diff --git a/camera/libcameraservice/CameraHardwareStub.cpp b/camera/libcameraservice/CameraHardwareStub.cpp
index 35f4846..8ad1f69 100644
--- a/camera/libcameraservice/CameraHardwareStub.cpp
+++ b/camera/libcameraservice/CameraHardwareStub.cpp
@@ -368,6 +368,12 @@
     return mParameters;
 }
 
+status_t CameraHardwareStub::sendCommand(int32_t command, int32_t arg1,
+                                         int32_t arg2)
+{
+    return BAD_VALUE;
+}
+
 void CameraHardwareStub::release()
 {
 }
diff --git a/camera/libcameraservice/CameraHardwareStub.h b/camera/libcameraservice/CameraHardwareStub.h
index f957fa8..8a67024 100644
--- a/camera/libcameraservice/CameraHardwareStub.h
+++ b/camera/libcameraservice/CameraHardwareStub.h
@@ -57,6 +57,8 @@
     virtual status_t    dump(int fd, const Vector<String16>& args) const;
     virtual status_t    setParameters(const CameraParameters& params);
     virtual CameraParameters  getParameters() const;
+    virtual status_t    sendCommand(int32_t command, int32_t arg1,
+                                    int32_t arg2);
     virtual void release();
 
     static sp<CameraHardwareInterface> createInstance();
diff --git a/camera/libcameraservice/CameraService.cpp b/camera/libcameraservice/CameraService.cpp
index bab7d08..8279914 100644
--- a/camera/libcameraservice/CameraService.cpp
+++ b/camera/libcameraservice/CameraService.cpp
@@ -195,7 +195,7 @@
     android_atomic_dec(&mUsers);
 }
 
-static sp<MediaPlayer> newMediaPlayer(const char *file) 
+static sp<MediaPlayer> newMediaPlayer(const char *file)
 {
     sp<MediaPlayer> mp = new MediaPlayer();
     if (mp->setDataSource(file) == NO_ERROR) {
@@ -267,7 +267,7 @@
 status_t CameraService::Client::unlock()
 {
     int callingPid = getCallingPid();
-    LOGD("unlock from pid %d (mClientPid %d)", callingPid, mClientPid);    
+    LOGD("unlock from pid %d (mClientPid %d)", callingPid, mClientPid);
     Mutex::Autolock _l(mLock);
     // allow anyone to use camera
     status_t result = checkPid();
@@ -648,7 +648,7 @@
 status_t CameraService::Client::startPreview()
 {
     LOGD("startPreview (pid %d)", getCallingPid());
-    
+
     return startCameraMode(CAMERA_PREVIEW_MODE);
 }
 
@@ -1134,6 +1134,21 @@
     return params;
 }
 
+status_t CameraService::Client::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
+{
+    LOGD("sendCommand (pid %d)", getCallingPid());
+    Mutex::Autolock lock(mLock);
+    status_t result = checkPid();
+    if (result != NO_ERROR) return result;
+
+    if (mHardware == 0) {
+        LOGE("mHardware is NULL, returning.");
+        return INVALID_OPERATION;
+    }
+
+    return mHardware->sendCommand(cmd, arg1, arg2);
+}
+
 void CameraService::Client::copyFrameAndPostCopiedFrame(sp<IMemoryHeap> heap, size_t offset, size_t size)
 {
     LOGV("copyFrameAndPostCopiedFrame");
diff --git a/camera/libcameraservice/CameraService.h b/camera/libcameraservice/CameraService.h
index 0a909cf..2e3597f 100644
--- a/camera/libcameraservice/CameraService.h
+++ b/camera/libcameraservice/CameraService.h
@@ -122,6 +122,9 @@
         // get preview/capture parameters - key/value pairs
         virtual String8         getParameters() const;
 
+        // send command to camera driver
+        virtual status_t        sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
+
         // our client...
         const sp<ICameraClient>&    getCameraClient() const { return mCameraClient; }
 
diff --git a/include/ui/Camera.h b/include/ui/Camera.h
index 9ceb8fd..5219772 100644
--- a/include/ui/Camera.h
+++ b/include/ui/Camera.h
@@ -78,6 +78,12 @@
     CAMERA_MSG_ALL_MSGS         = 0x1FF
 };
 
