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#include "qgstreamerplayersession.h"

#include "qgstreamerbushelper.h"

#include "qgstreamervideorendererinterface.h"

#include <gst/gstvalue.h>

#include <QtCore/qdatetime.h>

#include <QtCore/qdebug.h>

#if defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)

#define USE_PLAYBIN2

#endif

QGstreamerPlayerSession::QGstreamerPlayerSession(QObject *parent)

    :QObject(parent),

     m_state(QMediaPlayer::StoppedState),

     m_busHelper(0),

     m_playbin(0),

     m_bus(0),

     m_renderer(0),

     m_volume(100),

     m_playbackRate(1.0),

     m_muted(false),

     m_audioAvailable(false),

     m_videoAvailable(false),

     m_seekable(false),

     m_lastPosition(0),

     m_duration(-1)

{

    static bool initialized = false;

    if (!initialized) {

        initialized = true;

        gst_init(NULL, NULL);

    }

#ifdef USE_PLAYBIN2

    m_playbin = gst_element_factory_make("playbin2", NULL);

#else

    m_playbin = gst_element_factory_make("playbin", NULL);

#endif

    if (m_playbin != 0) {

        // Sort out messages

        m_bus = gst_element_get_bus(m_playbin);

        m_busHelper = new QGstreamerBusHelper(m_bus, this);

        connect(m_busHelper, SIGNAL(message(QGstreamerMessage)), SLOT(busMessage(QGstreamerMessage)));

        m_busHelper->installSyncEventFilter(this);

        // Initial volume

        double volume = 1.0;

        g_object_get(G_OBJECT(m_playbin), "volume", &volume, NULL);

        m_volume = int(volume*100);

    }

}

QGstreamerPlayerSession::~QGstreamerPlayerSession()

{

    if (m_playbin) {

        stop();

        delete m_busHelper;

        gst_object_unref(GST_OBJECT(m_bus));

        gst_object_unref(GST_OBJECT(m_playbin));

    }

}

void QGstreamerPlayerSession::load(const QUrl &url)

{

    m_url = url;

    if (m_playbin) {

        m_tags.clear();

        emit tagsChanged();

        g_object_set(G_OBJECT(m_playbin), "uri", m_url.toEncoded().constData(), NULL);

        if (!m_streamTypes.isEmpty()) {

            m_streamProperties.clear();

            m_streamTypes.clear();

            emit streamsChanged();

        }

    }

}

qint64 QGstreamerPlayerSession::duration() const

{

    return m_duration;

}

qint64 QGstreamerPlayerSession::position() const

{

    GstFormat   format = GST_FORMAT_TIME;

    gint64      position = 0;

    if ( m_playbin && gst_element_query_position(m_playbin, &format, &position))

        return position / 1000000;

    else

        return 0;

}

qreal QGstreamerPlayerSession::playbackRate() const

{

    return m_playbackRate;

}

void QGstreamerPlayerSession::setPlaybackRate(qreal rate)

{

    if (!qFuzzyCompare(m_playbackRate, rate)) {

        m_playbackRate = rate;

        if (m_playbin) {

            gst_element_seek(m_playbin, rate, GST_FORMAT_TIME,

                             GST_SEEK_TYPE_NONE,0,

                             GST_SEEK_TYPE_NONE,0 );

        }

    }

}

int QGstreamerPlayerSession::activeStream(QMediaStreamsControl::StreamType streamType) const

{

    int streamNumber = -1;

    if (m_playbin) {

        switch (streamType) {

        case QMediaStreamsControl::AudioStream:

            g_object_set(G_OBJECT(m_playbin), "current-audio", streamNumber, NULL);

            break;

        case QMediaStreamsControl::VideoStream:

            g_object_set(G_OBJECT(m_playbin), "current-video", streamNumber, NULL);

            break;

        case QMediaStreamsControl::SubPictureStream:

            g_object_set(G_OBJECT(m_playbin), "current-text", streamNumber, NULL);

            break;

        default:

            break;

        }

    }

#ifdef USE_PLAYBIN2

    streamNumber += m_playbin2StreamOffset.value(streamType,0);

#endif

    return streamNumber;

}

void QGstreamerPlayerSession::setActiveStream(QMediaStreamsControl::StreamType streamType, int streamNumber)

{

#ifdef USE_PLAYBIN2

    streamNumber -= m_playbin2StreamOffset.value(streamType,0);

#endif

    if (m_playbin) {

        switch (streamType) {

        case QMediaStreamsControl::AudioStream:

            g_object_get(G_OBJECT(m_playbin), "current-audio", &streamNumber, NULL);

            break;

        case QMediaStreamsControl::VideoStream:

            g_object_get(G_OBJECT(m_playbin), "current-video", &streamNumber, NULL);

            break;

        case QMediaStreamsControl::SubPictureStream:

            g_object_get(G_OBJECT(m_playbin), "current-text", &streamNumber, NULL);

            break;

        default:

            break;

        }

    }

}

bool QGstreamerPlayerSession::isBuffering() const

{

    return false;

}

int QGstreamerPlayerSession::bufferingProgress() const

{

    return 0;

}

int QGstreamerPlayerSession::volume() const

{

    return m_volume;

}

bool QGstreamerPlayerSession::isMuted() const

{

    return m_muted;

}

bool QGstreamerPlayerSession::isAudioAvailable() const

{

    return m_audioAvailable;

}

{

}

bool QGstreamerPlayerSession::isVideoAvailable() const

{

    return m_videoAvailable;

}

bool QGstreamerPlayerSession::isSeekable() const

{

    return m_seekable;

}

bool QGstreamerPlayerSession::play()

{

    if (m_playbin) {

        if (gst_element_set_state(m_playbin, GST_STATE_PLAYING) == GST_STATE_CHANGE_FAILURE) {

            qWarning() << "GStreamer; Unable to play -" << m_url.toString();

            m_state = QMediaPlayer::StoppedState;            

            emit stateChanged(m_state);

            emit error(int(QMediaPlayer::ResourceError), tr("Unable to play %1").arg(m_url.path()));

        } else

            return true;

    }

    return false;

}

bool QGstreamerPlayerSession::pause()

{

    if (m_playbin) {

        if (gst_element_set_state(m_playbin, GST_STATE_PAUSED) == GST_STATE_CHANGE_FAILURE) {

            qWarning() << "GStreamer; Unable to play -" << m_url.toString();

            m_state = QMediaPlayer::StoppedState;

            emit stateChanged(m_state);

            emit error(int(QMediaPlayer::ResourceError), tr("Unable to play %1").arg(m_url.path()));

        } else

            return true;

    }

    return false;

}

void QGstreamerPlayerSession::stop()

{

    if (m_playbin) {

        gst_element_set_state(m_playbin, GST_STATE_NULL);

        //we have to do it here, since gstreamer will not emit bus messages any more

    }

}

bool QGstreamerPlayerSession::seek(qint64 ms)

{

    }

    return false;

}

void QGstreamerPlayerSession::setVolume(int volume)

{

    if (m_volume != volume) {

        m_volume = volume;

        if (m_playbin) {

#ifndef USE_PLAYBIN2

            if(!m_muted)

#endif

                g_object_set(G_OBJECT(m_playbin), "volume", m_volume/100.0, NULL);