/*  This file is part of the KDE project.

Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).

This library is free software: you can redistribute it and/or modify

it under the terms of the GNU Lesser General Public License as published by

the Free Software Foundation, either version 2.1 or 3 of the License.

This library is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License

along with this library.  If not, see <http://www.gnu.org/licenses/>.

*/

#include <e32debug.h>

#include <QCoreApplication>

#include "audiooutput.h"

#include "defs.h"

#include "mediaobject.h"

#include "utils.h"

#include "volumeobserver.h"

QT_BEGIN_NAMESPACE

using namespace Phonon;

using namespace Phonon::MMF;

/*! \class MMF::AudioOutput

  \internal

*/

//-----------------------------------------------------------------------------

// Constructor / destructor

//-----------------------------------------------------------------------------

MMF::AudioOutput::AudioOutput(Backend *, QObject *parent) : MediaNode(parent)

        , m_volume(InitialVolume)

        , m_observer(0)

{

}

//-----------------------------------------------------------------------------

// Public API

//-----------------------------------------------------------------------------

qreal MMF::AudioOutput::volume() const

{

    return m_volume;

}

void MMF::AudioOutput::setVolume(qreal volume)

{

    TRACE_CONTEXT(AudioOutput::setVolume, EAudioApi);

    TRACE_ENTRY("observer 0x%08x volume %f", m_observer, volume);

    if (volume != m_volume) {

        if (m_observer) {

            m_observer->volumeChanged(volume);

        }

        m_volume = volume;

        TRACE("emit volumeChanged(%f)", volume)

        emit volumeChanged(volume);

    }

    TRACE_EXIT_0();

}

int MMF::AudioOutput::outputDevice() const

{

    return AudioOutputDeviceID;

}

bool MMF::AudioOutput::setOutputDevice(int index)

{

    Q_ASSERT_X(index == AudioOutputDeviceID, Q_FUNC_INFO,

               "We only support one output device, with id 0");

    return true;

}

void MMF::AudioOutput::setVolumeObserver(VolumeObserver* observer)

{

    m_observer = observer;

    if (m_observer) {

        m_observer->volumeChanged(m_volume);

    }

}

bool MMF::AudioOutput::activateOnMediaObject(MediaObject *mo)

{

    setVolumeObserver(mo);

    return true;

}

QHash<QByteArray, QVariant> MMF::AudioOutput::audioOutputDescription(int index)

{

    QHash<QByteArray, QVariant> retval;

    if (index == AudioOutputDeviceID) {

        retval.insert("name", QCoreApplication::translate("Phonon::MMF", "Audio Output"));

        retval.insert("description", QCoreApplication::translate("Phonon::MMF", "The audio output device"));

        retval.insert("available", true);

    }

    return retval;

}

QT_END_NAMESPACE