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Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html. ** ** ** $QT_END_LICENSE$ ** ****************************************************************************/ #include "qdeclarativecamera_p.h" #include "qdeclarativecamerapreviewprovider_p.h" #include "qdeclarativecameraexposure_p.h" #include "qdeclarativecameraflash_p.h" #include "qdeclarativecamerafocus_p.h" #include "qdeclarativecameraimageprocessing_p.h" #include #include #include #include #include #include QT_BEGIN_NAMESPACE void QDeclarativeCamera::_q_error(QCamera::Error errorCode) { emit error(Error(errorCode), errorString()); emit errorChanged(); } void QDeclarativeCamera::_q_updateState(QCamera::State state) { emit cameraStateChanged(QDeclarativeCamera::State(state)); } void QDeclarativeCamera::_q_availabilityChanged(QMultimedia::AvailabilityStatus availability) { emit availabilityChanged(Availability(availability)); } /*! \qmltype Camera \instantiates QDeclarativeCamera \brief Access viewfinder frames, and take photos and movies. \ingroup multimedia_qml \ingroup camera_qml \inqmlmodule QtMultimedia 5.0 \inherits Item Camera is part of the \b{QtMultimedia 5.0} module. You can use \c Camera to capture images and movies from a camera, and manipulate the capture and processing settings that get applied to the images. To display the viewfinder you can use \l VideoOutput with the Camera set as the source. \qml import QtQuick 2.0 import QtMultimedia 5.0 Item { width: 640 height: 360 Camera { id: camera imageProcessing.whiteBalanceMode: CameraImageProcessing.WhiteBalanceFlash exposure { exposureCompensation: -1.0 exposureMode: Camera.ExposurePortrait } flash.mode: Camera.FlashRedEyeReduction imageCapture { onImageCaptured: { photoPreview.source = preview // Show the preview in an Image } } } VideoOutput { source: camera anchors.fill: parent focus : visible // to receive focus and capture key events when visible } Image { id: photoPreview } } \endqml The various settings and functionality of the Camera stack is spread across a few different child properties of Camera. \table \header \li Property \li Description \row \li \l {CameraCapture} {imageCapture} \li Methods and properties for capturing still images. \row \li \l {CameraRecorder} {videoRecording} \li Methods and properties for capturing movies. \row \li \l {CameraExposure} {exposure} \li Methods and properties for adjusting exposure (aperture, shutter speed etc). \row \li \l {CameraFocus} {focus} \li Methods and properties for adjusting focus and providing feedback on autofocus progress. \row \li \l {CameraFlash} {flash} \li Methods and properties for controlling the camera flash. \row \li \l {CameraImageProcessing} {imageProcessing} \li Methods and properties for adjusting camera image processing parameters. \endtable Basic camera state management, error reporting, and simple zoom properties are available in the Camera itself. For integration with C++ code, the \l mediaObject property allows you to access the standard QtMultimedia camera controls. Many of the camera settings may take some time to apply, and might be limited to certain supported values depending on the hardware. Some camera settings may be set manually or automatically. These settings properties contain the current set value. For example, when autofocus is enabled the focus zones are exposed in the \l {CameraFocus}{focus} property. */ /*! \class QDeclarativeCamera \internal \brief The QDeclarativeCamera class provides a camera item that you can add to a QQuickView. */ /*! Construct a declarative camera object using \a parent object. */ QDeclarativeCamera::QDeclarativeCamera(QObject *parent) : QObject(parent), m_camera(0), m_pendingState(ActiveState), m_componentComplete(false) { m_camera = new QCamera(this); m_imageCapture = new QDeclarativeCameraCapture(m_camera, this); m_videoRecorder = new QDeclarativeCameraRecorder(m_camera, this); m_exposure = new QDeclarativeCameraExposure(m_camera, this); m_flash = new QDeclarativeCameraFlash(m_camera, this); m_focus = new QDeclarativeCameraFocus(m_camera, this); m_imageProcessing = new