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Diffstat (limited to 'src/multimedia/video/qabstractvideosurface.cpp')
| -rw-r--r-- | src/multimedia/video/qabstractvideosurface.cpp | 340 |
1 files changed, 0 insertions, 340 deletions
diff --git a/src/multimedia/video/qabstractvideosurface.cpp b/src/multimedia/video/qabstractvideosurface.cpp deleted file mode 100644 index 4d65d7e..0000000 --- a/src/multimedia/video/qabstractvideosurface.cpp +++ /dev/null @@ -1,340 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2010 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. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -//TESTED_COMPONENT=src/multimedia - -#include "qabstractvideosurface.h" - -#include "qvideosurfaceformat.h" - -#include <QtCore/qvariant.h> - -QT_BEGIN_NAMESPACE - -Q_DECLARE_METATYPE(QVideoSurfaceFormat) -Q_DECLARE_METATYPE(QAbstractVideoSurface::Error) - -/*! - \class QAbstractVideoSurface - \brief The QAbstractVideoSurface class is a base class for video presentation surfaces. - \since 1.0 - \inmodule QtMultimedia - - A video surface presents a continuous stream of identically formatted frames, where the format - of each frame is compatible with a stream format supplied when starting a presentation. - - The QAbstractVideoSurface class defines the standard interface that video producers use to - inter-operate with video presentation surfaces. It is not supposed to be instantiated directly. - Instead, you should subclass it to create new video surfaces. - - A list of pixel formats a surface can present is given by the supportedPixelFormats() function, - and the isFormatSupported() function will test if a video surface format is supported. If a - format is not supported the nearestFormat() function may be able to suggest a similar format. - For example, if a surface supports fixed set of resolutions it may suggest the smallest - supported resolution that contains the proposed resolution. - - The start() function takes a supported format and enables a video surface. Once started a - surface will begin displaying the frames it receives in the present() function. Surfaces may - hold a reference to the buffer of a presented video frame until a new frame is presented or - streaming is stopped. The stop() function will disable a surface and a release any video - buffers it holds references to. -*/ - -/*! - \enum QAbstractVideoSurface::Error - This enum describes the errors that may be returned by the error() function. - - \value NoError No error occurred. - \value UnsupportedFormatError A video format was not supported. - \value IncorrectFormatError A video frame was not compatible with the format of the surface. - \value StoppedError The surface has not been started. - \value ResourceError The surface could not allocate some resource. -*/ - -/*! - Constructs a video surface with the given \a parent. -*/ -QAbstractVideoSurface::QAbstractVideoSurface(QObject *parent) - : QObject(parent) -{ - setProperty("_q_surfaceFormat", QVariant::fromValue(QVideoSurfaceFormat())); - setProperty("_q_active", false); - setProperty("_q_error", QVariant::fromValue(QAbstractVideoSurface::NoError)); - setProperty("_q_nativeResolution", QSize()); -} - -// XXX Qt5 -/*! - \internal - - This is deprecated. - - Since we need to build without access to Qt's private headers we can't reliably inherit - from QObjectPrivate. Binary compatibility means we can't remove this constructor or - add a d pointer to QAbstractVideoSurface. -*/ -QAbstractVideoSurface::QAbstractVideoSurface(QAbstractVideoSurfacePrivate &, QObject *parent) - : QObject(parent) -{ -} - -/*! - Destroys a video surface. -*/ -QAbstractVideoSurface::~QAbstractVideoSurface() -{ -} - -/*! - \fn QAbstractVideoSurface::supportedPixelFormats(QAbstractVideoBuffer::HandleType type) const - - Returns a list of pixel formats a video surface can present for a given handle \a type. - - The pixel formats returned for the QAbstractVideoBuffer::NoHandle type are valid for any buffer - that can be mapped in read-only mode. - - Types that are first in the list can be assumed to be faster to render. - \since 1.0 -*/ - -/*! - Tests a video surface \a format to determine if a surface can accept it. - - Returns true if the format is supported by the surface, and false otherwise. - \since 1.0 -*/ -bool QAbstractVideoSurface::isFormatSupported(const QVideoSurfaceFormat &format) const -{ - return supportedPixelFormats(format.handleType()).contains(format.pixelFormat()); -} - -/*! - Returns a supported video surface format that is similar to \a format. - - A similar surface format is one that has the same \l {QVideoSurfaceFormat::pixelFormat()}{pixel - format} and \l {QVideoSurfaceFormat::handleType()}{handle type} but may differ in some of the other - properties. For example, if there are restrictions on the \l {QVideoSurfaceFormat::frameSize()} - {frame sizes} a video