/****************************************************************************

**

** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

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** This file is part of the QtMultimedia module of the Qt Toolkit.

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** This file contains pre-release code and may not be distributed.

** You may use this file in accordance with the terms and conditions

** contained in the Technology Preview License Agreement accompanying

** this package.

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** GNU Lesser General Public License Usage

** Alternatively, 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

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** $QT_END_LICENSE$

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****************************************************************************/

#include <QtCore/qdebug.h>

#include <QtMultimedia/qaudioengine.h>

#include <QtMultimedia/qaudioengineplugin.h>

#include <private/qfactoryloader_p.h>

#include "qaudiodevicefactory_p.h"

#ifndef QT_NO_AUDIO_BACKEND

#if defined(Q_OS_WIN)

#include "qaudiodeviceinfo_win32_p.h"

#include "qaudiooutput_win32_p.h"

#include "qaudioinput_win32_p.h"

#elif defined(Q_OS_MAC)

#include "qaudiodeviceinfo_mac_p.h"

#include "qaudiooutput_mac_p.h"

#include "qaudioinput_mac_p.h"

#elif defined(HAS_ALSA)

#include "qaudiodeviceinfo_alsa_p.h"

#include "qaudiooutput_alsa_p.h"

#include "qaudioinput_alsa_p.h"

#endif

#endif

QT_BEGIN_NAMESPACE

Q_GLOBAL_STATIC_WITH_ARGS(QFactoryLoader, loader,

        (QAudioEngineFactoryInterface_iid, QLatin1String("/audio"), Qt::CaseInsensitive))

class QNullDeviceInfo : public QAbstractAudioDeviceInfo

{

public:

    QAudioFormat preferredFormat() const { qWarning()<<"using null deviceinfo, none available"; return QAudioFormat(); }

    bool isFormatSupported(const QAudioFormat& ) const { return false; }

    QAudioFormat nearestFormat(const QAudioFormat& ) const { return QAudioFormat(); }

    QString deviceName() const { return QString(); }

    QStringList codecList() { return QStringList(); }

    QList<int> frequencyList()  { return QList<int>(); }

    QList<int> channelsList() { return QList<int>(); }

    QList<int> sampleSizeList() { return QList<int>(); }

    QList<QAudioFormat::Endian> byteOrderList() { return QList<QAudioFormat::Endian>(); }

    QList<QAudioFormat::SampleType> sampleTypeList() { return QList<QAudioFormat::SampleType>(); }

};

class QNullInputDevice : public QAbstractAudioInput

{

public:

    QIODevice* start(QIODevice* ) { qWarning()<<"using null input device, none available"; return 0; }

    void stop() {}

    void reset() {}

    void suspend() {}

    void resume() {}

    int bytesReady() const { return 0; }

    int periodSize() const { return 0; }

    void setBufferSize(int ) {}

    int bufferSize() const  { return 0; }

    void setNotifyInterval(int ) {}

    int notifyInterval() const { return 0; }

    qint64 processedUSecs() const { return 0; }

    qint64 elapsedUSecs() const { return 0; }

    QAudio::Error error() const { return QAudio::OpenError; }

    QAudio::State state() const { return QAudio::StoppedState; }

    QAudioFormat format() const { return QAudioFormat(); }

};

class QNullOutputDevice : public QAbstractAudioOutput

{

public:

    QIODevice* start(QIODevice* ) { qWarning()<<"using null output device, none available"; return 0; }

    void stop() {}

    void reset() {}

    void suspend() {}

    void resume() {}

    int bytesFree() const { return 0; }

    int periodSize() const { return 0; }

    void setBufferSize(int ) {}

    int bufferSize() const  { return 0; }

    void setNotifyInterval(int ) {}

    int notifyInterval() const { return 0; }

    qint64 processedUSecs() const { return 0; }

    qint64 elapsedUSecs() const { return 0; }

    QAudio::Error error() const { return QAudio::OpenError; }

    QAudio::State state() const { return QAudio::StoppedState; }

    QAudioFormat format() const { return QAudioFormat(); }

};

QList<QAudioDeviceInfo> QAudioDeviceFactory::availableDevices(QAudio::Mode mode)

{

    QList<QAudioDeviceInfo> devices;

#ifndef QT_NO_AUDIO_BACKEND

    foreach (const QByteArray &handle, QAudioDeviceInfoInternal::availableDevices(mode))

        devices << QAudioDeviceInfo(QLatin1String("builtin"), handle, mode);