QDeclarativeCameraImageProcessing(m_camera, this); connect(m_camera, SIGNAL(captureModeChanged(QCamera::CaptureModes)), this, SIGNAL(captureModeChanged())); connect(m_camera, SIGNAL(lockStatusChanged(QCamera::LockStatus,QCamera::LockChangeReason)), this, SIGNAL(lockStatusChanged())); connect(m_camera, SIGNAL(stateChanged(QCamera::State)), this, SLOT(_q_updateState(QCamera::State))); connect(m_camera, SIGNAL(statusChanged(QCamera::Status)), this, SIGNAL(cameraStatusChanged())); connect(m_camera, SIGNAL(error(QCamera::Error)), this, SLOT(_q_error(QCamera::Error))); connect(m_camera, SIGNAL(availabilityChanged(QMultimedia::AvailabilityStatus)), this, SLOT(_q_availabilityChanged(QMultimedia::AvailabilityStatus))); connect(m_camera->focus(), SIGNAL(opticalZoomChanged(qreal)), this, SIGNAL(opticalZoomChanged(qreal))); connect(m_camera->focus(), SIGNAL(digitalZoomChanged(qreal)), this, SIGNAL(digitalZoomChanged(qreal))); connect(m_camera->focus(), SIGNAL(maximumOpticalZoomChanged(qreal)), this, SIGNAL(maximumOpticalZoomChanged(qreal))); connect(m_camera->focus(), SIGNAL(maximumDigitalZoomChanged(qreal)), this, SIGNAL(maximumDigitalZoomChanged(qreal))); } /*! Destructor, clean up memory */ QDeclarativeCamera::~QDeclarativeCamera() { m_camera->unload(); } void QDeclarativeCamera::classBegin() { } void QDeclarativeCamera::componentComplete() { m_componentComplete = true; setCameraState(m_pendingState); } /*! Returns any camera error. \sa QDeclarativeCameraError::Error */ QDeclarativeCamera::Error QDeclarativeCamera::errorCode() const { return QDeclarativeCamera::Error(m_camera->error()); } /*! \qmlproperty string QtMultimedia5::Camera::errorString This property holds the last error string, if any. \sa QtMultimedia5::Camera::onError */ QString QDeclarativeCamera::errorString() const { return m_camera->errorString(); } /*! \qmlproperty enumeration QtMultimedia5::Camera::availability This property holds the availability state of the camera. The availability states can be one of the following: \table \header \li Value \li Description \row \li Available \li The camera is available to use \row \li Busy \li The camera is busy at the moment as it is being used by another process. \row \li Unavailable \li The camera is not available to use (there may be no camera hardware) \row \li ResourceMissing \li The camera cannot be used because of missing resources. It may be possible to try again at a later time. \endtable */ QDeclarativeCamera::Availability QDeclarativeCamera::availability() const { return Availability(m_camera->availability()); } /*! \qmlproperty enumeration QtMultimedia5::Camera::captureMode This property holds the camera capture mode, which can be one of the following: \table \header \li Value \li Description \row \li CaptureViewfinder \li Camera is only configured to display viewfinder. \row \li CaptureStillImage \li Prepares the Camera for capturing still images. \row \li CaptureVideo \li Prepares the Camera for capturing video. \endtable */ QDeclarativeCamera::CaptureMode QDeclarativeCamera::captureMode() const { return QDeclarativeCamera::CaptureMode(int(m_camera->captureMode())); } void QDeclarativeCamera::setCaptureMode(QDeclarativeCamera::CaptureMode mode) { m_camera->setCaptureMode(QCamera::CaptureModes(int(mode))); } /*! \qmlproperty enumeration QtMultimedia5::Camera::cameraState This property holds the camera object's current state, which can be one of the following: \table \header \li Value \li Description \row \li UnloadedState \li The initial camera state, with the camera not loaded. The camera capabilities (with the exception of supported capture modes) are unknown. This state saves the most power, but takes the longest time to be ready for capture. While the supported settings are unknown in this state, you can still set the camera capture settings like codec, resolution, or frame rate. \row \li LoadedState \li The camera is loaded and ready to be configured. In the Idle state you can query camera capabilities, set capture resolution, codecs, and so on. The viewfinder is not active in the loaded state. \row \li ActiveState \li In the active state the viewfinder frames are available and the camera is ready for capture. \endtable The default camera state is ActiveState. */ QDeclarativeCamera::State QDeclarativeCamera::cameraState() const { return m_componentComplete ? QDeclarativeCamera::State(m_camera->state()) : m_pendingState; } /*! \qmlproperty enumeration QtMultimedia5::Camera::cameraStatus This property holds the camera object's current status, which can be one of the following: \table \header \li Value \li Description \row \li ActiveStatus \li The camera has been started and can produce data, viewfinder displays video frames. Depending on backend, changing camera settings such as capture mode, codecs, or resolution in ActiveState may lead to changing the status to LoadedStatus and StartingStatus while the settings are applied, and back to ActiveStatus when the camera is ready. \row \li StartingStatus \li The camera is starting