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diff --git a/services/camera/libcameraservice/ProCamera2Client.h b/services/camera/libcameraservice/ProCamera2Client.h
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+++ b/services/camera/libcameraservice/ProCamera2Client.h
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+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_SERVERS_CAMERA_PROCAMERA2CLIENT_H
+#define ANDROID_SERVERS_CAMERA_PROCAMERA2CLIENT_H
+
+#include "Camera2Device.h"
+#include "CameraService.h"
+
+namespace android {
+
+class IMemory;
+/**
+ * Implements the binder IProCameraUser API,
+ * meant for HAL2-level private API access.
+ */
+class ProCamera2Client :
+        public CameraService::ProClient,
+        public Camera2Device::NotificationListener
+{
+public:
+    /**
+     * IProCameraUser interface (see IProCameraUser for details)
+     */
+    virtual status_t      connect(const sp<IProCameraCallbacks>& callbacks);
+    virtual void          disconnect();
+
+    virtual status_t      exclusiveTryLock();
+    virtual status_t      exclusiveLock();
+    virtual status_t      exclusiveUnlock();
+
+    virtual bool          hasExclusiveLock();
+
+    // Note that the callee gets a copy of the metadata.
+    virtual int           submitRequest(camera_metadata_t* metadata,
+                                        bool streaming = false);
+    virtual status_t      cancelRequest(int requestId);
+
+    virtual status_t      requestStream(int streamId);
+    virtual status_t      cancelStream(int streamId);
+
+    virtual status_t      createStream(int width, int height, int format,
+                                       const sp<Surface>& surface,
+                                       /*out*/
+                                       int* streamId);
+
+    // Create a request object from a template.
+    virtual status_t      createDefaultRequest(int templateId,
+                                               /*out*/
+                                               camera_metadata** request);
+
+
+    /**
+     * Interface used by CameraService
+     */
+
+    ProCamera2Client(const sp<CameraService>& cameraService,
+            const sp<IProCameraCallbacks>& remoteCallback,
+            int cameraId,
+            int cameraFacing,
+            int clientPid,
+            int servicePid);
+    virtual ~ProCamera2Client();
+
+    status_t initialize(camera_module_t *module);
+
+    virtual status_t dump(int fd, const Vector<String16>& args);
+
+    /**
+     * Interface used by Camera2Device
+     */
+
+    virtual void notifyError(int errorCode, int arg1, int arg2);
+    virtual void notifyShutter(int frameNumber, nsecs_t timestamp);
+    virtual void notifyAutoFocus(uint8_t newState, int triggerId);
+    virtual void notifyAutoExposure(uint8_t newState, int triggerId);
+    virtual void notifyAutoWhitebalance(uint8_t newState, int triggerId);
+
+
+    int getCameraId() const;
+    const sp<Camera2Device>& getCameraDevice();
+    const sp<CameraService>& getCameraService();
+
+    /**
+     * Interface used by independent components of ProCamera2Client.
+     */
+
+    // Simple class to ensure that access to IProCameraCallbacks is serialized
+    // by requiring mRemoteCallbackLock to be locked before access to
+    // mCameraClient is possible.
+    class SharedCameraCallbacks {
+      public:
+        class Lock {
+          public:
+            Lock(SharedCameraCallbacks &client);
+            ~Lock();
+            sp<IProCameraCallbacks> &mRemoteCallback;
+          private:
+            SharedCameraCallbacks &mSharedClient;
+        };
+        SharedCameraCallbacks(const sp<IProCameraCallbacks>& client);
+        SharedCameraCallbacks& operator=(const sp<IProCameraCallbacks>& client);
+        void clear();
+      private:
+        sp<IProCameraCallbacks> mRemoteCallback;
+        mutable Mutex mRemoteCallbackLock;
+    } mSharedCameraCallbacks;
+
+private:
+    /** IProCameraUser interface-related private members */
+
+    // Mutex that must be locked by methods implementing the IProCameraUser
+    // interface. Ensures serialization between incoming IProCameraUser calls.
+    // All methods below that append 'L' to the name assume that
+    // mIProCameraUserLock is locked when they're called
+    mutable Mutex mIProCameraUserLock;
+
+    // Used with stream IDs
+    static const int NO_STREAM = -1;
+
+    /* Preview/Recording related members */
+
+    sp<IBinder> mPreviewSurface;
+
+    /** Preview callback related members */
+    /** Camera2Device instance wrapping HAL2 entry */
+
+    sp<Camera2Device> mDevice;
+
+    /** Utility members */
+
+    // Verify that caller is the owner of the camera
+    status_t checkPid(const char *checkLocation) const;
+
+    // Whether or not we have an exclusive lock on the device
+    // - if no we can't modify the request queue.
+    // note that creating/deleting streams we own is still OK
+    bool mExclusiveLock;
+};
+
+}; // namespace android
+
+#endif