1108 lines
35 KiB
C++
1108 lines
35 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://www.qt.io/licensing/
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**
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** This file is part of the plugins of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL21$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see http://www.qt.io/terms-conditions. For further
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** information use the contact form at http://www.qt.io/contact-us.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 or version 3 as published by the Free
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** Software Foundation and appearing in the file LICENSE.LGPLv21 and
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** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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** following information to ensure the GNU Lesser General Public License
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** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** As a special exception, The Qt Company gives you certain additional
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** rights. These rights are described in The Qt Company LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qdeclarativecamera_p.h"
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#include "qdeclarativecamerapreviewprovider_p.h"
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#include "qdeclarativecameraexposure_p.h"
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#include "qdeclarativecameraflash_p.h"
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#include "qdeclarativecamerafocus_p.h"
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#include "qdeclarativecameraimageprocessing_p.h"
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#include "qdeclarativecameraviewfinder_p.h"
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#include "qdeclarativemediametadata_p.h"
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#include <qmediaplayercontrol.h>
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#include <qmediaservice.h>
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#include <qvideorenderercontrol.h>
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#include <qvideodeviceselectorcontrol.h>
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#include <QtQml/qqmlinfo.h>
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#include <QtCore/QTimer>
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#include <QtGui/qevent.h>
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QT_BEGIN_NAMESPACE
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void QDeclarativeCamera::_q_error(QCamera::Error errorCode)
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{
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emit error(Error(errorCode), errorString());
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emit errorChanged();
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}
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void QDeclarativeCamera::_q_updateState(QCamera::State state)
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{
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emit cameraStateChanged(QDeclarativeCamera::State(state));
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}
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void QDeclarativeCamera::_q_availabilityChanged(QMultimedia::AvailabilityStatus availability)
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{
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emit availabilityChanged(Availability(availability));
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}
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/*!
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\qmltype Camera
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\instantiates QDeclarativeCamera
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\brief Access viewfinder frames, and take photos and movies.
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\ingroup multimedia_qml
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\ingroup camera_qml
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\inqmlmodule QtMultimedia
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\inherits QtObject
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You can use \c Camera to capture images and movies from a camera, and manipulate
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the capture and processing settings that get applied to the images. To display the
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viewfinder you can use \l VideoOutput with the Camera set as the source.
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\qml
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import QtQuick 2.0
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import QtMultimedia 5.4
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Item {
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width: 640
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height: 360
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Camera {
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id: camera
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imageProcessing.whiteBalanceMode: CameraImageProcessing.WhiteBalanceFlash
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exposure {
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exposureCompensation: -1.0
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exposureMode: Camera.ExposurePortrait
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}
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flash.mode: Camera.FlashRedEyeReduction
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imageCapture {
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onImageCaptured: {
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photoPreview.source = preview // Show the preview in an Image
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}
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}
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}
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VideoOutput {
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source: camera
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anchors.fill: parent
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focus : visible // to receive focus and capture key events when visible
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}
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Image {
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id: photoPreview
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}
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}
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\endqml
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If multiple cameras are available, you can select which one to use by setting the \l deviceId
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property to a value from
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\l{QtMultimedia::QtMultimedia::availableCameras}{QtMultimedia.availableCameras}.
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On a mobile device, you can conveniently switch between front-facing and back-facing cameras
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by setting the \l position property.
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The various settings and functionality of the Camera stack is spread
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across a few different child properties of Camera.
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\table
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\header \li Property \li Description
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\row \li \l {CameraCapture} {imageCapture}
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\li Methods and properties for capturing still images.
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\row \li \l {CameraRecorder} {videoRecording}
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\li Methods and properties for capturing movies.
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\row \li \l {CameraExposure} {exposure}
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\li Methods and properties for adjusting exposure (aperture, shutter speed etc).
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\row \li \l {CameraFocus} {focus}
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\li Methods and properties for adjusting focus and providing feedback on autofocus progress.
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\row \li \l {CameraFlash} {flash}
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\li Methods and properties for controlling the camera flash.
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\row \li \l {CameraImageProcessing} {imageProcessing}
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\li Methods and properties for adjusting camera image processing parameters.
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\endtable
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Basic camera state management, error reporting, and simple zoom properties are
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available in the Camera itself. For integration with C++ code, the
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\l mediaObject property allows you to
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access the standard Qt Multimedia camera controls.
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Many of the camera settings may take some time to apply, and might be limited
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to certain supported values depending on the hardware. Some camera settings may be
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set manually or automatically. These settings properties contain the current set value.