as a result of state transition to Camera.ActiveState. The camera service is not ready to capture yet. \row \li StoppingStatus \li The camera is stopping as a result of state transition from Camera.ActiveState to Camera.LoadedState or Camera.UnloadedState. \row \li StandbyStatus \li The camera is in the power saving standby mode. The camera may enter standby mode after some time of inactivity in the Camera.LoadedState state. \row \li LoadedStatus \li The camera is loaded and ready to be configured. This status indicates the camera device is opened and it's possible to query for supported image and video capture settings such as resolution, frame rate, and codecs. \row \li LoadingStatus \li The camera device loading as a result of state transition from Camera.UnloadedState to Camera.LoadedState or Camera.ActiveState. \row \li UnloadingStatus \li The camera device is unloading as a result of state transition from Camera.LoadedState or Camera.ActiveState to Camera.UnloadedState. \row \li UnloadedStatus \li The initial camera status, with camera not loaded. The camera capabilities including supported capture settings may be unknown. \row \li UnavailableStatus \li The camera or camera backend is not available. \endtable */ QDeclarativeCamera::Status QDeclarativeCamera::cameraStatus() const { return QDeclarativeCamera::Status(m_camera->status()); } void QDeclarativeCamera::setCameraState(QDeclarativeCamera::State state) { if (!m_componentComplete) { m_pendingState = state; return; } switch (state) { case QDeclarativeCamera::ActiveState: m_camera->start(); break; case QDeclarativeCamera::UnloadedState: m_camera->unload(); break; case QDeclarativeCamera::LoadedState: m_camera->load(); break; } } /*! \qmlmethod QtMultimedia5::Camera::start() Starts the camera. Viewfinder frames will be available and image or movie capture will be possible. */ void QDeclarativeCamera::start() { setCameraState(QDeclarativeCamera::ActiveState); } /*! \qmlmethod QtMultimedia5::Camera::stop() Stops the camera, but leaves the camera stack loaded. */ void QDeclarativeCamera::stop() { setCameraState(QDeclarativeCamera::LoadedState); } /*! \qmlproperty enumeration QtMultimedia5::Camera::lockStatus This property holds the status of all the requested camera locks. The status can be one of the following values: \table \header \li Value \li Description \row \li Unlocked \li The application is not interested in camera settings value. The camera may keep this parameter without changes, which is common with camera focus, or adjust exposure and white balance constantly to keep the viewfinder image nice. \row \li Searching \li The application has requested the camera focus, exposure, or white balance lock with searchAndLock(). This state indicates the camera is focusing or calculating exposure and white balance. \row \li Locked \li The camera focus, exposure, or white balance is locked. The camera is ready to capture, and the application may check the exposure parameters. The locked state usually means the requested parameter stays the same, except in cases where the parameter is requested to be updated constantly. For example in continuous focusing mode, the focus is considered locked as long as the object is in focus, even while the actual focusing distance may be constantly changing. \endtable */ /*! \property QDeclarativeCamera::lockStatus This property holds the status of all the requested camera locks. The status can be one of the following: \table \header \li Value \li Description \row \li Unlocked \li The application is not interested in camera settings value. The camera may keep this parameter without changes, this is common with camera focus, or adjust exposure and white balance constantly to keep the viewfinder image nice. \row \li Searching \li The application has requested the camera focus, exposure or white balance lock with searchAndLock(). This state indicates the camera is focusing or calculating exposure and white balance. \row \li Locked \li The camera focus, exposure or white balance is locked. The camera is ready to capture, and the application may check the exposure parameters. The locked state usually means the requested parameter stays the same, except in the cases when the parameter is requested to be updated constantly. For example in continuous focusing mode, the focus is considered locked as long and the object is in focus, even while the actual focusing distance may be constantly changing. \endtable */ QDeclarativeCamera::LockStatus QDeclarativeCamera::lockStatus() const { return