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#include "qmediadevicemanager.h"
#include "private/qplatformmediaintegration_p.h"
#include "private/qplatformmediadevicemanager_p.h"

#include <qaudiodeviceinfo.h>
#include <qcamerainfo.h>

QT_BEGIN_NAMESPACE

class QMediaDeviceManagerPrivate
{
public:
    QMediaDeviceManagerPrivate()
        : manager(new QMediaDeviceManager)
    {
        pmanager = QPlatformMediaIntegration::instance()->deviceManager();
        pmanager->setDeviceManager(manager);
    }
    ~QMediaDeviceManagerPrivate()
    {
        delete manager;
        manager = nullptr;
    }

    QMediaDeviceManager *manager = nullptr;
    QPlatformMediaDeviceManager *pmanager = nullptr;

} priv;

/*!
    \class QMediaDeviceManager
    \brief The QMediaDeviceManager class provides information about available
    multimedia input and output devices.
    \ingroup multimedia
    \inmodule QtMultimedia

    The QMediaDeviceManager class helps in managing the available multimedia
    input and output devices. It manages three types of devices:
    \list
    \li Audio input devices (Microphones)
    \li Audio output devices (Speakers, Headsets)
    \li Video input devices (Cameras)
    \endlist

    QMediaDeviceManager allows listing all available devices and will emit
    signals when the list of available devices has changed.

    While using the default input and output devices is often sufficient for
    playing back or recording multimedia, there is often a need to explicitly
    select the device to be used.

    QMediaDeviceManager is a singleton object and all getters are thread-safe.
*/

/*!
    Returns the device manager instance.
*/
QMediaDeviceManager *QMediaDeviceManager::instance()
{
    return priv.manager;
}

QList<QAudioDeviceInfo> QMediaDeviceManager::audioInputs()
{
    return priv.pmanager->audioInputs();
}

QList<QAudioDeviceInfo> QMediaDeviceManager::audioOutputs()
{
    return priv.pmanager->audioOutputs();
}

/*!
    Returns a list of available cameras on the system which are located at \a position.

    If \a position is not specified or if the value is QCameraInfo::UnspecifiedPosition, a list of
    all available cameras will be returned.
*/
QList<QCameraInfo> QMediaDeviceManager::videoInputs()
{
    return priv.pmanager->videoInputs();
}

QAudioDeviceInfo QMediaDeviceManager::defaultAudioInput()
{
    const auto inputs = audioInputs();
    for (auto info : inputs)
        if (info.isDefault())
            return info;
    return inputs.value(0);
}

QAudioDeviceInfo QMediaDeviceManager::defaultAudioOutput()
{
    const auto outputs = audioOutputs();
    for (auto info : outputs)
        if (info.isDefault())
            return info;
    return outputs.value(0);
}

/*!
    Returns the default camera on the system.

    The returned object should be checked using isNull() before being used, in case there is no
    default camera or no cameras at all.

    \sa availableCameras()
*/
QCameraInfo QMediaDeviceManager::defaultVideoInput()
{
    const auto inputs = videoInputs();
    for (auto info : inputs)
        if (info.isDefault())
            return info;
    return inputs.value(0);
}

/*!
    \internal
*/
QMediaDeviceManager::QMediaDeviceManager() = default;

/*!
    \internal
*/
QMediaDeviceManager::~QMediaDeviceManager() = default;


QT_END_NAMESPACE

#include "moc_qmediadevicemanager.cpp"