src/multimedia/audio/qaudiodevicefactory.cpp
author Alex Gilkes <alex.gilkes@nokia.com>
Mon, 11 Jan 2010 14:00:40 +0000
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/****************************************************************************
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**
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** Copyright (C) 2009 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 QtMultimedia module of the Qt Toolkit.
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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 <QtCore/qdebug.h>
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#include <QtMultimedia/qaudioengine.h>
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#include <QtMultimedia/qaudioengineplugin.h>
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#include <private/qfactoryloader_p.h>
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#include "qaudiodevicefactory_p.h"
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#if defined(Q_OS_WIN)
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#include "qaudiodeviceinfo_win32_p.h"
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#include "qaudiooutput_win32_p.h"
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#include "qaudioinput_win32_p.h"
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#elif defined(Q_OS_MAC)
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#include "qaudiodeviceinfo_mac_p.h"
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#include "qaudiooutput_mac_p.h"
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#include "qaudioinput_mac_p.h"
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#elif defined(HAS_ALSA)
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#include "qaudiodeviceinfo_alsa_p.h"
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#include "qaudiooutput_alsa_p.h"
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#include "qaudioinput_alsa_p.h"
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#endif
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QT_BEGIN_NAMESPACE
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Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,
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        (QAudioEngineFactoryInterface_iid, QLatin1String("/audio"), Qt::CaseInsensitive))
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class QNullDeviceInfo : public QAbstractAudioDeviceInfo
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{
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public:
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    QAudioFormat preferredFormat() const { qWarning()<<"using null deviceinfo, none available"; return QAudioFormat(); }
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    bool isFormatSupported(const QAudioFormat& ) const { return false; }
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    QAudioFormat nearestFormat(const QAudioFormat& ) const { return QAudioFormat(); }
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    QString deviceName() const { return QString(); }
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    QStringList codecList() { return QStringList(); }
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    QList<int> frequencyList()  { return QList<int>(); }
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    QList<int> channelsList() { return QList<int>(); }
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    QList<int> sampleSizeList() { return QList<int>(); }
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    QList<QAudioFormat::Endian> byteOrderList() { return QList<QAudioFormat::Endian>(); }
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    QList<QAudioFormat::SampleType> sampleTypeList() { return QList<QAudioFormat::SampleType>(); }
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};
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class QNullInputDevice : public QAbstractAudioInput
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{
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public:
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    QIODevice* start(QIODevice* ) { qWarning()<<"using null input device, none available"; return 0; }
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    void stop() {}
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    void reset() {}
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    void suspend() {}
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    void resume() {}
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    int bytesReady() const { return 0; }
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    int periodSize() const { return 0; }
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    void setBufferSize(int ) {}
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    int bufferSize() const  { return 0; }
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    void setNotifyInterval(int ) {}
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    int notifyInterval() const { return 0; }
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    qint64 totalTime() const { return 0; }
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    qint64 clock() const { return 0; }
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    QAudio::Error error() const { return QAudio::OpenError; }
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    QAudio::State state() const { return QAudio::StopState; }
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    QAudioFormat format() const { return QAudioFormat(); }
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};
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class QNullOutputDevice : public QAbstractAudioOutput
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{
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public:
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    QIODevice* start(QIODevice* ) { qWarning()<<"using null output device, none available"; return 0; }
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    void stop() {}
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    void reset() {}
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    void suspend() {}
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    void resume() {}
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    int bytesFree() const { return 0; }
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    int periodSize() const { return 0; }
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    void setBufferSize(int ) {}
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    int bufferSize() const  { return 0; }
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    void setNotifyInterval(int ) {}
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    int notifyInterval() const { return 0; }
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    qint64 totalTime() const { return 0; }
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    qint64 clock() const { return 0; }
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    QAudio::Error error() const { return QAudio::OpenError; }
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    QAudio::State state() const { return QAudio::StopState; }
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    QAudioFormat format() const { return QAudioFormat(); }
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};
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QList<QAudioDeviceInfo> QAudioDeviceFactory::deviceList(QAudio::Mode mode)
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{
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    QList<QAudioDeviceInfo> devices;
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#if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
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    foreach (const QByteArray &handle, QAudioDeviceInfoInternal::deviceList(mode))
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        devices << QAudioDeviceInfo(QLatin1String("builtin"), handle, mode);
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#endif
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    QFactoryLoader* l = loader();
