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Diffstat (limited to 'src/multimedia/qcameraimagecapture.cpp')
| -rw-r--r-- | src/multimedia/qcameraimagecapture.cpp | 681 |
1 files changed, 681 insertions, 0 deletions
diff --git a/src/multimedia/qcameraimagecapture.cpp b/src/multimedia/qcameraimagecapture.cpp new file mode 100644 index 000000000..6b399b684 --- /dev/null +++ b/src/multimedia/qcameraimagecapture.cpp @@ -0,0 +1,681 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** GNU Lesser General Public License Usage +** This file may be used under the terms of the GNU Lesser General Public +** License version 2.1 as published by the Free Software Foundation and +** appearing in the file LICENSE.LGPL included in the packaging of this +** file. Please review the following information to ensure the GNU Lesser +** General Public License version 2.1 requirements will be met: +** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU General +** Public License version 3.0 as published by the Free Software Foundation +** and appearing in the file LICENSE.GPL included in the packaging of this +** file. 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. +** +** Other Usage +** Alternatively, this file may be used in accordance with the terms and +** conditions contained in a signed written agreement between you and Nokia. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#include <qcameraimagecapture.h> +#include <qcameraimagecapturecontrol.h> +#include <qmediaencodersettings.h> +#include <qcameracapturedestinationcontrol.h> +#include <qcameracapturebufferformatcontrol.h> + +#include <qimageencodercontrol.h> +#include <qmediaobject_p.h> +#include <qmediaservice.h> +#include <qcamera.h> +#include <qcameracontrol.h> +#include <QtCore/qdebug.h> +#include <QtCore/qurl.h> +#include <QtCore/qstringlist.h> +#include <QtCore/qmetaobject.h> + +QT_BEGIN_NAMESPACE + +/*! + \class QCameraImageCapture + \inmodule QtMultimedia + \ingroup camera + \since 1.1 + + + \brief The QCameraImageCapture class is used for the recording of media content. + + The QCameraImageCapture class is a high level images recording class. + It's not intended to be used alone but for accessing the media + recording functions of other media objects, like QCamera. + + \snippet doc/src/snippets/multimedia-snippets/camera.cpp Camera + + \snippet doc/src/snippets/multimedia-snippets/camera.cpp Camera keys + + \sa QCamera +*/ + +namespace +{ +class MediaRecorderRegisterMetaTypes +{ +public: + MediaRecorderRegisterMetaTypes() + { + qRegisterMetaType<QCameraImageCapture::Error>("QCameraImageCapture::Error"); + qRegisterMetaType<QCameraImageCapture::CaptureDestination>("QCameraImageCapture::CaptureDestination"); + qRegisterMetaType<QCameraImageCapture::CaptureDestinations>("QCameraImageCapture::CaptureDestinations"); + } +} _registerRecorderMetaTypes; +} + + +class QCameraImageCapturePrivate +{ + Q_DECLARE_NON_CONST_PUBLIC(QCameraImageCapture) +public: + QCameraImageCapturePrivate(); + + QMediaObject *mediaObject; + + QCameraImageCaptureControl *control; + QImageEncoderControl *encoderControl; + QCameraCaptureDestinationControl *captureDestinationControl; + QCameraCaptureBufferFormatControl *bufferFormatControl; + + QCameraImageCapture::Error error; + QString errorString; + + void _q_error(int id, int error, const QString &errorString); + void _q_readyChanged(bool); + void _q_serviceDestroyed(); + + void unsetError() { error = QCameraImageCapture::NoError; errorString.clear(); } + + QCameraImageCapture *q_ptr; +}; + +QCameraImageCapturePrivate::QCameraImageCapturePrivate(): + mediaObject(0), + control(0), + encoderControl(0), + captureDestinationControl(0), + bufferFormatControl(0), + error(QCameraImageCapture::NoError) +{ +} + +void QCameraImageCapturePrivate::_q_error(int id, int error, const QString &errorString) +{ + Q_Q(QCameraImageCapture); + + this->error = QCameraImageCapture::Error(error); + this->errorString = errorString; + + emit q->error(id, this->error, errorString); +} + +void QCameraImageCapturePrivate::_q_readyChanged(bool ready) +{ + Q_Q(QCameraImageCapture); + emit q->readyForCaptureChanged(ready); +} + +void QCameraImageCapturePrivate::_q_serviceDestroyed() +{ + mediaObject = 0; + control = 0; + encoderControl = 0; + captureDestinationControl = 0; + bufferFormatControl = 0; +} + +/*! + Constructs a media recorder which records the media produced by \a mediaObject. + + The \a parent is passed to QMediaObject. +*/ + +QCameraImageCapture::QCameraImageCapture(QMediaObject *mediaObject, QObject *parent): + QObject(parent), d_ptr(new QCameraImageCapturePrivate) +{ + Q_D(QCameraImageCapture); + + d->q_ptr = this; + + if (mediaObject) + mediaObject->bind(this); +} + +/*! + Destroys images capture object. +*/ + +QCameraImageCapture::~QCameraImageCapture() +{ + Q_D(QCameraImageCapture); + + if (d->mediaObject) + d->mediaObject->unbind(this); +} + +/*! + \reimp + \since 1.1 +*/ +QMediaObject *QCameraImageCapture::mediaObject() const +{ + return d_func()->mediaObject; +} + +/*! + \reimp + \since 1.1 +*/ +bool QCameraImageCapture::setMediaObject(QMediaObject *mediaObject) +{ + Q_D(QCameraImageCapture); + + if (d->mediaObject) { + if (d->control) { + disconnect(d->control, SIGNAL(imageExposed(int)), + this, SIGNAL(imageExposed(int))); + disconnect(d->control, SIGNAL(imageCaptured(int,QImage)), + this, SIGNAL(imageCaptured(int,QImage))); + disconnect(d->control, SIGNAL(imageAvailable(int,QVideoFrame)), + this, SIGNAL(imageAvailable(int,QVideoFrame))); + disconnect(d->control, SIGNAL(imageMetadataAvailable(int,QtMultimedia::MetaData,QVariant)), + this, SIGNAL(imageMetadataAvailable(int,QtMultimedia::MetaData,QVariant))); + disconnect(d->control, SIGNAL(imageMetadataAvailable(int,QString,QVariant)), + this, SIGNAL(imageMetadataAvailable(int,QString,QVariant))); + disconnect(d->control, SIGNAL(imageSaved(int,QString)), + this, SIGNAL(imageSaved(int,QString))); + disconnect(d->control, SIGNAL(readyForCaptureChanged(bool)), + this, SLOT(_q_readyChanged(bool))); + disconnect(d->control, SIGNAL(error(int,int,QString)), + this, SLOT(_q_error(int,int,QString))); + + if (d->captureDestinationControl) { + disconnect(d->captureDestinationControl, SIGNAL(captureDestinationChanged(QCameraImageCapture::CaptureDestinations)), + this, SIGNAL(captureDestinationChanged(QCameraImageCapture::CaptureDestinations))); + } + + if (d->bufferFormatControl) { + disconnect(d->bufferFormatControl, SIGNAL(bufferFormatChanged(QVideoFrame::PixelFormat)), + this, SIGNAL(bufferFormatChanged(QVideoFrame::PixelFormat))); + } + + QMediaService *service = d->mediaObject->service(); + service->releaseControl(d->control); + if (d->encoderControl) + service->releaseControl(d->encoderControl); + if (d->captureDestinationControl) + service->releaseControl(d->captureDestinationControl); + if (d->bufferFormatControl) + service->releaseControl(d->bufferFormatControl); + + disconnect(service, SIGNAL(destroyed()), this, SLOT(_q_serviceDestroyed())); + } + } + + d->mediaObject = mediaObject; + + if (d->mediaObject) { + QMediaService *service = mediaObject->service(); + if (service) { + d->control = qobject_cast<QCameraImageCaptureControl*>(service->requestControl(QCameraImageCaptureControl_iid)); + + if (d->control) { + d->encoderControl = qobject_cast<QImageEncoderControl *>(service->requestControl(QImageEncoderControl_iid)); + d->captureDestinationControl = qobject_cast<QCameraCaptureDestinationControl *>( + service->requestControl(QCameraCaptureDestinationControl_iid)); + d->bufferFormatControl = qobject_cast<QCameraCaptureBufferFormatControl *>( + service->requestControl(QCameraCaptureBufferFormatControl_iid)); + + connect(d->control, SIGNAL(imageExposed(int)), + this, SIGNAL(imageExposed(int))); + connect(d->control, SIGNAL(imageCaptured(int,QImage)), + this, SIGNAL(imageCaptured(int,QImage))); + connect(d->control, SIGNAL(imageMetadataAvailable(int,QtMultimedia::MetaData,QVariant)), + this, SIGNAL(imageMetadataAvailable(int,QtMultimedia::MetaData,QVariant))); + connect(d->control, SIGNAL(imageMetadataAvailable(int,QString,QVariant)), + this, SIGNAL(imageMetadataAvailable(int,QString,QVariant))); + connect(d->control, SIGNAL(imageAvailable(int,QVideoFrame)), + this, SIGNAL(imageAvailable(int,QVideoFrame))); + connect(d->control, SIGNAL(imageSaved(int, QString)), + this, SIGNAL(imageSaved(int, QString))); + connect(d->control, SIGNAL(readyForCaptureChanged(bool)), + this, SLOT(_q_readyChanged(bool))); + connect(d->control, SIGNAL(error(int,int,QString)), + this, SLOT(_q_error(int,int,QString))); + + if (d->captureDestinationControl) { + connect(d->captureDestinationControl, SIGNAL(captureDestinationChanged(QCameraImageCapture::CaptureDestinations)), + this, SIGNAL(captureDestinationChanged(QCameraImageCapture::CaptureDestinations))); + } + + if (d->bufferFormatControl) { + connect(d->bufferFormatControl, SIGNAL(bufferFormatChanged(QVideoFrame::PixelFormat)), + this, SIGNAL(bufferFormatChanged(QVideoFrame::PixelFormat))); + } + + connect(service, SIGNAL(destroyed()), this, SLOT(_q_serviceDestroyed())); + + return true; + } + } + } + + // without QCameraImageCaptureControl discard the media object + d->mediaObject = 0; + d->control = 0; + d->encoderControl = 0; + d->captureDestinationControl = 0; + d->bufferFormatControl = 0; + + return false; +} + +/*! + Returns true if the images capture service ready to use. + \since 1.1 +*/ +bool QCameraImageCapture::isAvailable() const +{ + if (d_func()->control != NULL) + return true; + else + return false; +} + +/*! + Returns the availability error code. + \since 1.1 +*/ +QtMultimedia::AvailabilityError QCameraImageCapture::availabilityError() const +{ + if (d_func()->control != NULL) + return QtMultimedia::NoError; + else + return QtMultimedia::ServiceMissingError; +} + +/*! + Returns the current error state. + + \since 1.1 + \sa errorString() +*/ + +QCameraImageCapture::Error QCameraImageCapture::error() const +{ + return d_func()->error; +} + +/*! + Returns a string describing the current error state. + + \since 1.1 + \sa error() +*/ + +QString QCameraImageCapture::errorString() const +{ + return d_func()->errorString; +} + + +/*! + Returns a list of supported image codecs. + \since 1.1 +*/ +QStringList QCameraImageCapture::supportedImageCodecs() const +{ + return d_func()->encoderControl ? + d_func()->encoderControl->supportedImageCodecs() : QStringList(); +} + +/*! + Returns a description of an image \a codec. + \since 1.1 +*/ +QString QCameraImageCapture::imageCodecDescription(const QString &codec) const +{ + return d_func()->encoderControl ? + d_func()->encoderControl->imageCodecDescription(codec) : QString(); +} + +/*! + Returns a list of resolutions images can be encoded at. + + If non null image \a settings parameter is passed, + the returned list is reduced to resolution supported with partial settings like image codec or quality applied. + + If the encoder supports arbitrary resolutions within the supported range, + *\a continuous is set to true, otherwise *\a continuous is set to false. + + \since 1.1 + \sa QImageEncoderSettings::resolution() +*/ +QList<QSize> QCameraImageCapture::supportedResolutions(const QImageEncoderSettings &settings, bool *continuous) const +{ + if (continuous) + *continuous = false; + + return d_func()->encoderControl ? + d_func()->encoderControl->supportedResolutions(settings, continuous) : QList<QSize>(); +} + +/*! + Returns the image encoder settings being used. + + \since 1.1 + \sa setEncodingSettings() +*/ + +QImageEncoderSettings QCameraImageCapture::encodingSettings() const +{ + return d_func()->encoderControl ? + d_func()->encoderControl->imageSettings() : QImageEncoderSettings(); +} + +/*! + Sets the image encoding \a settings. + + If some parameters are not specified, or null settings are passed, + the encoder choose the default encoding parameters. + + \since 1.1 + \sa encodingSettings() +*/ + +void QCameraImageCapture::setEncodingSettings(const QImageEncoderSettings &settings) +{ + Q_D(QCameraImageCapture); + + if (d->encoderControl) { + QCamera *camera = qobject_cast<QCamera*>(d->mediaObject); + if (camera && camera->captureMode() == QCamera::CaptureStillImage) { + QMetaObject::invokeMethod(camera, + "_q_preparePropertyChange", + Qt::DirectConnection, + Q_ARG(int, QCameraControl::ImageEncodingSettings)); + } + + d->encoderControl->setImageSettings(settings); + } +} + +/*! + Returns the list of supported buffer image capture formats. + + \since 1.1 + \sa bufferFormat() setBufferFormat() +*/ +QList<QVideoFrame::PixelFormat> QCameraImageCapture::supportedBufferFormats() const +{ + if (d_func()->bufferFormatControl) + return d_func()->bufferFormatControl->supportedBufferFormats(); + else + return QList<QVideoFrame::PixelFormat>(); +} + +/*! + Returns the buffer image capture format being used. + + \since 1.2 + \sa supportedBufferCaptureFormats() setBufferCaptureFormat() +*/ +QVideoFrame::PixelFormat QCameraImageCapture::bufferFormat() const +{ + if (d_func()->bufferFormatControl) + return d_func()->bufferFormatControl->bufferFormat(); + else + return QVideoFrame::Format_Invalid; +} + +/*! + Sets the buffer image capture format to be used. + + \since 1.2 + \sa bufferCaptureFormat() supportedBufferCaptureFormats() captureDestination() +*/ +void QCameraImageCapture::setBufferFormat(const QVideoFrame::PixelFormat format) +{ + if (d_func()->bufferFormatControl) + d_func()->bufferFormatControl->setBufferFormat(format); +} + +/*! + Returns true if the image capture \a destination is supported; otherwise returns false. + + \since 1.2 + \sa captureDestination() setCaptureDestination() +*/ +bool QCameraImageCapture::isCaptureDestinationSupported(QCameraImageCapture::CaptureDestinations destination) const +{ + if (d_func()->captureDestinationControl) + return d_func()->captureDestinationControl->isCaptureDestinationSupported(destination); + else + return destination == CaptureToFile; +} + +/*! + Returns the image capture destination being used. + + \since 1.2 + \sa isCaptureDestinationSupported() setCaptureDestination() +*/ +QCameraImageCapture::CaptureDestinations QCameraImageCapture::captureDestination() const +{ + if (d_func()->captureDestinationControl) + return d_func()->captureDestinationControl->captureDestination(); + else + return CaptureToFile; +} + +/*! + Sets the capture \a destination to be used. + + \since 1.2 + \sa isCaptureDestinationSupported() captureDestination() +*/ +void QCameraImageCapture::setCaptureDestination(QCameraImageCapture::CaptureDestinations destination) +{ + Q_D(QCameraImageCapture); + + if (d->captureDestinationControl) + d->captureDestinationControl->setCaptureDestination(destination); +} + +/*! + \property QCameraImageCapture::readyForCapture + Indicates the service is ready to capture a an image immediately. + \since 1.1 +*/ + +bool QCameraImageCapture::isReadyForCapture() const +{ + if (d_func()->control) + return d_func()->control->isReadyForCapture(); + else + return false; +} + +/*! + \fn QCameraImageCapture::readyForCaptureChanged(bool ready) + + Signals that a camera's \a ready for capture state has changed. + \since 1.1 +*/ + + +/*! + Capture the image and save it to \a file. + This operation is asynchronous in majority of cases, + followed by signals QCameraImageCapture::imageCaptured(), QCameraImageCapture::imageSaved() + or QCameraImageCapture::error(). + + If an empty \a file is passed, the camera backend choses + the