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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 S60CAMERAVIEWFINDERENGINE_H
#define S60CAMERAVIEWFINDERENGINE_H
#include <QtCore/qsize.h>
#include <QtGui/qpixmap.h>
#include <qvideosurfaceformat.h>
#include "s60cameraengineobserver.h"
class CCameraEngine;
class S60CameraControl;
class QAbstractVideoSurface;
// For DirectScreen ViewFinder
class RWsSession;
class CWsScreenDevice;
class RWindowBase;
class RWindow;
class QDesktopWidget;
class S60VideoDisplay;
/*
* Class implementing video output selection for the viewfinder and the handler of
* all common viewfinder operations.
*/
class S60CameraViewfinderEngine : public QObject, public MCameraViewfinderObserver
{
Q_OBJECT
public: // Enums
/*
* Defines whether viewfinder output backend control is of type
* QVideoWidgetControl, QVideoRendererControl or QVideoWindowControl
*/
enum ViewfinderOutputType {
OutputTypeNotSet = 0, // No viewfinder output connected
OutputTypeVideoWidget, // Using QVideoWidget
OutputTypeRenderer, // (Using QGraphicsVideoItem with) QVideoRendererControl
OutputTypeVideoWindow // Using QGraphicsVideoItem with QVideoWindow
};
public: // Constructor & Destructor
S60CameraViewfinderEngine(S60CameraControl *control,
CCameraEngine *engine,
QObject *parent = 0);
~S60CameraViewfinderEngine();
public: // Methods
// Setting Viewfinder Output
void setVideoWidgetControl(QObject *viewfinderOutput);
void setVideoRendererControl(QObject *viewfinderOutput);
void setVideoWindowControl(QObject *viewfinderOutput);
void releaseControl(ViewfinderOutputType type);
// Controls
void startViewfinder(const bool internalStart = false);
void stopViewfinder(const bool internalStop = false);
// Start using new CameraEngine
void setNewCameraEngine(CCameraEngine *engine);
protected: // MCameraViewfinderObserver
void MceoViewFinderFrameReady(CFbsBitmap& aFrame);
private: // Internal operation
void checkAndRotateCamera();
signals:
void error(int error, const QString &errorString);
void viewFinderFrameReady(const CFbsBitmap &bitmap);
private slots:
void resetViewfinderSize(const QSize size);
void resetVideoWindowSize();
void resetViewfinderDisplay();
void viewFinderBitmapReady(const CFbsBitmap &bitmap);
void handleVisibilityChange(const bool isVisible);
void handleWindowChange(RWindow *handle);
void handleDesktopResize(int screen);
void handleContentAspectRatioChange(const QSize& newSize);
void rendererSurfaceSet();
private: // Enums
/*
* Defines the internal state of the viewfinder. ViewFinder will only be
* started if output is connected to Camera and Camera is started (and
* ViewFinder widget is visible in case of QVideoWidget).
*/
enum ViewFinderState {
EVFNotConnectedNotStarted = 0, // 0 - No output connected, viewfinder is not started
EVFNotConnectedIsStarted, // 1 - No output connected, viewfinder is started
EVFIsConnectedNotStarted, // 2 - Output is connected, viewfinder is not started
EVFIsConnectedIsStartedNotVisible, // 3 - Output is connected, viewfinder is started but is not visible
EVFIsConnectedIsStartedIsVisible // 4 - Output is connected, viewfinder is started and is visible
};
/*
* The native type of ViewFinder. DirectScreen ViewFinder is used with
* QVideoWidget if support for it is available in the platform. For
* QGraphicsVideoItem Bitmap ViewFinder is always used.
*/
enum NativeViewFinderType {
EBitmapViewFinder = 0,
EDirectScreenViewFinder
};
private: // Data
CCameraEngine *m_cameraEngine;
S60CameraControl *m_cameraControl;
QObject *m_viewfinderOutput;
S60VideoDisplay *m_viewfinderDisplay;
QAbstractVideoSurface *m_viewfinderSurface; // Used only by QVideoRendererControl
RWsSession &m_wsSession;
CWsScreenDevice &m_screenDevice;
RWindowBase *m_window;
QDesktopWidget *m_desktopWidget;
ViewFinderState m_vfState;
QSize m_viewfinderSize;
// Actual viewfinder size, which may differ from requested
// (m_viewfinderSize), if the size/aspect ratio was not supported.
QSize m_actualViewFinderSize;
qreal m_viewfinderAspectRatio;
ViewfinderOutputType m_viewfinderType;
NativeViewFinderType m_viewfinderNativeType;
QVideoSurfaceFormat m_surfaceFormat; // Used only by QVideoRendererControl
bool m_isViewFinderVisible;
bool m_uiLandscape; // For detecting UI rotation
int m_vfErrorsSignalled;
};
#endif // S60CAMERAVIEWFINDERENGINE_H
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