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For example, when autofocus is enabled the focus zones are exposed in the
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\l {CameraFocus}{focus} property.
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For additional information, read also the \l{Camera Overview}{camera overview}.
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*/
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/*!
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\class QDeclarativeCamera
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\internal
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\brief The QDeclarativeCamera class provides a camera item that you can add to a QQuickView.
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*/
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/*!
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Construct a declarative camera object using \a parent object.
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*/
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QDeclarativeCamera::QDeclarativeCamera(QObject *parent) :
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QObject(parent),
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m_camera(0),
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m_metaData(0),
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m_viewfinder(0),
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m_pendingState(ActiveState),
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m_componentComplete(false)
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{
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m_camera = new QCamera;
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m_currentCameraInfo = QCameraInfo(*m_camera);
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m_imageCapture = new QDeclarativeCameraCapture(m_camera);
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m_videoRecorder = new QDeclarativeCameraRecorder(m_camera);
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m_exposure = new QDeclarativeCameraExposure(m_camera);
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m_flash = new QDeclarativeCameraFlash(m_camera);
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m_focus = new QDeclarativeCameraFocus(m_camera);
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m_imageProcessing = new QDeclarativeCameraImageProcessing(m_camera);
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connect(m_camera, SIGNAL(captureModeChanged(QCamera::CaptureModes)),
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this, SIGNAL(captureModeChanged()));
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connect(m_camera, SIGNAL(lockStatusChanged(QCamera::LockStatus,QCamera::LockChangeReason)),
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this, SIGNAL(lockStatusChanged()));
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connect(m_camera, &QCamera::stateChanged, this, &QDeclarativeCamera::_q_updateState);
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connect(m_camera, SIGNAL(statusChanged(QCamera::Status)), this, SIGNAL(cameraStatusChanged()));
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connect(m_camera, SIGNAL(error(QCamera::Error)), this, SLOT(_q_error(QCamera::Error)));
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connect(m_camera, SIGNAL(availabilityChanged(QMultimedia::AvailabilityStatus)),
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this, SLOT(_q_availabilityChanged(QMultimedia::AvailabilityStatus)));
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connect(m_camera->focus(), &QCameraFocus::opticalZoomChanged,
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this, &QDeclarativeCamera::opticalZoomChanged);
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connect(m_camera->focus(), &QCameraFocus::digitalZoomChanged,
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this, &QDeclarativeCamera::digitalZoomChanged);
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connect(m_camera->focus(), &QCameraFocus::maximumOpticalZoomChanged,
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this, &QDeclarativeCamera::maximumOpticalZoomChanged);
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connect(m_camera->focus(), &QCameraFocus::maximumDigitalZoomChanged,
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this, &QDeclarativeCamera::maximumDigitalZoomChanged);
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}
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/*! Destructor, clean up memory */
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QDeclarativeCamera::~QDeclarativeCamera()
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{
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m_camera->unload();
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// These must be deleted before QCamera
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delete m_imageCapture;
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delete m_videoRecorder;
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delete m_exposure;
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delete m_flash;
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delete m_focus;
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delete m_imageProcessing;
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delete m_metaData;
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delete m_viewfinder;
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delete m_camera;
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}
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void QDeclarativeCamera::classBegin()
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{
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}
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void QDeclarativeCamera::componentComplete()
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{
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m_componentComplete = true;
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setCameraState(m_pendingState);
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}
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/*!
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\qmlproperty string QtMultimedia::Camera::deviceId
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This property holds the unique identifier for the camera device being used. It may not be human-readable.
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You can get all available device IDs from \l{QtMultimedia::QtMultimedia::availableCameras}{QtMultimedia.availableCameras}.
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If no value is provided or if set to an empty string, the system's default camera will be used.
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If possible, \l cameraState, \l captureMode, \l digitalZoom and other camera parameters are
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preserved when changing the camera device.
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\sa displayName, position
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\since QtMultimedia 5.4
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*/
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QString QDeclarativeCamera::deviceId() const
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{
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return m_currentCameraInfo.deviceName();
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}
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void QDeclarativeCamera::setDeviceId(const QString &name)
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{
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if (name == m_currentCameraInfo.deviceName())
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return;
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setupDevice(name);
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}
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/*!
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\qmlproperty enumeration QtMultimedia::Camera::position
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This property holds the physical position of the camera on the hardware system.
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The position can be one of the following:
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\list
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\li \c Camera.UnspecifiedPosition - the camera position is unspecified or unknown.
