/*  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 "abstractplayer.h"
#include "defs.h"
#include "utils.h"

QT_BEGIN_NAMESPACE

using namespace Phonon;
using namespace Phonon::MMF;

/*! \class MMF::AbstractPlayer
  \internal
*/

//-----------------------------------------------------------------------------
// Constructor / destructor
//-----------------------------------------------------------------------------

MMF::AbstractPlayer::AbstractPlayer(const AbstractPlayer *player)
        :   m_videoOutput(0)
        ,   m_volume(InitialVolume)
        ,   m_state(GroundState)
        ,   m_error(NoError)
        ,   m_tickInterval(DefaultTickInterval)
        ,   m_transitionTime(0)
        ,   m_prefinishMark(0)
{
    if(player) {
        m_videoOutput = player->m_videoOutput;
        m_volume = player->m_volume;
        m_tickInterval = player->m_tickInterval;
        m_transitionTime = player->m_transitionTime;
        m_prefinishMark = player->m_prefinishMark;

        // This is to prevent unwanted state transitions occurring as a result
        // of MediaObject::switchToNextSource() during playlist playback.
        if (StoppedState == player->m_state)
            m_state = player->m_state;
    }
}

//-----------------------------------------------------------------------------
// MediaObjectInterface
//-----------------------------------------------------------------------------

qint32 MMF::AbstractPlayer::tickInterval() const
{
    return m_tickInterval;
}

void MMF::AbstractPlayer::setTickInterval(qint32 interval)
{
    m_tickInterval = interval;
    doSetTickInterval(interval);
}

qint32 MMF::AbstractPlayer::prefinishMark() const
{
    return m_prefinishMark;
}

void MMF::AbstractPlayer::setPrefinishMark(qint32 mark)
{
    m_prefinishMark = mark;
}

qint32 MMF::AbstractPlayer::transitionTime() const
{
    return m_transitionTime;
}

void MMF::AbstractPlayer::setTransitionTime(qint32 time)
{
    m_transitionTime = time;
}

void MMF::AbstractPlayer::volumeChanged(qreal volume)
{
    m_volume = volume;
}


//-----------------------------------------------------------------------------
// Video output
//-----------------------------------------------------------------------------

void MMF::AbstractPlayer::setVideoOutput(AbstractVideoOutput* videoOutput)
{
    m_videoOutput = videoOutput;
    videoOutputChanged();
}

void MMF::AbstractPlayer::videoOutputChanged()
{
    // Default behaviour is empty - overridden by VideoPlayer
}

void MMF::AbstractPlayer::setError(const QString &errorMessage)
{
    TRACE_CONTEXT(AbstractPlayer::setError, EAudioInternal);
    TRACE_ENTRY("state %d", m_state);

    m_error = Phonon::NormalError;
    m_errorString = errorMessage;
    changeState(ErrorState);

    TRACE_EXIT_0();
}

void MMF::AbstractPlayer::setError(const QString &errorMessage, int symbianError)
{
    setError(errorMessage + ": " + Utils::symbianErrorToString(symbianError));
}

Phonon::ErrorType MMF::AbstractPlayer::errorType() const
{
    const Phonon::ErrorType result = (ErrorState == m_state)
                                     ? m_error : NoError;
    return result;
}

QString MMF::AbstractPlayer::errorString() const
{
    return m_errorString;
}

Phonon::State MMF::AbstractPlayer::phononState() const
{
    return phononState(m_state);
}

Phonon::State MMF::AbstractPlayer::phononState(PrivateState state) const
{
    const Phonon::State phononState =
        GroundState == state
        ?    Phonon::LoadingState
        :    static_cast<Phonon::State>(state);

    return phononState;
}

AbstractPlayer::PrivateState AbstractPlayer::privateState() const
{
    return m_state;
}

Phonon::State MMF::AbstractPlayer::state() const
{
    return phononState(m_state);
}

void MMF::AbstractPlayer::setState(PrivateState newState)
{
    m_state = newState;
}

void MMF::AbstractPlayer::changeState(PrivateState newState)
{
    TRACE_CONTEXT(AbstractPlayer::changeState, EAudioInternal);
    TRACE_ENTRY("state %d newState %d", privateState(), newState);

    // TODO: add some invariants to check that the transition is valid

    const Phonon::State oldPhononState = phononState(privateState());

    // We need to change the state before we emit stateChanged(), because
    // some user code, for instance the mediaplayer, switch on MediaObject's
    // state.
    setState(newState);

    const Phonon::State newPhononState = phononState(newState);

    if (oldPhononState != newPhononState) {
        TRACE("emit stateChanged(%d, %d)", newPhononState, oldPhononState);
        emit stateChanged(newPhononState, oldPhononState);
    }

    TRACE_EXIT_0();
}

QT_END_NAMESPACE