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diff --git a/src/multimedia/doc/src/changes.qdoc b/src/multimedia/doc/src/changes.qdoc new file mode 100644 index 000000000..f60b4e732 --- /dev/null +++ b/src/multimedia/doc/src/changes.qdoc @@ -0,0 +1,157 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** This file is part of the documentation of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:FDL$ +** GNU Free Documentation License +** Alternatively, this file may be used under the terms of the GNU Free +** Documentation License version 1.3 as published by the Free Software +** Foundation and appearing in the file included in the packaging of +** this file. +** +** 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. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +/*! + +\page changes.html +\title Changes in Qt Multimedia +\brief A description of changes in this version of Qt Multimedia + + +The Qt Multimedia module in Qt 5 is a combination of the Qt Multimedia module +in Qt 4.x and the Qt Multimedia Kit module of Qt Mobility. It replaces both +of these modules by combining the code. If you've previously used Qt Multimedia +there are not too many changes required for existing code, but there are some +larger changes required for porting code that used Qt Multimedia Kit (most notably +the namespace and header file prefix has changed, and the qmake pro file changes +needed to enable Qt Multimedia). + +One other change of note is that widget related classes (like \l QVideoWidget) +are now in a new library (Qt Multimedia Widgets). + +\section1 New features in 5.0 + +There are a number of new features in Qt Multimedia 5.0: +\list +\li Expanded QML API +\li New \l QAudioRecorder class +\li Volume support for QAudioOutput and QAudioInput +\li More examples and documentation +\li QML \l Torch class +\li QSound moved from QtGui to QtMultimedia +\li QSoundEffect available to C++ now, as well as QML +\li FM Radio Data System classes and types now available (\l QRadioData, \l RadioData) +\li Various other API improvements and bugfixes +\endlist + +\section1 Removed features + +A number of classes or features previously offered in Qt Multimedia or Qt Multimedia Kit have +been removed. + +\table 70% + \header + \li Removed feature + \li Notes + \row + \li QMediaImageViewer + \li This class (and related controls and services) were removed since + their functionality was not suitable for many applications +\endtable + +\section1 Changed features + +A number of classes previously offered in Qt Multimedia or Qt Multimedia Kit have +changed in ways that may affect previously written code. There may be other +changes (like new features) that will not affect previously written code, and +they are documented elsewhere. + +\table 70% + \header + \li Changed feature + \li Notes + \row + \li qmake .pro file changes + \li If you've used QtMultimediaKit in the past, you needed to put + \code + CONFIG += mobility + MOBILITY += multimedia + \endcode + in your .pro file. Now you need to use: + \code + QT += multimedia + \endcode + or + \code + QT += multimedia multimediawidgets + \endcode + if you need to use the widget classes. + \row + \li Namespace changes + \li For Qt Multimedia Kit the majority of the classes were in the + normal Qt namespace (usually nothing, unless built specially). There + was a Qt Multimedia Kit namespace for several enumerations. This namespace + has now changed to Qt Multimedia, so if you've used one of the + \c SupportEstimate, \c EncodingQuality, \c EncodingMode or \c AvailabilityStatus + enumerations you'll need to change your code. In fact, running a global + search and replace on \c QtMultimediaKit (to replace it with \c QtMultimedia) will + go a long way with porting your code. + \row + \li Meta-data enumeration changes + \li In Qt Multimedia Kit the available meta-data keys were in an enumeration + in the \c QtMultimediaKit namespace. These meta-data keys have been changed + to string literals in the \c {QtMultimedia::MetaData} namespace - generally your + source code will mostly be compatible unless you have created variables or + parameters with the \c {QtMultimedia::MetaData} type - you should replace these + with \c QString. + \row + \li Meta-data method changes + \li In Qt Multimedia Kit the available meta-data was split between methods to + access standard, pre-defined keys, and methods to access extensible free + form key meta-data. These have been combined into a single method to + access meta-data given a string key, and a list of pre-defined keys. If + you've used the \c extendedMetaData method of any class, you will need + to change your code to combine the standard and extended metadata methods. + \row + \li Qt Metatype registration + \li In Qt Multimedia 5.0 we've tried to make sure that we register any classes + or types that would be useful to use in cross process signals or in + QVariants. If you've previously added Q_DECLARE_METATYPE macros for any + Qt Multimedia class you will probably need to remove them. + \row + \li Video QML type + \li If you've previously used \l Video you may be excited + to learn that it should still work as expected, but you also have + the choice of using \l MediaPlayer and \l VideoOutput + together for more flexible and advanced use cases. + \row + \li QSoundEffect + \li The SoundEffect QML type was public and accessible in Qt Multimeda Kit, + and now the C++ version is also available. If you managed to use the + private class previously, you'll need to update your code. + \row + \li Camera controls + \li A large number of the camera controls (QCameraImageProcessingControl, + QCameraFocusControl etc) have been updated to address a number of + design flaws. If you have previously been using these classes, you + should check the new design. In particular, a number of discrete + accessor methods have been collapsed into parametrized methods, and + the range or data type of some parameters has been adjusted. + +\endtable + +*/ |