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\li \c Camera.BackFace - the camera is on the back face of the system hardware. For example on a
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mobile device, it means it is on the opposite side to that of the screem.
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\li \c Camera.FrontFace - the camera is on the front face of the system hardware. For example on
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a mobile device, it means it is on the same side as that of the screen. Viewfinder frames of
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front-facing cameras are mirrored horizontally, so the users can see themselves as looking
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into a mirror. Captured images or videos are not mirrored.
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\endlist
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On a mobile device it can be used to easily choose between front-facing and back-facing cameras.
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If this property is set to \c Camera.UnspecifiedPosition, the system's default camera will be
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used.
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If possible, \l cameraState, \l captureMode, \l digitalZoom and other camera parameters are
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preserved when changing the camera device.
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\sa deviceId
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\since QtMultimedia 5.4
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*/
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QDeclarativeCamera::Position QDeclarativeCamera::position() const
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{
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return QDeclarativeCamera::Position(m_currentCameraInfo.position());
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}
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void QDeclarativeCamera::setPosition(Position position)
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{
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QCamera::Position pos = QCamera::Position(position);
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if (pos == m_currentCameraInfo.position())
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return;
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QString id;
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if (pos == QCamera::UnspecifiedPosition) {
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id = QCameraInfo::defaultCamera().deviceName();
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} else {
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QList<QCameraInfo> cameras = QCameraInfo::availableCameras(pos);
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if (!cameras.isEmpty())
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id = cameras.first().deviceName();
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}
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if (!id.isEmpty())
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setupDevice(id);
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}
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/*!
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\qmlproperty string QtMultimedia::Camera::displayName
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This property holds the human-readable name of the camera.
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You can use this property to display the name of the camera in a user interface.
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\readonly
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\sa deviceId
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\since QtMultimedia 5.4
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*/
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QString QDeclarativeCamera::displayName() const
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{
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return m_currentCameraInfo.description();
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}
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/*!
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\qmlproperty int QtMultimedia::Camera::orientation
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This property holds the physical orientation of the camera sensor.
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The value is the orientation angle (clockwise, in steps of 90 degrees) of the camera sensor in
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relation to the display in its natural orientation.
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For example, suppose a mobile device which is naturally in portrait orientation. The back-facing
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camera is mounted in landscape. If the top side of the camera sensor is aligned with the right
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edge of the screen in natural orientation, \c orientation returns \c 270. If the top side of a
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front-facing camera sensor is aligned with the right edge of the screen, \c orientation
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returns \c 90.
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\readonly
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\sa VideoOutput::orientation
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\since QtMultimedia 5.4
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*/
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int QDeclarativeCamera::orientation() const
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{
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return m_currentCameraInfo.orientation();
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}
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void QDeclarativeCamera::setupDevice(const QString &deviceName)
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{
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QMediaService *service = m_camera->service();
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if (!service)
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return;
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QVideoDeviceSelectorControl *deviceControl = qobject_cast<QVideoDeviceSelectorControl*>(service->requestControl(QVideoDeviceSelectorControl_iid));
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if (!deviceControl)
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return;
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int deviceIndex = -1;
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if (deviceName.isEmpty()) {
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deviceIndex = deviceControl->defaultDevice();
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} else {
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for (int i = 0; i < deviceControl->deviceCount(); ++i) {
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if (deviceControl->deviceName(i) == deviceName) {
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deviceIndex = i;
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break;
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}
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}
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}
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if (deviceIndex == -1)
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return;
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State previousState = cameraState();
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setCameraState(UnloadedState);
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deviceControl->setSelectedDevice(deviceIndex);
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QCameraInfo oldCameraInfo = m_currentCameraInfo;
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m_currentCameraInfo = QCameraInfo(*m_camera);
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emit deviceIdChanged();
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if (oldCameraInfo.description() != m_currentCameraInfo.description())
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emit displayNameChanged();
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if (oldCameraInfo.position() != m_currentCameraInfo.position())
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emit positionChanged();
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if (oldCameraInfo.orientation() != m_currentCameraInfo.orientation())
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emit orientationChanged();
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setCameraState(previousState);
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}
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/*!
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Returns any camera error.
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\sa QDeclarativeCameraError::Error
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*/
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QDeclarativeCamera::Error QDeclarativeCamera::errorCode() const
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{
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return QDeclarativeCamera::Error(m_camera->error());
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}
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/*!
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\qmlproperty string QtMultimedia::Camera::errorString
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This property holds the last error string, if any.
