/*  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 <QUrl>

#include <QTimer>

#include <QWidget>

#include <coemain.h>    // for CCoeEnv

#include "abstractvideoplayer.h"

#include "utils.h"

#ifndef QT_NO_DEBUG

#include "objectdump.h"

#endif

QT_BEGIN_NAMESPACE

using namespace Phonon;

using namespace Phonon::MMF;

/*! \class MMF::AbstractVideoPlayer

  \internal

*/

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

// Constructor / destructor

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

MMF::AbstractVideoPlayer::AbstractVideoPlayer(MediaObject *parent, const AbstractPlayer *player)

    :   AbstractMediaPlayer(parent, player)

    ,   m_wsSession(CCoeEnv::Static()->WsSession())

    ,   m_screenDevice(*CCoeEnv::Static()->ScreenDevice())

    ,   m_window(0)

    ,   m_scaleWidth(1.0)

    ,   m_scaleHeight(1.0)

    ,   m_totalTime(0)

{

}

void MMF::AbstractVideoPlayer::construct()

{

    TRACE_CONTEXT(AbstractVideoPlayer::AbstractVideoPlayer, EVideoApi);

    TRACE_ENTRY_0();

    if (m_videoOutput) {

        initVideoOutput();

        m_window = m_videoOutput->videoWindow();

    }

    createPlayer();

    TRACE_EXIT_0();

}

MMF::AbstractVideoPlayer::~AbstractVideoPlayer()

{

    TRACE_CONTEXT(AbstractVideoPlayer::~AbstractVideoPlayer, EVideoApi);

    TRACE_ENTRY_0();

    // QObject destructor removes all signal-slot connections involving this

    // object, so we do not need to disconnect from m_videoOutput here.

    TRACE_EXIT_0();

}

CVideoPlayerUtility* MMF::AbstractVideoPlayer::nativePlayer() const

{

    return m_player.data();

}

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

// Public API

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

void MMF::AbstractVideoPlayer::doPlay()

{

    TRACE_CONTEXT(AbstractVideoPlayer::doPlay, EVideoApi);

    handlePendingParametersChanged();

    m_player->Play();

}

void MMF::AbstractVideoPlayer::doPause()

{

    TRACE_CONTEXT(AbstractVideoPlayer::doPause, EVideoApi);

    TRAPD(err, m_player->PauseL());

    if (KErrNone != err && state() != ErrorState) {

        TRACE("PauseL error %d", err);

        setError(tr("Pause failed"), err);

    }

}

void MMF::AbstractVideoPlayer::doStop()

{

    m_player->Stop();

}

void MMF::AbstractVideoPlayer::doSeek(qint64 ms)

{

    TRACE_CONTEXT(AbstractVideoPlayer::doSeek, EVideoApi);

    TRAPD(err, m_player->SetPositionL(TTimeIntervalMicroSeconds(ms * 1000)));

    if (KErrNone != err)

        setError(tr("Seek failed"), err);

}

int MMF::AbstractVideoPlayer::setDeviceVolume(int mmfVolume)

{

    TRAPD(err, m_player->SetVolumeL(mmfVolume));

    return err;

}

int MMF::AbstractVideoPlayer::openFile(RFile &file)

{

    TRAPD(err, m_player->OpenFileL(file));

    return err;

}

int MMF::AbstractVideoPlayer::openUrl(const QString &url)

{

    TRAPD(err, m_player->OpenUrlL(qt_QString2TPtrC(url)));

    return err;

}

int MMF::AbstractVideoPlayer::bufferStatus() const

{

    int result = 0;

    TRAP_IGNORE(m_player->GetVideoLoadingProgressL(result));

    return result;

}

void MMF::AbstractVideoPlayer::close()

{

    m_player->Close();

}

bool MMF::AbstractVideoPlayer::hasVideo() const

{

    return true;

}

qint64 MMF::AbstractVideoPlayer::currentTime() const

{

    TRACE_CONTEXT(AbstractVideoPlayer::currentTime, EVideoApi);

    TTimeIntervalMicroSeconds us;

    TRAPD(err, us = m_player->PositionL())

    qint64 result = 0;

    if (KErrNone == err) {

        result = toMilliSeconds(us);

    } else {

        TRACE("PositionL error %d", err);

        // If we don't cast away constness here, we simply have to ignore

        // the error.

        const_cast<AbstractVideoPlayer*>(this)->setError(tr("Getting position failed"), err);

