bbfccc7135
Qt copyrights are now in The Qt Company, so we could update the source code headers accordingly. In the same go we should also fix the links to point to qt.io. Change-Id: I1c6faa4f59f8eca54f01ef20941fa60161dd7872 Reviewed-by: Yoann Lopes <yoann.lopes@theqtcompany.com>
352 lines
11 KiB
C++
352 lines
11 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 "qdeclarativecameracapture_p.h"
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#include "qdeclarativecamerapreviewprovider_p.h"
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#include <qmetadatawritercontrol.h>
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#include <QtCore/qurl.h>
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QT_BEGIN_NAMESPACE
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/*!
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\qmltype CameraCapture
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\instantiates QDeclarativeCameraCapture
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\brief An interface for capturing camera images
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\ingroup multimedia_qml
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\inqmlmodule QtMultimedia
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\ingroup camera_qml
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This type allows you to capture still images and be notified when they
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are available or saved to disk. You can adjust the resolution of the captured
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image and where the saved image should go.
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CameraCapture is a child of a \l Camera (as the \c imageCapture property)
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and cannot be created directly.
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\qml
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import QtQuick 2.0
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import QtMultimedia 5.0
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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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imageCapture {
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onImageCaptured: {
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// Show the preview in an Image
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photoPreview.source = preview
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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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focus : visible // to receive focus and capture key events when visible
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anchors.fill: parent
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MouseArea {
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anchors.fill: parent;
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onClicked: camera.imageCapture.capture();
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}
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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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*/
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QDeclarativeCameraCapture::QDeclarativeCameraCapture(QCamera *camera, QObject *parent) :
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QObject(parent),
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m_camera(camera)
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{
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m_capture = new QCameraImageCapture(camera, this);
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connect(m_capture, SIGNAL(readyForCaptureChanged(bool)), this, SIGNAL(readyForCaptureChanged(bool)));
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connect(m_capture, SIGNAL(imageExposed(int)), this, SIGNAL(imageExposed(int)));
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connect(m_capture, SIGNAL(imageCaptured(int,QImage)), this, SLOT(_q_imageCaptured(int,QImage)));
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connect(m_capture, SIGNAL(imageMetadataAvailable(int,QString,QVariant)), this,
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SLOT(_q_imageMetadataAvailable(int,QString,QVariant)));
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connect(m_capture, SIGNAL(imageSaved(int,QString)), this, SLOT(_q_imageSaved(int,QString)));
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connect(m_capture, SIGNAL(error(int,QCameraImageCapture::Error,QString)),
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this, SLOT(_q_captureFailed(int,QCameraImageCapture::Error,QString)));
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QMediaService *service = camera->service();
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m_metadataWriterControl = service ? service->requestControl<QMetaDataWriterControl*>() : 0;
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}
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QDeclarativeCameraCapture::~QDeclarativeCameraCapture()
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{
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}
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/*!
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\property QDeclarativeCameraCapture::ready
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This property holds a bool value indicating whether the camera
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is ready to capture photos or not.
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If camera is not ready to capture image immediately,
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the capture request is queued with all the related camera settings,
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and the request will be executed as soon as possible.
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*/
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/*!
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\qmlproperty bool QtMultimedia::CameraCapture::ready
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This property holds a bool value indicating whether the camera
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is ready to capture photos or not.
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It's permissible to call capture() while the camera is active
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regardless of the \e ready property value.
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If camera is not ready to capture image immediately,
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the capture request is queued with all the related camera settings,
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and the request will be executed as soon as possible.
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*/
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bool QDeclarativeCameraCapture::isReadyForCapture() const
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{
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return m_capture->isReadyForCapture();
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}
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/*!
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\qmlmethod QtMultimedia::CameraCapture::capture()
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Start image capture. The \l imageCaptured and \l imageSaved signals will
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be emitted when the capture is complete.
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The image will be captured to the default system location, typically
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QStandardPaths::writableLocation(QStandardPaths::PicturesLocation) for
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still imaged or QStandardPaths::writableLocation(QStandardPaths::MoviesLocation)
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for video.
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Camera saves all the capture parameters like exposure settings or
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image processing parameters, so changes to camera paramaters after
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capture() is called do not affect previous capture requests.
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CameraCapture::capture returns the capture requestId parameter, used with
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imageExposed(), imageCaptured(), imageMetadataAvailable() and imageSaved() signals.
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*/
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int QDeclarativeCameraCapture::capture()
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{
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return m_capture->capture();
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}
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/*!
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\qmlmethod QtMultimedia::CameraCapture::captureToLocation(location)
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Start image capture to specified \a location. The \l imageCaptured and \l imageSaved signals will
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be emitted when the capture is complete.
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CameraCapture::captureToLocation returns the capture requestId parameter, used with
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imageExposed(), imageCaptured(), imageMetadataAvailable() and imageSaved() signals.
