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diff --git a/modules/usbcamera/CameraHAL.h b/modules/usbcamera/CameraHAL.h
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+++ b/modules/usbcamera/CameraHAL.h
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+/*
+ * Copyright (C) 2015 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 CAMERA_HAL_H_
+#define CAMERA_HAL_H_
+
+#include <hardware/hardware.h>
+#include <hardware/camera_common.h>
+#include <utils/Vector.h>
+#include <utils/Mutex.h>
+#include "HotplugThread.h"
+#include "Camera.h"
+
+namespace usb_camera_hal {
+
+class HotplugThread;
+
+/**
+ * CameraHAL contains all module state that isn't specific to an individual camera device
+ */
+class CameraHAL {
+    public:
+        CameraHAL();
+        ~CameraHAL();
+
+        // Camera Module Interface (see <hardware/camera_common.h>)
+        int getNumberOfCameras();
+        int getCameraInfo(int camera_id, struct camera_info *info);
+        int setCallbacks(const camera_module_callbacks_t *callbacks);
+        void getVendorTagOps(vendor_tag_ops_t* ops);
+
+        // Hardware Module Interface (see <hardware/hardware.h>)
+        int open(const hw_module_t* mod, const char* name, hw_device_t** dev);
+
+    private:
+        // Callback handle
+        const camera_module_callbacks_t *mCallbacks;
+        android::Vector<Camera*> mCameras;
+        // Lock to protect the module method calls.
+        android::Mutex mModuleLock;
+        // Hot plug thread managing camera hot plug.
+        HotplugThread *mHotplugThread;
+
+};
+} // namespace usb_camera_hal
+
+#endif // CAMERA_HAL_H_