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    foreach (QString const& key, l->keys()) {
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        QAudioEngineFactoryInterface* plugin = qobject_cast<QAudioEngineFactoryInterface*>(l->instance(key));
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        if (plugin) {
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            foreach (QByteArray const& handle, plugin->deviceList(mode))
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                devices << QAudioDeviceInfo(key, handle, mode);
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        }
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        delete plugin;
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    }
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    return devices;
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}
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QAudioDeviceInfo QAudioDeviceFactory::defaultInputDevice()
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{
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    QAudioEngineFactoryInterface* plugin = qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(QLatin1String("default")));
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    if (plugin) {
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        QList<QByteArray> list = plugin->deviceList(QAudio::AudioInput);
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        if (list.size() > 0)
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            return QAudioDeviceInfo(QLatin1String("default"), list.at(0), QAudio::AudioInput);
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    }
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#if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
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    return QAudioDeviceInfo(QLatin1String("builtin"), QAudioDeviceInfoInternal::defaultInputDevice(), QAudio::AudioInput);
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#endif
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    return QAudioDeviceInfo();
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}
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QAudioDeviceInfo QAudioDeviceFactory::defaultOutputDevice()
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{
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    QAudioEngineFactoryInterface* plugin = qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(QLatin1String("default")));
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    if (plugin) {
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        QList<QByteArray> list = plugin->deviceList(QAudio::AudioOutput);
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        if (list.size() > 0)
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            return QAudioDeviceInfo(QLatin1String("default"), list.at(0), QAudio::AudioOutput);
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    }
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#if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
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    return QAudioDeviceInfo(QLatin1String("builtin"), QAudioDeviceInfoInternal::defaultOutputDevice(), QAudio::AudioOutput);
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#endif
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    return QAudioDeviceInfo();
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}
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QAbstractAudioDeviceInfo* QAudioDeviceFactory::audioDeviceInfo(const QString &realm, const QByteArray &handle, QAudio::Mode mode)
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{
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    QAbstractAudioDeviceInfo *rc = 0;
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#if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
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    if (realm == QLatin1String("builtin"))
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        return new QAudioDeviceInfoInternal(handle, mode);
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#endif
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    QAudioEngineFactoryInterface* plugin =
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        qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(realm));
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    if (plugin)
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        rc = plugin->createDeviceInfo(handle, mode);
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    return rc == 0 ? new QNullDeviceInfo() : rc;
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}
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QAbstractAudioInput* QAudioDeviceFactory::createDefaultInputDevice(QAudioFormat const &format)
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{
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    return createInputDevice(defaultInputDevice(), format);
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}
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QAbstractAudioOutput* QAudioDeviceFactory::createDefaultOutputDevice(QAudioFormat const &format)
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{
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    return createOutputDevice(defaultOutputDevice(), format);
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}
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QAbstractAudioInput* QAudioDeviceFactory::createInputDevice(QAudioDeviceInfo const& deviceInfo, QAudioFormat const &format)
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{
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    if (deviceInfo.isNull())
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        return new QNullInputDevice();
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#if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
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    if (deviceInfo.realm() == QLatin1String("builtin"))
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        return new QAudioInputPrivate(deviceInfo.handle(), format);
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#endif
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    QAudioEngineFactoryInterface* plugin =
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        qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(deviceInfo.realm()));
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    if (plugin)
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        return plugin->createInput(deviceInfo.handle(), format);
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    return new QNullInputDevice();
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}
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QAbstractAudioOutput* QAudioDeviceFactory::createOutputDevice(QAudioDeviceInfo const& deviceInfo, QAudioFormat const &format)
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{
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    if (deviceInfo.isNull())
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        return new QNullOutputDevice();
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#if (defined(Q_OS_WIN) || defined(Q_OS_MAC) || defined(HAS_ALSA))
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    if (deviceInfo.realm() == QLatin1String("builtin"))
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        return new QAudioOutputPrivate(deviceInfo.handle(), format);
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#endif
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    QAudioEngineFactoryInterface* plugin =
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        qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(deviceInfo.realm()));
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    if (plugin)
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        return plugin->createOutput(deviceInfo.handle(), format);
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    return new QNullOutputDevice();
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}
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QT_END_NAMESPACE
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