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diff --git a/src/plugins/symbian/ecam/s60cameraengineobserver.h b/src/plugins/symbian/ecam/s60cameraengineobserver.h
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+/****************************************************************************
+ **
+ ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+ ** All rights reserved.
+ ** Contact: Nokia Corporation (qt-info@nokia.com)
+ **
+ ** This file is part of the Qt Mobility Components.
+ **
+ ** $QT_BEGIN_LICENSE:LGPL$
+ ** No Commercial Usage
+ ** This file contains pre-release code and may not be distributed.
+ ** You may use this file in accordance with the terms and conditions
+ ** contained in the Technology Preview License Agreement accompanying
+ ** this package.
+ **
+ ** GNU Lesser General Public License Usage
+ ** Alternatively, this file may be used under the terms of the GNU Lesser
+ ** General Public License version 2.1 as published by the Free Software
+ ** Foundation and appearing in the file LICENSE.LGPL included in the
+ ** packaging of this file.  Please review the following information to
+ ** ensure the GNU Lesser General Public License version 2.1 requirements
+ ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+ **
+ ** In addition, as a special exception, Nokia gives you certain additional
+ ** rights.  These rights are described in the Nokia Qt LGPL Exception
+ ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+ **
+ ** If you have questions regarding the use of this file, please contact
+ ** Nokia at qt-info@nokia.com.
+ **
+ **
+ **
+ **
+ **
+ **
+ **
+ **
+ ** $QT_END_LICENSE$
+ **
+ ****************************************************************************/
+#ifndef S60CCAMERAENGINEOBSERVER_H
+#define S60CCAMERAENGINEOBSERVER_H
+
+// FORWARD DECLARATIONS
+class CFbsBitmap;
+class TECAMEvent;
+
+enum TCameraEngineError
+{
+    EErrReserve,
+    EErrPowerOn,
+    EErrViewFinderReady,
+    EErrImageReady,
+    EErrPreview,
+    EErrAutoFocusInit,
+    EErrAutoFocusMode,
+    EErrAutoFocusArea,
+    EErrAutoFocusRange,
+    EErrAutoFocusType,
+    EErrOptimisedFocusComplete,
+};
+
+/*
+ * CameraEngine Observer class towards Camera AdvancedSettings
+ */
+class MAdvancedSettingsObserver
+{
+public:
+
+    virtual void HandleAdvancedEvent( const TECAMEvent &aEvent ) = 0;
+
+};
+
+//=============================================================================
+
+/*
+ * CameraEngine Observer class towards Camera Control
+ */
+class MCameraEngineObserver
+{
+public:
+
+    /**
+     * Camera is ready to use for capturing images.
+     */
+    virtual void MceoCameraReady() = 0;
+
+    /**
+     * Notifies clients about errors in camera engine
+     * @param aErrorType type of error (see TCameraEngineError)
+     * @param aError Symbian system-wide error code
+     */
+    virtual void MceoHandleError( TCameraEngineError aErrorType, TInt aError ) = 0;
+
+};
+
+//=============================================================================
+
+/*
+ * CameraEngine Observer class towards Camera ImageCaptureSession
+ */
+class MCameraEngineImageCaptureObserver
+{
+public:
+
+    /**
+     * Camera AF lens has attained optimal focus
+     */
+    virtual void MceoFocusComplete() = 0;
+
+    /**
+     * Captured data is ready - call CCameraEngine::ReleaseImageBuffer()
+     * after processing/saving the data (typically, JPG-encoded image)
+     * @param aData Pointer to a descriptor containing a frame of camera data.
+     */
+    virtual void MceoCapturedDataReady( TDesC8* aData ) = 0;
+
+    /**
+     * Captured bitmap is ready.
+     * after processing/saving the image, call
+     * CCameraEngine::ReleaseImageBuffer() to free the bitmap.
+     * @param aBitmap Pointer to an FBS bitmap containing a captured image.
+     */
+    virtual void MceoCapturedBitmapReady( CFbsBitmap* aBitmap ) = 0;
+
+    /**
+     * Notifies clients about errors in camera engine
+     * @param aErrorType type of error (see TCameraEngineError)
+     * @param aError Symbian system-wide error code
+     */
+    virtual void MceoHandleError( TCameraEngineError aErrorType, TInt aError ) = 0;
+
+    /**
+     * Notifies client about other events not recognized by camera engine.
+     * The default implementation is empty.
+     * @param aEvent camera event (see MCameraObserver2::HandleEvent())
+     */
+    virtual void MceoHandleOtherEvent( const TECAMEvent& /*aEvent*/ ) {}
+};
+
+//=============================================================================
+
+/*
+ * CameraEngine Observer class towards Camera ViewFinderEngine
+ */
+class MCameraViewfinderObserver
+{
+public:
+    /**
+     * A new viewfinder frame is ready.
+     * after displaying the frame, call
+     * CCameraEngine::ReleaseViewFinderBuffer()
+     * to free the bitmap.
+     * @param aFrame Pointer to an FBS bitmap containing a viewfinder frame.
+     */
+    virtual void MceoViewFinderFrameReady( CFbsBitmap& aFrame ) = 0;
+};
+
+//=============================================================================
+
+#ifdef ECAM_PREVIEW_API
+/*
+ * CameraEngine Observer class towards Camera ViewFinderEngine
+ */
+class MCameraPreviewObserver
+{
+public:
+    /**
+     * A new preview is available.
+     * @param aPreview Pointer to an FBS bitmap containing a preview.
+     */
+    virtual void MceoPreviewReady( CFbsBitmap& aPreview ) = 0;
+};
+#endif // ECAM_PREVIEW_API
+
+#endif // CCAMERAENGINEOBSERVER_H
+
+// End of file