default location and naming scheme for photos on the system, + if only file name without full path is specified, the image will be saved to + the default directory, with a full path reported with imageCaptured() and imageSaved() signals. + + QCameraImageCapture::capture returns the capture Id parameter, used with + imageExposed(), imageCaptured() and imageSaved() signals. + \since 1.1 +*/ +int QCameraImageCapture::capture(const QString &file) +{ + Q_D(QCameraImageCapture); + + d->unsetError(); + + if (d->control) { + return d->control->capture(file); + } else { + d->error = NotSupportedFeatureError; + d->errorString = tr("Device does not support images capture."); + + emit error(-1, d->error, d->errorString); + } + + return -1; +} + +/*! + Cancel incomplete capture requests. + Already captured and queused for proicessing images may be discarded. + \since 1.1 +*/ +void QCameraImageCapture::cancelCapture() +{ + Q_D(QCameraImageCapture); + + d->unsetError(); + + if (d->control) { + d->control->cancelCapture(); + } else { + d->error = NotSupportedFeatureError; + d->errorString = tr("Device does not support images capture."); + + emit error(-1, d->error, d->errorString); + } +} + + +/*! + \enum QCameraImageCapture::Error + + \value NoError No Errors. + \value NotReadyError The service is not ready for capture yet. + \value ResourceError Device is not ready or not available. + \value NotSupportedFeatureError Device does not support stillimages capture. + \value FormatError Current format is not supported. + \value OutOfSpaceError No space left on device. +*/ + +/*! + \enum QCameraImageCapture::DriveMode + + \value SingleImageCapture Drive mode is capturing a single picture. +*/ + +/*! + \fn QCameraImageCapture::error(int id, QCameraImageCapture::Error error, const QString &errorString) + + Signals that the capture request \a id has failed with an \a error + and \a errorString description. + \since 1.1 +*/ + +/*! + \fn QCameraImageCapture::bufferFormatChanged(QVideoFrame::PixelFormat format) + + Signal emitted when the buffer \a format for the buffer image capture has changed. + \since 1.2 +*/ + +/*! + \fn QCameraImageCapture::captureDestinationChanged(CaptureDestinations destination) + + Signal emitted when the capture \a destination has changed. + \since 1.2 +*/ + +/*! + \fn QCameraImageCapture::imageExposed(int id) + + Signal emitted when the frame with request \a id was exposed. + \since 1.1 +*/ + +/*! + \fn QCameraImageCapture::imageCaptured(int id, const QImage &preview); + + Signal emitted when the frame with request \a id was captured, but not processed and saved yet. + Frame \a preview can be displayed to user. + \since 1.1 +*/ + +/*! + \fn QCameraImageCapture::imageMetadataAvailable(int id, QtMultimedia::MetaData key, const QVariant &value) + + Signals that a metadata for an image with request \a id is available. + This signal is emitted for metadata \a value with a \a key listed in QtMultimedia::MetaData enum. + + This signal is emitted between imageExposed and imageSaved signals. + \since 1.2 +*/ + +/*! + \fn QCameraImageCapture::imageMetadataAvailable(int id, const QString &key, const QVariant &value) + + Signals that a metadata for an image with request \a id is available. + This signal is emitted for extended metadata \a value with a \a key not listed in QtMultimedia::MetaData enum. + + This signal is emitted between imageExposed and imageSaved signals. + \since 1.2 +*/ + + +/*! + \fn QCameraImageCapture::imageAvailable(int id, const QVideoFrame &buffer) + + Signal emitted when the frame with request \a id is available as \a buffer. + \since 1.2 +*/ + +/*! + \fn QCameraImageCapture::imageSaved(int id, const QString &fileName) + + Signal emitted when the frame with request \a id was saved to \a fileName. + \since 1.1 +*/ + + +#include "moc_qcameraimagecapture.cpp" +QT_END_NAMESPACE + |