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Diffstat (limited to 'src/multimedia/audio/qaudiopluginloader.cpp')
| -rw-r--r-- | src/multimedia/audio/qaudiopluginloader.cpp | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/src/multimedia/audio/qaudiopluginloader.cpp b/src/multimedia/audio/qaudiopluginloader.cpp new file mode 100644 index 000000000..58006356a --- /dev/null +++ b/src/multimedia/audio/qaudiopluginloader.cpp @@ -0,0 +1,176 @@ +/**************************************************************************** +** +** 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. +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qaudiosystemplugin.h" +#include "qaudiopluginloader_p.h" + +#include <QtCore/qcoreapplication.h> +#include <QtCore/qpluginloader.h> +#include <QtCore/qfactoryinterface.h> +#include <QtCore/qdir.h> +#include <QtCore/qdebug.h> + +QT_BEGIN_NAMESPACE + +QAudioPluginLoader::QAudioPluginLoader(const char *iid, const QString &location, Qt::CaseSensitivity): + m_iid(iid) +{ + m_location = location + QLatin1Char('/'); + load(); +} + +QAudioPluginLoader::~QAudioPluginLoader() +{ + for (int i = 0; i < m_plugins.count(); i++ ) { + delete m_plugins.at(i); + } +} + +QStringList QAudioPluginLoader::pluginList() const +{ +#if !defined QT_NO_DEBUG + const bool showDebug = qgetenv("QT_DEBUG_PLUGINS").toInt() > 0; +#endif + + QStringList paths = QCoreApplication::libraryPaths(); +#ifdef QTM_PLUGIN_PATH + paths << QLatin1String(QTM_PLUGIN_PATH); +#endif +#if !defined QT_NO_DEBUG + if (showDebug) + qDebug() << "Plugin paths:" << paths; +#endif + + //temp variable to avoid multiple identic path + QSet<QString> processed; + + /* Discover a bunch o plugins */ + QStringList plugins; + + /* Enumerate our plugin paths */ + for (int i=0; i < paths.count(); i++) { + if (processed.contains(paths.at(i))) + continue; + processed.insert(paths.at(i)); + QDir pluginsDir(paths.at(i)+m_location); + if (!pluginsDir.exists()) + continue; + + QStringList files = pluginsDir.entryList(QDir::Files); +#if !defined QT_NO_DEBUG + if (showDebug) + qDebug()<<"Looking for plugins in "<<pluginsDir.path()<<files; +#endif + for (int j=0; j < files.count(); j++) { + const QString &file = files.at(j); + plugins << pluginsDir.absoluteFilePath(file); + } + } + return plugins; +} + +QStringList QAudioPluginLoader::keys() const +{ + QMutexLocker locker(const_cast<QMutex *>(&m_mutex)); + + QStringList list; + for (int i = 0; i < m_plugins.count(); i++) { + QAudioSystemPlugin* p = qobject_cast<QAudioSystemPlugin*>(m_plugins.at(i)->instance()); + if (p) list << p->keys(); + } + + return list; +} + +QObject* QAudioPluginLoader::instance(QString const &key) +{ + QMutexLocker locker(&m_mutex); + + for (int i = 0; i < m_plugins.count(); i++) { + QAudioSystemPlugin* p = qobject_cast<QAudioSystemPlugin*>(m_plugins.at(i)->instance()); + if (p && p->keys().contains(key)) + return m_plugins.at(i)->instance(); + } + return 0; +} + +QList<QObject*> QAudioPluginLoader::instances(QString const &key) +{ + QMutexLocker locker(&m_mutex); + + QList<QObject*> list; + for (int i = 0; i < m_plugins.count(); i++) { + QAudioSystemPlugin* p = qobject_cast<QAudioSystemPlugin*>(m_plugins.at(i)->instance()); + if (p && p->keys().contains(key)) + list << m_plugins.at(i)->instance(); + } + return list; +} + +void QAudioPluginLoader::load() +{ + if (!m_plugins.isEmpty()) + return; + +#if !defined QT_NO_DEBUG + const bool showDebug = qgetenv("QT_DEBUG_PLUGINS").toInt() > 0; +#endif + + QStringList plugins = pluginList(); + for (int i=0; i < plugins.count(); i++) { + QPluginLoader* loader = new QPluginLoader(plugins.at(i)); + QObject *o = loader->instance(); + if (o != 0 && o->qt_metacast(m_iid) != 0) { + m_plugins.append(loader); + } else { +#if !defined QT_NO_DEBUG + if (showDebug) + qWarning() << "QAudioPluginLoader: Failed to load plugin: " + << plugins.at(i) << loader->errorString(); +#endif + delete o; + //we are not calling loader->unload here for it may cause problem on some device + delete loader; + } + } +} +QT_END_NAMESPACE + |