;
     volatile int32_t mForceVolume; // force next volume command because a new effect was enabled
 };