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\sa error, errorCode
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*/
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QString QDeclarativeCamera::errorString() const
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{
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return m_camera->errorString();
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}
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/*!
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\qmlproperty enumeration QtMultimedia::Camera::availability
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This property holds the availability state of the camera.
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The availability states can be one of the following:
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\table
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\header \li Value \li Description
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\row \li Available
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\li The camera is available to use
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\row \li Busy
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\li The camera is busy at the moment as it is being used by another process.
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\row \li Unavailable
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\li The camera is not available to use (there may be no camera
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hardware)
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\row \li ResourceMissing
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\li The camera cannot be used because of missing resources.
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It may be possible to try again at a later time.
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\endtable
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*/
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QDeclarativeCamera::Availability QDeclarativeCamera::availability() const
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{
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return Availability(m_camera->availability());
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}
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/*!
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\qmlproperty enumeration QtMultimedia::Camera::captureMode
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This property holds the camera capture mode, which can be one of the
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following:
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\table
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\header \li Value \li Description
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\row \li CaptureViewfinder
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\li Camera is only configured to display viewfinder.
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\row \li CaptureStillImage
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\li Prepares the Camera for capturing still images.
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\row \li CaptureVideo
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\li Prepares the Camera for capturing video.
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\endtable
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The default capture mode is \c CaptureStillImage.
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*/
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QDeclarativeCamera::CaptureMode QDeclarativeCamera::captureMode() const
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{
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return QDeclarativeCamera::CaptureMode(int(m_camera->captureMode()));
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}
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void QDeclarativeCamera::setCaptureMode(QDeclarativeCamera::CaptureMode mode)
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{
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m_camera->setCaptureMode(QCamera::CaptureModes(int(mode)));
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}
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/*!
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\qmlproperty enumeration QtMultimedia::Camera::cameraState
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This property holds the camera object's current state, which can be one of the following:
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\table
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\header \li Value \li Description
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\row \li UnloadedState
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\li The initial camera state, with the camera not loaded.
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The camera capabilities (with the exception of supported capture modes)
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are unknown. This state saves the most power, but takes the longest
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time to be ready for capture.
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While the supported settings are unknown in this state,
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you can still set the camera capture settings like codec,
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resolution, or frame rate.
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\row \li LoadedState
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\li The camera is loaded and ready to be configured.
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In the Idle state you can query camera capabilities,
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set capture resolution, codecs, and so on.
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The viewfinder is not active in the loaded state.
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\row \li ActiveState
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\li In the active state the viewfinder frames are available
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and the camera is ready for capture.
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\endtable
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The default camera state is ActiveState.
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*/
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QDeclarativeCamera::State QDeclarativeCamera::cameraState() const
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{
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return m_componentComplete ? QDeclarativeCamera::State(m_camera->state()) : m_pendingState;
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}
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/*!
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\qmlproperty enumeration QtMultimedia::Camera::cameraStatus
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This property holds the camera object's current status, which can be one of the following:
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\table
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\header \li Value \li Description
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\row \li ActiveStatus
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\li The camera has been started and can produce data,
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viewfinder displays video frames.
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Depending on backend, changing camera settings such as
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capture mode, codecs, or resolution in ActiveState may lead
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to changing the status to LoadedStatus and StartingStatus while
|
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the settings are applied, and back to ActiveStatus when the camera is ready.
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\row \li StartingStatus
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\li The camera is starting as a result of state transition to Camera.ActiveState.
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The camera service is not ready to capture yet.
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\row \li StoppingStatus
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\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 QtMultimedia::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 QtMultimedia::Camera::stop()
|
|
|
|
Stops the camera, but leaves the camera
|
|
stack loaded.
|
|
*/
|
|
void QDeclarativeCamera::stop()
|
|
{
|
|
setCameraState(QDeclarativeCamera::LoadedState);
|
|
}
|
|
|
|
|
|
/*!
|
|
\qmlproperty enumeration QtMultimedia::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 QtMultimedia::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 QtMultimedia::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 QtMultimedia::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 QtMultimedia::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 QtMultimedia::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 QtMultimedia::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 QtMultimedia::Camera::mediaObject
|
|
|
|
This property holds the media object for the camera.