QDeclarativeCamera::LockStatus(m_camera->lockStatus()); } /*! \qmlmethod QtMultimedia5::Camera::searchAndLock() Start focusing, exposure and white balance calculation. This is appropriate to call when the camera focus button is pressed (or on a camera capture button half-press). If the camera supports autofocusing, information on the focus zones is available through the \l {CameraFocus}{focus} property. */ void QDeclarativeCamera::searchAndLock() { m_camera->searchAndLock(); } /*! \qmlmethod QtMultimedia5::Camera::unlock() Unlock focus, exposure and white balance locks. */ void QDeclarativeCamera::unlock() { m_camera->unlock(); } /*! \property QDeclarativeCamera::maximumOpticalZoom This property holds the maximum optical zoom factor supported, or 1.0 if optical zoom is not supported. */ /*! \qmlproperty real QtMultimedia5::Camera::maximumOpticalZoom This property holds the maximum optical zoom factor supported, or 1.0 if optical zoom is not supported. */ qreal QDeclarativeCamera::maximumOpticalZoom() const { return m_camera->focus()->maximumOpticalZoom(); } /*! \property QDeclarativeCamera::maximumDigitalZoom This property holds the maximum digital zoom factor supported, or 1.0 if digital zoom is not supported. */ /*! \qmlproperty real QtMultimedia5::Camera::maximumDigitalZoom This property holds the maximum digital zoom factor supported, or 1.0 if digital zoom is not supported. */ qreal QDeclarativeCamera::maximumDigitalZoom() const { return m_camera->focus()->maximumDigitalZoom(); } /*! \property QDeclarativeCamera::opticalZoom This property holds the current optical zoom factor. */ /*! \qmlproperty real QtMultimedia5::Camera::opticalZoom This property holds the current optical zoom factor. */ qreal QDeclarativeCamera::opticalZoom() const { return m_camera->focus()->opticalZoom(); } void QDeclarativeCamera::setOpticalZoom(qreal value) { m_camera->focus()->zoomTo(value, digitalZoom()); } /*! \property QDeclarativeCamera::digitalZoom This property holds the current digital zoom factor. */ /*! \qmlproperty real QtMultimedia5::Camera::digitalZoom This property holds the current digital zoom factor. */ qreal QDeclarativeCamera::digitalZoom() const { return m_camera->focus()->digitalZoom(); } void QDeclarativeCamera::setDigitalZoom(qreal value) { m_camera->focus()->zoomTo(opticalZoom(), value); } /*! \qmlproperty variant QtMultimedia5::Camera::mediaObject This property holds the media object for the camera. */ /*! \qmlproperty enumeration QtMultimedia5::Camera::errorCode This property holds the last error code. \sa QtMultimedia5::Camera::onError */ /*! \qmlsignal QtMultimedia5::Camera::onError(errorCode, errorString) This handler is called when an error occurs. The enumeration value \a errorCode is one of the values defined below, and a descriptive string value is available in \a errorString. \table \header \li Value \li Description \row \li NoError \li No errors have occurred. \row \li CameraError \li An error has occurred. \row \li InvalidRequestError \li System resource doesn't support requested functionality. \row \li ServiceMissingError \li No camera service available. \row \li NotSupportedFeatureError \li The feature is not supported. \endtable */ /*! \qmlsignal Camera::lockStatusChanged() This signal is emitted when the lock status (focus, exposure etc) changes. This can happen when locking (e.g. autofocusing) is complete or has failed. */ /*! \qmlsignal Camera::stateChanged(state) This signal is emitted when the camera state has changed to \a state. Since the state changes may take some time to occur this signal may arrive sometime after the state change has been requested. */ /*! \fn void QDeclarativeCamera::opticalZoomChanged(qreal zoom) \qmlsignal Camera::opticalZoomChanged(zoom) The optical zoom setting has changed to \a zoom. */ /*! \fn void QDeclarativeCamera::digitalZoomChanged(qreal zoom) \qmlsignal Camera::digitalZoomChanged(zoom) The digital zoom setting has changed to \a zoom. */ /*! \fn void QDeclarativeCamera::maximumOpticalZoomChanged(qreal zoom) \qmlsignal Camera::maximumOpticalZoomChanged(zoom) The maximum optical zoom setting has changed to \a zoom. This can occur when you change between video and still image capture modes, or the capture settings are changed. */ /*! \fn void QDeclarativeCamera::maximumDigitalZoomChanged(qreal zoom) \qmlsignal Camera::maximumDigitalZoomChanged(zoom) The maximum digital zoom setting has changed to \a zoom. This can occur when you change between video and still image capture modes, or the capture settings are changed. */ QT_END_NAMESPACE #include "moc_qdeclarativecamera_p.cpp"