    }

    return result;

}

qint64 MMF::AbstractVideoPlayer::totalTime() const

{

    return m_totalTime;

}

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

// Public slots

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

void MMF::AbstractVideoPlayer::videoWindowChanged()

{

    TRACE_ENTRY("state %d", state());

    m_window = m_videoOutput ? m_videoOutput->videoWindow() : 0;

    handleVideoWindowChanged();

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::aspectRatioChanged()

{

    TRACE_CONTEXT(AbstractVideoPlayer::aspectRatioChanged, EVideoInternal);

    TRACE_ENTRY("state %d aspectRatio %d", state());

    updateScaleFactors(m_videoOutput->videoWindowSize());

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::scaleModeChanged()

{

    TRACE_CONTEXT(AbstractVideoPlayer::scaleModeChanged, EVideoInternal);

    TRACE_ENTRY("state %d", state());

    updateScaleFactors(m_videoOutput->videoWindowSize());

    TRACE_EXIT_0();

}

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

// MVideoPlayerUtilityObserver callbacks

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

void MMF::AbstractVideoPlayer::MvpuoOpenComplete(TInt aError)

{

    TRACE_CONTEXT(AbstractVideoPlayer::MvpuoOpenComplete, EVideoApi);

    TRACE_ENTRY("state %d error %d", state(), aError);

    __ASSERT_ALWAYS(LoadingState == state(), Utils::panic(InvalidStatePanic));

    if (KErrNone == aError)

        m_player->Prepare();

    else

        setError(tr("Opening clip failed"), aError);

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::MvpuoPrepareComplete(TInt aError)

{

    TRACE_CONTEXT(AbstractVideoPlayer::MvpuoPrepareComplete, EVideoApi);

    TRACE_ENTRY("state %d error %d", state(), aError);

    __ASSERT_ALWAYS(LoadingState == state(), Utils::panic(InvalidStatePanic));

    TRAPD(err, getVideoClipParametersL(aError));

    if (KErrNone == err) {

        maxVolumeChanged(m_player->MaxVolume());

        if (m_videoOutput)

            m_videoOutput->setVideoSize(m_videoFrameSize);

        prepareCompleted();

        handlePendingParametersChanged();

        emit totalTimeChanged(totalTime());

    }

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::getVideoClipParametersL(TInt aError)

{

    User::LeaveIfError(aError);

    // Get frame size

    TSize size;

    m_player->VideoFrameSizeL(size);

    m_videoFrameSize = QSize(size.iWidth, size.iHeight);

    // Get duration

    m_totalTime = toMilliSeconds(m_player->DurationL());

}

void MMF::AbstractVideoPlayer::MvpuoFrameReady(CFbsBitmap &aFrame, TInt aError)

{

    TRACE_CONTEXT(AbstractVideoPlayer::MvpuoFrameReady, EVideoApi);

    TRACE_ENTRY("state %d error %d", state(), aError);

    Q_UNUSED(aFrame);

    Q_UNUSED(aError);   // suppress warnings in release builds

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::MvpuoPlayComplete(TInt aError)

{

    TRACE_CONTEXT(AbstractVideoPlayer::MvpuoPlayComplete, EVideoApi)

    TRACE_ENTRY("state %d error %d", state(), aError);

    // Call base class function which handles end of playback for both

    // audio and video clips.

    playbackComplete(aError);

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::MvpuoEvent(const TMMFEvent &aEvent)

{

    TRACE_CONTEXT(AbstractVideoPlayer::MvpuoEvent, EVideoApi);

    TRACE_ENTRY("state %d", state());

    Q_UNUSED(aEvent);

    TRACE_EXIT_0();

}

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

// MVideoLoadingObserver callbacks

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

void MMF::AbstractVideoPlayer::MvloLoadingStarted()

{

    bufferingStarted();

}

void MMF::AbstractVideoPlayer::MvloLoadingComplete()

{

    bufferingComplete();

}

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

// Video window updates

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

void MMF::AbstractVideoPlayer::videoOutputChanged()

{

    TRACE_CONTEXT(AbstractVideoPlayer::videoOutputChanged, EVideoInternal);

    TRACE_ENTRY_0();

    if (m_videoOutput)

        initVideoOutput();

    videoWindowChanged();

    TRACE_EXIT_0();

}

void MMF::AbstractVideoPlayer::initVideoOutput()