surface can accept it may suggest a format with a larger frame size and - a \l {QVideoSurfaceFormat::viewport()}{viewport} the size of the original frame size. - - If the format is already supported it will be returned unchanged, or if there is no similar - supported format an invalid format will be returned. - \since 1.0 -*/ -QVideoSurfaceFormat QAbstractVideoSurface::nearestFormat(const QVideoSurfaceFormat &format) const -{ - return isFormatSupported(format) - ? format - : QVideoSurfaceFormat(); -} - -/*! - \fn QAbstractVideoSurface::supportedFormatsChanged() - - Signals that the set of formats supported by a video surface has changed. - - \since 1.0 - \sa supportedPixelFormats(), isFormatSupported() -*/ - -/*! - Returns the format of a video surface. - \since 1.0 -*/ -QVideoSurfaceFormat QAbstractVideoSurface::surfaceFormat() const -{ - return property("_q_format").value<QVideoSurfaceFormat>(); -} - -/*! - \fn QAbstractVideoSurface::surfaceFormatChanged(const QVideoSurfaceFormat &format) - - Signals that the configured \a format of a video surface has changed. - - \since 1.0 - \sa surfaceFormat(), start() -*/ - -/*! - Starts a video surface presenting \a format frames. - - Returns true if the surface was started, and false if an error occurred. - - \since 1.0 - \sa isActive(), stop() -*/ -bool QAbstractVideoSurface::start(const QVideoSurfaceFormat &format) -{ - bool wasActive = property("_q_active").toBool(); - - setProperty("_q_active", true); - setProperty("_q_format", QVariant::fromValue(format)); - setProperty("_q_error", QVariant::fromValue(NoError)); - - emit surfaceFormatChanged(format); - - if (!wasActive) - emit activeChanged(true); - - return true; -} - -/*! - Stops a video surface presenting frames and releases any resources acquired in start(). - - \since 1.0 - \sa isActive(), start() -*/ -void QAbstractVideoSurface::stop() -{ - if (property("_q_active").toBool()) { - setProperty("_q_format", QVariant::fromValue(QVideoSurfaceFormat())); - setProperty("_q_active", false); - - emit activeChanged(false); - emit surfaceFormatChanged(surfaceFormat()); - } -} - -/*! - Indicates whether a video surface has been started. - - Returns true if the surface has been started, and false otherwise. - \since 1.0 -*/ -bool QAbstractVideoSurface::isActive() const -{ - return property("_q_active").toBool(); -} - -/*! - \fn QAbstractVideoSurface::activeChanged(bool active) - - Signals that the \a active state of a video surface has changed. - - \since 1.0 - \sa isActive(), start(), stop() -*/ - -/*! - \fn QAbstractVideoSurface::present(const QVideoFrame &frame) - - Presents a video \a frame. - - Returns true if the frame was presented, and false if an error occurred. - - Not all surfaces will block until the presentation of a frame has completed. Calling present() - on a non-blocking surface may fail if called before the presentation of a previous frame has - completed. In such cases the surface may not return to a ready state until it has had an - opportunity to process events. - - If present() fails for any other reason the surface will immediately enter the stopped state - and an error() value will be set. - - A video surface must be in the started state for present() to succeed, and the format of the - video frame must be compatible with the current video surface format. - - \since 1.0 - \sa error() -*/ - -/*! - Returns the last error that occurred. - - If a surface fails to start(), or stops unexpectedly this function can be called to discover - what error occurred. - \since 1.0 -*/ - -QAbstractVideoSurface::Error QAbstractVideoSurface::error() const -{ - return property("_q_error").value<QAbstractVideoSurface::Error>(); -} - -/*! - Sets the value of error() to \a error. - \since 1.0 -*/ -void QAbstractVideoSurface::setError(Error error) -{ - setProperty("_q_error", QVariant::fromValue(error)); -} - -/*! - \property QAbstractVideoSurface::nativeResolution - - The native resolution of video surface. - This is the resolution of video frames the surface - can render with optimal quality and/or performance. - - The native resolution is not always known and can be changed during playback. - \since 1.1 - */ -QSize QAbstractVideoSurface::nativeResolution() const -{ - return property("_q_nativeResolution").toSize(); -} - -/*! - Set the video surface native \a resolution. - \since 1.1 - */ -void QAbstractVideoSurface::setNativeResolution(const QSize &resolution) -{ - const QSize nativeResolution = property("_q_nativeResolution").toSize(); - - if (nativeResolution != resolution) { - setProperty("_q_nativeResolution", resolution); - - emit nativeResolutionChanged(resolution); - } -} -/*! - \fn QAbstractVideoSurface::nativeResolutionChanged(const QSize &resolution); - - Signals the native \a resolution of video surface has changed. - \since 1.1 -*/ - -QT_END_NAMESPACE - -#include "moc_qabstractvideosurface.cpp" - |