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****************************************************************************/

#include "qgstreamermetadataprovider.h"

#include "qgstreamerplayersession.h"

#include <QDebug>

#include <gst/gstversion.h>

struct QGstreamerMetaDataKeyLookup

{

    QtMultimediaKit::MetaData key;

    const char *token;

};

static const QGstreamerMetaDataKeyLookup qt_gstreamerMetaDataKeys[] =

{

    { QtMultimediaKit::Title, GST_TAG_TITLE },

    //{ QtMultimediaKit::SubTitle, 0 },

    //{ QtMultimediaKit::Author, 0 },

    { QtMultimediaKit::Comment, GST_TAG_COMMENT },

    { QtMultimediaKit::Description, GST_TAG_DESCRIPTION },

    //{ QtMultimediaKit::Category, 0 },

    { QtMultimediaKit::Genre, GST_TAG_GENRE },

    { QtMultimediaKit::Year, "year" },

    //{ QtMultimediaKit::UserRating, 0 },

    { QtMultimediaKit::Language, GST_TAG_LANGUAGE_CODE },

    { QtMultimediaKit::Publisher, GST_TAG_ORGANIZATION },

    { QtMultimediaKit::Copyright, GST_TAG_COPYRIGHT },

    //{ QtMultimediaKit::ParentalRating, 0 },

    //{ QtMultimediaKit::RatingOrganisation, 0 },

    // Media

    //{ QtMultimediaKit::Size, 0 },

    //{ QtMultimediaKit::MediaType, 0 },

    { QtMultimediaKit::Duration, GST_TAG_DURATION },

    // Audio

    { QtMultimediaKit::AudioBitRate, GST_TAG_BITRATE },

    { QtMultimediaKit::AudioCodec, GST_TAG_AUDIO_CODEC },

    //{ QtMultimediaKit::ChannelCount, 0 },

    //{ QtMultimediaKit::SampleRate, 0 },

    // Music

    { QtMultimediaKit::AlbumTitle, GST_TAG_ALBUM },

    { QtMultimediaKit::AlbumArtist,  GST_TAG_ARTIST},

    { QtMultimediaKit::ContributingArtist, GST_TAG_PERFORMER },

#if (GST_VERSION_MAJOR >= 0) && (GST_VERSION_MINOR >= 10) && (GST_VERSION_MICRO >= 19)

    { QtMultimediaKit::Composer, GST_TAG_COMPOSER },

#endif

    //{ QtMultimediaKit::Conductor, 0 },

    //{ QtMultimediaKit::Lyrics, 0 },

    //{ QtMultimediaKit::Mood, 0 },

    { QtMultimediaKit::TrackNumber, GST_TAG_TRACK_NUMBER },

    //{ QtMultimediaKit::CoverArtUrlSmall, 0 },

    //{ QtMultimediaKit::CoverArtUrlLarge, 0 },

    // Image/Video

    //{ QtMultimediaKit::Resolution, 0 },

    //{ QtMultimediaKit::PixelAspectRatio, 0 },

    // Video

    //{ QtMultimediaKit::VideoFrameRate, 0 },

    //{ QtMultimediaKit::VideoBitRate, 0 },

    { QtMultimediaKit::VideoCodec, GST_TAG_VIDEO_CODEC },

    //{ QtMultimediaKit::PosterUrl, 0 },

    // Movie

    //{ QtMultimediaKit::ChapterNumber, 0 },

    //{ QtMultimediaKit::Director, 0 },

    { QtMultimediaKit::LeadPerformer, GST_TAG_PERFORMER },

    //{ QtMultimediaKit::Writer, 0 },

    // Photos

    //{ QtMultimediaKit::CameraManufacturer, 0 },

    //{ QtMultimediaKit::CameraModel, 0 },

    //{ QtMultimediaKit::Event, 0 },

    //{ QtMultimediaKit::Subject, 0 }

};

QGstreamerMetaDataProvider::QGstreamerMetaDataProvider(QGstreamerPlayerSession *session, QObject *parent)

    :QMetaDataReaderControl(parent), m_session(session)

{

    connect(m_session, SIGNAL(tagsChanged()), SLOT(updateTags()));

}

QGstreamerMetaDataProvider::~QGstreamerMetaDataProvider()

{

}

bool QGstreamerMetaDataProvider::isMetaDataAvailable() const

{

    return !m_session->tags().isEmpty();

}

bool QGstreamerMetaDataProvider::isWritable() const

{

    return false;

}

QVariant QGstreamerMetaDataProvider::metaData(QtMultimediaKit::MetaData key) const

{

    static const int count = sizeof(qt_gstreamerMetaDataKeys) / sizeof(QGstreamerMetaDataKeyLookup);

    for (int i = 0; i < count; ++i) {

        if (qt_gstreamerMetaDataKeys[i].key == key) {

            return m_session->tags().value(QByteArray(qt_gstreamerMetaDataKeys[i].token));

        }

    }

    return QVariant();

}

QList<QtMultimediaKit::MetaData> QGstreamerMetaDataProvider::availableMetaData() const

{

    static QMap<QByteArray, QtMultimediaKit::MetaData> keysMap;

    if (keysMap.isEmpty()) {

        const int count = sizeof(qt_gstreamerMetaDataKeys) / sizeof(QGstreamerMetaDataKeyLookup);

        for (int i = 0; i < count; ++i) {

            keysMap[QByteArray(qt_gstreamerMetaDataKeys[i].token)] = qt_gstreamerMetaDataKeys[i].key;

        }

    }

    QList<QtMultimediaKit::MetaData> res;

    foreach (const QByteArray &key, m_session->tags().keys()) {

        QtMultimediaKit::MetaData tag = keysMap.value(key, QtMultimediaKit::MetaData(-1));

        if (tag != -1)

            res.append(tag);

    }

    return res;

}

QVariant QGstreamerMetaDataProvider::extendedMetaData(const QString &key) const

{

    return m_session->tags().value(key.toLatin1());

}

QStringList QGstreamerMetaDataProvider::availableExtendedMetaData() const

{

    QStringList res;

    foreach (const QByteArray &key, m_session->tags().keys())

        res.append(QString(key));

    return res;

}

void QGstreamerMetaDataProvider::updateTags()

{

    emit metaDataChanged();

}