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** Public License version 3.0 as published by the Free Software Foundation
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****************************************************************************/

#include "camerabinmetadata.h"

#include <gst/gst.h>
#include <gst/gstversion.h>

struct QGstreamerMetaDataKeyLookup
{
    QString key;
    const char *token;
};

static const QGstreamerMetaDataKeyLookup qt_gstreamerMetaDataKeys[] =
{
    { QtMultimedia::MetaData::Title, GST_TAG_TITLE },
    //{ QtMultimedia::MetaData::SubTitle, 0 },
    //{ QtMultimedia::MetaData::Author, 0 },
    { QtMultimedia::MetaData::Comment, GST_TAG_COMMENT },
    { QtMultimedia::MetaData::Description, GST_TAG_DESCRIPTION },
    //{ QtMultimedia::MetaData::Category, 0 },
    { QtMultimedia::MetaData::Genre, GST_TAG_GENRE },
    //{ QtMultimedia::MetaData::Year, 0 },
    //{ QtMultimedia::MetaData::UserRating, 0 },

    { QtMultimedia::MetaData::Language, GST_TAG_LANGUAGE_CODE },

    { QtMultimedia::MetaData::Publisher, GST_TAG_ORGANIZATION },
    { QtMultimedia::MetaData::Copyright, GST_TAG_COPYRIGHT },
    //{ QtMultimedia::MetaData::ParentalRating, 0 },
    //{ QtMultimedia::MetaData::RatingOrganisation, 0 },

    // Media
    //{ QtMultimedia::MetaData::Size, 0 },
    //{ QtMultimedia::MetaData::MediaType, 0 },
    { QtMultimedia::MetaData::Duration, GST_TAG_DURATION },

    // Audio
    { QtMultimedia::MetaData::AudioBitRate, GST_TAG_BITRATE },
    { QtMultimedia::MetaData::AudioCodec, GST_TAG_AUDIO_CODEC },
    //{ QtMultimedia::MetaData::ChannelCount, 0 },
    //{ QtMultimedia::MetaData::SampleRate, 0 },

    // Music
    { QtMultimedia::MetaData::AlbumTitle, GST_TAG_ALBUM },
    { QtMultimedia::MetaData::AlbumArtist,  GST_TAG_ARTIST},
    { QtMultimedia::MetaData::ContributingArtist, GST_TAG_PERFORMER },
#if (GST_VERSION_MAJOR >= 0) && (GST_VERSION_MINOR >= 10) && (GST_VERSION_MICRO >= 19)
    { QtMultimedia::MetaData::Composer, GST_TAG_COMPOSER },
#endif
    //{ QtMultimedia::MetaData::Conductor, 0 },
    //{ QtMultimedia::MetaData::Lyrics, 0 },
    //{ QtMultimedia::MetaData::Mood, 0 },
    { QtMultimedia::MetaData::TrackNumber, GST_TAG_TRACK_NUMBER },

    //{ QtMultimedia::MetaData::CoverArtUrlSmall, 0 },
    //{ QtMultimedia::MetaData::CoverArtUrlLarge, 0 },

    // Image/Video
    //{ QtMultimedia::MetaData::Resolution, 0 },
    //{ QtMultimedia::MetaData::PixelAspectRatio, 0 },

    // Video
    //{ QtMultimedia::MetaData::VideoFrameRate, 0 },
    //{ QtMultimedia::MetaData::VideoBitRate, 0 },
    { QtMultimedia::MetaData::VideoCodec, GST_TAG_VIDEO_CODEC },

    //{ QtMultimedia::MetaData::PosterUrl, 0 },

    // Movie
    //{ QtMultimedia::MetaData::ChapterNumber, 0 },
    //{ QtMultimedia::MetaData::Director, 0 },
    { QtMultimedia::MetaData::LeadPerformer, GST_TAG_PERFORMER },
    //{ QtMultimedia::MetaData::Writer, 0 },

    // Photos
    //{ QtMultimedia::MetaData::CameraManufacturer, 0 },
    //{ QtMultimedia::MetaData::CameraModel, 0 },
    //{ QtMultimedia::MetaData::Event, 0 },
    //{ QtMultimedia::MetaData::Subject, 0 }
};

CameraBinMetaData::CameraBinMetaData(QObject *parent)
    :QMetaDataWriterControl(parent)
{
}

QVariant CameraBinMetaData::metaData(const QString &key) const
{
    static const int count = sizeof(qt_gstreamerMetaDataKeys) / sizeof(QGstreamerMetaDataKeyLookup);

    for (int i = 0; i < count; ++i) {
        if (qt_gstreamerMetaDataKeys[i].key == key) {
            const char *name = qt_gstreamerMetaDataKeys[i].token;

            return m_values.value(QByteArray::fromRawData(name, qstrlen(name)));
        }
    }
    return QVariant();
}

void CameraBinMetaData::setMetaData(const QString &key, const QVariant &value)
{
    static const int count = sizeof(qt_gstreamerMetaDataKeys) / sizeof(QGstreamerMetaDataKeyLookup);

    for (int i = 0; i < count; ++i) {
        if (qt_gstreamerMetaDataKeys[i].key == key) {
            const char *name = qt_gstreamerMetaDataKeys[i].token;

            m_values.insert(QByteArray::fromRawData(name, qstrlen(name)), value);

            emit QMetaDataWriterControl::metaDataChanged();
            emit metaDataChanged(m_values);

            return;
        }
    }
}

QStringList CameraBinMetaData::availableMetaData() const
{
    static QMap<QByteArray, QString> 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;
        }
    }

    QStringList res;
    foreach (const QByteArray &key, m_values.keys()) {
        QString tag = keysMap.value(key);
        if (!tag.isEmpty())
            res.append(tag);
    }

    return res;
}