/*  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