diff --git a/include/ui/CameraHardwareInterface.h b/include/ui/CameraHardwareInterface.h
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+++ b/include/ui/CameraHardwareInterface.h
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+/*
+ * Copyright (C) 2008 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_HARDWARE_CAMERA_HARDWARE_INTERFACE_H
+#define ANDROID_HARDWARE_CAMERA_HARDWARE_INTERFACE_H
+
+#include <utils/IMemory.h>
+#include <utils/RefBase.h>
+#include <ui/CameraParameters.h>
+
+namespace android {
+
+/** Callback for startPreview() */
+typedef void (*preview_callback)(const sp<IMemory>& mem, void* user);
+
+/** Callback for takePicture() */
+typedef void (*shutter_callback)(void* user);
+
+/** Callback for takePicture() */
+typedef void (*raw_callback)(const sp<IMemory>& mem, void* user);
+
+/** Callback for takePicture() */
+typedef void (*jpeg_callback)(const sp<IMemory>& mem, void* user);
+
+/** Callback for autoFocus() */
+typedef void (*autofocus_callback)(bool focused, void* user);
+
+/**
+ * This defines the interface to the camera hardware abstraction
+ * layer. It supports setting and getting parameters, live
+ * previewing and taking pictures. It is a referenced counted
+ * interface with RefBase as its base class.
+ *
+ * The openCameraHardware function is used to
+ * retrieve a strong pointer to the instance of this interface
+ * and may be called multiple times.
+ *
+ * After calling openCameraHardware the getParameters and
+ * setParameters are used to initialize the camera instance.
+ *
+ * Then getPreviewHeap is called to get access to the preview
+ * heap so it can be registered with the SurfaceFlinger for efficient
+ * display updating while in the preview mode.
+ *
+ * Next startPreview is called which is passed a preview_callback
+ * function and a user parameter. The camera instance then
+ * periodically calls preview_callback each time a new
+ * preview frame is available. The call back routine has
+ * two parameters, the first is a pointer to the the IMemory containing
+ * the frame and the other is the user parameter. If the preview_callback
+ * code needs to use this memory after returning it must copy
+ * the data.
+ *
+ * Prior to taking a picture the autoFocus method is usually called with a
+ * autofocus_callback and a user parameter. When auto focusing
+ * has completed the camera instance calls autofocus_callback which
+ * informs the application if focusing was successful or not.
+ * The camera instance only calls the autofocus_callback once and it
+ * is up to the application to call autoFocus again if refocusing is desired.
+ *
+ * The method takePicture is called to request that the camera instance take a
+ * picture. This method has three callbacks: shutter_callback, raw_callback,
+ * and jpeg_callback. As soon as the shutter snaps and it is safe to move the
+ * camera, shutter_callback is called.  Typically, you would want to play the
+ * shutter sound at this moment. Later, when the raw image is available the
+ * raw_callback is called with a pointer to the IMemory containing the raw
+ * image.  Finally, when the encoded jpeg image is available the jpeg_callback
+ * will be called with a pointer to the IMemory containing the jpeg image.  As
+ * with the preview_callback the memory must be copied if it's needed after
+ * returning.
+ */
+class CameraHardwareInterface : public virtual RefBase {
+public:
+    virtual ~CameraHardwareInterface() { }
+
+    /** Return the IMemoryHeap for the preview image heap */
+    virtual sp<IMemoryHeap>         getPreviewHeap() const = 0;
+
+    /**
+     * Start preview mode. When a preview image is available
+     * preview_callback is called with the user parameter. The
+     * call back parameter may be null.
+     */
+    virtual status_t    startPreview(preview_callback cb, void* user) = 0;
+
+    /**
+     * Stop a previously started preview.
+     */
+    virtual void        stopPreview() = 0;
+
+    /**
+     * Start auto focus, the callback routine is called
+     * once when focusing is complete. autoFocus() will
+     * be called agained if another auto focus is needed.
+     */
+    virtual status_t    autoFocus(autofocus_callback,
+                                  void* user) = 0;
+
+    /**
+     * Take a picture. The raw_callback is called when
+     * the uncompressed image is available. The jpeg_callback
+     * is called when the compressed image is available. These
+     * call backs may be null. The user parameter is passed
+     * to each of the call back routines.
+     */
+    virtual status_t    takePicture(shutter_callback,
+                                    raw_callback,
+                                    jpeg_callback,
+                                    void* user) = 0;
+
+    /**
+     * Cancel a picture that was started with takePicture.  You may cancel any
+     * of the shutter, raw, or jpeg callbacks.  Calling this method when no
+     * picture is being taken is a no-op.
+     */
+    virtual status_t    cancelPicture(bool cancel_shutter,
+                                      bool cancel_raw,
+                                      bool cancel_jpeg) = 0;
+
+    /** Set the camera parameters. */
+    virtual status_t    setParameters(const CameraParameters& params) = 0;
+
+    /** Return the camera parameters. */
+    virtual CameraParameters  getParameters() const = 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
+     */
+    virtual status_t dump(int fd, const Vector<String16>& args) const = 0;
+};
+
+/** factory function to instantiate a camera hardware object */
+extern "C" sp<CameraHardwareInterface> openCameraHardware();
+
+};  // namespace android
+
+#endif