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty enumeration QtMultimedia::Camera::errorCode
|
|
|
|
This property holds the last error code.
|
|
|
|
\sa error, errorString
|
|
*/
|
|
|
|
/*!
|
|
\qmlsignal QtMultimedia::Camera::error(errorCode, errorString)
|
|
|
|
This signal is emitted 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
|
|
|
|
The corresponding handler is \c onError.
|
|
|
|
\sa errorCode, errorString
|
|
*/
|
|
|
|
/*!
|
|
\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.
|
|
|
|
The corresponding handler is \c onLockStatusChanged.
|
|
*/
|
|
|
|
/*!
|
|
\qmlsignal Camera::cameraStateChanged(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.
|
|
|
|
The corresponding handler is \c onCameraStateChanged.
|
|
*/
|
|
|
|
/*!
|
|
\qmlsignal Camera::opticalZoomChanged(zoom)
|
|
|
|
This signal is emitted when the optical zoom setting has changed to \a zoom.
|
|
|
|
The corresponding handler is \c onOpticalZoomChanged.
|
|
*/
|
|
|
|
/*!
|
|
\qmlsignal Camera::digitalZoomChanged(zoom)
|
|
|
|
This signal is emitted when the digital zoom setting has changed to \a zoom.
|
|
|
|
The corresponding handler is \c onDigitalZoomChanged.
|
|
*/
|
|
|
|
/*!
|
|
\qmlsignal Camera::maximumOpticalZoomChanged(zoom)
|
|
|
|
This signal is emitted when 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.
|
|
|
|
The corresponding handler is \c onMaximumOpticalZoomChanged.
|
|
*/
|
|
|
|
/*!
|
|
\qmlsignal Camera::maximumDigitalZoomChanged(zoom)
|
|
|
|
This signal is emitted when 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.
|
|
|
|
The corresponding handler is \c onMaximumDigitalZoomChanged.
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.cameraManufacturer
|
|
|
|
This property holds the name of the manufacturer of the camera.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.cameraModel
|
|
|
|
This property holds the name of the model of the camera.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.event
|
|
|
|
This property holds the event during which the photo or video is to be captured.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.subject
|
|
|
|
This property holds the name of the subject of the capture or recording.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.orientation
|
|
|
|
This property holds the clockwise rotation of the camera at time of capture.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.dateTimeOriginal
|
|
|
|
This property holds the initial time at which the photo or video is
|
|
captured.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsLatitude
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsLongitude
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsAltitude
|
|
|
|
These properties hold the geographic position in decimal degrees of the
|
|
camera at time of capture.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsTimestamp
|
|
|
|
This property holds the timestamp of the GPS position data.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsTrack
|
|
|
|
This property holds direction of movement of the camera at the time of
|
|
capture. It is measured in degrees clockwise from north.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsSpeed
|
|
|
|
This property holds the velocity in kilometers per hour of the camera at
|
|
time of capture.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsImgDirection
|
|
|
|
This property holds direction the camera is facing at the time of capture.
|
|
It is measured in degrees clockwise from north.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
/*!
|
|
\qmlproperty variant QtMultimedia::Camera::metaData.gpsProcessingMethod
|
|
|
|
This property holds the name of the method for determining the GPS position
|
|
data.
|
|
|
|
\sa {QMediaMetaData}
|
|
\since 5.4
|
|
*/
|
|
|
|
QDeclarativeMediaMetaData *QDeclarativeCamera::metaData()
|
|
{
|
|
if (!m_metaData)
|
|
m_metaData = new QDeclarativeMediaMetaData(m_camera);
|
|
return m_metaData;
|
|
}
|
|
|
|
/*!
|
|
\qmlpropertygroup QtMultimedia::Camera::viewfinder
|
|
\qmlproperty size QtMultimedia::Camera::viewfinder.resolution
|
|
\qmlproperty real QtMultimedia::Camera::viewfinder.minimumFrameRate
|
|
\qmlproperty real QtMultimedia::Camera::viewfinder.maximumFrameRate
|
|
|
|
These properties hold the viewfinder settings.
|
|
|
|
\c viewfinder.resolution holds the resolution of the camera viewfinder. If no
|
|
resolution is given or if it is empty, the backend uses a default value.
|
|
|
|
\c viewfinder.minimumFrameRate holds the minimum frame rate for the viewfinder in
|
|
frames per second. If no value is given or if set to \c 0, the backend uses a default value.
|
|
|
|
\c viewfinder.maximumFrameRate holds the maximum frame rate for the viewfinder in
|
|
frames per second. If no value is given or if set to \c 0, the backend uses a default value.
|
|
|
|
If \c viewfinder.minimumFrameRate is equal to \c viewfinder.maximumFrameRate, the frame rate is
|
|
fixed. If not, the actual frame rate fluctuates between the two values.
