diff --git a/services/audioflinger/AudioFlinger.cpp b/services/audioflinger/AudioFlinger.cpp
index bc2fdd6..a43afac 100644
--- a/services/audioflinger/AudioFlinger.cpp
+++ b/services/audioflinger/AudioFlinger.cpp
@@ -985,8 +985,10 @@
 
 // ----------------------------------------------------------------------------
 
-AudioFlinger::ThreadBase::ThreadBase(const sp<AudioFlinger>& audioFlinger, int id, uint32_t device)
+AudioFlinger::ThreadBase::ThreadBase(const sp<AudioFlinger>& audioFlinger, int id, uint32_t device,
+        type_t type)
     :   Thread(false),
+        mType(type),
         mAudioFlinger(audioFlinger), mSampleRate(0), mFrameCount(0), mChannelCount(0),
         mFrameSize(1), mFormat(AUDIO_FORMAT_INVALID), mStandby(false), mId(id), mExiting(false),
         mDevice(device)
@@ -1372,8 +1374,9 @@
 AudioFlinger::PlaybackThread::PlaybackThread(const sp<AudioFlinger>& audioFlinger,
                                              AudioStreamOut* output,
                                              int id,
-                                             uint32_t device)
-    :   ThreadBase(audioFlinger, id, device),
+                                             uint32_t device,
+                                             type_t type)
+    :   ThreadBase(audioFlinger, id, device, type),
         mMixBuffer(NULL), mSuspended(0), mBytesWritten(0), mOutput(output),
         mLastWriteTime(0), mNumWrites(0), mNumDelayedWrites(0), mInWrite(false)
 {
@@ -1845,11 +1848,11 @@
 
 // ----------------------------------------------------------------------------
 
-AudioFlinger::MixerThread::MixerThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
-    :   PlaybackThread(audioFlinger, output, id, device),
+AudioFlinger::MixerThread::MixerThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output,
+        int id, uint32_t device, type_t type)
+    :   PlaybackThread(audioFlinger, output, id, device, type),
         mAudioMixer(NULL), mPrevMixerStatus(MIXER_IDLE)
 {
-    mType = ThreadBase::MIXER;
     mAudioMixer = new AudioMixer(mFrameCount, mSampleRate);
 
     // FIXME - Current mixer implementation only supports stereo output
@@ -2515,9 +2518,8 @@
 
 // ----------------------------------------------------------------------------
 AudioFlinger::DirectOutputThread::DirectOutputThread(const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device)
-    :   PlaybackThread(audioFlinger, output, id, device)
+    :   PlaybackThread(audioFlinger, output, id, device, DIRECT)
 {
-    mType = ThreadBase::DIRECT;
 }
 
 AudioFlinger::DirectOutputThread::~DirectOutputThread()
@@ -2994,10 +2996,11 @@
 
 // ----------------------------------------------------------------------------
 
-AudioFlinger::DuplicatingThread::DuplicatingThread(const sp<AudioFlinger>& audioFlinger, AudioFlinger::MixerThread* mainThread, int id)
-    :   MixerThread(audioFlinger, mainThread->getOutput(), id, mainThread->device()), mWaitTimeMs(UINT_MAX)
+AudioFlinger::DuplicatingThread::DuplicatingThread(const sp<AudioFlinger>& audioFlinger,
+        AudioFlinger::MixerThread* mainThread, int id)
+    :   MixerThread(audioFlinger, mainThread->getOutput(), id, mainThread->device(), DUPLICATING),
+        mWaitTimeMs(UINT_MAX)
 {
-    mType = ThreadBase::DUPLICATING;
     addOutputTrack(mainThread);
 }
 
@@ -4267,11 +4270,9 @@
                                          uint32_t channels,
                                          int id,
                                          uint32_t device) :
-    ThreadBase(audioFlinger, id, device),
+    ThreadBase(audioFlinger, id, device, RECORD),
     mInput(input), mTrack(NULL), mResampler(NULL), mRsmpOutBuffer(NULL), mRsmpInBuffer(NULL)
 {
-    mType = ThreadBase::RECORD;
-
     snprintf(mName, kNameLength, "AudioIn_%d", id);
 
     mReqChannelCount = popcount(channels);
diff --git a/services/audioflinger/AudioFlinger.h b/services/audioflinger/AudioFlinger.h
index ece4ba2..76beeaf 100644
--- a/services/audioflinger/AudioFlinger.h
+++ b/services/audioflinger/AudioFlinger.h
@@ -277,17 +277,17 @@
 
     class ThreadBase : public Thread {
     public:
-        ThreadBase (const sp<AudioFlinger>& audioFlinger, int id, uint32_t device);
-        virtual             ~ThreadBase();
 
-
-        enum type {
+        enum type_t {
             MIXER,              // Thread class is MixerThread
             DIRECT,             // Thread class is DirectOutputThread
             DUPLICATING,        // Thread class is DuplicatingThread
             RECORD              // Thread class is RecordThread
         };
 
+        ThreadBase (const sp<AudioFlinger>& audioFlinger, int id, uint32_t device, type_t type);
+        virtual             ~ThreadBase();
+
         status_t dumpBase(int fd, const Vector<String16>& args);
         status_t dumpEffectChains(int fd, const Vector<String16>& args);
 
@@ -408,7 +408,7 @@
         };
 
         virtual     status_t    initCheck() const = 0;
-                    int         type() const { return mType; }
+                    type_t      type() const { return mType; }
                     uint32_t    sampleRate() const;
                     int         channelCount() const;
                     audio_format_t format() const;
@@ -530,7 +530,7 @@
         friend class RecordThread;
         friend class RecordTrack;
 
-                    int                     mType;
+                    const type_t            mType;
                     Condition               mWaitWorkCV;
                     sp<AudioFlinger>        mAudioFlinger;
                     uint32_t                mSampleRate;
@@ -691,7 +691,8 @@
             DuplicatingThread*          mSourceThread;
         };  // end of OutputTrack
 
-        PlaybackThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id, uint32_t device);
+        PlaybackThread (const sp<AudioFlinger>& audioFlinger, AudioStreamOut* output, int id,
+                        uint32_t device, type_t type);
         virtual             ~PlaybackThread();
 
         virtual     status_t    dump(int fd, const Vector<String16>& args);
@@ -817,7 +818,8 @@
         MixerThread (const sp<AudioFlinger>& audioFlinger,
                      AudioStreamOut* output,
                      int id,
-                     uint32_t device);
+                     uint32_t device,
+                     type_t type = MIXER);
         virtual             ~MixerThread();
 
         // Thread virtuals