#endif

#endif

    QFactoryLoader* l = loader();

    foreach (QString const& key, l->keys()) {

        QAudioEngineFactoryInterface* plugin = qobject_cast<QAudioEngineFactoryInterface*>(l->instance(key));

        if (plugin) {

            foreach (QByteArray const& handle, plugin->availableDevices(mode))

                devices << QAudioDeviceInfo(key, handle, mode);

        }

        delete plugin;

    }

    return devices;

}

QAudioDeviceInfo QAudioDeviceFactory::defaultInputDevice()

{

    QAudioEngineFactoryInterface* plugin = qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(QLatin1String("default")));

    if (plugin) {

        QList<QByteArray> list = plugin->availableDevices(QAudio::AudioInput);

        if (list.size() > 0)

            return QAudioDeviceInfo(QLatin1String("default"), list.at(0), QAudio::AudioInput);

    }

#ifndef QT_NO_AUDIO_BACKEND

    return QAudioDeviceInfo(QLatin1String("builtin"), QAudioDeviceInfoInternal::defaultInputDevice(), QAudio::AudioInput);

#endif

#endif

    return QAudioDeviceInfo();

}

QAudioDeviceInfo QAudioDeviceFactory::defaultOutputDevice()

{

    QAudioEngineFactoryInterface* plugin = qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(QLatin1String("default")));

    if (plugin) {

        QList<QByteArray> list = plugin->availableDevices(QAudio::AudioOutput);

        if (list.size() > 0)

            return QAudioDeviceInfo(QLatin1String("default"), list.at(0), QAudio::AudioOutput);

    }

#ifndef QT_NO_AUDIO_BACKEND

    return QAudioDeviceInfo(QLatin1String("builtin"), QAudioDeviceInfoInternal::defaultOutputDevice(), QAudio::AudioOutput);

#endif

#endif

    return QAudioDeviceInfo();

}

QAbstractAudioDeviceInfo* QAudioDeviceFactory::audioDeviceInfo(const QString &realm, const QByteArray &handle, QAudio::Mode mode)

{

    QAbstractAudioDeviceInfo *rc = 0;

#ifndef QT_NO_AUDIO_BACKEND

    if (realm == QLatin1String("builtin"))

        return new QAudioDeviceInfoInternal(handle, mode);

#endif

#endif

    QAudioEngineFactoryInterface* plugin =

        qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(realm));

    if (plugin)

        rc = plugin->createDeviceInfo(handle, mode);

    return rc == 0 ? new QNullDeviceInfo() : rc;

}

QAbstractAudioInput* QAudioDeviceFactory::createDefaultInputDevice(QAudioFormat const &format)

{

    return createInputDevice(defaultInputDevice(), format);

}

QAbstractAudioOutput* QAudioDeviceFactory::createDefaultOutputDevice(QAudioFormat const &format)

{

    return createOutputDevice(defaultOutputDevice(), format);

}

QAbstractAudioInput* QAudioDeviceFactory::createInputDevice(QAudioDeviceInfo const& deviceInfo, QAudioFormat const &format)

{

    if (deviceInfo.isNull())

        return new QNullInputDevice();

#ifndef QT_NO_AUDIO_BACKEND

    if (deviceInfo.realm() == QLatin1String("builtin"))

        return new QAudioInputPrivate(deviceInfo.handle(), format);

#endif

#endif

    QAudioEngineFactoryInterface* plugin =

        qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(deviceInfo.realm()));

    if (plugin)

        return plugin->createInput(deviceInfo.handle(), format);

    return new QNullInputDevice();

}

QAbstractAudioOutput* QAudioDeviceFactory::createOutputDevice(QAudioDeviceInfo const& deviceInfo, QAudioFormat const &format)

{

    if (deviceInfo.isNull())

        return new QNullOutputDevice();

#ifndef QT_NO_AUDIO_BACKEND

    if (deviceInfo.realm() == QLatin1String("builtin"))

        return new QAudioOutputPrivate(deviceInfo.handle(), format);

#endif

#endif

    QAudioEngineFactoryInterface* plugin =

        qobject_cast<QAudioEngineFactoryInterface*>(loader()->instance(deviceInfo.realm()));

    if (plugin)

        return plugin->createOutput(deviceInfo.handle(), format);

    return new QNullOutputDevice();

}

QT_END_NAMESPACE