|
|
|
|
Changing the viewfinder settings while the camera is in the \c Camera.ActiveState state may
|
|
cause the camera to be restarted.
|
|
|
|
If the camera is used to capture videos or images, the viewfinder settings might be
|
|
ignored if they conflict with the capture settings. You can check the actual viewfinder settings
|
|
once the camera is in the \c Camera.ActiveStatus status.
|
|
|
|
Supported values can be retrieved with supportedViewfinderResolutions() and
|
|
supportedViewfinderFrameRateRanges().
|
|
|
|
\since 5.4
|
|
*/
|
|
|
|
QDeclarativeCameraViewfinder *QDeclarativeCamera::viewfinder()
|
|
{
|
|
if (!m_viewfinder)
|
|
m_viewfinder = new QDeclarativeCameraViewfinder(m_camera);
|
|
|
|
return m_viewfinder;
|
|
}
|
|
|
|
/*!
|
|
\qmlmethod list<size> QtMultimedia::Camera::supportedViewfinderResolutions(real minimumFrameRate = undefined, real maximumFrameRate = undefined)
|
|
|
|
Returns a list of supported viewfinder resolutions.
|
|
|
|
If both optional parameters \a minimumFrameRate and \a maximumFrameRate are specified, the
|
|
returned list is reduced to resolutions supported for the given frame rate range.
|
|
|
|
The camera must be loaded before calling this function, otherwise the returned list
|
|
is empty.
|
|
|
|
\sa {QtMultimedia::Camera::viewfinder}{viewfinder}
|
|
|
|
\since 5.5
|
|
*/
|
|
QJSValue QDeclarativeCamera::supportedViewfinderResolutions(qreal minimumFrameRate, qreal maximumFrameRate)
|
|
{
|
|
QQmlEngine *engine = qmlEngine(this);
|
|
|
|
QCameraViewfinderSettings settings;
|
|
settings.setMinimumFrameRate(minimumFrameRate);
|
|
settings.setMaximumFrameRate(maximumFrameRate);
|
|
QList<QSize> resolutions = m_camera->supportedViewfinderResolutions(settings);
|
|
|
|
QJSValue supportedResolutions = engine->newArray(resolutions.count());
|
|
int i = 0;
|
|
Q_FOREACH (const QSize &resolution, resolutions) {
|
|
QJSValue size = engine->newObject();
|
|
size.setProperty(QStringLiteral("width"), resolution.width());
|
|
size.setProperty(QStringLiteral("height"), resolution.height());
|
|
supportedResolutions.setProperty(i++, size);
|
|
}
|
|
|
|
return supportedResolutions;
|
|
}
|
|
|
|
/*!
|
|
\qmlmethod list<object> QtMultimedia::Camera::supportedViewfinderFrameRateRanges(size resolution = undefined)
|
|
|
|
Returns a list of supported viewfinder frame rate ranges.
|
|
|
|
Each range object in the list has the \c minimumFrameRate and \c maximumFrameRate properties.
|
|
|
|
If the optional parameter \a resolution is specified, the returned list is reduced to frame rate
|
|
ranges supported for the given \a resolution.
|
|
|
|
The camera must be loaded before calling this function, otherwise the returned list
|
|
is empty.
|
|
|
|
\sa {QtMultimedia::Camera::viewfinder}{viewfinder}
|
|
|
|
\since 5.5
|
|
*/
|
|
QJSValue QDeclarativeCamera::supportedViewfinderFrameRateRanges(const QSize &resolution)
|
|
{
|
|
QQmlEngine *engine = qmlEngine(this);
|
|
|
|
QCameraViewfinderSettings settings;
|
|
settings.setResolution(resolution);
|
|
QList<QCamera::FrameRateRange> frameRateRanges = m_camera->supportedViewfinderFrameRateRanges(settings);
|
|
|
|
QJSValue supportedFrameRateRanges = engine->newArray(frameRateRanges.count());
|
|
int i = 0;
|
|
Q_FOREACH (const QCamera::FrameRateRange &frameRateRange, frameRateRanges) {
|
|
QJSValue range = engine->newObject();
|
|
range.setProperty(QStringLiteral("minimumFrameRate"), frameRateRange.first);
|
|
range.setProperty(QStringLiteral("maximumFrameRate"), frameRateRange.second);
|
|
supportedFrameRateRanges.setProperty(i++, range);
|
|
}
|
|
|
|
return supportedFrameRateRanges;
|
|
}
|
|
|
|
QT_END_NAMESPACE
|
|
|
|
#include "moc_qdeclarativecamera_p.cpp"
|