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If the application is unable to write to the location specified by \c location
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the CameraCapture will emit an error. The most likely reasons for the application
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to be unable to write to a location is that the path is wrong and the location does not exists,
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or the application does not have write permission for that location.
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*/
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int QDeclarativeCameraCapture::captureToLocation(const QString &location)
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{
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return m_capture->capture(location);
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}
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/*!
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\qmlmethod QtMultimedia::CameraCapture::cancelCapture()
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Cancel pending image capture requests.
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*/
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void QDeclarativeCameraCapture::cancelCapture()
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{
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m_capture->cancelCapture();
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}
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/*!
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\property QDeclarativeCameraCapture::capturedImagePath
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This property holds the location of the last captured image.
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*/
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/*!
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\qmlproperty string QtMultimedia::CameraCapture::capturedImagePath
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This property holds the location of the last captured image.
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*/
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QString QDeclarativeCameraCapture::capturedImagePath() const
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{
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return m_capturedImagePath;
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}
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void QDeclarativeCameraCapture::_q_imageCaptured(int id, const QImage &preview)
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{
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QString previewId = QString("preview_%1").arg(id);
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QDeclarativeCameraPreviewProvider::registerPreview(previewId, preview);
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emit imageCaptured(id, QLatin1String("image://camera/")+previewId);
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}
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void QDeclarativeCameraCapture::_q_imageSaved(int id, const QString &fileName)
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{
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m_capturedImagePath = fileName;
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emit imageSaved(id, fileName);
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}
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void QDeclarativeCameraCapture::_q_imageMetadataAvailable(int id, const QString &key, const QVariant &value)
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{
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emit imageMetadataAvailable(id, key, value);
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}
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void QDeclarativeCameraCapture::_q_captureFailed(int id, QCameraImageCapture::Error error, const QString &message)
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{
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Q_UNUSED(error);
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qWarning() << "QCameraImageCapture error:" << message;
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emit captureFailed(id, message);
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}
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/*!
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\property QDeclarativeCameraCapture::resolution
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This property holds the resolution/size of the image to be captured.
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If empty, the system chooses the appropriate resolution.
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*/
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/*!
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\qmlproperty size QtMultimedia::CameraCapture::resolution
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This property holds the resolution/size of the image to be captured.
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If empty, the system chooses the appropriate resolution.
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*/
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QSize QDeclarativeCameraCapture::resolution()
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{
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return m_imageSettings.resolution();
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}
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void QDeclarativeCameraCapture::setResolution(const QSize &captureResolution)
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{
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m_imageSettings = m_capture->encodingSettings();
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if (captureResolution != resolution()) {
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m_imageSettings.setResolution(captureResolution);
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m_capture->setEncodingSettings(m_imageSettings);
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emit resolutionChanged(captureResolution);
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}
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}
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QCameraImageCapture::Error QDeclarativeCameraCapture::error() const
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{
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return m_capture->error();
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}
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/*!
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\property QDeclarativeCameraCapture::errorString
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This property holds the error message related to the last capture.
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*/
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/*!
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\qmlproperty string QtMultimedia::CameraCapture::errorString
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This property holds the error message related to the last capture.
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*/
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QString QDeclarativeCameraCapture::errorString() const
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{
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return m_capture->errorString();
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}
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/*!
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\qmlmethod QtMultimedia::CameraCapture::setMetadata(key, value)
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Sets a particular metadata \a key to \a value for the subsequent image captures.
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\sa QMediaMetaData
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*/
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void QDeclarativeCameraCapture::setMetadata(const QString &key, const QVariant &value)
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{
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if (m_metadataWriterControl)
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m_metadataWriterControl->setMetaData(key, value);
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}
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/*!
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\qmlsignal QtMultimedia::CameraCapture::captureFailed(requestId, message)
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This signal is emitted when an error occurs during capture with \a requestId.
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A descriptive message is available in \a message.
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The corresponding handler is \c onCaptureFailed.
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*/
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/*!
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\qmlsignal QtMultimedia::CameraCapture::imageCaptured(requestId, preview)
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This signal is emitted when an image with \a requestId has been captured
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but not yet saved to the filesystem. The \a preview
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parameter can be used as the URL supplied to an \l Image.
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The corresponding handler is \c onImageCaptured.
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\sa imageSaved
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*/
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/*!
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\qmlsignal QtMultimedia::CameraCapture::imageSaved(requestId, path)
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This signal is emitted after the image with \a requestId has been written to the filesystem.
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The \a path is a local file path, not a URL.
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The corresponding handler is \c onImageSaved.
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\sa imageCaptured
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*/
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/*!
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\qmlsignal QtMultimedia::CameraCapture::imageMetadataAvailable(requestId, key, value)
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This signal is emitted when the image with \a requestId has new metadata
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available with the key \a key and value \a value.
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The corresponding handler is \c onImageMetadataAvailable.
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\sa imageCaptured
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*/
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QT_END_NAMESPACE
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#include "moc_qdeclarativecameracapture_p.cpp"
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