src/multimedia/qmediapluginloader.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Mon, 04 Oct 2010 01:37:06 +0300
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permissions -rw-r--r--
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/****************************************************************************
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**
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the Qt Mobility Components.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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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 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file.  Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights.  These rights are described in the Nokia Qt 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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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qmediapluginloader_p.h"
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#include <QtCore/qcoreapplication.h>
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#include <QtCore/qpluginloader.h>
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#include <QtCore/qdir.h>
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#include <QtCore/qdebug.h>
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#include "qmediaserviceproviderplugin.h"
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#if defined(Q_OS_SYMBIAN)
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# include <f32file.h>
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#endif
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#if defined(Q_OS_MAC)
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# include <CoreFoundation/CoreFoundation.h>
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#endif
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QT_BEGIN_NAMESPACE
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typedef QMap<QString,QObjectList> ObjectListMap;
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Q_GLOBAL_STATIC(ObjectListMap, staticMediaPlugins);
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#if defined(Q_OS_SYMBIAN)
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// XXX: Copied over from Mobility, hopefully to be removed at some point
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class DirChecker
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{
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public:
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    DirChecker();
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    ~DirChecker();
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    bool checkDir(const QDir& dir);
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private:
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    RFs rfs;
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};
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DirChecker::DirChecker()
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{
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    qt_symbian_throwIfError(rfs.Connect());
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}
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bool DirChecker::checkDir(const QDir& dir)
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{
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    bool pathFound = false;
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    // In Symbian, going cdUp() in a c:/private/<uid3>/ will result in *platsec* error at fileserver (requires AllFiles capability)
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    // Also, trying to cd() to a nonexistent directory causes *platsec* error. This does not cause functional harm, but should
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    // nevertheless be changed to use native Symbian methods to avoid unnecessary platsec warnings (as per qpluginloader.cpp).
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    // Use native Symbian code to check for directory existence, because checking
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    // for files from under non-existent protected dir like E:/private/<uid> using
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    // QDir::exists causes platform security violations on most apps.
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    QString nativePath = QDir::toNativeSeparators(dir.absolutePath());
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    TPtrC ptr = TPtrC16(static_cast<const TUint16*>(nativePath.utf16()), nativePath.length());
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    TUint attributes;
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    TInt err = rfs.Att(ptr, attributes);
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    if (err == KErrNone) {
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        // yes, the directory exists.
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        pathFound = true;
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    }
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    return pathFound;
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}
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DirChecker::~DirChecker()
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{
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    rfs.Close();
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}
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#endif
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0
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QMediaPluginLoader::QMediaPluginLoader(const char *iid, const QString &location, Qt::CaseSensitivity):
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    m_iid(iid)
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{
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    m_location = QString::fromLatin1("/%1").arg(location);
0
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    load();
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}
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   115
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QStringList QMediaPluginLoader::keys() const
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{
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    return m_instances.keys();
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}
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QObject* QMediaPluginLoader::instance(QString const &key)
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{
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    return m_instances.value(key);
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}
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QList<QObject*> QMediaPluginLoader::instances(QString const &key)
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{
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    return m_instances.values(key);
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}
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//to be used for testing purposes only
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void QMediaPluginLoader::setStaticPlugins(const QString &location, const QObjectList& objects)
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{
5
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    staticMediaPlugins()->insert(QString::fromLatin1("/%1").arg(location), objects);
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}
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QStringList QMediaPluginLoader::availablePlugins() const
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{
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    QStringList paths;
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    QStringList plugins;
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#if defined(Q_OS_SYMBIAN)
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    DirChecker dirChecker;
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#endif
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#if defined(Q_OS_MAC)
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    QString imageSuffix(qgetenv("DYLD_IMAGE_SUFFIX"));
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    // Bundle plugin directory
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    CFBundleRef mainBundle = CFBundleGetMainBundle();
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    if (mainBundle != 0) {