+// cmdType in sendCommand functions
+enum {
+    CAMERA_CMD_START_SMOOTH_ZOOM     = 1,
+    CAMERA_CMD_STOP_SMOOTH_ZOOM      = 2,
+};
+
 // camera fatal errors
 enum {
     CAMERA_ERROR_UKNOWN  = 1,
@@ -155,6 +161,9 @@
             // get preview/capture parameters - key/value pairs
             String8     getParameters() const;
 
+            // send command to camera driver
+            status_t    sendCommand(int32_t cmd, int32_t arg1, int32_t arg2);
+
             void        setListener(const sp<CameraListener>& listener);
             void        setPreviewCallbackFlags(int preview_callback_flag);
 
diff --git a/include/ui/CameraHardwareInterface.h b/include/ui/CameraHardwareInterface.h
index 5fbb7d8..af40f31 100644
--- a/include/ui/CameraHardwareInterface.h
+++ b/include/ui/CameraHardwareInterface.h
@@ -147,7 +147,7 @@
      * Returns true if recording is enabled.
      */
     virtual bool        recordingEnabled() = 0;
-    
+
     /**
      * Release a record frame previously returned by CAMERA_MSG_VIDEO_FRAME.
      */
@@ -186,11 +186,16 @@
     virtual CameraParameters  getParameters() const = 0;
 
     /**
+     * Send command to camera driver.
+     */
+    virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0;
+
+    /**
      * Release the hardware resources owned by this object.  Note that this is
      * *not* done in the destructor.
      */
     virtual void release() = 0;
-    
+
     /**
      * Dump state of the camera hardware
      */
diff --git a/include/ui/ICamera.h b/include/ui/ICamera.h
index 7595e36..5642691 100644
--- a/include/ui/ICamera.h
+++ b/include/ui/ICamera.h
@@ -87,6 +87,9 @@
 
     // get preview/capture parameters - key/value pairs
     virtual String8         getParameters() const = 0;
+
+    // send command to camera driver
+    virtual status_t        sendCommand(int32_t cmd, int32_t arg1, int32_t arg2) = 0;
 };
 
 // ----------------------------------------------------------------------------
diff --git a/libs/ui/Camera.cpp b/libs/ui/Camera.cpp
index 0c6d340..09a36f1 100644
--- a/libs/ui/Camera.cpp
+++ b/libs/ui/Camera.cpp
@@ -278,6 +278,15 @@
     return params;
 }
 
+// send command to camera driver
+status_t Camera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
+{
+    LOGD("sendCommand");
+    sp <ICamera> c = mCamera;
+    if (c == 0) return NO_INIT;
+    return c->sendCommand(cmd, arg1, arg2);
+}
+
 void Camera::setListener(const sp<CameraListener>& listener)
 {
     Mutex::Autolock _l(mLock);
diff --git a/libs/ui/ICamera.cpp b/libs/ui/ICamera.cpp
index fd7e084..e1b3ec7 100644
--- a/libs/ui/ICamera.cpp
+++ b/libs/ui/ICamera.cpp
@@ -36,6 +36,7 @@
     TAKE_PICTURE,
     SET_PARAMETERS,
     GET_PARAMETERS,
+    SEND_COMMAND,
     CONNECT,
     LOCK,
     UNLOCK,
@@ -205,6 +206,17 @@
         remote()->transact(GET_PARAMETERS, data, &reply);
         return reply.readString8();
     }
+    virtual status_t sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
+    {
+        LOGD("sendCommand");
+        Parcel data, reply;
+        data.writeInterfaceToken(ICamera::getInterfaceDescriptor());
+        data.writeInt32(cmd);
+        data.writeInt32(arg1);
+        data.writeInt32(arg2);
+        remote()->transact(SEND_COMMAND, data, &reply);
+        return reply.readInt32();
+    }
     virtual status_t connect(const sp<ICameraClient>& cameraClient)
     {
         Parcel data, reply;
@@ -331,6 +343,15 @@
              reply->writeString8(getParameters());
             return NO_ERROR;
          } break;
+        case SEND_COMMAND: {
+            LOGD("SEND_COMMAND");
+            CHECK_INTERFACE(ICamera, data, reply);
+            int command = data.readInt32();
+            int arg1 = data.readInt32();
+            int arg2 = data.readInt32();
+            reply->writeInt32(sendCommand(command, arg1, arg2));
+            return NO_ERROR;
+         } break;
         case CONNECT: {
             CHECK_INTERFACE(ICamera, data, reply);
             sp<ICameraClient> cameraClient = interface_cast<ICameraClient>(data.readStrongBinder());