{

    bool connected = connect(

        m_videoOutput, SIGNAL(videoWindowChanged()),

        this, SLOT(videoWindowChanged())

    );

    Q_ASSERT(connected);

    connected = connect(

        m_videoOutput, SIGNAL(aspectRatioChanged()),

        this, SLOT(aspectRatioChanged())

    );

    Q_ASSERT(connected);

    connected = connect(

        m_videoOutput, SIGNAL(scaleModeChanged()),

        this, SLOT(scaleModeChanged())

    );

    Q_ASSERT(connected);

    // Suppress warnings in release builds

    Q_UNUSED(connected);

    // Do these after all connections are complete, to ensure

    // that any signals generated get to their destinations.

    m_videoOutput->winId();

    m_videoOutput->setVideoSize(m_videoFrameSize);

}

// Helper function for aspect ratio / scale mode handling

QSize scaleToAspect(const QSize &srcRect, int aspectWidth, int aspectHeight)

{

    const qreal aspectRatio = qreal(aspectWidth) / aspectHeight;

    int width = srcRect.width();

    int height = srcRect.width() / aspectRatio;

    if (height > srcRect.height()){

        height = srcRect.height();

        width = srcRect.height() * aspectRatio;

    }

    return QSize(width, height);

}

void MMF::AbstractVideoPlayer::updateScaleFactors(const QSize &windowSize, bool apply)

{

    if (m_videoFrameSize.isValid()) {

        QRect videoRect;

        // Calculate size of smallest rect which contains video frame size

        // and conforms to aspect ratio

        switch (m_videoOutput->aspectRatio()) {

        case Phonon::VideoWidget::AspectRatioAuto:

            videoRect.setSize(m_videoFrameSize);

            break;

        case Phonon::VideoWidget::AspectRatioWidget:

            videoRect.setSize(windowSize);

            break;

        case Phonon::VideoWidget::AspectRatio4_3:

            videoRect.setSize(scaleToAspect(m_videoFrameSize, 4, 3));

            break;

        case Phonon::VideoWidget::AspectRatio16_9:

            videoRect.setSize(scaleToAspect(m_videoFrameSize, 16, 9));

            break;

        }

        // Scale to fill the window width

        const int windowWidth = windowSize.width();

        const int windowHeight = windowSize.height();

        const qreal windowScaleFactor = qreal(windowWidth) / videoRect.width();

        int videoWidth = windowWidth;

        int videoHeight = videoRect.height() * windowScaleFactor;

        const qreal windowToVideoHeightRatio = qreal(windowHeight) / videoHeight;

        switch (m_videoOutput->scaleMode()) {

        case Phonon::VideoWidget::ScaleAndCrop:

            if (videoHeight < windowHeight) {

                videoWidth *= windowToVideoHeightRatio;

                videoHeight = windowHeight;

            }

            break;

        case Phonon::VideoWidget::FitInView:

        default:

            if (videoHeight > windowHeight) {

                videoWidth *= windowToVideoHeightRatio;

                videoHeight = windowHeight;

            }

            break;

        }

        // Calculate scale factors

        m_scaleWidth = 100.0f * videoWidth / m_videoFrameSize.width();

        m_scaleHeight = 100.0f * videoHeight / m_videoFrameSize.height();

        if (apply)

            parametersChanged(ScaleFactors);

    }

}

void MMF::AbstractVideoPlayer::parametersChanged(VideoParameters parameters)

{

    if (state() == LoadingState)

        m_pendingChanges |= parameters;

    else

        handleParametersChanged(parameters);

}

void MMF::AbstractVideoPlayer::handlePendingParametersChanged()

{

    if (m_pendingChanges)

        handleParametersChanged(m_pendingChanges);

    m_pendingChanges = 0;

}

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

// Metadata

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

int MMF::AbstractVideoPlayer::numberOfMetaDataEntries() const

{

    int numberOfEntries = 0;

    TRAP_IGNORE(numberOfEntries = m_player->NumberOfMetaDataEntriesL());

    return numberOfEntries;

}

QPair<QString, QString> MMF::AbstractVideoPlayer::metaDataEntry(int index) const

{

    CMMFMetaDataEntry *entry = 0;

    QT_TRAP_THROWING(entry = m_player->MetaDataEntryL(index));

    return QPair<QString, QString>(qt_TDesC2QString(entry->Name()), qt_TDesC2QString(entry->Value()));

}

QT_END_NAMESPACE