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        CFURLRef baseUrl = CFBundleCopyBundleURL(mainBundle);
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        CFURLRef pluginUrlPart = CFBundleCopyBuiltInPlugInsURL(mainBundle);
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        CFStringRef pluginPathPart = CFURLCopyFileSystemPath(pluginUrlPart, kCFURLPOSIXPathStyle);
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        CFURLRef pluginUrl = CFURLCreateCopyAppendingPathComponent(0, baseUrl, pluginPathPart, true);
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        CFStringRef pluginPath = CFURLCopyFileSystemPath(pluginUrl, kCFURLPOSIXPathStyle);
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        CFIndex length = CFStringGetLength(pluginPath);
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        UniChar buffer[length];
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        CFStringGetCharacters(pluginPath, CFRangeMake(0, length), buffer);
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        paths << QString(reinterpret_cast<const QChar *>(buffer), length);
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   163
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        CFRelease(pluginPath);
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        CFRelease(pluginUrl);
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        CFRelease(pluginPathPart);
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        CFRelease(pluginUrlPart);
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        CFRelease(baseUrl);
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    }
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#endif
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#ifdef QTM_PLUGIN_PATH
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    // Mobility's plugin directory
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    paths << QLatin1String(QTM_PLUGIN_PATH);
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#endif
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    // Qt paths
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    paths << QCoreApplication::libraryPaths();
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   179
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    foreach (const QString &path, paths) {
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        QDir typeDir(path + m_location);
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#if defined(Q_OS_SYMBIAN)
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        if (dirChecker.checkDir(typeDir))
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#endif
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        {
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            foreach (const QString &file, typeDir.entryList(QDir::Files)) {
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#if defined(Q_OS_MAC)
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                if (!imageSuffix.isEmpty()) {   // Only add appropriate images
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                    if (file.lastIndexOf(imageSuffix, -6) == -1)
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                        continue;
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                } else {  // Ignore any images with common suffixes
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                    if (file.endsWith(QLatin1String("_debug.dylib")) ||
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                        file.endsWith(QLatin1String("_profile.dylib")))
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                        continue;
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   195
                }
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#elif defined(Q_OS_UNIX)
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                // Ignore separate debug files
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                if (file.endsWith(QLatin1String(".debug")))
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                    continue;
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#elif defined(Q_OS_WIN)
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                // Ignore non-dlls
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                if (!file.endsWith(QLatin1String(".dll"), Qt::CaseInsensitive))
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                    continue;
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#endif
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                plugins << typeDir.absoluteFilePath(file);
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            }
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        }
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    }
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    return  plugins;
0
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}
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   212
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void QMediaPluginLoader::load()
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{
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    if (!m_instances.isEmpty())
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        return;
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   217
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    if (staticMediaPlugins() && staticMediaPlugins()->contains(m_location)) {
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        foreach(QObject *o, staticMediaPlugins()->value(m_location)) {
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            if (o != 0 && o->qt_metacast(m_iid) != 0) {
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                QFactoryInterface* p = qobject_cast<QFactoryInterface*>(o);
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                if (p != 0) {
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                    foreach (QString const &key, p->keys())
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                        m_instances.insertMulti(key, o);
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                }
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            }
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        }
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    } else {
5
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        foreach (const QString &plugin, availablePlugins()) {
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            QPluginLoader   loader(plugin);
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0
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            QObject *o = loader.instance();
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            if (o != 0 && o->qt_metacast(m_iid) != 0) {
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                QFactoryInterface* p = qobject_cast<QFactoryInterface*>(o);
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                if (p != 0) {
5
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                    foreach (const QString &key, p->keys())
0
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                        m_instances.insertMulti(key, o);
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                }
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                continue;
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            } else {
5
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                qWarning() << "QMediaPluginLoader: Failed to load plugin: " << plugin << loader.errorString();
0
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            }
5
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0
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            delete o;
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            loader.unload();
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        }
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    }
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}
5
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0
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QT_END_NAMESPACE
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   252